112 lines
3.3 KiB
Standard ML
112 lines
3.3 KiB
Standard ML
structure AppUpdate =
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struct
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open AppType
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local
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fun helpGetTrianglesVector (lst, acc) =
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case lst of
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{x1, y1, x2, y2, x3, y3} :: tl =>
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let val vec = Vector.fromList [x1, y1, x2, y2, x3, y3]
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in helpGetTrianglesVector (tl, vec :: acc)
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end
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| [] => acc
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in
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fun getTrianglesVector (app: app_type) =
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let val lst = helpGetTrianglesVector (#triangles app, [])
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in Vector.concat lst
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end
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end
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local
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val clickPoints =
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#[ 25, 50, 75, 100
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, 125, 150, 175, 200
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, 225, 250, 275, 300
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, 325, 350, 375, 400
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, 425, 450, 475
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]
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fun getVerticalClickPos (idx, horizontalPos, mouseX, mouseY, r, g, b) =
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if idx = Vector.length clickPoints then
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#[]
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else
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let
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val curVerticalPos = Vector.sub (clickPoints, idx)
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in
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if mouseY < curVerticalPos - 10 orelse mouseY > curVerticalPos + 10 then
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getVerticalClickPos
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(idx + 1, horizontalPos, mouseX, mouseY, r, g, b)
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else
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let
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val left = Real32.fromInt (horizontalPos - 10) / 500.0
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val right = Real32.fromInt (horizontalPos + 10) / 500.0
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val bottom = Real32.fromInt (curVerticalPos - 10) / 500.0
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val top = Real32.fromInt (curVerticalPos + 10) / 500.0
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in
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#[ left, bottom, r, g, b
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, right, bottom, r, g, b
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, left, top, r, g, b
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, left, top, r, g, b
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, right, bottom, r, g, b
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, right, top, r, g, b
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]
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end
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end
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fun getHorizontalClickPos (idx, mouseX, mouseY, r, g, b) =
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if idx = Vector.length clickPoints then
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#[]
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else
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let
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val curPos = Vector.sub (clickPoints, idx)
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in
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if mouseX < curPos - 10 orelse mouseX > curPos + 10 then
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getHorizontalClickPos (idx + 1, mouseX, mouseY, r, g, b)
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else
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getVerticalClickPos (0, curPos, mouseX, mouseY, r, g, b)
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end
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in
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(*
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* This function returns a vector containing the position data of the
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* clicked square.
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* If a square wasn't found at the clicked position,
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* an empty vector is returned.
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*)
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fun getClickPos (mouseX, mouseY, r, g, b) =
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getHorizontalClickPos (0, mouseX, mouseY, r, g, b)
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end
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fun update (model, mouseX, mouseY, inputMsg) =
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let
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open DrawMessage
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open InputMessage
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in
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case inputMsg of
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MOUSE_MOVE {x = mouseX, y = mouseY} =>
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let
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val _ = print "mouse moved\n"
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val drawMsg =
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DRAW_BUTTON (getClickPos (mouseX, mouseY, 1.0, 0.0, 0.0))
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in
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(model, drawMsg, mouseX, mouseY)
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end
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| MOUSE_LEFT_RELEASE =>
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let
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val _ = print "mouse released\n"
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val drawMsg =
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DRAW_BUTTON (getClickPos (mouseX, mouseY, 1.0, 0.0, 0.0))
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in
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(model, drawMsg, mouseX, mouseY)
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end
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| MUSE_LEFT_CLICK =>
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let
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val _ = print "mouse clicked\n"
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val buttonVec = getClickPos (mouseX, mouseY, 1.0, 0.0, 0.0)
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val drawMsg = DRAW_BUTTON buttonVec
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in
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(model, drawMsg, mouseX, mouseY)
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end
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end
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end
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