From e44a7e37b6c7b5961adaffc62b9042b8d442938e Mon Sep 17 00:00:00 2001
From: mensonge <mensonge@b3834d28-1941-0410-a4f8-b48e95affb8f>
Date: Thu, 13 Nov 2008 09:49:11 +0000
Subject: New feature: basic Ajax suggestion for tags and implementation of
 Dojo toolkit

git-svn-id: https://semanticscuttle.svn.sourceforge.net/svnroot/semanticscuttle/trunk@151 b3834d28-1941-0410-a4f8-b48e95affb8f
---
 includes/js/dojox/image/Magnifier.js | 75 ++++++++++++++++++++++++++++++++++++
 1 file changed, 75 insertions(+)
 create mode 100644 includes/js/dojox/image/Magnifier.js

(limited to 'includes/js/dojox/image/Magnifier.js')

diff --git a/includes/js/dojox/image/Magnifier.js b/includes/js/dojox/image/Magnifier.js
new file mode 100644
index 0000000..b6a3923
--- /dev/null
+++ b/includes/js/dojox/image/Magnifier.js
@@ -0,0 +1,75 @@
+if(!dojo._hasResource["dojox.image.Magnifier"]){ //_hasResource checks added by build. Do not use _hasResource directly in your code.
+dojo._hasResource["dojox.image.Magnifier"] = true;
+dojo.provide("dojox.image.Magnifier");
+
+dojo.require("dojox.gfx");
+dojo.require("dojox.image.MagnifierLite");
+
+dojo.declare("dojox.image.Magnifier",
+	[dojox.image.MagnifierLite],{
+	// summary:	Adds magnification on a portion of an image element, using dojox.gfx
+	//
+	// description: An unobtrusive way to add an unstyled overlay
+	// 		above the srcNode image element. The overlay/glass is a 
+	//		scaled version of the src image (so larger images sized down
+	//		are clearer).
+	//
+	//		over-ride the _createGlass method to create your custom surface,
+	//		being sure to create an img node on that surface.
+
+	_createGlass: function(){
+		// summary: create the glassNode, and an img on a dojox.gfx surface
+
+		// images are hard to make into workable templates, so just add outer overlay
+		// and skip using dijit._Templated
+		this.glassNode = dojo.doc.createElement('div');
+		this.surfaceNode = this.glassNode.appendChild(dojo.doc.createElement('div'));
+
+		dojo.addClass(this.glassNode,"glassNode");
+		dojo.body().appendChild(this.glassNode);
+
+		with(this.glassNode.style){
+			height = this.glassSize + "px";
+			width = this.glassSize + "px";
+		}
+		
+		this.surface = dojox.gfx.createSurface(this.surfaceNode, this.glassSize, this.glassSize);
+		this.img = this.surface.createImage({
+		   src:this.domNode.src,
+		   width:this._zoomSize.w,
+		   height:this._zoomSize.h
+		});
+
+	},
+
+	_placeGlass: function(e){
+		// summary: position the overlay centered under the cursor
+		var x = e.pageX - 2;
+		var y = e.pageY - 2 ;
+		var xMax = this.offset.x + this.offset.w + 2;
+		var yMax = this.offset.y + this.offset.h + 2;
+		
+		// with svg, our mouseout connection to the image surface doesn't
+		// fire, so we'r have to manually calculate offsets	
+		if(x<this.offset.x || y<this.offset.y || x>xMax || y>yMax){
+			this._hideGlass();
+		}else{
+			this.inherited(arguments);
+		}
+	},
+
+	_setImage: function(e){
+		// summary: set the image's offset in the clipping window relative to the mouse position
+
+		var xOff = (e.pageX - this.offset.l) / this.offset.w;
+		var yOff = (e.pageY - this.offset.t) / this.offset.h;
+		var x = (this._zoomSize.w * xOff * -1)+(this.glassSize*xOff);
+		var y = (this._zoomSize.h * yOff * -1)+(this.glassSize*yOff);
+		// set the image offset
+		this.img.setShape({ x: x, y:y });	
+
+	}
+
+});
+
+}
-- 
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