formwindow.cpp

Trolltech公司发布的基于C++图形开发环境

#if defined(_WS_WIN32_)
    QObjectList *l = queryList( "QWidget" );
    for ( QObject *o = l->first(); o; o = l->next() ) {
	flickerfree_update( (QWidget*)o );
    }
    flickerfree_update( this );
    delete l;
#endif
}

QPtrDict<QWidget> *FormWindow::widgets()
{
    return &insertedWidgets;
}

QWidget *FormWindow::designerWidget( QObject *o ) const
{
    if ( !o || !o->isWidgetType() )
	return 0;
    QWidget *w = (QWidget*)o;
    while ( w && !isMainContainer( w ) && !insertedWidgets[ (void*)w ] )
	w = (QWidget*)w->parent();
    return w;
}

void FormWindow::emitShowProperties( QWidget *w )
{
    if ( w ) {
	QWidget *opw = propertyWidget;
	propertyWidget = w;
	repaintSelection( opw );
    }
    showPropertiesTimer->stop();
    showPropertiesTimer->start( 0, TRUE );
}

void FormWindow::emitUpdateProperties( QWidget *w )
{
    if ( w == propertyWidget ) {
	updatePropertiesTimer->stop();
	updatePropertiesTimer->start( 0, TRUE );
    }
}

void FormWindow::emitSelectionChanged()
{
    selectionChangedTimer->stop();
    selectionChangedTimer->start( 0, TRUE );
}

void FormWindow::updatePropertiesTimerDone()
{
    if ( propertyWidget )
	emit updateProperties( propertyWidget );
}

void FormWindow::showPropertiesTimerDone()
{
    if ( propertyWidget )
	emit showProperties( propertyWidget );
}

void FormWindow::selectionChangedTimerDone()
{
    emit selectionChanged();
}

void FormWindow::currentToolChanged()
{
    toolFixed = FALSE;
    int t = mainwindow->currentTool();
    if ( currTool == t )
	return;

    // tool cleanup
    switch ( currTool ) {
    case ORDER_TOOL:
	hideOrderIndicators();
	break;
    case CONNECT_TOOL:
	restoreConnectionLine();
	if ( connectSender )
	    restoreRect( QRect( mapToForm(  ( (QWidget*)connectSender )->parentWidget(),
					    ( (QWidget*)connectSender )->pos() ),
				( (QWidget*)connectSender )->size() ) );
	if ( connectReceiver )
	    restoreRect( QRect( mapToForm( ( (QWidget*)connectReceiver )->parentWidget(),
					   ( (QWidget*)connectReceiver )->pos() ),
				( (QWidget*)connectReceiver )->size() ) );
	endUnclippedPainter();
	break;
    case POINTER_TOOL:
	break;
    default:
	if ( insertParent )
	    endRectDraw();
	break;
    }

    connectSender = connectReceiver = 0;
    widgetPressed = FALSE;
    drawRubber = FALSE;
    insertParent = 0;
    delete buffer;
    buffer = 0;

    currTool = t;

    if ( hasFocus() )
	clearSelection( FALSE );

    mainWindow()->statusBar()->clear();

    // tool setup
    switch ( currTool ) {
    case POINTER_TOOL:
	if ( propertyWidget && !isMainContainer( propertyWidget ) && !isWidgetSelected( propertyWidget ) )
	    emitShowProperties( mainContainer() );
	restoreCursors( this, this );
	break;
    case ORDER_TOOL:
	mainWindow()->statusBar()->message( tr( "Click widgets to change tab order...") );
	orderedWidgets.clear();
	showOrderIndicators();
	if ( mainWindow()->formWindow() == this )
	    emitShowProperties( mainContainer() );
	setCursorToAll( ArrowCursor, this );
	break;
    case CONNECT_TOOL:
	mainWindow()->statusBar()->message( tr( "Drag a line to create a connection...") );
	setCursorToAll( CrossCursor, this );
	if ( mainWindow()->formWindow() == this )
	    emitShowProperties( mainContainer() );
	break;
    default:
	mainWindow()->statusBar()->message( tr( "Click on the form to insert a %1..." ).arg( WidgetDatabase::toolTip( currTool ).lower() ) );
	setCursorToAll( CrossCursor, this );
	if ( mainWindow()->formWindow() == this )
	    emitShowProperties( mainContainer() );
	break;
    }
}

void FormWindow::showOrderIndicators()
{
    hideOrderIndicators();
    orderIndicators.setAutoDelete( TRUE );
    QObjectList *l = mainContainer()->queryList( "QWidget" );
    stackedWidgets = MetaDataBase::tabOrder( this );
    if ( l ) {
	int order = 1;
	for ( QObject *o = l->first(); o; o = l->next() ) {
	    QWidget* w = (QWidget*) o;
	    if ( w->isVisibleTo( w->parentWidget() ) &&
		 insertedWidgets[ (void*)w ]  &&
		 w->focusPolicy() != NoFocus ) {
		OrderIndicator* ind = new OrderIndicator( order++, w, this );
		orderIndicators.append( ind );
		if ( stackedWidgets.findRef( w ) == -1 )
		    stackedWidgets.append( w );
	    }
	}
    	delete l;
    }
    updateOrderIndicators();
}

void FormWindow::hideOrderIndicators()
{
    orderIndicators.clear();
}

void FormWindow::updateOrderIndicators()
{
    int order = 1;
    for ( QWidget *w = stackedWidgets.first(); w; w = stackedWidgets.next() ) {
	for ( OrderIndicator* i = orderIndicators.first(); i; i = orderIndicators.next() )
	    i->setOrder( order, w );
	order++;
    }
}

void FormWindow::repositionOrderIndicators()
{
    for ( OrderIndicator* i = orderIndicators.first(); i; i = orderIndicators.next() )
	i->reposition();
}


void FormWindow::updateUndoInfo()
{
    commandHistory()->emitUndoRedo();
}

MainWindow *FormWindow::mainWindow() const
{
    return mainwindow;
}

void FormWindow::save( const QString &filename )
{
    mainWindow()->statusBar()->message( tr( "Saving file %1..." ).arg(filename) );
    QStringList missingCustomWidgets;
    QPtrDictIterator<QWidget> it( insertedWidgets );
    for ( ; it.current(); ++it ) {
	if ( it.current()->isA( "CustomWidget" ) ) {
	    QString className = WidgetFactory::classNameOf( it.current() );
	    if ( !MetaDataBase::hasCustomWidget( className ) )
		missingCustomWidgets << className;
	}
    }

    if ( !missingCustomWidgets.isEmpty() ) {
	QString txt = tr( "Following custom widgets are used in '%1',\n"
			  "but they are not known to the designer:" ).arg( name() );
	for ( QStringList::Iterator sit = missingCustomWidgets.begin(); sit != missingCustomWidgets.end(); ++sit )
	    txt += "   " + *sit + "\n";
	txt += "If you save this form and generate code for it by the UIC, \n"
	       "the generated code will not compile. Do you really want to save\n"
	       "this form now?";
	if ( QMessageBox::information( mainWindow(), tr( "Save Form" ), txt ) == 1 )
	    return;
    }

    fname = filename;
    Resource resource( mainWindow() );
    resource.setWidget( this );
    if ( !resource.save( fname ) ) {
	mainWindow()->statusBar()->message( tr( "Failed to save file %1.").arg( filename ), 5000 );
	QMessageBox::warning( mainWindow(), tr( "Save" ), tr( "Couldn't save file %1" ).arg( fname ) );
    } else {
	mainWindow()->statusBar()->message( tr( "%1 saved.").arg( filename ), 3000 );
	commandHistory()->setModified( FALSE );
    }
}

void FormWindow::setPropertyShowingBlocked( bool b )
{
    propShowBlocked = b;
}

bool FormWindow::isPropertyShowingBlocked() const
{
    return propShowBlocked;
}

int FormWindow::numSelectedWidgets() const
{
    return usedSelections.count();
}

QString FormWindow::copy()
{
    Resource resource( mainWindow() );
    resource.setWidget( this );
    return resource.copy();
}

void FormWindow::lowerWidgets()
{
    QWidgetList widgets;
    QPtrDictIterator<WidgetSelection> it( usedSelections );
    for ( ; it.current(); ++it )
	widgets.append( it.current()->widget() );

    LowerCommand *cmd = new LowerCommand( tr( "Lower" ), this, widgets );
    cmd->execute();
    commandHistory()->addCommand( cmd );					
}

static void find_accel( const QString &txt, QMap<QChar, QWidgetList > &accels, QWidget *w )
{
    int i = txt.find( "&" );
    if ( i == -1 )
	return;
    QChar c = txt[ i + 1 ];
    if ( c.isNull() || c == '&' )
	return;
    c = c.lower();
    QMap<QChar, QWidgetList >::Iterator it = accels.find( c );
    if ( it == accels.end() ) {
	QWidgetList wl;
	wl.append( w );
	accels.insert( c, wl );
    } else {
	QWidgetList *wl = &*it;;
	wl->append( w );
    }
}

void FormWindow::checkAccels()
{
    QMap<QChar, QWidgetList > accels;
    QObjectList *l = mainContainer()->queryList( "QWidget" );
    if ( l ) {
	for ( QObject *o = l->first(); o; o = l->next() ) {
	    if ( ( (QWidget*)o )->isVisibleTo( this ) &&
		 insertedWidgets[ (void*)o ] ) {
		QWidget *w = (QWidget*)o;
		const QMetaProperty* text = w->metaObject()->property( "text", TRUE );
		const QMetaProperty* title = w->metaObject()->property( "title", TRUE );
		const QMetaProperty* pageTitle = w->metaObject()->property( "pageTitle", TRUE );
		if ( text )
		    find_accel( w->property( "text" ).toString(), accels, w );
		if ( title )
		    find_accel( w->property( "title" ).toString(), accels, w );
		if ( pageTitle )
		    find_accel( w->property( "pageTitle" ).toString(), accels, w );
	    }
	}
    }
    delete l;

    bool ok = TRUE;
    QWidget *wid;
    for ( QMap<QChar, QWidgetList >::Iterator it = accels.begin(); it != accels.end(); ++it ) {
	if ( (*it).count() > 1 ) {
	    ok = FALSE;
	    switch ( QMessageBox::information( mainWindow(), tr( "Check Accelerators" ),
					       tr( "The accelerator '%1' is used %2 times. What do you "
						   "want to do?" ).arg( it.key() ).arg( (*it).count() ),
					       tr( "&Select widgets using it" ),
					       tr( "&Ignore" ),
					       tr( "&Cancel" ), 0, 2 ) ) {
	    case 0: // select
		clearSelection( FALSE );
		for ( wid = (*it).first(); wid; wid = (*it).next() )
		    selectWidget( wid, TRUE );
		return;
	    case 1: // ignore
		break;
	    case 2: // cancel
		return;
	    }
	}
    }

    if ( ok )
	QMessageBox::information( mainWindow(), tr( "Check Accelerators" ),
				  tr( "No accelerator is used more that once!" ) );
}

void FormWindow::raiseWidgets()
{
    QWidgetList widgets;
    QPtrDictIterator<WidgetSelection> it( usedSelections );
    for ( ; it.current(); ++it )
	widgets.append( it.current()->widget() );

    RaiseCommand *cmd = new RaiseCommand( tr( "Raise" ), this, widgets );
    cmd->execute();
    commandHistory()->addCommand( cmd );					
}

void FormWindow::paste( const QString &cb, QWidget *parent )
{
    Resource resource( mainWindow() );
    resource.setWidget( this );
    resource.paste( cb, parent );
}

void FormWindow::selectAll()
{
    checkedSelectionsForMove = FALSE;
    blockSignals( TRUE );
    QObjectList *l = mainContainer()->queryList( "QWidget" );
    if ( l ) {
	for ( QObject *o = l->first(); o; o = l->next() ) {
	    if ( ( (QWidget*)o )->isVisibleTo( this ) &&
		 insertedWidgets[ (void*)o ] ) {
		selectWidget( (QWidget*)o );
	    }
	}
    }
    delete l;
    blockSignals( FALSE );
    emitSelectionChanged();
    if ( propertyWidget )
	emitShowProperties( propertyWidget );
    emitSelectionChanged();
}

void FormWindow::layoutHorizontal()
{
    QWidgetList widgets( selectedWidgets() );
    LayoutHorizontalCommand *cmd = new LayoutHorizontalCommand( tr( "Layout horizontally" ),
								this, mainContainer(), 0, widgets );
    clearSelection( FALSE );
    commandHistory()->addCommand( cmd );
    cmd->execute();
}

void FormWindow::layoutVertical()
{
    QWidgetList widgets( selectedWidgets() );
    LayoutVerticalCommand *cmd = new LayoutVerticalCommand( tr( "Layout vertically" ),
							    this, mainContainer(), 0, widgets );
    clearSelection( FALSE );
    commandHistory()->addCommand( cmd );
    cmd->execute();
}

void FormWindow::layoutGrid()
{
    int xres = grid().x();
    int yres = grid().y();

    QWidgetList widgets( selectedWidgets() );
    LayoutGridCommand *cmd = new LayoutGridCommand( tr( "Layout in a grid" ),
						    this, mainContainer(), 0, widgets, xres, yres );
    clearSelection( FALSE );
    commandHistory()->addCommand( cmd );
    cmd->execute();
}

void FormWindow::layoutHorizontalContainer( QWidget *w )
{
    if ( w == this )
	w = mainContainer();
    QObjectList *l = (QObjectList*)WidgetFactory::containerOfWidget(w)->children();
    if ( !l )
	return;
    QWidgetList widgets;
    for ( QObject *o = l->first(); o; o = l->next() ) {
	if ( o->isWidgetType() &&
	     ( (QWidget*)o )->isVisibleTo( this ) &&
	     insertedWidgets.find( (QWidget*)o ) )
	    widgets.append( (QWidget*)o );
    }
    LayoutHorizontalCommand *cmd = new LayoutHorizontalCommand( tr( "Layout children horizontally" ),
								this, mainContainer(), w, widgets );
    clearSelection( FALSE );
    commandHistory()->addCommand( cmd );
    cmd->execute();
}

void FormWindow::layoutVerticalContainer( QWidget *w )
{
    if ( w == this )