彻底改版2.0

third/qwtdemo/examples/legends/mainwindow.cpp

@@ -0,0 +1,61 @@
+#include <qtoolbar.h>
+#include <qtoolbutton.h>
+#include <qlayout.h>
+#include <qwt_plot_renderer.h>
+#include <qwt_plot_canvas.h>
+#include "plot.h"
+#include "panel.h"
+#include "mainwindow.h"
+
+MainWindow::MainWindow( QWidget *parent ):
+    QMainWindow( parent )
+{
+    d_plot = new Plot();
+
+    Settings settings;
+    settings.legend.isEnabled = true;
+    settings.legend.position = QwtPlot::BottomLegend;
+
+    settings.legendItem.isEnabled = false;
+    settings.legendItem.numColumns = 1;
+    settings.legendItem.alignment = Qt::AlignRight | Qt::AlignVCenter;
+    settings.legendItem.backgroundMode = 0;
+    settings.legendItem.size = d_plot->canvas()->font().pointSize();
+
+    settings.curve.numCurves = 4;
+    settings.curve.title = "Curve";
+    
+    d_panel = new Panel();
+    d_panel->setSettings( settings );
+
+    QWidget *box = new QWidget( this );
+    QHBoxLayout *layout = new QHBoxLayout( box );
+    layout->addWidget( d_plot, 10 );
+    layout->addWidget( d_panel );
+
+    setCentralWidget( box );
+
+    QToolBar *toolBar = new QToolBar( this );
+
+    QToolButton *btnExport = new QToolButton( toolBar );
+    btnExport->setText( "Export" );
+    toolBar->addWidget( btnExport );
+
+    addToolBar( toolBar );
+
+    updatePlot();
+
+    connect( d_panel, SIGNAL( edited() ), SLOT( updatePlot() ) );
+    connect( btnExport, SIGNAL( clicked() ), SLOT( exportPlot() ) );
+}
+
+void MainWindow::updatePlot()
+{
+    d_plot->applySettings( d_panel->settings() );
+}
+
+void MainWindow::exportPlot()
+{
+    QwtPlotRenderer renderer;
+    renderer.exportTo( d_plot, "legends.pdf" );
+}