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/menu-example.html | 472 +++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 472 insertions(+) create mode 100644 doc/html/menu-example.html (limited to 'doc/html/menu-example.html') diff --git a/doc/html/menu-example.html b/doc/html/menu-example.html new file mode 100644 index 0000000..2882a3f --- /dev/null +++ b/doc/html/menu-example.html @@ -0,0 +1,472 @@ + + + + + +Using menus + + + + + + + +

Using menus

+ + +

+This example demonstrates a menu bar with pull-down menus, +sub-menus and custom menu items. It also demonstrates a pop-up +context menu. +

Header file: +

/****************************************************************************
+** $Id: qt/menu.h   3.3.8   edited Jan 11 14:37 $
+**
+** Copyright (C) 1992-2007 Trolltech ASA.  All rights reserved.
+**
+** This file is part of an example program for Qt.  This example
+** program may be used, distributed and modified without limitation.
+**
+*****************************************************************************/
+
+#ifndef MENU_H
+#define MENU_H
+
+#include <qwidget.h>
+#include <qmenubar.h>
+#include <qlabel.h>
+
+
+class MenuExample : public QWidget
+{
+    Q_OBJECT
+public:
+    MenuExample( QWidget *parent=0, const char *name=0 );
+
+public slots:
+    void open();
+    void news();
+    void save();
+    void closeDoc();
+    void undo();
+    void redo();
+    void normal();
+    void bold();
+    void underline();
+    void about();
+    void aboutQt();
+    void printer();
+    void file();
+    void fax();
+    void printerSetup();
+
+protected:
+    void    resizeEvent( QResizeEvent * );
+
+signals:
+    void    explain( const QString& );
+
+private:
+    void contextMenuEvent ( QContextMenuEvent * );
+
+
+    QMenuBar *menu;
+    QLabel   *label;
+    bool isBold;
+    bool isUnderline;
+    int boldID, underlineID;
+};
+
+
+#endif // MENU_H
+

+ +

Implementation: +

/****************************************************************************
+** $Id: qt/menu.cpp   3.3.8   edited Jan 11 14:37 $
+**
+** Copyright (C) 1992-2007 Trolltech ASA.  All rights reserved.
+**
+** This file is part of an example program for Qt.  This example
+** program may be used, distributed and modified without limitation.
+**
+*****************************************************************************/
+
+#include "menu.h"
+#include <qcursor.h>
+#include <qpopupmenu.h>
+#include <qapplication.h>
+#include <qmessagebox.h>
+#include <qpixmap.h>
+#include <qpainter.h>
+
+/* XPM */
+static const char * p1_xpm[] = {
+"16 16 3 1",
+"       c None",
+".      c #000000000000",
+"X      c #FFFFFFFF0000",
+"                ",
+"                ",
+"         ....   ",
+"        .XXXX.  ",
+" .............. ",
+" .XXXXXXXXXXXX. ",
+" .XXXXXXXXXXXX. ",
+" .XXXXXXXXXXXX. ",
+" .XXXXXXXXXXXX. ",
+" .XXXXXXXXXXXX. ",
+" .XXXXXXXXXXXX. ",
+" .XXXXXXXXXXXX. ",
+" .XXXXXXXXXXXX. ",
+" .XXXXXXXXXXXX. ",
+" .............. ",
+"                "};
+
+/* XPM */
+static const char * p2_xpm[] = {
+"16 16 3 1",
+"       c None",
+".      c #000000000000",
+"X      c #FFFFFFFFFFFF",
+"                ",
+"   ......       ",
+"   .XXX.X.      ",
+"   .XXX.XX.     ",
+"   .XXX.XXX.    ",
+"   .XXX.....    ",
+"   .XXXXXXX.    ",
+"   .XXXXXXX.    ",
+"   .XXXXXXX.    ",
+"   .XXXXXXX.    ",
+"   .XXXXXXX.    ",
+"   .XXXXXXX.    ",
+"   .XXXXXXX.    ",
+"   .........    ",
+"                ",
+"                "};
+
+/* XPM */
+static const char * p3_xpm[] = {
+"16 16 3 1",
+"       c None",
+".      c #000000000000",
+"X      c #FFFFFFFFFFFF",
+"                ",
+"                ",
+"   .........    ",
+"  ...........   ",
+"  ........ ..   ",
+"  ...........   ",
+"  ...........   ",
+"  ...........   ",
+"  ...........   ",
+"  ...XXXXX...   ",
+"  ...XXXXX...   ",
+"  ...XXXXX...   ",
+"  ...XXXXX...   ",
+"   .........    ",
+"                ",
+"                "};
+
+
+/*
+  Auxiliary class to provide fancy menu items with different
+  fonts. Used for the "bold" and "underline" menu items in the options
+  menu.
+ */
+class MyMenuItem : public QCustomMenuItem
+{
+public:
+    MyMenuItem( const QString& s, const QFont& f )
+        : string( s ), font( f ){};
+    ~MyMenuItem(){}
+
+    void paint( QPainter* p, const QColorGroup& /*cg*/, bool /*act*/, bool /*enabled*/, int x, int y, int w, int h )
+    {
+        p->setFont ( font );
+        p->drawText( x, y, w, h, AlignLeft | AlignVCenter | DontClip | ShowPrefix, string );
+    }
+
+    QSize sizeHint()
+    {
+        return QFontMetrics( font ).size( AlignLeft | AlignVCenter | ShowPrefix | DontClip,  string );
+    }
+private:
+    QString string;
+    QFont font;
+};
+
+
+MenuExample::MenuExample( QWidget *parent, const char *name )
+    : QWidget( parent, name )
+{
+    QPixmap p1( p1_xpm );
+    QPixmap p2( p2_xpm );
+    QPixmap p3( p3_xpm );
+    QPopupMenu *print = new QPopupMenu( this );
+    Q_CHECK_PTR( print );
+    print->insertTearOffHandle();
+    print->insertItem( "&Print to printer", this, SLOT(printer()) );
+    print->insertItem( "Print to &file", this, SLOT(file()) );
+    print->insertItem( "Print to fa&x", this, SLOT(fax()) );
+    print->insertSeparator();
+    print->insertItem( "Printer &Setup", this, SLOT(printerSetup()) );
+
+    QPopupMenu *file = new QPopupMenu( this );
+    Q_CHECK_PTR( file );
+    file->insertItem( p1, "&Open",  this, SLOT(open()), CTRL+Key_O );
+    file->insertItem( p2, "&New", this, SLOT(news()), CTRL+Key_N );
+    file->insertItem( p3, "&Save", this, SLOT(save()), CTRL+Key_S );
+    file->insertItem( "&Close", this, SLOT(closeDoc()), CTRL+Key_W );
+    file->insertSeparator();
+    file->insertItem( "&Print", print, CTRL+Key_P );
+    file->insertSeparator();
+    file->insertItem( "E&xit",  qApp, SLOT(quit()), CTRL+Key_Q );
+
+    QPopupMenu *edit = new QPopupMenu( this );
+    Q_CHECK_PTR( edit );
+    int undoID = edit->insertItem( "&Undo", this, SLOT(undo()) );
+    int redoID = edit->insertItem( "&Redo", this, SLOT(redo()) );
+    edit->setItemEnabled( undoID, FALSE );
+    edit->setItemEnabled( redoID, FALSE );
+
+    QPopupMenu* options = new QPopupMenu( this );
+    Q_CHECK_PTR( options );
+    options->insertTearOffHandle();
+    options->setCaption("Options");
+    options->insertItem( "&Normal Font", this, SLOT(normal()) );
+    options->insertSeparator();
+
+    options->polish(); // adjust system settings
+    QFont f = options->font();
+    f.setBold( TRUE );
+    boldID = options->insertItem( new MyMenuItem( "Bold", f ) );
+    options->setAccel( CTRL+Key_B, boldID );
+    options->connectItem( boldID, this, SLOT(bold()) );
+    f = font();
+    f.setUnderline( TRUE );
+    underlineID = options->insertItem( new MyMenuItem( "Underline", f ) );
+    options->setAccel( CTRL+Key_U, underlineID );
+    options->connectItem( underlineID, this, SLOT(underline()) );
+
+    isBold = FALSE;
+    isUnderline = FALSE;
+    options->setCheckable( TRUE );
+
+
+    QPopupMenu *help = new QPopupMenu( this );
+    Q_CHECK_PTR( help );
+    help->insertItem( "&About", this, SLOT(about()), CTRL+Key_H );
+    help->insertItem( "About &Qt", this, SLOT(aboutQt()) );
+
+    // If we used a QMainWindow we could use its built-in menuBar().
+    menu = new QMenuBar( this );
+    Q_CHECK_PTR( menu );
+    menu->insertItem( "&File", file );
+    menu->insertItem( "&Edit", edit );
+    menu->insertItem( "&Options", options );
+    menu->insertSeparator();
+    menu->insertItem( "&Help", help );
+    menu->setSeparator( QMenuBar::InWindowsStyle );
+
+
+    QLabel *msg = new QLabel( this );
+    Q_CHECK_PTR( msg );
+    msg->setText( "A context menu is available.\n"
+                  "Invoke it by right-clicking or by"
+                  " pressing the 'context' button." );
+    msg->setGeometry( 0, height() - 60, width(), 60 );
+    msg->setAlignment( AlignCenter );
+
+    label = new QLabel( this );
+    Q_CHECK_PTR( label );
+    label->setGeometry( 20, rect().center().y()-20, width()-40, 40 );
+    label->setFrameStyle( QFrame::Box | QFrame::Raised );
+    label->setLineWidth( 1 );
+    label->setAlignment( AlignCenter );
+
+    connect( this,  SIGNAL(explain(const QString&)),
+             label, SLOT(setText(const QString&)) );
+
+    setMinimumSize( 100, 80 );
+    setFocusPolicy( QWidget::ClickFocus );
+}
+
+
+void MenuExample::contextMenuEvent( QContextMenuEvent * )
+{
+    QPopupMenu* contextMenu = new QPopupMenu( this );
+    Q_CHECK_PTR( contextMenu );
+    QLabel *caption = new QLabel( "<font color=darkblue><u><b>"
+        "Context Menu</b></u></font>", this );
+    caption->setAlignment( Qt::AlignCenter );
+    contextMenu->insertItem( caption );
+    contextMenu->insertItem( "&New",  this, SLOT(news()), CTRL+Key_N );
+    contextMenu->insertItem( "&Open...", this, SLOT(open()), CTRL+Key_O );
+    contextMenu->insertItem( "&Save", this, SLOT(save()), CTRL+Key_S );
+    QPopupMenu *submenu = new QPopupMenu( this );
+    Q_CHECK_PTR( submenu );
+    submenu->insertItem( "&Print to printer", this, SLOT(printer()) );
+    submenu->insertItem( "Print to &file", this, SLOT(file()) );
+    submenu->insertItem( "Print to fa&x", this, SLOT(fax()) );
+    contextMenu->insertItem( "&Print", submenu );
+    contextMenu->exec( QCursor::pos() );
+    delete contextMenu;
+}
+
+
+void MenuExample::open()
+{
+    emit explain( "File/Open selected" );
+}
+
+
+void MenuExample::news()
+{
+    emit explain( "File/New selected" );
+}
+
+void MenuExample::save()
+{
+    emit explain( "File/Save selected" );
+}
+
+
+void MenuExample::closeDoc()
+{
+    emit explain( "File/Close selected" );
+}
+
+
+void MenuExample::undo()
+{
+    emit explain( "Edit/Undo selected" );
+}
+
+
+void MenuExample::redo()
+{
+    emit explain( "Edit/Redo selected" );
+}
+
+
+void MenuExample::normal()
+{
+    isBold = FALSE;
+    isUnderline = FALSE;
+    QFont font;
+    label->setFont( font );
+    menu->setItemChecked( boldID, isBold );
+    menu->setItemChecked( underlineID, isUnderline );
+    emit explain( "Options/Normal selected" );
+}
+
+
+void MenuExample::bold()
+{
+    isBold = !isBold;
+    QFont font;
+    font.setBold( isBold );
+    font.setUnderline( isUnderline );
+    label->setFont( font );
+    menu->setItemChecked( boldID, isBold );
+    emit explain( "Options/Bold selected" );
+}
+
+
+void MenuExample::underline()
+{
+    isUnderline = !isUnderline;
+    QFont font;
+    font.setBold( isBold );
+    font.setUnderline( isUnderline );
+    label->setFont( font );
+    menu->setItemChecked( underlineID, isUnderline );
+    emit explain( "Options/Underline selected" );
+}
+
+
+void MenuExample::about()
+{
+    QMessageBox::about( this, "Qt Menu Example",
+                        "This example demonstrates simple use of Qt menus.\n"
+                        "You can cut and paste lines from it to your own\n"
+                        "programs." );
+}
+
+
+void MenuExample::aboutQt()
+{
+    QMessageBox::aboutQt( this, "Qt Menu Example" );
+}
+
+
+void MenuExample::printer()
+{
+    emit explain( "File/Printer/Print selected" );
+}
+
+void MenuExample::file()
+{
+    emit explain( "File/Printer/Print To File selected" );
+}
+
+void MenuExample::fax()
+{
+    emit explain( "File/Printer/Print To Fax selected" );
+}
+
+void MenuExample::printerSetup()
+{
+    emit explain( "File/Printer/Printer Setup selected" );
+}
+
+
+void MenuExample::resizeEvent( QResizeEvent * )
+{
+    label->setGeometry( 20, rect().center().y()-20, width()-40, 40 );
+}
+
+
+int main( int argc, char ** argv )
+{
+    QApplication a( argc, argv );
+    MenuExample m;
+    m.setCaption("Qt Examples - Menus");
+    a.setMainWidget( &m );
+    m.show();
+    return a.exec();
+}
+

+ +