Hello!

I created a QTreeWidget with QToolButtons on sub level items, and by clicking on the button it should be removed from the treewidget with it's QTreeWidgetItem.
The problem is when i expand the first top level item, it's crashes.

May i use QTreeWidget improperly?
Please help!

Here is the code representing my problem:

Qt Code: 
  1. #ifndef TRASH2_H
  2. #define TRASH2_H
  3.  
  4. #include <QtGui/QMainWindow>
  5. #include <QToolButton>
  6. #include <QStringList>
  7. #include "ui_trash2.h"
  8.  
  9. class trash2 : public QMainWindow
  10. {
  11. 	Q_OBJECT
  12.  
  13. public:
  14. 	trash2(QWidget *parent = 0, Qt::WFlags flags = 0)
  15. 	: QMainWindow(parent, flags)
  16. 	{
  17. 		ui.setupUi(this);
  18.  
  19. 		QTreeWidgetItem* item = 0;
  20. 		item = addTopLevelItem( 0 );
  21. 		addSubLevelItem( item, 0 );
  22. 		addSubLevelItem( item, 1 );
  23. 		addSubLevelItem( item, 2 );
  24.  
  25. 	}
  26.  
  27. 	~trash2()
  28. 	{
  29.  
  30. 	}
  31.  
  32. 	QTreeWidgetItem* addTopLevelItem(int i)
  33. 	{
  34. 		QTreeWidgetItem* item = 0;
  36. 		list << QString("Top%1").arg(i);
  37. 		item = new QTreeWidgetItem( list );
  38. 		ui.treeWidget->addTopLevelItem( item );
  39.  
  40. 		return item;
  41. 	}
  42.  
  43. 	void addSubLevelItem(QTreeWidgetItem* parentItem, int i)
  44. 	{
  45. 		QTreeWidgetItem* item = 0;
  46. 		QToolButton* button = 0;
  48. 		item = new QTreeWidgetItem( parentItem );
  49. 		button = new QToolButton( ui.treeWidget );
  50. 		button->setText( QString("button%1").arg(i) );
  51. 		button->setToolButtonStyle( Qt::ToolButtonTextBesideIcon );
  52. 		button->setAutoRaise( true );
  53. 		button->setChecked( false );
  54.  
  55. 		connect( button, SIGNAL( pressed() ), this, SLOT( buttonPressed() ) );
  56. 		parentItem->addChild( item );
  57. 		vmi[button] = item;
  58. 		ui.treeWidget->setItemWidget( item, 0, button );
  59. 	}
  60.  
  61. public slots:
  62. 	void buttonPressed()
  63. 	{
  64. 		QToolButton* button = dynamic_cast<QToolButton* >( sender() );
  65. 		if ( button )
  66. 		{
  67. 			QTreeWidgetItem* item = vmi[button];
  68. 			vmi.remove( button );
  69. 			button->disconnect();
  70. 			button->deleteLater();
  71. 			QTreeWidgetItem* parent = item->parent();
  72. 			if ( parent )
  73. 			{
  74. 				parent->removeChild( item );
  75. 			}
  76. 			delete item;
  77. 		}
  78. 	}
  79.  
  80. private:
  81. 	Ui::trash2Class ui;
  82. 	QMap<QToolButton* , QTreeWidgetItem* > vmi;
  83. };
  84.  
  85. #endif // TRASH2_H
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