ProgressBar draws 'progress' even when value is 0

[berkay2578]

Before all, I'm running version 1.51. ProgressBar draws an unexpected filled rectangle when the fraction value is 0 and style.FrameRounding is greater than 0.0f. This also happens with the default theme. I tried to fix it but I failed.

With FrameRounding:

Without FrameRounding:

gifs:
style.FrameRounding = 0.0f
style.FrameRounding > 0.0f

A dirty workaround for now is to use:
RenderFrame(bb.Min, fill_br, GetColorU32(ImGuiCol_PlotHistogram), false, fraction < 0.01f ? 0.0f : style.FrameRounding);

[berkay2578]

I have also noticed that the rectangle of ImGuiCol_PlotHistogram is drawn over the rectangle of ImGuiCol_FrameBg, this causes issues if you want both of the colours to have transparency. off-topic.

[ocornut]

I have also noticed that the rectangle of ImGuiCol_PlotHistogram is drawn over the rectangle of ImGuiCol_FrameBg, this causes issues if you want both of the colours to have transparency.

Most things in imgui are drawn over the FrameBg color, that's the desired platforms. Your solution wouldn't easily be applicable to widgets like PlotHistogram(), etc.

I'll look at how we can fix your first issue above.

(sorry about the gfycat links)

Please use github attachment and no external link when possible, else the links will end up failing in the future, making things harder to refer to for others.

[berkay2578]

Most things in imgui are drawn over the FrameBg color, that's the desired platforms. Your solution wouldn't easily be applicable to widgets like PlotHistogram(), etc.

Yeah, I know, it's for extreme situations like mine where I'm using it to draw a digital speedometer with the RPM value as the background. I'll just remove the code since it's off-topic.

Please use github attachment and no external link when possible, else the links will end up failing in the future, making things harder to refer to for others.

Noted, I've edited the main post to have images of the issue.

[ocornut]

Yeah, I know, it's for extreme situations like mine where I'm using it to draw a digital speedometer with the RPM value as the background.

That function is literally 2 calls to RenderFrame() which is 1 call to draw_list->AddRectFilled(), if you are doing custom rendering you'd probably be better just doing the calls yourself instead of relying on ProgressBar.

Looking at the rendering.

[ocornut]

This should be fixed now (with quite some pain to get the rendering right - but the resulting function will be useful for other stuff).