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examples/bode/MainWindow.cpp
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239
examples/bode/MainWindow.cpp
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/*****************************************************************************
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* Qwt Examples
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* Copyright (C) 1997 Josef Wilgen
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* Copyright (C) 2002 Uwe Rathmann
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the Qwt License, Version 1.0
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*****************************************************************************/
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#include "MainWindow.h"
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#include "Plot.h"
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#include "Pixmaps.h"
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#include <QwtCounter>
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#include <QwtPickerMachine>
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#include <QwtPlotZoomer>
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#include <QwtPlotPanner>
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#include <QwtPlotRenderer>
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#include <QwtText>
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#include <QToolBar>
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#include <QToolButton>
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#include <QLabel>
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#include <QLayout>
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#include <QStatusBar>
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#include <QPrinter>
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#include <QPrintDialog>
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#include <QPen>
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namespace
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{
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class Zoomer : public QwtPlotZoomer
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{
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public:
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Zoomer( int xAxis, int yAxis, QWidget* canvas )
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: QwtPlotZoomer( xAxis, yAxis, canvas )
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{
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setTrackerMode( QwtPicker::AlwaysOff );
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setRubberBand( QwtPicker::NoRubberBand );
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// RightButton: zoom out by 1
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// Ctrl+RightButton: zoom out to full size
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setMousePattern( QwtEventPattern::MouseSelect2,
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Qt::RightButton, Qt::ControlModifier );
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setMousePattern( QwtEventPattern::MouseSelect3,
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Qt::RightButton );
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}
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};
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}
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MainWindow::MainWindow( QWidget* parent )
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: QMainWindow( parent )
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{
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m_plot = new Plot( this );
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const int margin = 5;
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m_plot->setContentsMargins( margin, margin, margin, 0 );
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setContextMenuPolicy( Qt::NoContextMenu );
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m_zoomer[0] = new Zoomer( QwtAxis::XBottom, QwtAxis::YLeft,
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m_plot->canvas() );
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m_zoomer[0]->setRubberBand( QwtPicker::RectRubberBand );
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m_zoomer[0]->setRubberBandPen( QColor( Qt::green ) );
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m_zoomer[0]->setTrackerMode( QwtPicker::ActiveOnly );
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m_zoomer[0]->setTrackerPen( QColor( Qt::white ) );
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m_zoomer[1] = new Zoomer(
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QwtAxis::XTop, QwtAxis::YRight, m_plot->canvas() );
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m_panner = new QwtPlotPanner( m_plot->canvas() );
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m_panner->setMouseButton( Qt::MiddleButton );
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m_picker = new QwtPlotPicker( QwtAxis::XBottom, QwtAxis::YLeft,
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QwtPlotPicker::CrossRubberBand, QwtPicker::AlwaysOn,
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m_plot->canvas() );
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m_picker->setStateMachine( new QwtPickerDragPointMachine() );
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m_picker->setRubberBandPen( QColor( Qt::green ) );
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m_picker->setRubberBand( QwtPicker::CrossRubberBand );
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m_picker->setTrackerPen( QColor( Qt::white ) );
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setCentralWidget( m_plot );
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QToolBar* toolBar = new QToolBar( this );
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QToolButton* btnZoom = new QToolButton( toolBar );
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btnZoom->setText( "Zoom" );
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btnZoom->setIcon( QPixmap( zoom_xpm ) );
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btnZoom->setCheckable( true );
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btnZoom->setToolButtonStyle( Qt::ToolButtonTextUnderIcon );
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toolBar->addWidget( btnZoom );
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connect( btnZoom, SIGNAL(toggled(bool)), SLOT(enableZoomMode(bool)) );
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#ifndef QT_NO_PRINTER
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QToolButton* btnPrint = new QToolButton( toolBar );
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btnPrint->setText( "Print" );
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btnPrint->setIcon( QPixmap( print_xpm ) );
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btnPrint->setToolButtonStyle( Qt::ToolButtonTextUnderIcon );
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toolBar->addWidget( btnPrint );
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connect( btnPrint, SIGNAL(clicked()), SLOT(print()) );
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#endif
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QToolButton* btnExport = new QToolButton( toolBar );
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btnExport->setText( "Export" );
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btnExport->setIcon( QPixmap( print_xpm ) );
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btnExport->setToolButtonStyle( Qt::ToolButtonTextUnderIcon );
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toolBar->addWidget( btnExport );
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connect( btnExport, SIGNAL(clicked()), SLOT(exportDocument()) );
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toolBar->addSeparator();
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QWidget* hBox = new QWidget( toolBar );
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QHBoxLayout* layout = new QHBoxLayout( hBox );
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layout->setSpacing( 0 );
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layout->addWidget( new QWidget( hBox ), 10 ); // spacer
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layout->addWidget( new QLabel( "Damping Factor", hBox ), 0 );
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layout->addSpacing( 10 );
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QwtCounter* cntDamp = new QwtCounter( hBox );
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cntDamp->setRange( 0.0, 5.0 );
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cntDamp->setSingleStep( 0.01 );
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cntDamp->setValue( 0.0 );
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layout->addWidget( cntDamp, 0 );
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( void )toolBar->addWidget( hBox );
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addToolBar( toolBar );
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#ifndef QT_NO_STATUSBAR
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( void )statusBar();
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#endif
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enableZoomMode( false );
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showInfo();
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connect( cntDamp, SIGNAL(valueChanged(double)),
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m_plot, SLOT(setDamp(double)) );
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connect( m_picker, SIGNAL(moved(const QPoint&)),
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SLOT(moved(const QPoint&)) );
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connect( m_picker, SIGNAL(selected(const QPolygon&)),
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SLOT(selected(const QPolygon&)) );
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}
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#ifndef QT_NO_PRINTER
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void MainWindow::print()
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{
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QPrinter printer( QPrinter::HighResolution );
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QString docName = m_plot->title().text();
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if ( !docName.isEmpty() )
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{
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docName.replace ( "\n", " -- " );
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printer.setDocName ( docName );
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}
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printer.setCreator( "Bode example" );
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#if QT_VERSION >= 0x050300
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printer.setPageOrientation( QPageLayout::Landscape );
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#else
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printer.setOrientation( QPrinter::Landscape );
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#endif
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QPrintDialog dialog( &printer );
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if ( dialog.exec() )
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{
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QwtPlotRenderer renderer;
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if ( printer.colorMode() == QPrinter::GrayScale )
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{
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renderer.setDiscardFlag( QwtPlotRenderer::DiscardBackground );
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renderer.setDiscardFlag( QwtPlotRenderer::DiscardCanvasBackground );
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renderer.setDiscardFlag( QwtPlotRenderer::DiscardCanvasFrame );
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renderer.setLayoutFlag( QwtPlotRenderer::FrameWithScales );
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}
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renderer.renderTo( m_plot, printer );
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}
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}
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#endif
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void MainWindow::exportDocument()
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{
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QwtPlotRenderer renderer;
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renderer.exportTo( m_plot, "bode.pdf" );
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}
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void MainWindow::enableZoomMode( bool on )
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{
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m_panner->setEnabled( on );
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m_zoomer[0]->setEnabled( on );
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m_zoomer[0]->zoom( 0 );
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m_zoomer[1]->setEnabled( on );
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m_zoomer[1]->zoom( 0 );
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m_picker->setEnabled( !on );
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showInfo();
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}
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void MainWindow::showInfo( QString text )
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{
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if ( text.isEmpty() )
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{
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if ( m_picker->rubberBand() )
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text = "Cursor Pos: Press left mouse button in plot region";
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else
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text = "Zoom: Press mouse button and drag";
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}
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#ifndef QT_NO_STATUSBAR
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statusBar()->showMessage( text );
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#endif
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}
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void MainWindow::moved( const QPoint& pos )
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{
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using namespace QwtAxis;
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QString info( "Freq=%1, Ampl=%2, Phase=%3" );
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info = info.arg( m_plot->invTransform( XBottom, pos.x() ) );
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info = info.arg( m_plot->invTransform( YLeft, pos.y() ) );
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info = info.arg( m_plot->invTransform( YRight, pos.y() ) );
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showInfo( info );
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}
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void MainWindow::selected( const QPolygon& )
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{
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showInfo();
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}
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#include "moc_MainWindow.cpp"
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