QtCollider/QcWidgetFactory.h

   1 /************************************************************************
   2 *
   3 * Copyright 2010 Jakob Leben (jakob.leben@gmail.com)
   4 *
   5 * This file is part of SuperCollider Qt GUI.
   6 *
   7 * This program is free software: you can redistribute it and/or modify
   8 * it under the terms of the GNU General Public License as published by
   9 * the Free Software Foundation, either version 3 of the License, or
  10 * (at your option) any later version.
  11 *
  12 * This program is distributed in the hope that it will be useful,
  13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 * GNU General Public License for more details.
  16 *
  17 * You should have received a copy of the GNU General Public License
  18 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  19 *
  20 ************************************************************************/
  21
  22 #ifndef QC_WIDGET_FACTORY_H
  23 #define QC_WIDGET_FACTORY_H
  24
  25 #include "QcObjectFactory.h"
  26 #include "QWidgetProxy.h"
  27
  28 #include <QLayout>
  29
  30 template <class QWIDGET>
  31 class QcWidgetFactory : public QcObjectFactory<QWIDGET>
  32 {
  33 public:
  34
  35   virtual QObjectProxy *newInstance( PyrObject *scObject, QList<QVariant> & arguments ) {
  36
  37     int argc = arguments.count();
  38
  39     // check if parent arg is valid;
  40
  41     QObjectProxy *parentProxy = argc > 0 ? arguments[0].value<QObjectProxy*>() : 0;
  42
  43     // create the widget
  44
  45     QWIDGET *widget = new QWIDGET();
  46     QWidget *w = widget; // template parameter type-safety
  47
  48     QWidgetProxy *proxy = new QWidgetProxy ( w, scObject );
  49
  50     // set requested geometry
  51
  52     QRect r;
  53     if( argc > 1 ) r = arguments[1].value<QRect>();
  54     if( r.size().isEmpty() ) r.setSize( w->sizeHint() );
  55
  56     w->setGeometry( r );
  57
  58     // automatically support drag and drop
  59
  60     w->setAcceptDrops( true );
  61
  62     // do custom initialization
  63
  64     initialize( proxy, widget, arguments ); // use template parameter type
  65
  66     // set parent
  67
  68     QWidget *parent = parentProxy ? qobject_cast<QWidget*>( parentProxy->object() ) : 0;
  69
  70     if( parent ) {
  71
  72       // Ok, we have the parent, so stuff the child in
  73
  74       const QMetaObject *mo = parent->metaObject();
  75       bool ok = mo->invokeMethod( parent, "addChild", Q_ARG( QWidget*, w ) );
  76
  77       if( !ok ) w->setParent( parent );
  78
  79       w->show();
  80     }
  81
  82     return proxy;
  83   }
  84
  85 protected:
  86
  87   virtual void initialize( QWidgetProxy *, QWIDGET *, QList<QVariant> & ) {};
  88 };
  89
  90 #endif