Qt QGraphicsView unit testing - how to keep the mouse in a "pressed" state?

c++, pyqt, qgraphicsview, qt4

Solution

Finally managed to get something that actually works:

w = gv.viewport()

# this actually gets the click to the view
#QTest.mouseMove(w, QPoint(80,80))
event = QMouseEvent(QEvent.MouseMove, QPoint(80,80), w.mapToGlobal(QPoint(80,80)), Qt.LeftButton, Qt.LeftButton, Qt.NoModifier);
#event.setSpontaneous(True)
QApplication.postEvent(w, event);
QTest.qWait(250)

#QTest.mouseMove(w, QPoint(80,80))
event = QMouseEvent(QEvent.MouseButtonPress, QPoint(80,80), w.mapToGlobal(QPoint(80,80)), Qt.LeftButton, Qt.LeftButton, Qt.NoModifier);
QApplication.postEvent(w, event);
QTest.qWait(250)

count = 0
while count < 20:

    #QTest.mouseMove(w, QPoint(80+count,80+count))
    event = QMouseEvent(QEvent.MouseMove, QPoint(80+count,80+count), w.mapToGlobal(QPoint(80+count,80+count)), Qt.LeftButton, Qt.LeftButton, Qt.NoModifier);
    QApplication.postEvent(w, event);
    t = w.mapToGlobal(QPoint(80+count,80+count))
    #QCursor.setPos(t)
    QTest.qWait(20)
    count = count + 1

event = QMouseEvent(QEvent.MouseButtonRelease, QPoint(100,100), w.mapToGlobal(QPoint(100,100)), Qt.LeftButton, Qt.LeftButton, Qt.NoModifier);
QApplication.postEvent(w, event);

Why these fabricated events work and the QTest ones don't I have no idea..

It appears that QTest will physically move the mouse, where as this code acts as if the mouse had moved but hasn't. Confusing I know!

Problem

I have a fairly complex QGraphicsView/Scene setup where by I have items with complex interactions. As such I want to unit test this to avoid creating bugs in already existing functionality. For one test I wish to: - Press the mouse down on an item in the scene - Move the mouse to the right - Release the mouse This will allow me to check that the item was selected, was moved by the correct amount, and was deselected. However I find that after sending mouseMove events the mouse state becomes "released", here is my code: ``` QTest.mousePress(gv.viewport(), Qt.LeftButton, Qt.NoModifier, QPoint(80,80), 100) QTest.mouseMove(gv.viewport(), QPoint(80,80), 200) QTest.mouseMove(gv.viewport(), QPoint(90,80), 300) QTest.mouseMove(gv.viewport(), QPoint(100,80), 400) QTest.mouseRelease(gv.viewport(), Qt.LeftButton, Qt.NoModifier, QPoint(80,80), 900) ``` Where gv is a QGraphicsView. The problem seems to be that the mouseMove events are seen as hoverMoveEvents by the QGraphicsItem - it should be seen as a mouseMoveEvent! According to the docs: http://qt-project.org/doc/qt-4.8/qgraphicsitem.html#setAcceptHoverEvents So it would seem that these simulated events do not set the "mouse grabber item"? Related: How to unit test qt graphics view widgets/items Edit: TLDR; Why are my fake mouse events not setting the current mouse grabber item? This causes QGraphicsItems to get mouseHover events instead of mouseMove events.

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