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qgscontinuouscolordialog.cpp
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qgscontinuouscolordialog.cpp
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/***************************************************************************
qgscontinuouscolordialog.cpp
Continuous color renderer dialog
-------------------
begin : 2004-02-11
copyright : (C) 2004 by Gary E.Sherman
email : sherman at mrcc.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. *
* *
***************************************************************************/
/* $Id$ */
#include "qgscontinuouscolordialog.h"
#include "qgscontinuouscolorrenderer.h"
#include "qgis.h"
#include "qgsfield.h"
#include "qgssymbol.h"
#include "qgsvectordataprovider.h"
#include "qgsvectorlayer.h"
#include "qgslogger.h"
#include <QColorDialog>
QgsContinuousColorDialog::QgsContinuousColorDialog( QgsVectorLayer * layer )
: QDialog(), mVectorLayer( layer )
{
setupUi( this );
QgsDebugMsg( "entered." );
QObject::connect( btnMinValue, SIGNAL( clicked() ), this, SLOT( selectMinimumColor() ) );
QObject::connect( btnMaxValue, SIGNAL( clicked() ), this, SLOT( selectMaximumColor() ) );
//find out the numerical fields of mVectorLayer
const QgsFieldMap & fields = mVectorLayer->pendingFields();
for ( QgsFieldMap::const_iterator it = fields.begin(); it != fields.end(); ++it )
{
QVariant::Type type = it->type();
if ( type == QVariant::Int || type == QVariant::Double )
{
classificationComboBox->addItem( it->name(), it.key() );
}
}
//restore the correct colors for minimum and maximum values
const QgsContinuousColorRenderer* renderer = dynamic_cast < const QgsContinuousColorRenderer * >( layer->renderer() );;
if ( renderer )
{
classificationComboBox->setCurrentIndex( classificationComboBox->findData( renderer->classificationField() ) );
const QgsSymbol* minsymbol = renderer->minimumSymbol();
const QgsSymbol* maxsymbol = renderer->maximumSymbol();
if ( mVectorLayer->geometryType() == QGis::Line || mVectorLayer->geometryType() == QGis::Point )
{
btnMinValue->setColor( minsymbol->pen().color() );
btnMaxValue->setColor( maxsymbol->pen().color() );
}
else
{
btnMinValue->setColor( minsymbol->brush().color() );
btnMaxValue->setColor( maxsymbol->brush().color() );
}
outlinewidthspinbox->setMinimum( 0 );
outlinewidthspinbox->setValue( minsymbol->pen().widthF() );
if ( renderer->drawPolygonOutline() )
{
cb_polygonOutline->setCheckState( Qt::Checked );
}
else
{
cb_polygonOutline->setCheckState( Qt::Unchecked );
}
if ( mVectorLayer->geometryType() != QGis::Polygon )
{
cb_polygonOutline->setVisible( false );
}
}
else
{
cb_polygonOutline->setCheckState( Qt::Checked );
outlinewidthspinbox->setValue( DEFAULT_LINE_WIDTH );
if ( mVectorLayer->geometryType() != QGis::Polygon )
cb_polygonOutline->setVisible( false );
btnMinValue->setColor( Qt::black );
btnMaxValue->setColor( Qt::white );
}
// Ensure that the state of other widgets is appropriate for the
// state of the polygonoutline checkbox.
on_cb_polygonOutline_clicked();
}
QgsContinuousColorDialog::QgsContinuousColorDialog()
{
setupUi( this );
QgsDebugMsg( "entered." );
}
QgsContinuousColorDialog::~QgsContinuousColorDialog()
{
QgsDebugMsg( "entered." );
}
void QgsContinuousColorDialog::apply()
{
int classfield = classificationComboBox->itemData( classificationComboBox->currentIndex() ).toInt();
//find the minimum and maximum for the classification variable
double minimum, maximum;
QgsVectorDataProvider *provider = dynamic_cast<QgsVectorDataProvider*>( mVectorLayer->dataProvider() );
if ( provider )
{
minimum = provider->minimumValue( classfield ).toDouble();
maximum = provider->maximumValue( classfield ).toDouble();
}
else
{
QgsDebugMsg( "Warning, provider is null" );
return;
}
//create the render items for minimum and maximum value
QgsSymbol* minsymbol = new QgsSymbol( mVectorLayer->geometryType(), QString::number( minimum, 'f' ), "", "" );
QPen minPen;
minPen.setColor( btnMinValue->color() );
minPen.setWidthF( outlinewidthspinbox->value() );
if ( mVectorLayer->geometryType() == QGis::Line || mVectorLayer->geometryType() == QGis::Point )
{
minsymbol->setPen( minPen );
}
else
{
minsymbol->setBrush( QBrush( btnMinValue->color() ) );
minsymbol->setPen( minPen );
}
QgsSymbol* maxsymbol = new QgsSymbol( mVectorLayer->geometryType(), QString::number( maximum, 'f' ), "", "" );
QPen maxPen;
maxPen.setColor( btnMaxValue->color() );
maxPen.setWidthF( outlinewidthspinbox->value() );
if ( mVectorLayer->geometryType() == QGis::Line || mVectorLayer->geometryType() == QGis::Point )
{
maxsymbol->setPen( maxPen );
}
else
{
maxsymbol->setBrush( QBrush( btnMaxValue->color() ) );
maxsymbol->setPen( maxPen );
}
QgsContinuousColorRenderer* renderer = new QgsContinuousColorRenderer( mVectorLayer->geometryType() );
mVectorLayer->setRenderer( renderer );
renderer->setMinimumSymbol( minsymbol );
renderer->setMaximumSymbol( maxsymbol );
renderer->setClassificationField( classfield );
bool drawOutline = ( cb_polygonOutline->checkState() == Qt::Checked ) ? true : false;
renderer->setDrawPolygonOutline( drawOutline );
}
void QgsContinuousColorDialog::selectMinimumColor()
{
QColor mincolor = QColorDialog::getColor( btnMinValue->color(), this );
if ( mincolor.isValid() )
{
btnMinValue->setColor( mincolor );
}
activateWindow();
}
void QgsContinuousColorDialog::selectMaximumColor()
{
QColor maxcolor = QColorDialog::getColor( btnMaxValue->color(), this );
if ( maxcolor.isValid() )
{
btnMaxValue->setColor( maxcolor );
}
activateWindow();
}
void QgsContinuousColorDialog::on_cb_polygonOutline_clicked()
{
if ( cb_polygonOutline->checkState() == Qt::Checked )
outlinewidthspinbox->setEnabled( true );
else
outlinewidthspinbox->setEnabled( false );
}