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426 lines
19 KiB
426 lines
19 KiB
14 years ago
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
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<!-- /home/espenr/tmp/qt-3.3.8-espenr-2499/qt-x11-free-3.3.8/examples/application/application.doc:5 -->
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<html>
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<head>
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<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
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<title>A Complete Application Window</title>
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<style type="text/css"><!--
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fn { margin-left: 1cm; text-indent: -1cm; }
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a:link { color: #004faf; text-decoration: none }
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a:visited { color: #672967; text-decoration: none }
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body { background: #ffffff; color: black; }
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--></style>
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</head>
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<body>
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<table border="0" cellpadding="0" cellspacing="0" width="100%">
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<tr bgcolor="#E5E5E5">
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<td valign=center>
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<a href="index.html">
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<font color="#004faf">Home</font></a>
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| <a href="classes.html">
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<font color="#004faf">All Classes</font></a>
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| <a href="mainclasses.html">
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<font color="#004faf">Main Classes</font></a>
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| <a href="annotated.html">
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<font color="#004faf">Annotated</font></a>
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| <a href="groups.html">
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<font color="#004faf">Grouped Classes</font></a>
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| <a href="functions.html">
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<font color="#004faf">Functions</font></a>
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</td>
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<td align="right" valign="center"><img src="logo32.png" align="right" width="64" height="32" border="0"></td></tr></table><h1 align=center>A Complete Application Window</h1>
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<p>
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<p> This example program looks like a complete modern application. It
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has a menu bar, it has a tool bar, it has a status bar and works
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like a simple text editor.
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<p> There is a <a href="simple-application.html">walkthrough</a> of
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this example.
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<p> <hr>
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<p> Header file:
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<p> <pre>/****************************************************************************
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** $Id: qt/application.h 3.3.8 edited Jan 11 14:37 $
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**
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** Copyright (C) 1992-2007 Trolltech ASA. All rights reserved.
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**
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** This file is part of an example program for Qt. This example
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** program may be used, distributed and modified without limitation.
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**
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*****************************************************************************/
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#ifndef APPLICATION_H
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#define APPLICATION_H
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#include <<a href="qmainwindow-h.html">qmainwindow.h</a>>
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class QTextEdit;
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class ApplicationWindow: public <a href="qmainwindow.html">QMainWindow</a>
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{
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<a href="metaobjects.html#Q_OBJECT">Q_OBJECT</a>
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public:
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ApplicationWindow();
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~ApplicationWindow();
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protected:
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void closeEvent( <a href="qcloseevent.html">QCloseEvent</a>* );
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private slots:
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void newDoc();
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void choose();
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void load( const <a href="qstring.html">QString</a> &fileName );
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void save();
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void saveAs();
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void print();
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void about();
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void aboutQt();
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private:
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<a href="qprinter.html">QPrinter</a> *printer;
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<a href="qtextedit.html">QTextEdit</a> *e;
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<a href="qstring.html">QString</a> filename;
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};
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#endif
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</pre>
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<p> <hr>
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<p> Implementation:
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<p> <pre>/****************************************************************************
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** $Id: qt/application.cpp 3.3.8 edited Jan 11 14:37 $
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**
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** Copyright (C) 1992-2007 Trolltech ASA. All rights reserved.
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**
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** This file is part of an example program for Qt. This example
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** program may be used, distributed and modified without limitation.
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**
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*****************************************************************************/
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#include "application.h"
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#include <<a href="qimage-h.html">qimage.h</a>>
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#include <<a href="qpixmap-h.html">qpixmap.h</a>>
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#include <<a href="qtoolbar-h.html">qtoolbar.h</a>>
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#include <<a href="qtoolbutton-h.html">qtoolbutton.h</a>>
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#include <<a href="qpopupmenu-h.html">qpopupmenu.h</a>>
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#include <<a href="qmenubar-h.html">qmenubar.h</a>>
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#include <<a href="qtextedit-h.html">qtextedit.h</a>>
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#include <<a href="qfile-h.html">qfile.h</a>>
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#include <<a href="qfiledialog-h.html">qfiledialog.h</a>>
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#include <<a href="qstatusbar-h.html">qstatusbar.h</a>>
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#include <<a href="qmessagebox-h.html">qmessagebox.h</a>>
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#include <<a href="qprinter-h.html">qprinter.h</a>>
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#include <<a href="qapplication-h.html">qapplication.h</a>>
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#include <<a href="qaccel-h.html">qaccel.h</a>>
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#include <<a href="qtextstream-h.html">qtextstream.h</a>>
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#include <<a href="qpainter-h.html">qpainter.h</a>>
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#include <<a href="qpaintdevicemetrics-h.html">qpaintdevicemetrics.h</a>>
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#include <<a href="qwhatsthis-h.html">qwhatsthis.h</a>>
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#include <<a href="qsimplerichtext-h.html">qsimplerichtext.h</a>>
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#include "filesave.xpm"
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#include "fileopen.xpm"
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#include "fileprint.xpm"
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<a name="f459"></a>ApplicationWindow::ApplicationWindow()
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: <a href="qmainwindow.html">QMainWindow</a>( 0, "example application main window", WDestructiveClose | WGroupLeader )
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{
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printer = new <a href="qprinter.html">QPrinter</a>( QPrinter::HighResolution );
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<a href="qpixmap.html">QPixmap</a> openIcon, saveIcon, printIcon;
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<a href="qtoolbar.html">QToolBar</a> * fileTools = new <a href="qtoolbar.html">QToolBar</a>( this, "file operations" );
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<a name="x1590"></a> fileTools-><a href="qtoolbar.html#setLabel">setLabel</a>( "File Operations" );
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openIcon = QPixmap( fileopen );
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QToolButton * fileOpen
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= new <a href="qtoolbutton.html">QToolButton</a>( openIcon, "Open File", <a href="qstring.html#QString-null">QString::null</a>,
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this, SLOT(choose()), fileTools, "open file" );
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saveIcon = QPixmap( filesave );
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QToolButton * fileSave
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= new <a href="qtoolbutton.html">QToolButton</a>( saveIcon, "Save File", QString::null,
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this, SLOT(save()), fileTools, "save file" );
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printIcon = QPixmap( fileprint );
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QToolButton * filePrint
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= new <a href="qtoolbutton.html">QToolButton</a>( printIcon, "Print File", QString::null,
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this, SLOT(print()), fileTools, "print file" );
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(void)QWhatsThis::whatsThisButton( fileTools );
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const char * fileOpenText = "<p><img source=\"fileopen\"> "
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"Click this button to open a <em>new file</em>.<br>"
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"You can also select the <b>Open</b> command "
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"from the <b>File</b> menu.</p>";
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<a name="x1591"></a> QWhatsThis::<a href="qwhatsthis.html#add">add</a>( fileOpen, fileOpenText );
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<a name="x1558"></a> QMimeSourceFactory::<a href="qmimesourcefactory.html#defaultFactory">defaultFactory</a>()->setPixmap( "fileopen", openIcon );
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const char * fileSaveText = "<p>Click this button to save the file you "
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"are editing. You will be prompted for a file name.\n"
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"You can also select the <b>Save</b> command "
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"from the <b>File</b> menu.</p>";
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QWhatsThis::<a href="qwhatsthis.html#add">add</a>( fileSave, fileSaveText );
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const char * filePrintText = "Click this button to print the file you "
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"are editing.\n"
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"You can also select the Print command "
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"from the File menu.";
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QWhatsThis::<a href="qwhatsthis.html#add">add</a>( filePrint, filePrintText );
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<a href="qpopupmenu.html">QPopupMenu</a> * file = new <a href="qpopupmenu.html">QPopupMenu</a>( this );
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<a href="qmainwindow.html#menuBar">menuBar</a>()->insertItem( "&File", file );
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file-><a href="qmenudata.html#insertItem">insertItem</a>( "&New", this, SLOT(newDoc()), CTRL+Key_N );
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int id;
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id = file-><a href="qmenudata.html#insertItem">insertItem</a>( openIcon, "&Open...",
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this, SLOT(choose()), CTRL+Key_O );
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<a name="x1554"></a> file-><a href="qmenudata.html#setWhatsThis">setWhatsThis</a>( id, fileOpenText );
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id = file-><a href="qmenudata.html#insertItem">insertItem</a>( saveIcon, "&Save",
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this, SLOT(save()), CTRL+Key_S );
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file-><a href="qmenudata.html#setWhatsThis">setWhatsThis</a>( id, fileSaveText );
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id = file-><a href="qmenudata.html#insertItem">insertItem</a>( "Save &As...", this, SLOT(saveAs()) );
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file-><a href="qmenudata.html#setWhatsThis">setWhatsThis</a>( id, fileSaveText );
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file-><a href="qmenudata.html#insertSeparator">insertSeparator</a>();
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id = file-><a href="qmenudata.html#insertItem">insertItem</a>( printIcon, "&Print...",
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this, SLOT(print()), CTRL+Key_P );
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file-><a href="qmenudata.html#setWhatsThis">setWhatsThis</a>( id, filePrintText );
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file-><a href="qmenudata.html#insertSeparator">insertSeparator</a>();
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file-><a href="qmenudata.html#insertItem">insertItem</a>( "&Close", this, SLOT(<a href="qwidget.html#close">close</a>()), CTRL+Key_W );
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<a name="x1544"></a> file-><a href="qmenudata.html#insertItem">insertItem</a>( "&Quit", qApp, SLOT( <a href="qapplication.html#closeAllWindows">closeAllWindows</a>() ), CTRL+Key_Q );
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<a href="qmainwindow.html#menuBar">menuBar</a>()->insertSeparator();
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<a href="qpopupmenu.html">QPopupMenu</a> * help = new <a href="qpopupmenu.html">QPopupMenu</a>( this );
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<a href="qmainwindow.html#menuBar">menuBar</a>()->insertItem( "&Help", help );
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help-><a href="qmenudata.html#insertItem">insertItem</a>( "&About", this, SLOT(about()), Key_F1 );
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help-><a href="qmenudata.html#insertItem">insertItem</a>( "About &Qt", this, SLOT(aboutQt()) );
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help-><a href="qmenudata.html#insertSeparator">insertSeparator</a>();
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help-><a href="qmenudata.html#insertItem">insertItem</a>( "What's &This", this, SLOT(<a href="qmainwindow.html#whatsThis">whatsThis</a>()), SHIFT+Key_F1 );
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e = new <a href="qtextedit.html">QTextEdit</a>( this, "editor" );
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e-><a href="qwidget.html#setFocus">setFocus</a>();
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<a href="qmainwindow.html#setCentralWidget">setCentralWidget</a>( e );
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<a href="qmainwindow.html#statusBar">statusBar</a>()->message( "Ready", 2000 );
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<a href="qwidget.html#resize">resize</a>( 450, 600 );
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}
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ApplicationWindow::~ApplicationWindow()
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{
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delete printer;
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}
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void <a name="f460"></a>ApplicationWindow::newDoc()
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{
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ApplicationWindow *ed = new ApplicationWindow;
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ed-><a href="qwidget.html#setCaption">setCaption</a>("Qt Example - Application");
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ed-><a href="qwidget.html#show">show</a>();
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}
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void <a name="f461"></a>ApplicationWindow::choose()
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{
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<a name="x1549"></a> <a href="qstring.html">QString</a> fn = QFileDialog::<a href="qfiledialog.html#getOpenFileName">getOpenFileName</a>( QString::null, QString::null,
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this);
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if ( !fn.<a href="qstring.html#isEmpty">isEmpty</a>() )
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load( fn );
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else
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<a href="qmainwindow.html#statusBar">statusBar</a>()->message( "Loading aborted", 2000 );
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}
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void <a name="f462"></a>ApplicationWindow::load( const <a href="qstring.html">QString</a> &fileName )
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{
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<a href="qfile.html">QFile</a> f( fileName );
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<a name="x1548"></a> if ( !f.<a href="qfile.html#open">open</a>( <a href="qfile.html#open">IO_ReadOnly</a> ) )
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return;
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<a href="qtextstream.html">QTextStream</a> ts( &f );
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<a name="x1589"></a><a name="x1586"></a> e-><a href="qtextedit.html#setText">setText</a>( ts.<a href="qtextstream.html#read">read</a>() );
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<a name="x1585"></a> e-><a href="qtextedit.html#setModified">setModified</a>( FALSE );
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<a href="qwidget.html#setCaption">setCaption</a>( fileName );
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<a href="qmainwindow.html#statusBar">statusBar</a>()->message( "Loaded document " + fileName, 2000 );
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}
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void <a name="f463"></a>ApplicationWindow::save()
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{
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if ( filename.isEmpty() ) {
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saveAs();
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return;
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}
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<a name="x1588"></a> <a href="qstring.html">QString</a> text = e-><a href="qtextedit.html#text">text</a>();
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<a href="qfile.html">QFile</a> f( filename );
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if ( !f.<a href="qfile.html#open">open</a>( <a href="qfile.html#open">IO_WriteOnly</a> ) ) {
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<a href="qmainwindow.html#statusBar">statusBar</a>()->message( QString("Could not write to %1").arg(filename),
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2000 );
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return;
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}
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<a href="qtextstream.html">QTextStream</a> t( &f );
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t << text;
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f.<a href="qfile.html#close">close</a>();
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e-><a href="qtextedit.html#setModified">setModified</a>( FALSE );
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<a href="qwidget.html#setCaption">setCaption</a>( filename );
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<a href="qmainwindow.html#statusBar">statusBar</a>()->message( QString( "File %1 saved" ).arg( filename ), 2000 );
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}
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void <a name="f464"></a>ApplicationWindow::saveAs()
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{
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<a name="x1550"></a> <a href="qstring.html">QString</a> fn = QFileDialog::<a href="qfiledialog.html#getSaveFileName">getSaveFileName</a>( QString::null, QString::null,
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this );
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if ( !fn.<a href="qstring.html#isEmpty">isEmpty</a>() ) {
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filename = fn;
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save();
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} else {
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<a href="qmainwindow.html#statusBar">statusBar</a>()->message( "Saving aborted", 2000 );
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||
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}
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||
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}
|
||
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void <a name="f465"></a>ApplicationWindow::print()
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||
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|
{
|
||
|
|
<a name="x1568"></a> printer-><a href="qprinter.html#setFullPage">setFullPage</a>( TRUE );
|
||
|
|
<a name="x1569"></a> if ( printer-><a href="qprinter.html#setup">setup</a>(this) ) { // printer dialog
|
||
|
|
<a href="qmainwindow.html#statusBar">statusBar</a>()->message( "Printing..." );
|
||
|
|
<a href="qpainter.html">QPainter</a> p;
|
||
|
|
if( !p.<a href="qpainter.html#begin">begin</a>( printer ) ) { // paint on printer
|
||
|
|
<a href="qmainwindow.html#statusBar">statusBar</a>()->message( "Printing aborted", 2000 );
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
|
||
|
|
<a name="x1563"></a> <a href="qpaintdevicemetrics.html">QPaintDeviceMetrics</a> metrics( p.<a href="qpainter.html#device">device</a>() );
|
||
|
|
<a name="x1560"></a> int dpiy = metrics.<a href="qpaintdevicemetrics.html#logicalDpiY">logicalDpiY</a>();
|
||
|
|
int margin = (int) ( (2/2.54)*dpiy ); // 2 cm margins
|
||
|
|
<a name="x1561"></a><a name="x1559"></a> <a href="qrect.html">QRect</a> view( margin, margin, metrics.<a href="qpaintdevicemetrics.html#width">width</a>() - 2*margin, metrics.<a href="qpaintdevicemetrics.html#height">height</a>() - 2*margin );
|
||
|
|
<a name="x1581"></a> <a href="qsimplerichtext.html">QSimpleRichText</a> richText( QStyleSheet::<a href="qstylesheet.html#convertFromPlainText">convertFromPlainText</a>(e-><a href="qtextedit.html#text">text</a>()),
|
||
|
|
QFont(),
|
||
|
|
<a name="x1582"></a> e-><a href="qtextedit.html#context">context</a>(),
|
||
|
|
<a name="x1587"></a> e-><a href="qtextedit.html#styleSheet">styleSheet</a>(),
|
||
|
|
<a name="x1584"></a> e-><a href="qtextedit.html#mimeSourceFactory">mimeSourceFactory</a>(),
|
||
|
|
view.<a href="qrect.html#height">height</a>() );
|
||
|
|
<a name="x1578"></a> richText.<a href="qsimplerichtext.html#setWidth">setWidth</a>( &p, view.<a href="qrect.html#width">width</a>() );
|
||
|
|
int page = 1;
|
||
|
|
do {
|
||
|
|
<a name="x1576"></a> richText.<a href="qsimplerichtext.html#draw">draw</a>( &p, margin, margin, view, colorGroup() );
|
||
|
|
<a name="x1572"></a> view.<a href="qrect.html#moveBy">moveBy</a>( 0, view.<a href="qrect.html#height">height</a>() );
|
||
|
|
<a name="x1566"></a> p.<a href="qpainter.html#translate">translate</a>( 0 , -view.<a href="qrect.html#height">height</a>() );
|
||
|
|
<a name="x1580"></a><a name="x1573"></a><a name="x1565"></a> p.<a href="qpainter.html#drawText">drawText</a>( view.<a href="qrect.html#right">right</a>() - p.<a href="qpainter.html#fontMetrics">fontMetrics</a>().width( QString::<a href="qstring.html#number">number</a>( page ) ),
|
||
|
|
<a name="x1570"></a> view.<a href="qrect.html#bottom">bottom</a>() + p.<a href="qpainter.html#fontMetrics">fontMetrics</a>().ascent() + 5, QString::number( page ) );
|
||
|
|
<a name="x1577"></a> if ( view.<a href="qrect.html#top">top</a>() - margin >= richText.<a href="qsimplerichtext.html#height">height</a>() )
|
||
|
|
break;
|
||
|
|
<a name="x1567"></a> printer-><a href="qprinter.html#newPage">newPage</a>();
|
||
|
|
page++;
|
||
|
|
} while (TRUE);
|
||
|
|
|
||
|
|
<a href="qmainwindow.html#statusBar">statusBar</a>()->message( "Printing completed", 2000 );
|
||
|
|
} else {
|
||
|
|
<a href="qmainwindow.html#statusBar">statusBar</a>()->message( "Printing aborted", 2000 );
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
<a name="x1592"></a>void ApplicationWindow::<a href="qwidget.html#closeEvent">closeEvent</a>( <a href="qcloseevent.html">QCloseEvent</a>* ce )
|
||
|
|
{
|
||
|
|
<a name="x1583"></a> if ( !e-><a href="qtextedit.html#isModified">isModified</a>() ) {
|
||
|
|
<a name="x1545"></a> ce-><a href="qcloseevent.html#accept">accept</a>();
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
|
||
|
|
<a name="x1557"></a> switch( QMessageBox::<a href="qmessagebox.html#information">information</a>( this, "Qt Application Example",
|
||
|
|
"Do you want to save the changes"
|
||
|
|
" to the document?",
|
||
|
|
"Yes", "No", "Cancel",
|
||
|
|
0, 1 ) ) {
|
||
|
|
case 0:
|
||
|
|
save();
|
||
|
|
ce-><a href="qcloseevent.html#accept">accept</a>();
|
||
|
|
break;
|
||
|
|
case 1:
|
||
|
|
ce-><a href="qcloseevent.html#accept">accept</a>();
|
||
|
|
break;
|
||
|
|
case 2:
|
||
|
|
default: // just for sanity
|
||
|
|
<a name="x1546"></a> ce-><a href="qcloseevent.html#ignore">ignore</a>();
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
void <a name="f466"></a>ApplicationWindow::about()
|
||
|
|
{
|
||
|
|
<a name="x1555"></a> QMessageBox::<a href="qmessagebox.html#about">about</a>( this, "Qt Application Example",
|
||
|
|
"This example demonstrates simple use of "
|
||
|
|
"QMainWindow,\nQMenuBar and QToolBar.");
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
void <a name="f467"></a>ApplicationWindow::aboutQt()
|
||
|
|
{
|
||
|
|
<a name="x1556"></a> QMessageBox::<a href="qmessagebox.html#aboutQt">aboutQt</a>( this, "Qt Application Example" );
|
||
|
|
}
|
||
|
|
</pre>
|
||
|
|
|
||
|
|
<p> <hr>
|
||
|
|
<p> Main:
|
||
|
|
<p> <pre>/****************************************************************************
|
||
|
|
** $Id: qt/main.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 <<a href="qapplication-h.html">qapplication.h</a>>
|
||
|
|
#include "application.h"
|
||
|
|
|
||
|
|
int main( int argc, char ** argv ) {
|
||
|
|
<a href="qapplication.html">QApplication</a> a( argc, argv );
|
||
|
|
ApplicationWindow *mw = new ApplicationWindow();
|
||
|
|
mw-><a href="qwidget.html#setCaption">setCaption</a>( "Qt Example - Application" );
|
||
|
|
<a name="x1598"></a> mw-><a href="qwidget.html#show">show</a>();
|
||
|
|
<a name="x1599"></a> a.<a href="qobject.html#connect">connect</a>( &a, SIGNAL(<a href="qapplication.html#lastWindowClosed">lastWindowClosed</a>()), &a, SLOT(<a href="qapplication.html#quit">quit</a>()) );
|
||
|
|
return a.<a href="qapplication.html#exec">exec</a>();
|
||
|
|
}
|
||
|
|
</pre>
|
||
|
|
|
||
|
|
<p>See also <a href="examples.html">Examples</a>.
|
||
|
|
|
||
|
|
<!-- eof -->
|
||
|
|
<p><address><hr><div align=center>
|
||
|
|
<table width=100% cellspacing=0 border=0><tr>
|
||
|
|
<td>Copyright © 2007
|
||
|
|
<a href="troll.html">Trolltech</a><td align=center><a href="trademarks.html">Trademarks</a>
|
||
|
|
<td align=right><div align=right>Qt 3.3.8</div>
|
||
|
|
</table></div></address></body>
|
||
|
|
</html>
|