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qgscolorwidgets.cpp
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qgscolorwidgets.cpp
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/***************************************************************************
qgscolorwidgets.cpp - color selection widgets
---------------------
begin : September 2014
copyright : (C) 2014 by Nyall Dawson
email : nyall dot dawson at gmail dot com
***************************************************************************
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation; either version 2 of the License, or *
* (at your option) any later version. *
* *
***************************************************************************/
#include "qgscolorwidgets.h"
#include "qgsapplication.h"
#include "qgssymbollayerutils.h"
#include "qgssettings.h"
#include "qgslogger.h"
#include <QResizeEvent>
#include <QStyleOptionFrameV3>
#include <QPainter>
#include <QHBoxLayout>
#include <QSpinBox>
#include <QLineEdit>
#include <QFontMetrics>
#include <QToolButton>
#include <QMenu>
#include <QDrag>
#include <cmath>
//
// QgsColorWidget
//
QgsColorWidget::QgsColorWidget( QWidget *parent, const ColorComponent component )
: QWidget( parent )
, mCurrentColor( Qt::red )
, mComponent( component )
{
setAcceptDrops( true );
}
int QgsColorWidget::componentValue() const
{
return componentValue( mComponent );
}
QPixmap QgsColorWidget::createDragIcon( const QColor &color )
{
//craft a pixmap for the drag icon
QPixmap pixmap( 50, 50 );
pixmap.fill( Qt::transparent );
QPainter painter;
painter.begin( &pixmap );
//start with a light gray background
painter.fillRect( QRect( 0, 0, 50, 50 ), QBrush( QColor( 200, 200, 200 ) ) );
//draw rect with white border, filled with current color
QColor pixmapColor = color;
pixmapColor.setAlpha( 255 );
painter.setBrush( QBrush( pixmapColor ) );
painter.setPen( QPen( Qt::white ) );
painter.drawRect( QRect( 1, 1, 47, 47 ) );
painter.end();
return pixmap;
}
int QgsColorWidget::componentValue( const QgsColorWidget::ColorComponent component ) const
{
if ( !mCurrentColor.isValid() )
{
return -1;
}
switch ( component )
{
case QgsColorWidget::Red:
return mCurrentColor.red();
case QgsColorWidget::Green:
return mCurrentColor.green();
case QgsColorWidget::Blue:
return mCurrentColor.blue();
case QgsColorWidget::Hue:
//hue is treated specially, to avoid -1 hues values from QColor for ambiguous hues
return hue();
case QgsColorWidget::Saturation:
return mCurrentColor.hsvSaturation();
case QgsColorWidget::Value:
return mCurrentColor.value();
case QgsColorWidget::Alpha:
return mCurrentColor.alpha();
default:
return -1;
}
}
int QgsColorWidget::componentRange() const
{
return componentRange( mComponent );
}
int QgsColorWidget::componentRange( const QgsColorWidget::ColorComponent component ) const
{
if ( component == QgsColorWidget::Multiple )
{
//no component
return -1;
}
if ( component == QgsColorWidget::Hue )
{
//hue ranges to 359
return 359;
}
else
{
//all other components range to 255
return 255;
}
}
int QgsColorWidget::hue() const
{
if ( mCurrentColor.hue() >= 0 )
{
return mCurrentColor.hue();
}
else
{
return mExplicitHue;
}
}
void QgsColorWidget::alterColor( QColor &color, const QgsColorWidget::ColorComponent component, const int newValue ) const
{
int h, s, v, a;
color.getHsv( &h, &s, &v, &a );
//clip value to sensible range
int clippedValue = std::min( std::max( 0, newValue ), componentRange( component ) );
switch ( component )
{
case QgsColorWidget::Red:
color.setRed( clippedValue );
return;
case QgsColorWidget::Green:
color.setGreen( clippedValue );
return;
case QgsColorWidget::Blue:
color.setBlue( clippedValue );
return;
case QgsColorWidget::Hue:
color.setHsv( clippedValue, s, v, a );
return;
case QgsColorWidget::Saturation:
color.setHsv( h, clippedValue, v, a );
return;
case QgsColorWidget::Value:
color.setHsv( h, s, clippedValue, a );
return;
case QgsColorWidget::Alpha:
color.setAlpha( clippedValue );
return;
default:
return;
}
}
const QPixmap &QgsColorWidget::transparentBackground()
{
static QPixmap sTranspBkgrd;
if ( sTranspBkgrd.isNull() )
sTranspBkgrd = QgsApplication::getThemePixmap( QStringLiteral( "/transp-background_8x8.png" ) );
return sTranspBkgrd;
}
void QgsColorWidget::dragEnterEvent( QDragEnterEvent *e )
{
//is dragged data valid color data?
bool hasAlpha;
QColor mimeColor = QgsSymbolLayerUtils::colorFromMimeData( e->mimeData(), hasAlpha );
if ( mimeColor.isValid() )
{
//if so, we accept the drag
e->acceptProposedAction();
}
}
void QgsColorWidget::dropEvent( QDropEvent *e )
{
//is dropped data valid color data?
bool hasAlpha = false;
QColor mimeColor = QgsSymbolLayerUtils::colorFromMimeData( e->mimeData(), hasAlpha );
if ( mimeColor.isValid() )
{
//accept drop and set new color
e->acceptProposedAction();
if ( !hasAlpha )
{
//mime color has no explicit alpha component, so keep existing alpha
mimeColor.setAlpha( mCurrentColor.alpha() );
}
setColor( mimeColor );
emit colorChanged( mCurrentColor );
}
//could not get color from mime data
}
void QgsColorWidget::mouseMoveEvent( QMouseEvent *e )
{
emit hovered();
e->accept();
//don't pass to QWidget::mouseMoveEvent, causes issues with widget used in QWidgetAction
}
void QgsColorWidget::mousePressEvent( QMouseEvent *e )
{
e->accept();
//don't pass to QWidget::mousePressEvent, causes issues with widget used in QWidgetAction
}
void QgsColorWidget::mouseReleaseEvent( QMouseEvent *e )
{
e->accept();
//don't pass to QWidget::mouseReleaseEvent, causes issues with widget used in QWidgetAction
}
QColor QgsColorWidget::color() const
{
return mCurrentColor;
}
void QgsColorWidget::setComponent( const QgsColorWidget::ColorComponent component )
{
if ( component == mComponent )
{
return;
}
mComponent = component;
update();
}
void QgsColorWidget::setComponentValue( const int value )
{
if ( mComponent == QgsColorWidget::Multiple )
{
return;
}
//clip value to valid range
int valueClipped = std::min( value, componentRange() );
valueClipped = std::max( valueClipped, 0 );
int r, g, b, a;
mCurrentColor.getRgb( &r, &g, &b, &a );
int h, s, v;
mCurrentColor.getHsv( &h, &s, &v );
//overwrite hue with explicit hue if required
h = hue();
switch ( mComponent )
{
case QgsColorWidget::Red:
if ( r == valueClipped )
{
return;
}
mCurrentColor.setRed( valueClipped );
break;
case QgsColorWidget::Green:
if ( g == valueClipped )
{
return;
}
mCurrentColor.setGreen( valueClipped );
break;
case QgsColorWidget::Blue:
if ( b == valueClipped )
{
return;
}
mCurrentColor.setBlue( valueClipped );
break;
case QgsColorWidget::Hue:
if ( h == valueClipped )
{
return;
}
mCurrentColor.setHsv( valueClipped, s, v, a );
break;
case QgsColorWidget::Saturation:
if ( s == valueClipped )
{
return;
}
mCurrentColor.setHsv( h, valueClipped, v, a );
break;
case QgsColorWidget::Value:
if ( v == valueClipped )
{
return;
}
mCurrentColor.setHsv( h, s, valueClipped, a );
break;
case QgsColorWidget::Alpha:
if ( a == valueClipped )
{
return;
}
mCurrentColor.setAlpha( valueClipped );
break;
default:
return;
}
//update recorded hue
if ( mCurrentColor.hue() >= 0 )
{
mExplicitHue = mCurrentColor.hue();
}
update();
}
void QgsColorWidget::setColor( const QColor &color, const bool emitSignals )
{
if ( color == mCurrentColor )
{
return;
}
mCurrentColor = color;
//update recorded hue
if ( color.hue() >= 0 )
{
mExplicitHue = color.hue();
}
if ( emitSignals )
{
emit colorChanged( mCurrentColor );
}
update();
}
//
// QgsColorWheel
//
QgsColorWheel::QgsColorWheel( QWidget *parent )
: QgsColorWidget( parent )
{
//create wheel hue brush - only do this once
QConicalGradient wheelGradient = QConicalGradient( 0, 0, 0 );
int wheelStops = 20;
QColor gradColor = QColor::fromHsvF( 1.0, 1.0, 1.0 );
for ( int pos = 0; pos <= wheelStops; ++pos )
{
double relativePos = ( double )pos / wheelStops;
gradColor.setHsvF( relativePos, 1, 1 );
wheelGradient.setColorAt( relativePos, gradColor );
}
mWheelBrush = QBrush( wheelGradient );
}
QgsColorWheel::~QgsColorWheel()
{
delete mWheelImage;
delete mTriangleImage;
delete mWidgetImage;
}
QSize QgsColorWheel::sizeHint() const
{
int size = Qgis::UI_SCALE_FACTOR * fontMetrics().width( QStringLiteral( "XXXXXXXXXXXXXXXXXXXXXX" ) );
return QSize( size, size );
}
void QgsColorWheel::paintEvent( QPaintEvent *event )
{
Q_UNUSED( event );
QPainter painter( this );
if ( !mWidgetImage || !mWheelImage || !mTriangleImage )
{
createImages( size() );
}
//draw everything in an image
mWidgetImage->fill( Qt::transparent );
QPainter imagePainter( mWidgetImage );
imagePainter.setRenderHint( QPainter::Antialiasing );
if ( mWheelDirty )
{
//need to redraw the wheel image
createWheel();
}
//draw wheel centered on widget
QPointF center = QPointF( width() / 2.0, height() / 2.0 );
imagePainter.drawImage( QPointF( center.x() - ( mWheelImage->width() / 2.0 ), center.y() - ( mWheelImage->height() / 2.0 ) ), *mWheelImage );
//draw hue marker
int h = hue();
double length = mWheelImage->width() / 2.0;
QLineF hueMarkerLine = QLineF( center.x(), center.y(), center.x() + length, center.y() );
hueMarkerLine.setAngle( h );
imagePainter.save();
//use sourceIn mode for nicer antialiasing
imagePainter.setCompositionMode( QPainter::CompositionMode_SourceIn );
QPen pen;
pen.setWidth( 2 );
//adapt pen color for hue
pen.setColor( h > 20 && h < 200 ? Qt::black : Qt::white );
imagePainter.setPen( pen );
imagePainter.drawLine( hueMarkerLine );
imagePainter.restore();
//draw triangle
if ( mTriangleDirty )
{
createTriangle();
}
imagePainter.drawImage( QPointF( center.x() - ( mWheelImage->width() / 2.0 ), center.y() - ( mWheelImage->height() / 2.0 ) ), *mTriangleImage );
//draw current color marker
double triangleRadius = length - mWheelThickness - 1;
//adapted from equations at https://github.com/timjb/colortriangle/blob/master/colortriangle.js by Tim Baumann
double lightness = mCurrentColor.lightnessF();
double hueRadians = ( h * M_PI / 180.0 );
double hx = std::cos( hueRadians ) * triangleRadius;
double hy = -std::sin( hueRadians ) * triangleRadius;
double sx = -std::cos( -hueRadians + ( M_PI / 3.0 ) ) * triangleRadius;
double sy = -std::sin( -hueRadians + ( M_PI / 3.0 ) ) * triangleRadius;
double vx = -std::cos( hueRadians + ( M_PI / 3.0 ) ) * triangleRadius;
double vy = std::sin( hueRadians + ( M_PI / 3.0 ) ) * triangleRadius;
double mx = ( sx + vx ) / 2.0;
double my = ( sy + vy ) / 2.0;
double a = ( 1 - 2.0 * std::fabs( lightness - 0.5 ) ) * mCurrentColor.hslSaturationF();
double x = sx + ( vx - sx ) * lightness + ( hx - mx ) * a;
double y = sy + ( vy - sy ) * lightness + ( hy - my ) * a;
//adapt pen color for lightness
pen.setColor( lightness > 0.7 ? Qt::black : Qt::white );
imagePainter.setPen( pen );
imagePainter.setBrush( Qt::NoBrush );
imagePainter.drawEllipse( QPointF( x + center.x(), y + center.y() ), 4.0, 4.0 );
imagePainter.end();
//draw image onto widget
painter.drawImage( QPoint( 0, 0 ), *mWidgetImage );
painter.end();
}
void QgsColorWheel::setColor( const QColor &color, const bool emitSignals )
{
if ( color.hue() >= 0 && color.hue() != hue() )
{
//hue has changed, need to redraw the triangle
mTriangleDirty = true;
}
QgsColorWidget::setColor( color, emitSignals );
}
void QgsColorWheel::createImages( const QSizeF size )
{
double wheelSize = std::min( size.width(), size.height() ) - mMargin * 2.0;
mWheelThickness = wheelSize / 15.0;
//recreate cache images at correct size
delete mWheelImage;
mWheelImage = new QImage( wheelSize, wheelSize, QImage::Format_ARGB32 );
delete mTriangleImage;
mTriangleImage = new QImage( wheelSize, wheelSize, QImage::Format_ARGB32 );
delete mWidgetImage;
mWidgetImage = new QImage( size.width(), size.height(), QImage::Format_ARGB32 );
//trigger a redraw for the images
mWheelDirty = true;
mTriangleDirty = true;
}
void QgsColorWheel::resizeEvent( QResizeEvent *event )
{
//recreate images for new size
createImages( event->size() );
QgsColorWidget::resizeEvent( event );
}
void QgsColorWheel::setColorFromPos( const QPointF pos )
{
QPointF center = QPointF( width() / 2.0, height() / 2.0 );
//line from center to mouse position
QLineF line = QLineF( center.x(), center.y(), pos.x(), pos.y() );
QColor newColor = QColor();
int h, s, l, alpha;
mCurrentColor.getHsl( &h, &s, &l, &alpha );
//override hue with explicit hue, so we don't get -1 values from QColor for hue
h = hue();
if ( mClickedPart == QgsColorWheel::Triangle )
{
//adapted from equations at https://github.com/timjb/colortriangle/blob/master/colortriangle.js by Tim Baumann
//position of event relative to triangle center
double x = pos.x() - center.x();
double y = pos.y() - center.y();
double eventAngleRadians = line.angle() * M_PI / 180.0;
double hueRadians = h * M_PI / 180.0;
double rad0 = std::fmod( eventAngleRadians + 2.0 * M_PI - hueRadians, 2.0 * M_PI );
double rad1 = std::fmod( rad0, ( ( 2.0 / 3.0 ) * M_PI ) ) - ( M_PI / 3.0 );
double length = mWheelImage->width() / 2.0;
double triangleLength = length - mWheelThickness - 1;
double a = 0.5 * triangleLength;
double b = std::tan( rad1 ) * a;
double r = std::sqrt( x * x + y * y );
double maxR = std::sqrt( a * a + b * b );
if ( r > maxR )
{
double dx = std::tan( rad1 ) * r;
double rad2 = std::atan( dx / maxR );
rad2 = std::min( rad2, M_PI / 3.0 );
rad2 = std::max( rad2, -M_PI / 3.0 );
eventAngleRadians += rad2 - rad1;
rad0 = std::fmod( eventAngleRadians + 2.0 * M_PI - hueRadians, 2.0 * M_PI );
rad1 = std::fmod( rad0, ( ( 2.0 / 3.0 ) * M_PI ) ) - ( M_PI / 3.0 );
b = std::tan( rad1 ) * a;
r = std::sqrt( a * a + b * b );
}
double triangleSideLength = std::sqrt( 3.0 ) * triangleLength;
double newL = ( ( -std::sin( rad0 ) * r ) / triangleSideLength ) + 0.5;
double widthShare = 1.0 - ( std::fabs( newL - 0.5 ) * 2.0 );
double newS = ( ( ( std::cos( rad0 ) * r ) + ( triangleLength / 2.0 ) ) / ( 1.5 * triangleLength ) ) / widthShare;
s = std::min( static_cast< int >( std::round( std::max( 0.0, newS ) * 255.0 ) ), 255 );
l = std::min( static_cast< int >( std::round( std::max( 0.0, newL ) * 255.0 ) ), 255 );
newColor = QColor::fromHsl( h, s, l );
//explicitly set the hue again, so that it's exact
newColor.setHsv( h, newColor.hsvSaturation(), newColor.value(), alpha );
}
else if ( mClickedPart == QgsColorWheel::Wheel )
{
//use hue angle
s = mCurrentColor.hsvSaturation();
int v = mCurrentColor.value();
int newHue = line.angle();
newColor = QColor::fromHsv( newHue, s, v, alpha );
//hue has changed, need to redraw triangle
mTriangleDirty = true;
}
if ( newColor.isValid() && newColor != mCurrentColor )
{
//color has changed
mCurrentColor = QColor( newColor );
if ( mCurrentColor.hue() >= 0 )
{
//color has a valid hue, so update the QgsColorWidget's explicit hue
mExplicitHue = mCurrentColor.hue();
}
update();
emit colorChanged( mCurrentColor );
}
}
void QgsColorWheel::mouseMoveEvent( QMouseEvent *event )
{
setColorFromPos( event->pos() );
QgsColorWidget::mouseMoveEvent( event );
}
void QgsColorWheel::mousePressEvent( QMouseEvent *event )
{
//calculate where the event occurred -- on the wheel or inside the triangle?
//create a line from the widget's center to the event
QLineF line = QLineF( width() / 2.0, height() / 2.0, event->pos().x(), event->pos().y() );
double innerLength = mWheelImage->width() / 2.0 - mWheelThickness;
if ( line.length() < innerLength )
{
mClickedPart = QgsColorWheel::Triangle;
}
else
{
mClickedPart = QgsColorWheel::Wheel;
}
setColorFromPos( event->pos() );
}
void QgsColorWheel::mouseReleaseEvent( QMouseEvent *event )
{
Q_UNUSED( event );
mClickedPart = QgsColorWheel::None;
}
void QgsColorWheel::createWheel()
{
if ( !mWheelImage )
{
return;
}
int maxSize = std::min( mWheelImage->width(), mWheelImage->height() );
double wheelRadius = maxSize / 2.0;
mWheelImage->fill( Qt::transparent );
QPainter p( mWheelImage );
p.setRenderHint( QPainter::Antialiasing );
p.setBrush( mWheelBrush );
p.setPen( Qt::NoPen );
//draw hue wheel as a circle
p.translate( wheelRadius, wheelRadius );
p.drawEllipse( QPointF( 0.0, 0.0 ), wheelRadius, wheelRadius );
//cut hole in center of circle to make a ring
p.setCompositionMode( QPainter::CompositionMode_DestinationOut );
p.setBrush( QBrush( Qt::black ) );
p.drawEllipse( QPointF( 0.0, 0.0 ), wheelRadius - mWheelThickness, wheelRadius - mWheelThickness );
p.end();
mWheelDirty = false;
}
void QgsColorWheel::createTriangle()
{
if ( !mWheelImage || !mTriangleImage )
{
return;
}
QPointF center = QPointF( mWheelImage->width() / 2.0, mWheelImage->height() / 2.0 );
mTriangleImage->fill( Qt::transparent );
QPainter imagePainter( mTriangleImage );
imagePainter.setRenderHint( QPainter::Antialiasing );
int angle = hue();
double wheelRadius = mWheelImage->width() / 2.0;
double triangleRadius = wheelRadius - mWheelThickness - 1;
//pure version of hue (at full saturation and value)
QColor pureColor = QColor::fromHsv( angle, 255, 255 );
//create copy of color but with 0 alpha
QColor alphaColor = QColor( pureColor );
alphaColor.setAlpha( 0 );
//some rather ugly shortcuts to obtain corners and midpoints of triangle
QLineF line1 = QLineF( center.x(), center.y(), center.x() - triangleRadius * std::cos( M_PI / 3.0 ), center.y() - triangleRadius * std::sin( M_PI / 3.0 ) );
QLineF line2 = QLineF( center.x(), center.y(), center.x() + triangleRadius, center.y() );
QLineF line3 = QLineF( center.x(), center.y(), center.x() - triangleRadius * std::cos( M_PI / 3.0 ), center.y() + triangleRadius * std::sin( M_PI / 3.0 ) );
QLineF line4 = QLineF( center.x(), center.y(), center.x() - triangleRadius * std::cos( M_PI / 3.0 ), center.y() );
QLineF line5 = QLineF( center.x(), center.y(), ( line2.p2().x() + line1.p2().x() ) / 2.0, ( line2.p2().y() + line1.p2().y() ) / 2.0 );
line1.setAngle( line1.angle() + angle );
line2.setAngle( line2.angle() + angle );
line3.setAngle( line3.angle() + angle );
line4.setAngle( line4.angle() + angle );
line5.setAngle( line5.angle() + angle );
QPointF p1 = line1.p2();
QPointF p2 = line2.p2();
QPointF p3 = line3.p2();
QPointF p4 = line4.p2();
QPointF p5 = line5.p2();
//inspired by Tim Baumann's work at https://github.com/timjb/colortriangle/blob/master/colortriangle.js
QLinearGradient colorGrad = QLinearGradient( p4.x(), p4.y(), p2.x(), p2.y() );
colorGrad.setColorAt( 0, alphaColor );
colorGrad.setColorAt( 1, pureColor );
QLinearGradient whiteGrad = QLinearGradient( p3.x(), p3.y(), p5.x(), p5.y() );
whiteGrad.setColorAt( 0, QColor( 255, 255, 255, 255 ) );
whiteGrad.setColorAt( 1, QColor( 255, 255, 255, 0 ) );
QPolygonF triangle;
triangle << p2 << p1 << p3 << p2;
imagePainter.setPen( Qt::NoPen );
//start with a black triangle
imagePainter.setBrush( QBrush( Qt::black ) );
imagePainter.drawPolygon( triangle );
//draw a gradient from transparent to the pure color at the triangle's tip
imagePainter.setBrush( QBrush( colorGrad ) );
imagePainter.drawPolygon( triangle );
//draw a white gradient using additive composition mode
imagePainter.setCompositionMode( QPainter::CompositionMode_Plus );
imagePainter.setBrush( QBrush( whiteGrad ) );
imagePainter.drawPolygon( triangle );
//above process results in some small artifacts on the edge of the triangle. Let's clear these up
//use source composition mode and draw an outline using a transparent pen
//this clears the edge pixels and leaves a nice smooth image
imagePainter.setCompositionMode( QPainter::CompositionMode_Source );
imagePainter.setBrush( Qt::NoBrush );
imagePainter.setPen( QPen( Qt::transparent ) );
imagePainter.drawPolygon( triangle );
imagePainter.end();
mTriangleDirty = false;
}
//
// QgsColorBox
//
QgsColorBox::QgsColorBox( QWidget *parent, const ColorComponent component )
: QgsColorWidget( parent, component )
{
setFocusPolicy( Qt::StrongFocus );
setSizePolicy( QSizePolicy::MinimumExpanding, QSizePolicy::MinimumExpanding );
mBoxImage = new QImage( width() - mMargin * 2, height() - mMargin * 2, QImage::Format_RGB32 );
}
QgsColorBox::~QgsColorBox()
{
delete mBoxImage;
}
QSize QgsColorBox::sizeHint() const
{
int size = Qgis::UI_SCALE_FACTOR * fontMetrics().width( QStringLiteral( "XXXXXXXXXXXXXXXXXXXXXX" ) );
return QSize( size, size );
}
void QgsColorBox::paintEvent( QPaintEvent *event )
{
Q_UNUSED( event );
QPainter painter( this );
QStyleOptionFrame option;
option.initFrom( this );
option.state = hasFocus() ? QStyle::State_Active : QStyle::State_None;
style()->drawPrimitive( QStyle::PE_Frame, &option, &painter );
if ( mDirty )
{
createBox();
}
//draw background image
painter.drawImage( QPoint( mMargin, mMargin ), *mBoxImage );
//draw cross lines
double xPos = mMargin + ( width() - 2 * mMargin - 1 ) * ( double )xComponentValue() / ( double )valueRangeX();
double yPos = mMargin + ( height() - 2 * mMargin - 1 ) - ( height() - 2 * mMargin - 1 ) * ( double )yComponentValue() / ( double )valueRangeY();
painter.setBrush( Qt::white );
painter.setPen( Qt::NoPen );
painter.drawRect( xPos - 1, mMargin, 3, height() - 2 * mMargin - 1 );
painter.drawRect( mMargin, yPos - 1, width() - 2 * mMargin - 1, 3 );
painter.setPen( Qt::black );
painter.drawLine( xPos, mMargin, xPos, height() - mMargin - 1 );
painter.drawLine( mMargin, yPos, width() - mMargin - 1, yPos );
painter.end();
}
void QgsColorBox::setComponent( const QgsColorWidget::ColorComponent component )
{
if ( component != mComponent )
{
//need to redraw
mDirty = true;
}
QgsColorWidget::setComponent( component );
}
void QgsColorBox::setColor( const QColor &color, const bool emitSignals )
{
//check if we need to redraw the box image
if ( mComponent == QgsColorWidget::Red && mCurrentColor.red() != color.red() )
{
mDirty = true;
}
else if ( mComponent == QgsColorWidget::Green && mCurrentColor.green() != color.green() )
{
mDirty = true;
}
else if ( mComponent == QgsColorWidget::Blue && mCurrentColor.blue() != color.blue() )
{
mDirty = true;
}
else if ( mComponent == QgsColorWidget::Hue && color.hsvHue() >= 0 && hue() != color.hsvHue() )
{
mDirty = true;
}
else if ( mComponent == QgsColorWidget::Saturation && mCurrentColor.hsvSaturation() != color.hsvSaturation() )
{
mDirty = true;
}
else if ( mComponent == QgsColorWidget::Value && mCurrentColor.value() != color.value() )
{
mDirty = true;
}
QgsColorWidget::setColor( color, emitSignals );
}
void QgsColorBox::resizeEvent( QResizeEvent *event )
{
mDirty = true;
delete mBoxImage;
mBoxImage = new QImage( event->size().width() - mMargin * 2, event->size().height() - mMargin * 2, QImage::Format_RGB32 );
QgsColorWidget::resizeEvent( event );
}
void QgsColorBox::mouseMoveEvent( QMouseEvent *event )
{
setColorFromPoint( event->pos() );
QgsColorWidget::mouseMoveEvent( event );
}
void QgsColorBox::mousePressEvent( QMouseEvent *event )
{
setColorFromPoint( event->pos() );
}
void QgsColorBox::createBox()
{
int maxValueX = mBoxImage->width();
int maxValueY = mBoxImage->height();
//create a temporary color object
QColor currentColor = QColor( mCurrentColor );
int colorComponentValue;
for ( int y = 0; y < maxValueY; ++y )
{
QRgb *scanLine = ( QRgb * )mBoxImage->scanLine( y );
colorComponentValue = int( valueRangeY() - valueRangeY() * ( double( y ) / maxValueY ) );
alterColor( currentColor, yComponent(), colorComponentValue );
for ( int x = 0; x < maxValueX; ++x )
{
colorComponentValue = int( valueRangeX() * ( double( x ) / maxValueX ) );
alterColor( currentColor, xComponent(), colorComponentValue );
scanLine[x] = currentColor.rgb();
}
}
mDirty = false;
}
int QgsColorBox::valueRangeX() const
{
return componentRange( xComponent() );
}
int QgsColorBox::valueRangeY() const
{
return componentRange( yComponent() );
}
QgsColorWidget::ColorComponent QgsColorBox::yComponent() const
{
switch ( mComponent )
{
case QgsColorWidget::Red:
return QgsColorWidget::Green;
case QgsColorWidget:: Green:
case QgsColorWidget:: Blue:
return QgsColorWidget::Red;
case QgsColorWidget::Hue:
return QgsColorWidget:: Saturation;
case QgsColorWidget:: Saturation:
case QgsColorWidget:: Value:
return QgsColorWidget::Hue;
default:
//should not occur
return QgsColorWidget::Red;
}
}
int QgsColorBox::yComponentValue() const
{
return componentValue( yComponent() );
}
QgsColorWidget::ColorComponent QgsColorBox::xComponent() const
{
switch ( mComponent )
{
case QgsColorWidget::Red:
case QgsColorWidget:: Green:
return QgsColorWidget::Blue;
case QgsColorWidget:: Blue:
return QgsColorWidget::Green;
case QgsColorWidget::Hue:
case QgsColorWidget:: Saturation:
return QgsColorWidget:: Value;
case QgsColorWidget:: Value:
return QgsColorWidget::Saturation;
default:
//should not occur
return QgsColorWidget::Red;
}
}
int QgsColorBox::xComponentValue() const
{
return componentValue( xComponent() );
}
void QgsColorBox::setColorFromPoint( QPoint point )
{
int valX = valueRangeX() * ( point.x() - mMargin ) / ( width() - 2 * mMargin - 1 );
valX = std::min( std::max( valX, 0 ), valueRangeX() );
int valY = valueRangeY() - valueRangeY() * ( point.y() - mMargin ) / ( height() - 2 * mMargin - 1 );
valY = std::min( std::max( valY, 0 ), valueRangeY() );
QColor color = QColor( mCurrentColor );
alterColor( color, xComponent(), valX );
alterColor( color, yComponent(), valY );
if ( color == mCurrentColor )
{
return;
}
if ( color.hue() >= 0 )
{
mExplicitHue = color.hue();
}
mCurrentColor = color;
update();
emit colorChanged( color );
}
//
// QgsColorRampWidget
//
QgsColorRampWidget::QgsColorRampWidget( QWidget *parent,
const QgsColorWidget::ColorComponent component,
const Orientation orientation )
: QgsColorWidget( parent, component )
{
setFocusPolicy( Qt::StrongFocus );
setOrientation( orientation );
//create triangle polygons
setMarkerSize( 5 );
}
QSize QgsColorRampWidget::sizeHint() const
{
if ( mOrientation == QgsColorRampWidget::Horizontal )
{
//horizontal
return QSize( Qgis::UI_SCALE_FACTOR * fontMetrics().width( QStringLiteral( "XXXXXXXXXXXXXXXXXXXXXX" ) ), Qgis::UI_SCALE_FACTOR * fontMetrics().height() * 1.3 );
}
else
{
//vertical
return QSize( Qgis::UI_SCALE_FACTOR * fontMetrics().height() * 1.3, Qgis::UI_SCALE_FACTOR * fontMetrics().width( QStringLiteral( "XXXXXXXXXXXXXXXXXXXXXX" ) ) );
}
}
void QgsColorRampWidget::paintEvent( QPaintEvent *event )
{
Q_UNUSED( event );
QPainter painter( this );
if ( mShowFrame )
{
//draw frame
QStyleOptionFrame option;
option.initFrom( this );
option.state = hasFocus() ? QStyle::State_KeyboardFocusChange : QStyle::State_None;
style()->drawPrimitive( QStyle::PE_Frame, &option, &painter );