Released version 6.1.3

examples/tvplot/main.cpp

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+#include <qapplication.h>
+#include <qmainwindow.h>
+#include <qtoolbar.h>
+#include <qtoolbutton.h>
+#include <qcombobox.h>
+#include "tvplot.h"
+
+class MainWindow: public QMainWindow
+{
+public:
+    MainWindow( QWidget * = NULL );
+
+private:
+    TVPlot *d_plot;
+};
+
+MainWindow::MainWindow( QWidget *parent ):
+    QMainWindow( parent )
+{
+    d_plot = new TVPlot( this );
+    setCentralWidget( d_plot );
+
+    QToolBar *toolBar = new QToolBar( this );
+
+    QComboBox *typeBox = new QComboBox( toolBar );
+    typeBox->addItem( "Outline" );
+    typeBox->addItem( "Columns" );
+    typeBox->addItem( "Lines" );
+    typeBox->addItem( "Column Symbol" );
+    typeBox->setCurrentIndex( typeBox->count() - 1 );
+    typeBox->setSizePolicy( QSizePolicy::Fixed, QSizePolicy::Fixed );
+
+    QToolButton *btnExport = new QToolButton( toolBar );
+    btnExport->setText( "Export" );
+    btnExport->setToolButtonStyle( Qt::ToolButtonTextUnderIcon );
+    connect( btnExport, SIGNAL( clicked() ), d_plot, SLOT( exportPlot() ) );
+
+    toolBar->addWidget( typeBox );
+    toolBar->addWidget( btnExport );
+    addToolBar( toolBar );
+
+    d_plot->setMode( typeBox->currentIndex() );
+    connect( typeBox, SIGNAL( currentIndexChanged( int ) ),
+             d_plot, SLOT( setMode( int ) ) );
+}
+
+int main( int argc, char **argv )
+{
+    QApplication a( argc, argv );
+
+    MainWindow mainWindow;
+
+    mainWindow.resize( 600, 400 );
+    mainWindow.show();
+
+    return a.exec();
+}

examples/tvplot/tvplot.cpp

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+#include "tvplot.h"
+#include <qwt_plot_layout.h>
+#include <qwt_plot_canvas.h>
+#include <qwt_plot_renderer.h>
+#include <qwt_legend.h>
+#include <qwt_legend_label.h>
+#include <qwt_plot_grid.h>
+#include <qwt_plot_histogram.h>
+#include <qwt_column_symbol.h>
+#include <qwt_series_data.h>
+#include <qpen.h>
+#include <stdlib.h>
+
+class Histogram: public QwtPlotHistogram
+{
+public:
+    Histogram( const QString &, const QColor & );
+
+    void setColor( const QColor & );
+    void setValues( uint numValues, const double * );
+};
+
+Histogram::Histogram( const QString &title, const QColor &symbolColor ):
+    QwtPlotHistogram( title )
+{
+    setStyle( QwtPlotHistogram::Columns );
+
+    setColor( symbolColor );
+}
+
+void Histogram::setColor( const QColor &color )
+{
+    QColor c = color;
+    c.setAlpha( 180 );
+    setBrush( QBrush( c ) );
+}
+
+void Histogram::setValues( uint numValues, const double *values )
+{
+    QVector<QwtIntervalSample> samples( numValues );
+    for ( uint i = 0; i < numValues; i++ )
+    {
+        QwtInterval interval( double( i ), i + 1.0 );
+        interval.setBorderFlags( QwtInterval::ExcludeMaximum );
+
+        samples[i] = QwtIntervalSample( values[i], interval );
+    }
+
+    setData( new QwtIntervalSeriesData( samples ) );
+}
+
+TVPlot::TVPlot( QWidget *parent ):
+    QwtPlot( parent )
+{
+    setTitle( "Watching TV during a weekend" );
+
+    QwtPlotCanvas *canvas = new QwtPlotCanvas();
+    canvas->setPalette( Qt::gray );
+    canvas->setBorderRadius( 10 );
+    setCanvas( canvas );
+
+    plotLayout()->setAlignCanvasToScales( true );
+
+    setAxisTitle( QwtPlot::yLeft, "Number of People" );
+    setAxisTitle( QwtPlot::xBottom, "Number of Hours" );
+
+    QwtLegend *legend = new QwtLegend;
+    legend->setDefaultItemMode( QwtLegendData::Checkable );
+    insertLegend( legend, QwtPlot::RightLegend );
+
+    populate();
+
+    connect( legend, SIGNAL( checked( const QVariant &, bool, int ) ),
+        SLOT( showItem( const QVariant &, bool ) ) );
+
+    replot(); // creating the legend items
+
+    QwtPlotItemList items = itemList( QwtPlotItem::Rtti_PlotHistogram );
+    for ( int i = 0; i < items.size(); i++ )
+    {
+        if ( i == 0 )
+        {
+            const QVariant itemInfo = itemToInfo( items[i] );
+
+            QwtLegendLabel *legendLabel =
+                qobject_cast<QwtLegendLabel *>( legend->legendWidget( itemInfo ) );
+            if ( legendLabel )
+                legendLabel->setChecked( true );
+
+            items[i]->setVisible( true );
+        }
+        else
+        {
+            items[i]->setVisible( false );
+        }
+    }
+
+    setAutoReplot( true );
+}
+
+void TVPlot::populate()
+{
+    QwtPlotGrid *grid = new QwtPlotGrid;
+    grid->enableX( false );
+    grid->enableY( true );
+    grid->enableXMin( false );
+    grid->enableYMin( false );
+    grid->setMajorPen( Qt::black, 0, Qt::DotLine );
+    grid->attach( this );
+
+    const double juneValues[] = { 7, 19, 24, 32, 10, 5, 3 };
+    const double novemberValues[] = { 4, 15, 22, 34, 13, 8, 4 };
+
+    Histogram *histogramJune = new Histogram( "Summer", Qt::red );
+    histogramJune->setValues(
+        sizeof( juneValues ) / sizeof( double ), juneValues );
+    histogramJune->attach( this );
+
+    Histogram *histogramNovember = new Histogram( "Winter", Qt::blue );
+    histogramNovember->setValues(
+        sizeof( novemberValues ) / sizeof( double ), novemberValues );
+    histogramNovember->attach( this );
+}
+
+void TVPlot::exportPlot()
+{
+    QwtPlotRenderer renderer;
+    renderer.exportTo( this, "tvplot.pdf" );
+}
+
+void TVPlot::setMode( int mode )
+{
+    QwtPlotItemList items = itemList( QwtPlotItem::Rtti_PlotHistogram );
+
+    for ( int i = 0; i < items.size(); i++ )
+    {
+        QwtPlotHistogram *histogram = static_cast<QwtPlotHistogram *>( items[i] );
+        if ( mode < 3 )
+        {
+            histogram->setStyle( static_cast<QwtPlotHistogram::HistogramStyle>( mode ) );
+            histogram->setSymbol( NULL );
+
+            QPen pen( Qt::black, 0 );
+            if ( mode == QwtPlotHistogram::Lines )
+                pen.setBrush( histogram->brush() );
+
+            histogram->setPen( pen );
+        }
+        else
+        {
+            histogram->setStyle( QwtPlotHistogram::Columns );
+
+            QwtColumnSymbol *symbol = new QwtColumnSymbol( QwtColumnSymbol::Box );
+            symbol->setFrameStyle( QwtColumnSymbol::Raised );
+            symbol->setLineWidth( 2 );
+            symbol->setPalette( QPalette( histogram->brush().color() ) );
+
+            histogram->setSymbol( symbol );
+        }
+    }
+}
+
+void TVPlot::showItem( const QVariant &itemInfo, bool on )
+{
+    QwtPlotItem *plotItem = infoToItem( itemInfo );
+    if ( plotItem )
+        plotItem->setVisible( on );
+}
+

examples/tvplot/tvplot.h

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+#ifndef _TV_PLOT_H_
+
+#include <qwt_plot.h>
+
+class TVPlot: public QwtPlot
+{
+    Q_OBJECT
+
+public:
+    TVPlot( QWidget * = NULL );
+
+public Q_SLOTS:
+    void setMode( int );
+    void exportPlot();
+
+private:
+    void populate();
+
+private Q_SLOTS:
+    void showItem( const QVariant &, bool on );
+};
+
+#endif

examples/tvplot/tvplot.pro

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+################################################################
+# Qwt Widget Library
+# Copyright (C) 1997   Josef Wilgen
+# Copyright (C) 2002   Uwe Rathmann
+#
+# This library is free software; you can redistribute it and/or
+# modify it under the terms of the Qwt License, Version 1.0
+################################################################
+
+include( $${PWD}/../examples.pri )
+
+TARGET   = tvplot
+
+SOURCES = \
+    tvplot.cpp \
+    main.cpp
+
+HEADERS = \
+    tvplot.h