hello.
I have implemented a custom delegate for the extracted widgetbox of the qt designer.
The widgets in the widgetbox are buttons with an icon
My problem is that i must implement a special behaviour for the widgets.
in short when i press a widget i must first disable all the widget in the widgetbox without the selected widget then select the selected widget .
that is the problem:
the "paint" function that draw all the widgets is called only if a widged is dirty or has need to be drawed.
But I need to redraw all the widgets for each time i press a widget(that becomes the selected widget).
thanks.

this is the code
Qt Code: 
  1. CustomItemDelegate::CustomItemDelegate(QObject *parent) :
  2.     QItemDelegate(parent) 
  3. {
  4.     _state =  QStyle::State_Enabled;
  5.  
  6. }
  7.  
  8.  
  9. void CustomItemDelegate::paint(QPainter *painter,
  10.                    const QStyleOptionViewItem &option,
  11.                    const QModelIndex &index) const
  12. {
  13.    const QSortFilterProxyModel* model = 
  14. 	   static_cast<const QSortFilterProxyModel*>(index.model());
  15.  
  16. 	QDesignerWidgetBoxInterface::Widget widget =((WidgetBoxCategoryModel*)model->sourceModel())->widgetAt(index);
  17.  
  18. 	QString strIcon = widget.iconName();
  19. 	QString text = widget.name();
  20. 	QRect rect = option.rect;
  21. 	QRect buttonRect( rect);
  22. 	buttonRect.setWidth( 30);
  23.  
  25. 	QIcon pq(strIcon);
  26.  
  27. 	button.icon = pq;
  28. 	button.iconSize = QSize(22, 22);
  29. 	button.palette = option.palette;
  30.  
  31. 	button.rect = buttonRect;
  32.     //button.text = text;
  33.     button.state = _state | QStyle::State_Enabled;
  34.  
  35.     QApplication::style()->drawControl
  36.         (QStyle::CE_PushButton, &button, painter);
  37. }
  38.  
  39. QSize CustomItemDelegate::sizeHint(const QStyleOptionViewItem &/*option*/,
  40.                        const QModelIndex &/*index*/) const
  41. {
  42.     //hard coding size for test purpose, 
  43.     //actual size hint can be calculated from option param
  44.     return QSize(800,30);
  45. }
  46.  
  47. bool CustomItemDelegate::editorEvent(QEvent *event, 
  49.     const QStyleOptionViewItem &option, 
  50.     const QModelIndex &index)
  51. {
  52. 	const QSortFilterProxyModel* modelx = 
  53. 	   static_cast<const QSortFilterProxyModel*>(index.model());
  54.  
  55. 	QDesignerWidgetBoxInterface::Widget widget =((WidgetBoxCategoryModel*)modelx->sourceModel())->widgetAt(index);
  56.  
  57. 	m_strName = widget.name();
  58.  
  59. 	if( event->type() == QEvent::MouseButtonPress ||
  60.         event->type() == QEvent::MouseButtonRelease ) {
  61.     } else {
  62.          //ignoring other mouse event and reseting button's state
  63.          _state = QStyle::State_Raised;
  64.         return true;
  65.     }
  66.  
  67.     QRect buttonRect( option.rect);
  68.     //buttonRect.setY(option.rect.y()+ 35);
  69.     //buttonRect.setHeight( 30);
  70. 	buttonRect.setWidth( 30);
  71.     QMouseEvent* mouseEvent = static_cast<QMouseEvent*>(event);
  72.     if( !buttonRect.contains( mouseEvent->pos()) ) {
  73.         _state = QStyle::State_Raised;
  74.         return true;
  75.     }
  76.  
  77.  
  78. 	if(widget.getFunction() == QDesignerWidgetBoxInterface::Widget::Creator)
  79. 	{
  80. 		if(m_nOldName != widget.name() && m_nOldName != ""){
  81. 			_state = QStyle::State_Raised;
  82. 			return true;
  83. 		}
  84.  
  85. 		if( event->type() == QEvent::MouseButtonPress){
  86.  
  87. 			//if(_state == QStyle::State_Sunken)
  88. 			//	_state = QStyle::State_Raised;
  89. 			//else
  90. 			//	_state = QStyle::State_Sunken;
  91. 		}
  92. 		else if( event->type() == QEvent::MouseButtonRelease) {
  93. 			if(_state == QStyle::State_Sunken){
  94. 				_state = QStyle::State_Raised;
  95. 			}else{
  96. 				_state = QStyle::State_Sunken;
  97. 				m_nOldName = widget.name();
  98. 			}
  99.  
  100. 		}
  101.  
  102. 	}
  103.  
  104.  
  105.     else if( event->type() == QEvent::MouseButtonPress) {            
  106.         _state = QStyle::State_Sunken;
  107.     } else if( event->type() == QEvent::MouseButtonRelease) {
  108.         _state = QStyle::State_Raised;	
  109. 		emit buttonClicked( index);
  110. 		emit pressDel(m_strName);	
  111. 	}    
  112.     return true;
  113. }
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thanks.