Hi Vishal,
I have used the following to track the cursor as related to inline SVG:
//---x,y offset values for svgDiv (no page scrolling)---
function findPos(obj)
{
var curleft = curtop = 0;
if (obj.offsetParent)
{
do {
curleft += obj.offsetLeft;
curtop += obj.offsetTop;
}
while (obj = obj.offsetParent);
return [curleft,curtop];
}
}
var xSVG
var ySVG
function showXY(evt)
{
var posX=findPos(svgDiv)[0]
var posY=findPos(svgDiv)[1]
//---if page scrolling y,x ----
var offsetY=document.documentElement.scrollTop
var offsetX=document.documentElement.scrollLeft
xSVG=evt.clientX-posX+offsetX
ySVG=evt.clientY-posY+offsetY
}
In order to drag from/across one viewPort and drop to another, where they each
have different viewBox values, is tricky but doable. You'll would use the
following SVG goodies:
1) nearestViewportElement()
2) getScreenCTM
3) SVGPoint
4) matrixTransform
5) inverse()
6) getCTM
Plus store the translation x,y value at each DragTarget.
Assume the DragTarget is the svg element that will be dragged from another
SVG/HTML parent within the HTML document and dropped into the desired SVG, i.e,
your map.svg (shown as mySVG below)
var DragTarget=null;
var Dragging = false;
var OffsetX = 0;
var OffsetY = 0;
var Pnt;
//---mouse down over svg element, determine Offset---
function startDrag(evt)
{
if(Dragging==false)
{
DragTarget=evt.target;
//---reference point to its respective viewport--
Pnt = DragTarget.nearestViewportElement.createSVGPoint();
Pnt.x = evt.clientX;
Pnt.y = evt.clientY;
//---elements in different(svg) viewports---
var sCTM = DragTarget.nearestViewportElement.getScreenCTM();
Pnt = Pnt.matrixTransform(sCTM.inverse());
OffsetX = Pnt.x - parseFloat(DragTarget.getAttribute("transX"));
OffsetY = Pnt.y - parseFloat(DragTarget.getAttribute("transY"));
Dragging=true;
}
}
//---onmousemove---
function drag(evt)
{
if(Dragging)
{
//---reference point to its respective viewport--
Pnt = DragTarget.nearestViewportElement.createSVGPoint();
Pnt.x = evt.clientX;
Pnt.y = evt.clientY;
//---elements in different(svg) viewports---
var sCTM = DragTarget.nearestViewportElement.getScreenCTM();
Pnt = Pnt.matrixTransform(sCTM.inverse());
Pnt.x -= OffsetX;
Pnt.y -= OffsetY;
//---retain values for next Offset---
DragTarget.setAttribute("transX", Pnt.x);
DragTarget.setAttribute("transY", Pnt.y);
DragTarget.setAttribute("transform", "translate(" + Pnt.x + ","
+ Pnt.y + ")");
}
}
//---mouseup: drop into new viewPort, and auto transform to its current
viewBox---
function stopDrag(evt)
{
mySVG.appendChild(DragTarget);
showXY(evt)
Pnt = mySVG.createSVGPoint();
Pnt.x =xSVG
Pnt.y =ySVG;
//---elements in different(svg) viewports---
var sCTM = DragTarget.nearestViewportElement.getCTM();
Pnt = Pnt.matrixTransform(sCTM.inverse());
Pnt.x -= OffsetX;
Pnt.y -= OffsetY;
DragTarget.setAttribute("transform", "translate(" + Pnt.x + ","
+ Pnt.y + ")");
Dragging = false;
DragTarget=null
OffsetX=0
OffsetY=0
}
I have used this in IE9, and it works nicely. I haven't tested it in other
browsers.
Regards,
Francis
--- In [email protected], "vishal_aegisisc" <vishal_aegisisc@...>
wrote:
>
> Dear Friends,
>
> i'm stuck with the below mentioned scenario,
>
> Following Implementations are done,
>
> 1) i'm loading svg in html division as shown below,
>
> $('#SvgDIV').svg({ loadURL: 'map.svg', onLoad: function () {
> // here i'm binding some functionalities with jquery
> }
> });
>
> here map.svg is representing a map
>
> 2) [Drag and Drop From HTML DIV To SVG]
>
> I have another html division i.e. <div id="pqr" class="drag"> <ul><li
> class="abc" image="xyz.svg">XYZ</li></ul> </div>
>
> here xyz.svg represents an element,And i'm placing/appending this element as
> an svg image tag on above map (i.e. mentioned in point-1),
> To accomplish that I'm dragging this <li> to above loaded svg map in "SvgDIV"
> division with the help of jQuery UI plugin.
>
> As a result,xyz.svg(element) that is binded with <li class="abc"> will be
> appended as an svg image tag in map.svg (map) on the drop event of <li>
>
>
> 3) [Drag and Drop From SVG To SVG]
>
> Drag & Drop of svg element(xyz.svg) in map.svg(map) with the help of jQuery
> UI plugin only.
>
>
> 4) SVG Zoom in out functionality without panning by playing with Viewbox
> coordinates of root element of map SVG i.e. map.svg,
>
> Implemented Point 3 & 4 are Drag and Drop without zooming in/out the map,that
> means map is in its original size and position
> when we are making Drag/Drop From SVG To SVG and From HTML DIV to SVG,
> the issue is with drag and drop of an element along with zoom in/out of the
> map
>
> Issue 1 : Is it possible/feasible If I want to drag & drop element(xyz.svg)
> on map(map.svg) at the time of ZOOM IN IS APPLIED ON THE MAP?
> and if it is correct approach/possible then how to get correct
> position/actual coordinates of element
> in map on drop event of that svg element? (Please suggest any possible way to
> achieve this)
>
> Issue 2 : When i try to drag element from map and drop it to the map only
> that time also getting problem to get actual position/coordinates of element
> on map
>
> Please suggest the possible ways to get rid of it.
>
> Regards,
> Vishal
>
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