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Drawing to WindowOutput
Posted: Tue Nov 15, 2016 7:50 pm
by WilliamL
Should this code work? I get a gray window.
Code: Select all
If OpenWindow(0, 0, 0, 200, 200, "2DDrawing Example", #PB_Window_SystemMenu | #PB_Window_ScreenCentered)
If StartDrawing(WindowOutput(0))
y = 0
For x = 0 To 95 Step 10
Box(x, y, 200-2*x, 200-2*y, RGB(Random(255), Random(255), Random(255)))
y + 10 ; the same as y = y + 10
Next x
StopDrawing()
EndIf
Repeat
Event = WaitWindowEvent()
Until Event = #PB_Event_CloseWindow
EndIf
Re: Drawing to WindowOutput
Posted: Wed Nov 16, 2016 1:54 am
by fsw
Confirmed.
In the documentation all the examples for WindowOutput() do not work.
Drawing on an Image or on a Screen work...
Sierra, Xcode 8, PB 5.5
Re: Drawing to WindowOutput
Posted: Wed Nov 16, 2016 3:10 am
by Keya
confirmed also on El Capitan, so its seemingly not just a Sierra thing
Re: Drawing to WindowOutput
Posted: Wed Nov 16, 2016 1:03 pm
by Wolfram
Workaround:
Code: Select all
If OpenWindow(0, 0, 0, 200, 200, "2DDrawing Example", #PB_Window_SystemMenu | #PB_Window_ScreenCentered)
Repeat
Until WaitWindowEvent() = 4
If StartDrawing(WindowOutput(0))
y = 0
For x = 0 To 95 Step 10
Box(x, y, 200-2*x, 200-2*y, RGB(Random(255), Random(255), Random(255)))
y + 10 ; the same as y = y + 10
Next x
StopDrawing()
EndIf
Repeat
Event = WaitWindowEvent()
Until Event = #PB_Event_CloseWindow
EndIf
Re: Drawing to WindowOutput
Posted: Wed Nov 16, 2016 6:45 pm
by fsw
Wolfram wrote:Workaround:
Confirmed
So is event "4" the Cocoa "drawing event" or the "view did load" event?
Re: Drawing to WindowOutput
Posted: Wed Nov 16, 2016 6:47 pm
by WilliamL
Good one Wolfram. That works but I have no idea why.
Maybe this should be moved to the 'Bugs - Mac OSX' forum...
Re: Drawing to WindowOutput
Posted: Wed Nov 16, 2016 6:48 pm
by fsw
Really hope the next PureBasic version comes with updated macOS functionality
Fred, let me know when you need macOS alpha testers
Re: Drawing to WindowOutput
Posted: Wed Nov 16, 2016 9:10 pm
by freak
You can't just draw to a window once and expect it to stay there. You have to watch for the #PB_Event_Repaint and redraw every time. This is the same on all OS.
Re: Drawing to WindowOutput
Posted: Wed Nov 16, 2016 10:05 pm
by WilliamL
Well, there's the answer. I don't know why I didn't think of that?! (not serious) I guess if the drawing had appeared even once I might have gotten the re-draw idea.
So, in Wolfram's example, WaitWindowEvent() = 4 must the the #PB_Event_Repaint.
...not a bug and thanks to freak for an answer.
[later]
ok, I found the info in the Help file under 'WindowOutput' and it is pretty clear how it works (never saw it before-thanks fsw)
Re: Drawing to WindowOutput
Posted: Wed Nov 16, 2016 10:11 pm
by fsw
freak wrote:You can't just draw to a window once and expect it to stay there. You have to watch for the #PB_Event_Repaint and redraw every time. This is the same on all OS.
OK.
The documentation of WindowOutput() needs to be fixed.
In the example the "#" of "#PB_Event_Repaint" is missing...