Add files from zip

examples/refreshtest/MainWindow.cpp

@@ -0,0 +1,82 @@
+/*****************************************************************************
+ * Qwt Examples - Copyright (C) 2002 Uwe Rathmann
+ * This file may be used under the terms of the 3-clause BSD License
+ *****************************************************************************/
+
+#include "MainWindow.h"
+#include "Plot.h"
+#include "Panel.h"
+
+#include <QStatusBar>
+#include <QLabel>
+#include <QLayout>
+#include <QEvent>
+#include <QElapsedTimer>
+
+MainWindow::MainWindow( QWidget* parent )
+    : QMainWindow( parent )
+{
+    Panel* panel = new Panel();
+    m_plot = new Plot();
+
+    QWidget* w = new QWidget( this );
+
+    QHBoxLayout* hLayout = new QHBoxLayout( w );
+    hLayout->addWidget( panel );
+    hLayout->addWidget( m_plot, 10 );
+
+    setCentralWidget( w );
+
+    m_frameCount = new QLabel( this );
+    statusBar()->addWidget( m_frameCount, 10 );
+
+    applySettings( panel->settings() );
+
+    connect( panel, SIGNAL(settingsChanged(const Settings&)),
+        this, SLOT(applySettings(const Settings&)) );
+}
+
+bool MainWindow::eventFilter( QObject* object, QEvent* event )
+{
+    if ( object == m_plot->canvas() && event->type() == QEvent::Paint )
+    {
+        static int counter;
+        static QElapsedTimer timeStamp;
+
+        if ( !timeStamp.isValid() )
+        {
+            timeStamp.start();
+            counter = 0;
+        }
+        else
+        {
+            counter++;
+
+            const double elapsed = timeStamp.elapsed() / 1000.0;
+            if ( elapsed >= 1 )
+            {
+                QString fps;
+                fps.setNum( qRound( counter / elapsed ) );
+                fps += " Fps";
+
+                m_frameCount->setText( fps );
+
+                counter = 0;
+                timeStamp.start();
+            }
+        }
+    }
+
+    return QMainWindow::eventFilter( object, event );
+}
+
+void MainWindow::applySettings( const Settings& settings )
+{
+    m_plot->setSettings( settings );
+
+    // the canvas might have been recreated
+    m_plot->canvas()->removeEventFilter( this );
+    m_plot->canvas()->installEventFilter( this );
+}
+
+#include "moc_MainWindow.cpp"