QChart not getting keypress events.

[yagabey]

Hi,

I am subclassing QChart. But QChart does not seem to receive keypress events.

class Chart : public QChart
{
public:
    explicit Chart(QGraphicsItem *parent = 0, Qt::WindowFlags wFlags = 0);
 
protected:
    void keyPressEvent(QKeyEvent *event);
    void mousePressEvent (QGraphicsSceneMouseEvent* me);
 
private:
 
};

class Chart : public QChart
{
public:
    explicit Chart(QGraphicsItem *parent = 0, Qt::WindowFlags wFlags = 0);

protected:
    void keyPressEvent(QKeyEvent *event);
    void mousePressEvent (QGraphicsSceneMouseEvent* me);

private:

};

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Chart::Chart(QGraphicsItem *parent, Qt::WindowFlags wFlags)
    : QChart(QChart::ChartTypeCartesian, parent, wFlags)
{
    setFlags(ItemIsFocusable| ItemIsSelectable | ItemIsMovable | ItemSendsScenePositionChanges);
    setAcceptHoverEvents(true);
    setFocus();
}
 
void Chart::keyPressEvent(QKeyEvent *event)
{
    qDebug("keyPressEvent");
    QChart::keyPressEvent(event);
}
 
void Chart::mousePressEvent(QGraphicsSceneMouseEvent *me)
{
    qDebug("mousePressEvent");
    QChart::mousePressEvent(me);
}

Chart::Chart(QGraphicsItem *parent, Qt::WindowFlags wFlags)
    : QChart(QChart::ChartTypeCartesian, parent, wFlags)
{
    setFlags(ItemIsFocusable| ItemIsSelectable | ItemIsMovable | ItemSendsScenePositionChanges);
    setAcceptHoverEvents(true);
    setFocus();
}

void Chart::keyPressEvent(QKeyEvent *event)
{
    qDebug("keyPressEvent");
    QChart::keyPressEvent(event);
}

void Chart::mousePressEvent(QGraphicsSceneMouseEvent *me)
{
    qDebug("mousePressEvent");
    QChart::mousePressEvent(me);
}

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I am adding the item into a QGraphicsscene:

QGraphicsScene* sceneGraph= new QGraphicsScene();
        sceneGraph->setSceneRect(0,0,1024,768);
        sceneGraph->addItem(chart);
        ui->graphicsView->setScene(sceneGraph);

QGraphicsScene* sceneGraph= new QGraphicsScene();
        sceneGraph->setSceneRect(0,0,1024,768);
        sceneGraph->addItem(chart);
        ui->graphicsView->setScene(sceneGraph);

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It gets mouse events but not key press events.

Any idea what could be the reason?

Thanks.

[yagabey]

Ok, i got the problem. MousePress event does not set the focus on ChartItem or it is setting focus on some sub items, i dont know. Setting focus manually after mouse press event solves the issue.

void Chart::mousePressEvent(QGraphicsSceneMouseEvent *me)
{
    qDebug("mousePressEvent");
    QChart::mousePressEvent(me);
    setFocus();
}

void Chart::mousePressEvent(QGraphicsSceneMouseEvent *me)
{
    qDebug("mousePressEvent");
    QChart::mousePressEvent(me);
    setFocus();
}

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