Painting Faded away when alt key pressed,

[rajeshs]

Hi Friends,

I am using Qt 4.2 in Windows,

I am using ItemDelegate for ListWidget item , within that I am painting text and images as items using painter , If i press alt key or if i drag the mouse with in that listwiget,then all the list items are fading away,
How can i prevent this?

If anybody knows Please help me.

Thanks,
Rajesh.S

[jpn]

Is it a QItemDelegate subclass? Could we see the code of paint()?

[rajeshs]

Yes, this is subclass of QItemDelegate , Like this i am using 4 delegates for 4 seperate listwidgets in my program, and i am setting the corresponing delegates to corresponding widgets in QMainWindow subclass,

#include <QtGui>
#include "DelegateForStationsList.h"
#include<QRect>
#include<QIcon>
#include<QPixmap>
 
INT32 QDelegateForStationsList::x=0;
INT32 QDelegateForStationsList::y=-25;
 
//////////////////////////////////////////////////////////////////////////////////////
// Function		: QDelegateForStationsList Constructor
//
// Parameters	: *parent
//     				IN Parameters:None
//					OUT Parameters:None
//
// Description	: For initialization Purpose
//              
//
// Return		: void
//					0 in case of success
//					-1 in case of failure
///////////////////////////////////////////////////////////////////////////////////////
 
QDelegateForStationsList::QDelegateForStationsList(QObject *parent)
     : QItemDelegate(parent)
{
 
}
 
//////////////////////////////////////////////////////////////////////////////////////
// Function		: paint
//
// Parameters	: *painter,option,index
//			    	IN Parameters:None
//					OUT Parameters:None
//
// Description	: paints the elements into the listwidget in customized format
//              
//
// Return		: void
//					0 in case of success
//					-1 in case of failure
///////////////////////////////////////////////////////////////////////////////////////
 
void QDelegateForStationsList::paint(QPainter* painter, const QStyleOptionViewItem& option, const QModelIndex& index) const   
 { 
		painter->save();
		painter->restore();
      	QString text = index.data(Qt::DisplayRole).toString();
 	    QIcon icon1 = qvariant_cast<QIcon>(index.data(Qt::DecorationRole));   
     	QPixmap pixmap1 = icon1.pixmap(option.decorationSize);        
		QIcon icon2 = qvariant_cast<QIcon>(index.data(Qt::UserRole));   
     	QPixmap pixmap2 = icon2.pixmap(option.decorationSize);   
 
		drawDecoration(painter, option, QRect(x-5,y+17,30,30), pixmap1);       
		QFont textFont;
		textFont.setFamily("Arial");
		textFont.setPixelSize(13);
		if((text=="Bad Breisig Hp")||(text=="Sinzig(Rhein)")||(text=="Remagen")||(text=="Oberwinter")||(text=="Bn-Bad Godesberg"))
			textFont.setBold(true);
		else 
			textFont.setBold(false);
 
		painter->setFont(textFont);
		painter->drawText(x+30,y+35,text);
 
		if((text=="Sbk 23")||(text=="Sbk 367"))
		{
		painter->drawLine(280,y+17,273,y+24);
		painter->drawLine(273,y+24,280,y+31);
		painter->drawLine(280,y+31,273,y+38);
		painter->drawLine(273,y+38,280,y+45);
 
		}   
		y=y+25;
 
  }
//////////////////////////////////////////////////////////////////////////////////////
// Function		: reset
//
// Parameters	: void
//			    	IN Parameters:None
//					OUT Parameters:None
//
// Description	: resets the position for painting
//              
//
// Return		: void
//					0 in case of success
//					-1 in case of failure
///////////////////////////////////////////////////////////////////////////////////////
 
void QDelegateForStationsList::reset()
{
	QDelegateForStationsList::x=0;
	QDelegateForStationsList::y=-25;
}

#include <QtGui>
#include "DelegateForStationsList.h"
#include<QRect>
#include<QIcon>
#include<QPixmap>

INT32 QDelegateForStationsList::x=0;
INT32 QDelegateForStationsList::y=-25;

//////////////////////////////////////////////////////////////////////////////////////
// Function		: QDelegateForStationsList Constructor
//
// Parameters	: *parent
//     				IN Parameters:None
//					OUT Parameters:None
//
// Description	: For initialization Purpose
//              
//
// Return		: void
//					0 in case of success
//					-1 in case of failure
///////////////////////////////////////////////////////////////////////////////////////

QDelegateForStationsList::QDelegateForStationsList(QObject *parent)
     : QItemDelegate(parent)
{

}

//////////////////////////////////////////////////////////////////////////////////////
// Function		: paint
//
// Parameters	: *painter,option,index
//			    	IN Parameters:None
//					OUT Parameters:None
//
// Description	: paints the elements into the listwidget in customized format
//              
//
// Return		: void
//					0 in case of success
//					-1 in case of failure
///////////////////////////////////////////////////////////////////////////////////////

void QDelegateForStationsList::paint(QPainter* painter, const QStyleOptionViewItem& option, const QModelIndex& index) const   
 { 
		painter->save();
		painter->restore();
      	QString text = index.data(Qt::DisplayRole).toString();
 	    QIcon icon1 = qvariant_cast<QIcon>(index.data(Qt::DecorationRole));   
     	QPixmap pixmap1 = icon1.pixmap(option.decorationSize);        
		QIcon icon2 = qvariant_cast<QIcon>(index.data(Qt::UserRole));   
     	QPixmap pixmap2 = icon2.pixmap(option.decorationSize);   
		
		drawDecoration(painter, option, QRect(x-5,y+17,30,30), pixmap1);       
		QFont textFont;
		textFont.setFamily("Arial");
		textFont.setPixelSize(13);
		if((text=="Bad Breisig Hp")||(text=="Sinzig(Rhein)")||(text=="Remagen")||(text=="Oberwinter")||(text=="Bn-Bad Godesberg"))
			textFont.setBold(true);
		else 
			textFont.setBold(false);
		
		painter->setFont(textFont);
		painter->drawText(x+30,y+35,text);
       
		if((text=="Sbk 23")||(text=="Sbk 367"))
		{
		painter->drawLine(280,y+17,273,y+24);
		painter->drawLine(273,y+24,280,y+31);
		painter->drawLine(280,y+31,273,y+38);
		painter->drawLine(273,y+38,280,y+45);
	
		}   
		y=y+25;

  }
//////////////////////////////////////////////////////////////////////////////////////
// Function		: reset
//
// Parameters	: void
//			    	IN Parameters:None
//					OUT Parameters:None
//
// Description	: resets the position for painting
//              
//
// Return		: void
//					0 in case of success
//					-1 in case of failure
///////////////////////////////////////////////////////////////////////////////////////

void QDelegateForStationsList::reset()
{
	QDelegateForStationsList::x=0;
	QDelegateForStationsList::y=-25;
}

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