Fix losing Focus on moving diagram position with keyboard

Due to the changes made in the commit "Add highlight current page in
ProjectView", there is a problem when moving diagrams in the ProjectView
using the keyboard. The diagrams lose focus after being moved.
The cause is: The DiagramItem loses its selection before the move
function is executed.

The code has been adjusted.

sources/elementspanelwidget.cpp

@@ -480,28 +480,33 @@ void ElementsPanelWidget::keyPressEvent   (QKeyEvent *e) {
 					break;
 					case Qt::Key_F3:
 					if (Diagram *selected_diagram = elements_panel -> selectedDiagram()) {
+						elements_panel->setSelectedItem(elements_panel->getItemForDiagram(selected_diagram));
 						emit(requestForDiagramMoveUp(selected_diagram));
 					}
 					break;
 					case Qt::Key_F4:
 					if (Diagram *selected_diagram = elements_panel -> selectedDiagram()) {
+						elements_panel->setSelectedItem(elements_panel->getItemForDiagram(selected_diagram));
 						emit(requestForDiagramMoveDown(selected_diagram));
 					}
 					break;
 					case Qt::Key_F5:
 					if (Diagram *selected_diagram = elements_panel -> selectedDiagram()) {
+						elements_panel->setSelectedItem(elements_panel->getItemForDiagram(selected_diagram));
 						emit(requestForDiagramMoveUpTop(selected_diagram));
 					}
 					
 					break;
 					case Qt::Key_F6:
 					if (Diagram *selected_diagram = elements_panel -> selectedDiagram()) {
+						elements_panel->setSelectedItem(elements_panel->getItemForDiagram(selected_diagram));
 						emit(requestForDiagramMoveDownx10(selected_diagram));
 					}
 					
 					break;
 					case Qt::Key_F7:
 					if (Diagram *selected_diagram = elements_panel -> selectedDiagram()) {
+						elements_panel->setSelectedItem(elements_panel->getItemForDiagram(selected_diagram));
 						emit(requestForDiagramMoveDownx100(selected_diagram));
 					}
 					
@@ -509,12 +514,14 @@ void ElementsPanelWidget::keyPressEvent   (QKeyEvent *e) {
 					break;
 					case Qt::Key_F8:
 					if (Diagram *selected_diagram = elements_panel -> selectedDiagram()) {
+						elements_panel->setSelectedItem(elements_panel->getItemForDiagram(selected_diagram));
 						emit(requestForDiagramMoveUpx10(selected_diagram));
 					}					
 					
 					break;
 					case Qt::Key_F9:
 					if (Diagram *selected_diagram = elements_panel -> selectedDiagram()) {
+						elements_panel->setSelectedItem(elements_panel->getItemForDiagram(selected_diagram));
 						emit(requestForDiagramMoveUpx100(selected_diagram));
 					}
 					break;

sources/genericpanel.cpp

@@ -781,7 +781,13 @@ void GenericPanel::projectDiagramsOrderChanged(QETProject *project,
 	}
 	
 		// select the moved diagram
-	setCurrentItem(qtwi_project -> child(from));
+	if(m_selected_item){
+		setCurrentItem(moved_qtwi_diagram);
+	}
+	else{
+		setCurrentItem(qtwi_project -> child(from));
+	}
+	m_selected_item = nullptr;
 
 	emit(panelContentChanged());
 }
@@ -1040,3 +1046,12 @@ void GenericPanel::emitFirstActivated()
 {
 	emit(firstActivated());
 }
+
+/**
+	@brief GenericPanel::setSelectedItem
+	@param selectedItem
+*/
+void GenericPanel::setSelectedItem(QTreeWidgetItem *selectedItem)
+{
+	m_selected_item = selectedItem;
+}

sources/genericpanel.h

@@ -171,6 +171,9 @@ class GenericPanel : public QTreeWidget {
 					 const QString &);
 	
 	// various other methods
+	public:
+	void setSelectedItem(QTreeWidgetItem *selectedItem);
+
 	protected:
 	virtual QString defaultText(QET::ItemType);
 	virtual QIcon   defaultIcon(QET::ItemType);
@@ -222,5 +225,7 @@ class GenericPanel : public QTreeWidget {
 		representing a title block template
 	*/
 	QHash<TitleBlockTemplateLocation, QTreeWidgetItem *> tb_templates_;
+
+	QTreeWidgetItem *m_selected_item = nullptr;
 };
 #endif