Android Question Question about the B4XSignatureTemplate

[Alex_197]

Hi all.

I have a question.

I know that we can add a date and time to the signature SignatureTemplate.AddDateAndTime. But what if need to add some comments, like a full name of the person or any other text? Is it possible?

Thanks

 

[TILogistic]

?I wanted to add more features.

Lienzo para firma electronica con el dedo

www.b4x.com

    'Set optional title before capturing the image.
        B4XSignature1.Title($"Signature: $DateTime{DateTime.Now}"$, xui.Color_Black, 20, True)
        
        'Test resize and base64 the image.
        Dim Base64 As String : Dim SU As StringUtils
        
        'Resize the length base64 to save.
        'For save in datbase column type text, varchar or blob.
        Base64 = SU.EncodeBase64(ImageToBytes(B4XSignature1.Bitmap.Resize(350, 350, True)))
        
        'Convert Base64 to Image
        ImageView1.SetImage(BytesToImage(SU.DecodeBase64(Base64)))

        'See Size and text the base64.
        Log($"Base64 Text: ${Base64}"$)

 

[Alex_197]

?I wanted to add more features.

Lienzo para firma electronica con el dedo

www.b4x.com

    'Set optional title before capturing the image.
        B4XSignature1.Title($"Signature: $DateTime{DateTime.Now}"$, xui.Color_Black, 20, True)
       
        'Test resize and base64 the image.
        Dim Base64 As String : Dim SU As StringUtils
       
        'Resize the length base64 to save.
        'For save in datbase column type text, varchar or blob.
        Base64 = SU.EncodeBase64(ImageToBytes(B4XSignature1.Bitmap.Resize(350, 350, True)))
       
        'Convert Base64 to Image
        ImageView1.SetImage(BytesToImage(SU.DecodeBase64(Base64)))

        'See Size and text the base64.
        Log($"Base64 Text: ${Base64}"$)

Thank you for your reply but I need it for B4A and V4i.

 

[TILogistic]

Thank you for your reply but I need it for B4A and V4i.

The B4XSignature class is cross-platform (B4J, B4A, B4i).

If desired, it can be packaged in a b4xlib (B4X) library.

 

[TILogistic]

Note: The class published in the post is version 1.0; later versions added more features, such as undo, redo, move, cut, etc.

B4A

Lienzo para firma electronica con el dedo

www.b4x.com

B4J

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www.b4x.com

I will soon publish the full version with the b4xlib library and examples.

In the new versions, signature smoothing algorithms were added to make it as realistic as possible.

Ref:

jSignature

jSignature is a signature capture applet made for browsers. It is written in JavaScript and supports many desktop and mobile browsers. It's so easy to use and integrate, you would have no excuse not to use it.

willowsystems.github.io

Algorithms:

jSignature

jSignature is a signature capture applet made for browsers. It is written in JavaScript and supports many desktop and mobile browsers. It's so easy to use and integrate, you would have no excuse not to use it.

willowsystems.github.io

DEMO WebView:

Signature Capturing with jSignature and WebViewExtras

Hi everyone: After several test, now I can use the jSignature javascript plugin I was using in my web, in my B4A app, in order to update my database from b4a the same way I'm doing in my web. I know there are some solutions to do this in B4A, but I need to do it this way because I was using it...

www.b4x.com

 

[TILogistic]

Thanks to @William Lancee , who was the inspiration for researching curve smoothing and other topics.

[B4X] Fitting a smooth curved line to a sequence of points

This simple technique was mentioned in this thread https://www.b4x.com/android/forum/threads/xchart-lib-dynamiclines-any-smoothing-option.143117/post-906813 It was not an appropriate solution for that thread, so I am presenting it here with a couple of examples where it is very effective. The...

www.b4x.com

 

[TILogistic]

And for decoding and encoding the image of the signatures, a class in B4X, without dependence on external libraries.

[B4X] Free version 1.0 code!! - B4XBase64 encode and decode: Made only with B4X code, without external libraries

B4XBase64 encoding and decoding algorithms were developed using B4X code only, without external libraries. Methods: . URL encoding and decoding . Image variable encoding and decoding . Text variable encoding and decoding . Image file encoding and decoding . Text file encoding and decoding ...

www.b4x.com