/****************************************************************************
** $Id: application.cpp,v 1.16.2.1 1999/02/01 19:58:21 hanord Exp $
**
** Copyright (C) 1992-1998 Troll Tech AS. 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 "application.h"
#include <qpixmap.h>
#include <qtoolbar.h>
#include <qtoolbutton.h>
#include <qpopupmenu.h>
#include <qmenubar.h>
#include <qkeycode.h>
#include <qmultilinedit.h>
#include <qfile.h>
#include <qfiledialog.h>
#include <qstatusbar.h>
#include <qmessagebox.h>
#include <qprinter.h>
#include <qapplication.h>
#include <qaccel.h>
#include <qtextstream.h>
#include <qpainter.h>
#include <qpaintdevicemetrics.h>
#include <qwhatsthis.h>
#include "filesave.xpm"
#include "fileopen.xpm"
#include "fileprint.xpm"
const char * fileOpenText = "Click this button to open a new file.\n\n"
"You can also select the Open command from the File menu.";
const char * fileSaveText = "Click this button to save the file you are "
"editing. You will be prompted for a file name.\n\n"
"You can also select the Save command from the File menu.\n\n"
"Note that implementing this function is left as an exercise for the reader.";
const char * filePrintText = "Click this button to print the file you "
"are editing.\n\n"
"You can also select the Print command from the File menu.";
ApplicationWindow::ApplicationWindow()
: QMainWindow( 0, "example application main window" )
{
printer = new QPrinter;
printer->setMinMax( 1, 10 );
QPixmap openIcon, saveIcon, printIcon;
fileTools = new QToolBar( this, "file operations" );
openIcon = QPixmap( fileopen );
QToolButton * fileOpen = new QToolButton( openIcon, "Open File", 0,
this, SLOT(load()),
fileTools, "open file" );
saveIcon = QPixmap( filesave );
QToolButton * fileSave = new QToolButton( saveIcon, "Save File", 0,
this, SLOT(save()),
fileTools, "save file" );
printIcon = QPixmap( fileprint );
QToolButton * filePrint = new QToolButton( printIcon, "Print File", 0,
this, SLOT(print()),
fileTools, "print file" );
(void)QWhatsThis::whatsThisButton( fileTools );
QWhatsThis::add( fileOpen, fileOpenText, FALSE );
QWhatsThis::add( fileSave, fileSaveText, FALSE );
QWhatsThis::add( filePrint, filePrintText, FALSE );
QPopupMenu * file = new QPopupMenu();
menuBar()->insertItem( "&File", file );
file->insertItem( "New", this, SLOT(newDoc()), CTRL+Key_N );
file->insertItem( openIcon, "Open", this, SLOT(load()), CTRL+Key_O );
file->insertItem( saveIcon, "Save", this, SLOT(save()), CTRL+Key_S );
file->insertSeparator();
file->insertItem( printIcon, "Print", this, SLOT(print()), CTRL+Key_P );
file->insertSeparator();
file->insertItem( "Close", this, SLOT(closeDoc()), CTRL+Key_W );
file->insertItem( "Quit", qApp, SLOT(quit()), CTRL+Key_Q );
controls = new QPopupMenu();
menuBar()->insertItem( "&Controls", controls );
mb = controls->insertItem( "Menu bar", this, SLOT(toggleMenuBar()), CTRL+Key_M);
// Now an accelerator for when the menubar is invisible!
QAccel* a = new QAccel(this);
a->connectItem( a->insertItem( CTRL+Key_M ), this, SLOT(toggleMenuBar()) );
tb = controls->insertItem( "Tool bar", this, SLOT(toggleToolBar()), CTRL+Key_T);
sb = controls->insertItem( "Status bar", this, SLOT(toggleStatusBar()), CTRL+Key_B);
controls->setCheckable( TRUE );
controls->setItemChecked( mb, TRUE );
controls->setItemChecked( tb, TRUE );
controls->setItemChecked( sb, TRUE );
e = new QMultiLineEdit( this, "editor" );
e->setFocus();
setCentralWidget( e );
statusBar()->message( "Ready", 2000 );
}
/*! Destroys the object and frees any allocated resources.
*/
ApplicationWindow::~ApplicationWindow()
{
delete printer;
}
void ApplicationWindow::newDoc()
{
ApplicationWindow *ed = new ApplicationWindow;
ed->resize( 400, 400 );
ed->show();
}
void ApplicationWindow::load()
{
QString fn = QFileDialog::getOpenFileName(0,0,this);
if ( !fn.isEmpty() )
load( fn );
else
statusBar()->message( "Loading aborted", 2000 );
}
void ApplicationWindow::load( const char *fileName )
{
QFile f( fileName );
if ( !f.open( IO_ReadOnly ) )
return;
e->setAutoUpdate( FALSE );
e->clear();
QTextStream t(&f);
while ( !t.eof() ) {
QString s = t.readLine();
e->append( s );
}
f.close();
e->setAutoUpdate( TRUE );
e->repaint();
setCaption( fileName );
QString s;
s.sprintf( "Loaded document %s", fileName );
statusBar()->message( s, 2000 );
}
void ApplicationWindow::save()
{
statusBar()->message( "File->Save is not implemented" );
QMessageBox::message( "Note", "Left as an exercise for the user." );
}
void ApplicationWindow::print()
{
const int MARGIN = 10;
int pageNo = 1;
if ( printer->setup(this) ) { // printer dialog
statusBar()->message( "Printing..." );
QPainter p;
p.begin( printer ); // paint on printer
p.setFont( e->font() );
int yPos = 0; // y position for each line
QFontMetrics fm = p.fontMetrics();
QPaintDeviceMetrics metrics( printer ); // need width/height
// of printer surface
for( int i = 0 ; i < e->numLines() ; i++ ) {
if ( MARGIN + yPos > metrics.height() - MARGIN ) {
QString msg;
msg.sprintf( "Printing (page %d)...", ++pageNo );
statusBar()->message( msg );
printer->newPage(); // no more room on this page
yPos = 0; // back to top of page
}
p.drawText( MARGIN, MARGIN + yPos,
metrics.width(), fm.lineSpacing(),
ExpandTabs | DontClip,
e->textLine( i ) );
yPos = yPos + fm.lineSpacing();
}
p.end(); // send job to printer
statusBar()->message( "Printing completed", 2000 );
} else {
statusBar()->message( "Printing aborted", 2000 );
}
}
void ApplicationWindow::closeDoc()
{
close( TRUE ); // close AND DELETE!
}
void ApplicationWindow::toggleMenuBar()
{
if ( menuBar()->isVisible() ) {
menuBar()->hide();
controls->setItemChecked( mb, FALSE );
} else {
menuBar()->show();
controls->setItemChecked( mb, TRUE );
}
}
void ApplicationWindow::toggleToolBar()
{
if ( fileTools->isVisible() ) {
fileTools->hide();
controls->setItemChecked( tb, FALSE );
} else {
fileTools->show();
controls->setItemChecked( tb, TRUE );
}
}
void ApplicationWindow::toggleStatusBar()
{
if ( statusBar()->isVisible() ) {
statusBar()->hide();
controls->setItemChecked( sb, FALSE );
} else {
statusBar()->show();
controls->setItemChecked( sb, TRUE );
}
}
| Copyright © 1999 Troll Tech | Trademarks | Qt version 1.45
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