HOW to drag on view( only move up and down)?

[Joyce An]

Hi all,
there are many control in the widget. like the phone settings view. there are labels,radio buttons,line edit, time edit, list view and so on. I want to this widget can drag , it can move up and down.
how to realize that? do you know some good suggestion?
use

protected:
    void dragEnterEvent(QDragEnterEvent *event);
    void dropEvent(QDropEvent *event);
    void dragMoveEvent(QDragMoveEvent *event);
or
    void mousePressEvent(QMouseEvent *evt);
    void mouseReleaseEvent(QMouseEvent *event);
    void mouseMoveEvent(QMouseEvent *event);
?

thank you
best wishes!
Joyce

[Joyce An]

rewrite
void mousePressEvent(QMouseEvent *evt);
void mouseReleaseEvent(QMouseEvent *event);
void mouseMoveEvent(QMouseEvent *event);
these method.
who has mouse move example?

[Joyce An]

void mouseMoveEvent(QMouseEvent *event);
when call this method ? why my project doesn't call this method?

[danhicksbyron]

Event routines are called by the Qt runtime, if you set them up correctly.

[Joyce An]

Do you help me look at my code?

void MSCSettingsWidget::mouseMoveEvent(QMouseEvent *evt)
{
    if (!evt->modifiers().testFlag(Qt::ShiftModifier)) {
           QPoint pos = evt->pos();
           int distance = 0;
           scrollDirection = scrollMagnitude = 0;
           // determine the direction of automatic scrolling
           if (pos.x() < SCROLL_DISTANCE) {
               scrollDirection = Left;
               distance = pos.x();
               this->move(distance,0);
           }
           else if (width() - pos.x() < SCROLL_DISTANCE) {
               scrollDirection = Right;
               distance = width() - pos.x();
               this->move(distance,0);
           }
           if (pos.y() < SCROLL_DISTANCE) {
               scrollDirection |= Up;
               distance = pos.y();
               this->move(0,distance);
           }
           else if (height() - pos.y() < SCROLL_DISTANCE) {
               scrollDirection |= Down;
               distance = height() - pos.y();
               this->move(0,distance);
           }
           if (scrollDirection) {
               scrollMagnitude = qRound((SCROLL_DISTANCE - distance) / 8);
           }
           rubberBand->setGeometry(QRect(origin, evt->pos()).normalized());
    }
//    QGraphicsView::mouseMoveEvent( evt);
}

[danhicksbyron]

I've worked on similar algorithms. SCROLL_DISTANCE has to be fairly small (around 20) for this scheme to work on the phone, and then it gets pretty touchy.

You're also missing a point of reference. You need to capture the "mouse down" position and delta off of that.

[Joyce An]

 mScene = new QGraphicsScene(this);
  mView = new QGraphicsView(mScene, this);
  mView->setAcceptDrops(true);
  mView->setDragMode(QGraphicsView::ScrollHandDrag);

why it can't drag sensitive? some clicked controls can't drag move. do you use this method(mView->setDragMode(QGraphicsView::ScrollHandDrag)?