Fix crash

git-svn-id: svn+ssh://svn.tuxfamily.org/svnroot/qet/qet/trunk@5011 bfdf4180-ca20-0410-9c96-a3a8aa849046

sources/ui/abstractelementpropertieseditorwidget.cpp

@@ -18,6 +18,5 @@
 #include "abstractelementpropertieseditorwidget.h"
 
 AbstractElementPropertiesEditorWidget::AbstractElementPropertiesEditorWidget(QWidget *parent) :
-	PropertiesEditorWidget(parent),
-	m_element (nullptr)
+	PropertiesEditorWidget(parent)
 {}

sources/ui/abstractelementpropertieseditorwidget.h

@@ -19,6 +19,7 @@
 #define ABSTRACTELEMENTPROPERTIESEDITORWIDGET_H
 
 #include "PropertiesEditor/propertieseditorwidget.h"
+#include "QPointer"
 
 class Element;
 
@@ -34,7 +35,7 @@ class AbstractElementPropertiesEditorWidget : public PropertiesEditorWidget
 		virtual void setElement(Element *element) =0;
 
 	protected:
-		Element *m_element;
+		QPointer <Element> m_element;
 
 
 };

sources/ui/masterpropertieswidget.cpp

@@ -33,7 +33,6 @@
 MasterPropertiesWidget::MasterPropertiesWidget(Element *elmt, QWidget *parent) :
 	AbstractElementPropertiesEditorWidget(parent),
 	ui(new Ui::MasterPropertiesWidget),
-	m_showed_element (nullptr),
 	m_project(nullptr)
 {
 	ui->setupUi(this);
@@ -99,7 +98,8 @@ MasterPropertiesWidget::~MasterPropertiesWidget()
 	if (m_showed_element)
 		m_showed_element->setHighlighted(false);
 	
-	m_element->setHighlighted(false);
+	if(m_element)
+		m_element->setHighlighted(false);
 	
 	delete ui;
 }

sources/ui/masterpropertieswidget.h

@@ -71,7 +71,7 @@ class MasterPropertiesWidget : public AbstractElementPropertiesEditorWidget
 	Ui::MasterPropertiesWidget *ui;
 	QHash <QTreeWidgetItem *, Element *> m_qtwi_hash;
 	QTreeWidgetItem *m_qtwi_at_context_menu = nullptr;
-	Element *m_showed_element;
+	QPointer <Element> m_showed_element;
 	QETProject *m_project;
 	QMenu *m_context_menu;
 	QAction *m_link_action,