/zoeplat : revision 41

1

-- Class: Mouse

2

-- This tracks the state of the mouse, i.e. its coordinates onscreen

3

-- and if a button was just pressed or released this frame.

4

--

5

-- See http://love2d.org/wiki/MouseConstant for a list of mouse button names.

6

--

7

-- Extends:

8

-- <Sprite>

9

10

Mouse = Sprite:extend{

11

visible = false,

12

13

-- private property: _thisFrame

14

-- what buttons are pressed this frame

15

-- if you are interested in this, use allPressed() instead

16

_thisFrame = {},

17

18

-- private property: lastFrame

19

-- what mouse buttons were pressed last frame

20

_lastFrame = {},

21

22

new = function (self, obj)

23

obj = self:extend(obj)

24

the.mouse = obj

25

love.mousepressed = function (x, y, button) obj:mousePressed(button) end

26

love.mousereleased = function (x, y, button) obj:mouseReleased(button) end

27

if obj.onNew then obj:onNew() end

28

return obj

29

end,

30

31

-- Method: pressed

32

-- Are *any* of the buttons passed held down this frame?

33

--

34

-- Arguments:

35

-- string button descriptions passed as individual arguments;

36

-- if none are passed, the left mouse button is assumed

37

--

38

-- Returns:

39

-- boolean

40

41

pressed = function (self, ...)

42

local buttons = {...}

43

44

if #buttons == 0 then buttons[1] = 'l' end

45

46

for _, value in pairs(buttons) do

47

if STRICT then

48

assert(type(value) == 'string', 'all mouse buttons are strings; asked to check a ' .. type(value))

49

end

50

51

if self._thisFrame[value] then

52

return true

53

end

54

end

55

56

return false

57

end,

58

59

-- Method: justPressed

60

-- Are *any* of the buttons passed pressed for the first time this frame?

61

--

62

-- Arguments:

63

-- string button descriptions passed as individual arguments;

64

-- if none are passed, the left mouse button is assumed

65

--

66

-- Returns:

67

-- boolean

68

69

justPressed = function (self, ...)

70

local buttons = {...}

71

72

if #buttons == 0 then buttons[1] = 'l' end

73

74

for _, value in pairs(buttons) do

75

if STRICT then

76

assert(type(value) == 'string', 'all mouse buttons are strings; asked to check a ' .. type(value))

77

end

78

79

if self._thisFrame[value] and not self._lastFrame[value] then

80

return true

81

end

82

end

83

84

return false

85

end,

86

87

-- Method: released

88

-- Are *all* of the buttons passed not held down this frame?

89

--

90

-- Arguments:

91

-- string button descriptions passed as individual arguments;

92

-- if none are passed, the left mouse button is assumed

93

--

94

-- Returns:

95

-- boolean

96

97

released = function (self, ...)

98

local buttons = {...}

99

if #buttons == 0 then buttons[1] = 'l' end

100

101

for _, value in pairs(buttons) do

102

if STRICT then

103

assert(type(value) == 'string', 'all mouse buttons are strings; asked to check a ' .. type(value))

104

end

105

106

if self._thisFrame[value] then

107

return false

108

end

109

end

110

111

return true

112

end,

113

114

-- Method: justReleased

115

-- Are *any* of the buttons passed released after being held last frame?

116

--

117

-- Arguments:

118

-- string button descriptions passed as individual arguments;

119

-- if none are passed, the left mouse button is assumed

120

--

121

-- Returns:

122

-- boolean

123

124

justReleased = function (self, ...)

125

local buttons = {...}

126

if #buttons == 0 then buttons[1] = 'l' end

127

128

for _, value in pairs(buttons) do

129

if STRICT then

130

assert(type(value) == 'string', 'all mouse buttons are strings; asked to check a ' .. type(value))

131

end

132

133

if self._lastFrame[value] and not self._thisFrame[value] then

134

return true

135

end

136

end

137

138

return false

139

end,

140

141

-- Method: allPressed

142

-- Returns all buttons currently pressed this frame.

143

--

144

-- Arguments:

145

-- none

146

--

147

-- Returns:

148

-- string button descriptions; if nothing is pressed, nil

149

150

allPressed = function (self)

151

local result = {}

152

153

for key, value in pairs(self._thisFrame) do

154

if value then table.insert(result, key) end

155

end

156

157

return unpack(result)

158

end,

159

160

-- Method: allJustPressed

161

-- Returns all buttons just pressed this frame.

162

--

163

-- Arguments:

164

-- none

165

--

166

-- Returns:

167

-- string button descriptions; if nothing is just pressed, nil

168

169

allJustPressed = function (self)

170

local result = {}

171

172

for key, value in pairs(self._thisFrame) do

173

if value and not self._lastFrame[key] then table.insert(result, key) end

174

end

175

176

return unpack(result)

177

end,

178

179

-- Method: allJustReleased

180

-- Returns all buttons just released this frame.

181

--

182

-- Arguments:

183

-- none

184

--

185

-- Returns:

186

-- string buttons descriptions; if nothing is just pressed, nil

187

188

allJustPressed = function (self)

189

local result = {}

190

191

for key, value in pairs(self._thisFrame) do

192

if not value and self._lastFrame[key] then table.insert(result, key) end

193

end

194

195

return unpack(result)

196

end,

197

198

mousePressed = function (self, button)

199

self._thisFrame[button] = true

200

end,

201

202

mouseReleased = function (self, button)

203

self._thisFrame[button] = false

204

end,

205

206

endFrame = function (self, elapsed)

207

for key, value in pairs(self._thisFrame) do

208

self._lastFrame[key] = value

209

end

210

211

self.x = love.mouse.getX() - the.app.inset.x

212

self.y = love.mouse.getY() - the.app.inset.y

213

214

Sprite.endFrame(self)

215

end,

216

217

update = function() end

218

}