ashatora/openlayers
1
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

Smooth GDragging at last. Thanks to overstdr for digging up the getDragObject method. With v2.93 and later we no longer get flickers on panning. Non-API smooth dragging is no longer supported. r=crschmidt,me (closes #1402)

Browse Source 
git-svn-id: http://svn.openlayers.org/trunk/openlayers@6492 dc9f47b5-9b13-0410-9fdd-eb0c1a62fdaf
This commit is contained in:
Tim Schaub
2008-03-11 18:32:17 +00:00
parent 008c820e2b
commit d12fd7c04c
6 changed files with 47 additions and 45 deletions
Download Patch File Download Diff File Expand all files Collapse all files

19
lib/OpenLayers/Layer/EventPane.js
View File

@@ -241,10 +241,9 @@ OpenLayers.Layer.EventPane = OpenLayers.Class(OpenLayers.Layer, {
if (dragging && this.dragPanMapObject &&
this.smoothDragPan) {
var resolution = this.map.getResolution();
var dX = (newCenter.lon - oldCenter.lon) / resolution;
var dY = (newCenter.lat - oldCenter.lat) / resolution;
this.dragPanMapObject(dX, dY);
var oldPx = this.map.getViewPortPxFromLonLat(oldCenter);
var newPx = this.map.getViewPortPxFromLonLat(newCenter);
this.dragPanMapObject(newPx.x-oldPx.x, oldPx.y-newPx.y);
} else {
var center = this.getMapObjectLonLatFromOLLonLat(newCenter);
var zoom = this.getMapObjectZoomFromOLZoom(newZoom);
@@ -281,18 +280,6 @@ OpenLayers.Layer.EventPane = OpenLayers.Class(OpenLayers.Layer, {
var moPixel = this.getMapObjectPixelFromOLPixel(viewPortPx);
var moLonLat = this.getMapObjectLonLatFromMapObjectPixel(moPixel);
lonlat = this.getOLLonLatFromMapObjectLonLat(moLonLat);
var xrem = this.map.size.w % 2;
var yrem = this.map.size.h % 2;
if(xrem != 0 || yrem != 0) {
// odd sized viewport
var olPx = viewPortPx.add(xrem, yrem);
var moPx = this.getMapObjectPixelFromOLPixel(olPx);
var moLoc = this.getMapObjectLonLatFromMapObjectPixel(moPx);
var olLoc = this.getOLLonLatFromMapObjectLonLat(moLoc);
// adjust by half a pixel in odd dimension(s)
lonlat.lon += (olLoc.lon - lonlat.lon) / 2;
lonlat.lat += (olLoc.lat - lonlat.lat) / 2;
}
}
return lonlat;
},

30
lib/OpenLayers/Layer/Google.js
View File

@@ -75,6 +75,13 @@ OpenLayers.Layer.Google = OpenLayers.Class(
* other maps, etc.
*/
sphericalMercator: false,
/**
* Property: dragObject
* {GDraggableObject} Since 2.93, Google has exposed the ability to get
* the maps GDraggableObject. We can now use this for smooth panning
*/
dragObject: null,
/**
* Constructor: OpenLayers.Layer.Google
@@ -106,6 +113,14 @@ OpenLayers.Layer.Google = OpenLayers.Class(
try {
// create GMap, hide nav controls
this.mapObject = new GMap2( this.div );
//since v 2.93 getDragObject is now available.
if(typeof this.mapObject.getDragObject == "function") {
this.dragObject = this.mapObject.getDragObject();
} else {
this.dragPanMapObject = null;
}
// move the ToS and branding stuff up to the pane
// thanks a *mil* Erik for thinking of this
@@ -123,15 +138,8 @@ OpenLayers.Layer.Google = OpenLayers.Class(
termsOfUse.style.right = "";
termsOfUse.style.bottom = "";
//can we do smooth panning? (some versions don't)
if ( !this.mapObject.G || !this.mapObject.G.qb ||
(typeof this.mapObject.G.qb != "function") ) {
this.dragPanMapObject = null;
}
} catch (e) {
// do not crash
OpenLayers.Console.error(e);
}
},
@@ -343,11 +351,9 @@ OpenLayers.Layer.Google = OpenLayers.Class(
* dY - {Integer}
*/
dragPanMapObject: function(dX, dY) {
var newX = this.mapObject.G.left - dX;
var newY = this.mapObject.G.top + dY;
this.mapObject.G.qb(newX, newY);
this.dragObject.moveBy(new GSize(-dX, dY));
},
/**
* APIMethod: getMapObjectCenter
*