allow buttons to nest as well

Dependencies

• [2] K6DTOGOQ flip return value of button handlers
• [3] XX7G2FFJ intermingle freehand line drawings with text
• [4] PW2VGQWN indent
• [5] BJ46QVIP improve explanation for buttons
• [6] 6D5MOJS4 allow buttons to interrupt events
• [*] PP2IIHL6 stop putting button state in a global

Change contents

• replacement in button.lua at line 3
  [3.117]→[2.98:193](∅→∅)
  − -- If any applicable button handler returns true, it'll propagate the click to other handlers.
  [3.117]

  [3.2080]
  + --

  + -- Buttons can nest in principle, though I haven't actually used that yet.

  + --

  + -- Don't rely on the order in which handlers are run. Within any widget, all

  + -- applicable button handlers will run. If _any_ of them returns true, the

  + -- event will continue to propagate elsewhere in the widget.
• edit in button.lua at line 26
  [8.465]

  [8.465]
  + local result = false
• replacement in button.lua at line 30
  [3.66]→[2.274:307](∅→∅)
  − return not ev.onpress1()
  [3.66]

  [3.88]
  + if not ev.onpress1() then

  + result = true

  + end
• edit in button.lua at line 36
  [3.2671]

  [3.2671]
  + return result