The QPalette 类包含各 Widget 状态的颜色组。 更多...
| 头： | #include <QPalette> |
| qmake: | QT += gui |
| enum | ColorGroup { Disabled, Active, Inactive, Normal } |
| enum | ColorRole { Window, Background, WindowText, Foreground, ..., NoRole } |
| QPalette () | |
| QPalette (const QColor & button ) | |
| QPalette (Qt::GlobalColor button ) | |
| QPalette (const QColor & button , const QColor & window ) | |
| QPalette (const QBrush & windowText , const QBrush & button , const QBrush & light , const QBrush & dark , const QBrush & mid , const QBrush & text , const QBrush & bright_text , const QBrush & base , const QBrush & window ) | |
| QPalette (const QPalette & p ) | |
| QPalette (QPalette && other ) | |
| ~QPalette () | |
| const QBrush & | alternateBase () const |
| const QBrush & | base () const |
| const QBrush & | brightText () const |
| const QBrush & | brush (QPalette::ColorGroup group , QPalette::ColorRole role ) const |
| const QBrush & | brush (QPalette::ColorRole role ) const |
| const QBrush & | button () const |
| const QBrush & | buttonText () const |
| qint64 | cacheKey () const |
| const QColor & | color (QPalette::ColorGroup group , QPalette::ColorRole role ) const |
| const QColor & | color (QPalette::ColorRole role ) const |
| QPalette::ColorGroup | currentColorGroup () const |
| const QBrush & | dark () const |
| const QBrush & | highlight () const |
| const QBrush & | highlightedText () const |
| bool | isBrushSet (QPalette::ColorGroup cg , QPalette::ColorRole cr ) const |
| bool | isCopyOf (const QPalette & p ) const |
| bool | isEqual (QPalette::ColorGroup cg1 , QPalette::ColorGroup cg2 ) const |
| const QBrush & | light () const |
| const QBrush & | link () const |
| const QBrush & | linkVisited () const |
| const QBrush & | mid () const |
| const QBrush & | midlight () const |
| const QBrush & | placeholderText () const |
| QPalette | resolve (const QPalette & other ) const |
| void | setBrush (QPalette::ColorRole role , const QBrush & brush ) |
| void | setBrush (QPalette::ColorGroup group , QPalette::ColorRole role , const QBrush & brush ) |
| void | setColor (QPalette::ColorGroup group , QPalette::ColorRole role , const QColor & color ) |
| void | setColor (QPalette::ColorRole role , const QColor & color ) |
| void | setColorGroup (QPalette::ColorGroup cg , const QBrush & windowText , const QBrush & button , const QBrush & light , const QBrush & dark , const QBrush & mid , const QBrush & text , const QBrush & bright_text , const QBrush & base , const QBrush & window ) |
| void | setCurrentColorGroup (QPalette::ColorGroup cg ) |
| const QBrush & | shadow () const |
| void | swap (QPalette & other ) |
| const QBrush & | text () const |
| const QBrush & | toolTipBase () const |
| const QBrush & | toolTipText () const |
| const QBrush & | window () const |
| const QBrush & | windowText () const |
| QVariant | operator QVariant () const |
| bool | operator!= (const QPalette & p ) const |
| QPalette & | operator= (const QPalette & p ) |
| QPalette & | operator= (QPalette && other ) |
| bool | operator== (const QPalette & p ) const |
| const QMetaObject | staticMetaObject |
| QDataStream & | operator<< (QDataStream & s , const QPalette & p ) |
| QDataStream & | operator>> (QDataStream & s , QPalette & p ) |
The QPalette 类包含各 Widget 状态的颜色组。
调色板由 3 个颜色组组成： 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 QGuiApplication::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 Vista and the macOS styles.
另请参阅 QApplication::setPalette (), QWidget::setPalette ()，和 QColor .
| 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
|
一般背景色。 |
QPalette::Background
|
Window
|
This value is obsolete. Use Window instead. |
QPalette::WindowText
|
0
|
一般前景色。 |
QPalette::Foreground
|
WindowText
|
This value is obsolete. Use WindowText instead. |
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::PlaceholderText
|
20
|
Used as the placeholder color for various text input widgets. This enum value has been introduced in Qt 5.12 |
QPalette::Text
|
6
|
The foreground color used with
基
. This is usually the same as the
WindowText
, in which case it must provide good contrast with
Window
and
基
.
|
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
颜色。
|
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
颜色。
|
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 .
此构造函数很快感谢 隐式共享 .
移动构造 QPalette 实例，使之指向同一对象如 other 所指向的。
After being moved from, you can only assign to or destroy other . Any other operation will result in undefined behavior.
该函数在 Qt 5.4 引入。
Destroys the palette.
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.
返回的数字标识内容对于此 QPalette 对象。截然不同的 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 ().
返回
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== ().
返回
true
(usually quickly) if color group
cg1
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.
Returns the placeholder text brush of the current color group.
注意： Before Qt 5.12, the placeholder text color was hard-coded in the code as QPalette::text (). color () where an alpha of 128 was applied. We continue to support this behavior by default, unless you set your own brush. One can get back the original placeholder color setting the special QBrush default constructor as placeholder brush.
该函数在 Qt 5.12 引入。
返回新的 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 ，到 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.
Swaps this palette instance with other 。此函数非常快且从不失败。
该函数在 Qt 5.0 引入。
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.
Returns the palette as a QVariant
返回
true
(slowly) if this palette is different from
p
；否则返回
false
(usually quickly).
注意： 当前 ColorGroup is not taken into account when comparing palettes
另请参阅 operator== ().
赋值 p to this palette and returns a reference to this palette.
This operation is fast thanks to 隐式共享 .
移动赋值 other 到此 QPalette 实例。
该函数在 Qt 5.2 引入。
返回
true
(usually quickly) if this palette is equal to
p
；否则返回
false
(slowly).
注意： 当前 ColorGroup is not taken into account when comparing palettes
另请参阅 operator!= ().
Writes the palette, p 到流 s 并返回流引用。
另请参阅 QDataStream 运算符格式 .
Reads a palette from the stream, s into the palette p ，并返回流引用。
另请参阅 QDataStream 运算符格式 .