Clearing a CanvasGadget

[marcoagpinto]

It sounded to me as if you would draw and then clear, both in a single drawing block, that's why I asked. But just clear and draw makes sense though . Any reason why you don't use a screen?

I can't use a screen because it has a GUI with a toolbar, status bar and menus.

[#NULL]

You can use a windowed screen in combination with other gui controls. The Doc for OpenWindowedScreen() even has examples for this.

[Josh]

@Fred:
Could you implement a function in PB to clear a canvas?
ClearCanvasGadget(gadget, colour)

This is already implemented and is called SetGadgetColor()
Look at my posting from 17.01.2019 20:47 in this thread.

I think there's a problem in Pb. Try the following code with and without the MessageRequester line

Code: Select all

OpenWindow   (0, 0, 0, 600, 600, "Test")
CanvasGadget (0, 0, 0, 500, 500)

;MessageRequester ("", "")

StartDrawing (CanvasOutput(0))
  DrawText (10, 10, "TEST", #Yellow, #Blue)
StopDrawing ()

SetGadgetColor (0, #PB_Gadget_BackColor, #Yellow)


Repeat : Until WaitWindowEvent() = #PB_Event_CloseWindow

[#NULL]

I think there's a problem in Pb. Try the following code with and without the MessageRequester line

Can you explain what you get? I don't see anything unusual, but I'm on Linux.

[RASHAD]

Code: Select all

OpenWindow   (0, 0, 0, 600, 600, "Test")
CanvasGadget (0, 0, 0, 500, 500)

MessageRequester ("", "")

StartDrawing (CanvasOutput(0))
  DrawText (10, 10, "TEST", #Yellow, #Blue)
StopDrawing ()

HideGadget(0,1)
SetGadgetColor (0, #PB_Gadget_BackColor, #Yellow)
HideGadget(0,0)


Repeat : Until WaitWindowEvent() = #PB_Event_CloseWindow