minor bugfixes - cleanup

sys/modules/opus/ui/canvas.lua

@@ -361,7 +361,8 @@ function Canvas:__renderLayers(device, offset, doubleBuffer)
 			  y = region[2] - offset.y,
 			  ex = region[3] - offset.x,
 			  ey = region[4] - offset.y },
-			{ x = region[1], y = region[2] }, doubleBuffer)
+			{ x = region[1], y = region[2] },
+			doubleBuffer)
 	end
 	self.regions = nil
 

sys/modules/opus/ui/components/Checkbox.lua

@@ -12,6 +12,7 @@ UI.Checkbox.defaults = {
 	textColor = 'white',
 	backgroundColor = 'black',
 	backgroundFocusColor = 'lightGray',
+	event = 'checkbox_change',
 	height = 1,
 	width = 3,
 	accelerators = {
@@ -52,7 +53,7 @@ end
 function UI.Checkbox:eventHandler(event)
 	if event.type == 'checkbox_toggle' then
 		self.value = not self.value
-		self:emit({ type = 'checkbox_change', checked = self.value, element = self })
+		self:emit({ type = self.event, checked = self.value, element = self })
 		self:draw()
 		return true
 	end

sys/modules/opus/ui/components/TitleBar.lua

@@ -77,9 +77,7 @@ function UI.TitleBar.example()
 				x = 2, y = 3,
 				text = 'Press',
 			},
-			focus = function (self)
-				self:raise()
-			end,
+			focus = UI.Window.raise,
 		},
 		draw = function(self, isBG)
 			for i = 1, self.height do