How to switch a bitmap image between transparent and opaque.

[kweisi50]

Hi,

I have small bitmap in a window, which normally I would like it appear to be transparent (invisible) but when a flag is set to become fully opaque, when the flag is cleared go back to being fully transparent.

Kind Regards

MikeZ

[eng23 · Accepted solution]

Hi,

Have you tried "imageX.setVisible(flag);" ?

[Martin KJELDSEN]

Hi @kweisi50​,

You can either use setVisible(), as suggested by @eng23​, or use setAlpha():

//Set invisible
image.setAlpha(0); 
image.setVisible(false);
 
//Set fully visible
image.setAlpha(255); 
image.setVisible(true);

[kweisi50]

Hi Martin/eng23,

Sorry for the delay in replying, thanks for you solution.

MikeZ

[Martin KJELDSEN]

You're welcome!