Styles

Styles are used to set the appearance of the objects. Styles in lvgl are heavily inspired by CSS. The concept in nutshell is as follows:

  • A style is an lv_style_t variable which can hold properties like border width, text color and so on. It's similar to a class in CSS.

  • Styles can be assigned to objects to change their appearance. During the assignment the target part (pseudo element in CSS) and target state (pseudo class) can be specified. For example one can add style_blue to the knob of a slider when it's in pressed state.

  • The same style can be used by any number of objects.

  • Styles can be cascaded which means multiple styles can be assigned to an object and each style can have different properties. Therefore not all properties have to be specified in style. LVLG will look for a property until a style defines it or use a default if it's not spefied by any of the styles. For example style_btn can result in a default gray button and style_btn_red can add only a background-color=red to overwrite the background color.

  • Later added styles have higher precedence. It means if a property is specified in two styles the later added will be used.

  • Some properties (e.g. text color) can be inherited from the parent(s) if it's not specified in the object.

  • Objects can have local styles that have higher precedence than "normal" styles.

  • Unlike CSS (where pseudo-classes describe different states, e.g. :focus), in LVGL a property is assigned to a given state.

  • Transitions can be applied when the object changes state.

States

The objects can be in the combination of the following states:

  • LV_STATE_DEFAULT (0x0000) Normal, released state

  • LV_STATE_CHECKED (0x0001) Toggled or checked state

  • LV_STATE_FOCUSED (0x0002) Focused via keypad or encoder or clicked via touchpad/mouse

  • LV_STATE_FOCUS_KEY (0x0004) Focused via keypad or encoder but not via touchpad/mouse

  • LV_STATE_EDITED (0x0008) Edit by an encoder

  • LV_STATE_HOVERED (0x0010) Hovered by mouse (not supported now)

  • LV_STATE_PRESSED (0x0020) Being pressed

  • LV_STATE_SCROLLED (0x0040) Being scrolled

  • LV_STATE_DISABLED (0x0080) Disabled state

  • LV_STATE_USER_1 (0x1000) Custom state

  • LV_STATE_USER_2 (0x2000) Custom state

  • LV_STATE_USER_3 (0x4000) Custom state

  • LV_STATE_USER_4 (0x8000) Custom state

The combination states the object can be focused and pressed at the same time. This is represented as LV_STATE_FOCUSED | LV_STATE_PRESSED.

The style can be added to any state and state combination. For example, setting a different background color for default and pressed state. If a property is not defined in a state the best matching state's property will be used. Typically this means the property with LV_STATE_DEFAULT is used.˛ If the property is not set even for the default state the default value will be used. (See later)

But what does the "best matching state's property" really mean? States have a precedence which is shown by their value (see in the above list). A higher value means higher precedence. To determine which state's property to use let's take an example. Imagine the background color is defined like this:

  • LV_STATE_DEFAULT: white

  • LV_STATE_PRESSED: gray

  • LV_STATE_FOCUSED: red

  1. By the default the object is in default state, so it's a simple case: the property is perfectly defined in the object's current state as white.

  2. When the object is pressed there are 2 related properties: default with white (default is related to every state) and pressed with gray. The pressed state has 0x0020 precedence which is higher than the default state's 0x0000 precedence, so gray color will be used.

  3. When the object is focused the same thing happens as in pressed state and red color will be used. (Focused state has higher precedence than default state).

  4. When the object is focused and pressed both gray and red would work, but the pressed state has higher precedence than focused so gray color will be used.

  5. It's possible to set e.g rose color for LV_STATE_PRESSED | LV_STATE_FOCUSED. In this case, this combined state has 0x0020 + 0x0002 = 0x0022 precedence, which is higher than the pressed state's precedence so rose color would be used.

  6. When the object is in checked state there is no property to set the background color for this state. So for lack of a better option, the object remains white from the default state's property.

Some practical notes:

  • The precedence (value) of states is quite intuitive and it's something the user would expect naturally. E.g. if an object is focused the user will still want to see if it's pressed, therefore pressed state has a higher precedence. If the focused state had a higher precedence it would overwrite the pressed color.

  • If you want to set a property for all states (e.g. red background color) just set it for the default state. If the object can't find a property for its current state it will fall back to the default state's property.

  • Use ORed states to describe the properties for complex cases. (E.g. pressed + checked + focused)

  • It might be a good idea to use different style elements for different states. For example, finding background colors for released, pressed, checked + pressed, focused, focused + pressed, focused + pressed + checked, etc states is quite difficult. Instead, for example, use the background color for pressed and checked states and indicate the focused state with a different border color.

Cascading styles

It's not required to set all the properties in one style. It's possible to add more styles to an object and let the later added style to modify or extend appearance. For example, create a general gray button style and create a new for red buttons where only the new background color is set.

This is much like in CSS when used classes are listed like <div class=".btn .btn-red">.

Styles added later have precedence over ones set earlier. So in the gray/red button example above, the normal button style should be added first and the red style second. However, the precedence coming from states are still taken into account. So let's examine the following case:

  • the basic button style defines dark-gray color for default state and light-gray color pressed state

  • the red button style defines the background color as red only in the default state

In this case, when the button is released (it's in default state) it will be red because a perfect match is found in the most recently added style (red). When the button is pressed the light-gray color is a better match because it describes the current state perfectly, so the button will be light-gray.

Inheritance

Some properties (typically that are related to texts) can be inherited from the parent object's styles. Inheritance is applied only if the given property is not set in the object's styles (even in default state). In this case, if the property is inheritable, the property's value will be searched in the parents too until an object specifies a value for the property. The parents will use their own state to detemine the value. So if a button is pressed, and the text color comes from here, the pressed text color will be used.

Parts

Objects can have parts which can have their own styles.

The following predefined parts exist in LVGL:

  • LV_PART_MAIN A background like rectangle*/

  • LV_PART_SCROLLBAR The scrollbar(s)

  • LV_PART_INDICATOR Indicator, e.g. for slider, bar, switch, or the tick box of the checkbox

  • LV_PART_KNOB Like a handle to grab to adjust the value*/

  • LV_PART_SELECTED Indicate the currently selected option or section

  • LV_PART_ITEMS Used if the widget has multiple similar elements (e.g. table cells)*/

  • LV_PART_TICKS Ticks on scales e.g. for a chart or meter

  • LV_PART_CURSOR Mark a specific place e.g. text area's or chart's cursor

  • LV_PART_CUSTOM_FIRST Custom parts can be added from here.

For example a Slider has three parts:

  • Background

  • Indiactor

  • Knob

It means the all three parts of the slider can have their own styles. See later how to add style styles to objects and parts.

Initialize styles and set/get properties

Styles are stored in lv_style_t variables. Style variables should be static, global or dynamically allocated. In other words they can not be local variables in functions which are destroyed when the function exists. Before using a style it should be initialized with lv_style_init(&my_style). After initializing the style properties can be set or added to it.

Property set functions looks like this: lv_style_set_<property_name>(&style, <value>); For example:

static lv_style_t style_btn;
lv_style_init(&style_btn);
lv_style_set_bg_color(&style_btn, lv_color_grey());
lv_style_set_bg_opa(&style_btn, LV_OPA_50);
lv_style_set_border_width(&style_btn, 2);
lv_style_set_border_color(&style_btn, lv_color_black());

static lv_style_t style_btn_red;
lv_style_init(&style_btn_red);
lv_style_set_bg_color(&style_btn_red, lv_color_red());
lv_style_set_bg_opa(&style_btn_red, LV_OPA_COVER);

To remove a property use:

lv_style_remove_prop(&style, LV_STYLE_BG_COLOR);

To get a property's value from a style:

lv_style_value_t v;
lv_res_t res = lv_style_rget_prop(&style, LV_STYLE_BG_COLOR, &v);
if(res == LV_RES_OK) {	/*Found*/
	do_something(v.color);
}

lv_style_value_t has 3 fields:

  • num for integer, boolean and opacity properties

  • color for color properties

  • ptr for pointer properties

To reset a style (free all its data) use

lv_style_reset(&style);

Add and remove styles to a widget

A style on its own is not that useful, it needs to be assigned to an object to take effect.

Add styles

To add a style to an object use lv_obj_add_style(obj, &style, <selector>). <selector> is an OR-ed value of parts and state to which the style should be added. Some examples:

  • LV_PART_MAIN | LV_STATE_DEFAULT

  • LV_STATE_PRESSED: The main part in pressed state. LV_PART_MAIN can be omitted

  • LV_PART_SCROLLBAR: The scrollbar part in the default state. LV_STATE_DEFAULT can be omitted.

  • LV_PART_SCROLLBAR | LV_STATE_SCROLLED: The scrollbar part when the object is being scrolled

  • 0 Same as LV_PART_MAIN | LV_STATE_DEFAULT.

  • LV_PART_INDICATOR | LV_STATE_PRESSED | LV_STATE_CHECKED The indicator part when the object is pressed and checked at the same time.

Using lv_obj_add_style:

lv_obj_add_style(btn, &style_btn, 0);      				  /*Default button style*/
lv_obj_add_style(btn, &btn_red, LV_STATE_PRESSED);  /*Overwrite only a some colors to red when pressed*/

Remove styles

To remove all styles from an object use lv_obj_remove_style_all(obj).

To remove specific styles use lv_obj_remove_style(obj, style, selector). This function will remove style only if the selector matches with the selector used in lv_obj_add_style. style can be NULL to check only the selector and remove all matching styles. The selector can use the LV_STATE_ANY and LV_PART_ANY values to remove the style with any state or part.

Report style changes

If a style which is already assigned to object changes (i.e. a property is added or changed) the objects using that style should be notified. There are 3 options to do this:

  1. If you know that the changed properties can be applied by a simple redraw (e.g. color or opacity changes) just call lv_obj_invalidate(obj) or lv_obj_invalideate(lv_scr_act()).

  2. If more complex style properties were changed or added, and you know which object(s) are affected by that style call lv_obj_refresh_style(obj, part, property). To refresh all parts and properties use lv_obj_refresh_style(obj, LV_PART_ANY, LV_STYLE_PROP_ANY).

  3. To make LVGL check all objects to see whether they use the style and refresh them when needed call lv_obj_report_style_change(&style). If style is NULL all objects will be notified about the style change.

Get a property's value on an object

To get a final value of property - considering cascading, inheritance, local styles and transitions (see below) - get functions like this can be used: lv_obj_get_style_<property_name>(obj, <part>). These functions uses the object's current state and if no better candidate returns a default value.   For example:

lv_color_t color = lv_obj_get_style_bg_color(btn, LV_PART_MAIN);

Local styles

Besides "normal" styles, the objects can store local styles too. This concept is similar to inline styles in CSS (e.g. <div style="color:red">) with some modification.

So local styles are like normal styles but they can't be shared among other objects. If used, local styles are allocated automatically, and freed when the object is deleted. They are useful to add local customization to the object.

Unlike in CSS, in LVGL local styles can be assigned to states (pseudo-classes) and parts (pseudo-elements).

To set a local property use functions like lv_obj_set_style_local_<property_name>(obj, <value>, <selector>);   For example:

lv_obj_set_style_local_bg_color(slider, lv_color_red(), LV_PART_INDICATOR | LV_STATE_FOCUSED);

Properties

For the full list of style properties click here.

Typical background properties

In the documentation of the widgets you will see sentences like "The widget use the typical background properties". The "typical background properties" are the ones related to:

  • Background

  • Border

  • Outline

  • Shadow

  • Padding

  • Width and height transformation

  • X and Y translation

Transitions

By default, when an object changes state (e.g. it's pressed) the new properties from the new state are set immediately. However, with transitions it's possible to play an animation on state change. For example, on pressing a button its background color can be animated to the pressed color over 300 ms.

The parameters of the transitions are stored in the styles. It's possible to set

  • the time of the transition

  • the delay before starting the transition

  • the animation path (also known as timing or easing function)

  • the properties to animate

The transition properties can be defined for each state. For example, setting 500 ms transition time in default state will mean that when the object goes to the default state a 500 ms transition time will be applied. Setting 100 ms transition time in the pressed state will mean a 100 ms transition time when going to pressed state. So this example configuration will result in going to pressed state quickly and then going back to default slowly.

To describe a transition an lv_transition_dsc_t variable needs to initialized and added to a style:

/*Only its pointer is saved so must static, global or dynamically allocated */
static const lv_style_prop_t trans_props[] = {
											LV_STYLE_BG_OPA, LV_STYLE_BG_COLOR,
											0, /*End marker*/
};

static lv_style_transition_dsc_t trans1;
lv_style_transition_dsc_init(&trans1, trans_props, lv_anim_path_ease_out, duration_ms, delay_ms);

lv_style_set_transition(&style1, &trans1);

Color filter

TODO

Themes

Themes are a collection of styles. If there is an active theme LVGL applies it on every created widget. This will give a default appearance to the UI which can then be modified by adding further styles.

Every display can have a different theme. For example you could have a colorful theme on a TFT and monochrome theme on a secondary monochrome display.

To set a theme for a display, 2 steps are required:

  1. Initialize a theme

  2. Assign the initialized theme to a display.

Theme initialization functions can have different prototype. This example shows how to set the "default" theme:

lv_theme_t * th = lv_theme_default_init(display,  /*Use the DPI, size, etc from this display*/ 
                                        LV_COLOR_PALETTE_BLUE, LV_COLOR_PALETTE_CYAN,   /*Primary and secondary palette*/
                                        false,    /*Light or dark mode*/ 
                                        &lv_font_montserrat_10, &lv_font_montserrat_14, &lv_font_montserrat_18); /*Small, normal, large fonts*/
                                        
lv_disp_set_theme(display, th); /*Assign the theme to the display*/

The themes can be enabled in lv_conf.h. If the default theme is enabled by LV_USE_THEME_DEFAULT 1 LVGL automatically initializes and sets it when a display is created.

Extending themes

Built-in themes can be extended. If a custom theme is created a parent theme can be selected. The parent theme's styles will be added before the custom theme's styles. Any number of themes can be chained this way. E.g. default theme -> custom theme -> dark theme.

lv_theme_set_parent(new_theme, base_theme) extends the base_theme with the new_theme.

There is an example for it below.

Examples

Size styles

Click to try in the MicroPython simulator!
#include "../lv_examples.h"
#if LV_BUILD_EXAMPLES && LV_USE_IMG

/**
 * Using the Size, Position and Padding style properties
 */
void lv_example_style_1(void)
{
     static lv_style_t style;
     lv_style_init(&style);
     lv_style_set_radius(&style, 5);

     /*Make a gradient*/
     lv_style_set_width(&style, 150);
     lv_style_set_height(&style, LV_SIZE_CONTENT);

     lv_style_set_pad_ver(&style, 20);
     lv_style_set_pad_left(&style, 5);

     lv_style_set_x(&style, lv_pct(50));
     lv_style_set_y(&style, 80);

     /*Create an object with the new style*/
     lv_obj_t * obj = lv_obj_create(lv_scr_act());
     lv_obj_add_style(obj, &style, 0);

     lv_obj_t * label = lv_label_create(obj);
     lv_label_set_text(label, "Hello");
}

#endif

MicroPython code     view on GitHub

#
# Using the Size, Position and Padding style properties
#
style = lv.style_t()
style.init()
style.set_radius(5)

# Make a gradient
style.set_width(150)
style.set_height(lv.SIZE.CONTENT)

style.set_pad_ver(20)
style.set_pad_left(5)

style.set_x(lv.pct(50))
style.set_y(80)

# Create an object with the new style
obj = lv.obj(lv.scr_act())
obj.add_style(style, 0)

label = lv.label(obj)
label.set_text("Hello");


Background styles

Click to try in the MicroPython simulator!
#include "../lv_examples.h"
#if LV_BUILD_EXAMPLES

/**
 * Using the background style properties
 */
void lv_example_style_2(void)
{
    static lv_style_t style;
    lv_style_init(&style);
    lv_style_set_radius(&style, 5);

    /*Make a gradient*/
    lv_style_set_bg_opa(&style, LV_OPA_COVER);
    lv_style_set_bg_color(&style, lv_palette_lighten(LV_PALETTE_GREY, 1));
    lv_style_set_bg_grad_color(&style, lv_palette_main(LV_PALETTE_BLUE));
    lv_style_set_bg_grad_dir(&style, LV_GRAD_DIR_VER);

    /*Shift the gradient to the bottom*/
    lv_style_set_bg_main_stop(&style, 128);
    lv_style_set_bg_grad_stop(&style, 192);

    /*Create an object with the new style*/
    lv_obj_t * obj = lv_obj_create(lv_scr_act());
    lv_obj_add_style(obj, &style, 0);
    lv_obj_center(obj);
}

#endif

MicroPython code     view on GitHub

#
# Using the background style properties
#
style = lv.style_t()
style.init()
style.set_radius(5)

# Make a gradient
style.set_bg_opa(lv.OPA.COVER)
style.set_bg_color(lv.palette_lighten(lv.PALETTE.GREY, 1))
style.set_bg_grad_color(lv.palette_main(lv.PALETTE.BLUE))
style.set_bg_grad_dir(lv.GRAD_DIR.VER)

# Shift the gradient to the bottom
style.set_bg_main_stop(128)
style.set_bg_grad_stop(192)

# Create an object with the new style
obj = lv.obj(lv.scr_act())
obj.add_style(style, 0)
obj.center()


Border styles

Click to try in the MicroPython simulator!
#include "../lv_examples.h"
#if LV_BUILD_EXAMPLES

/**
 * Using the border style properties
 */
void lv_example_style_3(void)
{
    static lv_style_t style;
    lv_style_init(&style);

    /*Set a background color and a radius*/
    lv_style_set_radius(&style, 10);
    lv_style_set_bg_opa(&style, LV_OPA_COVER);
    lv_style_set_bg_color(&style, lv_palette_lighten(LV_PALETTE_GREY, 1));

    /*Add border to the bottom+right*/
    lv_style_set_border_color(&style, lv_palette_main(LV_PALETTE_BLUE));
    lv_style_set_border_width(&style, 5);
    lv_style_set_border_opa(&style, LV_OPA_50);
    lv_style_set_border_side(&style, LV_BORDER_SIDE_BOTTOM | LV_BORDER_SIDE_RIGHT);

    /*Create an object with the new style*/
    lv_obj_t * obj = lv_obj_create(lv_scr_act());
    lv_obj_add_style(obj, &style, 0);
    lv_obj_center(obj);
}

#endif

MicroPython code     view on GitHub

#
# Using the border style properties
#
style = lv.style_t()
style.init()

# Set a background color and a radius
style.set_radius(10)
style.set_bg_opa(lv.OPA.COVER)
style.set_bg_color(lv.palette_lighten(lv.PALETTE.GREY, 1))

# Add border to the bottom+right
style.set_border_color(lv.palette_main(lv.PALETTE.BLUE))
style.set_border_width(5)
style.set_border_opa(lv.OPA._50)
style.set_border_side(lv.BORDER_SIDE.BOTTOM | lv.BORDER_SIDE.RIGHT)

# Create an object with the new style
obj = lv.obj(lv.scr_act())
obj.add_style(style, 0)
obj.center()


Outline styles

Click to try in the MicroPython simulator!
#include "../lv_examples.h"
#if LV_BUILD_EXAMPLES

/**
 * Using the outline style properties
 */
void lv_example_style_4(void)
{
    static lv_style_t style;
    lv_style_init(&style);

    /*Set a background color and a radius*/
    lv_style_set_radius(&style, 5);
    lv_style_set_bg_opa(&style, LV_OPA_COVER);
    lv_style_set_bg_color(&style, lv_palette_lighten(LV_PALETTE_GREY, 1));

    /*Add outline*/
    lv_style_set_outline_width(&style, 2);
    lv_style_set_outline_color(&style, lv_palette_main(LV_PALETTE_BLUE));
    lv_style_set_outline_pad(&style, 8);

    /*Create an object with the new style*/
    lv_obj_t * obj = lv_obj_create(lv_scr_act());
    lv_obj_add_style(obj, &style, 0);
    lv_obj_center(obj);
}

#endif

MicroPython code     view on GitHub

#
# Using the outline style properties
#

style = lv.style_t()
style.init()

# Set a background color and a radius
style.set_radius(5)
style.set_bg_opa(lv.OPA.COVER)
style.set_bg_color(lv.palette_lighten(lv.PALETTE.GREY, 1))

# Add outline
style.set_outline_width(2)
style.set_outline_color(lv.palette_main(lv.PALETTE.BLUE))
style.set_outline_pad(8)

# Create an object with the new style
obj = lv.obj(lv.scr_act())
obj.add_style(style, 0)
obj.center()



Shadow styles

Click to try in the MicroPython simulator!
#include "../lv_examples.h"
#if LV_BUILD_EXAMPLES

/**
 * Using the Shadow style properties
 */
void lv_example_style_5(void)
{
    static lv_style_t style;
    lv_style_init(&style);

    /*Set a background color and a radius*/
    lv_style_set_radius(&style, 5);
    lv_style_set_bg_opa(&style, LV_OPA_COVER);
    lv_style_set_bg_color(&style, lv_palette_lighten(LV_PALETTE_GREY, 1));

    /*Add a shadow*/
    lv_style_set_shadow_width(&style, 25);
    lv_style_set_shadow_color(&style, lv_palette_main(LV_PALETTE_BLUE));
    lv_style_set_shadow_ofs_x(&style, 10);
    lv_style_set_shadow_ofs_y(&style, 20);

    /*Create an object with the new style*/
    lv_obj_t * obj = lv_obj_create(lv_scr_act());
    lv_obj_add_style(obj, &style, 0);
    lv_obj_center(obj);
}

#endif

MicroPython code     view on GitHub

#
# Using the Shadow style properties
#

style = lv.style_t()
style.init()

# Set a background color and a radius
style.set_radius(5)
style.set_bg_opa(lv.OPA.COVER)
style.set_bg_color(lv.palette_lighten(lv.PALETTE.GREY, 1))

# Add a shadow
style.set_shadow_width(8)
style.set_shadow_color(lv.palette_main(lv.PALETTE.BLUE))
style.set_shadow_ofs_x(10)
style.set_shadow_ofs_y(20)

# Create an object with the new style
obj = lv.obj(lv.scr_act())
obj.add_style(style, 0)
obj.center()


Image styles

Click to try in the MicroPython simulator!
#include "../lv_examples.h"
#if LV_BUILD_EXAMPLES && LV_USE_IMG

/**
 * Using the Image style properties
 */
void lv_example_style_6(void)
{
    static lv_style_t style;
    lv_style_init(&style);

    /*Set a background color and a radius*/
    lv_style_set_radius(&style, 5);
    lv_style_set_bg_opa(&style, LV_OPA_COVER);
    lv_style_set_bg_color(&style, lv_palette_lighten(LV_PALETTE_GREY, 3));
    lv_style_set_border_width(&style, 2);
    lv_style_set_border_color(&style, lv_palette_main(LV_PALETTE_BLUE));

    lv_style_set_img_recolor(&style, lv_palette_main(LV_PALETTE_BLUE));
    lv_style_set_img_recolor_opa(&style, LV_OPA_50);
    lv_style_set_transform_angle(&style, 300);

    /*Create an object with the new style*/
    lv_obj_t * obj = lv_img_create(lv_scr_act());
    lv_obj_add_style(obj, &style, 0);

    LV_IMG_DECLARE(img_cogwheel_argb);
    lv_img_set_src(obj, &img_cogwheel_argb);

    lv_obj_center(obj);
}

#endif

MicroPython code     view on GitHub

from imagetools import get_png_info, open_png
# Register PNG image decoder
decoder = lv.img.decoder_create()
decoder.info_cb = get_png_info
decoder.open_cb = open_png

# Create an image from the png file
try:
    with open('../assets/img_cogwheel_argb.png','rb') as f:
        png_data = f.read()
except:
    print("Could not find img_cogwheel_argb.png")
    sys.exit()
    
img_cogwheel_argb = lv.img_dsc_t({
  'data_size': len(png_data),
  'data': png_data 
})

#
# Using the Image style properties
#
style = lv.style_t()
style.init()

# Set a background color and a radius
style.set_radius(5)
style.set_bg_opa(lv.OPA.COVER)
style.set_bg_color(lv.palette_lighten(lv.PALETTE.GREY, 3))
style.set_border_width(2)
style.set_border_color(lv.palette_main(lv.PALETTE.BLUE))

style.set_img_recolor(lv.palette_main(lv.PALETTE.BLUE))
style.set_img_recolor_opa(lv.OPA._50)
# style.set_transform_angle(300)

# Create an object with the new style
obj = lv.img(lv.scr_act())
obj.add_style(style, 0)

obj.set_src(img_cogwheel_argb)

obj.center()


Arc styles

Click to try in the MicroPython simulator!
Error encountered while trying to open /home/runner/work/lvgl/lvgl/examples/style/lv_example_style_7.c

MicroPython code     view on GitHub

Error encountered while trying to open /home/runner/work/lvgl/lvgl/examples/style/lv_example_style_7.py

Text styles

Click to try in the MicroPython simulator!
#include "../lv_examples.h"
#if LV_BUILD_EXAMPLES && LV_USE_LABEL

/**
 * Using the text style properties
 */
void lv_example_style_8(void)
{
    static lv_style_t style;
    lv_style_init(&style);

    lv_style_set_radius(&style, 5);
    lv_style_set_bg_opa(&style, LV_OPA_COVER);
    lv_style_set_bg_color(&style, lv_palette_lighten(LV_PALETTE_GREY, 2));
    lv_style_set_border_width(&style, 2);
    lv_style_set_border_color(&style, lv_palette_main(LV_PALETTE_BLUE));
    lv_style_set_pad_all(&style, 10);

    lv_style_set_text_color(&style, lv_palette_main(LV_PALETTE_BLUE));
    lv_style_set_text_letter_space(&style, 5);
    lv_style_set_text_line_space(&style, 20);
    lv_style_set_text_decor(&style, LV_TEXT_DECOR_UNDERLINE);

    /*Create an object with the new style*/
    lv_obj_t * obj = lv_label_create(lv_scr_act());
    lv_obj_add_style(obj, &style, 0);
    lv_label_set_text(obj, "Text of\n"
                            "a label");

    lv_obj_center(obj);
}

#endif

MicroPython code     view on GitHub

#
# Using the text style properties
#

style = lv.style_t()
style.init()

style.set_radius(5)
style.set_bg_opa(lv.OPA.COVER)
style.set_bg_color(lv.palette_lighten(lv.PALETTE.GREY, 3))
style.set_border_width(2)
style.set_border_color(lv.palette_main(lv.PALETTE.BLUE))
style.set_pad_all(10)

style.set_text_color(lv.palette_main(lv.PALETTE.BLUE))
style.set_text_letter_space(5)
style.set_text_line_space(20)
style.set_text_decor(lv.TEXT_DECOR.UNDERLINE)

# Create an object with the new style
obj = lv.label(lv.scr_act())
obj.add_style(style, 0)
obj.set_text("Text of\n"
             "a label");

obj.center()


Line styles

Click to try in the MicroPython simulator!
#include "../lv_examples.h"
#if LV_BUILD_EXAMPLES && LV_USE_LINE

/**
 * Using the line style properties
 */
void lv_example_style_9(void)
{
    static lv_style_t style;
    lv_style_init(&style);

    lv_style_set_line_color(&style, lv_palette_main(LV_PALETTE_GREY));
    lv_style_set_line_width(&style, 6);
    lv_style_set_line_rounded(&style, true);

    /*Create an object with the new style*/
    lv_obj_t * obj = lv_line_create(lv_scr_act());
    lv_obj_add_style(obj, &style, 0);

    static lv_point_t p[] = {{10, 30}, {30, 50}, {100, 0}};
    lv_line_set_points(obj, p, 3);

    lv_obj_center(obj);
}

#endif

MicroPython code     view on GitHub

#
# Using the line style properties
#

style = lv.style_t()
style.init()

style.set_line_color(lv.palette_main(lv.PALETTE.GREY))
style.set_line_width(6)
style.set_line_rounded(True)

# Create an object with the new style
obj = lv.line(lv.scr_act())
obj.add_style(style, 0)
p =  [ {"x":10, "y":30}, 
       {"x":30, "y":50}, 
       {"x":100, "y":0}]

obj.set_points(p, 3)

obj.center()


Transition

Click to try in the MicroPython simulator!
#include "../lv_examples.h"
#if LV_BUILD_EXAMPLES && LV_USE_IMG

/**
 * Creating a transition
 */
void lv_example_style_10(void)
{
    static const lv_style_prop_t props[] = {LV_STYLE_BG_COLOR, LV_STYLE_BORDER_COLOR, LV_STYLE_BORDER_WIDTH, 0};

    /* A default transition
     * Make it fast (100ms) and start with some delay (200 ms)*/
    static lv_style_transition_dsc_t trans_def;
    lv_style_transition_dsc_init(&trans_def, props, lv_anim_path_linear, 100, 200, NULL);

    /* A special transition when going to pressed state
     * Make it slow (500 ms) but start  without delay*/
    static lv_style_transition_dsc_t trans_pr;
    lv_style_transition_dsc_init(&trans_pr, props, lv_anim_path_linear, 500, 0, NULL);

    static lv_style_t style_def;
    lv_style_init(&style_def);
    lv_style_set_transition(&style_def, &trans_def);

    static lv_style_t style_pr;
    lv_style_init(&style_pr);
    lv_style_set_bg_color(&style_pr, lv_palette_main(LV_PALETTE_RED));
    lv_style_set_border_width(&style_pr, 6);
    lv_style_set_border_color(&style_pr, lv_palette_darken(LV_PALETTE_RED, 3));
    lv_style_set_transition(&style_pr, &trans_pr);

    /*Create an object with the new style_pr*/
    lv_obj_t * obj = lv_obj_create(lv_scr_act());
    lv_obj_add_style(obj, &style_def, 0);
    lv_obj_add_style(obj, &style_pr, LV_STATE_PRESSED);

    lv_obj_center(obj);
}

#endif

MicroPython code     view on GitHub

#
# Creating a transition
#

props = [lv.STYLE.BG_COLOR, lv.STYLE.BORDER_COLOR, lv.STYLE.BORDER_WIDTH, 0]

# A default transition
# Make it fast (100ms) and start with some delay (200 ms)

trans_def =  lv.style_transition_dsc_t()
trans_def.init(props, lv.anim_t.path_linear, 100, 200, None)

# A special transition when going to pressed state
# Make it slow (500 ms) but start  without delay

trans_pr = lv.style_transition_dsc_t()
trans_pr.init(props, lv.anim_t.path_linear, 500, 0, None)

style_def = lv.style_t()
style_def.init()
style_def.set_transition(trans_def)

style_pr = lv.style_t()
style_pr.init()
style_pr.set_bg_color(lv.palette_main(lv.PALETTE.RED))
style_pr.set_border_width(6)
style_pr.set_border_color(lv.palette_darken(lv.PALETTE.RED, 3))
style_pr.set_transition(trans_pr)

# Create an object with the new style_pr
obj = lv.obj(lv.scr_act())
obj.add_style(style_def, 0)
obj.add_style(style_pr, lv.STATE.PRESSED)

obj.center()


Using multiple styles

Click to try in the MicroPython simulator!
#include "../lv_examples.h"
#if LV_BUILD_EXAMPLES && LV_USE_IMG

/**
 * Using multiple styles
 */
void lv_example_style_11(void)
{
    /*A base style*/
    static lv_style_t style_base;
    lv_style_init(&style_base);
    lv_style_set_bg_color(&style_base, lv_palette_main(LV_PALETTE_LIGHT_BLUE));
    lv_style_set_border_color(&style_base, lv_palette_darken(LV_PALETTE_LIGHT_BLUE, 3));
    lv_style_set_border_width(&style_base, 2);
    lv_style_set_radius(&style_base, 10);
    lv_style_set_shadow_width(&style_base, 10);
    lv_style_set_shadow_ofs_y(&style_base, 5);
    lv_style_set_shadow_opa(&style_base, LV_OPA_50);
    lv_style_set_text_color(&style_base, lv_color_white());
    lv_style_set_width(&style_base, 100);
    lv_style_set_height(&style_base, LV_SIZE_CONTENT);

    /*Set only the properties that should be different*/
    static lv_style_t style_warning;
    lv_style_init(&style_warning);
    lv_style_set_bg_color(&style_warning, lv_palette_main(LV_PALETTE_YELLOW));
    lv_style_set_border_color(&style_warning, lv_palette_darken(LV_PALETTE_YELLOW, 3));
    lv_style_set_text_color(&style_warning, lv_palette_darken(LV_PALETTE_YELLOW, 4));

    /*Create an object with the base style only*/
    lv_obj_t * obj_base = lv_obj_create(lv_scr_act());
    lv_obj_add_style(obj_base, &style_base, 0);
    lv_obj_align(obj_base, LV_ALIGN_LEFT_MID, 20, 0);

    lv_obj_t * label = lv_label_create(obj_base);
    lv_label_set_text(label, "Base");
    lv_obj_center(label);

    /*Create an other object with the base style and earnings style too*/
    lv_obj_t * obj_warning = lv_obj_create(lv_scr_act());
    lv_obj_add_style(obj_warning, &style_base, 0);
    lv_obj_add_style(obj_warning, &style_warning, 0);
    lv_obj_align(obj_warning, LV_ALIGN_RIGHT_MID, -20, 0);

    label = lv_label_create(obj_warning);
    lv_label_set_text(label, "Warning");
    lv_obj_center(label);
}

#endif

MicroPython code     view on GitHub

#
# Using multiple styles
#
# A base style

style_base =  lv.style_t()
style_base.init()
style_base.set_bg_color(lv.palette_main(lv.PALETTE.LIGHT_BLUE))
style_base.set_border_color(lv.palette_darken(lv.PALETTE.LIGHT_BLUE, 3))
style_base.set_border_width(2)
style_base.set_radius(10)
style_base.set_shadow_width(10)
style_base.set_shadow_ofs_y(5)
style_base.set_shadow_opa(lv.OPA._50)
style_base.set_text_color(lv.color_white())
style_base.set_width(100)
style_base.set_height(lv.SIZE.CONTENT)

# Set only the properties that should be different
style_warning = lv.style_t()
style_warning.init()
style_warning.set_bg_color(lv.palette_main(lv.PALETTE.YELLOW))
style_warning.set_border_color(lv.palette_darken(lv.PALETTE.YELLOW, 3))
style_warning.set_text_color(lv.palette_darken(lv.PALETTE.YELLOW, 4))

# Create an object with the base style only
obj_base = lv.obj(lv.scr_act())
obj_base.add_style(style_base, 0)
obj_base.align(lv.ALIGN.LEFT_MID, 20, 0)

label = lv.label(obj_base)
label.set_text("Base")
label.center()

# Create an other object with the base style and earnings style too
obj_warning = lv.obj(lv.scr_act())
obj_warning.add_style(style_base, 0)
obj_warning.add_style(style_warning, 0)
obj_warning.align(lv.ALIGN.RIGHT_MID, -20, 0)

label = lv.label(obj_warning)
label.set_text("Warning")
label.center()


Local styles

Click to try in the MicroPython simulator!
#include "../lv_examples.h"
#if LV_BUILD_EXAMPLES && LV_USE_IMG

/**
 * Local styles
 */
void lv_example_style_12(void)
{
    static lv_style_t style;
    lv_style_init(&style);
    lv_style_set_bg_color(&style, lv_palette_main(LV_PALETTE_GREEN));
    lv_style_set_border_color(&style, lv_palette_lighten(LV_PALETTE_GREEN, 3));
    lv_style_set_border_width(&style, 3);

    lv_obj_t * obj = lv_obj_create(lv_scr_act());
    lv_obj_add_style(obj, &style, 0);

    /*Overwrite the background color locally*/
    lv_obj_set_style_bg_color(obj,lv_palette_main(LV_PALETTE_ORANGE), LV_PART_MAIN);

    lv_obj_center(obj);
}

#endif

MicroPython code     view on GitHub

#
# Local styles
#

style = lv.style_t()
style.init()
style.set_bg_color(lv.palette_main(lv.PALETTE.GREEN))
style.set_border_color(lv.palette_lighten(lv.PALETTE.GREEN, 3))
style.set_border_width(3)

obj = lv.obj(lv.scr_act())
obj.add_style(style, 0)

# Overwrite the background color locally
obj.set_style_bg_color(lv.palette_main(lv.PALETTE.ORANGE), lv.PART.MAIN)

obj.center()


Add styles to parts and states

Click to try in the MicroPython simulator!
#include "../lv_examples.h"
#if LV_BUILD_EXAMPLES && LV_USE_IMG

/**
 * Add styles to parts and states
 */
void lv_example_style_13(void)
{
    static lv_style_t style_indic;
    lv_style_init(&style_indic);
    lv_style_set_bg_color(&style_indic, lv_palette_lighten(LV_PALETTE_RED, 3));
    lv_style_set_bg_grad_color(&style_indic, lv_palette_main(LV_PALETTE_RED));
    lv_style_set_bg_grad_dir(&style_indic, LV_GRAD_DIR_HOR);

    static lv_style_t style_indic_pr;
    lv_style_init(&style_indic_pr);
    lv_style_set_shadow_color(&style_indic_pr, lv_palette_main(LV_PALETTE_RED));
    lv_style_set_shadow_width(&style_indic_pr, 10);
    lv_style_set_shadow_spread(&style_indic_pr, 3);

    /*Create an object with the new style_pr*/
    lv_obj_t * obj = lv_slider_create(lv_scr_act());
    lv_obj_add_style(obj, &style_indic, LV_PART_INDICATOR);
    lv_obj_add_style(obj, &style_indic_pr, LV_PART_INDICATOR | LV_STATE_PRESSED);
    lv_slider_set_value(obj, 70, LV_ANIM_OFF);
    lv_obj_center(obj);
}

#endif

MicroPython code     view on GitHub

#
# Add styles to parts and states
#

style_indic = lv.style_t()
style_indic.init()
style_indic.set_bg_color(lv.palette_lighten(lv.PALETTE.RED, 3))
style_indic.set_bg_grad_color(lv.palette_main(lv.PALETTE.RED))
style_indic.set_bg_grad_dir(lv.GRAD_DIR.HOR)

style_indic_pr = lv.style_t()
style_indic_pr.init()
style_indic_pr.set_shadow_color(lv.palette_main(lv.PALETTE.RED))
style_indic_pr.set_shadow_width(10)
style_indic_pr.set_shadow_spread(3)

# Create an object with the new style_pr
obj = lv.slider(lv.scr_act())
obj.add_style(style_indic, lv.PART.INDICATOR)
obj.add_style(style_indic_pr, lv.PART.INDICATOR | lv.STATE.PRESSED)
obj.set_value(70, lv.ANIM.OFF)
obj.center()


Extending the current theme

Click to try in the MicroPython simulator!
#include "../lv_examples.h"
#if LV_BUILD_EXAMPLES && LV_USE_IMG


static lv_style_t style_btn;

/*Will be called when the styles of the base theme are already added
  to add new styles*/
static void new_theme_apply_cb(lv_theme_t * th, lv_obj_t * obj)
{
    LV_UNUSED(th);

    if(lv_obj_check_type(obj, &lv_btn_class)) {
        lv_obj_add_style(obj, &style_btn, 0);
    }
}

static void new_theme_init_and_set(void)
{
    /*Initialize the styles*/
    lv_style_init(&style_btn);
    lv_style_set_bg_color(&style_btn, lv_palette_main(LV_PALETTE_GREEN));
    lv_style_set_border_color(&style_btn, lv_palette_darken(LV_PALETTE_GREEN, 3));
    lv_style_set_border_width(&style_btn, 3);

    /*Initialize the new theme from the current theme*/
    lv_theme_t * th_act = lv_disp_get_theme(NULL);
    static lv_theme_t th_new;
    th_new = *th_act;

    /*Set the parent theme ans the style applay callback for the new theme*/
    lv_theme_set_parent(&th_new, th_act);
    lv_theme_set_apply_cb(&th_new, new_theme_apply_cb);

    /*Assign the new theme the the current display*/
    lv_disp_set_theme(NULL, &th_new);
}



/**
 * Extending the current theme
 */
void lv_example_style_14(void)
{
    lv_obj_t * btn;
    lv_obj_t * label;

    btn = lv_btn_create(lv_scr_act());
    lv_obj_align(btn, LV_ALIGN_TOP_MID, 0, 20);

    label = lv_label_create(btn);
    lv_label_set_text(label, "Original theme");

    new_theme_init_and_set();

    btn = lv_btn_create(lv_scr_act());
    lv_obj_align(btn, LV_ALIGN_BOTTOM_MID, 0, -20);

    label = lv_label_create(btn);
    lv_label_set_text(label, "New theme");


}

#endif

MicroPython code     view on GitHub

# Will be called when the styles of the base theme are already added
# to add new styles


class NewTheme(lv.theme_t):
    def __init__(self):
        super().__init__()
        # Initialize the styles
        self.style_btn = lv.style_t()
        self.style_btn.init()
        self.style_btn.set_bg_color(lv.palette_main(lv.PALETTE.GREEN))
        self.style_btn.set_border_color(lv.palette_darken(lv.PALETTE.GREEN, 3))
        self.style_btn.set_border_width(3)

        # This theme is based on active theme 
        th_act = lv.theme_get_from_obj(lv.scr_act())
        # This theme will be applied only after base theme is applied
        self.set_parent(th_act)        
        
class ExampleStyle_14():
    
    def __init__(self):
        # 
        # Extending the current theme
        #

        btn = lv.btn(lv.scr_act())
        btn.align(lv.ALIGN.TOP_MID, 0, 20)

        label = lv.label(btn)
        label.set_text("Original theme")
        
        self.new_theme_init_and_set()
        
        btn = lv.btn(lv.scr_act())
        btn.align(lv.ALIGN.BOTTOM_MID, 0, -20)
        
        label = lv.label(btn)
        label.set_text("New theme")
        
    def new_theme_apply_cb(self,th, obj):
        print(th,obj)
        if obj.get_class() == lv.btn_class:
            obj.add_style(self.th_new.style_btn, 0)
        
    def new_theme_init_and_set(self):
        print("new_theme_init_and_set")
        # Initialize the new theme from the current theme        
        self.th_new = NewTheme()
        self.th_new.set_apply_cb(self.new_theme_apply_cb)
        lv.disp_get_default().set_theme(self.th_new)
        
exampleStyle_14 = ExampleStyle_14()

API

Typedefs

typedef uint8_t lv_blend_mode_t
typedef uint8_t lv_text_decor_t
typedef uint8_t lv_border_side_t
typedef uint8_t lv_grad_dir_t

Enums

enum [anonymous]

Possible options how to blend opaque drawings

Values:

enumerator LV_BLEND_MODE_NORMAL

Simply mix according to the opacity value

enumerator LV_BLEND_MODE_ADDITIVE

Add the respective color channels

enumerator LV_BLEND_MODE_SUBTRACTIVE

Subtract the foreground from the background

enum [anonymous]

Some options to apply decorations on texts. 'OR'ed values can be used.

Values:

enumerator LV_TEXT_DECOR_NONE
enumerator LV_TEXT_DECOR_UNDERLINE
enumerator LV_TEXT_DECOR_STRIKETHROUGH
enum [anonymous]

Selects on which sides border should be drawn 'OR'ed values can be used.

Values:

enumerator LV_BORDER_SIDE_NONE
enumerator LV_BORDER_SIDE_BOTTOM
enumerator LV_BORDER_SIDE_TOP
enumerator LV_BORDER_SIDE_LEFT
enumerator LV_BORDER_SIDE_RIGHT
enumerator LV_BORDER_SIDE_FULL
enumerator LV_BORDER_SIDE_INTERNAL

FOR matrix-like objects (e.g. Button matrix)

enum [anonymous]

The direction of the gradient.

Values:

enumerator LV_GRAD_DIR_NONE

No gradient (the grad_color property is ignored)

enumerator LV_GRAD_DIR_VER

Vertical (top to bottom) gradient

enumerator LV_GRAD_DIR_HOR

Horizontal (left to right) gradient

enum lv_style_prop_t

Enumeration of all built in style properties

Values:

enumerator LV_STYLE_PROP_INV
enumerator LV_STYLE_WIDTH
enumerator LV_STYLE_MIN_WIDTH
enumerator LV_STYLE_MAX_WIDTH
enumerator LV_STYLE_HEIGHT
enumerator LV_STYLE_MIN_HEIGHT
enumerator LV_STYLE_MAX_HEIGHT
enumerator LV_STYLE_X
enumerator LV_STYLE_Y
enumerator LV_STYLE_ALIGN
enumerator LV_STYLE_TRANSFORM_WIDTH
enumerator LV_STYLE_TRANSFORM_HEIGHT
enumerator LV_STYLE_TRANSLATE_X
enumerator LV_STYLE_TRANSLATE_Y
enumerator LV_STYLE_TRANSFORM_ZOOM
enumerator LV_STYLE_TRANSFORM_ANGLE
enumerator LV_STYLE_PAD_TOP
enumerator LV_STYLE_PAD_BOTTOM
enumerator LV_STYLE_PAD_LEFT
enumerator LV_STYLE_PAD_RIGHT
enumerator LV_STYLE_PAD_ROW
enumerator LV_STYLE_PAD_COLUMN
enumerator LV_STYLE_BG_COLOR
enumerator LV_STYLE_BG_COLOR_FILTERED
enumerator LV_STYLE_BG_OPA
enumerator LV_STYLE_BG_GRAD_COLOR
enumerator LV_STYLE_BG_GRAD_COLOR_FILTERED
enumerator LV_STYLE_BG_GRAD_DIR
enumerator LV_STYLE_BG_MAIN_STOP
enumerator LV_STYLE_BG_GRAD_STOP
enumerator LV_STYLE_BG_IMG_SRC
enumerator LV_STYLE_BG_IMG_OPA
enumerator LV_STYLE_BG_IMG_RECOLOR
enumerator LV_STYLE_BG_IMG_RECOLOR_FILTERED
enumerator LV_STYLE_BG_IMG_RECOLOR_OPA
enumerator LV_STYLE_BG_IMG_TILED
enumerator LV_STYLE_BORDER_COLOR
enumerator LV_STYLE_BORDER_COLOR_FILTERED
enumerator LV_STYLE_BORDER_OPA
enumerator LV_STYLE_BORDER_WIDTH
enumerator LV_STYLE_BORDER_SIDE
enumerator LV_STYLE_BORDER_POST
enumerator LV_STYLE_OUTLINE_WIDTH
enumerator LV_STYLE_OUTLINE_COLOR
enumerator LV_STYLE_OUTLINE_COLOR_FILTERED
enumerator LV_STYLE_OUTLINE_OPA
enumerator LV_STYLE_OUTLINE_PAD
enumerator LV_STYLE_SHADOW_WIDTH
enumerator LV_STYLE_SHADOW_OFS_X
enumerator LV_STYLE_SHADOW_OFS_Y
enumerator LV_STYLE_SHADOW_SPREAD
enumerator LV_STYLE_SHADOW_COLOR
enumerator LV_STYLE_SHADOW_COLOR_FILTERED
enumerator LV_STYLE_SHADOW_OPA
enumerator LV_STYLE_IMG_OPA
enumerator LV_STYLE_IMG_RECOLOR
enumerator LV_STYLE_IMG_RECOLOR_FILTERED
enumerator LV_STYLE_IMG_RECOLOR_OPA
enumerator LV_STYLE_LINE_WIDTH
enumerator LV_STYLE_LINE_DASH_WIDTH
enumerator LV_STYLE_LINE_DASH_GAP
enumerator LV_STYLE_LINE_ROUNDED
enumerator LV_STYLE_LINE_COLOR
enumerator LV_STYLE_LINE_COLOR_FILTERED
enumerator LV_STYLE_LINE_OPA
enumerator LV_STYLE_ARC_WIDTH
enumerator LV_STYLE_ARC_ROUNDED
enumerator LV_STYLE_ARC_COLOR
enumerator LV_STYLE_ARC_COLOR_FILTERED
enumerator LV_STYLE_ARC_OPA
enumerator LV_STYLE_ARC_IMG_SRC
enumerator LV_STYLE_TEXT_COLOR
enumerator LV_STYLE_TEXT_COLOR_FILTERED
enumerator LV_STYLE_TEXT_OPA
enumerator LV_STYLE_TEXT_FONT
enumerator LV_STYLE_TEXT_LETTER_SPACE
enumerator LV_STYLE_TEXT_LINE_SPACE
enumerator LV_STYLE_TEXT_DECOR
enumerator LV_STYLE_TEXT_ALIGN
enumerator LV_STYLE_RADIUS
enumerator LV_STYLE_CLIP_CORNER
enumerator LV_STYLE_OPA
enumerator LV_STYLE_COLOR_FILTER_DSC
enumerator LV_STYLE_COLOR_FILTER_OPA
enumerator LV_STYLE_ANIM_TIME
enumerator LV_STYLE_ANIM_SPEED
enumerator LV_STYLE_TRANSITION
enumerator LV_STYLE_BLEND_MODE
enumerator LV_STYLE_LAYOUT
enumerator LV_STYLE_BASE_DIR
enumerator _LV_STYLE_LAST_BUILT_IN_PROP
enumerator LV_STYLE_PROP_ANY

Functions

LV_EXPORT_CONST_INT(LV_IMG_ZOOM_NONE)
void lv_style_init(lv_style_t *style)

Initialize a style

Note

Do not call lv_style_init on styles that are already have some properties because this function won't free the used memory just set a default state for the style. In other words be sure to initialize styles only once!

Parameters

style -- pointer to a style to initialize

void lv_style_reset(lv_style_t *style)

Clear all properties from a style and free all allocated memories.

Parameters

style -- pointer to a style

lv_style_prop_t lv_style_register_prop(void)
bool lv_style_remove_prop(lv_style_t *style, lv_style_prop_t prop)

Remove a property from a style

Parameters
  • style -- pointer to a style

  • prop -- a style property ORed with a state.

Returns

true: the property was found and removed; false: the property wasn't found

void lv_style_set_prop(lv_style_t *style, lv_style_prop_t prop, lv_style_value_t value)

Set the value of property in a style. This function shouldn't be used directly by the user. Instead use lv_style_set_<prop_name>(). E.g. lv_style_set_bg_color()

Parameters
  • style -- pointer to style

  • prop -- the ID of a property (e.g. LV_STLYE_BG_COLOR)

  • value -- lv_style_value_t variable in which a filed is set according to the type of prop

lv_res_t lv_style_get_prop(lv_style_t *style, lv_style_prop_t prop, lv_style_value_t *value)

Get the value of a property

Note

For performance reasons there are no sanity check on style

Parameters
  • style -- pointer to a style

  • prop -- the ID of a property

  • value -- pointer to a lv_style_value_t variable to store the value

Returns

LV_RES_INV: the property wsn't found in the style (value is unchanged) LV_RES_OK: the property was fond, and value is set accordingly

static inline lv_res_t lv_style_get_prop_inlined(lv_style_t *style, lv_style_prop_t prop, lv_style_value_t *value)

Get the value of a property

Note

For performance reasons there are no sanity check on style

Note

This function is the same as lv_style_get_prop but inlined. Use it only on performance critical places

Parameters
  • style -- pointer to a style

  • prop -- the ID of a property

  • value -- pointer to a lv_style_value_t variable to store the value

Returns

LV_RES_INV: the property wsn't found in the style (value is unchanged) LV_RES_OK: the property was fond, and value is set accordingly

void lv_style_transition_dsc_init(lv_style_transition_dsc_t *tr, const lv_style_prop_t props[], lv_anim_path_cb_t path_cb, uint32_t time, uint32_t delay, void *user_data)
lv_style_value_t lv_style_prop_get_default(lv_style_prop_t prop)

Get the default value of a property

Parameters

prop -- the ID of a property

Returns

the default value

bool lv_style_is_empty(const lv_style_t *style)

Checks if a style is empty (has no properties)

Parameters

style -- pointer to a style

Returns

uint8_t _lv_style_get_prop_group(lv_style_prop_t prop)

Tell the group of a property. If the a property from a group is set in a style the (1 << group) bit of style->has_group is set. It allows early skipping the style if the property is not exists in the style at all.

Parameters

prop -- a style property

Returns

the group [0..7] 7 means all the custom properties with index > 112

static inline void lv_style_set_pad_all(lv_style_t *style, lv_coord_t value)
static inline void lv_style_set_pad_hor(lv_style_t *style, lv_coord_t value)
static inline void lv_style_set_pad_ver(lv_style_t *style, lv_coord_t value)
static inline void lv_style_set_pad_gap(lv_style_t *style, lv_coord_t value)
static inline void lv_style_set_size(lv_style_t *style, lv_coord_t value)
union lv_style_value_t
#include <lv_style.h>

A common type to handle all the property types in the same way.

Public Members

int32_t num

Number integer number (opacity, enums, booleans or "normal" numbers)

const void *ptr

Constant pointers (font, cone text, etc)

lv_color_t color

Colors

struct lv_style_transition_dsc_t
#include <lv_style.h>

Descriptor for style transitions

Public Members

const lv_style_prop_t *props

An array with the properties to animate.

void *user_data

A custom user data that will be passed to the animation's user_data

lv_anim_path_cb_t path_xcb

A path for the animation.

uint32_t time

Duration of the transition in [ms]

uint32_t delay

Delay before the transition in [ms]

struct lv_style_const_prop_t
#include <lv_style.h>

Descriptor of a constant style property.

Public Members

lv_style_prop_t prop
lv_style_value_t value
struct lv_style_t
#include <lv_style.h>

Descriptor of a style (a collection of properties and values).

Public Members

uint32_t sentinel
lv_style_value_t value1
uint8_t *values_and_props
const lv_style_const_prop_t *const_props
union lv_style_t::[anonymous] v_p
uint16_t prop1
uint16_t is_const
uint8_t has_group
uint8_t prop_cnt

Typedefs

typedef void (*lv_theme_apply_cb_t)(struct _lv_theme_t*, lv_obj_t*)
typedef struct _lv_theme_t lv_theme_t

Functions

lv_theme_t *lv_theme_get_from_obj(lv_obj_t *obj)

Get the theme assigned to the display of the object

Parameters

obj -- pointer to object

Returns

the theme of the object's display (can be NULL)

void lv_theme_apply(lv_obj_t *obj)

Apply the active theme on an object

Parameters

obj -- pointer to an object

void lv_theme_set_parent(lv_theme_t *new_theme, lv_theme_t *parent)

Set a base theme for a theme. The styles from the base them will be added before the styles of the current theme. Arbitrary long chain of themes can be created by setting base themes.

Parameters
  • new_theme -- pointer to theme which base should be set

  • parent -- pointer to the base theme

void lv_theme_set_apply_cb(lv_theme_t *theme, lv_theme_apply_cb_t apply_cb)

Set an apply callback for a theme. The apply callback is used to add styles to different objects

Parameters
  • theme -- pointer to theme which callback should be set

  • apply_cb -- pointer to the callback

const lv_font_t *lv_theme_get_font_small(lv_obj_t *obj)

Get the small font of the theme

Returns

pointer to the font

const lv_font_t *lv_theme_get_font_normal(lv_obj_t *obj)

Get the normal font of the theme

Returns

pointer to the font

const lv_font_t *lv_theme_get_font_large(lv_obj_t *obj)

Get the subtitle font of the theme

Returns

pointer to the font

lv_color_t lv_theme_get_color_primary(lv_obj_t *obj)

Get the primary color of the theme

Returns

the color

lv_color_t lv_theme_get_color_secondary(lv_obj_t *obj)

Get the secondary color of the theme

Returns

the color

struct _lv_theme_t

Public Members

lv_theme_apply_cb_t apply_cb
struct _lv_theme_t *parent

Apply the current theme's style on top of this theme.

void *user_data
struct _lv_disp_t *disp
lv_color_t color_primary
lv_color_t color_secondary
const lv_font_t *font_small
const lv_font_t *font_normal
const lv_font_t *font_large
uint32_t flags

Functions

static inline lv_coord_t lv_obj_get_style_width(const struct _lv_obj_t *obj, uint32_t part)
static inline lv_coord_t lv_obj_get_style_min_width(const struct _lv_obj_t *obj, uint32_t part)
static inline lv_coord_t lv_obj_get_style_max_width(const struct _lv_obj_t *obj, uint32_t part)
static inline lv_coord_t lv_obj_get_style_height(const struct _lv_obj_t *obj, uint32_t part)
static inline lv_coord_t lv_obj_get_style_min_height(const struct _lv_obj_t *obj, uint32_t part)
static inline lv_coord_t lv_obj_get_style_max_height(const struct _lv_obj_t *obj, uint32_t part)
static inline lv_coord_t lv_obj_get_style_x(const struct _lv_obj_t *obj, uint32_t part)
static inline lv_coord_t lv_obj_get_style_y(const struct _lv_obj_t *obj, uint32_t part)
static inline lv_align_t lv_obj_get_style_align(const struct _lv_obj_t *obj, uint32_t part)
static inline lv_coord_t lv_obj_get_style_transform_width(const struct _lv_obj_t *obj, uint32_t part)
static inline lv_coord_t lv_obj_get_style_transform_height(const struct _lv_obj_t *obj, uint32_t part)
static inline lv_coord_t lv_obj_get_style_translate_x(const struct _lv_obj_t *obj, uint32_t part)
static inline lv_coord_t lv_obj_get_style_translate_y(const struct _lv_obj_t *obj, uint32_t part)
static inline lv_coord_t lv_obj_get_style_transform_zoom(const struct _lv_obj_t *obj, uint32_t part)
static inline lv_coord_t lv_obj_get_style_transform_angle(const struct _lv_obj_t *obj, uint32_t part)
static inline lv_coord_t lv_obj_get_style_pad_top(const struct _lv_obj_t *obj, uint32_t part)
static inline lv_coord_t lv_obj_get_style_pad_bottom(const struct _lv_obj_t *obj, uint32_t part)
static inline lv_coord_t lv_obj_get_style_pad_left(const struct _lv_obj_t *obj, uint32_t part)
static inline lv_coord_t lv_obj_get_style_pad_right(const struct _lv_obj_t *obj, uint32_t part)
static inline lv_coord_t lv_obj_get_style_pad_row(const struct _lv_obj_t *obj, uint32_t part)
static inline lv_coord_t lv_obj_get_style_pad_column(const struct _lv_obj_t *obj, uint32_t part)
static inline lv_coord_t lv_obj_get_style_radius(const struct _lv_obj_t *obj, uint32_t part)
static inline bool lv_obj_get_style_clip_corner(const struct _lv_obj_t *obj, uint32_t part)
static inline lv_opa_t lv_obj_get_style_opa(const struct _lv_obj_t *obj, uint32_t part)
static inline const lv_color_filter_dsc_t *lv_obj_get_style_color_filter_dsc(const struct _lv_obj_t *obj, uint32_t part)
static inline lv_opa_t lv_obj_get_style_color_filter_opa(const struct _lv_obj_t *obj, uint32_t part)
static inline uint32_t lv_obj_get_style_anim_time(const struct _lv_obj_t *obj, uint32_t part)
static inline uint32_t lv_obj_get_style_anim_speed(const struct _lv_obj_t *obj, uint32_t part)
static inline const lv_style_transition_dsc_t *lv_obj_get_style_transition(const struct _lv_obj_t *obj, uint32_t part)
static inline lv_blend_mode_t lv_obj_get_style_blend_mode(const struct _lv_obj_t *obj, uint32_t part)
static inline uint16_t lv_obj_get_style_layout(const struct _lv_obj_t *obj, uint32_t part)
static inline lv_base_dir_t lv_obj_get_style_base_dir(const struct _lv_obj_t *obj, uint32_t part)
static inline lv_color_t lv_obj_get_style_bg_color(const struct _lv_obj_t *obj, uint32_t part)
static inline lv_color_t lv_obj_get_style_bg_color_filtered(const struct _lv_obj_t *obj, uint32_t part)
static inline lv_opa_t lv_obj_get_style_bg_opa(const struct _lv_obj_t *obj, uint32_t part)
static inline lv_color_t lv_obj_get_style_bg_grad_color(const struct _lv_obj_t *obj, uint32_t part)
static inline lv_color_t lv_obj_get_style_bg_grad_color_filtered(const struct _lv_obj_t *obj, uint32_t part)
static inline lv_grad_dir_t lv_obj_get_style_bg_grad_dir(const struct _lv_obj_t *obj, uint32_t part)
static inline lv_coord_t lv_obj_get_style_bg_main_stop(const struct _lv_obj_t *obj, uint32_t part)
static inline lv_coord_t lv_obj_get_style_bg_grad_stop(const struct _lv_obj_t *obj, uint32_t part)
static inline const void *lv_obj_get_style_bg_img_src(const struct _lv_obj_t *obj, uint32_t part)
static inline lv_opa_t lv_obj_get_style_bg_img_opa(const struct _lv_obj_t *obj, uint32_t part)
static inline lv_color_t lv_obj_get_style_bg_img_recolor(const struct _lv_obj_t *obj, uint32_t part)
static inline lv_color_t lv_obj_get_style_bg_img_recolor_filtered(const struct _lv_obj_t *obj, uint32_t part)
static inline lv_opa_t lv_obj_get_style_bg_img_recolor_opa(const struct _lv_obj_t *obj, uint32_t part)
static inline bool lv_obj_get_style_bg_img_tiled(const struct _lv_obj_t *obj, uint32_t part)
static inline lv_color_t lv_obj_get_style_border_color(const struct _lv_obj_t *obj, uint32_t part)
static inline lv_color_t lv_obj_get_style_border_color_filtered(const struct _lv_obj_t *obj, uint32_t part)
static inline lv_opa_t lv_obj_get_style_border_opa(const struct _lv_obj_t *obj, uint32_t part)
static inline lv_coord_t lv_obj_get_style_border_width(const struct _lv_obj_t *obj, uint32_t part)
static inline lv_border_side_t lv_obj_get_style_border_side(const struct _lv_obj_t *obj, uint32_t part)
static inline bool lv_obj_get_style_border_post(const struct _lv_obj_t *obj, uint32_t part)
static inline lv_color_t lv_obj_get_style_text_color(const struct _lv_obj_t *obj, uint32_t part)
static inline lv_color_t lv_obj_get_style_text_color_filtered(const struct _lv_obj_t *obj, uint32_t part)
static inline lv_opa_t lv_obj_get_style_text_opa(const struct _lv_obj_t *obj, uint32_t part)
static inline const lv_font_t *lv_obj_get_style_text_font(const struct _lv_obj_t *obj, uint32_t part)
static inline lv_coord_t lv_obj_get_style_text_letter_space(const struct _lv_obj_t *obj, uint32_t part)
static inline lv_coord_t lv_obj_get_style_text_line_space(const struct _lv_obj_t *obj, uint32_t part)
static inline lv_text_decor_t lv_obj_get_style_text_decor(const struct _lv_obj_t *obj, uint32_t part)
static inline lv_text_align_t lv_obj_get_style_text_align(const struct _lv_obj_t *obj, uint32_t part)
static inline lv_opa_t lv_obj_get_style_img_opa(const struct _lv_obj_t *obj, uint32_t part)
static inline lv_color_t lv_obj_get_style_img_recolor(const struct _lv_obj_t *obj, uint32_t part)
static inline lv_color_t lv_obj_get_style_img_recolor_filtered(const struct _lv_obj_t *obj, uint32_t part)
static inline lv_opa_t lv_obj_get_style_img_recolor_opa(const struct _lv_obj_t *obj, uint32_t part)
static inline lv_coord_t lv_obj_get_style_outline_width(const struct _lv_obj_t *obj, uint32_t part)
static inline lv_color_t lv_obj_get_style_outline_color(const struct _lv_obj_t *obj, uint32_t part)
static inline lv_color_t lv_obj_get_style_outline_color_filtered(const struct _lv_obj_t *obj, uint32_t part)
static inline lv_opa_t lv_obj_get_style_outline_opa(const struct _lv_obj_t *obj, uint32_t part)
static inline lv_coord_t lv_obj_get_style_outline_pad(const struct _lv_obj_t *obj, uint32_t part)
static inline lv_coord_t lv_obj_get_style_shadow_width(const struct _lv_obj_t *obj, uint32_t part)
static inline lv_coord_t lv_obj_get_style_shadow_ofs_x(const struct _lv_obj_t *obj, uint32_t part)
static inline lv_coord_t lv_obj_get_style_shadow_ofs_y(const struct _lv_obj_t *obj, uint32_t part)
static inline lv_coord_t lv_obj_get_style_shadow_spread(const struct _lv_obj_t *obj, uint32_t part)
static inline lv_color_t lv_obj_get_style_shadow_color(const struct _lv_obj_t *obj, uint32_t part)
static inline lv_color_t lv_obj_get_style_shadow_color_filtered(const struct _lv_obj_t *obj, uint32_t part)
static inline lv_opa_t lv_obj_get_style_shadow_opa(const struct _lv_obj_t *obj, uint32_t part)
static inline lv_coord_t lv_obj_get_style_line_width(const struct _lv_obj_t *obj, uint32_t part)
static inline lv_coord_t lv_obj_get_style_line_dash_width(const struct _lv_obj_t *obj, uint32_t part)
static inline lv_coord_t lv_obj_get_style_line_dash_gap(const struct _lv_obj_t *obj, uint32_t part)
static inline lv_coord_t lv_obj_get_style_line_rounded(const struct _lv_obj_t *obj, uint32_t part)
static inline lv_color_t lv_obj_get_style_line_color(const struct _lv_obj_t *obj, uint32_t part)
static inline lv_color_t lv_obj_get_style_line_color_filtered(const struct _lv_obj_t *obj, uint32_t part)
static inline lv_opa_t lv_obj_get_style_line_opa(const struct _lv_obj_t *obj, uint32_t part)
static inline lv_coord_t lv_obj_get_style_arc_width(const struct _lv_obj_t *obj, uint32_t part)
static inline lv_coord_t lv_obj_get_style_arc_rounded(const struct _lv_obj_t *obj, uint32_t part)
static inline lv_color_t lv_obj_get_style_arc_color(const struct _lv_obj_t *obj, uint32_t part)
static inline lv_color_t lv_obj_get_style_arc_color_filtered(const struct _lv_obj_t *obj, uint32_t part)
static inline lv_opa_t lv_obj_get_style_arc_opa(const struct _lv_obj_t *obj, uint32_t part)
static inline const void *lv_obj_get_style_arc_img_src(const struct _lv_obj_t *obj, uint32_t part)
void lv_obj_set_style_width(struct _lv_obj_t *obj, lv_coord_t value, lv_style_selector_t selector)
void lv_obj_set_style_min_width(struct _lv_obj_t *obj, lv_coord_t value, lv_style_selector_t selector)
void lv_obj_set_style_max_width(struct _lv_obj_t *obj, lv_coord_t value, lv_style_selector_t selector)
void lv_obj_set_style_height(struct _lv_obj_t *obj, lv_coord_t value, lv_style_selector_t selector)
void lv_obj_set_style_min_height(struct _lv_obj_t *obj, lv_coord_t value, lv_style_selector_t selector)
void lv_obj_set_style_max_height(struct _lv_obj_t *obj, lv_coord_t value, lv_style_selector_t selector)
void lv_obj_set_style_x(struct _lv_obj_t *obj, lv_coord_t value, lv_style_selector_t selector)
void lv_obj_set_style_y(struct _lv_obj_t *obj, lv_coord_t value, lv_style_selector_t selector)
void lv_obj_set_style_align(struct _lv_obj_t *obj, lv_align_t value, lv_style_selector_t selector)
void lv_obj_set_style_transform_width(struct _lv_obj_t *obj, lv_coord_t value, lv_style_selector_t selector)
void lv_obj_set_style_transform_height(struct _lv_obj_t *obj, lv_coord_t value, lv_style_selector_t selector)
void lv_obj_set_style_translate_x(struct _lv_obj_t *obj, lv_coord_t value, lv_style_selector_t selector)
void lv_obj_set_style_translate_y(struct _lv_obj_t *obj, lv_coord_t value, lv_style_selector_t selector)
void lv_obj_set_style_transform_zoom(struct _lv_obj_t *obj, lv_coord_t value, lv_style_selector_t selector)
void lv_obj_set_style_transform_angle(struct _lv_obj_t *obj, lv_coord_t value, lv_style_selector_t selector)
void lv_obj_set_style_pad_top(struct _lv_obj_t *obj, lv_coord_t value, lv_style_selector_t selector)
void lv_obj_set_style_pad_bottom(struct _lv_obj_t *obj, lv_coord_t value, lv_style_selector_t selector)
void lv_obj_set_style_pad_left(struct _lv_obj_t *obj, lv_coord_t value, lv_style_selector_t selector)
void lv_obj_set_style_pad_right(struct _lv_obj_t *obj, lv_coord_t value, lv_style_selector_t selector)
void lv_obj_set_style_pad_row(struct _lv_obj_t *obj, lv_coord_t value, lv_style_selector_t selector)
void lv_obj_set_style_pad_column(struct _lv_obj_t *obj, lv_coord_t value, lv_style_selector_t selector)
void lv_obj_set_style_radius(struct _lv_obj_t *obj, lv_coord_t value, lv_style_selector_t selector)
void lv_obj_set_style_clip_corner(struct _lv_obj_t *obj, bool value, lv_style_selector_t selector)
void lv_obj_set_style_opa(struct _lv_obj_t *obj, lv_opa_t value, lv_style_selector_t selector)
void lv_obj_set_style_color_filter_dsc(struct _lv_obj_t *obj, const lv_color_filter_dsc_t *value, lv_style_selector_t selector)
void lv_obj_set_style_color_filter_opa(struct _lv_obj_t *obj, lv_opa_t value, lv_style_selector_t selector)
void lv_obj_set_style_anim_time(struct _lv_obj_t *obj, uint32_t value, lv_style_selector_t selector)
void lv_obj_set_style_anim_speed(struct _lv_obj_t *obj, uint32_t value, lv_style_selector_t selector)
void lv_obj_set_style_transition(struct _lv_obj_t *obj, const lv_style_transition_dsc_t *value, lv_style_selector_t selector)
void lv_obj_set_style_blend_mode(struct _lv_obj_t *obj, lv_blend_mode_t value, lv_style_selector_t selector)
void lv_obj_set_style_layout(struct _lv_obj_t *obj, uint16_t value, lv_style_selector_t selector)
void lv_obj_set_style_base_dir(struct _lv_obj_t *obj, lv_base_dir_t value, lv_style_selector_t selector)
void lv_obj_set_style_bg_color(struct _lv_obj_t *obj, lv_color_t value, lv_style_selector_t selector)
void lv_obj_set_style_bg_color_filtered(struct _lv_obj_t *obj, lv_color_t value, lv_style_selector_t selector)
void lv_obj_set_style_bg_opa(struct _lv_obj_t *obj, lv_opa_t value, lv_style_selector_t selector)
void lv_obj_set_style_bg_grad_color(struct _lv_obj_t *obj, lv_color_t value, lv_style_selector_t selector)
void lv_obj_set_style_bg_grad_color_filtered(struct _lv_obj_t *obj, lv_color_t value, lv_style_selector_t selector)
void lv_obj_set_style_bg_grad_dir(struct _lv_obj_t *obj, lv_grad_dir_t value, lv_style_selector_t selector)
void lv_obj_set_style_bg_main_stop(struct _lv_obj_t *obj, lv_coord_t value, lv_style_selector_t selector)
void lv_obj_set_style_bg_grad_stop(struct _lv_obj_t *obj, lv_coord_t value, lv_style_selector_t selector)
void lv_obj_set_style_bg_img_src(struct _lv_obj_t *obj, const void *value, lv_style_selector_t selector)
void lv_obj_set_style_bg_img_opa(struct _lv_obj_t *obj, lv_opa_t value, lv_style_selector_t selector)
void lv_obj_set_style_bg_img_recolor(struct _lv_obj_t *obj, lv_color_t value, lv_style_selector_t selector)
void lv_obj_set_style_bg_img_recolor_filtered(struct _lv_obj_t *obj, lv_color_t value, lv_style_selector_t selector)
void lv_obj_set_style_bg_img_recolor_opa(struct _lv_obj_t *obj, lv_opa_t value, lv_style_selector_t selector)
void lv_obj_set_style_bg_img_tiled(struct _lv_obj_t *obj, bool value, lv_style_selector_t selector)
void lv_obj_set_style_border_color(struct _lv_obj_t *obj, lv_color_t value, lv_style_selector_t selector)
void lv_obj_set_style_border_color_filtered(struct _lv_obj_t *obj, lv_color_t value, lv_style_selector_t selector)
void lv_obj_set_style_border_opa(struct _lv_obj_t *obj, lv_opa_t value, lv_style_selector_t selector)
void lv_obj_set_style_border_width(struct _lv_obj_t *obj, lv_coord_t value, lv_style_selector_t selector)
void lv_obj_set_style_border_side(struct _lv_obj_t *obj, lv_border_side_t value, lv_style_selector_t selector)
void lv_obj_set_style_border_post(struct _lv_obj_t *obj, bool value, lv_style_selector_t selector)
void lv_obj_set_style_text_color(struct _lv_obj_t *obj, lv_color_t value, lv_style_selector_t selector)
void lv_obj_set_style_text_color_filtered(struct _lv_obj_t *obj, lv_color_t value, lv_style_selector_t selector)
void lv_obj_set_style_text_opa(struct _lv_obj_t *obj, lv_opa_t value, lv_style_selector_t selector)
void lv_obj_set_style_text_font(struct _lv_obj_t *obj, const lv_font_t *value, lv_style_selector_t selector)
void lv_obj_set_style_text_letter_space(struct _lv_obj_t *obj, lv_coord_t value, lv_style_selector_t selector)
void lv_obj_set_style_text_line_space(struct _lv_obj_t *obj, lv_coord_t value, lv_style_selector_t selector)
void lv_obj_set_style_text_decor(struct _lv_obj_t *obj, lv_text_decor_t value, lv_style_selector_t selector)
void lv_obj_set_style_text_align(struct _lv_obj_t *obj, lv_text_align_t value, lv_style_selector_t selector)
void lv_obj_set_style_img_opa(struct _lv_obj_t *obj, lv_opa_t value, lv_style_selector_t selector)
void lv_obj_set_style_img_recolor(struct _lv_obj_t *obj, lv_color_t value, lv_style_selector_t selector)
void lv_obj_set_style_img_recolor_filtered(struct _lv_obj_t *obj, lv_color_t value, lv_style_selector_t selector)
void lv_obj_set_style_img_recolor_opa(struct _lv_obj_t *obj, lv_opa_t value, lv_style_selector_t selector)
void lv_obj_set_style_outline_width(struct _lv_obj_t *obj, lv_coord_t value, lv_style_selector_t selector)
void lv_obj_set_style_outline_color(struct _lv_obj_t *obj, lv_color_t value, lv_style_selector_t selector)
void lv_obj_set_style_outline_color_filtered(struct _lv_obj_t *obj, lv_color_t value, lv_style_selector_t selector)
void lv_obj_set_style_outline_opa(struct _lv_obj_t *obj, lv_opa_t value, lv_style_selector_t selector)
void lv_obj_set_style_outline_pad(struct _lv_obj_t *obj, lv_coord_t value, lv_style_selector_t selector)
void lv_obj_set_style_shadow_width(struct _lv_obj_t *obj, lv_coord_t value, lv_style_selector_t selector)
void lv_obj_set_style_shadow_ofs_x(struct _lv_obj_t *obj, lv_coord_t value, lv_style_selector_t selector)
void lv_obj_set_style_shadow_ofs_y(struct _lv_obj_t *obj, lv_coord_t value, lv_style_selector_t selector)
void lv_obj_set_style_shadow_spread(struct _lv_obj_t *obj, lv_coord_t value, lv_style_selector_t selector)
void lv_obj_set_style_shadow_color(struct _lv_obj_t *obj, lv_color_t value, lv_style_selector_t selector)
void lv_obj_set_style_shadow_color_filtered(struct _lv_obj_t *obj, lv_color_t value, lv_style_selector_t selector)
void lv_obj_set_style_shadow_opa(struct _lv_obj_t *obj, lv_opa_t value, lv_style_selector_t selector)
void lv_obj_set_style_line_width(struct _lv_obj_t *obj, lv_coord_t value, lv_style_selector_t selector)
void lv_obj_set_style_line_dash_width(struct _lv_obj_t *obj, lv_coord_t value, lv_style_selector_t selector)
void lv_obj_set_style_line_dash_gap(struct _lv_obj_t *obj, lv_coord_t value, lv_style_selector_t selector)
void lv_obj_set_style_line_rounded(struct _lv_obj_t *obj, lv_coord_t value, lv_style_selector_t selector)
void lv_obj_set_style_line_color(struct _lv_obj_t *obj, lv_color_t value, lv_style_selector_t selector)
void lv_obj_set_style_line_color_filtered(struct _lv_obj_t *obj, lv_color_t value, lv_style_selector_t selector)
void lv_obj_set_style_line_opa(struct _lv_obj_t *obj, lv_opa_t value, lv_style_selector_t selector)
void lv_obj_set_style_arc_width(struct _lv_obj_t *obj, lv_coord_t value, lv_style_selector_t selector)
void lv_obj_set_style_arc_rounded(struct _lv_obj_t *obj, lv_coord_t value, lv_style_selector_t selector)
void lv_obj_set_style_arc_color(struct _lv_obj_t *obj, lv_color_t value, lv_style_selector_t selector)
void lv_obj_set_style_arc_color_filtered(struct _lv_obj_t *obj, lv_color_t value, lv_style_selector_t selector)
void lv_obj_set_style_arc_opa(struct _lv_obj_t *obj, lv_opa_t value, lv_style_selector_t selector)
void lv_obj_set_style_arc_img_src(struct _lv_obj_t *obj, const void *value, lv_style_selector_t selector)

Functions

void lv_style_set_width(lv_style_t *style, lv_coord_t value)
void lv_style_set_min_width(lv_style_t *style, lv_coord_t value)
void lv_style_set_max_width(lv_style_t *style, lv_coord_t value)
void lv_style_set_height(lv_style_t *style, lv_coord_t value)
void lv_style_set_min_height(lv_style_t *style, lv_coord_t value)
void lv_style_set_max_height(lv_style_t *style, lv_coord_t value)
void lv_style_set_x(lv_style_t *style, lv_coord_t value)
void lv_style_set_y(lv_style_t *style, lv_coord_t value)
void lv_style_set_align(lv_style_t *style, lv_align_t value)
void lv_style_set_transform_width(lv_style_t *style, lv_coord_t value)
void lv_style_set_transform_height(lv_style_t *style, lv_coord_t value)
void lv_style_set_translate_x(lv_style_t *style, lv_coord_t value)
void lv_style_set_translate_y(lv_style_t *style, lv_coord_t value)
void lv_style_set_transform_zoom(lv_style_t *style, lv_coord_t value)
void lv_style_set_transform_angle(lv_style_t *style, lv_coord_t value)
void lv_style_set_pad_top(lv_style_t *style, lv_coord_t value)
void lv_style_set_pad_bottom(lv_style_t *style, lv_coord_t value)
void lv_style_set_pad_left(lv_style_t *style, lv_coord_t value)
void lv_style_set_pad_right(lv_style_t *style, lv_coord_t value)
void lv_style_set_pad_row(lv_style_t *style, lv_coord_t value)
void lv_style_set_pad_column(lv_style_t *style, lv_coord_t value)
void lv_style_set_radius(lv_style_t *style, lv_coord_t value)
void lv_style_set_clip_corner(lv_style_t *style, bool value)
void lv_style_set_opa(lv_style_t *style, lv_opa_t value)
void lv_style_set_color_filter_dsc(lv_style_t *style, const lv_color_filter_dsc_t *value)
void lv_style_set_color_filter_opa(lv_style_t *style, lv_opa_t value)
void lv_style_set_anim_time(lv_style_t *style, uint32_t value)
void lv_style_set_anim_speed(lv_style_t *style, uint32_t value)
void lv_style_set_transition(lv_style_t *style, const lv_style_transition_dsc_t *value)
void lv_style_set_blend_mode(lv_style_t *style, lv_blend_mode_t value)
void lv_style_set_layout(lv_style_t *style, uint16_t value)
void lv_style_set_base_dir(lv_style_t *style, lv_base_dir_t value)
void lv_style_set_bg_color(lv_style_t *style, lv_color_t value)
void lv_style_set_bg_color_filtered(lv_style_t *style, lv_color_t value)
void lv_style_set_bg_opa(lv_style_t *style, lv_opa_t value)
void lv_style_set_bg_grad_color(lv_style_t *style, lv_color_t value)
void lv_style_set_bg_grad_color_filtered(lv_style_t *style, lv_color_t value)
void lv_style_set_bg_grad_dir(lv_style_t *style, lv_grad_dir_t value)
void lv_style_set_bg_main_stop(lv_style_t *style, lv_coord_t value)
void lv_style_set_bg_grad_stop(lv_style_t *style, lv_coord_t value)
void lv_style_set_bg_img_src(lv_style_t *style, const void *value)
void lv_style_set_bg_img_opa(lv_style_t *style, lv_opa_t value)
void lv_style_set_bg_img_recolor(lv_style_t *style, lv_color_t value)
void lv_style_set_bg_img_recolor_filtered(lv_style_t *style, lv_color_t value)
void lv_style_set_bg_img_recolor_opa(lv_style_t *style, lv_opa_t value)
void lv_style_set_bg_img_tiled(lv_style_t *style, bool value)
void lv_style_set_border_color(lv_style_t *style, lv_color_t value)
void lv_style_set_border_color_filtered(lv_style_t *style, lv_color_t value)
void lv_style_set_border_opa(lv_style_t *style, lv_opa_t value)
void lv_style_set_border_width(lv_style_t *style, lv_coord_t value)
void lv_style_set_border_side(lv_style_t *style, lv_border_side_t value)
void lv_style_set_border_post(lv_style_t *style, bool value)
void lv_style_set_text_color(lv_style_t *style, lv_color_t value)
void lv_style_set_text_color_filtered(lv_style_t *style, lv_color_t value)
void lv_style_set_text_opa(lv_style_t *style, lv_opa_t value)
void lv_style_set_text_font(lv_style_t *style, const lv_font_t *value)
void lv_style_set_text_letter_space(lv_style_t *style, lv_coord_t value)
void lv_style_set_text_line_space(lv_style_t *style, lv_coord_t value)
void lv_style_set_text_decor(lv_style_t *style, lv_text_decor_t value)
void lv_style_set_text_align(lv_style_t *style, lv_text_align_t value)
void lv_style_set_img_opa(lv_style_t *style, lv_opa_t value)
void lv_style_set_img_recolor(lv_style_t *style, lv_color_t value)
void lv_style_set_img_recolor_filtered(lv_style_t *style, lv_color_t value)
void lv_style_set_img_recolor_opa(lv_style_t *style, lv_opa_t value)
void lv_style_set_outline_width(lv_style_t *style, lv_coord_t value)
void lv_style_set_outline_color(lv_style_t *style, lv_color_t value)
void lv_style_set_outline_color_filtered(lv_style_t *style, lv_color_t value)
void lv_style_set_outline_opa(lv_style_t *style, lv_opa_t value)
void lv_style_set_outline_pad(lv_style_t *style, lv_coord_t value)
void lv_style_set_shadow_width(lv_style_t *style, lv_coord_t value)
void lv_style_set_shadow_ofs_x(lv_style_t *style, lv_coord_t value)
void lv_style_set_shadow_ofs_y(lv_style_t *style, lv_coord_t value)
void lv_style_set_shadow_spread(lv_style_t *style, lv_coord_t value)
void lv_style_set_shadow_color(lv_style_t *style, lv_color_t value)
void lv_style_set_shadow_color_filtered(lv_style_t *style, lv_color_t value)
void lv_style_set_shadow_opa(lv_style_t *style, lv_opa_t value)
void lv_style_set_line_width(lv_style_t *style, lv_coord_t value)
void lv_style_set_line_dash_width(lv_style_t *style, lv_coord_t value)
void lv_style_set_line_dash_gap(lv_style_t *style, lv_coord_t value)
void lv_style_set_line_rounded(lv_style_t *style, lv_coord_t value)
void lv_style_set_line_color(lv_style_t *style, lv_color_t value)
void lv_style_set_line_color_filtered(lv_style_t *style, lv_color_t value)
void lv_style_set_line_opa(lv_style_t *style, lv_opa_t value)
void lv_style_set_arc_width(lv_style_t *style, lv_coord_t value)
void lv_style_set_arc_rounded(lv_style_t *style, lv_coord_t value)
void lv_style_set_arc_color(lv_style_t *style, lv_color_t value)
void lv_style_set_arc_color_filtered(lv_style_t *style, lv_color_t value)
void lv_style_set_arc_opa(lv_style_t *style, lv_opa_t value)
void lv_style_set_arc_img_src(lv_style_t *style, const void *value)