A visual style for graphs. More...
| Import Statement: | import QtDataVisualization |
| Since: | QtDataVisualization 1.0 |
| Instantiates: | Q3DTheme |
This type is used to specify visual properties that affect the whole graph. There are several built-in themes that can be used as is or modified freely.
The following properties can be overridden by using Abstract3DSeries properties to set them explicitly in the series: baseColors, baseGradients, and colorStyle.
Themes can be created from scratch by using the Theme3D.ThemeUserDefined enum value.
The following table lists the properties controlled by themes and the default values for Theme3D.ThemeUserDefined.
| Property | Default Value |
|---|---|
| ambientLightStrength | 0.25 |
| backgroundColor | "black". For more information, see color. |
| backgroundEnabled | true |
| baseColors | "black" |
| baseGradients | QLinearGradient. Essentially fully black. |
| colorStyle | ColorStyleUniform |
| font | font |
| gridEnabled | true |
| gridLineColor | "white" |
| highlightLightStrength | 7.5 |
| labelBackgroundColor | "gray" |
| labelBackgroundEnabled | true |
| labelBorderEnabled | true |
| labelTextColor | "white" |
| lightColor | "white" |
| lightStrength | 5.0 |
| multiHighlightColor | "blue" |
| multiHighlightGradient | QLinearGradient. Essentially fully black. |
| singleHighlightColor | "red" |
| singleHighlightGradient | QLinearGradient. Essentially fully black. |
| windowColor | "black" |
Using a built-in theme without any modifications:
Scatter3D {
...
theme: Theme3D { type: Theme3D.ThemeRetro }
...
} Using a built-in theme and modifying some properties:
Bars3D {
...
theme: Theme3D {
type: Theme3D.ThemeRetro
labelBorderEnabled: true
font.pointSize: 35
labelBackgroundEnabled: false
}
...
} Using a user-defined theme:
Surface3D {
...
theme: Theme3D {
ambientLightStrength: 0.5
backgroundColor: "red"
backgroundEnabled: true
baseColor: "blue"
colorStyle: Theme3D.ColorStyleUniform
font.family: "Lucida Handwriting"
font.pointSize: 35
gridEnabled: false
gridLineColor: "black"
highlightLightStrength: 0.5
labelBackgroundColor: "black"
labelBackgroundEnabled: true
labelBorderEnabled: false
labelTextColor: "white"
lightColor: "yellow"
lightStrength: 0.4
multiHighlightColor: "green"
singleHighlightColor: "darkRed"
windowColor: "white"
}
...
} For Theme3D enums, see Q3DTheme::ColorStyle and Q3DTheme::Theme.
ambientLightStrength : real
The ambient light strength for the whole graph. This value determines how evenly and brightly the colors are shown throughout the graph regardless of the light position. The value must be between 0.0 and 1.0.
backgroundColor : color
The color of the graph background.
backgroundEnabled : bool
Defines whether the background is drawn by using the value of backgroundColor.
baseColors : list<ThemeColor>
The list of base colors to be used for all the objects in the graph, series by series. If there are more series than colors, color list wraps and starts again with the first color in the list. Has no immediate effect if colorStyle is not Theme3D.ColorStyleUniform.
This can be overridden by setting Abstract3DSeries.baseColor explicitly in the series.
baseGradients : list<ColorGradient>
The list of base gradients to be used for all the objects in the graph, series by series. If there are more series than gradients, the gradient list wraps and starts again with the first gradient in the list.
Has no immediate effect if colorStyle is Theme3D.ColorStyleUniform.
This value can be overridden by setting Abstract3DSeries.baseGradient explicitly in the series.
colorStyle : Theme3D.ColorStyle
The style of the graph colors. One of Q3DTheme::ColorStyle enum values.
This value can be overridden by setting Abstract3DSeries.colorStyle explicitly in the series.
See also Q3DTheme::ColorStyle.
font : font
Sets the font to be used for labels.
gridEnabled : bool
Defines whether the grid lines are drawn. This value affects all grid lines.
gridLineColor : color
The color of the grid lines.
highlightLightStrength : real
The specular light strength for selected objects. The value must be between 0.0 and 10.0.
labelBackgroundColor : color
The color of the label backgrounds. Has no effect if labelBackgroundEnabled is false.
labelBackgroundEnabled : bool
Defines whether the label is drawn with a background that uses labelBackgroundColor (including alpha), or with a fully transparent background. Labels with a background are drawn to equal sizes per axis based on the longest label, and the text is centered in them. Labels without a background are drawn as is and are left or right aligned based on their position in the graph.
labelBorderEnabled : bool
Defines whether label borders are drawn for labels that have a background. Has no effect if labelBackgroundEnabled is false.
labelTextColor : color
The color of the font used for labels.
lightColor : color
The color of the ambient and specular light defined in Scene3D.
lightStrength : real
The specular light strength for the whole graph. The value must be between 0.0 and 10.0.
This value affects the light specified in Scene3D.
multiHighlightColor : color
The highlight color for selected objects. Used if selectionMode has the AbstractGraph3D.SelectionRow or AbstractGraph3D.SelectionColumn flag set.
multiHighlightGradient : ColorGradient
The highlight gradient for selected objects. Used if selectionMode has the AbstractGraph3D.SelectionRow or AbstractGraph3D.SelectionColumn flag set.
singleHighlightColor : color
The highlight color for a selected object. Used if selectionMode has the AbstractGraph3D.SelectionItem flag set.
singleHighlightGradient : ColorGradient
The highlight gradient for a selected object. Used if selectionMode has the AbstractGraph3D.SelectionItem flag set.
type : Theme3D.Theme
The type of the theme. If no type is set, the type is Theme3D.ThemeUserDefined. Changing the theme type after the item has been constructed will change all other properties of the theme to what the predefined theme specifies. Changing the theme type of the active theme of the graph will also reset all attached series to use the new theme.
windowColor : color
The color of the application window the graph is drawn into.
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Licensed under the GNU Free Documentation License, Version 1.3.
https://doc.qt.io/qt-6.2/qml-qtdatavisualization-theme3d.html