Autorepeat Button

bravcm · February 2014

Hi to all,

does anybody already made "autorepeat button" which repeats click event when it is pressed?

Best regards

OZApps · February 2014

@bravcm,
you can use the dispatch event

 function autorepeat(theEventObj, oldX, oldY)
   local evtD = theEventObj or Core.class(EventDispatcher)
   local evt = Event.new(Event.MOUSE_DOWN)
   evt.x = oldX
   evt.y = oldY
 
   evtD:dispatchEvent(evt)
end

This code is for illustration, and works on the assumption that you will set the event handler and handle all Event.MOUSE_DOWN events. So you call the autorepeat as

autorepeat( theObj, xPos, yPos)

where theObj is the object that is handling the event and the position xPos, yPos is taken as the last position to give the impression that the click/tap is at the same location as the last click/tap.

If you were after something else, please re-iterate what you were after.

Cheers,

bravcm · February 2014

Thanks, @ozapps, here is modified button class, any improvements welcome!

--[[
A generic button class
 
This code is MIT licensed, see <a href="http://www.opensource.org/licenses/mit-license.php" rel="nofollow">http://www.opensource.org/licenses/mit-license.php</a>
(C) 2010 - 2011 Gideros Mobile 
 
P.S. Added autorepeat option
]]
 
Button = Core.class(Sprite)
 
function Button:init(upState, downState, autorepeat)
	self.upState = upState
	self.downState = downState
	self.autorepeat = autorepeat
	self.timer = Timer.new(50, 6)
 
	self.focus = false
 
	self:updateVisualState(false)
 
	self:addEventListener(Event.MOUSE_DOWN, self.onMouseDown, self)
	self:addEventListener(Event.MOUSE_MOVE, self.onMouseMove, self)
	self:addEventListener(Event.MOUSE_UP, self.onMouseUp, self)
 
	self:addEventListener(Event.TOUCHES_BEGIN, self.onTouchesBegin, self)
	self:addEventListener(Event.TOUCHES_MOVE, self.onTouchesMove, self)
	self:addEventListener(Event.TOUCHES_END, self.onTouchesEnd, self)
	self:addEventListener(Event.TOUCHES_CANCEL, self.onTouchesCancel, self)
end
 
function Button:onMouseDown(event)
	if self:isVisible() == false then return end
 
	if self:hitTestPoint(event.x, event.y) then
		self.focus = true
		self:updateVisualState(true)
 
		if not self.timer:hasEventListener(Event.TIMER) and self.autorepeat then
			self.timer:setDelay(300)
			self.timer:setRepeatCount(0)
			self.timer:addEventListener(Event.TIMER,self.onPressing, self)
		end
		if self.autorepeat then
			self.timer:start()
		end
 
		event:stopPropagation()
	end
end
 
function Button:onPressing(event)
	if self.timer:getCurrentCount() == 3 then
		self.timer:setDelay(250)
	end
	if self.timer:getCurrentCount() == 7 then
		self.timer:setDelay(200)
	end
	if self.timer:getCurrentCount() == 12 then
		self.timer:setDelay(150)
	end
	if self.timer:getCurrentCount() == 20 then
		self.timer:setDelay(100)
	end
	if self.timer:getCurrentCount() == 60 then
		self.timer:setDelay(30)
	end
	self:dispatchEvent(Event.new("click"))
end
 
function Button:onMouseMove(event)
	if self.focus then
		if not self:hitTestPoint(event.x, event.y) then
			self.focus = false;
			self:updateVisualState(false)
		end
		event:stopPropagation()
	end
end
 
function Button:onMouseUp(event)
	if self.autorepeat then
		self.timer:stop()
		self.timer:removeEventListener(Event.TIMER,self.onPressing, self)
	end
 
	if self.focus then
		self.focus = false;
		self:updateVisualState(false)
		self:dispatchEvent(Event.new("click"))
		event:stopPropagation()
	end
end
 
-- if button is on focus, stop propagation of touch events
function Button:onTouchesBegin(event)
	if self.focus then
		event:stopPropagation()
	end
end
 
-- if button is on focus, stop propagation of touch events
function Button:onTouchesMove(event)
	if self.focus then
		event:stopPropagation()
	end
end
 
-- if button is on focus, stop propagation of touch events
function Button:onTouchesEnd(event)
	if self.focus then
		event:stopPropagation()
	end
end
 
-- if touches are cancelled, reset the state of the button
function Button:onTouchesCancel(event)
	if self.focus then
		self.focus = false;
		self:updateVisualState(false)
		event:stopPropagation()
	end
end
 
-- if state is true show downState else show upState
function Button:updateVisualState(state)
	if state then
		if self:contains(self.upState) then
			self:removeChild(self.upState)
		end
 
		if self.downState ~= nil and not self:contains(self.downState) then
			self:addChild(self.downState)
		end
	else
		if self.downState ~= nil and self:contains(self.downState) then
			self:removeChild(self.downState)
		end
 
		if not self:contains(self.upState) then
			self:addChild(self.upState)
		end
	end
end

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