253 lines
17 KiB
Markdown
253 lines
17 KiB
Markdown
|
Title: GTK CSS Properties
|
||
|
|
Slug: css-properties
|
||
|
|
|
||
|
|
GTK supports CSS properties and shorthands as far as they can be applied
|
||
|
|
in the context of widgets, and adds its own properties only when needed.
|
||
|
|
All GTK-specific properties have a -gtk prefix.
|
||
|
|
|
||
|
|
## Basic types
|
||
|
|
|
||
|
|
All properties support the following keywords: inherit, initial, unset,
|
||
|
|
with the same meaning as defined in the
|
||
|
|
[CSS Cascading and Inheritance](https://www.w3.org/TR/css3-cascade/#defaulting-keywords)
|
||
|
|
spec.
|
||
|
|
|
||
|
|
The following units are supported for basic datatypes:
|
||
|
|
|
||
|
|
Length
|
||
|
|
: px, pt, em, ex, rem, pc, in, cm, mm, calc()
|
||
|
|
|
||
|
|
Percentage
|
||
|
|
: %, calc()
|
||
|
|
|
||
|
|
Angle
|
||
|
|
: deg, grad, turn, calc()
|
||
|
|
|
||
|
|
Time
|
||
|
|
: s, ms, calc()
|
||
|
|
|
||
|
|
Length values with the em or ex units are resolved using the font
|
||
|
|
size value, unless they occur in setting the font-size itself, in
|
||
|
|
which case they are resolved using the inherited font size value.
|
||
|
|
|
||
|
|
The rem unit is resolved using the initial font size value, which is
|
||
|
|
not quite the same as the CSS definition of rem.
|
||
|
|
|
||
|
|
The calc() notation adds considerable expressive power. There are limits
|
||
|
|
on what types can be combined in such an expression (e.g. it does not make
|
||
|
|
sense to add a number and a time). For the full details, see the
|
||
|
|
[CSS3 Values and Units](https://www.w3.org/TR/css3-values/#calc-notation)
|
||
|
|
spec.
|
||
|
|
|
||
|
|
A common pattern among shorthand properties (called 'four sides') is one
|
||
|
|
where one to four values can be specified, to determine a value for each
|
||
|
|
side of an area. In this case, the specified values are interpreted as
|
||
|
|
follows:
|
||
|
|
|
||
|
|
4 values:
|
||
|
|
: top right bottom left
|
||
|
|
|
||
|
|
3 values:
|
||
|
|
: top horizontal bottom
|
||
|
|
|
||
|
|
2 values:
|
||
|
|
: vertical horizontal
|
||
|
|
|
||
|
|
1 value:
|
||
|
|
: all
|
||
|
|
|
||
|
|
## Colors
|
||
|
|
|
||
|
|
GTK extends the CSS syntax with several additional ways to specify colors.
|
||
|
|
|
||
|
|
The first is a reference to a color defined via a @define-color rule in CSS.
|
||
|
|
The syntax for @define-color rules is as follows:
|
||
|
|
|
||
|
|
```
|
||
|
|
@define-color Name Color
|
||
|
|
```
|
||
|
|
|
||
|
|
To refer to the color defined by a @define-color rule, prefix the name with @.
|
||
|
|
|
||
|
|
GTK also supports color expressions, which allow colors to be transformed to
|
||
|
|
new ones. Color expressions can be nested, providing a rich language to
|
||
|
|
define colors. Color expressions resemble functions, taking 1 or more colors
|
||
|
|
and in some cases a number as arguments.
|
||
|
|
|
||
|
|
`lighter(Color)`
|
||
|
|
: produces a brigher variant of Color
|
||
|
|
|
||
|
|
`darker(Color)`
|
||
|
|
: produces a darker variant of Color
|
||
|
|
|
||
|
|
`shade(Color, Number)`
|
||
|
|
: changes the lightness of Color. The number ranges from 0 for black to 2 for white.
|
||
|
|
|
||
|
|
`alpha(Color, Number)`
|
||
|
|
: replaces the alpha value of color with number (between 0 and 1)
|
||
|
|
|
||
|
|
`mix(Color1, Color2, Number)`
|
||
|
|
: interpolates between the two colors
|
||
|
|
|
||
|
|
## Images
|
||
|
|
|
||
|
|
GTK extends the CSS syntax for images and also uses it for specifying icons.
|
||
|
|
To load a themed icon, use
|
||
|
|
|
||
|
|
```
|
||
|
|
-gtk-icontheme(Name)
|
||
|
|
```
|
||
|
|
|
||
|
|
The specified icon name is used to look up a themed icon, while taking into
|
||
|
|
account the values of the -gtk-icon-palette property. This kind of image is
|
||
|
|
mainly used as value of the -gtk-icon-source property.
|
||
|
|
|
||
|
|
Symbolic icons from the icon theme are recolored according to the
|
||
|
|
-gtk-icon-palette property, which defines a list of named colors.
|
||
|
|
The recognized names for colors in symbolic icons are error, warning
|
||
|
|
and success. The default palette maps these three names to symbolic
|
||
|
|
colors with the names @error_color, @warning_color and @success_color
|
||
|
|
respectively. The syntax for defining a custom palette is a comma-separated
|
||
|
|
list of name-color pairs, e.g.
|
||
|
|
|
||
|
|
```
|
||
|
|
success blue, warning #fc3, error magenta
|
||
|
|
```
|
||
|
|
|
||
|
|
Recoloring is sometimes needed for images that are not part of an icon theme,
|
||
|
|
and the
|
||
|
|
|
||
|
|
```
|
||
|
|
-gtk-recolor(uri, palette)
|
||
|
|
```
|
||
|
|
|
||
|
|
syntax makes this available. -gtk-recolor requires a url as first argument.
|
||
|
|
The remaining arguments specify the color palette to use. If the palette is
|
||
|
|
not explicitly specified, the current value of the -gtk-icon-palette property
|
||
|
|
is used.
|
||
|
|
|
||
|
|
GTK supports scaled rendering on hi-resolution displays. This works best if
|
||
|
|
images can specify normal and hi-resolution variants. From CSS, this can be
|
||
|
|
done with
|
||
|
|
|
||
|
|
```
|
||
|
|
-gtk-scaled(Image1, Image2)
|
||
|
|
```
|
||
|
|
|
||
|
|
## GTK CSS Properties
|
||
|
|
|
||
|
|
| Property | Reference | Notes |
|
||
|
|
|:-----------|:----------|:------|
|
||
|
|
|color | [CSS Color Level 3](https://www.w3.org/TR/css3-color/#foreground) | |
|
||
|
|
|opacity | [CSS Color Level 3](https://www.w3.org/TR/css3-color/#opacity) | |
|
||
|
|
|filter | [CSS Filter Effect Level 1](https://drafts.fxtf.org/filters/#FilterProperty) | |
|
||
|
|
|font-family | [CSS Fonts Level 3](https://www.w3.org/TR/css3-fonts/#font-family-prop) | defaults to gtk-font-name setting |
|
||
|
|
|font-size | [CSS Fonts Level 3](https://www.w3.org/TR/css3-fonts/#font-size-prop) | defaults to gtk-font-name setting |
|
||
|
|
|font-style | [CSS Fonts Level 3](https://www.w3.org/TR/css3-fonts/#font-style-prop) | |
|
||
|
|
|font-variant| [CSS Fonts Level 3](https://www.w3.org/TR/css3-fonts/#descdef-font-variant) | only CSS2 values supported |
|
||
|
|
|font-weight | [CSS Fonts Level 3](https://www.w3.org/TR/css3-fonts/#font-weight-prop) | |
|
||
|
|
|font-stretch| [CSS Fonts Level 3](https://www.w3.org/TR/css3-fonts/#font-stretch-prop) | |
|
||
|
|
|font-kerning| [CSS Fonts Level 3](https://www.w3.org/TR/css3-fonts/#font-kerning-prop) | |
|
||
|
|
|font-variant-ligatures| [CSS Fonts Level 3](https://www.w3.org/TR/css3-fonts/#font-variant-ligatures-prop) | |
|
||
|
|
|font-variant-position| [CSS Fonts Level 3](https://www.w3.org/TR/css3-fonts/#font-variant-position-prop) | |
|
||
|
|
|font-variant-caps| [CSS Fonts Level 3](https://www.w3.org/TR/css3-fonts/#font-variant-position-prop) | |
|
||
|
|
|font-variant-numeric| [CSS Fonts Level 3](https://www.w3.org/TR/css3-fonts/#font-variant-numeric-prop) | |
|
||
|
|
|font-variant-alternates| [CSS Fonts Level 3](https://www.w3.org/TR/css3-fonts/#font-variant-alternates-prop) | |
|
||
|
|
|font-variant-east-asian| [CSS Fonts Level 3](https://www.w3.org/TR/css3-fonts/#font-variant-east-asian-prop) | |
|
||
|
|
|font-feature-settings| [CSS Fonts Level 3](https://www.w3.org/TR/css3-fonts/#font-feature-settings-prop) | |
|
||
|
|
|font-variation-settings| [CSS Fonts Level 4](https://www.w3.org/TR/css-fonts-4/#font-variation-settings-def) | |
|
||
|
|
|-gtk-dpi|[Number](https://www.w3.org/TR/css3-values/#number-value) | defaults to screen resolution |
|
||
|
|
|font| [CSS Fonts Level 3](https://www.w3.org/TR/css3-fonts/#font-prop) | CSS allows line-height, etc |
|
||
|
|
|font-variant| [CSS Fonts Level 3](https://www.w3.org/TR/css3-fonts/#font-variant-prop) | |
|
||
|
|
|caret-color|[CSS Basic User Interface Level 3](https://www.w3.org/TR/css3-ui/#caret-color) | CSS allows an auto value |
|
||
|
|
|-gtk-secondary-caret-color|[Color](https://www.w3.org/TR/css-color-3/#valuea-def-color) | used for the secondary caret in bidirectional text |
|
||
|
|
|letter-spacing| [CSS Text Level 3](https://www.w3.org/TR/css3-text/#letter-spacing) | |
|
||
|
|
|text-transform| [CSS Text Level 3](https://www.w3.org/TR/css-text-3/#text-transform-property) | CSS allows full-width and full-size-kana. Since 4.6 |
|
||
|
|
|line-height| [CSS Inline Layout Level 3](https://www.w3.org/TR/css-inline-3/#line-height-property) | Since 4.6 |
|
||
|
|
|text-decoration-line| [CSS Text Decoration Level 3](https://www.w3.org/TR/css-text-decor-3/#text-decoration-line-property) | |
|
||
|
|
|text-decoration-color| [CSS Text Decoration Level 3](https://www.w3.org/TR/css-text-decor-3/#text-decoration-color-property) | |
|
||
|
|
|text-decoration-style| [CSS Text Decoration Level 3](https://www.w3.org/TR/css-text-decor-3/#text-decoration-style-property) | CSS allows dashed and dotted |
|
||
|
|
|text-shadow| [CSS Text Decoration Level 3](https://www.w3.org/TR/css-text-decor-3/#text-shadow-property) | |
|
||
|
|
|text-decoration| [CSS Text Decoration Level 3](https://www.w3.org/TR/css-text-decor-3/#text-decoration-property) | |
|
||
|
|
|-gtk-icon-source| [Image](https://www.w3.org/TR/css-backgrounds-3/#typedef-image), `builtin` or `none` | used for builtin icons in buttons and expanders |
|
||
|
|
|-gtk-icon-size| [Length](https://www.w3.org/TR/css3-values/#length-value) | size used for builtin icons in buttons and expanders |
|
||
|
|
|-gtk-icon-style| `requested`, `regular` or `symbolic` | preferred style for application-loaded icons |
|
||
|
|
|-gtk-icon-transform| [Transform list](https://www.w3.org/TR/css-transforms-1/#typedef-transform-list) or `none` | applied to builtin and application-loaded icons |
|
||
|
|
|-gtk-icon-palette| Color palette, as explained above | used to recolor symbolic icons |
|
||
|
|
|-gtk-icon-shadow| [Shadow](https://www.w3.org/TR/css-backgrounds-3/#typedef-shadow) or `none` | applied to builtin and application-loaded icons |
|
||
|
|
|-gtk-icon-filter| [Filter value list](https://www.w3.org/TR/filter-effects-1/#typedef-filter-value-list) or `none` | applied to builtin and application-loaded icons |
|
||
|
|
|transform| [CSS Transforms Level 1](https://www.w3.org/TR/css-transforms-1/#transform-property) | |
|
||
|
|
|transform-origin| [CSS Transforms Level 1](https://www.w3.org/TR/css-transforms-1/#transform-origin-property) | CSS allows specifying a z component|
|
||
|
|
|min-width| [CSS Box Model Level 3](https://www.w3.org/TR/css3-box/#min-width) | CSS allows percentages |
|
||
|
|
|min-height| [CSS Box Model Level 3](https://www.w3.org/TR/css3-box/#min-height) | CSS allows percentages |
|
||
|
|
|margin-top| [CSS Box Model Level 3](https://www.w3.org/TR/css3-box/#margin-top) | CSS allows percentages or auto |
|
||
|
|
|margin-right| [CSS Box Model Level 3](https://www.w3.org/TR/css3-box/#margin-right) | CSS allows percentages or auto |
|
||
|
|
|margin-bottom| [CSS Box Model Level 3](https://www.w3.org/TR/css3-box/#margin-bottom) | CSS allows percentages or auto |
|
||
|
|
|margin-left| [CSS Box Model Level 3](https://www.w3.org/TR/css3-box/#margin-left) | CSS allows percentages or auto |
|
||
|
|
|padding-top| [CSS Box Model Level 3](https://www.w3.org/TR/css3-box/#padding-top) | CSS allows percentages |
|
||
|
|
|padding-right| [CSS Box Model Level 3](https://www.w3.org/TR/css3-box/#padding-right) | CSS allows percentages |
|
||
|
|
|padding-bottom| [CSS Box Model Level 3](https://www.w3.org/TR/css3-box/#padding-bottom) | CSS allows percentages |
|
||
|
|
|padding-left| [CSS Box Model Level 3](https://www.w3.org/TR/css3-box/#padding-left) | CSS allows percentages |
|
||
|
|
|margin| [CSS Box Model Level 3](https://www.w3.org/TR/css3-box/#margin) | a 'four sides' property |
|
||
|
|
|padding| [CSS Box Model Level 3](https://www.w3.org/TR/css3-box/#padding) | a 'four sides' property |
|
||
|
|
|border-top-width| [CSS Backgrounds and Borders Level 3](https://www.w3.org/TR/css3-background/#the-border-width) | CSS allows other values |
|
||
|
|
|border-right-width| [CSS Backgrounds and Borders Level 3](https://www.w3.org/TR/css3-background/#the-border-width) | CSS allows other values |
|
||
|
|
|border-bottom-width| [CSS Backgrounds and Borders Level 3](https://www.w3.org/TR/css3-background/#the-border-width) | CSS allows other values |
|
||
|
|
|border-left-width| [CSS Backgrounds and Borders Level 3](https://www.w3.org/TR/css3-background/#the-border-width) | CSS allows other values |
|
||
|
|
|border-top-style| [CSS Backgrounds and Borders Level 3](https://www.w3.org/TR/css3-background/#the-border-style) | |
|
||
|
|
|border-right-style| [CSS Backgrounds and Borders Level 3](https://www.w3.org/TR/css3-background/#the-border-style) | |
|
||
|
|
|border-bottom-style| [CSS Backgrounds and Borders Level 3](https://www.w3.org/TR/css3-background/#the-border-style) | |
|
||
|
|
|border-left-style| [CSS Backgrounds and Borders Level 3](https://www.w3.org/TR/css3-background/#the-border-style) | |
|
||
|
|
|border-top-right-radius| [CSS Backgrounds and Borders Level 3](https://www.w3.org/TR/css3-background/#the-border-radius) | |
|
||
|
|
|border-bottom-right-radius| [CSS Backgrounds and Borders Level 3](https://www.w3.org/TR/css3-background/#the-border-radius) | |
|
||
|
|
|border-bottom-left-radius| [CSS Backgrounds and Borders Level 3](https://www.w3.org/TR/css3-background/#the-border-radius) | |
|
||
|
|
|border-top-left-radius| [CSS Backgrounds and Borders Level 3](https://www.w3.org/TR/css3-background/#the-border-radius) | |
|
||
|
|
|border-top-color| [CSS Backgrounds and Borders Level 3](https://www.w3.org/TR/css3-background/#the-border-color) | |
|
||
|
|
|border-right-color| [CSS Backgrounds and Borders Level 3](https://www.w3.org/TR/css3-background/#the-border-color) | |
|
||
|
|
|border-bottom-color| [CSS Backgrounds and Borders Level 3](https://www.w3.org/TR/css3-background/#the-border-color) | |
|
||
|
|
|border-left-color| [CSS Backgrounds and Borders Level 3](https://www.w3.org/TR/css3-background/#the-border-color) | |
|
||
|
|
|border-image-source| [CSS Backgrounds and Borders Level 3](https://www.w3.org/TR/css3-background/#the-border-image-source) | |
|
||
|
|
|border-image-repeat| [CSS Backgrounds and Borders Level 3](https://www.w3.org/TR/css3-background/#the-border-image-repeat) | |
|
||
|
|
|border-image-slice| [CSS Backgrounds and Borders Level 3](https://www.w3.org/TR/css3-background/#the-border-image-slice) | a 'four sides' property |
|
||
|
|
|border-image-width| [CSS Backgrounds and Borders Level 3](https://www.w3.org/TR/css3-background/#the-border-image-width) | a 'four sides' property |
|
||
|
|
|border-width| [CSS Backgrounds and Borders Level 3](https://www.w3.org/TR/css3-background/#the-border-width) | a 'four sides' property |
|
||
|
|
|border-style| [CSS Backgrounds and Borders Level 3](https://www.w3.org/TR/css3-background/#the-border-style) | a 'four sides' property |
|
||
|
|
|border-color| [CSS Backgrounds and Borders Level 3](https://www.w3.org/TR/css3-background/#border-color) | a 'four sides' property |
|
||
|
|
|border-top| [CSS Backgrounds and Borders Level 3](https://www.w3.org/TR/css3-background/#border-top) | |
|
||
|
|
|border-right| [CSS Backgrounds and Borders Level 3](https://www.w3.org/TR/css3-background/#border-right) | |
|
||
|
|
|border-bottom| [CSS Backgrounds and Borders Level 3](https://www.w3.org/TR/css3-background/#border-bottom) | |
|
||
|
|
|border-left| [CSS Backgrounds and Borders Level 3](https://www.w3.org/TR/css3-background/#border-left) | |
|
||
|
|
|border| [CSS Backgrounds and Borders Level 3](https://www.w3.org/TR/css3-background/#border) | |
|
||
|
|
|border-radius| [CSS Backgrounds and Borders Level 3](https://www.w3.org/TR/css3-background/#border-radius) | |
|
||
|
|
|border-image| [CSS Backgrounds and Borders Level 3](https://www.w3.org/TR/css3-background/#border-image) | |
|
||
|
|
|outline-style| [CSS Basic User Interface Level 3](https://www.w3.org/TR/css3-ui/#outline-style) | initial value is none, auto is not supported |
|
||
|
|
|outline-width| [CSS Basic User Interface Level 3](https://www.w3.org/TR/css3-ui/#outline-width) | |
|
||
|
|
|outline-color| [CSS Basic User Interface Level 3](https://www.w3.org/TR/css3-ui/#outline-color) | initial value is currentColor, invert is not supported |
|
||
|
|
|outline-offset| [CSS Basic User Interface Level 3](https://www.w3.org/TR/css3-ui/#outline-offset) | |
|
||
|
|
|outline| [CSS Basic User Interface Level 3](https://www.w3.org/TR/css3-ui/#propdef-outline) | |
|
||
|
|
|background-color| [CSS Backgrounds and Borders Level 3](https://www.w3.org/TR/css3-background/#background-color) | |
|
||
|
|
|background-clip| [CSS Backgrounds and Borders Level 3](https://www.w3.org/TR/css3-background/#background-clip) | |
|
||
|
|
|background-origin| [CSS Backgrounds and Borders Level 3](https://www.w3.org/TR/css3-background/#background-origin) | |
|
||
|
|
|background-size| [CSS Backgrounds and Borders Level 3](https://www.w3.org/TR/css3-background/#background-size) | |
|
||
|
|
|background-position| [CSS Backgrounds and Borders Level 3](https://www.w3.org/TR/css3-background/#background-position) | |
|
||
|
|
|background-repeat| [CSS Backgrounds and Borders Level 3](https://www.w3.org/TR/css3-background/#background-repeat) | |
|
||
|
|
|background-image| [CSS Backgrounds and Borders Level 3](https://www.w3.org/TR/css3-background/#background-image) | not supported: urls without quotes |
|
||
|
|
|box-shadow| [CSS Backgrounds and Borders Level 3](https://www.w3.org/TR/css3-background/#box-shadow) | |
|
||
|
|
|background-blend-mode| [CSS Compositing and Blending Level 1](https://www.w3.org/TR/compositing-1/#propdef-background-blend-mode) | only affects multiple backgrounds |
|
||
|
|
|background| [CSS Backgrounds and Borders Level 3](https://www.w3.org/TR/css3-background/#background) | |
|
||
|
|
|transition-property| [CSS Transitions](https://www.w3.org/TR/css3-transitions/#transition-property) | |
|
||
|
|
|transition-duration| [CSS Transitions](https://www.w3.org/TR/css3-transitions/#transition-duration) | |
|
||
|
|
|transition-timing-function| [CSS Transitions](https://www.w3.org/TR/css3-transitions/#transition-timing-function) | |
|
||
|
|
|transition-delay| [CSS Transitions](https://www.w3.org/TR/css3-transitions/#transition-delay) | |
|
||
|
|
|transition| [CSS Transitions](https://www.w3.org/TR/css3-transitions/#transition) | |
|
||
|
|
|animation-name| [CSS Animations Level 1](https://www.w3.org/TR/css3-animations/#animation-name) | |
|
||
|
|
|animation-duration| [CSS Animations Level 1](https://www.w3.org/TR/css3-animations/#animation-duration) | |
|
||
|
|
|animation-timing-function| [CSS Animations Level 1](https://www.w3.org/TR/css3-animations/#animation-timing-function) | |
|
||
|
|
|animation-iteration-count| [CSS Animations Level 1](https://www.w3.org/TR/css3-animations/#animation-iteration-count) | |
|
||
|
|
|animation-direction| [CSS Animations Level 1](https://www.w3.org/TR/css3-animations/#animation-direction) | |
|
||
|
|
|animation-play-state| [CSS Animations Level 1](https://www.w3.org/TR/css3-animations/#animation-play-state) | |
|
||
|
|
|animation-delay| [CSS Animations Level 1](https://www.w3.org/TR/css3-animations/#animation-delay) | |
|
||
|
|
|animation-fill-mode| [CSS Animations Level 1](https://www.w3.org/TR/css3-animations/#animation-fill-mode) | |
|
||
|
|
|animation| [CSS Animations Level 1](https://www.w3.org/TR/css3-animations/#animation) | |
|
||
|
|
|border-spacing| [CSS Table Level 3](https://www.w3.org/TR/css-tables-3/#border-spacing-property) | respected by GtkBoxLayout, GtkGridLayout, GtkCenterLayout |
|