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, QtCollider::Variant arg[10] ) {
  36
  37     // Omit the first two arguments - parent and bounds
  38
  39     QWIDGET *w;
  40
  41     if( arg[2].type() == QMetaType::Void ) {
  42       w = new QWIDGET;
  43     }
  44     else {
  45       QObject *obj = QWIDGET::staticMetaObject.newInstance(
  46         arg[2].asGenericArgument(),
  47         arg[3].asGenericArgument(),
  48         arg[4].asGenericArgument(),
  49         arg[5].asGenericArgument(),
  50         arg[6].asGenericArgument(),
  51         arg[7].asGenericArgument(),
  52         arg[8].asGenericArgument(),
  53         arg[9].asGenericArgument()
  54       );
  55
  56       w = qobject_cast<QWIDGET*>(obj);
  57       if( !w ) {
  58         qcErrorMsg( QString("No appropriate constructor found for '%1'.")
  59           .arg( QWIDGET::staticMetaObject.className() ) );
  60         return 0;
  61       }
  62     }
  63
  64     QObjectProxy *prox( proxy(w, scObject) );
  65
  66     // check if parent arg is valid;
  67
  68     QObjectProxy *parentProxy( arg[0].value<QObjectProxy*>() );
  69
  70
  71     // set requested geometry
  72
  73     QRect r( arg[1].value<QRectF>().toRect() );
  74     if( r.size().isEmpty() ) r.setSize( w->sizeHint() );
  75
  76     w->setGeometry( r );
  77
  78     // automatically support drag and drop
  79
  80     w->setAcceptDrops( true );
  81
  82     // set parent
  83
  84     QWidget *parent = parentProxy ? qobject_cast<QWidget*>( parentProxy->object() ) : 0;
  85
  86     if( parent ) {
  87
  88       // Ok, we have the parent, so stuff the child in
  89
  90       const QMetaObject *mo = parent->metaObject();
  91       bool ok = mo->invokeMethod( parent, "addChild", Q_ARG( QWidget*, w ) );
  92
  93       if( !ok ) w->setParent( parent );
  94
  95       w->show();
  96     }
  97
  98     return prox;
  99   }
 100
 101 protected:
 102
 103   virtual QObjectProxy * proxy( QWIDGET *w, PyrObject *sc_obj )
 104   {
 105     QWidgetProxy *prox( new QWidgetProxy( w, sc_obj ) );
 106     initialize( prox, w );
 107     return prox;
 108   }
 109
 110   virtual void initialize( QWidgetProxy *proxy, QWIDGET *obj ) {};
 111 };
 112
 113 #endif