Qwt और Qt निर्माता। भाग 3: एक डिज़ाइनर तत्व तत्व के रूप में एक ग्राफ

 #ifndef MAINWINDOW_H #define MAINWINDOW_H #include <QMainWindow> #include <qwt_plot.h> #include <qwt_plot_grid.h> #include <qwt_legend.h> #include <qwt_plot_curve.h> #include <qwt_symbol.h> #include <qwt_plot_magnifier.h> #include <qwt_plot_panner.h> #include <qwt_plot_picker.h> #include <qwt_picker_machine.h> namespace Ui { class MainWindow; } class MainWindow : public QMainWindow { Q_OBJECT public: explicit MainWindow(QWidget *parent = 0); ~MainWindow(); private Q_SLOTS: void click_on_canvas( const QPoint &pos ); private: Ui::MainWindow *ui; void addPlot(); void addPlotGrid(); QwtPlotCurve *curve; QPolygonF points; void addCurve(); void enableMagnifier(); void enableMovingOnPlot(); void enablePicker(); }; #endif // MAINWINDOW_H 

 #include "mainwindow.h" #include "ui_mainwindow.h" MainWindow::MainWindow(QWidget *parent) : QMainWindow(parent), ui(new Ui::MainWindow) { ui->setupUi(this); //        addPlot(); //    addPlotGrid(); //  addCurve(); //   /  enableMagnifier(); //      enableMovingOnPlot(); //        //      enablePicker(); } MainWindow::~MainWindow() { delete ui; } void MainWindow::addPlot() { // #include <qwt_plot.h> ui->Qwt_Widget->setTitle( "Qwt demonstration" ); ui->Qwt_Widget->setCanvasBackground( Qt::white ); //    ui->Qwt_Widget->setAxisTitle(QwtPlot::yLeft, "Y"); ui->Qwt_Widget->setAxisTitle(QwtPlot::xBottom, "X"); ui->Qwt_Widget->insertLegend( new QwtLegend() ); } void MainWindow::addPlotGrid() { // #include <qwt_plot_grid.h> QwtPlotGrid *grid = new QwtPlotGrid(); grid->setMajorPen(QPen( Qt::gray, 2 )); //     grid->attach( ui->Qwt_Widget ); } void MainWindow::addCurve() { //#include <qwt_plot_curve.h> curve = new QwtPlotCurve(); curve->setTitle( "Demo Curve" ); curve->setPen( Qt::blue, 6 ); //     //   // #include <qwt_symbol.h> QwtSymbol *symbol = new QwtSymbol( QwtSymbol::Ellipse, QBrush( Qt::yellow ), QPen( Qt::red, 2 ), QSize( 8, 8 ) ); curve->setSymbol( symbol ); //       //     ,   //    for (int i = 0; i < 5; i++) { points << QPointF( 1.0 * i, 1.0 * i); //   } curve->setSamples( points ); //      curve->attach( ui->Qwt_Widget ); //     } void MainWindow::enableMagnifier() { // #include <qwt_plot_magnifier.h> QwtPlotMagnifier *magnifier = new QwtPlotMagnifier(ui->Qwt_Widget->canvas()); // ,  / magnifier->setMouseButton(Qt::MidButton); } void MainWindow::enableMovingOnPlot() { // #include <qwt_plot_panner.h> QwtPlotPanner *d_panner = new QwtPlotPanner( ui->Qwt_Widget->canvas() ); // ,   d_panner->setMouseButton( Qt::RightButton ); } void MainWindow::enablePicker() { // #include <qwt_plot_picker.h> //   QwtPlotPicker *d_picker = new QwtPlotPicker( QwtPlot::xBottom, QwtPlot::yLeft, //    QwtPlotPicker::CrossRubberBand, //    QwtPicker::AlwaysOn, //   ui->Qwt_Widget->canvas() ); //    //    d_picker->setRubberBandPen( QColor( Qt::red ) ); //     d_picker->setTrackerPen( QColor( Qt::black ) ); //     d_picker->setStateMachine( new QwtPickerDragPointMachine() ); }