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#include <qregexp.h>
#include <qtoolbar.h>
#include <qtoolbutton.h>
#include <qlabel.h>
#include <qlayout.h>
#include <qstatusbar.h>
#include <qprinter.h>
#include <qpicture.h>
#include <qpainter.h>
#include <qprintdialog.h>
#include <qwt_counter.h>
#include <qwt_picker_machine.h>
#include <qwt_plot_zoomer.h>
#include <qwt_plot_panner.h>
#include <qwt_plot_renderer.h>
#include <qwt_text.h>
#include <qwt_math.h>
#include "pixmaps.h"
#include "plot.h"
#include "mainwindow.h"
class Zoomer: public QwtPlotZoomer
{
public:
Zoomer( int xAxis, int yAxis, QWidget *canvas ):
QwtPlotZoomer( xAxis, yAxis, canvas )
{
setTrackerMode( QwtPicker::AlwaysOff );
setRubberBand( QwtPicker::NoRubberBand );
// RightButton: zoom out by 1
// Ctrl+RightButton: zoom out to full size
setMousePattern( QwtEventPattern::MouseSelect2,
Qt::RightButton, Qt::ControlModifier );
setMousePattern( QwtEventPattern::MouseSelect3,
Qt::RightButton );
}
};
//-----------------------------------------------------------------
//
// bode.cpp -- A demo program featuring QwtPlot and QwtCounter
//
// This example demonstrates the mapping of different curves
// to different axes in a QwtPlot widget. It also shows how to
// display the cursor position and how to implement zooming.
//
//-----------------------------------------------------------------
MainWindow::MainWindow( QWidget *parent ):
QMainWindow( parent )
{
d_plot = new Plot( this );
const int margin = 5;
d_plot->setContentsMargins( margin, margin, margin, 0 );
setContextMenuPolicy( Qt::NoContextMenu );
d_zoomer[0] = new Zoomer( QwtPlot::xBottom, QwtPlot::yLeft,
d_plot->canvas() );
d_zoomer[0]->setRubberBand( QwtPicker::RectRubberBand );
d_zoomer[0]->setRubberBandPen( QColor( Qt::green ) );
d_zoomer[0]->setTrackerMode( QwtPicker::ActiveOnly );
d_zoomer[0]->setTrackerPen( QColor( Qt::white ) );
d_zoomer[1] = new Zoomer( QwtPlot::xTop, QwtPlot::yRight,
d_plot->canvas() );
d_panner = new QwtPlotPanner( d_plot->canvas() );
d_panner->setMouseButton( Qt::MidButton );
d_picker = new QwtPlotPicker( QwtPlot::xBottom, QwtPlot::yLeft,
QwtPlotPicker::CrossRubberBand, QwtPicker::AlwaysOn,
d_plot->canvas() );
d_picker->setStateMachine( new QwtPickerDragPointMachine() );
d_picker->setRubberBandPen( QColor( Qt::green ) );
d_picker->setRubberBand( QwtPicker::CrossRubberBand );
d_picker->setTrackerPen( QColor( Qt::white ) );
setCentralWidget( d_plot );
QToolBar *toolBar = new QToolBar( this );
QToolButton *btnZoom = new QToolButton( toolBar );
btnZoom->setText( "Zoom" );
btnZoom->setIcon( QPixmap( zoom_xpm ) );
btnZoom->setCheckable( true );
btnZoom->setToolButtonStyle( Qt::ToolButtonTextUnderIcon );
toolBar->addWidget( btnZoom );
connect( btnZoom, SIGNAL( toggled( bool ) ), SLOT( enableZoomMode( bool ) ) );
#ifndef QT_NO_PRINTER
QToolButton *btnPrint = new QToolButton( toolBar );
btnPrint->setText( "Print" );
btnPrint->setIcon( QPixmap( print_xpm ) );
btnPrint->setToolButtonStyle( Qt::ToolButtonTextUnderIcon );
toolBar->addWidget( btnPrint );
connect( btnPrint, SIGNAL( clicked() ), SLOT( print() ) );
#endif
QToolButton *btnExport = new QToolButton( toolBar );
btnExport->setText( "Export" );
btnExport->setIcon( QPixmap( print_xpm ) );
btnExport->setToolButtonStyle( Qt::ToolButtonTextUnderIcon );
toolBar->addWidget( btnExport );
connect( btnExport, SIGNAL( clicked() ), SLOT( exportDocument() ) );
toolBar->addSeparator();
QWidget *hBox = new QWidget( toolBar );
QHBoxLayout *layout = new QHBoxLayout( hBox );
layout->setSpacing( 0 );
layout->addWidget( new QWidget( hBox ), 10 ); // spacer
layout->addWidget( new QLabel( "Damping Factor", hBox ), 0 );
layout->addSpacing( 10 );
QwtCounter *cntDamp = new QwtCounter( hBox );
cntDamp->setRange( 0.0, 5.0 );
cntDamp->setSingleStep( 0.01 );
cntDamp->setValue( 0.0 );
layout->addWidget( cntDamp, 0 );
( void )toolBar->addWidget( hBox );
addToolBar( toolBar );
#ifndef QT_NO_STATUSBAR
( void )statusBar();
#endif
enableZoomMode( false );
showInfo();
connect( cntDamp, SIGNAL( valueChanged( double ) ),
d_plot, SLOT( setDamp( double ) ) );
connect( d_picker, SIGNAL( moved( const QPoint & ) ),
SLOT( moved( const QPoint & ) ) );
connect( d_picker, SIGNAL( selected( const QPolygon & ) ),
SLOT( selected( const QPolygon & ) ) );
}
#ifndef QT_NO_PRINTER
void MainWindow::print()
{
QPrinter printer( QPrinter::HighResolution );
QString docName = d_plot->title().text();
if ( !docName.isEmpty() )
{
docName.replace ( QRegExp ( QString::fromLatin1 ( "\n" ) ), tr ( " -- " ) );
printer.setDocName ( docName );
}
printer.setCreator( "Bode example" );
printer.setOrientation( QPrinter::Landscape );
QPrintDialog dialog( &printer );
if ( dialog.exec() )
{
QwtPlotRenderer renderer;
if ( printer.colorMode() == QPrinter::GrayScale )
{
renderer.setDiscardFlag( QwtPlotRenderer::DiscardBackground );
renderer.setDiscardFlag( QwtPlotRenderer::DiscardCanvasBackground );
renderer.setDiscardFlag( QwtPlotRenderer::DiscardCanvasFrame );
renderer.setLayoutFlag( QwtPlotRenderer::FrameWithScales );
}
renderer.renderTo( d_plot, printer );
}
}
#endif
void MainWindow::exportDocument()
{
QwtPlotRenderer renderer;
renderer.exportTo( d_plot, "bode.pdf" );
}
void MainWindow::enableZoomMode( bool on )
{
d_panner->setEnabled( on );
d_zoomer[0]->setEnabled( on );
d_zoomer[0]->zoom( 0 );
d_zoomer[1]->setEnabled( on );
d_zoomer[1]->zoom( 0 );
d_picker->setEnabled( !on );
showInfo();
}
void MainWindow::showInfo( QString text )
{
if ( text.isEmpty() )
{
if ( d_picker->rubberBand() )
text = "Cursor Pos: Press left mouse button in plot region";
else
text = "Zoom: Press mouse button and drag";
}
#ifndef QT_NO_STATUSBAR
statusBar()->showMessage( text );
#endif
}
void MainWindow::moved( const QPoint &pos )
{
QString info;
info.sprintf( "Freq=%g, Ampl=%g, Phase=%g",
d_plot->invTransform( QwtPlot::xBottom, pos.x() ),
d_plot->invTransform( QwtPlot::yLeft, pos.y() ),
d_plot->invTransform( QwtPlot::yRight, pos.y() )
);
showInfo( info );
}
void MainWindow::selected( const QPolygon & )
{
showInfo();
}
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