QPalette 类包含用于各 Widget 状态的颜色组。 更多...
The QPalette class contains color groups for each widget 状态。
A palette consists of three color groups: Active , Disabled ，和 Inactive . All widgets in Qt contain a palette and use their palette to draw themselves. This makes the user interface easily configurable and easier to keep consistent.
If you create a new widget we strongly recommend that you use the colors in the palette rather than hard-coding specific colors.
The color groups:
Both active and inactive windows can contain disabled widgets. (Disabled widgets are often called inaccessible or grayed out .)
In most styles, Active and Inactive look the same.
Colors and brushes can be set for particular roles in any of a palette's color groups with setColor () 和 setBrush (). A color group contains a group of colors used by widgets for drawing themselves. We recommend that widgets use color group roles from the palette such as "foreground" and "base" rather than literal colors like "red" or "turquoise". The color roles are enumerated and defined in the ColorRole 文档编制。
We strongly recommend that you use the default palette of the current style (returned by QApplication.palette ()) and modify that as necessary. This is done by Qt's widgets when they are drawn.
To modify a color group you call the functions setColor () 和 setBrush (), depending on whether you want a pure color or a pixmap pattern.
There are also corresponding color () 和 brush () getters, and a commonly used convenience function to get the ColorRole for the current ColorGroup : window (), windowText (), base ()，等。
You can copy a palette using the copy constructor and test to see if two palettes are identical 使用 isCopyOf ().
QPalette is optimized by the use of 隐式共享 , so it is very efficient to pass QPalette objects as arguments.
警告： Some styles do not use the palette for all drawing, for instance, if they make use of native theme engines. This is the case for both the Windows XP, Windows Vista, and the Mac OS X styles.
| 常量 | 值 | 描述 |
|---|---|---|
| QPalette.Disabled | 1 | |
| QPalette.Active | 0 | |
| QPalette.Inactive | 2 | |
| QPalette.Normal | Active | synonym for Active |
The ColorRole enum defines the different symbolic color roles used in current GUIs.
The central roles are:
| 常量 | 值 | 描述 |
|---|---|---|
| QPalette.Window | 10 | A general background color. |
| QPalette.Background | Window | This value is obsolete. Use Window 代替。 |
| QPalette.WindowText | 0 | A general foreground color. |
| QPalette.Foreground | WindowText | This value is obsolete. Use WindowText 代替。 |
| QPalette.Base | 9 | Used mostly as the background color for text entry widgets, but can also be used for other painting - such as the background of combobox drop down lists and toolbar handles. It is usually white or another light color. |
| QPalette.AlternateBase | 16 | Used as the alternate background color in views with alternating row colors (see QAbstractItemView.setAlternatingRowColors ()). |
| QPalette.ToolTipBase | 18 | Used as the background color for QToolTip and QWhatsThis . Tool tips use the Inactive color group of QPalette , because tool tips are not active windows. |
| QPalette.ToolTipText | 19 | Used as the foreground color for QToolTip and QWhatsThis . Tool tips use the Inactive color group of QPalette , because tool tips are not active windows. |
| QPalette.Text | 6 | The foreground color used with Base . This is usually the same as the WindowText , in which case it must provide good contrast with Window and Base . |
| QPalette.Button | 1 | The general button background color. This background can be different from Window as some styles require a different background color for buttons. |
| QPalette.ButtonText | 8 | A foreground color used with the Button color. |
| QPalette.BrightText | 7 | A text color that is very different from WindowText , and contrasts well with e.g. Dark . Typically used for text that needs to be drawn where 文本 or WindowText would give poor contrast, such as on pressed push buttons. Note that text colors can be used for things other than just words; text colors are usually used for text, but it's quite common to use the text color roles for lines, icons, etc. |
There are some color roles used mostly for 3D bevel and shadow effects. All of these are normally derived from Window , and used in ways that depend on that relationship. For example, buttons depend on it to make the bevels look attractive, and Motif scroll bars depend on Mid to be slightly different from Window .
| 常量 | 值 | 描述 |
|---|---|---|
| QPalette.Light | 2 | Lighter than Button color. |
| QPalette.Midlight | 3 | Between Button and Light . |
| QPalette.Dark | 4 | Darker than Button . |
| QPalette.Mid | 5 | Between Button and Dark . |
| QPalette.Shadow | 11 | A very dark color. By default, the shadow color is Qt.black . |
Selected (marked) items have two roles:
| 常量 | 值 | 描述 |
|---|---|---|
| QPalette.Highlight | 12 | A color to indicate a selected item or the current item. By default, the highlight color is Qt.darkBlue . |
| QPalette.HighlightedText | 13 | A text color that contrasts with Highlight . By default, the highlighted text color is Qt.white . |
There are two color roles related to hyperlinks:
| 常量 | 值 | 描述 |
|---|---|---|
| QPalette.Link | 14 | A text color used for unvisited hyperlinks. By default, the link color is Qt.blue . |
| QPalette.LinkVisited | 15 | A text color used for already visited hyperlinks. By default, the linkvisited color is Qt.magenta . |
Note that we do not use the Link and LinkVisited roles when rendering rich text in Qt, and that we recommend that you use CSS and the QTextDocument.setDefaultStyleSheet () function to alter the appearance of links. For example:
QTextBrowser browser;
QColor linkColor(Qt.red);
QString sheet = QString.fromLatin1("a { text-decoration: underline; color: %1 }").arg(linkColor.name());
browser.document()->setDefaultStyleSheet(sheet);
| 常量 | 值 | 描述 |
|---|---|---|
| QPalette.NoRole | 17 | No role; this special role is often used to indicate that a role has not been assigned. |
Constructs a palette object that uses the application's default palette.
另请参阅 QApplication.setPalette () 和 QApplication.palette ().
Constructs a palette from the button color. The other colors are automatically calculated, based on this color. Window will be the button color as well.
Constructs a palette from the button color. The other colors are automatically calculated, based on this color. Window will be the button color as well.
Constructs a palette from a button color and a window . The other colors are automatically calculated, based on these colors.
Constructs a palette. You can pass either brushes, pixmaps or plain colors for windowText , button , light , dark , mid , text , bright_text , base and window .
另请参阅 QBrush .
构造副本为 p .
This constructor is fast thanks to 隐式共享 .
Returns the alternate base brush of the current color group.
Returns the base brush of the current color group.
Returns the bright text foreground brush of the current color group.
Returns the brush in the specified color group , used for the given color role .
另请参阅 color (), setBrush ()，和 ColorRole .
这是重载函数。
Returns the brush that has been set for the given color role in the current ColorGroup .
另请参阅 color (), setBrush ()，和 ColorRole .
Returns the button brush of the current color group.
Returns the button text foreground brush of the current color group.
Returns a number that identifies the contents of this QPalette object. Distinct QPalette objects can have the same key if they refer to the same contents.
The cacheKey() will change when the palette is altered.
Returns the color in the specified color group , used for the given color role .
另请参阅 brush (), setColor ()，和 ColorRole .
这是重载函数。
Returns the color that has been set for the given color role in the current ColorGroup .
Returns the palette's current color group.
另请参阅 setCurrentColorGroup ().
Returns the dark brush of the current color group.
Returns the highlight brush of the current color group.
Returns the highlighted text brush of the current color group.
返回 true 若 ColorGroup cg and ColorRole cr has been set previously on this palette; otherwise returns false.
该函数在 Qt 4.2 引入。
另请参阅 setBrush ().
Returns true if this palette and p are copies of each other, i.e. one of them was created as a copy of the other and neither was subsequently modified; otherwise returns false. This is much stricter than equality.
另请参阅 operator= () 和 operator== ().
Returns true (usually quickly) if color group cg1 is 等于 cg2 ；否则返回 false。
Returns the light brush of the current color group.
Returns the unvisited link text brush of the current color group.
Returns the visited link text brush of the current color group.
Returns the mid brush of the current color group.
Returns the midlight brush of the current color group.
返回新 QPalette that has attributes copied from other .
Sets the brush for the given color role 到指定 brush for all groups in the palette.
另请参阅 brush (), setColor ()，和 ColorRole .
这是重载函数。
Sets the brush in the specified color group , used for the given color role , to brush .
另请参阅 brush (), setColor ()，和 ColorRole .
Sets the color in the specified color group , used for the given color role , to the specified solid color .
另请参阅 setBrush (), color ()，和 ColorRole .
这是重载函数。
Sets the color used for the given color role , in all color groups, to the specified solid color .
另请参阅 brush (), setColor ()，和 ColorRole .
Sets a the group at cg . You can pass either brushes, pixmaps or plain colors for windowText , button , light , dark , mid , text , bright_text , base and window .
另请参阅 QBrush .
Set the palette's current color group to cg .
另请参阅 currentColorGroup ().
Returns the shadow brush of the current color group.
Returns the text foreground brush of the current color group.
Returns the tool tip base brush of the current color group. This brush is used by QToolTip and QWhatsThis .
注意： Tool tips use the Inactive color group of QPalette , because tool tips are not active windows.
该函数在 Qt 4.4 引入。
Returns the tool tip text brush of the current color group. This brush is used by QToolTip and QWhatsThis .
注意： Tool tips use the Inactive color group of QPalette , because tool tips are not active windows.
该函数在 Qt 4.4 引入。
Returns the window (general background) brush of the current color group.
Returns the window text (general foreground) brush of the current color group.