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  1. Qt
  2. QTBUG-48396

REG [4-5]: QWidget::mapToGlobal(0, 0) returns QPoint(0, 0) in ShowEvent for toplevels in some cases

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    • fb69a09a2490102ad0c3f6015e04942bb5df7505 (qtbase/5.6, 28.11.2015, 5.6)

    Description

      Calling Widget::mapToGlobal(0, 0) within ShowEvent returns QPoint(0, 0) for most cases (QDialog , QMenu set on QPushButton) as if the QWidget was at 0,0 itself.

      This reproduces in the example with the menu on the toolbar button and the file dialog opened by "File/Open". It works for the MainWindow and the context menu of the QPlainTextEdit.

      The example produces

      "5.6.0 xcb"
....
###  QEvent::Show MapToGlobalTest(0x7fff8d444b00) 
   QWindow:  QRect(500,300 640x480) vis= false window->mapToGlobal(0, 0)-> QPoint(500,300) 
   QWidgets:  QRect(500,300 256x243) widget->mapToGlobal(0, 0)-> QPoint(500,300)  [*** Mainwindow:ok ***]
QEvent::Show QWidgetWindow(0xfe4cc0, name = "MapToGlobalTestClassWindow")

[*** Click on Button menu ***]
QMoveEvent(513,347, non-spontaneous) QMenu(0xfd5ef0, name = "ButtonMenu")

###  QEvent::Show QMenu(0xfd5ef0, name="ButtonMenu") 
   QWindow:  QRect(0,0 640x480) vis= false window->mapToGlobal(0, 0)-> QPoint(0,0) 
   QWidgets:  QRect(513,347 134x46) widget->mapToGlobal(0, 0)-> QPoint(0,0) [*** 0, 0 unexpected ***]
QEvent::Show QWidgetWindow(0x10601d0, name = "ButtonMenuWindow")

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          relates to

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-49588 [REG 4.8->5.X] When programmatically opening a submenu of a context menu using QMenu::setActiveAction() before calling QMenu::exec(), it is shown at the wrong position

          • P3: Somewhat important - Should be fixed, but doesn't affect the release in any way.
          • Closed
          replaces

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-48387 Regression[4-5] mapToGlobal()

          • P2: Important - Urgent, should be fixed, but will not stop the release.
          • Closed
          For Gerrit Dashboard: QTBUG-48396
          # Subject Branch Project Status CR V
          141859,5 QWidget::mapTo/FromGlobal(): Avoid calling QWindow helpers until shown. 5.6 qt/qtbase Status: MERGED +2 0

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              kleint Friedemann Kleint
              kleint Friedemann Kleint
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                Updated:
                Resolved:

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