135 lines
3.3 KiB
Standard ML
135 lines
3.3 KiB
Standard ML
structure MoveMode =
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struct
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open AppType
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open InputMessage
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open DrawMessage
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open UpdateMessage
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fun resizeWindow (model, width, height) =
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let
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val model = AppWith.windowResize (model, width, height)
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val dots = Vector.fromList []
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in
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CommonUpdate.resizeWindow (model, width, height, dots)
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end
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fun getDrawMsg (model: app_type) =
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let
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val
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{ canvasWidth
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, canvasHeight
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, windowWidth
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, windowHeight
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, squares
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, xClickPoints
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, yClickPoints
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, ...
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} = model
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val maxSide = Int.max (canvasWidth, canvasHeight)
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val squares = CollisionTree.toTriangles
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( windowWidth
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, windowHeight
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, squares
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, maxSide
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, canvasWidth
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, canvasHeight
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, xClickPoints
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, yClickPoints
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)
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val drawMsg =
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DRAW_SQUARES_AND_DOTS {squares = squares, dots = Vector.fromList []}
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in
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(model, [DRAW drawMsg])
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end
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val blankPixel = {r = 0, g = 0, b = 0, a = 0}
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fun makeBlankYAxis length =
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Vector.tabulate (length, fn _ => blankPixel)
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fun makeBlankXAxis length =
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Vector.tabulate (length, fn _ => makeBlankYAxis length)
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fun moveImageUp (model: app_type) =
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let
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val {squares, ...} = model
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val squares =
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Vector.mapi
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(fn (_, yAxis) =>
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Vector.mapi
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(fn (yIdx, pixel) =>
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if yIdx = Vector.length yAxis - 1 then blankPixel
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else Vector.sub (yAxis, yIdx + 1)) yAxis) squares
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val model = AppWith.squares (model, squares)
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in
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getDrawMsg model
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end
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fun moveImageDown (model: app_type) =
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let
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val {squares, ...} = model
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val squares =
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Vector.mapi
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(fn (_, yAxis) =>
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Vector.mapi
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(fn (yIdx, pixel) =>
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if yIdx = 0 then blankPixel else Vector.sub (yAxis, yIdx - 1))
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yAxis) squares
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val model = AppWith.squares (model, squares)
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in
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getDrawMsg model
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end
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fun moveImageLeft (model: app_type) =
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let
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val {squares, ...} = model
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val squares =
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Vector.mapi
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(fn (idx, yAxis) =>
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if idx + 1 = Vector.length squares then
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makeBlankYAxis (Vector.length squares)
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else
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Vector.sub (squares, idx + 1)) squares
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val model = AppWith.squares (model, squares)
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in
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getDrawMsg model
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end
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fun moveImageRight (model: app_type) =
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let
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val {squares, ...} = model
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val squares =
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Vector.mapi
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(fn (idx, yAxis) =>
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if idx = 0 then makeBlankYAxis (Vector.length squares)
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else Vector.sub (squares, idx - 1)) squares
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val model = AppWith.squares (model, squares)
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in
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getDrawMsg model
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end
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fun enterNormalMode model =
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let val model = AppWith.mode (model, AppType.NORMAL_MODE)
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in (model, [])
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end
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fun update (model, inputMsg) =
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case inputMsg of
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ARROW_UP => moveImageUp model
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| ARROW_DOWN => moveImageDown model
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| ARROW_LEFT => moveImageLeft model
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| ARROW_RIGHT => moveImageRight model
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| KEY_ESC => enterNormalMode model
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| RESIZE_WINDOW {width, height} => resizeWindow (model, width, height)
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| _ => (model, [])
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end
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