RE: [PyQt] Collapse/expand frame
I have used created these types of collapsible frames before and keeping them inside a scroll area. It flickers on all platforms (Win, Linux, and OSX) and all the versions of Qt between 3 and 4.3. In short, hiding/exposing widgets in a scroll area will always flicker. I was hopeful the Qt switch to client-side windows in 4.5 would fix the flickering, but from what I've heard it does not. -Original Message- From: pyqt-boun...@riverbankcomputing.com [mailto:pyqt-boun...@riverbankcomputing.com] On Behalf Of Alexei Puzikov Sent: Wednesday, August 19, 2009 9:59 PM To: Hans-Peter Jansen Cc: pyqt@riverbankcomputing.com Subject: Re: [PyQt] Collapse/expand frame I've done some testing. The majour problem here seems to be QVBoxLayout is sending resizeEvent (or doing something else that sends such event) to all the children widgets that has their own Layouts. And this causes flickering. Anybody can figure out why? A. On Fri, Aug 14, 2009 at 11:50 PM, Hans-Peter Jansen wrote: > Am Freitag, 14. August 2009 schrieb Alexei Puzikov: >> >> Actually, you do, as soon as you'll pass over some amount of controls. >> >> >> >> I have the editor here that reimplements the screenshot (it's Maya, >> >> btw) and in worst situations contains approx. 4500 controls. And I'm >> >> still unable to remove >> >> flickering on switch - basically, the layout refresh. >> >> >> >> If anybody can prototype something that works with big amount of >> >> controls - his help would be enormous. Really. >> > >> > Hmm, Alexei, please don't feel offended, but presenting 4500 controls >> > to user basically sounds like a pathologic situation, where _concepts_ >> > lost control ;-)... >> >> Well, it's probably Friday evening fluctuated my math a little bit - >> so, in worst case, >> it's 1500 controls. Which is actually pretty easy to achieve: 2 >> spacers, label, editor and slider >> for each parameter. > > Ahh, okay, we're talking about 500 composite widgets then - which is where > things start to get imaginable ;-) > >> > How is a user supposed to master that? Something similar to >> > car navigation for the screen? (Take the second branch right, move >> > mouse 200mm north, you reached your target, it's on the left side..) >> >> Well, that's what makes my job interesting :) Yes, it's a tough UI >> stuff. Filtering, proper >> grouping, good usable search, tagging, good documentation and most of >> all - good default values :) >> >> > Even, if that widget, or control, if you like, is implemented in C++, >> > as long as it is resizing itself, flickering cannot be suppressed, >> > since it forces Qt to redraw the whole frame. I would start looking, >> > how to get the whole thing into managable pieces. Next you may try to >> > use a home grown layout manager, that is optimized for these cases >> > (e.g. moves screen areas, but that's going to be tough, don't it?) >> >> I'm not sure. What actually bugs me is that layout engine is >> repainting the widgets >> that's haven't changed their geometry. Given how many layouts I have, >> this flickers >> >> You think this might be overwritten?... > > What I had in mind was a layout manager, that's being aware of the > situation: repaint only small screen areas (the widget, that is resizing > itself), and copying the unchanged screen areas around, its doable but > that's going to be a tough job, I assume. > > Pete > ___ PyQt mailing listPyQt@riverbankcomputing.com http://www.riverbankcomputing.com/mailman/listinfo/pyqt ___ PyQt mailing listPyQt@riverbankcomputing.com http://www.riverbankcomputing.com/mailman/listinfo/pyqt
Re: [PyQt] Collapse/expand frame
I've done some testing. The majour problem here seems to be QVBoxLayout is sending resizeEvent (or doing something else that sends such event) to all the children widgets that has their own Layouts. And this causes flickering. Anybody can figure out why? A. On Fri, Aug 14, 2009 at 11:50 PM, Hans-Peter Jansen wrote: > Am Freitag, 14. August 2009 schrieb Alexei Puzikov: >> >> Actually, you do, as soon as you'll pass over some amount of controls. >> >> >> >> I have the editor here that reimplements the screenshot (it's Maya, >> >> btw) and in worst situations contains approx. 4500 controls. And I'm >> >> still unable to remove >> >> flickering on switch - basically, the layout refresh. >> >> >> >> If anybody can prototype something that works with big amount of >> >> controls - his help would be enormous. Really. >> > >> > Hmm, Alexei, please don't feel offended, but presenting 4500 controls >> > to user basically sounds like a pathologic situation, where _concepts_ >> > lost control ;-)... >> >> Well, it's probably Friday evening fluctuated my math a little bit - >> so, in worst case, >> it's 1500 controls. Which is actually pretty easy to achieve: 2 >> spacers, label, editor and slider >> for each parameter. > > Ahh, okay, we're talking about 500 composite widgets then - which is where > things start to get imaginable ;-) > >> > How is a user supposed to master that? Something similar to >> > car navigation for the screen? (Take the second branch right, move >> > mouse 200mm north, you reached your target, it's on the left side..) >> >> Well, that's what makes my job interesting :) Yes, it's a tough UI >> stuff. Filtering, proper >> grouping, good usable search, tagging, good documentation and most of >> all - good default values :) >> >> > Even, if that widget, or control, if you like, is implemented in C++, >> > as long as it is resizing itself, flickering cannot be suppressed, >> > since it forces Qt to redraw the whole frame. I would start looking, >> > how to get the whole thing into managable pieces. Next you may try to >> > use a home grown layout manager, that is optimized for these cases >> > (e.g. moves screen areas, but that's going to be tough, don't it?) >> >> I'm not sure. What actually bugs me is that layout engine is >> repainting the widgets >> that's haven't changed their geometry. Given how many layouts I have, >> this flickers >> >> You think this might be overwritten?... > > What I had in mind was a layout manager, that's being aware of the > situation: repaint only small screen areas (the widget, that is resizing > itself), and copying the unchanged screen areas around, its doable but > that's going to be a tough job, I assume. > > Pete > ___ PyQt mailing listPyQt@riverbankcomputing.com http://www.riverbankcomputing.com/mailman/listinfo/pyqt
Re: [PyQt] Collapse/expand frame
Am Freitag, 14. August 2009 schrieb Alexei Puzikov: > >> Actually, you do, as soon as you'll pass over some amount of controls. > >> > >> I have the editor here that reimplements the screenshot (it's Maya, > >> btw) and in worst situations contains approx. 4500 controls. And I'm > >> still unable to remove > >> flickering on switch - basically, the layout refresh. > >> > >> If anybody can prototype something that works with big amount of > >> controls - his help would be enormous. Really. > > > > Hmm, Alexei, please don't feel offended, but presenting 4500 controls > > to user basically sounds like a pathologic situation, where _concepts_ > > lost control ;-)... > > Well, it's probably Friday evening fluctuated my math a little bit - > so, in worst case, > it's 1500 controls. Which is actually pretty easy to achieve: 2 > spacers, label, editor and slider > for each parameter. Ahh, okay, we're talking about 500 composite widgets then - which is where things start to get imaginable ;-) > > How is a user supposed to master that? Something similar to > > car navigation for the screen? (Take the second branch right, move > > mouse 200mm north, you reached your target, it's on the left side..) > > Well, that's what makes my job interesting :) Yes, it's a tough UI > stuff. Filtering, proper > grouping, good usable search, tagging, good documentation and most of > all - good default values :) > > > Even, if that widget, or control, if you like, is implemented in C++, > > as long as it is resizing itself, flickering cannot be suppressed, > > since it forces Qt to redraw the whole frame. I would start looking, > > how to get the whole thing into managable pieces. Next you may try to > > use a home grown layout manager, that is optimized for these cases > > (e.g. moves screen areas, but that's going to be tough, don't it?) > > I'm not sure. What actually bugs me is that layout engine is > repainting the widgets > that's haven't changed their geometry. Given how many layouts I have, > this flickers > > You think this might be overwritten?... What I had in mind was a layout manager, that's being aware of the situation: repaint only small screen areas (the widget, that is resizing itself), and copying the unchanged screen areas around, its doable but that's going to be a tough job, I assume. Pete ___ PyQt mailing listPyQt@riverbankcomputing.com http://www.riverbankcomputing.com/mailman/listinfo/pyqt
Re: [PyQt] Collapse/expand frame
>> Actually, you do, as soon as you'll pass over some amount of controls. >> >> I have the editor here that reimplements the screenshot (it's Maya, btw) >> and in worst situations contains approx. 4500 controls. And I'm still >> unable to remove >> flickering on switch - basically, the layout refresh. >> >> If anybody can prototype something that works with big amount of controls >> - his help would be enormous. Really. > > Hmm, Alexei, please don't feel offended, but presenting 4500 controls to > user basically sounds like a pathologic situation, where _concepts_ lost > control ;-)... Well, it's probably Friday evening fluctuated my math a little bit - so, in worst case, it's 1500 controls. Which is actually pretty easy to achieve: 2 spacers, label, editor and slider for each parameter. > How is a user supposed to master that? Something similar to > car navigation for the screen? (Take the second branch right, move mouse > 200mm north, you reached your target, it's on the left side..) Well, that's what makes my job interesting :) Yes, it's a tough UI stuff. Filtering, proper grouping, good usable search, tagging, good documentation and most of all - good default values :) > Even, if that widget, or control, if you like, is implemented in C++, as > long as it is resizing itself, flickering cannot be suppressed, since it > forces Qt to redraw the whole frame. I would start looking, how to get the > whole thing into managable pieces. Next you may try to use a home grown > layout manager, that is optimized for these cases (e.g. moves screen areas, > but that's going to be tough, don't it?) I'm not sure. What actually bugs me is that layout engine is repainting the widgets that's haven't changed their geometry. Given how many layouts I have, this flickers You think this might be overwritten?... A. ___ PyQt mailing listPyQt@riverbankcomputing.com http://www.riverbankcomputing.com/mailman/listinfo/pyqt
Re: [PyQt] Collapse/expand frame
Am Freitag, 14. August 2009 schrieb Scott Ballard: > Thanks for all the feedback. Are there any good tutorials for > implementing your own custom widgets/layouts? (if no one has an > implementation of this) Here is one: http://doc.trolltech.com/qq/qq26-pyqtdesigner.html and another: http://diotavelli.net/PyQtWiki/Using_Python_Custom_Widgets_in_Qt_Designer One downside of subclassing QWidget is the layout manager from Mac OS-X using maximum spacing around it, see "my" thread: QStyle manipulations. If you're not targetting that OS, you don't need to care. > Cheers, > -Scott > > Alexei Puzikov wrote: > I'm really looking for a frame that has the collapse/expand ability > built into it. See the image in the link. You can see the Texture Map > submenu collapsed/expanded. Any thoughts? > > www.scottballard.net/collapsibleFrame.jpg > > I see - why don't you BYO. This kind of widget is uncommon, and thus the > reason not being available already. > > But it's pretty easy to combine basic widgets to a composite one. And due > to Qts powerful layout machinery, you mostly don't need to care about the > implicit widget resize. > > > Actually, you do, as soon as you'll pass over some amount of controls. > > I have the editor here that reimplements the screenshot (it's Maya, btw) > and in worst situations contains approx. 4500 controls. And I'm still > unable to remove > flickering on switch - basically, the layout refresh. > > If anybody can prototype something that works with big amount of controls > - his help would be enormous. Really. Hmm, Alexei, please don't feel offended, but presenting 4500 controls to user basically sounds like a pathologic situation, where _concepts_ lost control ;-)... How is a user supposed to master that? Something similar to car navigation for the screen? (Take the second branch right, move mouse 200mm north, you reached your target, it's on the left side..) Even, if that widget, or control, if you like, is implemented in C++, as long as it is resizing itself, flickering cannot be suppressed, since it forces Qt to redraw the whole frame. I would start looking, how to get the whole thing into managable pieces. Next you may try to use a home grown layout manager, that is optimized for these cases (e.g. moves screen areas, but that's going to be tough, don't it?) Pete ___ PyQt mailing listPyQt@riverbankcomputing.com http://www.riverbankcomputing.com/mailman/listinfo/pyqt
Re: [PyQt] Collapse/expand frame
Thanks for all the feedback. Are there any good tutorials for implementing your own custom widgets/layouts? (if no one has an implementation of this) Cheers, -Scott Alexei Puzikov wrote: I'm really looking for a frame that has the collapse/expand ability built into it. See the image in the link. You can see the Texture Map submenu collapsed/expanded. Any thoughts? www.scottballard.net/collapsibleFrame.jpg I see - why don't you BYO. This kind of widget is uncommon, and thus the reason not being available already. But it's pretty easy to combine basic widgets to a composite one. And due to Qts powerful layout machinery, you mostly don't need to care about the implicit widget resize. Actually, you do, as soon as you'll pass over some amount of controls. I have the editor here that reimplements the screenshot (it's Maya, btw) and in worst situations contains approx. 4500 controls. And I'm still unable to remove flickering on switch - basically, the layout refresh. If anybody can prototype something that works with big amount of controls - his help would be enormous. Really. A. __ Information from ESET NOD32 Antivirus, version of virus signature database 4333 (20090813) __ The message was checked by ESET NOD32 Antivirus. http://www.eset.com __ Information from ESET NOD32 Antivirus, version of virus signature database 4333 (20090813) __ The message was checked by ESET NOD32 Antivirus. http://www.eset.com ___ PyQt mailing listPyQt@riverbankcomputing.com http://www.riverbankcomputing.com/mailman/listinfo/pyqt
Re: [PyQt] Collapse/expand frame
>> I'm really looking for a frame that has the collapse/expand ability >> built into it. See the image in the link. You can see the Texture Map >> submenu collapsed/expanded. Any thoughts? >> >> www.scottballard.net/collapsibleFrame.jpg > > I see - why don't you BYO. This kind of widget is uncommon, and thus the > reason not being available already. > > But it's pretty easy to combine basic widgets to a composite one. And due to > Qts powerful layout machinery, you mostly don't need to care about the > implicit widget resize. Actually, you do, as soon as you'll pass over some amount of controls. I have the editor here that reimplements the screenshot (it's Maya, btw) and in worst situations contains approx. 4500 controls. And I'm still unable to remove flickering on switch - basically, the layout refresh. If anybody can prototype something that works with big amount of controls - his help would be enormous. Really. A. ___ PyQt mailing listPyQt@riverbankcomputing.com http://www.riverbankcomputing.com/mailman/listinfo/pyqt
Re: [PyQt] Collapse/expand frame
Well - have you tried to do that with 1500 controls? A. On Fri, Aug 14, 2009 at 9:24 AM, Håvard Gulldahl wrote: > On Thu, Aug 13, 2009 at 7:51 PM, Scott Ballard wrote: >> I'm really looking for a frame that has the collapse/expand ability built >> into it. See the image in the link. You can see the Texture Map submenu >> collapsed/expanded. Any thoughts? >> >> www.scottballard.net/collapsibleFrame.jpg >> > > I've done something similar, sans the arrow. I have a checkable > QGroupBox, whose sole child is a QFrame with no borders. All the > widgets I put into the QFrame. Then I connect the toggled(bool) signal > of the group box to the frame's setShown(bool) slot. That way, the > QFrame is hidden when the QGroupBox is un-checked. And you can do it > all from the Qt Designer: less hand-written code, yay! > > Originally I meant to figure out how to customize the QGroupBox so > that it has an arrow (like in the example you're referencing) and not > a cross, but it's not high on the list. The check box works fine, IMO. > > Cheers, > > Håvard > > >> Many thanks! >> -Scott >> >> >> Hans-Peter Jansen wrote: >>> >>> Am Mittwoch, 12. August 2009 schrieb Scott Ballard: >>> Does anyone know of a way to collapse/expand a frame or a group box that contains widgets in it? I don't see anything in the docs or Google about it, but it would seem like something common. >>> >>> Try .hide()/.show() resp. .setVisible(bool) >>> >>> Pete >>> ___ >>> PyQt mailing list p...@riverbankcomputing.com >>> http://www.riverbankcomputing.com/mailman/listinfo/pyqt >>> >>> __ Information from ESET NOD32 Antivirus, version of virus >>> signature database 4330 (20090812) __ >>> >>> The message was checked by ESET NOD32 Antivirus. >>> >>> http://www.eset.com >>> >>> >>> >>> >>> >> >> >> __ Information from ESET NOD32 Antivirus, version of virus signature >> database 4332 (20090813) __ >> >> The message was checked by ESET NOD32 Antivirus. >> >> http://www.eset.com >> >> >> ___ >> PyQt mailing list p...@riverbankcomputing.com >> http://www.riverbankcomputing.com/mailman/listinfo/pyqt >> > > > > -- > Håvard Gulldahl > Telefon: 9971 0615 > http://lurtgjort.no/ > > ___ > PyQt mailing list p...@riverbankcomputing.com > http://www.riverbankcomputing.com/mailman/listinfo/pyqt > ___ PyQt mailing listPyQt@riverbankcomputing.com http://www.riverbankcomputing.com/mailman/listinfo/pyqt
Re: [PyQt] Collapse/expand frame
On Thu, Aug 13, 2009 at 7:51 PM, Scott Ballard wrote: > I'm really looking for a frame that has the collapse/expand ability built > into it. See the image in the link. You can see the Texture Map submenu > collapsed/expanded. Any thoughts? > > www.scottballard.net/collapsibleFrame.jpg > I've done something similar, sans the arrow. I have a checkable QGroupBox, whose sole child is a QFrame with no borders. All the widgets I put into the QFrame. Then I connect the toggled(bool) signal of the group box to the frame's setShown(bool) slot. That way, the QFrame is hidden when the QGroupBox is un-checked. And you can do it all from the Qt Designer: less hand-written code, yay! Originally I meant to figure out how to customize the QGroupBox so that it has an arrow (like in the example you're referencing) and not a cross, but it's not high on the list. The check box works fine, IMO. Cheers, Håvard > Many thanks! > -Scott > > > Hans-Peter Jansen wrote: >> >> Am Mittwoch, 12. August 2009 schrieb Scott Ballard: >> >>> >>> Does anyone know of a way to collapse/expand a frame or a group box that >>> contains widgets in it? I don't see anything in the docs or Google about >>> it, but it would seem like something common. >>> >> >> Try .hide()/.show() resp. .setVisible(bool) >> >> Pete >> ___ >> PyQt mailing list p...@riverbankcomputing.com >> http://www.riverbankcomputing.com/mailman/listinfo/pyqt >> >> __ Information from ESET NOD32 Antivirus, version of virus >> signature database 4330 (20090812) __ >> >> The message was checked by ESET NOD32 Antivirus. >> >> http://www.eset.com >> >> >> >> >> > > > __ Information from ESET NOD32 Antivirus, version of virus signature > database 4332 (20090813) __ > > The message was checked by ESET NOD32 Antivirus. > > http://www.eset.com > > > ___ > PyQt mailing list p...@riverbankcomputing.com > http://www.riverbankcomputing.com/mailman/listinfo/pyqt > -- Håvard Gulldahl Telefon: 9971 0615 http://lurtgjort.no/ ___ PyQt mailing listPyQt@riverbankcomputing.com http://www.riverbankcomputing.com/mailman/listinfo/pyqt
Re: [PyQt] Collapse/expand frame
Am Donnerstag, 13. August 2009 schrieb Scott Ballard: > I'm really looking for a frame that has the collapse/expand ability > built into it. See the image in the link. You can see the Texture Map > submenu collapsed/expanded. Any thoughts? > > www.scottballard.net/collapsibleFrame.jpg I see - why don't you BYO. This kind of widget is uncommon, and thus the reason not being available already. But it's pretty easy to combine basic widgets to a composite one. And due to Qts powerful layout machinery, you mostly don't need to care about the implicit widget resize. Custom composite widgets have some pitfalls in the details, but just start over, we will help you getting through. Pete ___ PyQt mailing listPyQt@riverbankcomputing.com http://www.riverbankcomputing.com/mailman/listinfo/pyqt
Re: [PyQt] Collapse/expand frame
I'm really looking for a frame that has the collapse/expand ability built into it. See the image in the link. You can see the Texture Map submenu collapsed/expanded. Any thoughts? www.scottballard.net/collapsibleFrame.jpg Many thanks! -Scott Hans-Peter Jansen wrote: Am Mittwoch, 12. August 2009 schrieb Scott Ballard: Does anyone know of a way to collapse/expand a frame or a group box that contains widgets in it? I don't see anything in the docs or Google about it, but it would seem like something common. Try .hide()/.show() resp. .setVisible(bool) Pete ___ PyQt mailing listPyQt@riverbankcomputing.com http://www.riverbankcomputing.com/mailman/listinfo/pyqt __ Information from ESET NOD32 Antivirus, version of virus signature database 4330 (20090812) __ The message was checked by ESET NOD32 Antivirus. http://www.eset.com __ Information from ESET NOD32 Antivirus, version of virus signature database 4332 (20090813) __ The message was checked by ESET NOD32 Antivirus. http://www.eset.com ___ PyQt mailing listPyQt@riverbankcomputing.com http://www.riverbankcomputing.com/mailman/listinfo/pyqt
Re: [PyQt] Collapse/expand frame
Am Mittwoch, 12. August 2009 schrieb Scott Ballard: > Does anyone know of a way to collapse/expand a frame or a group box that > contains widgets in it? I don't see anything in the docs or Google about > it, but it would seem like something common. Try .hide()/.show() resp. .setVisible(bool) Pete ___ PyQt mailing listPyQt@riverbankcomputing.com http://www.riverbankcomputing.com/mailman/listinfo/pyqt
