SimpleButtonMorph class comment


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Last updated at 12:53 am UTC on 17 January 2006

Edit SimpleButtonMorph class comment here. Some of this taken from below.

See: SimpleButtonMorph

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I am labeled, rectangular morph which allows the user to click me. I can be configured to send my "target" the message "actionSelector" with "arguments" when I am clicked. I may have a label, implemented as a StringMorph.

SimpleButtonMorph new
target: Smalltalk;
label: 'Beep!';
actionSelector: #beep;
openInWorld

Structure:

instance var
- Type
  - Description
target
- Object
  - The Object to notify upon a click
actionSelector
- Symbol
  - The message to send to Target (#messageName)
arguments
- Array
  - Arguments to send with #actionSelection (optional)
actWhen
- Symbol
  - When to take action: may be #buttonUp (default), #buttonDown, #whilePressed, or #startDrag
oldColor
- Color
  - Used to restore color after click

Another example: a button which quits the image without saving it.

SimpleButtonMorph new
target: Smalltalk;
label: 'quit';
actionSelector: #snapshot:andQuit:;
arguments: (Array with: false with: true);
openInWorld