- Author:
- David Nickerson <nickerso@users.sourceforge.net>
- Date:
- 2009-07-16 02:00:03+12:00
- Desc:
- the starting point for the HH tutorial example
- Permanent Source URI:
- https://models.fieldml.org/workspace/a1/rawfile/f6a8f90307388eb4b040ee3566b84d88b59247f7/dojo-presentation/js/dojo/dojox/sketch/Figure.js
dojo.provide("dojox.sketch.Figure");
dojo.experimental("dojox.sketch");
dojo.require("dojox.gfx");
dojo.require("dojox.sketch.UndoStack");
(function(){
var ta=dojox.sketch;
ta.tools={};
ta.registerTool=function(type, fn){ ta.tools[type]=fn; };
ta.Figure = function(){
var self=this;
var annCounter=1;
this.shapes=[];
this.image=null;
this.imageSrc=null;
this.size={ w:0, h:0 };
this.surface=null;
this.group=null;
this.node=null;
this.zoomFactor=1; // multiplier for zooming.
this.tools=null; // toolbar reference.
this.nextKey=function(){ return annCounter++; };
this.obj={}; // lookup table for shapes. Not keen on this solution.
this.initUndoStack();
// what is selected.
this.selected=[];
this.hasSelections=function(){ return this.selected.length>0 };
this.isSelected=function(obj){
for(var i=0; i<self.selected.length; i++){
if(self.selected[i]==obj){ return true; }
}
return false;
};
this.select=function(obj){
// TODO: deal with multiple vs. single selections.
if(!self.isSelected(obj)){
// force single select
self.clearSelections();
self.selected=[ obj ];
}
// force a bbox update, regardless
obj.setMode(ta.Annotation.Modes.View);
obj.setMode(ta.Annotation.Modes.Edit);
};
this.deselect=function(obj){
var idx=-1;
for(var i=0; i<self.selected.length; i++){
if(self.selected[i]==obj){
idx=i;
break;
}
}
if(idx>-1){
obj.setMode(ta.Annotation.Modes.View);
self.selected.splice(idx,1);
}
return obj;
};
this.clearSelections=function(){
for(var i=0; i<self.selected.length; i++){
self.selected[i].setMode(ta.Annotation.Modes.View);
}
self.selected=[];
};
this.replaceSelection=function(n, o){
if(!self.isSelected(o)){
self.select(n);
return;
}
var idx=-1;
for(var i=0; i<self.selected.length; i++){
if(self.selected[i]==o){
idx=i;
break;
}
}
if(idx>-1){
self.selected.splice(idx,1,n);
}
};
// for the drag and drop handlers.
this._c=null; // current shape
this._ctr=null; // container measurements
this._lp=null; // last position
this._action=null;
this._prevState=null;
this._startPoint=null; // test to record a move.
// if an object isn't selected and we're dragging anyways.
this._ctool=null; // hard code it.
this._start=null;
this._end=null;
this._absEnd=null;
this._cshape=null;
this._click=function(e){
if(self._c){
dojo.stopEvent(e);
return;
}
var o=self._fromEvt(e);
if(!o){
self.clearSelections();
dojo.stopEvent(e);
} else if(!o.setMode){
// skip me.
} else {
self.select(o);
}
};
this._dblclick=function(e){
var o=self._fromEvt(e);
if(o){
self.onDblClickShape(o,e);
}
};
this._keydown=function(e){
var prevent=false;
if(e.ctrlKey){
if(e.keyCode==90){ //ctrl+z
self.undo();
prevent = true;
}
else if(e.keyCode==89){ //ctrl+y
self.redo();
prevent = true;
}
}
if(e.keyCode==46 || e.keyCode==8){ //delete or backspace
self._delete(self.selected);
prevent = true;
}
if(prevent){
dojo.stopEvent(e);
}
};
// drag handlers.
this._md=function(e){
var o=self._fromEvt(e);
self._startPoint={ x:e.pageX, y:e.pageY };
var win = dijit.getDocumentWindow(self.node.ownerDocument);
// figure out the coordinates within the iframe
self._ctr=dojo._abs(self.node);
var scroll=dojo.withGlobal(win,dojo._docScroll);
self._ctr={x:self._ctr.x-scroll.x, y:self._ctr.y-scroll.y};
var X=e.clientX-self._ctr.x, Y=e.clientY-self._ctr.y;
self._lp={ x:X, y:Y };
// capture it separately
self._start={ x:X, y:Y };
self._end={ x:X, y:Y };
self._absEnd={ x:X, y:Y };
if(!o){
self.clearSelections();
self._ctool.onMouseDown(e);
}else{
if(o.type && o.type()!="Anchor"){
self.select(o);
}
o.beginEdit();
self._c=o;
}
};
this._mm=function(e){
if(!self._ctr){ return; }
var x=e.clientX-self._ctr.x;
var y=e.clientY-self._ctr.y;
var dx=x-self._lp.x;
var dy=y-self._lp.y;
self._absEnd={x:x, y:y};
if(self._c){
self._c.doChange({dx:Math.round(dx/self.zoomFactor), dy:Math.round(dy/self.zoomFactor)});
self._c.setBinding({dx:Math.round(dx/self.zoomFactor), dy:Math.round(dy/self.zoomFactor)});
self._lp={x:x, y:y};
} else {
self._end={x:dx, y:dy};
var rect={
x:Math.min(self._start.x,self._absEnd.x),
y:Math.min(self._start.y,self._absEnd.y),
width:Math.abs(self._start.x-self._absEnd.x),
height:Math.abs(self._start.y-self._absEnd.y)
}
self._ctool.onMouseMove(e,rect);
}
};
this._mu=function(e){
if(self._c){
// record the event.
self._c.endEdit();
}else{
self._ctool.onMouseUp(e);
}
// clear the stuff out.
self._c=self._ctr=self._lp=self._action=self._prevState=self._startPoint=null;
self._cshape=self._start=self._end=self._absEnd=null;
};
this._delete=function(arr,noundo){
for(var i=0; i<arr.length; i++){
//var before=arr[i].serialize();
if(!noundo){
arr[i].remove();
}
arr[i].setMode(ta.Annotation.Modes.View);
arr[i].destroy();
self.remove(arr[i]);
self._remove(arr[i]);
}
arr.splice(0,arr.length);
};
};
var p=ta.Figure.prototype;
p.initUndoStack=function(){
this.history=new ta.UndoStack(this);
};
p.setTool=function(/*dojox.sketch._Plugin*/t){
this._ctool=t;
};
p.onDblClickShape=function(shape,e){
if(shape['onDblClick']){
shape.onDblClick(e);
}
};
p.onCreateShape=function(shape){};
p.onBeforeCreateShape=function(shape){};
p.initialize=function(node){
this.node=node;
this.surface=dojox.gfx.createSurface(node, this.size.w, this.size.h);
this.surface.createRect({ x:0, y:0, width:this.size.w, height:this.size.h })
.setFill("white");
this.group=this.surface.createGroup();
// kill any dragging events.
this._cons=[];
this._cons.push(dojo.connect(this.node, "ondragstart", dojo, "stopEvent"));
this._cons.push(dojo.connect(this.node, "onselectstart", dojo, "stopEvent"));
// hook up the drag system.
this._cons.push(dojo.connect(this.surface.getEventSource(), 'onmousedown', this._md));
this._cons.push(dojo.connect(this.surface.getEventSource(), 'onmousemove', this._mm));
this._cons.push(dojo.connect(this.surface.getEventSource(), 'onmouseup', this._mu));
this._cons.push(dojo.connect(this.surface.getEventSource(), 'ondblclick', this._dblclick));
this._cons.push(dojo.connect(this.surface.getEventSource().ownerDocument, 'onkeydown', this._keydown));
// rect hack. Fcuking VML.
this.group.createRect({ x:0, y:0, width:this.size.w, height:this.size.h });
this.image=this.group.createImage({ width:this.size.w, height:this.size.h, src:this.imageSrc });
};
p.destroy=function(isLoading){
if(!this.node){ return; }
if(!isLoading){
if(this.history){ this.history.destroy(); }
if(this._subscribed){
dojo.unsubscribe(this._subscribed);
delete this._subscribed;
}
}
dojo.forEach(this._cons, dojo.disconnect);
this._cons=[];
this.node.removeChild(this.surface.getEventSource());
this.group=this.surface=null;
this.obj={};
this.shapes=[];
};
p.draw=function(){ };
p.zoom=function(pct){
// first get the new dimensions
this.zoomFactor=pct/100;
var w=this.size.w*this.zoomFactor;
var h=this.size.h*this.zoomFactor;
this.surface.setDimensions(w, h);
// then scale it.
this.group.setTransform(dojox.gfx.matrix.scale(this.zoomFactor, this.zoomFactor));
if(dojo.isIE){
this.image.rawNode.style.width=Math.max(w,this.size.w);
this.image.rawNode.style.height=Math.max(h,this.size.h);
}
//this.rect.setShape({width:w,height:h});
};
p.getFit=function(){
// assume fitting the parent node.
// var box=dojo.html.getContentBox(this.node.parentNode);
//the following should work under IE and FF, not sure about others though
var wF=(this.node.parentNode.clientWidth-5)/this.size.w;
var hF=(this.node.parentNode.clientHeight-5)/this.size.h;
return Math.min(wF, hF)*100;
};
p.unzoom=function(){
// restore original size.
this.zoomFactor=1;
this.surface.setDimensions(this.size.w, this.size.h);
this.group.setTransform();
};
// object registry for drag handling.
p._add=function(obj){ this.obj[obj._key]=obj; };
p._remove=function(obj){
if(this.obj[obj._key]){
delete this.obj[obj._key];
}
};
p._get=function(key){
if(key&&key.indexOf("bounding")>-1){
key=key.replace("-boundingBox","");
}
return this.obj[key];
};
p._fromEvt=function(e){
var key=e.target.id+"";
if(key.length==0){
// ancestor tree until you get to the end (meaning this.surface)
var p=e.target.parentNode;
var node=this.surface.getEventSource();
while(p && p.id.length==0 && p!=node){
p=p.parentNode;
}
key=p.id;
}
return this._get(key);
};
p.add=function(annotation){
for(var i=0; i<this.shapes.length; i++){
if(this.shapes[i]==annotation){ return true; }
}
this.shapes.push(annotation);
return true;
};
p.remove=function(annotation){
var idx=-1;
for(var i=0; i<this.shapes.length; i++){
if(this.shapes[i]==annotation){
idx=i;
break;
}
}
if(idx>-1){ this.shapes.splice(idx, 1); }
return annotation;
};
p.get=function(id){
for(var i=0; i<this.shapes.length; i++){
if(this.shapes[i].id==id) {
return this.shapes[i];
}
}
return null;
};
p.convert=function(ann, t){
// convert an existing annotation to a different kind of annotation
var ctor=t+"Annotation";
if(!ta[ctor]){ return; }
var type=ann.type(), id=ann.id, label=ann.label, mode=ann.mode, tokenId=ann.tokenId;
var start, end, control, transform;
switch(type){
case "Preexisting":
case "Lead":{
transform={dx:ann.transform.dx, dy:ann.transform.dy };
start={x:ann.start.x, y:ann.start.y};
end={x:ann.end.x, y:ann.end.y };
var cx=end.x-((end.x-start.x)/2);
var cy=end.y-((end.y-start.y)/2);
control={x:cx, y:cy};
break;
}
case "SingleArrow":
case "DoubleArrow":{
transform={dx:ann.transform.dx, dy:ann.transform.dy };
start={x:ann.start.x, y:ann.start.y};
end={x:ann.end.x, y:ann.end.y };
control={x:ann.control.x, y:ann.control.y};
break;
}
case "Underline":{
transform={dx:ann.transform.dx, dy:ann.transform.dy };
start={x:ann.start.x, y:ann.start.y};
control={x:start.x+50, y:start.y+50 };
end={x:start.x+100, y:start.y+100 };
break;
}
case "Brace":{ }
}
var n=new ta[ctor](this, id);
if(n.type()=="Underline"){
// special handling, since we never move the start point.
n.transform={dx:transform.dx+start.x, dy:transform.dy+start.y };
} else {
if(n.transform){ n.transform=transform; }
if(n.start){ n.start=start; }
}
if(n.end){ n.end=end; }
if(n.control){ n.control=control; }
n.label=label;
n.token=dojo.lang.shallowCopy(ann.token);
n.initialize();
this.replaceSelection(n, ann);
this._remove(ann);
this.remove(ann);
ann.destroy();
// this should do all the things we need it to do for getting it registered.
n.setMode(mode);
};
p.setValue=function(text){
var obj=dojox.xml.DomParser.parse(text);
var node=this.node;
this.load(obj,node);
this.zoom(this.zoomFactor*100); //zoom to orignal scale
};
p.load=function(obj, n){
// create from pseudo-DOM
if(this.surface){ this.destroy(true); }
var node=obj.documentElement; // should be either the document or the docElement
this.size={
w:parseFloat(node.getAttribute('width'),10),
h:parseFloat(node.getAttribute('height'),10)
};
var g=node.childrenByName("g")[0];
var img=g.childrenByName("image")[0];
this.imageSrc=img.getAttribute("xlink:href");
this.initialize(n);
// now let's do the annotations.
var ann=g.childrenByName("g");
for(var i=0; i<ann.length; i++){ this._loadAnnotation(ann[i]); }
if(this._loadDeferred){
this._loadDeferred.callback(this);
this._loadDeferred=null;
}
this.onLoad();
};
p.onLoad=function(){};
p._loadAnnotation=function(obj){
var ctor=obj.getAttribute('dojoxsketch:type')+"Annotation";
if(ta[ctor]){
var a=new ta[ctor](this, obj.id);
a.initialize(obj);
this.nextKey();
a.setMode(ta.Annotation.Modes.View);
this._add(a);
return a;
}
return null;
};
p.onUndo=function(){};
p.onBeforeUndo=function(){};
p.onRedo=function(){};
p.onBeforeRedo=function(){};
p.undo=function(){
if(this.history){
this.onBeforeUndo();
this.history.undo();
this.onUndo();
}
};
p.redo=function(){
if(this.history){
this.onBeforeRedo();
this.history.redo();
this.onRedo();
}
};
p.serialize=function(){
var s='<svg xmlns="http://www.w3.org/2000/svg" '
+ 'xmlns:xlink="http://www.w3.org/1999/xlink" '
+ 'xmlns:dojoxsketch="http://dojotoolkit.org/dojox/sketch" '
+ 'width="' + this.size.w + '" height="' + this.size.h + '">'
+ '<g>'
+ '<image xlink:href="' + this.imageSrc + '" x="0" y="0" width="'
+ this.size.w + '" height="' + this.size.h + '" />';
for(var i=0; i<this.shapes.length; i++){ s+= this.shapes[i].serialize(); }
s += '</g></svg>';
return s;
};
p.getValue=p.serialize;
})();
