1 files changed, 721 insertions, 0 deletions
diff --git a/js/dojo/dojox/mobile/app/ImageView.js b/js/dojo/dojox/mobile/app/ImageView.js
new file mode 100644
index 0000000..d27bdf7
--- /dev/null
+++ b/js/dojo/dojox/mobile/app/ImageView.js
@@ -0,0 +1,721 @@
+//>>built
+// wrapped by build app
+define("dojox/mobile/app/ImageView", ["dijit","dojo","dojox","dojo/require!dojox/mobile/app/_Widget,dojo/fx/easing"], function(dijit,dojo,dojox){
+dojo.provide("dojox.mobile.app.ImageView");
+dojo.experimental("dojox.mobile.app.ImageView");
+dojo.require("dojox.mobile.app._Widget");
+
+dojo.require("dojo.fx.easing");
+
+dojo.declare("dojox.mobile.app.ImageView", dojox.mobile.app._Widget, {
+
+	// zoom: Number
+	//		The current level of zoom.  This should not be set manually.
+	zoom: 1,
+
+	// zoomCenterX: Number
+	//		The X coordinate in the image where the zoom is focused
+	zoomCenterX: 0,
+
+	// zoomCenterY: Number
+	//		The Y coordinate in the image where the zoom is focused
+	zoomCenterY: 0,
+
+	// maxZoom: Number
+	//		The highest degree to which an image can be zoomed.  For example,
+	//		a maxZoom of 5 means that the image will be 5 times larger than normal
+	maxZoom: 5,
+
+	// autoZoomLevel: Number
+	//		The degree to which the image is zoomed when auto zoom is invoked.
+	//		The higher the number, the more the image is zoomed in.
+	autoZoomLevel: 3,
+
+	// disableAutoZoom: Boolean
+	//		Disables auto zoom
+	disableAutoZoom: false,
+
+	// disableSwipe: Boolean
+	//		Disables the users ability to swipe from one image to the next.
+	disableSwipe: false,
+
+	// autoZoomEvent: String
+	//		Overrides the default event listened to which invokes auto zoom
+	autoZoomEvent: null,
+
+	// _leftImg: Node
+	//		The full sized image to the left
+	_leftImg: null,
+
+	// _centerImg: Node
+	//		The full sized image in the center
+	_centerImg: null,
+
+	// _rightImg: Node
+	//		The full sized image to the right
+	_rightImg: null,
+
+	// _leftImg: Node
+	//		The small sized image to the left
+	_leftSmallImg: null,
+
+	// _centerImg: Node
+	//		The small sized image in the center
+	_centerSmallImg: null,
+
+	// _rightImg: Node
+	//		The small sized image to the right
+	_rightSmallImg: null,
+
+	constructor: function(){
+
+		this.panX = 0;
+		this.panY = 0;
+
+		this.handleLoad = dojo.hitch(this, this.handleLoad);
+		this._updateAnimatedZoom = dojo.hitch(this, this._updateAnimatedZoom);
+		this._updateAnimatedPan = dojo.hitch(this, this._updateAnimatedPan);
+		this._onAnimPanEnd = dojo.hitch(this, this._onAnimPanEnd);
+	},
+
+	buildRendering: function(){
+		this.inherited(arguments);
+
+		this.canvas = dojo.create("canvas", {}, this.domNode);
+
+		dojo.addClass(this.domNode, "mblImageView");
+	},
+
+	postCreate: function(){
+		this.inherited(arguments);
+
+		this.size = dojo.marginBox(this.domNode);
+
+		dojo.style(this.canvas, {
+			width: this.size.w + "px",
+			height: this.size.h + "px"
+		});
+		this.canvas.height = this.size.h;
+		this.canvas.width = this.size.w;
+
+		var _this = this;
+
+		// Listen to the mousedown/touchstart event.  Record the position
+		// so we can use it to pan the image.
+		this.connect(this.domNode, "onmousedown", function(event){
+			if(_this.isAnimating()){
+				return;
+			}
+			if(_this.panX){
+				_this.handleDragEnd();
+			}
+
+			_this.downX = event.targetTouches ? event.targetTouches[0].clientX : event.clientX;
+			_this.downY = event.targetTouches ? event.targetTouches[0].clientY : event.clientY;
+		});
+
+		// record the movement of the mouse.
+		this.connect(this.domNode, "onmousemove", function(event){
+			if(_this.isAnimating()){
+				return;
+			}
+			if((!_this.downX && _this.downX !== 0) || (!_this.downY && _this.downY !== 0)){
+				// If the touch didn't begin on this widget, ignore the movement
+				return;
+			}
+
+			if((!_this.disableSwipe && _this.zoom == 1)
+				|| (!_this.disableAutoZoom && _this.zoom != 1)){
+				var x = event.targetTouches ?
+							event.targetTouches[0].clientX : event.pageX;
+				var y = event.targetTouches ?
+							event.targetTouches[0].clientY : event.pageY;
+
+				_this.panX = x - _this.downX;
+				_this.panY = y - _this.downY;
+
+				if(_this.zoom == 1){
+					// If not zoomed in, then try to move to the next or prev image
+					// but only if the mouse has moved more than 10 pixels
+					// in the X direction
+					if(Math.abs(_this.panX) > 10){
+						_this.render();
+					}
+				}else{
+					// If zoomed in, pan the image if the mouse has moved more
+					// than 10 pixels in either direction.
+					if(Math.abs(_this.panX) > 10 || Math.abs(_this.panY) > 10){
+						_this.render();
+					}
+				}
+			}
+		});
+
+		this.connect(this.domNode, "onmouseout", function(event){
+			if(!_this.isAnimating() && _this.panX){
+				_this.handleDragEnd();
+			}
+		});
+
+		this.connect(this.domNode, "onmouseover", function(event){
+			_this.downX = _this.downY = null;
+		});
+
+		// Set up AutoZoom, which zooms in a fixed amount when the user taps
+		// a part of the canvas
+		this.connect(this.domNode, "onclick", function(event){
+			if(_this.isAnimating()){
+				return;
+			}
+			if(_this.downX == null || _this.downY == null){
+				return;
+			}
+
+			var x = (event.targetTouches ?
+						event.targetTouches[0].clientX : event.pageX);
+			var y = (event.targetTouches ?
+						event.targetTouches[0].clientY : event.pageY);
+
+			// If the mouse/finger has moved more than 14 pixels from where it
+			// started, do not treat it as a click.  It is a drag.
+			if(Math.abs(_this.panX) > 14 || Math.abs(_this.panY) > 14){
+				_this.downX = _this.downY = null;
+				_this.handleDragEnd();
+				return;
+			}
+			_this.downX = _this.downY = null;
+
+			if(!_this.disableAutoZoom){
+
+				if(!_this._centerImg || !_this._centerImg._loaded){
+					// Do nothing until the image is loaded
+					return;
+				}
+				if(_this.zoom != 1){
+					_this.set("animatedZoom", 1);
+					return;
+				}
+
+				var pos = dojo._abs(_this.domNode);
+
+				// Translate the clicked point to a point on the source image
+				var xRatio = _this.size.w / _this._centerImg.width;
+				var yRatio = _this.size.h / _this._centerImg.height;
+
+				// Do an animated zoom to the point which was clicked.
+				_this.zoomTo(
+					((x - pos.x) / xRatio) - _this.panX,
+					((y - pos.y) / yRatio) - _this.panY,
+					_this.autoZoomLevel);
+			}
+		});
+
+		// Listen for Flick events
+		dojo.connect(this.domNode, "flick", this, "handleFlick");
+	},
+
+	isAnimating: function(){
+		// summary:
+		//		Returns true if an animation is in progress, false otherwise.
+		return this._anim && this._anim.status() == "playing";
+	},
+
+	handleDragEnd: function(){
+		// summary:
+		//		Handles the end of a dragging event. If not zoomed in, it
+		//		determines if the next or previous image should be transitioned
+		//		to.
+		this.downX = this.downY = null;
+		console.log("handleDragEnd");
+
+		if(this.zoom == 1){
+			if(!this.panX){
+				return;
+			}
+
+			var leftLoaded = (this._leftImg && this._leftImg._loaded)
+							|| (this._leftSmallImg && this._leftSmallImg._loaded);
+			var rightLoaded = (this._rightImg && this._rightImg._loaded)
+							|| (this._rightSmallImg && this._rightSmallImg._loaded);
+
+			// Check if the drag has moved the image more than half its length.
+			// If so, move to either the previous or next image.
+			var doMove =
+				!(Math.abs(this.panX) < this._centerImg._baseWidth / 2) &&
+				(
+					(this.panX > 0 && leftLoaded ? 1 : 0) ||
+					(this.panX < 0 && rightLoaded ? 1 : 0)
+				);
+
+
+			if(!doMove){
+				// If not moving to another image, animate the sliding of the
+				// image back into place.
+				this._animPanTo(0, dojo.fx.easing.expoOut, 700);
+			}else{
+				// Move to another image.
+				this.moveTo(this.panX);
+			}
+		}else{
+			if(!this.panX && !this.panY){
+				return;
+			}
+			// Recenter the zoomed image based on where it was panned to
+			// previously
+			this.zoomCenterX -= (this.panX / this.zoom);
+			this.zoomCenterY -= (this.panY / this.zoom);
+
+			this.panX = this.panY = 0;
+		}
+
+	},
+
+	handleFlick: function(event){
+		// summary:
+		//		Handle a flick event.
+		if(this.zoom == 1 && event.duration < 500){
+			// Only handle quick flicks here, less than 0.5 seconds
+
+			// If not zoomed in, then check if we should move to the next photo
+			// or not
+			if(event.direction == "ltr"){
+				this.moveTo(1);
+			}else if(event.direction == "rtl"){
+				this.moveTo(-1);
+			}
+			// If an up or down flick occurs, it means nothing so ignore it
+			this.downX = this.downY = null;
+		}
+	},
+
+	moveTo: function(direction){
+		direction = direction > 0 ? 1 : -1;
+		var toImg;
+
+		if(direction < 1){
+			if(this._rightImg && this._rightImg._loaded){
+				toImg = this._rightImg;
+			}else if(this._rightSmallImg && this._rightSmallImg._loaded){
+				toImg = this._rightSmallImg;
+			}
+		}else{
+			if(this._leftImg && this._leftImg._loaded){
+				toImg = this._leftImg;
+			}else if(this._leftSmallImg && this._leftSmallImg._loaded){
+				toImg = this._leftSmallImg;
+			}
+		}
+
+		this._moveDir = direction;
+		var _this = this;
+
+		if(toImg && toImg._loaded){
+			// If the image is loaded, make a linear animation to show it
+			this._animPanTo(this.size.w * direction, null, 500, function(){
+				_this.panX = 0;
+				_this.panY = 0;
+
+				if(direction < 0){
+					// Moving to show the right image
+					_this._switchImage("left", "right");
+				}else{
+					// Moving to show the left image
+					_this._switchImage("right", "left");
+				}
+
+				_this.render();
+				_this.onChange(direction * -1);
+			});
+
+		}else{
+			// If the next image is not loaded, make an animation to
+			// move the center image to half the width of the widget and back
+			// again
+
+			console.log("moveTo image not loaded!", toImg);
+
+			this._animPanTo(0, dojo.fx.easing.expoOut, 700);
+		}
+	},
+
+	_switchImage: function(toImg, fromImg){
+		var toSmallImgName = "_" + toImg + "SmallImg";
+		var toImgName = "_" + toImg + "Img";
+
+		var fromSmallImgName = "_" + fromImg + "SmallImg";
+		var fromImgName = "_" + fromImg + "Img";
+
+		this[toImgName] = this._centerImg;
+		this[toSmallImgName] = this._centerSmallImg;
+
+		this[toImgName]._type = toImg;
+
+		if(this[toSmallImgName]){
+			this[toSmallImgName]._type = toImg;
+		}
+
+		this._centerImg = this[fromImgName];
+		this._centerSmallImg = this[fromSmallImgName];
+		this._centerImg._type = "center";
+
+		if(this._centerSmallImg){
+			this._centerSmallImg._type = "center";
+		}
+		this[fromImgName] = this[fromSmallImgName] = null;
+	},
+
+	_animPanTo: function(to, easing, duration, callback){
+		this._animCallback = callback;
+		this._anim = new dojo.Animation({
+			curve: [this.panX, to],
+			onAnimate: this._updateAnimatedPan,
+			duration: duration || 500,
+			easing: easing,
+			onEnd: this._onAnimPanEnd
+		});
+
+		this._anim.play();
+		return this._anim;
+	},
+
+	onChange: function(direction){
+		// summary:
+		//		Stub function that can be listened to in order to provide
+		//		new images when the displayed image changes
+	},
+
+	_updateAnimatedPan: function(amount){
+		this.panX = amount;
+		this.render();
+	},
+
+	_onAnimPanEnd: function(){
+		this.panX = this.panY = 0;
+
+		if(this._animCallback){
+			this._animCallback();
+		}
+	},
+
+	zoomTo: function(centerX, centerY, zoom){
+		this.set("zoomCenterX", centerX);
+		this.set("zoomCenterY", centerY);
+
+		this.set("animatedZoom", zoom);
+	},
+
+	render: function(){
+		var cxt = this.canvas.getContext('2d');
+
+		cxt.clearRect(0, 0, this.canvas.width, this.canvas.height);
+
+		// Render the center image
+		this._renderImg(
+			this._centerSmallImg,
+			this._centerImg,
+			this.zoom == 1 ? (this.panX < 0 ? 1 : this.panX > 0 ? -1 : 0) : 0);
+
+		if(this.zoom == 1 && this.panX != 0){
+			if(this.panX > 0){
+				// Render the left image, showing the right side of it
+				this._renderImg(this._leftSmallImg, this._leftImg, 1);
+			}else{
+				// Render the right image, showing the left side of it
+				this._renderImg(this._rightSmallImg, this._rightImg, -1);
+			}
+		}
+	},
+
+	_renderImg: function(smallImg, largeImg, panDir){
+		// summary:
+		//		Renders a single image
+
+
+		// If zoomed, we just display the center img
+		var img = (largeImg && largeImg._loaded) ? largeImg : smallImg;
+
+		if(!img || !img._loaded){
+			// If neither the large or small image is loaded, display nothing
+			return;
+		}
+		var cxt = this.canvas.getContext('2d');
+
+		var baseWidth = img._baseWidth;
+		var baseHeight = img._baseHeight;
+
+		// Calculate the size the image would be if there were no bounds
+		var desiredWidth = baseWidth * this.zoom;
+		var desiredHeight = baseHeight * this.zoom;
+
+		// Calculate the actual size of the viewable image
+		var destWidth = Math.min(this.size.w, desiredWidth);
+		var destHeight = Math.min(this.size.h, desiredHeight);
+
+
+		// Calculate the size of the window on the original image to use
+		var sourceWidth = this.dispWidth = img.width * (destWidth / desiredWidth);
+		var sourceHeight = this.dispHeight = img.height * (destHeight / desiredHeight);
+
+		var zoomCenterX = this.zoomCenterX - (this.panX / this.zoom);
+		var zoomCenterY = this.zoomCenterY - (this.panY / this.zoom);
+
+		// Calculate where the center of the view should be
+		var centerX = Math.floor(Math.max(sourceWidth / 2,
+				Math.min(img.width - sourceWidth / 2, zoomCenterX)));
+		var centerY = Math.floor(Math.max(sourceHeight / 2,
+				Math.min(img.height - sourceHeight / 2, zoomCenterY)));
+
+
+		var sourceX = Math.max(0,
+			Math.round((img.width - sourceWidth)/2 + (centerX - img._centerX)) );
+		var sourceY = Math.max(0,
+			Math.round((img.height - sourceHeight) / 2 + (centerY - img._centerY))
+						);
+
+		var destX = Math.round(Math.max(0, this.canvas.width - destWidth)/2);
+		var destY = Math.round(Math.max(0, this.canvas.height - destHeight)/2);
+
+		var oldDestWidth = destWidth;
+		var oldSourceWidth = sourceWidth;
+
+		if(this.zoom == 1 && panDir && this.panX){
+
+			if(this.panX < 0){
+				if(panDir > 0){
+					// If the touch is moving left, and the right side of the
+					// image should be shown, then reduce the destination width
+					// by the absolute value of panX
+					destWidth -= Math.abs(this.panX);
+					destX = 0;
+				}else if(panDir < 0){
+					// If the touch is moving left, and the left side of the
+					// image should be shown, then set the displayed width
+					// to the absolute value of panX, less some pixels for
+					// a padding between images
+					destWidth = Math.max(1, Math.abs(this.panX) - 5);
+					destX = this.size.w - destWidth;
+				}
+			}else{
+				if(panDir > 0){
+					// If the touch is moving right, and the right side of the
+					// image should be shown, then set the destination width
+					// to the absolute value of the pan, less some pixels for
+					// padding
+					destWidth = Math.max(1, Math.abs(this.panX) - 5);
+					destX = 0;
+				}else if(panDir < 0){
+					// If the touch is moving right, and the left side of the
+					// image should be shown, then reduce the destination width
+					// by the widget width minus the absolute value of panX
+					destWidth -= Math.abs(this.panX);
+					destX = this.size.w - destWidth;
+				}
+			}
+
+			sourceWidth = Math.max(1,
+						Math.floor(sourceWidth * (destWidth / oldDestWidth)));
+
+			if(panDir > 0){
+				// If the right side of the image should be displayed, move
+				// the sourceX to be the width of the image minus the difference
+				// between the original sourceWidth and the new sourceWidth
+				sourceX = (sourceX + oldSourceWidth) - (sourceWidth);
+			}
+			sourceX = Math.floor(sourceX);
+		}
+
+		try{
+
+			// See https://developer.mozilla.org/en/Canvas_tutorial/Using_images
+			cxt.drawImage(
+				img,
+				Math.max(0, sourceX),
+				sourceY,
+				Math.min(oldSourceWidth, sourceWidth),
+				sourceHeight,
+				destX, 	// Xpos
+				destY, // Ypos
+				Math.min(oldDestWidth, destWidth),
+				destHeight
+			);
+		}catch(e){
+			console.log("Caught Error",e,
+
+					"type=", img._type,
+					"oldDestWidth = ", oldDestWidth,
+					"destWidth", destWidth,
+					"destX", destX
+					, "oldSourceWidth=",oldSourceWidth,
+					"sourceWidth=", sourceWidth,
+					"sourceX = " + sourceX
+			);
+		}
+	},
+
+	_setZoomAttr: function(amount){
+		this.zoom = Math.min(this.maxZoom, Math.max(1, amount));
+
+		if(this.zoom == 1
+				&& this._centerImg
+				&& this._centerImg._loaded){
+
+			if(!this.isAnimating()){
+				this.zoomCenterX = this._centerImg.width / 2;
+				this.zoomCenterY = this._centerImg.height / 2;
+			}
+			this.panX = this.panY = 0;
+		}
+
+		this.render();
+	},
+
+	_setZoomCenterXAttr: function(value){
+		if(value != this.zoomCenterX){
+			if(this._centerImg && this._centerImg._loaded){
+				value = Math.min(this._centerImg.width, value);
+			}
+			this.zoomCenterX = Math.max(0, Math.round(value));
+		}
+	},
+
+	_setZoomCenterYAttr: function(value){
+		if(value != this.zoomCenterY){
+			if(this._centerImg && this._centerImg._loaded){
+				value = Math.min(this._centerImg.height, value);
+			}
+			this.zoomCenterY = Math.max(0, Math.round(value));
+		}
+	},
+
+	_setZoomCenterAttr: function(value){
+		if(value.x != this.zoomCenterX || value.y != this.zoomCenterY){
+			this.set("zoomCenterX", value.x);
+			this.set("zoomCenterY", value.y);
+			this.render();
+		}
+	},
+
+	_setAnimatedZoomAttr: function(amount){
+		if(this._anim && this._anim.status() == "playing"){
+			return;
+		}
+
+		this._anim = new dojo.Animation({
+			curve: [this.zoom, amount],
+			onAnimate: this._updateAnimatedZoom,
+			onEnd: this._onAnimEnd
+		});
+
+		this._anim.play();
+	},
+
+	_updateAnimatedZoom: function(amount){
+		this._setZoomAttr(amount);
+	},
+
+	_setCenterUrlAttr: function(urlOrObj){
+		this._setImage("center", urlOrObj);
+	},
+	_setLeftUrlAttr: function(urlOrObj){
+		this._setImage("left", urlOrObj);
+	},
+	_setRightUrlAttr: function(urlOrObj){
+		this._setImage("right", urlOrObj);
+	},
+
+	_setImage: function(name, urlOrObj){
+		var smallUrl = null;
+
+		var largeUrl = null;
+
+		if(dojo.isString(urlOrObj)){
+			// If the argument is a string, then just load the large url
+			largeUrl = urlOrObj;
+		}else{
+			largeUrl = urlOrObj.large;
+			smallUrl = urlOrObj.small;
+		}
+
+		if(this["_" + name + "Img"] && this["_" + name + "Img"]._src == largeUrl){
+			// Identical URL, ignore it
+			return;
+		}
+
+		// Just do the large image for now
+		var largeImg = this["_" + name + "Img"] = new Image();
+		largeImg._type = name;
+		largeImg._loaded = false;
+		largeImg._src = largeUrl;
+		largeImg._conn = dojo.connect(largeImg, "onload", this.handleLoad);
+
+		if(smallUrl){
+			// If a url to a small version of the image has been provided,
+			// load that image first.
+			var smallImg = this["_" + name + "SmallImg"] = new Image();
+			smallImg._type = name;
+			smallImg._loaded = false;
+			smallImg._conn = dojo.connect(smallImg, "onload", this.handleLoad);
+			smallImg._isSmall = true;
+			smallImg._src = smallUrl;
+			smallImg.src = smallUrl;
+		}
+
+		// It's important that the large url's src is set after the small image
+		// to ensure it's loaded second.
+		largeImg.src = largeUrl;
+	},
+
+	handleLoad: function(evt){
+		// summary:
+		//		Handles the loading of an image, both the large and small
+		//		versions.  A render is triggered as a result of each image load.
+
+		var img = evt.target;
+		img._loaded = true;
+
+		dojo.disconnect(img._conn);
+
+		var type = img._type;
+
+		switch(type){
+			case "center":
+				this.zoomCenterX = img.width / 2;
+				this.zoomCenterY = img.height / 2;
+				break;
+		}
+
+		var height = img.height;
+		var width = img.width;
+
+		if(width / this.size.w < height / this.size.h){
+			// Fit the height to the height of the canvas
+			img._baseHeight = this.canvas.height;
+			img._baseWidth = width / (height / this.size.h);
+		}else{
+			// Fix the width to the width of the canvas
+			img._baseWidth = this.canvas.width;
+			img._baseHeight = height / (width / this.size.w);
+		}
+		img._centerX = width / 2;
+		img._centerY = height / 2;
+
+		this.render();
+
+		this.onLoad(img._type, img._src, img._isSmall);
+	},
+
+	onLoad: function(type, url, isSmall){
+		// summary:
+		//		Dummy function that is called whenever an image loads.
+		// type: String
+		//		The position of the image that has loaded, either
+		//		"center", "left" or "right"
+		// url: String
+		//		The src of the image
+		// isSmall: Boolean
+		//		True if it is a small version of the image that has loaded,
+		//		false otherwise.
+	}
+});
+
+});