widgetfactory.cpp

Linux下的基于X11的图形开发环境。

	QWizard *wiz = new QDesignerWizard( parent, name );
#if defined(QT_NON_COMMERCIAL)
	if ( parent && !parent->inherits("MainWindow") )
#else
	if ( parent )
#endif
	    wiz->reparent( parent, QPoint( 0, 0 ), TRUE );
	if ( init && parent && parent->inherits( "FormWindow" ) ) {
	    QDesignerWidget *dw = new QDesignerWidget( (FormWindow*)parent, wiz, "page" );
	    MetaDataBase::addEntry( dw );
	    wiz->addPage( dw, FormWindow::tr( "Page" ) );
	    QTimer::singleShot( 0, wiz, SLOT( next() ) );
	}
	return wiz;
    } else if ( className == "Spacer" ) {
	Spacer *s = new Spacer( parent, name );
	MetaDataBase::addEntry( s );
	MetaDataBase::setPropertyChanged( s, "orientation", TRUE );
	MetaDataBase::setPropertyChanged( s, "sizeType", TRUE );
	if ( !r )
	    return s;
	if ( !r->isValid() || r->width() < 2 && r->height() < 2 )
	    s->setOrientation( orient );
	else if ( r->width() < r->height() )
	    s->setOrientation( Qt::Vertical );
	else
	    s->setOrientation( Qt::Horizontal );
	return s;
    } else if ( className == "QLCDNumber" )
	return new QLCDNumber( parent, name );
    else if ( className == "QProgressBar" )
	return new QProgressBar( parent, name );
    else if ( className == "QTextView" )
	return new QTextView( parent, name );
    else if ( className == "QTextBrowser" )
	return new QTextBrowser( parent, name );
    else if ( className == "QDial" )
	return new QDial( parent, name );
    else if ( className == "QSlider" ) {
	QSlider *s = new QSlider( parent, name );
	if ( !r )
	    return s;
	if ( !r->isValid() || r->width() < 2 && r->height() < 2 )
	    s->setOrientation( orient );
	else if ( r->width() > r->height() )
	    s->setOrientation( Qt::Horizontal );
	MetaDataBase::addEntry( s );
	MetaDataBase::setPropertyChanged( s, "orientation", TRUE );
	return s;
    } else if ( className == "QScrollBar" ) {
	QScrollBar *s = new QScrollBar( parent, name );
	if ( !r )
	    return s;
	if ( !r->isValid() || r->width() < 2 && r->height() < 2 )
	    s->setOrientation( orient );
	else if ( r->width() > r->height() )
	    s->setOrientation( Qt::Horizontal );
	MetaDataBase::addEntry( s );
	MetaDataBase::setPropertyChanged( s, "orientation", TRUE );
	return s;
    } else if ( className == "QFrame" ) {
	if ( !init )
	    return new QFrame( parent, name );
	QFrame *f = new QFrame( parent, name );
	f->setFrameStyle( QFrame::StyledPanel | QFrame::Raised );
	return f;
    } else if ( className == "Line" ) {
	Line *l = new Line( parent, name );
	MetaDataBase::addEntry( l );
	MetaDataBase::setPropertyChanged( l, "orientation", TRUE );
	MetaDataBase::setPropertyChanged( l, "frameShadow", TRUE );
	MetaDataBase::setPropertyChanged( l, "frameShape", TRUE );
	if ( !r )
	    return l;
	if ( !r->isValid() || r->width() < 2 && r->height() < 2 )
	    l->setOrientation( orient );
	else if ( r->width() < r->height() )
	    l->setOrientation( Qt::Vertical );
	return l;
    } else if ( className == "QMainWindow" ) {
	QMainWindow *mw = new QMainWindow( parent, name, 0 );
	mw->setDockEnabled( Qt::DockMinimized, FALSE );
	QDesignerWidget *dw = new QDesignerWidget( (FormWindow*)parent, mw, "central widget" );
	mw->setDockMenuEnabled( FALSE );
	MetaDataBase::addEntry( dw );
	mw->setCentralWidget( dw );
	(void)mw->statusBar();
	dw->show();
	return mw;
    }
#ifndef QT_NO_SQL
    else if ( className == "QDataBrowser" ) {
	QWidget *w = new QDesignerDataBrowser( parent, name );
	if ( parent )
	    w->reparent( parent, QPoint( 0, 0 ), TRUE );
	return w;
    } else if ( className == "QDataView" ) {
	QWidget *w = new QDesignerDataView( parent, name );
	if ( parent )
	    w->reparent( parent, QPoint( 0, 0 ), TRUE );
	return w;
    }
#endif

    WidgetInterface *iface = 0;
    widgetManager()->queryInterface( className, &iface );
    if ( !iface )
	return 0;

    QWidget *w = iface->create( className, parent, name );
#ifdef QT_CONTAINER_CUSTOM_WIDGETS
    if ( init && WidgetDatabase::isCustomPluginWidget( WidgetDatabase::idFromClassName( className ) ) ) {
	QWidgetContainerInterfacePrivate *iface2 = 0;
	iface->queryInterface( IID_QWidgetContainer, (QUnknownInterface**)&iface2 );
	if ( iface2 ) {
	    iface2->addPage( className, w, "Page", -1 );
	    iface2->release();
	}
    }
#endif
    iface->release();
    return w;
}



/*!  Find out which type the layout of the widget is. Returns \c HBox,
  \c VBox, \c Grid or \c NoLayout.  \a layout points to this
  QWidget::layout() of \a w or to 0 after the function call.
*/

WidgetFactory::LayoutType WidgetFactory::layoutType( QWidget *w, QLayout *&layout )
{
    layout = 0;

    if ( w && w->inherits( "QTabWidget" ) )
	w = ((QTabWidget*)w)->currentPage();
    if ( w && w->inherits( "QWizard" ) )
	w = ((QWizard*)w)->currentPage();
    if ( w && w->inherits( "QMainWindow" ) )
	w = ((QMainWindow*)w)->centralWidget();
    if ( w && w->inherits( "QWidgetStack" ) )
	w = ((QWidgetStack*)w)->visibleWidget();

    if ( w && w->inherits( "QSplitter" ) )
	return ( (QSplitter*)w )->orientation() == Horizontal ? HBox : VBox;

    if ( !w || !w->layout() )
	return NoLayout;
    QLayout *lay = w->layout();

    if ( w->inherits( "QGroupBox" ) ) {
	QObjectList *l = lay->queryList( "QLayout" );
	if ( l && l->first() )
	    lay = (QLayout*)l->first();
	delete l;
    }
    layout = lay;

    if ( lay->inherits( "QHBoxLayout" ) )
	return HBox;
    else if ( lay->inherits( "QVBoxLayout" ) )
	return VBox;
    else if ( lay->inherits( "QGridLayout" ) )
	return Grid;
    return NoLayout;
}

/*!
  \overload
*/
WidgetFactory::LayoutType WidgetFactory::layoutType( QLayout *layout )
{
    if ( layout->inherits( "QHBoxLayout" ) )
	return HBox;
    else if ( layout->inherits( "QVBoxLayout" ) )
	return VBox;
    else if ( layout->inherits( "QGridLayout" ) )
	return Grid;
    return NoLayout;
}

/*!
  \overload
*/
WidgetFactory::LayoutType WidgetFactory::layoutType( QWidget *w )
{
    QLayout *l = 0;
    return layoutType( w, l );
}


QWidget *WidgetFactory::layoutParent( QLayout *layout )
{
    QObject *o = layout;
    while ( o ) {
	if ( o->isWidgetType() )
	    return (QWidget*)o;
	o = o->parent();
    }
    return 0;
}

/*!  Returns the widget into which children should be inserted when \a
  w is a container known to the designer.

  Usually that is \a w itself, sometimes it is different (e.g. a
  tabwidget is known to the designer as a container but the child
  widgets should be inserted into the current page of the
  tabwidget. So in this case this function returns the current page of
  the tabwidget.)
 */
QWidget* WidgetFactory::containerOfWidget( QWidget *w )
{
    if ( !w )
	return w;
    if ( w->inherits( "QTabWidget" ) )
	return ((QTabWidget*)w)->currentPage();
    if ( w->inherits( "QWizard" ) )
	return ((QWizard*)w)->currentPage();
    if ( w->inherits( "QWidgetStack" ) )
	return ((QWidgetStack*)w)->visibleWidget();
    if ( w->inherits( "QMainWindow" ) )
	return ((QMainWindow*)w)->centralWidget();
#ifdef QT_CONTAINER_CUSTOM_WIDGETS
    if ( !WidgetDatabase::isCustomPluginWidget( WidgetDatabase::idFromClassName( classNameOf( w ) ) ) )
	return w;
    WidgetInterface *iface = 0;
    widgetManager()->queryInterface( classNameOf( w ), &iface );
    if ( !iface )
	return w;
    QWidgetContainerInterfacePrivate *iface2 = 0;
    iface->queryInterface( IID_QWidgetContainer, (QUnknownInterface**)&iface2 );
    if ( !iface2 )
	return w;
    QWidget *c = iface2->containerOfWidget( w->className(), w );
    iface2->release();
    iface->release();
    if ( c )
	return c;
#endif
    return w;
}

/*!  Returns the actual designer widget of the container \a w. This is
  normally \a w itself, but might be a parent or grand parent of \a w
  (e.g. when working with a tabwidget and \a w is the container which
  contains and layouts childs, but the actual widget known to the
  designer is the tabwidget which is the parent of \a w. So this
  function returns the tabwidget then.)
*/

QWidget* WidgetFactory::widgetOfContainer( QWidget *w )
{
    if ( w->parentWidget() && w->parentWidget()->inherits( "QWidgetStack" ) )
	w = w->parentWidget();
    while ( w ) {
	int id = WidgetDatabase::idFromClassName( WidgetFactory::classNameOf( w ) );
	if ( WidgetDatabase::isContainer( id ) ||
	     w && w->parentWidget() && w->parentWidget()->inherits( "FormWindow" ) )
	    return w;
	w = w->parentWidget();
    }
    return w;
}

/*!
  Returns whether \a o is a passive interactor or not.
 */

bool WidgetFactory::lastWasAPassiveInteractor = FALSE;
QGuardedPtr<QObject> *WidgetFactory::lastPassiveInteractor = new QGuardedPtr<QObject>();

bool WidgetFactory::isPassiveInteractor( QObject* o )
{
    if ( lastPassiveInteractor && *lastPassiveInteractor && (QObject*)(*lastPassiveInteractor) == o )
	return lastWasAPassiveInteractor;
    lastWasAPassiveInteractor = FALSE;
    (*lastPassiveInteractor) = o;
    if ( QApplication::activePopupWidget() ) // if a popup is open, we have to make sure that this one is closed, else X might do funny things
	return ( lastWasAPassiveInteractor = TRUE );

    if ( o->inherits( "QTabBar" ) )
	return ( lastWasAPassiveInteractor = TRUE );
    else if ( o->inherits( "QSizeGrip" ) )
	return ( lastWasAPassiveInteractor = TRUE );
    else if ( o->inherits( "QToolButton" ) && o->parent() && o->parent()->inherits( "QTabBar" ) )
	return ( lastWasAPassiveInteractor = TRUE );
    else if ( o->parent() && o->parent()->inherits( "QWizard" ) && o->inherits( "QPushButton" ) )
	return ( lastWasAPassiveInteractor = TRUE );
    else if ( o->parent() && o->parent()->inherits( "QMainWindow" ) && o->inherits( "QMenuBar" ) )
	return ( lastWasAPassiveInteractor = TRUE );
    else if ( o->inherits( "QDockWindowHandle" ) )
	return ( lastWasAPassiveInteractor = TRUE );
    else if ( o->inherits( "QHideDock" ) )
	return ( lastWasAPassiveInteractor = TRUE );
    else if ( qstrcmp( o->name(), "designer_wizardstack_button" ) == 0 )
	return ( lastWasAPassiveInteractor = TRUE );

#ifdef QT_CONTAINER_CUSTOM_WIDGETS
    if ( !o->isWidgetType() )
	return ( lastWasAPassiveInteractor = FALSE );
    WidgetInterface *iface = 0;
    QWidget *w = (QWidget*)o;
    while ( !iface && w && !w->inherits( "FormWindow" ) ) {
	widgetManager()->queryInterface( classNameOf( w ), &iface );
	w = w->parentWidget();
    }
    if ( !iface )
	return ( lastWasAPassiveInteractor = FALSE );
    QWidgetContainerInterfacePrivate *iface2 = 0;
    iface->queryInterface( IID_QWidgetContainer, (QUnknownInterface**)&iface2 );
    if ( !iface2 )
	return ( lastWasAPassiveInteractor = FALSE );
    QWidget *fw = MainWindow::self->isAFormWindowChild( (QWidget*)o );
    if ( !fw )
	return ( lastWasAPassiveInteractor = FALSE );
    QWidget *dw = ( (FormWindow*)fw )->designerWidget( (QWidget*)o );
    if ( !dw )
	return ( lastWasAPassiveInteractor = FALSE );
    lastWasAPassiveInteractor = iface2->isPassiveInteractor( dw->className(), (QWidget*)o );
    iface2->release();
    iface->release();
#endif
    return lastWasAPassiveInteractor;
}


/*!
  Returns the class name of object \a o that should be used for externally (i.e. for saving)
 */
const char* WidgetFactory::classNameOf( QObject* o )
{
    if ( o->inherits( "QDesignerTabWidget" ) )
	return "QTabWidget";
    else if ( o->inherits( "QDesignerWidgetStack" ) )
	return "QWidgetStack";
    else if ( o->inherits( "QWidgetStack" ) )
	return "QWeDoNotWantToBreakTabWidget";
    else if ( o->inherits( "QDesignerDialog" ) )
	return "QDialog";
    else if ( o->inherits( "QDesignerWidget" ) )
	return "QWidget";
    else if ( o->inherits( "CustomWidget" ) )
	return ( (CustomWidget*)o )->realClassName().latin1();
    else if ( o->inherits( "QDesignerLabel" ) )
	return "QLabel";
    else if ( o->inherits( "QDesignerWizard" ) )
	return "QWizard";
    else if ( o->inherits( "QDesignerPushButton" ) )
	return "QPushButton";
    else if ( o->inherits( "QDesignerToolButton" ) )
	return "QToolButton";
    else if ( o->inherits( "QDesignerRadioButton" ) )
	return "QRadioButton";
    else if ( o->inherits( "QDesignerCheckBox" ) )
	return "QCheckBox";
    else if ( o->inherits( "QDesignerMenuBar" ) )
	return "QMenuBar";
    else if ( o->inherits( "QDesignerToolBar" ) )
	return "QToolBar";
    else if ( o->inherits( "QDesignerAction" ) )
	return "QAction";
    else if ( o->inherits( "QDesignerActionGroup" ) )
	return "QActionGroup";
    else if ( o->inherits( "QDesignerPopupMenu" ) )
	return "QPopupMenu";
#ifndef QT_NO_SQL
    else if ( o->inherits( "QDesignerDataBrowser" ) )
	return "QDataBrowser";
    else if ( o->inherits( "QDesignerDataView" ) )
	return "QDataView";
#endif
    return o->className();
}

QString WidgetFactory::defaultSignal( QObject *w )
{
    if ( w->inherits( "QRadioButton" ) || w->inherits( "QCheckBox" ) )
	return "toggled";
    else if ( w->inherits( "QButton" ) || w->inherits( "QButtonGroup" ) )
	return "clicked";
    else if ( w->inherits( "QTextBrowser" ) )
	return "linkClicked";
    else if ( w->inherits( "QLineEdit" ) || w->inherits( "QTextEdit" ) )
	return "textChanged";
    else if ( w->inherits( "QListView" ) || w->inherits( "QIconView" ) ||
	      w->inherits( "QListBox" ) || w->inherits( "QTable" ) )
	return "selectionChanged";
    else if ( w->inherits( "QTabWidget" ) )
	return "selected";
    else if ( w->inherits( "QWidgetStack" ) )
	return "aboutToShow";
    else if ( w->inherits( "QSpinBox" ) || w->inherits( "QSlider" ) ||
	      w->inherits( "QScrollBar" ) || w->inherits( "QDateEdit" ) ||
	      w->inherits( "QTimeEdit" ) || w->inherits( "QDateTimeEdit" ) ||
	      w->inherits( "QDial" ) )
	return "valueChanged";
    else if ( w->inherits( "QComboBox" ) )
	return "activated";
    return QString::null;
}

/*!  As some properties are set by default when creating a widget this
  functions markes this properties as changed. Has to be in sync with
  createWidget()!
*/

void WidgetFactory::initChangedProperties( QObject *o )
{
    if ( MainWindow::self && MainWindow::self->currProject() &&
	 MainWindow::self->currProject()->fakeFormFileFor( o ) )
	return;
    MetaDataBase::setPropertyChanged( o, "name", TRUE );
    if ( !o->inherits( "QDesignerToolBar" ) && !o->inherits( "QDesignerMenuBar" ) )
	MetaDataBase::setPropertyChanged( o, "geometry", TRUE );