152 lines
6.2 KiB
CoffeeScript
Executable File
152 lines
6.2 KiB
CoffeeScript
Executable File
# An ellipse in the whiteboard
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class @WhiteboardEllipseModel extends WhiteboardToolModel
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constructor: (@paper) ->
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super @paper
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# the defintion of this shape, kept so we can redraw the shape whenever needed
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# format: top left x, top left y, bottom right x, bottom right y, stroke color, thickness
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@definition = [0, 0, 0, 0, "#000", "0px"]
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# Make an ellipse on the whiteboard
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# @param {[type]} x the x value of the top left corner
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# @param {[type]} y the y value of the top left corner
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# @param {string} colour the colour of the object
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# @param {number} thickness the thickness of the object's line(s)
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make: (info) ->
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#console.log "Whiteboard - Making ellipse: "
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#console.log info
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if info?.points?
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x = info.points[0]
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y = info.points[1]
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color = info.color
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thickness = info.thickness
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@obj = @paper.ellipse(x * @gw + @xOffset, y * @gh + @yOffset, 0, 0)
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@obj.attr "stroke", formatColor(color)
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@obj.attr "stroke-width", zoomStroke(formatThickness(thickness))
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@definition = [x, y, y, x, @obj.attrs["stroke"], @obj.attrs["stroke-width"]]
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@obj
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# Update ellipse drawn
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# @param {number} x1 the x value of the top left corner in percent of current slide size
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# @param {number} y1 the y value of the top left corner in percent of current slide size
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# @param {number} x2 the x value of the bottom right corner in percent of current slide size
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# @param {number} y2 the y value of the bottom right corner in percent of current slide size
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# @param {boolean} square (draw a circle or not
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update: (info) ->
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#console.log info
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if info?.points?
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x1 = info.points[0]
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y1 = info.points[1]
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x2 = info.points[2]
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y2 = info.points[3]
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circle = info.square
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if @obj?
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[x1, x2] = [x2, x1] if x2 < x1
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if y2 < y1
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[y1, y2] = [y2, y1]
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reversed = true
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#if the control key is pressed then the width and height of the ellipse are equal (a circle)
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#we calculate this by making the y2 coord equal to the y1 coord plus the width of x2-x1 and corrected for the slide size
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if circle
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if reversed # if reveresed, the y1 coordinate gets updated, not the y2 coordinate
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y1 = y2 - (x2 - x1) * @gw / @gh
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else
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y2 = y1 + (x2 - x1) * @gw / @gh
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coords =
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x1: x1
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x2: x2
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y1: y1
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y2: y2
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#console.log(coords)
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rx = (x2 - x1) / 2
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ry = (y2 - y1) / 2
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r =
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rx: rx * @gw
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ry: ry * @gh
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cx: (rx + x1) * @gw + @xOffset
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cy: (ry + y1) * @gh + @yOffset
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@obj.attr(r)
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#console.log( "@gw: " + @gw + "\n@gh: " + @gh + "\n@xOffset: " + @xOffset + "\n@yOffset: " + @yOffset );
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# we need to update all these values, specially for when shapes are drawn backwards
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@definition[0] = x1
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@definition[1] = y1
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@definition[2] = x2
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@definition[3] = y2
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# Draw an ellipse on the whiteboard
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# @param {number} x1 the x value of the top left corner
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# @param {number} y1 the y value of the top left corner
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# @param {number} x2 the x value of the bottom right corner
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# @param {number} y2 the y value of the bottom right corner
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# @param {string} colour the colour of the object
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# @param {number} thickness the thickness of the object's line(s)
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draw: (x1, y1, x2, y2, colour, thickness) ->
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[x1, x2] = [x2, x1] if x2 < x1
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[y1, y2] = [y2, y1] if y2 < y1
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rx = (x2 - x1) / 2
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ry = (y2 - y1) / 2
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x = (rx + x1) * @gw + @xOffset
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y = (ry + y1) * @gh + @yOffset
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elip = @paper.ellipse(x, y, rx * @gw, ry * @gh)
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elip.attr Utils.strokeAndThickness(colour, thickness)
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elip
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# When first starting drawing the ellipse
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# @param {number} x the x value of cursor at the time in relation to the left side of the browser
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# @param {number} y the y value of cursor at the time in relation to the top of the browser
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# TODO: moved here but not finished
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dragOnStart: (x, y) ->
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# sx = (@paperWidth - @gw) / 2
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# sy = (@paperHeight - @gh) / 2
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# # find the x and y values in relation to the whiteboard
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# @ellipseX = (x - @containerOffsetLeft - sx + @xOffset)
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# @ellipseY = (y - @containerOffsetTop - sy + @yOffset)
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# globals.connection.emitMakeShape "ellipse",
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# [ @ellipseX / @paperWidth, @ellipseY / @paperHeight, @currentColour, @currentThickness ]
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# When first starting to draw an ellipse
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# @param {number} dx the difference in the x value at the start as opposed to the x value now
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# @param {number} dy the difference in the y value at the start as opposed to the y value now
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# @param {number} x the x value of cursor at the time in relation to the left side of the browser
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# @param {number} y the y value of cursor at the time in relation to the top of the browser
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# @param {Event} e the mouse event
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# TODO: moved here but not finished
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dragOnMove: (dx, dy, x, y, e) ->
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# # if shift is pressed, draw a circle instead of ellipse
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# dy = dx if @shiftPressed
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# dx = dx / 2
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# dy = dy / 2
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# # adjust for negative values as well
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# x = @ellipseX + dx
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# y = @ellipseY + dy
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# dx = (if dx < 0 then -dx else dx)
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# dy = (if dy < 0 then -dy else dy)
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# globals.connection.emitUpdateShape "ellipse",
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# [ x / @paperWidth, y / @paperHeight, dx / @paperWidth, dy / @paperHeight ]
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# When releasing the mouse after drawing the ellipse
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# @param {Event} e the mouse event
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# TODO: moved here but not finished
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dragOnStop: (e) ->
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# attrs = undefined
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# attrs = @currentEllipse.attrs if @currentEllipse?
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# if attrs?
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# globals.connection.emitPublishShape "ellipse",
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# [ attrs.cx / @gw, attrs.cy / @gh, attrs.rx / @gw, attrs.ry / @gh,
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# @currentColour, @currentThickness ]
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# @currentEllipse = null # late updates will be blocked by this
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