QGraphicsTextItem editing requires an action performed twice - c++

Question

I want to make a QGraphicsTextItem editable on double click, and make it movable when I click out.
#include <QApplication>
#include <QPainter>
#include <QGraphicsItem>
#include <QGraphicsView>
class TextItem: public QGraphicsTextItem
{
public:
TextItem()
{
setPlainText("hello world");
QFont f;
f.setPointSize(50);
f.setBold(true);
f.setFamily("Helvetica");
setFont(f);
setFlags(QGraphicsItem::ItemIsMovable |
QGraphicsItem::ItemIsFocusable |
QGraphicsItem::ItemIsSelectable);
setTextInteractionFlags(Qt::NoTextInteraction);
}
virtual void paint(QPainter* painter,
const QStyleOptionGraphicsItem* option,
QWidget* widget = NULL)
{
QGraphicsTextItem::paint(painter, option, widget);
}
protected:
virtual void focusOutEvent (QFocusEvent * event)
{
Q_UNUSED(event);
setTextInteractionFlags(Qt::NoTextInteraction);
}
virtual void mouseDoubleClickEvent(QGraphicsSceneMouseEvent * event)
{
Q_UNUSED(event);
setTextInteractionFlags(Qt::TextEditable); // TextEditorInteraction
}
};
int main(int argc, char *argv[])
{
QApplication a(argc, argv);
TextItem* t = new TextItem();
QGraphicsView view(new QGraphicsScene(-200, -150, 400, 300) );
view.scene()->addItem(t);
view.show();
return a.exec();
}
It does what I want - except I have to double-click twice
- first time I double click, I see a cursor but am unable to edit text (with either option, TextEditable or TextEditorInteraction (I probably want the latter). Then I double-click again and I can type to add or delete text.
It is a behavior that a user probably doesn't expect - and nothing I do seems to change it.
Am I doing something wrong, or is there anything I need to add ?

Answer 1

I expected a mouse action on a focusable item to give it focus automatically. I guess not...
In the mouseDoubleClickEvent, I added a call to setFocus()
virtual void mouseDoubleClickEvent(QGraphicsSceneMouseEvent * event)
{
Q_UNUSED(event);
setTextInteractionFlags(Qt::TextEditorInteraction);
setFocus();
}