path: root/js/tools/LineTool.js

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var Montage = 	require("montage/core/core").Montage,
    ShapeTool = require("js/tools/ShapeTool").ShapeTool,
    DrawingToolBase = require("js/tools/drawing-tool-base").DrawingToolBase,
    NJUtils = require("js/lib/NJUtils").NJUtils,
    TagTool = require("js/tools/TagTool").TagTool,
    ShapesController = 	require("js/controllers/elements/shapes-controller").ShapesController,
    ShapeModel = require("js/models/shape-model").ShapeModel;

var Line = require("js/lib/geom/line").Line;
var MaterialsModel = require("js/models/materials-model").MaterialsModel;

exports.LineTool = Montage.create(ShapeTool, {
	_toolID: { value: "lineTool" },
	_imageID: { value: "lineToolImg" },
	_toolImageClass: { value: "lineToolUp" },
	_selectedToolImageClass: { value: "lineToolDown" },
	_toolTipText: { value: "Line Tool (L)" },

    _tmpDrawIndex : { value : 1, writable:true},

    _mode: {value: null, writable:true},

    // Need to keep track of current mouse position for KEY modifiers event which do not have mouse coordinates
    _currentX: {value: 0, writable: true},
    _currentY: {value: 0, writable: true},
    _lineView: {value: null, writable:true},
    _ovalView: {value: null, writable:true},

    _strokeSize: { value: 1 },
    _strokeColor: { value: null },

    HandleLeftButtonDown:
    {
        value: function (event)
        {
            if(this._canDraw) {
                this._isDrawing = true;
            }

            this._strokeSize = ShapesController.GetValueInPixels(this.options.strokeSize.value, this.options.strokeSize.units, null);
            if (this.options.stroke.color) {
                if( (this.options.stroke.colorMode === "gradient") || (this.options.stroke.colorMode === "nocolor") ) {
                    this._strokeColor = [0,0,0,1];
                } else {
                    this._strokeColor = this.options.stroke.color.css;
                }
            } else {
                this._strokeColor = [0,0,0,1];
            }

            this.startDraw(event);
        }
    },

    HandleLeftButtonUp: {
        value: function (event) {
            var slope = this._getSlope(),
                canvas,
                xAdj = 0,
                yAdj = 0,
                w,
                h;

            if(slope) {
                this.drawData = this.getDrawingData();
                if(this.drawData) {
                    w = Math.floor(this.drawData.width);
                    h = Math.floor(this.drawData.height);
                    if(!this._useExistingCanvas()) {
                            // set the dimensions
                            if(slope === "horizontal") {
                                h = Math.max(this._strokeSize, 1);
                                w = Math.max(w, 1);
                            } else if(slope === "vertical") {
                                w = Math.max(this._strokeSize, 1);
                                h = Math.max(h, 1);
                            } else {
                                // else make the line's stroke fit inside the canvas by growing the canvas
                                var theta = Math.atan(slope);
                                xAdj = Math.abs((this._strokeSize/2)*Math.sin(theta));
                                yAdj = Math.abs((this._strokeSize/2)*Math.cos(theta));

                                w += ~~(xAdj*2);
                                h += ~~(yAdj*2);
                            }

                            canvas = document.application.njUtils.make("canvas", {"data-RDGE-id": NJUtils.generateRandom()}, this.application.ninja.currentDocument);

                            var styles = document.application.njUtils.stylesFromDraw(canvas, w, h, this.drawData);
                            this.application.ninja.elementMediator.addElements(canvas, styles);
                        } else {
                            canvas = this._targetedElement;
                            canvas.elementModel.controller = ShapesController;
                            if(!canvas.elementModel.shapeModel) {
                                canvas.elementModel.shapeModel = Montage.create(ShapeModel);
                        }
                    }
                }
            }

            this.endDraw(event);

            this._isDrawing = false;
            this._hasDraw=false;

            this.DrawHandles();
        }
    },

    onAddElements: {
        value: function(el) {
            var xAdj = 0, yAdj = 0, w, h, slope = this._getSlope();

            if(this.drawData) {
                // set the dimensions
                w = Math.floor(this.drawData.width);
                h = Math.floor(this.drawData.height);
                if(slope === "horizontal") {
                    h = Math.max(this._strokeSize, 1);
                    w = Math.max(w, 1);
                } else if(slope === "vertical") {
                    w = Math.max(this._strokeSize, 1);
                    h = Math.max(h, 1);
                } else {
                    // else make the line's stroke fit inside the canvas by growing the canvas
                    var theta = Math.atan(slope);
                    xAdj = Math.abs((this._strokeSize/2)*Math.sin(theta));
                    yAdj = Math.abs((this._strokeSize/2)*Math.cos(theta));

                    w += ~~(xAdj*2);
                    h += ~~(yAdj*2);
                }

                this.RenderShape(w, h, this.drawData.planeMat, this.drawData.midPt, el, slope, xAdj, yAdj);
            }
        }
    },

    _getSlope: {
        value: function() {
            var hitRec0 = this._mouseDownHitRec,
                hitRec1 = this._mouseUpHitRec,
                slope,
                dx,
                dy;

			if (hitRec0 && hitRec1) {
				var p0 = hitRec0.getLocalPoint(),
					p1 = hitRec1.getLocalPoint();

                dx = Math.floor(p0[0] - p1[0]);
                dy = Math.floor(p0[1] - p1[1]);

                if( (dx === 0) && (dy === 0) ) {
                    return null;
                }

                // check for divide by 0 for vertical line:
                if(dx === 0) {
                    // vertical line
                    slope = "vertical";
                } else if (dy === 0) {
                    // horizontal line
                    slope = "horizontal";
                } else {
                    // if slope is positive, draw a line from top-left to bottom-right
                    slope = dy/dx;
                }
            }

            return slope;
        }
    },

    _doDraw: {
        value: function () {
            if (this.mouseDownHitRec !== null) {
                DrawingToolBase.stageComponent = this.application.ninja.stage;
                DrawingToolBase.drawLine(this.mouseDownHitRec, this.mouseUpHitRec, this._strokeSize, this._strokeColor);
            }
        }
    },

    HandleShiftKeyDown: {
        value: function (event) {
            if (this._isDrawing) {
                var slope = Math.abs((this.downPoint.y - this.currentY)/(this.downPoint.x - this.currentX));
                // If slope is less than 0.5, make it a horizontal line
                if(slope < 0.5)
                {
                    this._mouseUpHitRec = DrawingToolBase.getUpdatedSnapPoint(this.currentX, this.downPoint.y, false, this._mouseDownHitRec);
                }
                // If slope is greater than 2, make it a vertical line
                else if(slope > 2)
                {
                    this._mouseUpHitRec = DrawingToolBase.getUpdatedSnapPoint(this.downPoint.x, this.currentY, false, this._mouseDownHitRec);
                }
                // make it a 45 degree line
                else
                {
                    var square = this.toSquare(this.downPoint.x, this.currentX, this.downPoint.y, this.currentY);
                    this._mouseUpHitRec = DrawingToolBase.getUpdatedSnapPoint(square[0] + square[2], square[1] + square[3], false, this._mouseDownHitRec);
                }
                this._doDraw();
            }
        }
    },

    HandleShiftKeyUp: {
        value: function () {
            if (this._isDrawing) {
                this.mouseUpHitRec = DrawingToolBase.getUpdatedSnapPoint(this.currentX, this.currentY, false, this.mouseDownHitRec);
                this._doDraw();
            }
        }
    },

    RenderShape: {
		value: function (w, h, planeMat, midPt, canvas, slope, xAdj, yAdj)
        {

            var strokeStyleIndex = this.options.strokeStyleIndex;
            var strokeStyle = this.options.strokeStyle;
            var strokeSize = this._strokeSize;

            var left = Math.round(midPt[0] - 0.5*w);
            var top = Math.round(midPt[1] - 0.5*h);

            var strokeColor = this.options.stroke.webGlColor;
            // for default stroke and fill/no materials
            var strokeMaterial = null;
            var strokeM = null;

            if(this.options.use3D)
            {
                strokeM = this.options.strokeMaterial;
                if(strokeM)
                {
                    strokeMaterial = Object.create(MaterialsModel.getMaterial(strokeM));
                }
				strokeColor = ShapesController.getMaterialColor(strokeM) || strokeColor;
            }

            var world = this.getGLWorld(canvas, this.options.use3D);

            var xOffset = ((left - canvas.offsetLeft + w/2) - canvas.width/2);
            var yOffset = (canvas.height/2 - (top - canvas.offsetTop + h/2));

            var line = Object.create(Line, {});
            line.init(world, xOffset, yOffset, w, h, slope, strokeSize, strokeColor, strokeMaterial, strokeStyle, xAdj, yAdj);

            world.addObject(line);
            world.render();

            canvas.elementModel.shapeModel.shapeCount++;
            if(canvas.elementModel.shapeModel.shapeCount === 1)
            {
//                canvas.elementModel.selection = "Line";
                canvas.elementModel.pi = "LinePi";
                canvas.elementModel.shapeModel.strokeSize = this.options.strokeSize.value + " " + this.options.strokeSize.units;

                canvas.elementModel.shapeModel.strokeStyleIndex = strokeStyleIndex;
                canvas.elementModel.shapeModel.strokeStyle = strokeStyle;

                canvas.elementModel.shapeModel.GLGeomObj = line;
                canvas.elementModel.shapeModel.useWebGl = this.options.use3D;
                canvas.elementModel.shapeModel.slope = slope;
            }
            else
            {
                // TODO - update the shape's info only.  shapeModel will likely need an array of shapes.
            }

            // TODO - This needs to be moved into geom obj's init routine instead of here
            if(!strokeM) {
                this.setColor(canvas, this.options.stroke, false, "lineTool");
            }

            if(canvas.elementModel.isShape)
            {
                this.application.ninja.selectionController.selectElement(canvas);
            }

        }
    }
});