[Interest] Future of Qt with Ios
Kate Alhola
kate.alhola at gmail.com
Wed Sep 17 17:56:04 CEST 2014
Thank you about this hint. It looks that this is not all. Orientation
change is handled in
qioswindow.mm: - (void)layoutSubviews . This method is called normally with
ios7 and
actualGeometry changes when orientation changes. In IOS8 this does no
longer work.
This function is now called 6 times during one phone orientation change.
I can get orientation from root window dimensions but that's not yet all.
setting size does not produce results i wanted.
Kate
On Tue, Sep 16, 2014 at 6:55 PM, Brian Dentino <brian.dentino at gmail.com>
wrote:
> There are a number of ways you could implement a workaround for this;
> here's one. Modify the QIOSScreen::updateProperties() function as follows.
> Basically, landscape/portrait detection seems to work fine, but the
> UIScreen bounds width/height get flipped between iOS7 and iOS8. This just
> checks if the orientation is landscape or portrait and sets the geometry
> appropriately based on which is larger, height or width.
>
> void QIOSScreen::updateProperties()
> {
> bool inPortrait =
> UIInterfaceOrientationIsPortrait(m_uiWindow.rootViewController.interfaceOrientation);
>
> qreal width = inPortrait
> ? qMin(m_uiScreen.bounds.size.height,
> m_uiScreen.bounds.size.width)
> : qMax(m_uiScreen.bounds.size.height,
> m_uiScreen.bounds.size.width);
> qreal height = inPortrait
> ? qMax(m_uiScreen.bounds.size.height,
> m_uiScreen.bounds.size.width)
> : qMin(m_uiScreen.bounds.size.height,
> m_uiScreen.bounds.size.width);
> QRect geometry = inPortrait
> ? fromCGRect(m_uiScreen.bounds).toRect()
> : QRect(m_uiScreen.bounds.origin.x, m_uiScreen.bounds.origin.y,
> width, height);
>
> if (geometry != m_geometry) {
> m_geometry = geometry;
>
> const qreal millimetersPerInch = 25.4;
> m_physicalSize = QSizeF(m_geometry.size()) / m_unscaledDpi *
> millimetersPerInch;
>
> QWindowSystemInterface::handleScreenGeometryChange(screen(),
> m_geometry);
> }
>
> QRect availableGeometry = geometry;
>
> CGSize applicationFrameSize = m_uiScreen.applicationFrame.size;
> int statusBarHeight = geometry.height() - (inPortrait ?
> applicationFrameSize.height : applicationFrameSize.width);
>
> //TODO: Need to handle whether or not statusbar is hidden/overlapped
> on iOS 7+
> availableGeometry.adjust(0, statusBarHeight, 0, 0);
>
> if (availableGeometry != m_availableGeometry) {
> m_availableGeometry = availableGeometry;
>
> QWindowSystemInterface::handleScreenAvailableGeometryChange(screen(),
> m_availableGeometry);
> }
>
> if (screen())
> layoutWindows();
> }
>
> If you don't want to do the runtime checks, you can probably just add an
> ifdef block to check the iOS version and use the width/height appropriately.
>
> If you don't want to/can't modify the Qt source, I'm pretty sure you could
> achieve the effect by simply registering for the proper orientation updates
> in your application (using orientationUpdateMask) then setting the
> width/height of your root window in a similar way from within your handler
> slot.
>
> If anyone knows of a better way to do this, I'm all ears :)
>
> Brian
>
> On Sep 16, 2014, at 4:38 AM, Kate Alhola <kate.alhola at gmail.com> wrote:
>
> Is there some part that i could backport to 5.3.2 ? Because IOS8 is out,
> Apple requires apps run on that, so this bug in practice prevents anyone
> submitting app to appstore.
>
> Kate
>
> Lähetetty iPadista
>
> Gustavsen Richard <Richard.Gustavsen at digia.com> kirjoitti 16.9.2014 kello
> 13.47:
>
> The orientation bug is a known issue, and will be fixed with Qt-5.4.
>
> -Richard
>
> ------------------------------
> *Fra:* Kate Alhola [kate.alhola at gmail.com]
> *Sendt:* 16. september 2014 11:51
> *Til:* Gustavsen Richard
> *Kopi:* Karl Loveridge; interest at qt-project.org
> *Emne:* Re: [Interest] Future of Qt with Ios
>
> My work getting app working with ios8 continues, alone (alone, no one
> is interested to share experiences).
>
> After i got basic stuff working with Qt5.3.2RC and using NSFileManager
> method to get right path to data files i found next issue. Screen rotation
> does not work any more, or it rotates but does not notify app that it is
> rotated. So if I have portrait and i turn device to landscape, i have upper
> part of portrait visible in left side of landscape screen with right
> orientation but width is still portrait width. I put qDebug to eventFilter
> and I see that absolutely no event arrives when i turn screen.
>
> Kate
>
> On Sun, Sep 14, 2014 at 8:13 PM, Kate Alhola <kate.alhola at gmail.com>
> wrote:
>
>> On Fri, Sep 12, 2014 at 10:15 AM, Gustavsen Richard <
>> Richard.Gustavsen at digia.com> wrote:
>>
>>> We always work to support the latest versions of an OS, also on iOS.
>>> So yes, Qt will build and and run on iOS 8. Internally we have been working
>>> with the developer preview for some time already. We have no plans for
>>> Metal yet, though.
>>>
>>
>>
>> I tried to look and ask what does this mean in practice. I tried with
>> some qt supplied demo apps, Latest released Qt 5.3.1 does NOT run in IOS8,
>> Qt5.3.2RC does run. When I tried to get my app running, i noticed that app
>> data directories are now in new location and I needed to use
>> [NSFileManager defaultManager] URLsForDirectory:NSDocumentDirectory to
>> get my app working.
>>
>> Kate
>>
>>
>>
>>>
>>> -Richard
>>>
>>> ------------------------------
>>> *Fra:* interest-bounces+richard.gustavsen=digia.com at qt-project.org
>>> [interest-bounces+richard.gustavsen=digia.com at qt-project.org] på vegne
>>> av Karl Loveridge [KLoveridge at eatsleepplay.biz]
>>> *Sendt:* 12. september 2014 02:10
>>> *Til:* interest at qt-project.org
>>> *Emne:* [Interest] Future of Qt with Ios
>>>
>>> I’m really rooting for Qt. I love it so far. I’ve invested about 7
>>> months into a project using Qt. But I’m having some doubts that I wonder if
>>> anyone could help me with.
>>>
>>> I’m concerned that Qt and the iOS are a bit at odds with each other. For
>>> instance, Apple just announced iOS 8. Try to find information about how Qt
>>> is going to handle the new OS change. I can’t find anything. Is Qt planning
>>> on supporting Metal (which is Apple’s new OpenGL replacement—which is 10x
>>> faster than OpenGL)—which is exclusively Apple. Just questions like these
>>> bother me that there isn’t “buzz” happening around Qt.
>>>
>>> Does anyone have any thoughts on this?
>>>
>>> With my project, I’m at a bit of a cross roads. Its written with Qt at
>>> its heart. The hope was to have a nice environment to make a Apple/Android
>>> app. But I’m feeling a little hesitant about the direction I’m going in.
>>>
>>> _______________________________________________
>>> Interest mailing list
>>> Interest at qt-project.org
>>> http://lists.qt-project.org/mailman/listinfo/interest
>>>
>>>
>>
> _______________________________________________
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>
>
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