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Adding a PinchZoom control for smooth zooming on multi-touch devices. p=bbinet,me r=crschmidt (closes #3105)

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git-svn-id: http://svn.openlayers.org/trunk/openlayers@11544 dc9f47b5-9b13-0410-9fdd-eb0c1a62fdaf
This commit is contained in:
Tim Schaub
2011-02-26 02:22:45 +00:00
parent 1425c2b0e6
commit f785153bca
7 changed files with 326 additions and 9 deletions
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18
lib/OpenLayers/Events.js
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@@ -821,10 +821,20 @@ OpenLayers.Events = OpenLayers.Class({
// noone's listening, bail out
return;
}
// add clientX & clientY to all events - only corresponds to the first touch
if (evt.touches && evt.touches[0]) {
evt.clientX = evt.touches[0].clientX;
evt.clientY = evt.touches[0].clientY;
// add clientX & clientY to all events - corresponds to average x, y
var touches = evt.touches;
if (touches && touches[0]) {
var x = 0;
var y = 0;
var num = touches.length;
var touch;
for (var i=0; i<num; ++i) {
touch = touches[i];
x += touch.clientX;
y += touch.clientY;
}
evt.clientX = x / num;
evt.clientY = y / num;
}
if (this.includeXY) {
evt.xy = this.getMousePosition(evt);