The QColorDialog class provides a dialog widget for specifying colors. 更多...
| 頭： | #include <QColorDialog> |
| qmake: | QT += widgets |
| 繼承： | QDialog |
| enum | ColorDialogOption { ShowAlphaChannel, NoButtons, DontUseNativeDialog } |
| flags | ColorDialogOptions |
| QColorDialog (QWidget * parent = nullptr) | |
| QColorDialog (const QColor & initial , QWidget * parent = nullptr) | |
| virtual | ~QColorDialog () |
| QColor | currentColor () const |
| void | open (QObject * receiver , const char * member ) |
| QColorDialog::ColorDialogOptions | options () const |
| QColor | selectedColor () const |
| void | setCurrentColor (const QColor & color ) |
| void | setOption (QColorDialog::ColorDialogOption option , bool on = true) |
| void | setOptions (QColorDialog::ColorDialogOptions options ) |
| bool | testOption (QColorDialog::ColorDialogOption option ) const |
| virtual void | setVisible (bool visible ) override |
| void | colorSelected (const QColor & color ) |
| void | currentColorChanged (const QColor & color ) |
| QColor | customColor (int index ) |
| int | customCount () |
| QColor | getColor (const QColor & initial = Qt::white, QWidget * parent = nullptr, const QString & title = QString(), QColorDialog::ColorDialogOptions options = ColorDialogOptions()) |
| void | setCustomColor (int index , QColor color ) |
| void | setStandardColor (int index , QColor color ) |
| QColor | standardColor (int index ) |
| const QMetaObject | staticMetaObject |
| virtual void | changeEvent (QEvent * e ) override |
| virtual void | done (int result ) override |
The QColorDialog class provides a dialog widget for specifying colors.
The color dialog's function is to allow users to choose colors. For example, you might use this in a drawing program to allow the user to set the brush color.
靜態函數提供模態顔色對話框。
靜態 getColor () function shows the dialog, and allows the user to specify a color. This function can also be used to let users choose a color with a level of transparency: pass the ShowAlphaChannel option as an additional argument.
用戶可以存儲 customCount () different custom colors. The custom colors are shared by all color dialogs, and remembered during the execution of the program. Use setCustomColor () to set the custom colors, and use customColor () to get them.
When pressing the "Pick Screen Color" button, the cursor changes to a haircross and the colors on the screen are scanned. The user can pick up one by clicking the mouse or the Enter button. Pressing Escape restores the last color selected before entering this mode.
The 標準對話框 範例展示如何使用 QColorDialog 及其它內置 Qt 對話框。
另請參閱 QColor , QFileDialog , QFontDialog ，和 標準對話框範例 .
This enum specifies various options that affect the look and feel of a color dialog.
| 常量 | 值 | 描述 |
|---|---|---|
QColorDialog::ShowAlphaChannel
|
0x00000001
|
Allow the user to select the alpha component of a color. |
QColorDialog::NoButtons
|
0x00000002
|
不顯示 OK and Cancel buttons. (Useful for "live dialogs".) |
QColorDialog::DontUseNativeDialog
|
0x00000004
|
Use Qt's standard color dialog instead of the operating system native color dialog. |
該枚舉在 Qt 4.5 引入或被修改。
ColorDialogOptions 類型是 typedef 對於 QFlags <ColorDialogOption>. It stores an OR combination of ColorDialogOption values.
另請參閱 options , setOption (), testOption ()，和 windowModality ().
This property holds the currently selected color in the dialog
訪問函數：
| QColor | currentColor () const |
| void | setCurrentColor (const QColor & color ) |
通知程序信號：
| void | currentColorChanged (const QColor & color ) |
This property holds the various options that affect the look and feel of the dialog
默認情況下，所有選項是被禁用的。
Options should be set before showing the dialog. Setting them while the dialog is visible is not guaranteed to have an immediate effect on the dialog (depending on the option and on the platform).
訪問函數：
| QColorDialog::ColorDialogOptions | options () const |
| void | setOptions (QColorDialog::ColorDialogOptions options ) |
另請參閱 setOption () 和 testOption ().
構造顔色對話框采用給定 parent .
該函數在 Qt 4.5 引入。
構造顔色對話框采用給定 parent 和指定 initial 顔色。
該函數在 Qt 4.5 引入。
[虛擬]
QColorDialog::
~QColorDialog
()
銷毀顔色對話框。
[override virtual protected]
void
QColorDialog::
changeEvent
(
QEvent
*
e
)
重實現自 QWidget::changeEvent ().
[signal]
void
QColorDialog::
colorSelected
(const
QColor
&
color
)
This signal is emitted just after the user has clicked OK to select a color to use. The chosen color is specified by color .
另請參閱 color and currentColorChanged ().
[signal]
void
QColorDialog::
currentColorChanged
(const
QColor
&
color
)
This signal is emitted whenever the current color changes in the dialog. The current color is specified by color .
注意： 通知程序信號對於特性 currentColor .
另請參閱 color and colorSelected ().
[static]
QColor
QColorDialog::
customColor
(
int
index
)
返迴自定義顔色在給定 index 作為 QColor 值。
該函數在 Qt 4.5 引入。
另請參閱 setCustomColor ().
[static]
int
QColorDialog::
customCount
()
Returns the number of custom colors supported by QColorDialog . All color dialogs share the same custom colors.
[override virtual protected]
void
QColorDialog::
done
(
int
result
)
重實現自 QDialog::done ().
關閉對話框並將其結果代碼設為 result 。若此對話框的展示是采用 exec ()，done() 導緻本地事件循環的完成，且 exec () 返迴 result .
另請參閱 QDialog::done ().
[static]
QColor
QColorDialog::
getColor
(const
QColor
&
initial
= Qt::white,
QWidget
*
parent
= nullptr, const
QString
&
title
= QString(),
QColorDialog::ColorDialogOptions
options
= ColorDialogOptions())
Pops up a modal color dialog with the given window title (or "Select Color" if none is specified), lets the user choose a color, and returns that color. The color is initially set to initial . The dialog is a child of parent . It returns an invalid (see QColor::isValid ()) color if the user cancels the dialog.
The options 自變量允許您定製對話框。
該函數在 Qt 4.5 引入。
打開對話框並連接其 colorSelected () 信號到槽，指定通過 receiver and member .
將從槽斷開信號連接，當關閉對話框時。
該函數在 Qt 4.5 引入。
Returns the color that the user selected by clicking the OK or equivalent button.
注意： This color is not always the same as the color held by the currentColor property since the user can choose different colors before finally selecting the one to use.
[static]
void
QColorDialog::
setCustomColor
(
int
index
,
QColor
color
)
設置自定義顔色在 index 到 QColor color 值。
注意： This function does not apply to the Native Color Dialog on the macOS platform. If you still require this function, use the QColorDialog::DontUseNativeDialog 選項。
另請參閱 customColor ().
設置給定 option 為被啓用若 on 為 true；否則，清零給定 option .
另請參閱 options and testOption ().
[static]
void
QColorDialog::
setStandardColor
(
int
index
,
QColor
color
)
設置標準顔色在 index 到 QColor color 值。
注意： This function does not apply to the Native Color Dialog on the macOS platform. If you still require this function, use the QColorDialog::DontUseNativeDialog 選項。
另請參閱 standardColor ().
[override virtual]
void
QColorDialog::
setVisible
(
bool
visible
)
重實現自 QDialog::setVisible ().
更改對話框的可見性。若 visible 為 true，展示對話框；否則，被隱藏。
[static]
QColor
QColorDialog::
standardColor
(
int
index
)
返迴標準顔色在給定 index 作為 QColor 值。
該函數在 Qt 5.0 引入。
另請參閱 setStandardColor ().
返迴
true
若給定
option
被啓用；否則，返迴 false。
該函數在 Qt 4.5 引入。