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playground/timescale/MainWindow.cpp

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+/*****************************************************************************
+ * 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 <QwtDate>
+#include <QwtScaleWidget>
+
+#include <QLayout>
+
+MainWindow::MainWindow( QWidget* parent )
+    : QMainWindow( parent )
+{
+    Settings settings;
+#if 1
+    settings.startDateTime = QDateTime( QDate( 2012, 10, 27 ), QTime( 18, 5, 0, 0 ) );
+    settings.endDateTime = QDateTime( QDate( 2012, 10, 28 ), QTime( 12, 12, 0, 0 ) );
+#else
+    settings.startDateTime = QDateTime( QDate( 2011, 5, 3 ), QTime( 0, 6, 0, 0 ) );
+    settings.endDateTime = QDateTime( QDate( 2012, 3, 10 ), QTime( 0, 5, 0, 0 ) );
+#endif
+    settings.maxMajorSteps = 10;
+    settings.maxMinorSteps = 8;
+    settings.maxWeeks = -1;
+
+    m_plot = new Plot();
+    m_panel = new Panel();
+    m_panel->setSettings( settings );
+
+    QWidget* box = new QWidget( this );
+
+    QHBoxLayout* layout = new QHBoxLayout( box );
+    layout->addWidget( m_plot, 10 );
+    layout->addWidget( m_panel );
+
+    setCentralWidget( box );
+
+    updatePlot();
+
+    connect( m_panel, SIGNAL(edited()), SLOT(updatePlot()) );
+    connect( m_plot->axisWidget( QwtAxis::YLeft ),
+        SIGNAL(scaleDivChanged()), SLOT(updatePanel()) );
+}
+
+void MainWindow::updatePlot()
+{
+    m_plot->blockSignals( true );
+    m_plot->applySettings( m_panel->settings() );
+    m_plot->blockSignals( false );
+}
+
+void MainWindow::updatePanel()
+{
+    const QwtScaleDiv scaleDiv = m_plot->axisScaleDiv( QwtAxis::YLeft );
+
+    Settings settings = m_panel->settings();
+    settings.startDateTime = QwtDate::toDateTime( scaleDiv.lowerBound(), Qt::LocalTime );
+    settings.endDateTime = QwtDate::toDateTime( scaleDiv.upperBound(), Qt::LocalTime );
+
+    m_panel->setSettings( settings );
+}
+
+#include "moc_MainWindow.cpp"