Animated GUI

[Whirly]

Hi,

This is the first time I use CEGUI (with OGRE as the 3D engine). Recently I stumbled accross a problem and I wanted to share how I solved it and then ask a question.

Well my designer wanted that in the application we have a mimic of the windows taskbar for our windows. So I implemented several news widgets (Taskbar, TaskbarButton and an extended FrameWindows with minimize button) into my own custom look.

Everything was ok but then I needed to implement the minimize effect. So I went through de documentation and did not see any mechanism to ask for a refresh each frame except the requestRedraw call. I added then the requestRedraw in my drawing code but it was doing nothing. I gave a look at the CEGUI code and saw that (in the CEGUISystem.cpp file):

[font=Courier]
if (d_gui_redraw)
{
d_renderer->resetZValue();
d_renderer->setQueueingEnabled(true);
d_renderer->clearRenderList();

if (d_activeSheet != NULL)
{
d_activeSheet->render();
}

d_gui_redraw = false;
}
[/font]

Ok I see the problem, I change to this

[font=Courier]
if (d_gui_redraw)
{
d_gui_redraw = false; // this is the moved line

d_renderer->resetZValue();
d_renderer->setQueueingEnabled(true);
d_renderer->clearRenderList();

if (d_activeSheet != NULL)
{
d_activeSheet->render();
}
}
[/font]

Basically the redraw flag was resetted at the end of the drawing and not before we draw everything (that's why requestRedraw from a draw was without effect).

My question is to know if there was a reason why it was only resetted at the end ? Or is it just that nobody was silly enough to request a redraw in the draw code ?

[CrazyEddie]

Whirly wrote:
Or is it just that nobody was silly enough to request a redraw in the draw code ?

Yes, that's it exactly

This is something that should not have any ill effects for anyone, so this should get updated to allow the behaviour you describe (that is, clearing the flag first).

[spesho]

Hi, while trying to implement drawing animated button (anim on top) i faced the same issue. Note that im using CeGUI#, but the code fragment in c# is a twin. Funy to realize that nobody ever tried RequestRedraw

Anyway, note that it is still not changed in CEGUI svn. Please, change!
fiee: CEGUISystem.cpp line:359