Subject: Re: A DBUS call for calling global shortcuts. -
msg#00195

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Re: Problem with QGraphicsLinearLayout

On Thursday, April 15, 2010 11:53:51 Christophe Olinger wrote: > I have a crash in my application (plasma media center) that I do not > understand. This is my situation: > > I have a bar which is supposed to show iconwidgets. The class of that bar > has a function which I use to add widgets to my bar. Depending on the > widget, I want it to be on the left, the middle or the right side of my > bar. Later I want to add a bottom part but that's not the problem at the > moment. (The function takes a list of Widgets as paramter) > > The way I understood layouts in Qt I did the following: > 1) I created a QGraphicsLinearLayout m_layoutHorizontalTop (this is the > container) > 2) I created additional layouts: m_layoutTopLeft, m_layoutTopMiddle, > m_layoutTopRight (this will be boxes in the container) > 3) In the init() of my bar I did: > m_layoutHorizontalTop->addItem(m_layoutTopLeft) (I only add the first box) > 4) On my bar I do: addLayout->(m_layoutHorizontalTop) > 5) my function adds items only to the m_layoutTopLeft, (later also to the > other layouts) > 6) no problem, icons are there > > Now as soon as I add this line in my init (which would add the next box): > m_layoutHorizontalTop->addItem(m_layoutTopMiddle) my application crashes on > startup?! > > It is not the fact that I add this layout that makes it crash, but the fact > that my function wants to add widgets to the TopLeft layout. I thought > these layouts would be boxes that I could fill with widgets, but why does > that fact that I put two boxes next to each other interfere with me adding > widgets in one box? > > Confusion :-? Looks like a problem I've run into as well, it's a bug in Qt: http://bugreports.qt.nokia.com/browse/QTBUG-6447 If you do QGraphicsLinearLayout* m_layout = new QGraphicsLinearLayout(this); m_outerLayout->addItem(m_layout); it'll crash, if you leave the parent out of the constructor: QGraphicsLinearLayout* m_layout = new QGraphicsLinearLayout; m_outerLayout->addItem(m_layout); it should work. (And the parenting will be OK as well, as the addItem() call will reparent m_layout correctly anyway.) Is this the same bug you're running into? Cheers, -- sebas http://www.kde.org | http://vizZzion.org | GPG Key ID: 9119 0EF9 signature.asc Description: This is a digitally signed message part. >> Visit http://mail.kde.org/mailman/listinfo/kde-devel#unsub to unsubscribe <<

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Re: Problem with QGraphicsLinearLayout

Looks like a problem I've run into as well, it's a bug in Qt: http://bugreports.qt.nokia.com/browse/QTBUG-6447 If you do QGraphicsLinearLayout* m_layout = new QGraphicsLinearLayout(this); m_outerLayout->addItem(m_layout); it'll crash, if you leave the parent out of the constructor: QGraphicsLinearLayout* m_layout = new QGraphicsLinearLayout; m_outerLayout->addItem(m_layout); it should work. (And the parenting will be OK as well, as the addItem() call will reparent m_layout correctly anyway.) Is this the same bug you're running into?Unfortunately reparenting or no parents at all didn't change the outcome.Here is my code: http://pastebin.com/fqszdrK0 - The layouts are initialized in the constructor- As soon as I uncomment line 57, the app crashes- At line 157 is the function that adds the widgets. At the moment it only adds to one layout, but this already causes it to crash if I enable another layout.  >> Visit http://mail.kde.org/mailman/listinfo/kde-devel#unsub to unsubscribe <<

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Re: A DBUS call for calling global shortcuts.

On 8 April 2010 00:12, Kelvie Wong <kelvie@xxxxxxxx> wrote: > On 7 April 2010 04:29, Eduardo Robles Elvira <edulix@xxxxxxxxx> wrote: >> On Tue, Apr 6, 2010 at 2:06 PM, Michael Jansen <kde@xxxxxxxxxxxxxxxxxx> >> wrote: >>> Hi >>> >>> Just my thought. But since i never reserve the right to veto any change >>> feel free to ignore them >>> >>> 1. I would really like to hear about use cases for that patch. Just because >>> we can do it doesn't >>> mean we should do it. In most use cases i can think of adding a dbus method >>> doXYZ to the >>> application's dbus interface is the better idea. You will know if the app >>> is running that way for >>> example. >> >> Hello: >> >> I have written a krunner runner for global shortcuts, but I haven't >> published it and kept it to myself instead because there was no easy >> way to trigger the shorcuts via dbus (the runner obtains the list of >> shortcuts also via dbus), so my runner only shows/filters for shortcut >> names and shortcut key combos but doesn't really trigger the >> shortcuts' actions, and that makes the runner quite incomplete. >> >> I would have written this patch myself at some point in time, but I >> for one welcome it (less work for me :D) and I think that the global >> shortcuts runner is a pretty good use case isn't it? :P Of course >> after this patch gets accepted, I'll publish the global shortcuts >> runner so that everyone can enjoy it =). >> >> Regards, >>   Eduardo Robles Elvira. >> >>>> Visit http://mail.kde.org/mailman/listinfo/kde-devel#unsub to unsubscribe >>>> << >> > > I was thinking of committing it as soon as I move it over to the right > D-Bus path.  Perhaps later this weekend. > > > -- > Kelvie Wong > Scratch that, this may have to wait until after exams (or during a study break). -- Kelvie Wong >> Visit http://mail.kde.org/mailman/listinfo/kde-devel#unsub to unsubscribe <<

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Re: A DBUS call for calling global shortcuts.

On Fri, Apr 16, 2010 at 5:47 AM, Kelvie Wong <kelvie@xxxxxxxx> wrote: > On 12 April 2010 13:07, Kelvie Wong <kelvie@xxxxxxxx> wrote: >> Scratch that, this may have to wait until after exams (or during a study >> break). >> >> -- >> Kelvie Wong >> > > It has been committed. r1115342 > > To call: > > qdbus org.kde.kglobalaccel /component/kwin > org.kde.kglobalaccel.Component.invokeShortcut ShowDesktopGrid > > -- > Kelvie Wong Nice! In return, I just committed a first version of the globalshortcuts runner in playground/base/plasma/runners/globalshortcuts ;-) Regards, Eduardo Robles Elvira. >> Visit http://mail.kde.org/mailman/listinfo/kde-devel#unsub to unsubscribe <<