command.cpp

Trolltech公司发布的基于C++图形开发环境

void DeleteCommand::unexecute()
{
    formWindow()->setPropertyShowingBlocked( TRUE );
    formWindow()->clearSelection( FALSE );
    for ( QWidget *w = widgets.first(); w; w = widgets.next() ) {
	w->show();
	QString s = w->name();
	s.remove( 0, QString( "qt_dead_widget_" ).length() );
	w->setName( s );
	formWindow()->widgets()->insert( w, w );
	formWindow()->selectWidget( w );
	QValueList<MetaDataBase::Connection> conns = *connections.find( w );
	QValueList<MetaDataBase::Connection>::Iterator it = conns.begin();
	for ( ; it != conns.end(); ++it ) {
	    MetaDataBase::addConnection( formWindow(), (*it).sender,
					 (*it).signal, (*it).receiver, (*it).slot );
	}
    }
    formWindow()->setPropertyShowingBlocked( FALSE );
    formWindow()->emitShowProperties();
    formWindow()->mainWindow()->objectHierarchy()->widgetsInserted( widgets );
}

// ------------------------------------------------------------

SetPropertyCommand::SetPropertyCommand( const QString &n, FormWindow *fw,
					QObject *w, PropertyEditor *e,
					const QString &pn, const QVariant &ov,
					const QVariant &nv, const QString &ncut,
					const QString &ocut, bool reset )
    : Command( n, fw ), widget( w ), editor( e ), propName( pn ),
      oldValue( ov ), newValue( nv ), oldCurrentItemText( ocut ), newCurrentItemText( ncut ),
      wasChanged( TRUE ), isResetCommand( reset )
{
    wasChanged = MetaDataBase::isPropertyChanged( w, propName );
    if ( oldCurrentItemText.isNull() )
	oldCurrentItemText = "";
    if ( newCurrentItemText.isNull() )
	newCurrentItemText = "";
}


void SetPropertyCommand::execute()
{
    if ( !wasChanged )
	MetaDataBase::setPropertyChanged( widget, propName, TRUE );
    if ( isResetCommand ) {
	MetaDataBase::setPropertyChanged( widget, propName, FALSE );
	if ( WidgetFactory::resetProperty( widget, propName ) ) {
	    if ( !formWindow()->isWidgetSelected( widget ) && formWindow() != (QObject *)widget )
		formWindow()->selectWidget( (QObject *)widget );
	    if ( editor->widget() != widget )
		editor->setWidget( widget, formWindow() );
	    editor->propertyList()->setCurrentProperty( propName );
	    PropertyItem *i = (PropertyItem*)editor->propertyList()->currentItem();
	    if ( !i )
		return;
	    i->setValue( widget->property( propName ) );
	    i->setChanged( FALSE );
	    editor->refetchData();
	    editor->emitWidgetChanged();
	    return;
	}
    }
    setProperty( newValue, newCurrentItemText );
}

void SetPropertyCommand::unexecute()
{
    if ( !wasChanged )
	MetaDataBase::setPropertyChanged( widget, propName, FALSE );
    if ( isResetCommand )
	MetaDataBase::setPropertyChanged( widget, propName, TRUE );
    setProperty( oldValue, oldCurrentItemText );
}

bool SetPropertyCommand::canMerge( Command *c )
{
    SetPropertyCommand *cmd = (SetPropertyCommand*)c;
    if ( !widget )
	return FALSE;
    const QMetaProperty *p =
	widget->metaObject()->property( widget->metaObject()->findProperty( propName, TRUE ), TRUE );
    if ( !p ) {
	if ( propName == "toolTip" || propName == "whatsThis" )
	    return TRUE;
	if ( ::qt_cast<CustomWidget*>((QObject *)widget) ) {
	    MetaDataBase::CustomWidget *cw = ((CustomWidget*)(QObject*)widget)->customWidget();
	    if ( !cw )
		return FALSE;
	    for ( QValueList<MetaDataBase::Property>::Iterator it = cw->lstProperties.begin(); it != cw->lstProperties.end(); ++it ) {
		if ( QString( (*it ).property ) == propName ) {
		    if ( (*it).type == "String" || (*it).type == "CString" || (*it).type == "Int" || (*it).type == "UInt" )
			return TRUE;
		}
	    }
	}
	return FALSE;
    }
    QVariant::Type t = QVariant::nameToType( p->type() );
    return ( cmd->propName == propName &&
	     t == QVariant::String || t == QVariant::CString || t == QVariant::Int || t == QVariant::UInt );
}

void SetPropertyCommand::merge( Command *c )
{
    SetPropertyCommand *cmd = (SetPropertyCommand*)c;
    newValue = cmd->newValue;
    newCurrentItemText = cmd->newCurrentItemText;
}

bool SetPropertyCommand::checkProperty()
{
    if ( propName == "name" /*|| propName == "itemName"*/ ) { // ### fix that
	QString s = newValue.toString();
	if ( !formWindow()->unify( widget, s, FALSE ) ) {
	    QMessageBox::information( formWindow()->mainWindow(),
				      FormWindow::tr( "Set 'name' property" ),
				      FormWindow::tr( "The name of a widget must be unique.\n"
						      "'%1' is already used in form '%2',\n"
						      "so the name has been reverted to '%3'." ).
				      arg( newValue.toString() ).
				      arg( formWindow()->name() ).
				      arg( oldValue.toString() ));
	    setProperty( oldValue, oldCurrentItemText, FALSE );
	    return FALSE;
	}
	if ( s.isEmpty() ) {
	    QMessageBox::information( formWindow()->mainWindow(),
				      FormWindow::tr( "Set 'name' property" ),
				      FormWindow::tr( "The name of a widget must not be null.\n"
						      "The name has been reverted to '%1'." ).
				      arg( oldValue.toString() ));
	    setProperty( oldValue, oldCurrentItemText, FALSE );
	    return FALSE;
	}

	if ( ::qt_cast<FormWindow*>(widget->parent()) )
	    formWindow()->mainWindow()->formNameChanged( (FormWindow*)((QWidget*)(QObject*)widget)->parentWidget() );
    }
    return TRUE;
}

void SetPropertyCommand::setProperty( const QVariant &v, const QString &currentItemText, bool select )
{
    if ( !widget )
        return;

    if ( !formWindow()->isWidgetSelected( widget ) && !formWindow()->isMainContainer( widget ) && select )
	formWindow()->selectWidget( widget );
    if ( editor->widget() != widget && select )
	editor->setWidget( widget, formWindow() );
    if ( select )
	editor->propertyList()->setCurrentProperty( propName );
    const QMetaProperty *p =
	widget->metaObject()->property( widget->metaObject()->findProperty( propName, TRUE ), TRUE );
    if ( !p ) {
	if ( propName == "hAlign" ) {
	    p = widget->metaObject()->property( widget->metaObject()->findProperty( "alignment", TRUE ), TRUE );
	    int align = widget->property( "alignment" ).toInt();
	    align &= ~( AlignHorizontal_Mask );
	    align |= p->keyToValue( currentItemText );
	    widget->setProperty( "alignment", QVariant( align ) );
	} else if ( propName == "vAlign" ) {
	    p = widget->metaObject()->property( widget->metaObject()->findProperty( "alignment", TRUE ), TRUE );
	    int align = widget->property( "alignment" ).toInt();
	    align &= ~( AlignVertical_Mask );
	    align |= p->keyToValue( currentItemText );
	    widget->setProperty( "alignment", QVariant( align ) );
	} else if ( propName == "wordwrap" ) {
	    int align = widget->property( "alignment" ).toInt();
	    align &= ~WordBreak;
	    if ( v.toBool() )
		align |= WordBreak;
	    widget->setProperty( "alignment", QVariant( align ) );
	} else if ( propName == "layoutSpacing" ) {
	    QVariant val = v;
	    if ( val.toString() == "default" )
		val = -1;
	    MetaDataBase::setSpacing( WidgetFactory::containerOfWidget( (QWidget*)editor->widget() ), val.toInt() );
	} else if ( propName == "layoutMargin" ) {
	    QVariant val = v;
	    if ( val.toString() == "default" )
		val = -1;
	    MetaDataBase::setMargin( WidgetFactory::containerOfWidget( (QWidget*)editor->widget() ), val.toInt() );
	} else if ( propName == "resizeMode" ) {
	    MetaDataBase::setResizeMode( WidgetFactory::containerOfWidget( (QWidget*)editor->widget() ), currentItemText );
	} else if ( propName == "toolTip" || propName == "whatsThis" || propName == "database" || propName == "frameworkCode" ) {
	    MetaDataBase::setFakeProperty( editor->widget(), propName, v );
	} else if ( ::qt_cast<CustomWidget*>(editor->widget()) ) {
	    MetaDataBase::CustomWidget *cw = ((CustomWidget *)(QObject *)widget)->customWidget();
	    if ( cw ) {
		MetaDataBase::setFakeProperty( editor->widget(), propName, v );
	    }
	}
	editor->refetchData();
	editor->emitWidgetChanged();
	( ( PropertyItem* )editor->propertyList()->currentItem() )->setChanged( MetaDataBase::isPropertyChanged( widget, propName ) );
#ifndef QT_NO_SQL
	if ( propName == "database" ) {
	    formWindow()->mainWindow()->objectHierarchy()->databasePropertyChanged( (QWidget*)((QObject *)widget), MetaDataBase::fakeProperty( widget, "database" ).toStringList() );
	}
#endif
	return;
    }

    if ( p->isSetType() ) {
	QStrList strlst;
	QStringList lst = QStringList::split( "|", currentItemText );
	QValueListConstIterator<QString> it = lst.begin();
	for ( ; it != lst.end(); ++it )
	    strlst.append( (*it).latin1() );
	widget->setProperty( propName, p->keysToValue( strlst ) );
    } else if ( p->isEnumType() ) {
	widget->setProperty( propName, p->keyToValue( currentItemText ) );
    } else if ( qstrcmp( p->name(), "buddy" ) == 0 ) {
	widget->setProperty( propName, currentItemText );
    } else {
	QVariant ov;
	if ( propName == "name" || propName == "itemName" )
	    ov = widget->property( propName );
	int oldSerNum = -1;
	if ( v.type() == QVariant::Pixmap )
	    oldSerNum = v.toPixmap().serialNumber();
	widget->setProperty( propName, v );
	if ( oldSerNum != -1 && oldSerNum != widget->property( propName ).toPixmap().serialNumber() )
	    MetaDataBase::setPixmapKey( formWindow(),
					widget->property( propName ).toPixmap().serialNumber(),
					MetaDataBase::pixmapKey( formWindow(), oldSerNum ) );
	if ( propName == "cursor" ) {
	    MetaDataBase::setCursor( (QWidget*)((QObject *)widget), v.toCursor() );
	}
	if ( propName == "name" && widget->isWidgetType() ) {
	    formWindow()->mainWindow()->objectHierarchy()->namePropertyChanged( ((QWidget*)(QObject *)widget), ov );
	    if ( formWindow()->isMainContainer( widget ) )
		formWindow()->setName( v.toCString() );
	}
	if ( propName == "name" && ::qt_cast<QAction*>((QObject *)widget) && ::qt_cast<QMainWindow*>(formWindow()->mainContainer()) ) {
	    formWindow()->mainWindow()->actioneditor()->updateActionName( (QAction*)(QObject *)widget );
	}
	if ( propName == "iconSet" && ::qt_cast<QAction*>((QObject *)widget) && ::qt_cast<QMainWindow*>(formWindow()->mainContainer()) ) {
	    formWindow()->mainWindow()->actioneditor()->updateActionIcon( (QAction*)(QObject *)widget );
	}
	if ( propName == "caption" ) {
	    if ( formWindow()->isMainContainer( widget ) )
		formWindow()->setCaption( v.toString() );
	}
	if ( propName == "icon" ) {
	    if ( formWindow()->isMainContainer( widget ) )
		formWindow()->setIcon( v.toPixmap() );
	}
    }
    editor->refetchData();
    if ( editor->propertyList()->currentItem() && select ) {
	( ( PropertyItem* )editor->propertyList()->currentItem() )->showEditor();
	( ( PropertyItem* )editor->propertyList()->currentItem() )->setChanged( MetaDataBase::isPropertyChanged( widget, propName ) );
    }
    editor->emitWidgetChanged();
    formWindow()->killAccels( widget );
}

// ------------------------------------------------------------

LayoutHorizontalCommand::LayoutHorizontalCommand( const QString &n, FormWindow *fw,
						  QWidget *parent, QWidget *layoutBase,
						  const QWidgetList &wl )
    : Command( n, fw ), layout( wl, parent, fw, layoutBase )
{
}

void LayoutHorizontalCommand::execute()
{
    formWindow()->clearSelection( FALSE );
    layout.doLayout();
    formWindow()->mainWindow()->objectHierarchy()->rebuild();
}

void LayoutHorizontalCommand::unexecute()
{
    formWindow()->clearSelection( FALSE );
    layout.undoLayout();
    formWindow()->mainWindow()->objectHierarchy()->rebuild();
}

// ------------------------------------------------------------

LayoutHorizontalSplitCommand::LayoutHorizontalSplitCommand( const QString &n, FormWindow *fw,
							    QWidget *parent, QWidget *layoutBase,
							    const QWidgetList &wl )
    : Command( n, fw ), layout( wl, parent, fw, layoutBase, TRUE, TRUE )
{
}

void LayoutHorizontalSplitCommand::execute()
{
    formWindow()->clearSelection( FALSE );
    layout.doLayout();
    formWindow()->mainWindow()->objectHierarchy()->rebuild();
}

void LayoutHorizontalSplitCommand::unexecute()
{
    formWindow()->clearSelection( FALSE );
    layout.undoLayout();
    formWindow()->mainWindow()->objectHierarchy()->rebuild();
}

// ------------------------------------------------------------

LayoutVerticalCommand::LayoutVerticalCommand( const QString &n, FormWindow *fw,
					      QWidget *parent, QWidget *layoutBase,
					      const QWidgetList &wl )
    : Command( n, fw ), layout( wl, parent, fw, layoutBase )
{
}

void LayoutVerticalCommand::execute()
{
    formWindow()->clearSelection( FALSE );
    layout.doLayout();
    formWindow()->mainWindow()->objectHierarchy()->rebuild();
}

void LayoutVerticalCommand::unexecute()
{
    formWindow()->clearSelection( FALSE );
    layout.undoLayout();
    formWindow()->mainWindow()->objectHierarchy()->rebuild();
}

// ------------------------------------------------------------

LayoutVerticalSplitCommand::LayoutVerticalSplitCommand( const QString &n, FormWindow *fw,
							QWidget *parent, QWidget *layoutBase,
							const QWidgetList &wl )
    : Command( n, fw ), layout( wl, parent, fw, layoutBase, TRUE, TRUE )
{
}

void LayoutVerticalSplitCommand::execute()
{
    formWindow()->clearSelection( FALSE );
    layout.doLayout();
    formWindow()->mainWindow()->objectHierarchy()->rebuild();
}

void LayoutVerticalSplitCommand::unexecute()
{
    formWindow()->clearSelection( FALSE );
    layout.undoLayout();
    formWindow()->mainWindow()->objectHierarchy()->rebuild();
}

// ------------------------------------------------------------

LayoutGridCommand::LayoutGridCommand( const QString &n, FormWindow *fw,
				      QWidget *parent, QWidget *layoutBase,
				      const QWidgetList &wl, int xres, int yres )
    : Command( n, fw ), layout( wl, parent, fw, layoutBase, QSize( QMAX(5,xres), QMAX(5,yres) ) )
{
}

void LayoutGridCommand::execute()
{
    formWindow()->clearSelection( FALSE );
    layout.doLayout();
    formWindow()->mainWindow()->objectHierarchy()->rebuild();
}

void LayoutGridCommand::unexecute()
{
    formWindow()->clearSelection( FALSE );
    layout.undoLayout();
    formWindow()->mainWindow()->objectHierarchy()->rebuild();
}

// ------------------------------------------------------------

BreakLayoutCommand::BreakLayoutCommand( const QString &n, FormWindow *fw,
					QWidget *layoutBase, const QWidgetList &wl )
    : Command( n, fw ), lb( layoutBase ), widgets( wl )
{
    WidgetFactory::LayoutType lay = WidgetFactory::layoutType( layoutBase );
    spacing = MetaDataBase::spacing( layoutBase );
    margin = MetaDataBase::margin( layoutBase );
    layout = 0;
    if ( lay == WidgetFactory::HBox )
	layout = new HorizontalLayout( wl, layoutBase, fw, layoutBase, FALSE, ::qt_cast<QSplitter*>(layoutBase) != 0 );
    else if ( lay == WidgetFactory::VBox )
	layout = new VerticalLayout( wl, layoutBase, fw, layoutBase, FALSE, ::qt_cast<QSplitter*>(layoutBase) != 0 );
    else if ( lay == WidgetFactory::Grid )
	layout = new GridLayout( wl, layoutBase, fw, layoutBase, QSize( QMAX( 5, fw->grid().x()), QMAX( 5, fw->grid().y()) ), FALSE );
}

void BreakLayoutCommand::execute()
{
    if ( !layout )
	return;
    formWindow()->clearSelection( FALSE );
    layout->breakLayout();
    formWindow()->mainWindow()->objectHierarchy()->rebuild();
    for ( QWidget *w = widgets.first(); w; w = widgets.next() )
	w->resize( QMAX( 16, w->width() ), QMAX( 16, w->height() ) );
}

void BreakLayoutCommand::unexecute()