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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"

playground/timescale/MainWindow.h

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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
+ *****************************************************************************/
+
+#pragma once
+
+#include <QMainWindow>
+
+class Plot;
+class Panel;
+
+class MainWindow : public QMainWindow
+{
+    Q_OBJECT
+
+  public:
+    MainWindow( QWidget* parent = 0 );
+
+  private Q_SLOTS:
+    void updatePlot();
+    void updatePanel();
+
+  private:
+    Plot* m_plot;
+    Panel* m_panel;
+};

playground/timescale/Panel.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 "Panel.h"
+#include "Settings.h"
+
+#include <QDateTimeEdit>
+#include <QSpinBox>
+#include <QLayout>
+#include <QLabel>
+
+Panel::Panel( QWidget* parent )
+    : QWidget( parent )
+{
+    // create widgets
+
+    m_startDateTime = new QDateTimeEdit();
+    m_startDateTime->setDisplayFormat( "M/d/yyyy h:mm AP :zzz" );
+    m_startDateTime->setCalendarPopup( true );
+
+    m_endDateTime = new QDateTimeEdit();
+    m_endDateTime->setDisplayFormat( "M/d/yyyy h:mm AP :zzz" );
+    m_endDateTime->setCalendarPopup( true );
+
+    m_maxMajorSteps = new QSpinBox();
+    m_maxMajorSteps->setRange( 0, 50 );
+
+    m_maxMinorSteps = new QSpinBox();
+    m_maxMinorSteps->setRange( 0, 50 );
+
+    m_maxWeeks = new QSpinBox();
+    m_maxWeeks->setRange( -1, 100 );
+    m_maxWeeks->setSpecialValueText( "Disabled" );
+
+    // layout
+
+    QGridLayout* layout = new QGridLayout( this );
+    layout->setAlignment( Qt::AlignLeft | Qt::AlignTop );
+
+    int row = 0;
+    layout->addWidget( new QLabel( "From" ), row, 0 );
+    layout->addWidget( m_startDateTime, row, 1 );
+
+    row++;
+    layout->addWidget( new QLabel( "To" ), row, 0 );
+    layout->addWidget( m_endDateTime, row, 1 );
+
+    row++;
+    layout->addWidget( new QLabel( "Max. Major Steps" ), row, 0 );
+    layout->addWidget( m_maxMajorSteps, row, 1 );
+
+    row++;
+    layout->addWidget( new QLabel( "Max. Minor Steps" ), row, 0 );
+    layout->addWidget( m_maxMinorSteps, row, 1 );
+
+    row++;
+    layout->addWidget( new QLabel( "Max Weeks" ), row, 0 );
+    layout->addWidget( m_maxWeeks, row, 1 );
+
+    connect( m_startDateTime,
+        SIGNAL(dateTimeChanged(const QDateTime&)), SIGNAL(edited()) );
+    connect( m_endDateTime,
+        SIGNAL(dateTimeChanged(const QDateTime&)), SIGNAL(edited()) );
+    connect( m_maxMajorSteps,
+        SIGNAL(valueChanged(int)), SIGNAL(edited()) );
+    connect( m_maxMinorSteps,
+        SIGNAL(valueChanged(int)), SIGNAL(edited()) );
+    connect( m_maxWeeks,
+        SIGNAL(valueChanged(int)), SIGNAL(edited()) );
+}
+
+void Panel::setSettings( const Settings& settings )
+{
+    blockSignals( true );
+
+    m_startDateTime->setDateTime( settings.startDateTime );
+    m_endDateTime->setDateTime( settings.endDateTime );
+
+    m_maxMajorSteps->setValue( settings.maxMajorSteps );
+    m_maxMinorSteps->setValue( settings.maxMinorSteps );
+    m_maxWeeks->setValue( settings.maxWeeks );
+
+    blockSignals( false );
+}
+
+Settings Panel::settings() const
+{
+    Settings settings;
+
+    settings.startDateTime = m_startDateTime->dateTime();
+    settings.endDateTime = m_endDateTime->dateTime();
+
+    settings.maxMajorSteps = m_maxMajorSteps->value();
+    settings.maxMinorSteps = m_maxMinorSteps->value();
+    settings.maxWeeks = m_maxWeeks->value();
+
+    return settings;
+}
+
+#include "moc_Panel.cpp"

playground/timescale/Panel.h

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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
+ *****************************************************************************/
+
+#pragma once
+
+#include "Settings.h"
+#include <QWidget>
+
+class QDateTimeEdit;
+class QSpinBox;
+
+class Panel : public QWidget
+{
+    Q_OBJECT
+
+  public:
+    Panel( QWidget* parent = NULL );
+
+    void setSettings( const Settings&);
+    Settings settings() const;
+
+  Q_SIGNALS:
+    void edited();
+
+  private:
+    QDateTimeEdit* m_startDateTime;
+    QDateTimeEdit* m_endDateTime;
+
+    QSpinBox* m_maxMajorSteps;
+    QSpinBox* m_maxMinorSteps;
+    QSpinBox* m_maxWeeks;
+};

playground/timescale/Plot.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 "Plot.h"
+#include "Settings.h"
+
+#include <QwtDate>
+#include <QwtDateScaleDraw>
+#include <QwtDateScaleEngine>
+#include <QwtPlotPanner>
+#include <QwtPlotMagnifier>
+#include <QwtPlotGrid>
+#include <QwtPlotLayout>
+
+Plot::Plot( QWidget* parent )
+    : QwtPlot( parent )
+{
+    setAutoFillBackground( true );
+    setPalette( Qt::darkGray );
+    setCanvasBackground( Qt::white );
+
+    plotLayout()->setAlignCanvasToScales( true );
+
+    initAxis( QwtAxis::YLeft, "Local Time", Qt::LocalTime );
+    initAxis( QwtAxis::YRight,
+        "Coordinated Universal Time ( UTC )", Qt::UTC );
+
+    QwtPlotPanner* panner = new QwtPlotPanner( canvas() );
+    QwtPlotMagnifier* magnifier = new QwtPlotMagnifier( canvas() );
+
+    for ( int axis = 0; axis < QwtAxis::AxisPositions; axis++ )
+    {
+        const bool on = QwtAxis::isYAxis( axis );
+
+        setAxisVisible( axis, on );
+        panner->setAxisEnabled( axis, on );
+        magnifier->setAxisEnabled( axis, on );
+    }
+
+    QwtPlotGrid* grid = new QwtPlotGrid();
+    grid->setMajorPen( Qt::black, 0, Qt::SolidLine );
+    grid->setMinorPen( Qt::gray, 0, Qt::SolidLine );
+    grid->enableX( false );
+    grid->enableXMin( false );
+    grid->enableY( true );
+    grid->enableYMin( true );
+
+    grid->attach( this );
+}
+
+void Plot::initAxis( int axis,
+    const QString& title, Qt::TimeSpec timeSpec )
+{
+    setAxisTitle( axis, title );
+
+    QwtDateScaleDraw* scaleDraw = new QwtDateScaleDraw( timeSpec );
+    QwtDateScaleEngine* scaleEngine = new QwtDateScaleEngine( timeSpec );
+
+#if 0
+    if ( timeSpec == Qt::LocalTime )
+    {
+        scaleDraw->setTimeSpec( Qt::OffsetFromUTC );
+        scaleDraw->setUtcOffset( 10 );
+
+        scaleEngine->setTimeSpec( Qt::OffsetFromUTC );
+        scaleEngine->setUtcOffset( 10 );
+    }
+#endif
+    setAxisScaleDraw( axis, scaleDraw );
+    setAxisScaleEngine( axis, scaleEngine );
+}
+
+void Plot::applySettings( const Settings& settings )
+{
+    applyAxisSettings( QwtAxis::YLeft, settings );
+    applyAxisSettings( QwtAxis::YRight, settings );
+
+    replot();
+}
+
+void Plot::applyAxisSettings( int axis, const Settings& settings )
+{
+    QwtDateScaleEngine* scaleEngine =
+        static_cast< QwtDateScaleEngine* >( axisScaleEngine( axis ) );
+
+    scaleEngine->setMaxWeeks( settings.maxWeeks );
+    setAxisMaxMinor( axis, settings.maxMinorSteps );
+    setAxisMaxMajor( axis, settings.maxMajorSteps );
+
+
+    setAxisScale( axis, QwtDate::toDouble( settings.startDateTime ),
+        QwtDate::toDouble( settings.endDateTime ) );
+}
+
+#include "moc_Plot.cpp"

playground/timescale/Plot.h

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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
+ *****************************************************************************/
+
+#pragma once
+
+#include <QwtPlot>
+
+class Settings;
+
+class Plot : public QwtPlot
+{
+    Q_OBJECT
+
+  public:
+    Plot( QWidget* parent = NULL );
+
+  public Q_SLOTS:
+    void applySettings( const Settings& );
+
+  private:
+    void initAxis( int axis, const QString& title, Qt::TimeSpec );
+    void applyAxisSettings( int axis, const Settings& );
+};

playground/timescale/Settings.h

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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
+ *****************************************************************************/
+
+#pragma once
+
+#include <QDateTime>
+
+class Settings
+{
+  public:
+    Settings()
+        : maxMajorSteps( 10 )
+        , maxMinorSteps( 5 )
+        , maxWeeks( -1 )
+    {
+    };
+
+    QDateTime startDateTime;
+    QDateTime endDateTime;
+
+    int maxMajorSteps;
+    int maxMinorSteps;
+
+    int maxWeeks;
+};

playground/timescale/main.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 <QApplication>
+
+int main( int argc, char* argv[] )
+{
+    QApplication app( argc, argv );
+
+    MainWindow window;
+    window.resize( 800, 600 );
+    window.show();
+
+    return app.exec();
+}

playground/timescale/timescale.pro

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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( $${PWD}/../playground.pri )
+
+TARGET       = timescale
+
+HEADERS = \
+    Panel.h \
+    Plot.h \
+    MainWindow.h
+
+SOURCES = \
+    Panel.cpp \
+    Plot.cpp \
+    MainWindow.cpp \
+    main.cpp
+