GyroscopeTest/button.lua at master · pmanna/GyroscopeTest · GitHub

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
--[[
A generic button class

This code is MIT licensed, see http://www.opensource.org/licenses/mit-license.php
(C) 2010 - 2011 Gideros Mobile
]]

Button = gideros.class(Sprite)

function Button:init(upState, downState, selState)
	self.upState	= upState
	self.downState	= downState
	self.selState	= selState or nil

	self.toggle		= false
	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:hitTestPoint(event.x, event.y) then
		self.focus = true
		self:updateVisualState(true)
		event:stopPropagation()
	end
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.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

function Button:setToggle(state)
	if (self.selState) then
		if self.toggle ~= state then
			if self.toggle then
				self:removeChild(self.selState)
				self:addChild(self.upState)
			else
				self:removeChild(self.upState)
				self:addChild(self.selState)
			end
			self.toggle = state
		end
	end
end
-- if state is true show downState else show upState
-- if there's a selState, then behaves as a toggle button
function Button:updateVisualState(state)
	if state then
		if not self.toggle then
			if self:contains(self.upState) then
				self:removeChild(self.upState)
			end
		else
			if self:contains(self.selState) then
				self:removeChild(self.selState)
			end
		end

		if not self:contains(self.downState) then
			self:addChild(self.downState)
		end
	else
		if self:contains(self.downState) then
			self:removeChild(self.downState)
		end

		if self.selState then	-- it's a toggle button
			if self.toggle then
				self:addChild(self.upState)
				self.toggle	= false
			else
				self:addChild(self.selState)
				self.toggle	= true
			end
		else
			if not self:contains(self.upState) then
				self:addChild(self.upState)
			end
		end
	end
end