A cross platform button subclass for selecting colors. Will open a color chooser dialog when clicked. Offers live updates to button from color chooser dialog. More...

#include <qgscolorbutton.h>

Public Slots
void	setButtonBackground ()
	Sets the background pixmap for the button based upon set color and transparency.

Signals
void	colorChanged (const QColor &color)
	Is emitted, whenever a new color is accepted.

Public Member Functions
	QgsColorButton (QWidget *parent=0, QString cdt="", QColorDialog::ColorDialogOptions cdo=0)
	Construct a new color button.
	~QgsColorButton ()
void	setColor (const QColor &color)
	Specify the current color.
QColor	color () const
	Return the currently selected color.
void	setColorDialogOptions (QColorDialog::ColorDialogOptions cdo)
	Specify the options for the color chooser dialog (e.g.
QColorDialog::ColorDialogOptions	colorDialogOptions ()
	Returns the options for the color chooser dialog.
void	setColorDialogTitle (QString cdt)
	Set the title, which the color chooser dialog will show.
QString	colorDialogTitle ()
	Returns the title, which the color chooser dialog shows.
bool	acceptLiveUpdates ()
	Whether the button accepts live updates from QColorDialog.
void	setAcceptLiveUpdates (bool accept)
	Sets whether the button accepts live updates from QColorDialog.

Protected Member Functions
void	changeEvent (QEvent *e)
void	showEvent (QShowEvent *e)

Static Protected Member Functions
static const QPixmap &	transpBkgrd ()

Private Slots
void	onButtonClicked ()
void	setValidColor (const QColor &newColor)
	Sets color for button, if valid.

Private Attributes
QString	mColorDialogTitle
QColor	mColor
QColorDialog::ColorDialogOptions	mColorDialogOptions
bool	mAcceptLiveUpdates
QTemporaryFile	mTempPNG

Detailed Description

A cross platform button subclass for selecting colors. Will open a color chooser dialog when clicked. Offers live updates to button from color chooser dialog.

A cross platform button subclass for selecting colors.

A subclass of QPushButton is needed to draw the button content because some platforms such as Mac OS X and Windows XP enforce a consistent GUI look by always using the button color of the current style and not allowing button backgrounds to be changed on a button by button basis. Therefore, a wholely stylesheet-based button is used for the no-text variant.

This class is a simplified version of QtColorButton, an internal class used by Qt Designer to do the same thing.

Will open a color chooser dialog when clicked. Offers live updates to button from color chooser dialog

Note: inherited base class moved from QToolButton to QPushButton in QGIS 1.9

Definition at line 30 of file qgscolorbutton.h.

Constructor & Destructor Documentation

QgsColorButton::QgsColorButton	(	QWidget *	parent = `0`,
		QString	cdt = `""`,
		QColorDialog::ColorDialogOptions	cdo = `0`
	)

Construct a new color button.

Parameters

parent	The parent QWidget for the dialog
cdt	The title to show in the color chooser dialog
cdo	Options for the color chooser dialog

Note: changed in 1.9

Definition at line 41 of file qgscolorbutton.cpp.

References onButtonClicked().

QgsColorButton::~QgsColorButton ( )

Definition at line 52 of file qgscolorbutton.cpp.

References mTempPNG.

Member Function Documentation

bool QgsColorButton::acceptLiveUpdates ( )

inline

Whether the button accepts live updates from QColorDialog.

Note: added in 1.9

Definition at line 98 of file qgscolorbutton.h.

void QgsColorButton::changeEvent ( QEvent * e )

protected

Definition at line 101 of file qgscolorbutton.cpp.

References setButtonBackground().

QColor QgsColorButton::color ( void ) const

Return the currently selected color.

Returns: the currently selected color

Note: added in 1.9

Definition at line 271 of file qgscolorbutton.cpp.

References mColor.

Referenced by onButtonClicked(), setColor(), and QgsAttributeEditor::updateColor().

void QgsColorButton::colorChanged ( const QColor & color )

signal

Is emitted, whenever a new color is accepted.

The color is always valid. In case the new color is the same, no signal is emitted, to avoid infinite loops.

Parameters

color New color

Note: added in 1.9

Referenced by setColor().

QColorDialog::ColorDialogOptions QgsColorButton::colorDialogOptions ( )

Returns the options for the color chooser dialog.

Returns: Options for the color chooser dialog

Note: added in 1.9

Definition at line 281 of file qgscolorbutton.cpp.

References mColorDialogOptions.

QString QgsColorButton::colorDialogTitle ( )

Returns the title, which the color chooser dialog shows.

Returns: Title for the color chooser dialog

Note: added in 1.9

Definition at line 291 of file qgscolorbutton.cpp.

References mColorDialogTitle.

void QgsColorButton::onButtonClicked ( )

privateslot

Definition at line 68 of file qgscolorbutton.cpp.

References color(), QgsColorDialog::getLiveColor(), mAcceptLiveUpdates, mColorDialogOptions, mColorDialogTitle, and setValidColor().

Referenced by QgsColorButton().

void QgsColorButton::setAcceptLiveUpdates ( bool accept )

inline

Sets whether the button accepts live updates from QColorDialog.

Live updates may cause changes that are not undoable on QColorDialog cancel.

Note: added in 1.9

Definition at line 106 of file qgscolorbutton.h.

void QgsColorButton::setButtonBackground ( )

slot

Sets the background pixmap for the button based upon set color and transparency.

Call directly to update background after adding/removing QColorDialog::ShowAlphaChannel option but the color has not changed, i.e. setColor() wouldn't update button and you want the button to retain the set color's alpha component regardless