B4J Question How can one clear a clipped path of a canvas

Erel

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• Jun 10, 2015

• #2

Try:

B4X:

cnvs.DrawRect(0, 0, cnvs.Width, cnvs.Height, fx.Colors.Transparent, True, 0)

 

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V

VB6Back

Member

• Jun 10, 2015

• #3

Erel said:

Try:

B4X:

cnvs.DrawRect(0, 0, cnvs.Width, cnvs.Height, fx.Colors.Transparent, True, 0)

Click to expand...

Thanks Erel for your reply.

I tried the above but nothing is cleared from the canvas. If I use a non transparent color the clipped region is painted as expected.

Any other suggestion?

 

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Erel

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• Jun 11, 2015

• #4

I see it too. It seems like ClearRect doesn't work properly with the clipped regions.
The workaround will be to paint the background to the canvas instead.

 

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V

VB6Back

Member

• Jun 11, 2015

• #5

I tried the following with no effect:

B4X:

Sub ClearRegoin(cnvs As Canvas,Region As List)
   
    cnvs.ClipPath(Region)
'    cnvs.ClearRect(0,0,cnvs.Width,cnvs.Height)

    Dim p As Paint = fx.Colors.Transparent
    cnvs.DrawRect(0,0,cnvs.Width,cnvs.Height,p,True,1)

    cnvs.RemoveClip
   
End Sub

 

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Erel

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• Jun 12, 2015

• #6

It will not work as drawing a transparent color does nothing. As I wrote above you need to paint the background to the canvas.

 

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