button.lua

   1 -- Simple immediate-mode buttons with (currently) just an onpress1 handler for
   2 -- the left button.
   3 --
   4 -- Buttons can nest in principle, though I haven't actually used that yet.
   5 --
   6 -- Don't rely on the order in which handlers are run. Within any widget, all
   7 -- applicable button handlers will run. If _any_ of them returns true, the
   8 -- event will continue to propagate elsewhere in the widget.
   9
  10 -- draw button and queue up event handlers
  11 function button(State, name, params)
  12   if State.button_handlers == nil then
  13     State.button_handlers = {}
  14   end
  15   love.graphics.setColor(params.bg.r, params.bg.g, params.bg.b, params.bg.a)
  16   love.graphics.rectangle('fill', params.x,params.y, params.w,params.h, 5,5)
  17   if params.icon then params.icon(params) end
  18   table.insert(State.button_handlers, params)
  19 end
  20
  21 -- process button event handlers
  22 function mouse_press_consumed_by_any_button_handler(State, x, y, mouse_button)
  23   if State.button_handlers == nil then
  24     return
  25   end
  26   local button_pressed = false
  27   local consume_press = true
  28   for _,ev in ipairs(State.button_handlers) do
  29     if x>ev.x and x<ev.x+ev.w and y>ev.y and y<ev.y+ev.h then
  30       if ev.onpress1 and mouse_button == 1 then
  31         button_pressed = true
  32         if ev.onpress1() then
  33           consume_press = false
  34         end
  35       end
  36     end
  37   end
  38   return button_pressed and consume_press
  39 end