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make drag handler work with touch events, p=lotsofpeople, r=tschaub (closes #2995)

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git-svn-id: http://svn.openlayers.org/trunk/openlayers@11189 dc9f47b5-9b13-0410-9fdd-eb0c1a62fdaf
This commit is contained in:
Éric Lemoine
2011-02-21 15:07:55 +00:00
parent 7a1cb00fe4
commit 07160f5385
3 changed files with 201 additions and 86 deletions
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255
lib/OpenLayers/Handler/Drag.js
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@@ -32,11 +32,11 @@ OpenLayers.Handler.Drag = OpenLayers.Class(OpenLayers.Handler, {
/**
* Property: started
* {Boolean} When a mousedown event is received, we want to record it, but
* not set 'dragging' until the mouse moves after starting.
* {Boolean} When a mousedown or touchstart event is received, we want to
* record it, but not set 'dragging' until the mouse moves after starting.
*/
started: false,
/**
* Property: stopDown
* {Boolean} Stop propagation of mousedown events from getting to listeners
@@ -131,11 +131,124 @@ OpenLayers.Handler.Drag = OpenLayers.Class(OpenLayers.Handler, {
}
},
/**
* Method: dragstart
* This private method is factorized from mousedown and touchstart methods
*
* Parameters:
* evt - {Event} The event
*
* Returns:
* {Boolean} Let the event propagate.
*/
dragstart: function (evt) {
var propagate = true;
this.dragging = false;
if (this.checkModifiers(evt) &&
(OpenLayers.Event.isLeftClick(evt) ||
OpenLayers.Event.isSingleTouch(evt))) {
this.started = true;
this.start = evt.xy;
this.last = evt.xy;
OpenLayers.Element.addClass(
this.map.viewPortDiv, "olDragDown"
);
this.down(evt);
this.callback("down", [evt.xy]);
OpenLayers.Event.stop(evt);
if(!this.oldOnselectstart) {
this.oldOnselectstart = document.onselectstart ?
document.onselectstart : OpenLayers.Function.True;
}
document.onselectstart = OpenLayers.Function.False;
propagate = !this.stopDown;
} else {
this.started = false;
this.start = null;
this.last = null;
}
return propagate;
},
/**
* Method: dragmove
* This private method is factorized from mousemove and touchmove methods
*
* Parameters:
* evt - {Event} The event
*
* Returns:
* {Boolean} Let the event propagate.
*/
dragmove: function (evt) {
if (this.started && !this.timeoutId && (evt.xy.x != this.last.x ||
evt.xy.y != this.last.y)) {
if(this.documentDrag === true && this.documentEvents) {
if(evt.element === document) {
this.adjustXY(evt);
// do setEvent manually because the documentEvents are not
// registered with the map
this.setEvent(evt);
} else {
this.removeDocumentEvents();
}
}
if (this.interval > 0) {
this.timeoutId = setTimeout(
OpenLayers.Function.bind(this.removeTimeout, this),
this.interval);
}
this.dragging = true;
this.move(evt);
this.callback("move", [evt.xy]);
if(!this.oldOnselectstart) {
this.oldOnselectstart = document.onselectstart;
document.onselectstart = OpenLayers.Function.False;
}
this.last = this.evt.xy;
}
return true;
},
/**
* Method: dragend
* This private method is factorized from mouseup and touchend methods
*
* Parameters:
* evt - {Event} The event
*
* Returns:
* {Boolean} Let the event propagate.
*/
dragend: function (evt) {
if (this.started) {
if(this.documentDrag === true && this.documentEvents) {
this.adjustXY(evt);
this.removeDocumentEvents();
}
var dragged = (this.start != this.last);
this.started = false;
this.dragging = false;
OpenLayers.Element.removeClass(
this.map.viewPortDiv, "olDragDown"
);
this.up(evt);
this.callback("up", [evt.xy]);
if(dragged) {
this.callback("done", [evt.xy]);
}
document.onselectstart = this.oldOnselectstart;
}
return true;
},
/**
* The four methods below (down, move, up, and out) are used by subclasses
* to do their own processing related to these mouse events.
*/
/**
* Method: down
* This method is called during the handling of the mouse down event.
@@ -146,7 +259,7 @@ OpenLayers.Handler.Drag = OpenLayers.Class(OpenLayers.Handler, {
*/
down: function(evt) {
},
/**
* Method: move
* This method is called during the handling of the mouse move event.
@@ -192,37 +305,27 @@ OpenLayers.Handler.Drag = OpenLayers.Class(OpenLayers.Handler, {
* Handle mousedown events
*
* Parameters:
* evt - {Event}
* evt - {Event}
*
* Returns:
* {Boolean} Let the event propagate.
*/
mousedown: function (evt) {
var propagate = true;
this.dragging = false;
if (this.checkModifiers(evt) && OpenLayers.Event.isLeftClick(evt)) {
this.started = true;
this.start = evt.xy;
this.last = evt.xy;
OpenLayers.Element.addClass(
this.map.viewPortDiv, "olDragDown"
);
this.down(evt);
this.callback("down", [evt.xy]);
OpenLayers.Event.stop(evt);
if(!this.oldOnselectstart) {
this.oldOnselectstart = (document.onselectstart) ? document.onselectstart : OpenLayers.Function.True;
}
document.onselectstart = OpenLayers.Function.False;
propagate = !this.stopDown;
} else {
this.started = false;
this.start = null;
this.last = null;
}
return propagate;
mousedown: function(evt) {
return this.dragstart(evt);
},
/**
* Method: touchstart
* Handle touchstart events
*
* Parameters:
* evt - {Event}
*
* Returns:
* {Boolean} Let the event propagate.
*/
touchstart: function(evt) {
return this.dragstart(evt);
},
/**
@@ -230,38 +333,29 @@ OpenLayers.Handler.Drag = OpenLayers.Class(OpenLayers.Handler, {
* Handle mousemove events
*
* Parameters:
* evt - {Event}
* evt - {Event}
*
* Returns:
* {Boolean} Let the event propagate.
*/
mousemove: function (evt) {
if (this.started && !this.timeoutId && (evt.xy.x != this.last.x || evt.xy.y != this.last.y)) {
if(this.documentDrag === true && this.documentEvents) {
if(evt.element === document) {
this.adjustXY(evt);
// do setEvent manually because the documentEvents are not
// registered with the map
this.setEvent(evt);
} else {
this.removeDocumentEvents();
}
}
if (this.interval > 0) {
this.timeoutId = setTimeout(OpenLayers.Function.bind(this.removeTimeout, this), this.interval);
}
this.dragging = true;
this.move(evt);
this.callback("move", [evt.xy]);
if(!this.oldOnselectstart) {
this.oldOnselectstart = document.onselectstart;
document.onselectstart = OpenLayers.Function.False;
}
this.last = this.evt.xy;
}
return true;
mousemove: function(evt) {
return this.dragmove(evt);
},
/**
* Method: touchmove
* Handle touchmove events
*
* Parameters:
* evt - {Event}
*
* Returns:
* {Boolean} Let the event propagate.
*/
touchmove: function(evt) {
return this.dragmove(evt);
},
/**
* Method: removeTimeout
* Private. Called by mousemove() to remove the drag timeout.
@@ -275,31 +369,30 @@ OpenLayers.Handler.Drag = OpenLayers.Class(OpenLayers.Handler, {
* Handle mouseup events
*
* Parameters:
* evt - {Event}
* evt - {Event}
*
* Returns:
* {Boolean} Let the event propagate.
*/
mouseup: function (evt) {
if (this.started) {
if(this.documentDrag === true && this.documentEvents) {
this.adjustXY(evt);
this.removeDocumentEvents();
}
var dragged = (this.start != this.last);
this.started = false;
this.dragging = false;
OpenLayers.Element.removeClass(
this.map.viewPortDiv, "olDragDown"
);
this.up(evt);
this.callback("up", [evt.xy]);
if(dragged) {
this.callback("done", [evt.xy]);
}
document.onselectstart = this.oldOnselectstart;
}
return true;
mouseup: function(evt) {
return this.dragend(evt);
},
/**
* Method: touchend
* Handle touchend events
*
* Parameters:
* evt - {Event}
*
* Returns:
* {Boolean} Let the event propagate.
*/
touchend: function(evt) {
// override evt.xy with last position since touchend does not have
// any touch position
evt.xy = this.last;
return this.dragend(evt);
},
/**
@@ -307,7 +400,7 @@ OpenLayers.Handler.Drag = OpenLayers.Class(OpenLayers.Handler, {
* Handle mouseout events
*
* Parameters:
* evt - {Event}
* evt - {Event}
*
* Returns:
* {Boolean} Let the event propagate.