48 lines
1.6 KiB
Fennel
48 lines
1.6 KiB
Fennel
(fn attach-imstate [view]
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(set view.imstate {:x (love.mouse.getX) :y (love.mouse.getY)})
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(local cls view.__index)
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(fn view.on_mouse_pressed [self button x y clicks]
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(tset self.imstate button :pressed)
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(set self.imstate.x x)
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(set self.imstate.y y)
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(cls.on_mouse_pressed self button x y clicks))
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(fn view.on_mouse_moved [self x y dx dy]
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(set self.imstate.x x)
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(set self.imstate.y y)
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(cls.on_mouse_moved self x y dx dy))
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(fn view.on_mouse_released [self button x y]
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(tset self.imstate button :released)
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(set self.imstate.x x)
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(set self.imstate.y y)
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(cls.on_mouse_released self button x y))
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(fn view.draw [self]
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(cls.draw self)
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(when (= self.imstate.left :released)
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(set self.imstate.active nil))
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(each [_ button (pairs [:left :middle :right])]
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(tset self.imstate button
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(match (. self.imstate button)
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:pressed :down
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:down :down
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:released nil)))))
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(fn make-tag [tag]
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(match (type tag)
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:string tag
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:table (table.concat tag "::")
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_ (tostring tag)))
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(fn mouse-inside [view x y w h]
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(and (>= view.imstate.x x) (<= view.imstate.x (+ x w)) (>= view.imstate.y y) (<= view.imstate.y (+ y h))))
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(fn activate [view tag x y w h]
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(when (and (= view.imstate.left :pressed) (mouse-inside view x y w h))
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(set view.imstate.active (make-tag tag))
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true))
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(fn active? [view tag] (= view.imstate.active (make-tag tag)))
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(fn button [view tag x y w h]
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(activate view tag x y w h)
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(and (active? view tag) (= view.imstate.left :released) (mouse-inside view x y w h)))
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{: attach-imstate : mouse-inside : activate : active? : button}
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