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I am working on a web based application where user can create multiple svg elements. all elements are 'path' (closed path either square or rectangle). User can move and rotate any element.
Now i want to alarm user when one element touches or intersect any other element .
any help would be appreciated.
thanks.
here is the jsfiddle linke http://jsfiddle.net/nnYSp/
Code is :-
<body>
<svg xmlns="http://www.w3.org/2000/svg" version="1.1" width="600" height="500">
<path id="obj1" d="M 100 50 L 150 50 150 120 100 120 z" stroke="black" stroke-width="2" fill="yellow" move transform="translate(10,0) rotate(45,125,85)"/>
<path id="obj2" d="M 150 150 L 200 150 200 200 150 200 z" stroke="red" stroke-width="2" fill="black" move transform="translate(10,0)"/>
</svg>
<script type="text/javascript">
document.addEventListener('mousedown', mousedown, false);
document.addEventListener('mousemove', mousemove, false);
document.addEventListener('mouseup', mouseup, false);
var obj1_rotate_string="rotate(45,125,85)";
var obj1_translate_values={
x:10,
y:0
}
var obj2_rotate_string="";
var obj2_translate_values={
x:10,
y:0
}
var mousedownFlag=false;
var mousedown={
x:0,
y:0
}
var targetObj={
t:null,
r:null,
obj:null
};
function mousedown(event){
if(event.target.hasAttribute('move')){
mousedownFlag=true;
mousedown.x=event.pageX;
mousedown.y=event.pageY;
var Obj=event.target.id;
if(Obj==='obj1'){
targetObj.obj='obj1'
}
else{
targetObj.obj='obj2'
}
}
}
function mousemove(event){
if(mousedownFlag){
var dx=event.pageX-mousedown.x;
var dy=event.pageY-mousedown.y;
if(targetObj.obj==='obj1'){
obj1_translate_values.x+=dx;
obj1_translate_values.y+=dy;
var obj=document.getElementById(targetObj.obj);
obj.setAttribute('transform', 'translate('+ obj1_translate_values.x+','+ obj1_translate_values.y+')'+ obj1_rotate_string);
}
else if(targetObj.obj==='obj2'){
obj2_translate_values.x+=dx;
obj2_translate_values.y+=dy;
var obj=document.getElementById(targetObj.obj);
obj.setAttribute('transform', 'translate('+ obj2_translate_values.x+','+ obj2_translate_values.y+')'+ obj2_rotate_string);
}
mousedown.x=event.pageX;
mousedown.y=event.pageY;
}
}
function mouseup(event){
mousedownFlag=false;
}
</script>
</body>
725
asked Sep 24 '13 04:09
The problem will be easier if your paths are closed squares or rectangles.
you can read the svg dom interface checkIntersection
boolean checkIntersection(in SVGElement element, in SVGRect rect);
135
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