summaryrefslogtreecommitdiff
path: root/includes/js/dojox/image/MagnifierLite.js
diff options
context:
space:
mode:
authormensonge <mensonge@b3834d28-1941-0410-a4f8-b48e95affb8f>2008-11-13 09:49:11 +0000
committermensonge <mensonge@b3834d28-1941-0410-a4f8-b48e95affb8f>2008-11-13 09:49:11 +0000
commite44a7e37b6c7b5961adaffc62b9042b8d442938e (patch)
tree95b67c356e93163467db2451f2b8cce84ed5d582 /includes/js/dojox/image/MagnifierLite.js
parenta62b9742ee5e28bcec6872d88f50f25b820914f6 (diff)
downloadsemanticscuttle-e44a7e37b6c7b5961adaffc62b9042b8d442938e.tar.gz
semanticscuttle-e44a7e37b6c7b5961adaffc62b9042b8d442938e.tar.bz2
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
Diffstat (limited to 'includes/js/dojox/image/MagnifierLite.js')
-rw-r--r--includes/js/dojox/image/MagnifierLite.js126
1 files changed, 126 insertions, 0 deletions
diff --git a/includes/js/dojox/image/MagnifierLite.js b/includes/js/dojox/image/MagnifierLite.js
new file mode 100644
index 0000000..2e37340
--- /dev/null
+++ b/includes/js/dojox/image/MagnifierLite.js
@@ -0,0 +1,126 @@
+if(!dojo._hasResource["dojox.image.MagnifierLite"]){ //_hasResource checks added by build. Do not use _hasResource directly in your code.
+dojo._hasResource["dojox.image.MagnifierLite"] = true;
+dojo.provide("dojox.image.MagnifierLite");
+dojo.experimental("dojox.image.MagnifierLite");
+
+dojo.require("dijit._Widget");
+
+dojo.declare("dojox.image.MagnifierLite",
+ [dijit._Widget],{
+ // summary: Adds magnification on a portion of an image element
+ //
+ // 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).
+ //
+ // The logic behind requiring the src image to be large is
+ // "it's going to be downloaded, anyway" so this method avoids
+ // having to make thumbnails and 2 http requests among other things.
+ //
+ // glassSize: Int
+ // the width and height of the bounding box
+ glassSize: 125,
+
+ // scale: Decimal
+ // the multiplier of the Mangification.
+ scale: 6,
+
+ postCreate: function(){
+ this.inherited(arguments);
+
+ // images are hard to make into workable templates, so just add outer overlay
+ // and skip using dijit._Templated
+ this._adjustScale();
+ this._createGlass();
+
+ this.connect(this.domNode,"onmouseenter","_showGlass");
+ this.connect(this.glassNode,"onmousemove","_placeGlass");
+ this.connect(this.img,"onmouseout","_hideGlass");
+
+ // when position of domNode changes, _adjustScale needs to run.
+ // window.resize isn't it always, FIXME:
+ this.connect(window,"onresize","_adjustScale");
+
+ },
+
+ _createGlass: function(){
+ // summary: make img and glassNode elements as children of the body
+
+ 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.img = dojo.doc.createElement('img');
+ this.glassNode.appendChild(this.img);
+ this.img.src = this.domNode.src;
+ // float the image around inside the .glassNode
+ with(this.img.style){
+ position = "relative";
+ top = 0; left = 0;
+ width = this._zoomSize.w+"px";
+ height = this._zoomSize.h+"px";
+ }
+
+ },
+
+ _adjustScale: function(){
+ // summary: update the calculations should this.scale change
+
+ this.offset = dojo.coords(this.domNode,true);
+ this._imageSize = { w: this.offset.w, h:this.offset.h };
+ this._zoomSize = {
+ w: this._imageSize.w * this.scale,
+ h: this._imageSize.h * this.scale
+ };
+ },
+
+ _showGlass: function(e){
+ // summary: show the overlay
+ this._placeGlass(e);
+ with(this.glassNode.style){
+ visibility = "visible";
+ display = "";
+ }
+
+ },
+
+ _hideGlass: function(e){
+ // summary: hide the overlay
+ this.glassNode.style.visibility = "hidden";
+ this.glassNode.style.display = "none";
+ },
+
+ _placeGlass: function(e){
+ // summary: position the overlay centered under the cursor
+
+ this._setImage(e);
+ var t = Math.floor(e.pageY - (this.glassSize/2));
+ var l = Math.floor(e.pageX - (this.glassSize/2));
+ dojo.style(this.glassNode,"top",t);
+ dojo.style(this.glassNode,"left",l);
+
+ },
+
+ _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);
+ with(this.img.style){
+ top = y+"px";
+ left = x+"px";
+ }
+
+ }
+
+});
+
+}