From bd0f3345a938b35ce6a12f6150373b0955b8dd12 Mon Sep 17 00:00:00 2001 From: Timothy Pearson Date: Sun, 10 Jul 2011 15:24:15 -0500 Subject: Add Qt3 development HEAD version --- doc/html/canvas-chart-example.html | 814 +++++++++++++++++++++++++++++++++++++ 1 file changed, 814 insertions(+) create mode 100644 doc/html/canvas-chart-example.html (limited to 'doc/html/canvas-chart-example.html') diff --git a/doc/html/canvas-chart-example.html b/doc/html/canvas-chart-example.html new file mode 100644 index 0000000..bc91349 --- /dev/null +++ b/doc/html/canvas-chart-example.html @@ -0,0 +1,814 @@ + + + + + +A Complete Canvas Application + + + + + + + +

A Complete Canvas Application

+ + + +

This is a complete example program with a main window, menus and +toolbars. The main widget is a QCanvas, and this example +demonstrates basic canvas usage. + +

Project file: +

TEMPLATE = app
+
+CONFIG  += warn_on
+
+REQUIRES = full-config
+
+HEADERS += element.h \
+           canvastext.h \
+           canvasview.h \
+           chartform.h \
+           optionsform.h \
+           setdataform.h
+SOURCES += element.cpp \
+           canvasview.cpp \
+           chartform.cpp \
+           chartform_canvas.cpp \
+           chartform_files.cpp \
+           optionsform.cpp \
+           setdataform.cpp \
+           main.cpp
+

+ +

Header files: +

#ifndef ELEMENT_H
+#define ELEMENT_H
+
+#include <qcolor.h>
+#include <qnamespace.h>
+#include <qstring.h>
+#include <qvaluevector.h>
+
+class Element;
+
+typedef QValueVector<Element> ElementVector;
+
+/*
+    Elements are valid if they have a value which is > EPSILON.
+*/
+const double EPSILON = 0.0000001; // Must be > INVALID.
+
+
+class Element
+{
+public:
+    enum { INVALID = -1 };
+    enum { NO_PROPORTION = -1 };
+    enum { MAX_PROPOINTS = 3 }; // One proportional point per chart type
+
+    Element( double value = INVALID, QColor valueColor = Qt::gray,
+             int valuePattern = Qt::SolidPattern,
+             const QString& label = QString::null,
+             QColor labelColor = Qt::black ) {
+        init( value, valueColor, valuePattern, label, labelColor );
+        for ( int i = 0; i < MAX_PROPOINTS * 2; ++i )
+            m_propoints[i] = NO_PROPORTION;
+    }
+    ~Element() {}
+
+    bool isValid() const { return m_value > EPSILON; }
+
+    double value() const { return m_value; }
+    QColor valueColor() const { return m_valueColor; }
+    int valuePattern() const { return m_valuePattern; }
+    QString label() const { return m_label; }
+    QColor labelColor() const { return m_labelColor; }
+    double proX( int index ) const;
+    double proY( int index ) const;
+
+    void set( double value = INVALID, QColor valueColor = Qt::gray,
+              int valuePattern = Qt::SolidPattern,
+              const QString& label = QString::null,
+              QColor labelColor = Qt::black ) {
+        init( value, valueColor, valuePattern, label, labelColor );
+    }
+    void setValue( double value ) { m_value = value; }
+    void setValueColor( QColor valueColor ) { m_valueColor = valueColor; }
+    void setValuePattern( int valuePattern );
+    void setLabel( const QString& label ) { m_label = label; }
+    void setLabelColor( QColor labelColor ) { m_labelColor = labelColor; }
+    void setProX( int index, double value );
+    void setProY( int index, double value );
+
+#ifdef Q_FULL_TEMPLATE_INSTANTIATION
+    // xlC 3.x workaround
+    Q_DUMMY_COMPARISON_OPERATOR(Element)
+    bool operator!=( const Element& e) const {
+        return ( !(e == *this) );
+    }
+#endif
+
+private:
+    void init( double value, QColor valueColor, int valuePattern,
+               const QString& label, QColor labelColor );
+
+    double m_value;
+    QColor m_valueColor;
+    int m_valuePattern;
+    QString m_label;
+    QColor m_labelColor;
+    double m_propoints[2 * MAX_PROPOINTS];
+};
+
+
+QTextStream &operator<<( QTextStream&, const Element& );
+QTextStream &operator>>( QTextStream&, Element& );
+
+#endif
+

+ +

#ifndef CHARTFORM_H
+#define CHARTFORM_H
+
+#include "element.h"
+
+#include <qmainwindow.h>
+#include <qstringlist.h>
+
+
+class CanvasView;
+
+class QAction;
+class QCanvas;
+class QFont;
+class QPrinter;
+class QString;
+
+
+class ChartForm: public QMainWindow
+{
+    Q_OBJECT
+public:
+    enum { MAX_ELEMENTS = 100 };
+    enum { MAX_RECENTFILES = 9 }; // Must not exceed 9
+    enum ChartType { PIE, VERTICAL_BAR, HORIZONTAL_BAR };
+    enum AddValuesType { NO, YES, AS_PERCENTAGE };
+
+    ChartForm( const QString& filename );
+    ~ChartForm();
+
+    int chartType() { return m_chartType; }
+    void setChanged( bool changed = TRUE ) { m_changed = changed; }
+    void drawElements();
+
+    QPopupMenu *optionsMenu; // Why public? See canvasview.cpp
+
+protected:
+    virtual void closeEvent( QCloseEvent * );
+
+private slots:
+    void fileNew();
+    void fileOpen();
+    void fileOpenRecent( int index );
+    void fileSave();
+    void fileSaveAs();
+    void fileSaveAsPixmap();
+    void filePrint();
+    void fileQuit();
+    void optionsSetData();
+    void updateChartType( QAction *action );
+    void optionsSetFont();
+    void optionsSetOptions();
+    void helpHelp();
+    void helpAbout();
+    void helpAboutQt();
+    void saveOptions();
+
+private:
+    void init();
+    void load( const QString& filename );
+    bool okToClear();
+    void drawPieChart( const double scales[], double total, int count );
+    void drawVerticalBarChart( const double scales[], double total, int count );
+    void drawHorizontalBarChart( const double scales[], double total, int count );
+
+    QString valueLabel( const QString& label, double value, double total );
+    void updateRecentFiles( const QString& filename );
+    void updateRecentFilesMenu();
+    void setChartType( ChartType chartType );
+
+    QPopupMenu *fileMenu;
+    QAction *optionsPieChartAction;
+    QAction *optionsHorizontalBarChartAction;
+    QAction *optionsVerticalBarChartAction;
+
+
+    QString m_filename;
+    QStringList m_recentFiles;
+    QCanvas *m_canvas;
+    CanvasView *m_canvasView;
+    bool m_changed;
+    ElementVector m_elements;
+    QPrinter *m_printer;
+    ChartType m_chartType;
+    AddValuesType m_addValues;
+    int m_decimalPlaces;
+    QFont m_font;
+};
+
+#endif
+

+ +

Implementation: +

#include "canvasview.h"
+#include "chartform.h"
+#include "optionsform.h"
+#include "setdataform.h"
+
+#include <qaction.h>
+#include <qapplication.h>
+#include <qcombobox.h>
+#include <qfile.h>
+#include <qfiledialog.h>
+#include <qfont.h>
+#include <qfontdialog.h>
+#include <qmenubar.h>
+#include <qmessagebox.h>
+#include <qpixmap.h>
+#include <qpopupmenu.h>
+#include <qprinter.h>
+#include <qradiobutton.h>
+#include <qsettings.h>
+#include <qspinbox.h>
+#include <qstatusbar.h>
+#include <qtoolbar.h>
+#include <qtoolbutton.h>
+
+#include "images/file_new.xpm"
+#include "images/file_open.xpm"
+#include "images/file_save.xpm"
+#include "images/file_print.xpm"
+#include "images/options_setdata.xpm"
+#include "images/options_setfont.xpm"
+#include "images/options_setoptions.xpm"
+#include "images/options_horizontalbarchart.xpm"
+#include "images/options_piechart.xpm"
+#include "images/options_verticalbarchart.xpm"
+
+
+const QString WINDOWS_REGISTRY = "/Trolltech/QtExamples";
+const QString APP_KEY = "/Chart/";
+
+
+ChartForm::ChartForm( const QString& filename )
+    : QMainWindow( 0, 0, WDestructiveClose )
+{
+    setIcon( QPixmap( options_piechart ) );
+
+    QAction *fileNewAction;
+    QAction *fileOpenAction;
+    QAction *fileSaveAction;
+    QAction *fileSaveAsAction;
+    QAction *fileSaveAsPixmapAction;
+    QAction *filePrintAction;
+    QAction *fileQuitAction;
+    QAction *optionsSetDataAction;
+    QAction *optionsSetFontAction;
+    QAction *optionsSetOptionsAction;
+
+    fileNewAction = new QAction(
+            "New Chart", QPixmap( file_new ),
+            "&New", CTRL+Key_N, this, "new" );
+    connect( fileNewAction, SIGNAL( activated() ), this, SLOT( fileNew() ) );
+
+    fileOpenAction = new QAction(
+            "Open Chart", QPixmap( file_open ),
+            "&Open...", CTRL+Key_O, this, "open" );
+    connect( fileOpenAction, SIGNAL( activated() ), this, SLOT( fileOpen() ) );
+
+    fileSaveAction = new QAction(
+            "Save Chart", QPixmap( file_save ),
+            "&Save", CTRL+Key_S, this, "save" );
+    connect( fileSaveAction, SIGNAL( activated() ), this, SLOT( fileSave() ) );
+
+    fileSaveAsAction = new QAction(
+            "Save Chart As", QPixmap( file_save ),
+            "Save &As...", 0, this, "save as" );
+    connect( fileSaveAsAction, SIGNAL( activated() ),
+             this, SLOT( fileSaveAs() ) );
+
+    fileSaveAsPixmapAction = new QAction(
+            "Save Chart As Bitmap", QPixmap( file_save ),
+            "Save As &Bitmap...", CTRL+Key_B, this, "save as bitmap" );
+    connect( fileSaveAsPixmapAction, SIGNAL( activated() ),
+             this, SLOT( fileSaveAsPixmap() ) );
+
+    filePrintAction = new QAction(
+            "Print Chart", QPixmap( file_print ),
+            "&Print Chart...", CTRL+Key_P, this, "print chart" );
+    connect( filePrintAction, SIGNAL( activated() ),
+             this, SLOT( filePrint() ) );
+
+    optionsSetDataAction = new QAction(
+            "Set Data", QPixmap( options_setdata ),
+            "Set &Data...", CTRL+Key_D, this, "set data" );
+    connect( optionsSetDataAction, SIGNAL( activated() ),
+             this, SLOT( optionsSetData() ) );
+
+
+    QActionGroup *chartGroup = new QActionGroup( this ); // Connected later
+    chartGroup->setExclusive( TRUE );
+
+    optionsPieChartAction = new QAction(
+            "Pie Chart", QPixmap( options_piechart ),
+            "&Pie Chart", CTRL+Key_I, chartGroup, "pie chart" );
+    optionsPieChartAction->setToggleAction( TRUE );
+
+    optionsHorizontalBarChartAction = new QAction(
+            "Horizontal Bar Chart", QPixmap( options_horizontalbarchart ),
+            "&Horizontal Bar Chart", CTRL+Key_H, chartGroup,
+            "horizontal bar chart" );
+    optionsHorizontalBarChartAction->setToggleAction( TRUE );
+
+    optionsVerticalBarChartAction = new QAction(
+            "Vertical Bar Chart", QPixmap( options_verticalbarchart ),
+            "&Vertical Bar Chart", CTRL+Key_V, chartGroup, "Vertical bar chart" );
+    optionsVerticalBarChartAction->setToggleAction( TRUE );
+
+
+    optionsSetFontAction = new QAction(
+            "Set Font", QPixmap( options_setfont ),
+            "Set &Font...", CTRL+Key_F, this, "set font" );
+    connect( optionsSetFontAction, SIGNAL( activated() ),
+             this, SLOT( optionsSetFont() ) );
+
+    optionsSetOptionsAction = new QAction(
+            "Set Options", QPixmap( options_setoptions ),
+            "Set &Options...", 0, this, "set options" );
+    connect( optionsSetOptionsAction, SIGNAL( activated() ),
+             this, SLOT( optionsSetOptions() ) );
+
+    fileQuitAction = new QAction( "Quit", "&Quit", CTRL+Key_Q, this, "quit" );
+    connect( fileQuitAction, SIGNAL( activated() ), this, SLOT( fileQuit() ) );
+
+
+    QToolBar* fileTools = new QToolBar( this, "file operations" );
+    fileTools->setLabel( "File Operations" );
+    fileNewAction->addTo( fileTools );
+    fileOpenAction->addTo( fileTools );
+    fileSaveAction->addTo( fileTools );
+    fileTools->addSeparator();
+    filePrintAction->addTo( fileTools );
+
+    QToolBar *optionsTools = new QToolBar( this, "options operations" );
+    optionsTools->setLabel( "Options Operations" );
+    optionsSetDataAction->addTo( optionsTools );
+    optionsTools->addSeparator();
+    optionsPieChartAction->addTo( optionsTools );
+    optionsHorizontalBarChartAction->addTo( optionsTools );
+    optionsVerticalBarChartAction->addTo( optionsTools );
+    optionsTools->addSeparator();
+    optionsSetFontAction->addTo( optionsTools );
+    optionsTools->addSeparator();
+    optionsSetOptionsAction->addTo( optionsTools );
+
+    fileMenu = new QPopupMenu( this );
+    menuBar()->insertItem( "&File", fileMenu );
+    fileNewAction->addTo( fileMenu );
+    fileOpenAction->addTo( fileMenu );
+    fileSaveAction->addTo( fileMenu );
+    fileSaveAsAction->addTo( fileMenu );
+    fileMenu->insertSeparator();
+    fileSaveAsPixmapAction->addTo( fileMenu );
+    fileMenu->insertSeparator();
+    filePrintAction->addTo( fileMenu );
+    fileMenu->insertSeparator();
+    fileQuitAction->addTo( fileMenu );
+
+    optionsMenu = new QPopupMenu( this );
+    menuBar()->insertItem( "&Options", optionsMenu );
+    optionsSetDataAction->addTo( optionsMenu );
+    optionsMenu->insertSeparator();
+    optionsPieChartAction->addTo( optionsMenu );
+    optionsHorizontalBarChartAction->addTo( optionsMenu );
+    optionsVerticalBarChartAction->addTo( optionsMenu );
+    optionsMenu->insertSeparator();
+    optionsSetFontAction->addTo( optionsMenu );
+    optionsMenu->insertSeparator();
+    optionsSetOptionsAction->addTo( optionsMenu );
+
+    menuBar()->insertSeparator();
+
+    QPopupMenu *helpMenu = new QPopupMenu( this );
+    menuBar()->insertItem( "&Help", helpMenu );
+    helpMenu->insertItem( "&Help", this, SLOT(helpHelp()), Key_F1 );
+    helpMenu->insertItem( "&About", this, SLOT(helpAbout()) );
+    helpMenu->insertItem( "About &Qt", this, SLOT(helpAboutQt()) );
+
+
+    m_printer = 0;
+    m_elements.resize( MAX_ELEMENTS );
+
+    QSettings settings;
+    settings.insertSearchPath( QSettings::Windows, WINDOWS_REGISTRY );
+    int windowWidth = settings.readNumEntry( APP_KEY + "WindowWidth", 460 );
+    int windowHeight = settings.readNumEntry( APP_KEY + "WindowHeight", 530 );
+    int windowX = settings.readNumEntry( APP_KEY + "WindowX", -1 );
+    int windowY = settings.readNumEntry( APP_KEY + "WindowY", -1 );
+    setChartType( ChartType(
+            settings.readNumEntry( APP_KEY + "ChartType", int(PIE) ) ) );
+    m_addValues = AddValuesType(
+                    settings.readNumEntry( APP_KEY + "AddValues", int(NO) ));
+    m_decimalPlaces = settings.readNumEntry( APP_KEY + "Decimals", 2 );
+    m_font = QFont( "Helvetica", 18, QFont::Bold );
+    m_font.fromString(
+            settings.readEntry( APP_KEY + "Font", m_font.toString() ) );
+    for ( int i = 0; i < MAX_RECENTFILES; ++i ) {
+        QString filename = settings.readEntry( APP_KEY + "File" +
+                                               QString::number( i + 1 ) );
+        if ( !filename.isEmpty() )
+            m_recentFiles.push_back( filename );
+    }
+    if ( m_recentFiles.count() )
+        updateRecentFilesMenu();
+
+
+    // Connect *after* we've set the chart type on so we don't call
+    // drawElements() prematurely.
+    connect( chartGroup, SIGNAL( selected(QAction*) ),
+             this, SLOT( updateChartType(QAction*) ) );
+
+    resize( windowWidth, windowHeight );
+    if ( windowX != -1 || windowY != -1 )
+        move( windowX, windowY );
+
+    m_canvas = new QCanvas( this );
+    m_canvas->resize( width(), height() );
+    m_canvasView = new CanvasView( m_canvas, &m_elements, this );
+    setCentralWidget( m_canvasView );
+    m_canvasView->show();
+
+    if ( !filename.isEmpty() )
+        load( filename );
+    else {
+        init();
+        m_elements[0].set( 20, red,    14, "Red" );
+        m_elements[1].set( 70, cyan,    2, "Cyan",   darkGreen );
+        m_elements[2].set( 35, blue,   11, "Blue" );
+        m_elements[3].set( 55, yellow,  1, "Yellow", darkBlue );
+        m_elements[4].set( 80, magenta, 1, "Magenta" );
+        drawElements();
+    }
+
+    statusBar()->message( "Ready", 2000 );
+}
+
+
+ChartForm::~ChartForm()
+{
+    delete m_printer;
+}
+
+
+void ChartForm::init()
+{
+    setCaption( "Chart" );
+    m_filename = QString::null;
+    m_changed = FALSE;
+
+    m_elements[0]  = Element( Element::INVALID, red );
+    m_elements[1]  = Element( Element::INVALID, cyan );
+    m_elements[2]  = Element( Element::INVALID, blue );
+    m_elements[3]  = Element( Element::INVALID, yellow );
+    m_elements[4]  = Element( Element::INVALID, green );
+    m_elements[5]  = Element( Element::INVALID, magenta );
+    m_elements[6]  = Element( Element::INVALID, darkYellow );
+    m_elements[7]  = Element( Element::INVALID, darkRed );
+    m_elements[8]  = Element( Element::INVALID, darkCyan );
+    m_elements[9]  = Element( Element::INVALID, darkGreen );
+    m_elements[10] = Element( Element::INVALID, darkMagenta );
+    m_elements[11] = Element( Element::INVALID, darkBlue );
+    for ( int i = 12; i < MAX_ELEMENTS; ++i ) {
+        double x = (double(i) / MAX_ELEMENTS) * 360;
+        int y = (int(x * 256) % 105) + 151;
+        int z = ((i * 17) % 105) + 151;
+        m_elements[i] = Element( Element::INVALID, QColor( int(x), y, z, QColor::Hsv ) );
+    }
+}
+
+void ChartForm::closeEvent( QCloseEvent * )
+{
+    fileQuit();
+}
+
+
+void ChartForm::fileNew()
+{
+    if ( okToClear() ) {
+        init();
+        drawElements();
+    }
+}
+
+
+void ChartForm::fileOpen()
+{
+    if ( !okToClear() )
+        return;
+
+    QString filename = QFileDialog::getOpenFileName(
+                            QString::null, "Charts (*.cht)", this,
+                            "file open", "Chart -- File Open" );
+    if ( !filename.isEmpty() )
+        load( filename );
+    else
+        statusBar()->message( "File Open abandoned", 2000 );
+}
+
+
+void ChartForm::fileSaveAs()
+{
+    QString filename = QFileDialog::getSaveFileName(
+                            QString::null, "Charts (*.cht)", this,
+                            "file save as", "Chart -- File Save As" );
+    if ( !filename.isEmpty() ) {
+        int answer = 0;
+        if ( QFile::exists( filename ) )
+            answer = QMessageBox::warning(
+                            this, "Chart -- Overwrite File",
+                            QString( "Overwrite\n\'%1\'?" ).
+                                arg( filename ),
+                            "&Yes", "&No", QString::null, 1, 1 );
+        if ( answer == 0 ) {
+            m_filename = filename;
+            updateRecentFiles( filename );
+            fileSave();
+            return;
+        }
+    }
+    statusBar()->message( "Saving abandoned", 2000 );
+}
+
+
+void ChartForm::fileOpenRecent( int index )
+{
+    if ( !okToClear() )
+        return;
+
+    load( m_recentFiles[index] );
+}
+
+
+void ChartForm::updateRecentFiles( const QString& filename )
+{
+    if ( m_recentFiles.find( filename ) != m_recentFiles.end() )
+        return;
+
+    m_recentFiles.push_back( filename );
+    if ( m_recentFiles.count() > MAX_RECENTFILES )
+        m_recentFiles.pop_front();
+
+    updateRecentFilesMenu();
+}
+
+
+void ChartForm::updateRecentFilesMenu()
+{
+    for ( int i = 0; i < MAX_RECENTFILES; ++i ) {
+        if ( fileMenu->findItem( i ) )
+            fileMenu->removeItem( i );
+        if ( i < int(m_recentFiles.count()) )
+            fileMenu->insertItem( QString( "&%1 %2" ).
+                                    arg( i + 1 ).arg( m_recentFiles[i] ),
+                                  this, SLOT( fileOpenRecent(int) ),
+                                  0, i );
+    }
+}
+
+
+void ChartForm::fileQuit()
+{
+    if ( okToClear() ) {
+        saveOptions();
+        qApp->exit( 0 );
+    }
+}
+
+
+bool ChartForm::okToClear()
+{
+    if ( m_changed ) {
+        QString msg;
+        if ( m_filename.isEmpty() )
+            msg = "Unnamed chart ";
+        else
+            msg = QString( "Chart '%1'\n" ).arg( m_filename );
+        msg += "has been changed.";
+
+        int x = QMessageBox::information( this, "Chart -- Unsaved Changes",
+                                          msg, "&Save", "Cancel", "&Abandon",
+                                          0, 1 );
+        switch( x ) {
+            case 0: // Save
+                fileSave();
+                break;
+            case 1: // Cancel
+            default:
+                return FALSE;
+            case 2: // Abandon
+                break;
+        }
+    }
+
+    return TRUE;
+}
+
+
+void ChartForm::saveOptions()
+{
+    QSettings settings;
+    settings.insertSearchPath( QSettings::Windows, WINDOWS_REGISTRY );
+    settings.writeEntry( APP_KEY + "WindowWidth", width() );
+    settings.writeEntry( APP_KEY + "WindowHeight", height() );
+    settings.writeEntry( APP_KEY + "WindowX", x() );
+    settings.writeEntry( APP_KEY + "WindowY", y() );
+    settings.writeEntry( APP_KEY + "ChartType", int(m_chartType) );
+    settings.writeEntry( APP_KEY + "AddValues", int(m_addValues) );
+    settings.writeEntry( APP_KEY + "Decimals", m_decimalPlaces );
+    settings.writeEntry( APP_KEY + "Font", m_font.toString() );
+    for ( int i = 0; i < int(m_recentFiles.count()); ++i )
+        settings.writeEntry( APP_KEY + "File" + QString::number( i + 1 ),
+                             m_recentFiles[i] );
+}
+
+
+void ChartForm::optionsSetData()
+{
+    SetDataForm *setDataForm = new SetDataForm( &m_elements, m_decimalPlaces, this );
+    if ( setDataForm->exec() ) {
+        m_changed = TRUE;
+        drawElements();
+    }
+    delete setDataForm;
+}
+
+
+void ChartForm::setChartType( ChartType chartType )
+{
+    m_chartType = chartType;
+    switch ( m_chartType ) {
+        case PIE:
+            optionsPieChartAction->setOn( TRUE );
+            break;
+        case VERTICAL_BAR:
+            optionsVerticalBarChartAction->setOn( TRUE );
+            break;
+        case HORIZONTAL_BAR:
+            optionsHorizontalBarChartAction->setOn( TRUE );
+            break;
+    }
+}
+
+
+void ChartForm::updateChartType( QAction *action )
+{
+    if ( action == optionsPieChartAction ) {
+        m_chartType = PIE;
+    }
+    else if ( action == optionsHorizontalBarChartAction ) {
+        m_chartType = HORIZONTAL_BAR;
+    }
+    else if ( action == optionsVerticalBarChartAction ) {
+        m_chartType = VERTICAL_BAR;
+    }
+
+    drawElements();
+}
+
+
+void ChartForm::optionsSetFont()
+{
+    bool ok;
+    QFont font = QFontDialog::getFont( &ok, m_font, this );
+    if ( ok ) {
+        m_font = font;
+        drawElements();
+    }
+}
+
+
+void ChartForm::optionsSetOptions()
+{
+    OptionsForm *optionsForm = new OptionsForm( this );
+    optionsForm->chartTypeComboBox->setCurrentItem( m_chartType );
+    optionsForm->setFont( m_font );
+    switch ( m_addValues ) {
+        case NO:
+            optionsForm->noRadioButton->setChecked( TRUE );
+            break;
+        case YES:
+            optionsForm->yesRadioButton->setChecked( TRUE );
+            break;
+        case AS_PERCENTAGE:
+            optionsForm->asPercentageRadioButton->setChecked( TRUE );
+            break;
+    }
+    optionsForm->decimalPlacesSpinBox->setValue( m_decimalPlaces );
+    if ( optionsForm->exec() ) {
+        setChartType( ChartType(
+                optionsForm->chartTypeComboBox->currentItem()) );
+        m_font = optionsForm->font();
+        if ( optionsForm->noRadioButton->isChecked() )
+            m_addValues = NO;
+        else if ( optionsForm->yesRadioButton->isChecked() )
+            m_addValues = YES;
+        else if ( optionsForm->asPercentageRadioButton->isChecked() )
+            m_addValues = AS_PERCENTAGE;
+        m_decimalPlaces = optionsForm->decimalPlacesSpinBox->value();
+        drawElements();
+    }
+    delete optionsForm;
+}
+
+
+void ChartForm::helpHelp()
+{
+    statusBar()->message( "Help is not implemented yet", 2000 );
+}
+
+
+void ChartForm::helpAbout()
+{
+    QMessageBox::about( this, "Chart -- About",
+                        "<center><h1><font color=blue>Chart<font></h1></center>"
+                        "<p>Chart your data with <i>chart</i>.</p>"
+                        );
+}
+
+
+void ChartForm::helpAboutQt()
+{
+    QMessageBox::aboutQt( this, "Chart -- About Qt" );
+}
+
+

+ +

Main: +

#include <qapplication.h>
+#include "chartform.h"
+
+
+int main( int argc, char *argv[] )
+{
+    QApplication app( argc, argv );
+
+    QString filename;
+    if ( app.argc() > 1 ) {
+        filename = app.argv()[1];
+        if ( !filename.endsWith( ".cht" ) )
+            filename = QString::null;
+    }
+
+    ChartForm *cf = new ChartForm( filename );
+    app.setMainWidget( cf );
+    cf->show();
+
+    return app.exec();
+}
+

+ +