Style Properties

Sets width of Widget. Pixel, percentage and LV_SIZE_CONTENT values can be used. Percentage values are relative to the width of the parent's content area.

Sets a minimal width. Pixel and percentage values can be used. Percentage values are relative to the width of the parent's content area.

Sets a maximal width. Pixel and percentage values can be used. Percentage values are relative to the width of the parent's content area.

Sets height of Widget. Pixel, percentage and LV_SIZE_CONTENT can be used. Percentage values are relative to the height of the parent's content area.

Sets a minimal height. Pixel and percentage values can be used. Percentage values are relative to the height of the parent's content area.

Sets a maximal height. Pixel and percentage values can be used. Percentage values are relative to the height of the parent's content area.

Its meaning depends on the type of Widget. For example in case of lv_scale it means the length of the ticks.

Set the alignment which tells from which point of the parent the X and Y coordinates should be interpreted. Possible values are: LV_ALIGN_DEFAULT, LV_ALIGN_TOP_LEFT/MID/RIGHT, LV_ALIGN_BOTTOM_LEFT/MID/RIGHT, LV_ALIGN_LEFT/RIGHT_MID, LV_ALIGN_CENTER. LV_ALIGN_DEFAULT means LV_ALIGN_TOP_LEFT with LTR base direction and LV_ALIGN_TOP_RIGHT with RTL base direction.

Make Widget wider on both sides with this value. Pixel and percentage (with lv_pct(x)) values can be used. Percentage values are relative to Widget's width.

Make Widget higher on both sides with this value. Pixel and percentage (with lv_pct(x)) values can be used. Percentage values are relative to Widget's height.

Move Widget with this value in X direction. Applied after layouts, aligns and other positioning. Pixel and percentage (with lv_pct(x)) values can be used. Percentage values are relative to Widget's width.

Move Widget with this value in Y direction. Applied after layouts, aligns and other positioning. Pixel and percentage (with lv_pct(x)) values can be used. Percentage values are relative to Widget's height.

Move object around the centre of the parent object (e.g. around the circumference of a scale).

Zoom Widget horizontally. The value 256 (or LV_SCALE_NONE) means normal size, 128 half size, 512 double size, and so on.

Zoom Widget vertically. The value 256 (or LV_SCALE_NONE) means normal size, 128 half size, 512 double size, and so on.

Rotate Widget. The value is interpreted in 0.1 degree units. E.g. 450 means 45 deg.

Set pivot point's X coordinate for transformations. Relative to Widget's top left corner.

Set pivot point's Y coordinate for transformations. Relative to Widget's top left corner.

Skew Widget horizontally. The value is interpreted in 0.1 degree units. E.g. 450 means 45 deg.

Skew Widget vertically. The value is interpreted in 0.1 degree units. E.g. 450 means 45 deg.

Sets the padding on the top. It makes the content area smaller in this direction.

Sets the padding on the bottom. It makes the content area smaller in this direction.

Sets the padding on the left. It makes the content area smaller in this direction.

Sets the padding on the right. It makes the content area smaller in this direction.

Sets the padding between the rows. Used by the layouts.

Sets the padding between the columns. Used by the layouts.

Pad text labels away from the scale ticks/remainder of the LV_PART_.

Sets margin on the top. Widget will keep this space from its siblings in layouts.

Sets margin on the bottom. Widget will keep this space from its siblings in layouts.

Sets margin on the left. Widget will keep this space from its siblings in layouts.

Sets margin on the right. Widget will keep this space from its siblings in layouts.

Set background color of Widget.

Set opacity of the background. Value 0, LV_OPA_0 or LV_OPA_TRANSP means fully transparent, 255, LV_OPA_100 or LV_OPA_COVER means fully covering, other values or LV_OPA_10, LV_OPA_20, etc means semi transparency.

Set gradient color of the background. Used only if grad_dir is not LV_GRAD_DIR_NONE.

Set direction of the gradient of the background. Possible values are LV_GRAD_DIR_NONE/HOR/VER.

Set point from which background color should start for gradients. 0 means to top/left side, 255 the bottom/right side, 128 the center, and so on.

Set point from which background's gradient color should start. 0 means to top/left side, 255 the bottom/right side, 128 the center, and so on.

Set opacity of the first gradient color.

Set opacity of the second gradient color.

Set gradient definition. The pointed instance must exist while Widget is alive. NULL to disable. It wraps BG_GRAD_COLOR, BG_GRAD_DIR, BG_MAIN_STOP and BG_GRAD_STOP into one descriptor and allows creating gradients with more colors as well. If it's set other gradient related properties will be ignored.

Set a background image. Can be a pointer to lv_image_dsc_t, a path to a file or an LV_SYMBOL_....

Set opacity of the background image. Value 0, LV_OPA_0 or LV_OPA_TRANSP means fully transparent, 255, LV_OPA_100 or LV_OPA_COVER means fully covering, other values or LV_OPA_10, LV_OPA_20, etc means semi transparency.

Set a color to mix to the background image.

Set intensity of background image recoloring. Value 0, LV_OPA_0 or LV_OPA_TRANSP means no mixing, 255, LV_OPA_100 or LV_OPA_COVER means full recoloring, other values or LV_OPA_10, LV_OPA_20, etc are interpreted proportionally.

If enabled the background image will be tiled. Possible values are true or false.

Set color of the border.

Set opacity of the border. Value 0, LV_OPA_0 or LV_OPA_TRANSP means fully transparent, 255, LV_OPA_100 or LV_OPA_COVER means fully covering, other values or LV_OPA_10, LV_OPA_20, etc means semi transparency.

Set width of the border. Only pixel values can be used.

Set only which side(s) the border should be drawn. Possible values are LV_BORDER_SIDE_NONE/TOP/BOTTOM/LEFT/RIGHT/INTERNAL. OR-ed values can be used as well, e.g. LV_BORDER_SIDE_TOP | LV_BORDER_SIDE_LEFT.

Sets whether the border should be drawn before or after the children are drawn. true: after children, false: before children.

Set width of outline in pixels.

Set color of outline.

Set opacity of outline. Value 0, LV_OPA_0 or LV_OPA_TRANSP means fully transparent, 255, LV_OPA_100 or LV_OPA_COVER means fully covering, other values or LV_OPA_10, LV_OPA_20, etc means semi transparency.

Set padding of outline, i.e. the gap between Widget and the outline.

Set width of the shadow in pixels. The value should be >= 0.

Set an offset on the shadow in pixels in X direction.

Set an offset on the shadow in pixels in Y direction.

Make shadow calculation to use a larger or smaller rectangle as base. The value can be in pixels to make the area larger/smaller.

Set color of shadow.

Set opacity of shadow. Value 0, LV_OPA_0 or LV_OPA_TRANSP means fully transparent, 255, LV_OPA_100 or LV_OPA_COVER means fully covering, other values or LV_OPA_10, LV_OPA_20, etc means semi transparency.

Set opacity of an image. Value 0, LV_OPA_0 or LV_OPA_TRANSP means fully transparent, 255, LV_OPA_100 or LV_OPA_COVER means fully covering, other values or LV_OPA_10, LV_OPA_20, etc means semi transparency.

Set color to mix with the image.

Set intensity of color mixing. Value 0, LV_OPA_0 or LV_OPA_TRANSP means fully transparent, 255, LV_OPA_100 or LV_OPA_COVER means fully covering, other values or LV_OPA_10, LV_OPA_20, etc means semi transparency.

Set image colorkey definition. The lv_image_colorkey_t contains two color values: high_color and low_color. the color of pixels ranging from low_color to high_color will be transparent.

Set width of lines in pixels.

Set width of dashes in pixels. Note that dash works only on horizontal and vertical lines.

Set gap between dashes in pixels. Note that dash works only on horizontal and vertical lines.

Make end points of the lines rounded. true: rounded, false: perpendicular line ending.

Set color of lines.

Set opacity of lines.

Set width (thickness) of arcs in pixels.

Make end points of arcs rounded. true: rounded, false: perpendicular line ending.

Set color of arc.

Set opacity of arcs.

Set an image from which arc will be masked out. It's useful to display complex effects on the arcs. Can be a pointer to lv_image_dsc_t or a path to a file.

Sets color of text.

Set opacity of text. Value 0, LV_OPA_0 or LV_OPA_TRANSP means fully transparent, 255, LV_OPA_100 or LV_OPA_COVER means fully covering, other values or LV_OPA_10, LV_OPA_20, etc means semi transparency.

Set font of text (a pointer lv_font_t *).

Set letter space in pixels.

Set line space in pixels.

Set decoration for the text. Possible values are LV_TEXT_DECOR_NONE/UNDERLINE/STRIKETHROUGH. OR-ed values can be used as well.

Set how to align the lines of the text. Note that it doesn't align the Widget itself, only the lines inside the Widget. Possible values are LV_TEXT_ALIGN_LEFT/CENTER/RIGHT/AUTO. LV_TEXT_ALIGN_AUTO detect the text base direction and uses left or right alignment accordingly.

Sets the color of letter outline stroke.

Set the letter outline stroke width in pixels.

Set the opacity of the letter outline stroke. Value 0, LV_OPA_0 or LV_OPA_TRANSP means fully transparent, 255, LV_OPA_100 or LV_OPA_COVER means fully covering, other values or LV_OPA_10, LV_OPA_20, etc means semi transparency.

Set the text leading trim mode. Removes empty space above and/or below text based on font metrics (cap-height, x-height, baseline). Similar to CSS text-box-trim. Possible values are LV_TEXT_LEADING_TRIM_NONE/CAPITAL_BASELINE/LOWER_BASELINE/CAPITAL/LOWER.

Sets the intensity of blurring. Applied on each lv_part separately before the children are rendered.

If true the background of the widget will be blurred. The part should have < 100% opacity to make it visible. If false the given part will be blurred when it's rendered but before drawing the children.

Setting to LV_BLUR_QUALITY_SPEED the blurring algorithm will prefer speed over quality. LV_BLUR_QUALITY_PRECISION will force using higher quality but slower blur. With LV_BLUR_QUALITY_AUTO the quality will be selected automatically.

Sets the intensity of blurring. Applied on each lv_part separately before the children are rendered.

Set an offset on the shadow in pixels in X direction.

Set an offset on the shadow in pixels in Y direction.

Set the color of the shadow.

Set the opacity of the shadow.

Setting to LV_BLUR_QUALITY_SPEED the blurring algorithm will prefer speed over quality. LV_BLUR_QUALITY_PRECISION will force using higher quality but slower blur. With LV_BLUR_QUALITY_AUTO the quality will be selected automatically.

Set radius on every corner. The value is interpreted in pixels (>= 0) or LV_RADIUS_CIRCLE for max radius.

Move start point of object (e.g. scale tick) radially.

Enable clipping of content that overflows rounded corners of parent Widget. Can be true or false.

Scale down all opacity values of the Widget by this factor. Value 0, LV_OPA_0 or LV_OPA_TRANSP means fully transparent, 255, LV_OPA_100 or LV_OPA_COVER means fully covering, other values or LV_OPA_10, LV_OPA_20, etc means semi transparency.

First draw Widget on the layer, then scale down layer opacity factor. Value 0, LV_OPA_0 or LV_OPA_TRANSP means fully transparent, 255, LV_OPA_100 or LV_OPA_COVER means fully covering, other values or LV_OPA_10, LV_OPA_20, etc means semi transparency.

Mix a color with all colors of the Widget.

The intensity of mixing of color filter.

Set a color to mix to the obj.

Sets the intensity of color mixing. Value 0, LV_OPA_0 or LV_OPA_TRANSP means fully transparent. A value of 255, LV_OPA_100 or LV_OPA_COVER means fully opaque. Intermediate values like LV_OPA_10, LV_OPA_20, etc result in semi-transparency.

Animation template for Widget's animation. Should be a pointer to lv_anim_t. The animation parameters are widget specific, e.g. animation time could be the E.g. blink time of the cursor on the Text Area or scroll time of a roller. See Widgets' documentation to learn more.

Animation duration in milliseconds. Its meaning is widget specific. E.g. blink time of the cursor on the Text Area or scroll time of a roller. See Widgets' documentation to learn more.

An initialized lv_style_transition_dsc_t to describe a transition.

Describes how to blend the colors to the background. Possible values are LV_BLEND_MODE_NORMAL/ADDITIVE/SUBTRACTIVE/MULTIPLY/DIFFERENCE.

Set layout of Widget. Children will be repositioned and resized according to policies set for the layout. For possible values see documentation of the layouts.

Set base direction of Widget. Possible values are LV_BIDI_DIR_LTR/RTL/AUTO.

If set, a layer will be created for the widget and the layer will be masked with this A8 bitmap mask.

Adjust sensitivity for rotary encoders in 1/256 unit. It means, 128: slow down the rotary to half, 512: speeds up to double, 256: no change.

Defines in which direction the flex layout should arrange the children.

Defines how to align the children in the direction of flex flow.

Defines how to align the children perpendicular to the direction of flex flow.

Defines how to align the tracks of the flow.

Defines how much space to take proportionally from the free space of the Widget's track.

An array to describe the columns of the grid. Should be LV_GRID_TEMPLATE_LAST terminated.

Defines how to distribute the columns.

An array to describe the rows of the grid. Should be LV_GRID_TEMPLATE_LAST terminated.

Defines how to distribute the rows.

Set column in which Widget should be placed.

Set how to align Widget horizontally.

Set how many columns Widget should span. Needs to be >= 1.

Set row in which Widget should be placed.

Set how to align Widget vertically.

Set how many rows Widget should span. Needs to be >= 1.