I am working on a SVG web application & having a tough time figuring this one
out.
The functionality I want to achieve allows the user to draw (with the mouse) a
rectangle around objects already placed on the screen. When two or more objects
are under this drawn rectangle, they get grouped together, and then upon
mousedown (event) inside the drawn rectangle, the user can drag the selected
objects in unison.
I have been able to statically grouped elements together but am struggling with
the dynamic aspect, i.e. when the user selects the object, only then should
they be grouped together & once the the user clicks outside the drawn box, the
grouping ends & each objects again becomes independent.
here is some code.....
var far=document.getElementById("oo")
far.addEventListener("load", function (){
var svgDoc=far.contentDocument;
var svgRoot=svgDoc.documentElement;
document.getElementById("bar").onclick=function(){
var g =
svgDoc.createElementNS("http://www.w3.org/2000/svg";, "g");
g.setAttribute('id', 'group');
g.setAttribute('shape-rendering', 'inherit');
g.setAttribute('pointer-events', 'all');
var use =
svgDoc.createElementNS("http://www.w3.org/2000/svg";, "use")
use.setAttributeNS("http://www.w3.org/1999/xlink";,
"xlink:href", "#group")
use.setAttribute("id", "u")
svgRoot.appendChild(use)
var
create_bar=svgDoc.createElementNS("http://www.w3.org/2000/svg";, "rect")
create_bar.setAttribute("id", "r_bar")
create_bar.setAttribute("fill", "cream")
create_bar.setAttribute("x", "300px")
create_bar.setAttribute("y", "50px")
create_bar.setAttribute("width", "100px")
create_bar.setAttribute("height", "30px")
create_bar.setAttribute("pointer-events", "inherit")
g.appendChild(create_bar)
var cir =
svgDoc.createElementNS("http://www.w3.org/2000/svg";, "circle");
cir.setAttribute( "id","cir")
cir.setAttribute( "cx","320px")
cir.setAttribute( "cy","65px")
cir.setAttribute( "r","10px")
cir.setAttribute('fill', 'red')
cir.setAttribute('pointer-events', 'inherit')
g.appendChild(cir)
svgRoot.appendChild(g)
}
var btn_id=document.getElementById('bar2')
btn_id.onclick=function()
{
var a=svgDoc.getElementById('r_bar')
var b=svgDoc.getElementById('group')
var c=svgDoc.getElementById('cir')
var d=svgDoc.getElementById('u')
alert(a.id+".."+b.id+".."+c.id+".."+d.id)
}
},false)
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