Color selection components

12 Responses

1. 
   Ed Ross June 3, 2011 at 11:46 Reply

   This info is awesome. The Beans editor ColorPicker is exactly what I was looking for but it’s sure nice to have all those other options as well. Thanks for responding so quickly to my request!

2. 
   dhruv jain June 16, 2011 at 07:34 Reply

   thanks…..will be looking to paste question if i am not able to make a child components in parent gui………..really good one bydave…….

3. 
   Jesse dziedzic October 20, 2011 at 08:47 Reply

   Wonderful post!!

4. 
   Red Kim May 13, 2012 at 23:29 Reply

   Hi.
   I’m always find information in your Blog.
   ans also read this page. but I don’t know how to get color info
   in “com.mathworks.mlwidgets.graphics.ColorPicker”.
   I’d like get color info same to get “uigetcolor”.
   How to get it?
   and I’d like set default color…
   It like System Test Tool box “Plot – General”.

• 
  Yair Altman May 13, 2012 at 23:46 Reply

  @Kim –

  import com.mathworks.mlwidgets.graphics.ColorPicker cp = ColorPicker(ColorPicker.AUTO, ColorPicker.LINE_ICON, ''); [jcp,hcontainer] = javacomponent(cp,[],gcf); color = cp.getValue; % a java.awt.Color object color = cp.getValue.getColorComponents([])' * 255; % an [R,G,B] array of values

  import com.mathworks.mlwidgets.graphics.ColorPicker cp = ColorPicker(ColorPicker.AUTO, ColorPicker.LINE_ICON, ''); [jcp,hcontainer] = javacomponent(cp,[],gcf); color = cp.getValue; % a java.awt.Color object color = cp.getValue.getColorComponents([])' * 255; % an [R,G,B] array of values

  More information about ColorPicker, including its options and icons styles, can be found in section 5.4.1 of my Matlab-Java book.

• 
  Red Kim May 14, 2012 at 03:50 Reply

  Thank you so much!!
  It’s working now!
  Your amazing guy!!

5. 
   Ronin July 1, 2014 at 02:14 Reply

   Is it possible with some script or ui to edit the predefined colors that all the above mentioned color-selection tools seem to have in common? I personally dont ever use any other colors than given in the first 4 lines (white to black, red1… , red2…, and the one with green in it ). So the last 5 lines are just crap. Id really love to change them into more useful colors.

   Thanks in advance

• 
  Yair Altman July 2, 2014 at 09:51 Reply

  @ronin – I am not aware of a way to do this.

6. 
   Paul October 13, 2015 at 04:48 Reply

   Hi, I find your advice absolutely wonderful.
   However I can’t find a way to retrieve colour information from the com.mathworks.beans.editors.ColorPicker object (used as in example), even with your Red Kim answer.
   Would you have any idea why ?

• 
  Yair Altman October 13, 2015 at 12:58 Reply

  @Paul – you can use the following object methods to retrieve the com.mathworks.beans.editors.ColorPicker‘s selected color:
  
  * getBlue() % returns int
  * getGreen() % returns int
  * getRed() % returns int
  * getSelectedColor() % returns java.awt.Color
  

  Red Kim referred to a different ColorPicker class (that happens to have the same class name), but it’s a different class in a different package so of course it has different behavior.

7. 
   Meade February 22, 2017 at 18:14 Reply

   Yair,

   Another super useful post I’m just now finding!

   I have embedded this color picker within a context menu of a GUI I’ve built.
   My question is this:
   Is it possible to trigger a callback when the user clicks ‘OK’ in the widget?
   Using the code snippet you provided for @Red Kim, hopefully my intention is clear.

   Thanks so much for all the great insights.
   Best,
   meade

   import com.mathworks.mlwidgets.graphics.ColorPicker cp = ColorPicker(ColorPicker.AUTO, ColorPicker.LINE_ICON, ''); [jcp,hcontainer] = javacomponent(cp,[],gcf); % Need to trigger callback on selection here!   % function MyCallback(hObj,evt) color = cp.getValue; % a java.awt.Color object % This should be within the callback color = cp.getValue.getColorComponents([])' * 255; % an [R,G,B] array of values % Do something with the color % end %MyCallback

   import com.mathworks.mlwidgets.graphics.ColorPicker cp = ColorPicker(ColorPicker.AUTO, ColorPicker.LINE_ICON, ''); [jcp,hcontainer] = javacomponent(cp,[],gcf); % Need to trigger callback on selection here! % function MyCallback(hObj,evt) color = cp.getValue; % a java.awt.Color object % This should be within the callback color = cp.getValue.getColorComponents([])' * 255; % an [R,G,B] array of values % Do something with the color % end %MyCallback

• 
  meade March 3, 2017 at 21:28 Reply

  Yair,

  I figured out my request. Posting it here for anyone else who may be curious.

  Thanks again!
  Meade

  import com.mathworks.mlwidgets.graphics.ColorPicker cp = ColorPicker(ColorPicker.AUTO, ColorPicker.LINE_ICON, ''); [jcp,hcontainer] = javacomponent(cp,[],gcf);   % !! Here's the key bit... This will trigger when user picks a color & selects "OK" in widget set(jcp, 'ItemStateChangedCallback', {@MyCallback,gcf})     function MyCallback(hObj,evt,hFigure) color = cp.getValue; % a java.awt.Color object % This should be within the callback color = cp.getValue.getColorComponents([])' * 255; % an [R,G,B] array of values % Do something with the color end %MyCallback

  import com.mathworks.mlwidgets.graphics.ColorPicker cp = ColorPicker(ColorPicker.AUTO, ColorPicker.LINE_ICON, ''); [jcp,hcontainer] = javacomponent(cp,[],gcf); % !! Here's the key bit... This will trigger when user picks a color & selects "OK" in widget set(jcp, 'ItemStateChangedCallback', {@MyCallback,gcf}) function MyCallback(hObj,evt,hFigure) color = cp.getValue; % a java.awt.Color object % This should be within the callback color = cp.getValue.getColorComponents([])' * 255; % an [R,G,B] array of values % Do something with the color end %MyCallback

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<pre lang="matlab">
a = magic(3);
disp(sum(a))
</pre>

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