The QtColorTriangle class provides a triangular color selection widget. More...

Public Slots
void	setColor (const QColor &col)
Signals
void	colorChanged (const QColor &col)
Public Member Functions
	QtColorTriangle (QWidget *parent=0)
	~QtColorTriangle ()
QSize	sizeHint () const
int	heightForWidth (int w) const
void	polish ()
QColor	color () const
Protected Member Functions
void	paintEvent (QPaintEvent *)
void	mouseMoveEvent (QMouseEvent *)
void	mousePressEvent (QMouseEvent *)
void	mouseReleaseEvent (QMouseEvent *)
void	keyPressEvent (QKeyEvent *e)
void	resizeEvent (QResizeEvent *)
void	drawTrigon (QImage *p, const QPointF &a, const QPointF &b, const QPointF &c, const QColor &color)
Private Types
enum	SelectionMode { Idle, SelectingHue, SelectingSatValue }
Private Member Functions
double	radiusAt (const QPointF &pos, const QRect &rect) const
double	angleAt (const QPointF &pos, const QRect &rect) const
QPointF	movePointToTriangle (double x, double y, const Vertex &a, const Vertex &b, const Vertex &c) const
QPointF	pointFromColor (const QColor &col) const
QColor	colorFromPoint (const QPointF &p) const
void	genBackground ()
Private Attributes
QImage	bg
double	a
double	b
double	c
QPointF	pa
QPointF	pb
QPointF	pc
QPointF	pd
QColor	curColor
int	curHue
bool	mustGenerateBackground
int	penWidth
int	ellipseSize
int	outerRadius
QPointF	selectorPos
enum QtColorTriangle::SelectionMode	selMode

Detailed Description

The QtColorTriangle class provides a triangular color selection widget.

This widget uses the HSV color model, and is therefore useful for selecting colors by eye.

The triangle in the center of the widget is used for selecting saturation and value, and the surrounding circle is used for selecting hue.

Use setColor() and color() to set and get the current color.

colortriangle.png

Definition at line 71 of file qtcolortriangle.h.

Constructor & Destructor Documentation

QtColorTriangle::QtColorTriangle ( QWidget * parent = 0 )

Constructs a color triangle widget with the given parent.

Definition at line 132 of file qtcolortriangle.cpp.

QtColorTriangle::~QtColorTriangle ( )

Destructs the color triangle.

Definition at line 148 of file qtcolortriangle.cpp.

QtColorTriangle::colorChanged ( const QColor & color ) [signal]

Whenever the color triangles color changes this signal is emitted with the new color.

int QtColorTriangle::heightForWidth ( int w ) const

Forces the triangle widget to always be square. Returns the value w.

Definition at line 195 of file qtcolortriangle.cpp.

void QtColorTriangle::paintEvent ( QPaintEvent * e ) [protected]

First copies a background image of the hue donut and its background color onto the frame, then draws the color triangle, and finally the selectors.

Definition at line 527 of file qtcolortriangle.cpp.

QSize QtColorTriangle::sizeHint ( ) const

Definition at line 186 of file qtcolortriangle.cpp.

The documentation for this class was generated from the following files: