Right- this is what Thiago meant in his reply to my original posting.
And verified on Mac OS X: before posting, I tried QApplication::mouseButtons()
to detect the mouse state, and got false information. The mouse events that
drive the resizing aren't getting to Qt at all.
Well, then again, putting a breakpoint in my resize handler, I see this:
0 grafRec::doResizeEvent GrafRecImplementation.cpp 966
0x1011b0247
1 wDataClass::baseDoResizeEvent WM_WinClasses.cpp 1803
0x1010b5f40
2 IgorWindowWdPContentArea::resizeEvent IgorWindowContentArea.cpp
205 0x100a724a6
3 QWidget::event qwidget.cpp 8541 0x108547e4f
4 IgorWindowWdPContentArea::event IgorWindowContentArea.cpp 181
0x100a73225
5 QApplicationPrivate::notify_helper qapplication.cpp 4562
0x1084d520f
6 QApplication::notify qapplication.cpp 4527 0x1084d85f5
7 IgorAppObject::notify IgorAppObject.cpp 537 0x100a48d4d
8 QCoreApplication::notifyInternal qcoreapplication.cpp 949
0x109aefa2a
9 QCoreApplication::sendEvent qcoreapplication.h 231
0x10003be39
10 QWidgetPrivate::setGeometry_sys_helper qwidget_mac.mm 4624
0x10844af89
11 QWidgetPrivate::setGeometry_sys qwidget_mac.mm 4556 0x10844b7c8
12 QWidget::setGeometry qwidget.cpp 6974 0x108543a71
13 QWidget::setGeometry qwidget.h 1018 0x1085141ba
14 QWidgetItem::setGeometry qlayoutitem.cpp 490 0x108517855
15 QGridBox::setGeometry qgridlayout.cpp 85 0x1085093ae
16 QGridLayoutPrivate::distribute qgridlayout.cpp 964 0x108507411
17 QGridLayout::setGeometry qgridlayout.cpp 1460 0x108507534
18 QLayoutPrivate::doResize qlayout.cpp 679 0x108513721
19 QLayout::widgetEvent qlayout.cpp 703 0x108513dc9
20 QApplicationPrivate::notify_helper qapplication.cpp 4553
0x1084d51d9
21 QApplication::notify qapplication.cpp 4527 0x1084d85f5
22 IgorAppObject::notify IgorAppObject.cpp 537 0x100a48d4d
23 QCoreApplication::notifyInternal qcoreapplication.cpp 949
0x109aefa2a
24 QCoreApplication::sendSpontaneousEvent qcoreapplication.h 234
0x10843d6cf
25 qt_sendSpontaneousEvent qapplication.cpp 5560 0x1084d4770
26 -[QCocoaWindowDelegate syncSizeForWidget:toSize:fromSize:]
qcocoawindowdelegate_mac.mm 139 0x10845d1bd
27 -[QCocoaWindowDelegate windowDidResize:]
qcocoawindowdelegate_mac.mm 219 0x10845cd68
28 _nsnote_callback 0x7fff868e6ad5
29 __CFXNotificationPost 0x7fff88f6cfd0
30 _CFXNotificationPostNotification 0x7fff88f59548
31 -[NSNotificationCenter postNotificationName:object:userInfo:]
0x7fff868dda36
32 -[NSWindow _setFrameCommon:display:stashSize:]
0x7fff807d284a
33 -[NSTitledFrame resizeWithEvent:] 0x7fff80d79845
34 -[NSTitledFrame mouseDown:] 0x7fff809ec255
35 -[NSThemeFrame mouseDown:] 0x7fff809ec1bb
36 -[NSWindow sendEvent:] 0x7fff808ea3a7
37 -[QCocoaWindow sendEvent:] qcocoasharedwindowmethods_mac_p.h
183 0x10845a01b
38 -[NSApplication sendEvent:] 0x7fff8081fafa
39 -[QNSApplication sendEvent:] qcocoaapplication_mac.mm 186
0x1084604b7
40 -[NSApplication run] 0x7fff807b66de
41 QEventDispatcherMac::processEvents qeventdispatcher_mac.mm 615
0x10846d37a
42 QEventLoop::processEvents qeventloop.cpp 149 0x109aec3ca
43 QEventLoop::exec qeventloop.cpp 204 0x109aec61c
44 QCoreApplication::exec qcoreapplication.cpp 1221 0x109af03a0
45 QApplication::exec qapplication.cpp 3823 0x1084d8630
46 main IgorQtMain.cpp 497 0x101f0fd77
The lines at 39 and 37 are Qt code where the NSEvent type is 1, a mouse-down
event. So Qt does have the information, but chooses not to use it. I haven't
looked at Windows, and we're not yet in a position to look at Linux, so I don't
know how it works there.
I was looking at writing a bit of Cocoa code (yuck) to catch
NSWindowWillStartLiveResizeNotification and
NSWindowDidEndLiveResizeNotification, but a QTimer would be easier. The square
brackets are in the right places, and it works on Windows, too.
On 24-Feb-2014, at 5:50 PM, Jason H wrote:
> The problem is the window resize does not come from the application, it comes
> from the OS/Window Manager.
>
>
> From: "william.croc...@analog.com" <william.croc...@analog.com>
> To: interest@qt-project.org
> Sent: Monday, February 24, 2014 8:46 PM
> Subject: Re: [Interest] Finished resizing a window?
>
>
> >
> > We have windows in our application that are potentially expensive to
> > repaint, so
> > when the user resizes a window we may need to put off repainting until the
> > resizing is finished. It seems that we don't get mouse down/mouse up events
> > when
> > the user clicks in the window frame/resize grip area, so I can't wait until
> > mouse up.
> >
>
> Could you use this to watch for (then paint on) the mouse release?
>
> Qt::MouseButtons QApplication::mouseButtons() [static]
>
> Bill
>
>
> _______________________________________________
> Interest mailing list
> Interest@qt-project.org
> http://lists.qt-project.org/mailman/listinfo/interest
>
>
> _______________________________________________
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-John
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