Automatically initializing a Radio Button

[ccoupe]

Was shoes/shoes-deprecated#167

[ccoupe]

Editted : Mar 16, 2014
There are several issues with Radio buttons.

Shoes.app do
  stack do
    flow {
      @r1 = radio :group, checked: true
      para "one"
    }
    flow {@r2 = radio :group; para "two"}
    para "================"
    flow { # horizontal grouping
      @r3 = radio :newgrp; para "near"
      @r4 = radio :newgrp; para "far"
    }
    @r4.checked = true 
    start { 
      para "checked one = #{@r1.checked?}\n" 
      para "checked far = #{@r4.checked?}\n"
    }
    button "Now check" do
      para "One: #{@r1.checked?}\n"
      para "Two: #{@r2.checked?}\n"
      para "near: #{@r3.checked?}\n"
      para "far: #{@r4.checked?}\n"
    end
  end
end

OSX lumps all radios into one group. Cocoa is not told to use different groups. But, ruby.c attempts to to manage it ( #define FORCE_RADIO).

It may not be possible to have more than one radio group per window on OSX. Groups need NSRadioMatrix handling which assume you know the NSRect which Shoes doesn't know and the matrix dimensions which we also don't know. Can it all be dynamically adjusted? Probably. Easy? No.

One other problem: On OSX, The start {} doesn't display until the button is pushed. That might be an unrelated bug.

[ccoupe]

ruby.c handles the groups and setting the buttons off and on just fine. It's osx that thinks all buttons without a matrix must be in a hidden matrix. One hack worth trying: Creating an explicit NSMatrix with 1 row, 1 column for each Shoes radio button so that osx won't manage them all collectively. Odd thinking but it might work.

[ccoupe]

This is a nasty problem. The semantic mismatch between OSX radios and Shoes radios is high. No wonder it was never fixed. Still isn't. Shoes treats radios just like checkboxes and Shoes manages the groups on/off settings. OSX radiobuttons assume there is a NSMatrix that will manage them and misbehave if there isn't. Radio buttons in Shoes are pretty clunky (as are checkboxes) but solving that breaks backwards compatibility so that's a different issue than this bug report.

[ccoupe]

The radio buttons need new images so they look more like OSX radios but the style below should be good enough for a while.

Also the start {} block messages show up if the screen is resized so the block does execute at the correct time - just needs to trigger a redraw.

[IanTrudel]

Is that normal the radio and para are misaligned vertically?

[ccoupe]

I haven't committed the code changes yet - its just a BezelStyle setting. They need to be drawn with NSImages which I haven't created (or borrowed).

[ccoupe]

For comparison, here's the old radios CFLAGS << ' -DOLD_RADIO'

[ccoupe]

Considering this note that Apple is deprecating/planning to deprecate NSCell and NSMatrix https://developer.apple.com/library/mac/releasenotes/AppKit/RN-AppKit/, It may not be worth the effort to draw the icon with the tiny white dot in the center.