silverstripe-cms/javascript/ImageEditor/Resizeable.js

/**
 * @author Mateusz
 */
ImageEditor.Resizeable = {
	
	initialize: function(element,options) {		
		this.resizeStop = options.resizeStop.bind(this);
		this.onDrag = options.onDrag.bind(this);
		this.customOnResize = options.onResize.bind(this);
		this.getMousePos = options.getMousePos.bind(this);
		this.bindAll = ImageEditor.Resizeable.bindAll.bind(this);
		this.bindAll();
		this.element = element;
		this.createClickBoxes();
		this.setListeners();
		this.originalHeight = 0;
		this.originalWidth = 0;
		this.isEnabled = true;
	},
	
	resizeStart: function(event) {
		if(Element.hasClassName(Event.element(event),'clickBox')) {
			ImageEditor.EventStack.addEvent(event);
			Event.stop(event);
		}
	},
	
	leftUpperDrag: function(event,top,left,height,width,parentTop,parentLeft,relativeMouseX,relativeMouseY,ratio) {
		var newHeight = top - relativeMouseY + height;
		var newWidth = Math.round(newHeight / ratio);
		if(this.resize(newWidth,newHeight)) { 
			this.element.style.top = top - (newHeight - height) + "px";
			this.element.style.left = left - (newWidth - width) + "px";
			if(parseInt(this.element.style.left) < 0) this.element.style.left = "1px";			
		}		
	},
	
	leftMiddleDrag: function(event,top,left,height,width,parentTop,parentLeft,relativeMouseX,relativeMouseY) {
		var newWidth = left - relativeMouseX + width;											 
		if(this.resize(newWidth,-1000)) this.element.style.left = left - (left - relativeMouseX) + "px";	
	},
	
	leftLowerDrag: function(event,top,left,height,width,parentTop,parentLeft,relativeMouseX,relativeMouseY,ratio) {
		var newHeight = relativeMouseY - (top + height) + height;
        var newWidth = Math.round(newHeight / ratio);
		if(this.resize(newWidth,newHeight)) {
		    this.element.style.left = left - (newWidth - width) + "px";
		    if(parseInt(this.element.style.left) < 0) this.element.style.left = "1px";
		}
	},
	
	rightUpperDrag: function(event,top,left,height,width,parentTop,parentLeft,relativeMouseX,relativeMouseY,ratio) {
        var newHeight = top - relativeMouseY + height;
        var newWidth = Math.round(newHeight / ratio);
        if(this.resize(newWidth,newHeight)) this.element.style.top = (top - (newHeight - height) ) + 'px';
	},
	
	rightMiddleDrag: function(event,top,left,height,width,parentTop,parentLeft,relativeMouseX,relativeMouseY) {
		var newWidth = relativeMouseX - left; 
		this.resize(newWidth,-1000);	
	},
	
	rightLowerDrag: function(event,top,left,height,width,parentTop,parentLeft,relativeMouseX,relativeMouseY,ratio) {
		var newHeight = relativeMouseY - top;
        var newWidth = Math.round(newHeight / ratio);
		this.resize(newWidth,newHeight);	
	},
	
	upperMiddleDrag: function(event,top,left,height,width,parentTop,parentLeft,relativeMouseX,relativeMouseY) {
		var newHeight = top - relativeMouseY + height; 
		if(this.resize(-1000,newHeight)) {
			this.element.style.top = (top - (newHeight - height)) + 'px';								
		}
	},
	
	lowerMiddleDrag: function(event,top,left,height,width,parentTop,parentLeft,relativeMouseX,relativeMouseY) {
		var newHeight = relativeMouseY - (top + height) + height;						
		this.resize(-1000,newHeight);
	},
	
	onResize: function(event) {		
		if(ImageEditor.EventStack.getLastEventElement() != null && this.isVisible && this.isEnabled) {					
		    var lastEventElement = ImageEditor.EventStack.getLastEventElement();
			var relativeMouseX = this.getMousePos(event).x - this.element.getParentLeft();
			var relativeMouseY = this.getMousePos(event).y - this.element.getParentTop();
			if(Element.hasClassName(lastEventElement,'leftUpperClickBox')) {
				this.leftUpperDrag(event,this.element.getTop(),this.element.getLeft(),this.element.getHeight(),this.element.getWidth(),this.element.getParentTop(),this.element.getParentLeft(),relativeMouseX,relativeMouseY,this.originalHeight/this.originalWidth);						
			}
			if(Element.hasClassName(lastEventElement,'leftMiddleClickBox')) {
				this.leftMiddleDrag(event,this.element.getTop(),this.element.getLeft(),this.element.getHeight(),this.element.getWidth(),this.element.getParentTop(),this.element.getParentLeft(),relativeMouseX,relativeMouseY);						
			}
			if(Element.hasClassName(lastEventElement,'leftLowerClickBox')) {
				this.leftLowerDrag(event,this.element.getTop(),this.element.getLeft(),this.element.getHeight(),this.element.getWidth(),this.element.getParentTop(),this.element.getParentLeft(),relativeMouseX,relativeMouseY,this.originalHeight/this.originalWidth);						
			}
			if(Element.hasClassName(lastEventElement,'rightUpperClickBox')) {
				this.rightUpperDrag(event,this.element.getTop(),this.element.getLeft(),this.element.getHeight(),this.element.getWidth(),this.element.getParentTop(),this.element.getParentLeft(),relativeMouseX,relativeMouseY,this.originalHeight/this.originalWidth);						
			}
			if(Element.hasClassName(lastEventElement,'rightMiddleClickBox')) {
				this.rightMiddleDrag(event,this.element.getTop(),this.element.getLeft(),this.element.getHeight(),this.element.getWidth(),this.element.getParentTop(),this.element.getParentLeft(),relativeMouseX,relativeMouseY);						
			}
			if(Element.hasClassName(lastEventElement,'rightLowerClickBox')) {
				this.rightLowerDrag(event,this.element.getTop(),this.element.getLeft(),this.element.getHeight(),this.element.getWidth(),this.element.getParentTop(),this.element.getParentLeft(),relativeMouseX,relativeMouseY,this.originalHeight/this.originalWidth);						
			}
			if(Element.hasClassName(lastEventElement,'upperMiddleClickBox')) {
				this.upperMiddleDrag(event,this.element.getTop(),this.element.getLeft(),this.element.getHeight(),this.element.getWidth(),this.element.getParentTop(),this.element.getParentLeft(),relativeMouseX,relativeMouseY);						
			}
			if(Element.hasClassName(lastEventElement,'lowerMiddleClickBox')) {
				this.lowerMiddleDrag(event,this.element.getTop(),this.element.getLeft(),this.element.getHeight(),this.element.getWidth(),this.element.getParentTop(),this.element.getParentLeft(),relativeMouseX,relativeMouseY);						
			}
			this.placeClickBox();
			this.customOnResize(this.element.getWidth(),this.element.getHeight());		
			ImageEditor.imageBox.reCenterIndicator();			
			Event.stop(event);
		}	
	},
	
	resize: function(width,height) {
		if(width < 35 && height == -1000) {
			return false;
		}
		if(height < 35 && width == -1000) {
			return false;
		}
		if((width < 35 || height < 35) && (width != -1000 && height != -1000)) {
			return false;
		}		
		if(width == -1000)	{ 			
			width = this.originalWidth;
		}
		if(height == -1000) {			
			height = this.originalHeight;
		}	
		if(!ImageEditor.crop.isVisible) {		
			$('image').style.width = width + 'px';
			$('image').style.height =  height + 'px';
		}
		this.element.style.width = width + "px";	
		this.element.style.height = height + "px";
		return true;		
	},
	
	placeClickBox: function(event) {
		if(event != null) {
			this.originalHeight = Element.getDimensions(this.element).height;
			this.originalWidth = Element.getDimensions(this.element).width;
		}
		var width = Element.getDimensions(this.element).width;
		var height = Element.getDimensions(this.element).height;
		var clickBoxHalfWidth =  Math.floor(Element.getDimensions(this.leftUpperClickBox2).width/2)+1;
		
		var leftUpper = new ImageEditor.Point.initialize(-clickBoxHalfWidth,-clickBoxHalfWidth);
		var leftMiddle = new ImageEditor.Point.initialize(-clickBoxHalfWidth,height/2-clickBoxHalfWidth);
		var leftLower = new ImageEditor.Point.initialize(-clickBoxHalfWidth,height-clickBoxHalfWidth);
		var rightUpper = new ImageEditor.Point.initialize(width-clickBoxHalfWidth,-clickBoxHalfWidth);
		var rightMiddle = new ImageEditor.Point.initialize(width-clickBoxHalfWidth,height/2-clickBoxHalfWidth);
		var rightLower = new ImageEditor.Point.initialize(width-clickBoxHalfWidth,height-clickBoxHalfWidth);
		var upperMiddle = new ImageEditor.Point.initialize(width/2-clickBoxHalfWidth,-clickBoxHalfWidth);
		var lowerMiddle = new ImageEditor.Point.initialize(width/2-clickBoxHalfWidth,height-clickBoxHalfWidth);
		
		this.leftUpperClickBox.style.left = leftUpper.x + 'px';
		this.leftUpperClickBox.style.top = leftUpper.y + 'px';
		this.leftUpperClickBox2.style.left = leftUpper.x + 'px';
		this.leftUpperClickBox2.style.top = leftUpper.y + 'px';
		this.leftMiddleClickBox.style.left = leftMiddle.x + 'px';
		this.leftMiddleClickBox.style.top = leftMiddle.y + 'px';
		this.leftLowerClickBox.style.left = leftLower.x + 'px';
		this.leftLowerClickBox.style.top = leftLower.y + 'px';		
		
		this.rightUpperClickBox.style.left = rightUpper.x + 'px';
		this.rightUpperClickBox.style.top = rightUpper.y + 'px';
		this.rightMiddleClickBox.style.left = rightMiddle.x + 'px';
		this.rightMiddleClickBox.style.top = rightMiddle.y + 'px';
		this.rightLowerClickBox.style.left = rightLower.x + 'px';
		this.rightLowerClickBox.style.top = rightLower.y + 'px';
		
		this.upperMiddleClickBox.style.left = upperMiddle.x + 'px';
		this.upperMiddleClickBox.style.top = upperMiddle.y + 'px';
		this.lowerMiddleClickBox.style.left = lowerMiddle.x + 'px';
		this.lowerMiddleClickBox.style.top = lowerMiddle.y + 'px';	
		
	},
	
	createClickBoxes: function() {
		this.leftUpperClickBox = this.createElement('div',ImageEditor.Random.string(5),["leftUpperClickBox","clickBox"]);
		this.leftMiddleClickBox = this.createElement('div',ImageEditor.Random.string(5),["leftMiddleClickBox","clickBox"]);
		this.leftLowerClickBox = this.createElement('div',ImageEditor.Random.string(5),["leftLowerClickBox","clickBox"]);
		this.rightUpperClickBox = this.createElement('div',ImageEditor.Random.string(5),["rightUpperClickBox","clickBox"]);
		this.rightMiddleClickBox = this.createElement('div',ImageEditor.Random.string(5),["rightMiddleClickBox","clickBox"]);
		this.rightLowerClickBox = this.createElement('div',ImageEditor.Random.string(5),["rightLowerClickBox","clickBox"]);
		this.upperMiddleClickBox = this.createElement('div',ImageEditor.Random.string(5),["upperMiddleClickBox","clickBox"]);
		this.lowerMiddleClickBox = this.createElement('div',ImageEditor.Random.string(5),["lowerMiddleClickBox","clickBox"]);		
		this.leftUpperClickBox2 = this.createElement('div',ImageEditor.Random.string(5),["leftUpperClickBox","clickBox"]);		
		//Safarai requires creating another clickbox because leftUppperClickBox is hidden (hack)
		
	},
	
	createElement: function(tag,id,classes) {
		var newElement = document.createElement(tag);
		newElement.id = id;
		classes.each(function(item) {
				Element.addClassName(newElement,item);		
			}
		);
		this.addListener(newElement);
		this.element.appendChild(newElement);
		return newElement;		
	},
	
	bindAll: function() {
		this.setListeners = ImageEditor.Resizeable.setListeners.bind(this);
		this.placeClickBox = ImageEditor.Resizeable.placeClickBox.bind(this);
		this.resizeStart = ImageEditor.Resizeable.resizeStart.bind(this);	
		this.onResize = ImageEditor.Resizeable.onResize.bind(this);
		this.resize = ImageEditor.Resizeable.resize.bind(this);
		this.createClickBoxes = ImageEditor.Resizeable.createClickBoxes.bind(this);
		this.createElement = ImageEditor.Resizeable.createElement.bind(this);
		this.addListener = ImageEditor.Resizeable.addListener.bind(this);
		this.addDraging = ImageEditor.Resizeable.addDraging.bind(this);
		this.setVisible = ImageEditor.Resizeable.setVisible.bind(this);
		this.removeDraging = ImageEditor.Resizeable.removeDraging.bind(this);
		this.disable = ImageEditor.Resizeable.disable.bind(this);
		this.enable = ImageEditor.Resizeable.enable.bind(this);
		
		this.leftUpperDrag = ImageEditor.Resizeable.leftUpperDrag.bind(this);
		this.leftMiddleDrag = ImageEditor.Resizeable.leftMiddleDrag.bind(this);
		this.leftLowerDrag = ImageEditor.Resizeable.leftLowerDrag.bind(this);		
		this.rightUpperDrag = ImageEditor.Resizeable.rightUpperDrag.bind(this);
		this.rightMiddleDrag = ImageEditor.Resizeable.rightMiddleDrag.bind(this);
		this.rightLowerDrag = ImageEditor.Resizeable.rightLowerDrag.bind(this);
		this.upperMiddleDrag = ImageEditor.Resizeable.upperMiddleDrag.bind(this);
		this.lowerMiddleDrag = ImageEditor.Resizeable.lowerMiddleDrag.bind(this);		
	},
	
	setListeners: function() {
		Event.observe('Main','mousemove',this.onResize);
		Event.observe('Main','mouseup',this.resizeStop);
	},
	
	addListener: function(element) {
		Event.observe(element,'mousedown',this.resizeStart);		
		Event.observe(element,'mousemove',this.onResize);		
		
	},	
	
	addDraging: function() {
		if(this.draggableImage) this.removeDraging();
		var options =  {
			starteffect: function() {},
			endeffect: function() {},
			change: this.onDrag
		};		
		this.draggableImage = new Draggable(this.element,options);
	},
	
	removeDraging: function() {
		if(this.draggableImage) {
			this.draggableImage.destroy();
			this.draggableImage = null;
		}
	},
	
	setVisible: function(setVisible) {
		this.isVisible = setVisible;
		if(setVisible) {
			Element.show(
				this.leftUpperClickBox,
				this.leftUpperClickBox2,
				this.leftMiddleClickBox,
				this.leftLowerClickBox,
				this.rightUpperClickBox,
				this.rightMiddleClickBox,
				this.rightLowerClickBox,
				this.upperMiddleClickBox,
				this.lowerMiddleClickBox);
			this.addDraging();
		} else {
			Element.hide(
				this.leftUpperClickBox,
				this.leftUpperClickBox2,
				this.leftMiddleClickBox,
				this.leftLowerClickBox,
				this.rightUpperClickBox,
				this.rightMiddleClickBox,
				this.rightLowerClickBox,
				this.upperMiddleClickBox,
				this.lowerMiddleClickBox);					
			this.removeDraging();
		}
	},
	
	disable: function() {
        this.isEnabled = false;   
	},
	
	enable: function() {
	   this.isEnabled = true;
	}
}