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/**
* SPDX-FileCopyrightText: 2001-2015 Klaralvdalens Datakonsult AB. All rights reserved.
*
* This file is part of the KD Chart library.
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
#include "mainwindow.h"
#include <KChartChart>
#include <KChartLegend>
#include <KChartPosition>
#include <KChartLineDiagram>
#include <KChartTextAttributes>
#include <QComboBox>
#include <QLineEdit>
class LegendItem : public QTreeWidgetItem
{
public:
LegendItem( KChart::Legend* legend, QTreeWidget* parent ) :
QTreeWidgetItem( parent ), m_legend( legend ) {}
KChart::Legend* legend() const { return m_legend; }
private:
KChart::Legend* m_legend;
};
MainWindow::MainWindow( QWidget* parent ) :
QWidget( parent )
{
setupUi( this );
QHBoxLayout* chartLayout = new QHBoxLayout( chartFrame );
m_chart = new KChart::Chart();
chartLayout->addWidget( m_chart );
m_model.loadFromCSV( ":/data" );
// Set up the diagram
m_lines = new KChart::LineDiagram();
m_lines->setModel( &m_model );
m_chart->coordinatePlane()->replaceDiagram( m_lines );
QPen pen = QPen( m_lines->pen(0).color(), 2 );
pen.setStyle( Qt::DashLine );
m_lines->setPen( 0, pen );
pen = QPen( m_lines->pen(2).color(), 2 );
pen.setStyle( Qt::DashDotDotLine );
m_lines->setPen( 2, pen );
// Add at least one legend for starters
KChart::Legend* legend = new KChart::Legend( m_lines, m_chart );
legend->setPosition( KChart::Position::North );
legend->setAlignment( Qt::AlignCenter );
legend->setShowLines( false );
legend->setTitleText( tr( "Legend" ) );
legend->setOrientation( Qt::Vertical );
m_chart->addLegend( legend );
legend->show();
LegendItem* newItem = new LegendItem( legend, legendsTV );
newItem->setText( 0, tr( "North" ) );
newItem->setText( 1, tr( "no" ) );
newItem->setText( 2, tr( "Legend" ) );
newItem->setText( 3, tr( "Vertical" ) );
newItem->setText( 4, tr( "Center") );
newItem->setText( 5, tr( "MarkersOnly" ) );
alignmentMap[ Qt::AlignTop | Qt::AlignLeft] = tr("Top + Left");
alignmentMap[ Qt::AlignTop | Qt::AlignHCenter] = tr("Top + HCenter");
alignmentMap[ Qt::AlignTop | Qt::AlignRight] = tr("Top + Right");
alignmentMap[ Qt::AlignVCenter | Qt::AlignRight] = tr("VCenter + Right");
alignmentMap[ Qt::AlignBottom | Qt::AlignRight] = tr("Bottom + Right");
alignmentMap[ Qt::AlignBottom | Qt::AlignHCenter] = tr("Bottom + HCenter");
alignmentMap[ Qt::AlignBottom | Qt::AlignLeft] = tr("Bottom + Left");
alignmentMap[ Qt::AlignVCenter | Qt::AlignLeft] = tr("VCenter + Left");
alignmentMap[ Qt::AlignCenter] = tr("Center");
m_chart->update();
}
void MainWindow::initAddLegendDialog( DerivedAddLegendDialog& conf,
Qt::Alignment alignment ) const
{
conf.titleTextED->setFocus();
// Note: Legend position can be Floating but it can not be Center
const QStringList labels = KChart::Position::printableNames( KChart::Position::IncludeFloating );
const QList<QByteArray> names = KChart::Position::names( KChart::Position::IncludeFloating );
for ( int i = 0, end = qMin( labels.size(), names.size() ) ; i != end ; ++i )
conf.positionCO->addItem( labels[i], names[i] );
QMap<Qt::Alignment, QString>::const_iterator it = alignmentMap.constBegin();
while (it != alignmentMap.constEnd()) {
conf.alignmentCO->addItem( it.value() );
++it;
}
const int idx = conf.alignmentCO->findText( alignmentMap[ alignment ] );
if ( idx > -1 )
conf.alignmentCO->setCurrentIndex( idx );
}
void MainWindow::on_addLegendPB_clicked()
{
DerivedAddLegendDialog conf;
initAddLegendDialog( conf, Qt::AlignCenter );
if ( conf.exec() == QDialog::Accepted ) {
KChart::Legend* legend = new KChart::Legend( m_lines, m_chart );
m_chart->addLegend( legend );
legend->setPosition(
KChart::Position::fromName( conf.positionCO->itemData( conf.positionCO->currentIndex() ).toByteArray() ) );
// get the alignment
Qt::Alignment alignment = Qt::AlignCenter;
const QString selectedAlignment( conf.alignmentCO->currentText() );
QMap<Qt::Alignment, QString>::const_iterator i = alignmentMap.constBegin();
while ( i != alignmentMap.constEnd() ) {
if ( i.value() == selectedAlignment ) {
alignment = i.key();
break;
}
++i;
}
legend->setAlignment( alignment );
legend->setShowLines( conf.showLinesCB->isChecked() );
legend->setTitleText( conf.titleTextED->text() );
legend->setOrientation( ( conf.orientationCO->currentIndex() == 0 ) ? Qt::Vertical : Qt::Horizontal );
switch ( conf.styleCO->currentIndex() )
{
case 0:
legend->setLegendStyle( KChart::Legend::MarkersOnly );
break;
case 1:
legend->setLegendStyle( KChart::Legend::LinesOnly );
break;
case 2:
legend->setLegendStyle(KChart::Legend::MarkersAndLines );
break;
default:
legend->setLegendStyle( KChart::Legend::MarkersOnly );
break;
}
LegendItem* newItem = new LegendItem( legend, legendsTV );
newItem->setText( 0, conf.positionCO->currentText() );
newItem->setText( 1, conf.showLinesCB->isChecked() ? tr( "yes" ) : tr( "no" ) );
newItem->setText( 2, conf.titleTextED->text() );
newItem->setText( 3, conf.orientationCO->currentText() );
newItem->setText( 4, selectedAlignment );
newItem->setText( 5, conf.styleCO->currentText() );
m_chart->update();
}
}
void MainWindow::on_editLegendPB_clicked()
{
if ( legendsTV->selectedItems().size() == 0 ) return;
LegendItem* item = static_cast<LegendItem*>( legendsTV->selectedItems().first() );
KChart::Legend* legend = item->legend();
DerivedAddLegendDialog conf;
initAddLegendDialog( conf, legend->alignment() );
conf.showLinesCB->setChecked( legend->showLines() );
conf.titleTextED->setText( legend->titleText() );
legend->setLegendSymbolAlignment(Qt::AlignBottom);
// In this example we are using legend position names, that match
// exactly the names in KChart::Legend::LegendPosition,
// so we can use a shortcut here, to set the respective name in
// the dialog's list, and we need no error checking for findText():
conf.positionCO->setCurrentIndex(
conf.positionCO->findText( legend->position().printableName() ) );
conf.orientationCO->setCurrentIndex( ( legend->orientation() == Qt::Vertical ) ? 0 : 1 );
conf.styleCO->setCurrentIndex( legend->legendStyle() );
if ( conf.exec() == QDialog::Accepted ) {
//legend->setPosition( (KChart::Legend::LegendPosition)conf.positionCO->currentIndex() );
legend->setPosition(
KChart::Position::fromName( conf.positionCO->itemData( conf.positionCO->currentIndex() ).toByteArray() ) );
// get the alignment
Qt::Alignment alignment = Qt::AlignCenter;
const QString selectedAlignment( conf.alignmentCO->currentText() );
QMap<Qt::Alignment, QString>::const_iterator i = alignmentMap.constBegin();
while ( i != alignmentMap.constEnd() ) {
if ( i.value() == selectedAlignment ) {
alignment = i.key();
break;
}
++i;
}
legend->setAlignment( alignment );
legend->setShowLines( conf.showLinesCB->isChecked() );
legend->setTitleText( conf.titleTextED->text() );
legend->setOrientation( ( conf.orientationCO->currentIndex() == 0 ) ? Qt::Vertical : Qt::Horizontal );
switch ( conf.styleCO->currentIndex() )
{
case 0:
legend->setLegendStyle( KChart::Legend::MarkersOnly );
break;
case 1:
legend->setLegendStyle( KChart::Legend::LinesOnly );
break;
case 2:
legend->setLegendStyle(KChart::Legend::MarkersAndLines );
break;
default:
legend->setLegendStyle( KChart::Legend::MarkersOnly );
break;
}
item->setText( 0, conf.positionCO->currentText() );
item->setText( 1, conf.showLinesCB->isChecked() ? tr("yes") : tr("no") );
item->setText( 2, conf.titleTextED->text() );
item->setText( 3, conf.orientationCO->currentText() );
item->setText( 4, selectedAlignment );
item->setText( 5, conf.styleCO->currentText() );
m_chart->update();
}
}
void MainWindow::on_removeLegendPB_clicked()
{
if ( legendsTV->selectedItems().size() == 0 ) return;
QList<QTreeWidgetItem*> items = legendsTV->selectedItems();
for ( QList<QTreeWidgetItem*>::iterator it = items.begin();
it != items.end(); ++it )
{
KChart::Legend* legend = static_cast<LegendItem*>( (*it) )->legend();
#if 0
// Note: Despite it being owned by the Chart, you *can* just delete
// the legend: KD Chart will notice that and adjust its layout ...
delete legend;
#else
// ... but the correct way is to first take it, so the Chart is no longer owning it:
m_chart->takeLegend( legend );
// ... and then delete it:
delete legend;
#endif
delete (*it);
}
m_chart->update();
}
void MainWindow::on_legendsTV_itemSelectionChanged()
{
removeLegendPB->setEnabled( legendsTV->selectedItems().count() > 0 );
removeLegendPB->setEnabled( legendsTV->selectedItems().count() == 1 );
}
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