(function($) {
var mouseUp = function(evt) {
var target = evt.target;
target.mx = evt.clientX;
target.my = evt.clientY;
target.mDown = false;
}
var mouseDown = function(evt) {
//alert("mouseDown");
var target = evt.target;
target.mx = evt.clientX;
target.my = evt.clientY;
target.mDown = true;
}
var mouseOut = function(evt) {
var target = evt.target;
target.mx = evt.clientX;
target.my = evt.clientY;
target.mDown = false;
}
var mouseMove = function(evt) {
var target = evt.target;
if (target.mDown) {
var dx = evt.clientX - target.mx;
var dy = evt.clientY - target.my;
evt.dragX = dx;
evt.dragY = dy;
mouseDrag(evt);
}
target.mx = evt.clientX;
target.my = evt.clientY;
}
var mouseDrag = function(evt) {
//alert("mouseDragged ");
translateDeltaGraph(evt.target, evt.dragX, evt.dragY);
}
var mouseScrolled = function(evt) {
//alert("scroll");
if (!evt) {
evt = window.event;
}
var target = evt.target;
var leftOffset = 0;
var topOffset = 0;
if (!target.marker) {
while (!target.farthestViewportElement) {
target = target.parentNode;
}
target = target.farthestViewportElement;
}
// Trackball/trackpad vs wheel. Need to accommodate
var delta = 0;
if (evt.wheelDelta) {
delta = event.wheelDelta / 120;
}
else if (evt.detail) {
delta = -evt.detail / 3;
}
var zoomLevel = boundZoomLevel(target, Math.floor(target.zoomIndex + delta));
target.zoomIndex = zoomLevel;
var scale = target.zoomLevels[zoomLevel];
var y = evt.layerY;
var x = evt.layerX;
scaleGraph(target, scale, x, y);
}
this.boundZoomLevel = function(target, level) {
if (level >= target.settings.zoomNumLevels) {
return target.settings.zoomNumLevels - 1;
}
else if (level <= 0 ) {
return 0;
}
return level;
}
this.scaleGraph = function(target, scale, x, y) {
var sfactor = scale/target.scale;
target.scale = scale;
target.translateX = sfactor*target.translateX + x - sfactor*x;
target.translateY = sfactor*target.translateY + y - sfactor*y;
if (target.model) {
target.model.trigger("scaled");
}
retransform(target);
}
this.translateDeltaGraph = function(target, x, y) {
target.translateX += x;
target.translateY += y;
if (target.model) {
target.model.trigger("panned");
}
retransform(target);
}
this.retransform = function(target) {
//$(target).children('g').attr("transform", "translate(" + target.translateX + "," + target.translateY + ") scale(" + target.scale + ")");
var gs = target.childNodes;
var transformString = "translate(" + target.translateX + "," + target.translateY + ") scale(" + target.scale + ")";
for (var i = 0; i < gs.length; ++i) {
var g = gs[i];
if (g.nodeName == 'g') {
g.setAttribute("transform", transformString);
}
}
if (target.model) {
var obj = target.model.get("transform");
if (obj) {
obj.scale = target.scale;
obj.height = target.parentNode.clientHeight;
obj.width = target.parentNode.clientWidth;
obj.x1 = target.translateX;
obj.y1 = target.translateY;
obj.x2 = obj.x1 + obj.width*obj.scale;
obj.y2 = obj.y1 + obj.height*obj.scale;
}
}
}
this.resetTransform = function(target) {
var settings = target.settings;
target.translateX = settings.x;
target.translateY = settings.y;
if (settings.x < settings.x2) {
var factor = 0.90;
// Reset scale and stuff.
var divHeight = target.parentNode.clientHeight;
var divWidth = target.parentNode.clientWidth;
var width = settings.x2 - settings.x;
var height = settings.y2 - settings.y;
var aspectRatioGraph = height/width;
var aspectRatioDiv = divHeight/divWidth;
var scale = aspectRatioGraph > aspectRatioDiv ? (divHeight/height)*factor : (divWidth/width)*factor;
target.scale = scale;
}
else {
target.zoomIndex = boundZoomLevel(target, settings.zoomIndex);
target.scale = target.zoomLevels[target.zoomIndex];
}
}
this.animateTransform = function(target, scale, x, y, duration) {
var zoomLevel = calculateZoomLevel(scale, target.zoomLevels);
target.fromScaleLevel = target.zoomIndex;
target.toScaleLevel = zoomLevel;
target.fromX = target.translateX;
target.fromY = target.translateY;
target.fromScale = target.scale;
target.toScale = target.zoomLevels[zoomLevel];
target.toX = x;
target.toY = y;
target.startTime = new Date().getTime();
target.endTime = target.startTime + duration;
this.animateTick(target);
}
this.animateTick = function(target) {
var time = new Date().getTime();
if (time < target.endTime) {
var timeDiff = time - target.startTime;
var progress = timeDiff / (target.endTime - target.startTime);
//target.zoomIndex = Math.floor((target.toScaleLevel - target.fromScaleLevel)*progress) + target.fromScaleLevel;
//target.scale = target.zoomLevels[target.zoomIndex];
target.scale = (target.toScale - target.fromScale)*progress + target.fromScale;
target.translateX = (target.toX - target.fromX)*progress + target.fromX;
target.translateY = (target.toY - target.fromY)*progress + target.fromY;
retransform(target);
setTimeout(function() {this.animateTick(target)}, 1);
}
else {
target.zoomIndex = target.toScaleLevel;
target.scale = target.zoomLevels[target.zoomIndex];
target.translateX = target.toX;
target.translateY = target.toY;
retransform(target);
}
}
this.calculateZoomScale = function(scaleLevel, numLevels, points) {
if (scaleLevel <= 0) {
return points[0];
}
else if (scaleLevel >= numLevels) {
return points[points.length - 1];
}
var factor = (scaleLevel / numLevels) * (points.length - 1);
var floorIdx = Math.floor(factor);
var ceilingIdx = Math.ceil(factor);
var b = factor - floorIdx;
return b*(points[ceilingIdx] - points[floorIdx]) + points[floorIdx];
}
this.calculateZoomLevel = function(scale, zoomLevels) {
if (scale >= zoomLevels[zoomLevels.length - 1]) {
return zoomLevels.length - 1;
}
else if (scale <= zoomLevels[0]) {
return 0;
}
var i = 0;
// Plain old linear scan
for (; i < zoomLevels.length; ++i) {
if (scale < zoomLevels[i]) {
i--;
break;
}
}
if (i < 0) {
return 0;
}
return i;
}
var methods = {
init : function(options) {
var settings = {
x: 0,
y: 0,
x2: 0,
y2: 0,
minX: -1000,
minY: -1000,
maxX: 1000,
maxY: 1000,
zoomIndex: 24,
zoomPoints: [0.1, 0.14, 0.2, 0.4, 0.8, 1, 1.6, 2.4, 4, 8, 16],
zoomNumLevels: 48
};
if (options) {
$.extend(settings, options);
}
return this.each(function() {
var $this = $(this);
this.settings = settings;
this.marker = true;
if (window.addEventListener) this.addEventListener('DOMMouseScroll', mouseScrolled, false);
this.onmousewheel = mouseScrolled;
this.onmousedown = mouseDown;
this.onmouseup = mouseUp;
this.onmousemove = mouseMove;
this.onmouseout = mouseOut;
this.zoomLevels = new Array(settings.zoomNumLevels);
for (var i = 0; i < settings.zoomNumLevels; ++i) {
var scale = calculateZoomScale(i, settings.zoomNumLevels, settings.zoomPoints);
this.zoomLevels[i] = scale;
}
resetTransform(this);
});
},
transformToBox : function(arguments) {
var $this = $(this);
var target = ($this)[0];
var x = arguments.x;
var y = arguments.y;
var factor = 0.9;
var width = arguments.width ? arguments.width : 1;
var height = arguments.height ? arguments.height : 1;
var divHeight = target.parentNode.clientHeight;
var divWidth = target.parentNode.clientWidth;
var aspectRatioGraph = height/width;
var aspectRatioDiv = divHeight/divWidth;
var scale = aspectRatioGraph > aspectRatioDiv ? (divHeight/height)*factor : (divWidth/width)*factor;
console.log("(" + x + "," + y + "," + width.toPrecision(4) + "," + height.toPrecision(4) + ")");
console.log("(rg:" + aspectRatioGraph.toPrecision(3) + ",rd:" + aspectRatioDiv.toPrecision(3) + "," + scale.toPrecision(3) + ")");
// Center
var scaledWidth = width*scale;
var scaledHeight = height*scale;
var sx = (divWidth - scaledWidth)/2 -scale*x;
var sy = (divHeight - scaledHeight)/2 -scale*y;
console.log("sx,sy:" + sx + "," + sy);
animateTransform(target, scale, sx, sy, 500);
},
attachNavigateModel : function(arguments) {
var $this = $(this);
var target = ($this)[0];
target.model = arguments;
if (target.model) {
var obj = {};
obj.scale = target.scale;
obj.height = target.parentNode.clientHeight;
obj.width = target.parentNode.clientWidth;
obj.x1 = target.translateX;
obj.y1 = target.translateY;
obj.x2 = obj.x1 + obj.height*obj.scale;
obj.y2 = obj.y1 + obj.width*obj.scale;
target.model.set({transform : obj});
}
}
};
// Main Constructor
$.fn.svgNavigate = function(method) {
if (methods[method]) {
return methods[method].apply(this, Array.prototype.slice.call(arguments, 1));
} else if (typeof method === 'object' || !method) {
return methods.init.apply(this, arguments);
} else {
$.error('Method ' + method + ' does not exist on svgNavigate');
}
};
})(jQuery);