Android Question How does one change signature template pen color without erasing the drawing on signature template

IndieDev · Jun 8, 2020

Hi,

Been trying to change the pen color for the B4XSignatureTemplate, like below.

B4XSignatureTemplate pen color change:

Sub Btn_Color_Click
    Wait For (Dialog.ShowTemplate(ColorTemplate, "OK", "", "CANCEL")) Complete (Result As Int)
    If Result = xui.DialogResponse_Positive Then
        SignatureTemplate.StrokeColor = ColorTemplate.SelectedColor
        DrawPad        ' display the Signature template again
    End If
End Sub

Sub Btn_Erase_Click
    '???
End Sub

But the earlier drawing on Signature template disappears, since I'm reloading the template.
How do I do this?

Also, how do I erase the current drawing?
Can we do something like an "Eraser" effect?

Erel · Jun 8, 2020

IndieDev said:
Also, how do I erase the current drawing?
Can we do something like an "Eraser" effect?

There is no built-in erasing feature. You can take the color template source code, rename it and create your own template.

IndieDev said:
Been trying to change the pen color for the B4XSignatureTemplate, like below.

This cannot work as the lines were already drawn.
You can use BitmapColorEffects.ReplaceColor for this.

IndieDev · Jun 8, 2020

Erel said:
There is no built-in erasing feature. You can take the color template source code, rename it and create your own template.

OK. It will be a challenge for me.... ?
But I'll try....

This cannot work as the lines were already drawn.
You can use BitmapColorEffects.ReplaceColor for this.

Then I think I'll use 4 buttons to select the primary colors + black.
I had seen someone do similarly, somewhere in the forum....

At least, this way, the strokecolor can be changed immediately.

B4X:

SignatureTemplate.StrokeColor = Colors.Red

Android Question How does one change signature template pen color without erasing the drawing on signature template

IndieDev

Active Member

Erel

B4X founder

IndieDev

Active Member

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Android Question How does one change signature template pen color without erasing the drawing on signature template

IndieDev

Active Member

Erel

B4X founder

IndieDev

Active Member

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