Change QGraphicsTextItem edit trigger from single click to double click

[martonmiklos]

I am working on a patch for the QtCharts module (https://codereview.qt-project.org/#/c/239957) which main goal is making chart labels (QGrapcshiTextItems) editable.

I can easily enable the editing of the QGraphicsTextItem with the QGraphicsTextItem::setTextInteractionFlags, but by default a single click will enable the edit mode.

The reviewers asked me to change this behavior to double click.

I have tried to ignore the event in the reimplemented mousePressEvent, but the single click still triggers the editing.

Any other idea would be welcome!

[SGaist]

Hi,

What about using mouseDoubleClickEvent ?

[martonmiklos]

@SGaist

Hi Sam,

Thank you for your hint, but my first problem was preventing the edit trigger on single click.

For the posterity I have ended up with the following solution:

• Disable the textInteraction flags by default
• Override the QGraphicsTextItem::sceneEvent with the following:

bool ValueAxisLabel::sceneEvent(QEvent *event)
{
    if (event->type() == QEvent::GraphicsSceneMouseDoubleClick) {
        setTextInteractionFlags(Qt::TextEditorInteraction);

        bool ret = QGraphicsTextItem::sceneEvent(event);
        // QGraphicsTextItem::sceneevent needs to be processed before
        // the focus
        setFocus(Qt::MouseFocusReason);
        return ret;
    }
    return QGraphicsTextItem::sceneEvent(event);
}

The textInteractionFlags should be disabled in the overridden focusOutEvent.