QColorDialog 类

QColorDialog 类提供用于指定颜色的对话框 Widget。 更多...

头：	#include <QColorDialog>
CMake:	find_package(Qt6 REQUIRED COMPONENTS Widgets) target_link_libraries(mytarget PRIVATE Qt6::Widgets)
qmake:	QT += widgets
继承：	QDialog

• 所有成员列表，包括继承成员
• QColorDialog is part of 标准对话框 .

公共类型

enum	ColorDialogOption { ShowAlphaChannel, NoButtons, NoEyeDropperButton, DontUseNativeDialog }
flags	ColorDialogOptions

特性

• currentColor : QColor
• options : ColorDialogOptions

公共函数

	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

重实现公共函数

virtual void

setVisible (bool visible ) override

信号

void	colorSelected (const QColor & color )
void	currentColorChanged (const QColor & color )

静态公共成员

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 )

重实现保护函数

virtual void	changeEvent (QEvent * e ) override
virtual void	done (int result ) override

详细描述

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.

静态函数提供模态颜色对话框。

静态 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.

用户可以存储 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 标准对话框 范例展示如何使用 QColorDialog 及其它内置 Qt 对话框。

另请参阅 QColor , QFileDialog , QFontDialog ，和 标准对话框范例 .

成员类型文档编制

enum QColorDialog:: ColorDialogOption
flags QColorDialog:: ColorDialogOptions

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	不显示 OK and Cancel buttons. (Useful for "live dialogs".)
QColorDialog::NoEyeDropperButton	0x00000008	Hide the Eye Dropper button. This value was added in Qt 6.6.
QColorDialog::DontUseNativeDialog	0x00000004	Use Qt's standard color dialog instead of the operating system native color dialog.

ColorDialogOptions 类型是 typedef 对于 QFlags <ColorDialogOption>. It stores an OR combination of ColorDialogOption values.

另请参阅 options , setOption (), testOption ()，和 windowModality ().

特性文档编制

currentColor : QColor

This property holds the currently selected color in the dialog

访问函数：

QColor	currentColor () const
void	setCurrentColor (const QColor & color )

通知程序信号：

void	currentColorChanged (const QColor & color )

options : ColorDialogOptions

This property holds the various options that affect the look and feel of the dialog

默认情况下，所有选项是被禁用的。

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).

访问函数：

QColorDialog::ColorDialogOptions	options () const
void	setOptions (QColorDialog::ColorDialogOptions options )

另请参阅 setOption () 和 testOption ().

成员函数文档编制

[explicit] QColorDialog:: QColorDialog ( QWidget * parent = nullptr)

构造颜色对话框采用给定 parent .

[explicit] QColorDialog:: QColorDialog (const QColor & initial , QWidget * parent = nullptr)

构造颜色对话框采用给定 parent 和指定 initial 颜色。

[virtual noexcept] QColorDialog:: ~QColorDialog ()

销毁颜色对话框。

[override virtual protected] void QColorDialog:: changeEvent ( QEvent * e )

重实现： QWidget::changeEvent (QEvent *event).

[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 .

另请参阅 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： 通知程序信号对于特性 currentColor .

另请参阅 color and colorSelected ().

[static] QColor QColorDialog:: customColor ( int index )

返回自定义颜色在给定 index 作为 QColor 值。

另请参阅 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 )

重实现： QDialog::done (int r).

关闭对话框并将其结果代码设为 result 。若此对话框的展示是采用 exec ()，done() 导致本地事件循环的完成，且 exec () 返回 result .

另请参阅 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 自变量允许您定制对话框。

void QColorDialog:: open ( QObject * receiver , const char * member )

打开对话框并连接其 colorSelected () 信号到槽，指定通过 receiver and member .

将从槽断开信号连接，当关闭对话框时。

QColor QColorDialog:: selectedColor () const

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 )

设置自定义颜色在 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 选项。

另请参阅 customColor ().

void QColorDialog:: setOption ( QColorDialog::ColorDialogOption option , bool on = true)

设置给定 option 为被启用若 on 为 true；否则，清零给定 option .

另请参阅 options and testOption ().

[static] void QColorDialog:: setStandardColor ( int index , QColor color )

设置标准颜色在 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 选项。

另请参阅 standardColor ().

[override virtual] void QColorDialog:: setVisible ( bool visible )

重实现： QDialog::setVisible (bool visible).

更改对话框的可见性。若 visible 为 true，展示对话框；否则，被隐藏。

[static] QColor QColorDialog:: standardColor ( int index )

返回标准颜色在给定 index 作为 QColor 值。

另请参阅 setStandardColor ().

bool QColorDialog:: testOption ( QColorDialog::ColorDialogOption option ) const

返回 true 若给定 option 被启用；否则，返回 false。

另请参阅 options and setOption ().

内容

• 公共类型

• 特性

• 公共函数

• 重实现公共函数

• 信号

• 静态公共成员

• 重实现保护函数

• 详细描述