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Implement Drag-to-Zoom for ticket #30.

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git-svn-id: http://svn.openlayers.org/trunk/openlayers@216 dc9f47b5-9b13-0410-9fdd-eb0c1a62fdaf
This commit is contained in:
crschmidt
2006-05-20 22:18:44 +00:00
parent e7c6d4df19
commit 24eb8fe144
2 changed files with 52 additions and 12 deletions
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60
lib/OpenLayers/Control/MouseDefaults.js
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@@ -11,7 +11,7 @@ OpenLayers.Control.MouseDefaults.prototype =
this.map.events.register( "mousedown", this.map, this.defaultMouseDown );
this.map.events.register( "mouseup", this.map, this.defaultMouseUp );
this.map.events.register( "mousemove", this.map, this.defaultMouseMove );
this.map.events.register( "mouseout", this.map, this.defaultMouseUp );
//this.map.events.register( "mouseout", this.map, this.defaultMouseUp );
},
/**
@@ -27,7 +27,18 @@ OpenLayers.Control.MouseDefaults.prototype =
*/
defaultMouseDown: function (evt) {
this.mouseDragStart = evt.xy.copyOf();
this.div.style.cursor = "move";
if (evt.shiftKey) {
this.div.style.cursor = "crosshair";
this.zoomBox = OpenLayers.Util.createDiv('zoomBox');
this.zoomBox.style.border = '1px solid red';
this.zoomBox.style.position="absolute";
this.zoomBox.style.zIndex=1000;
this.zoomBox.style.top=this.mouseDragStart.y;
this.zoomBox.style.left=this.mouseDragStart.x;
this.viewPortDiv.appendChild(this.zoomBox);
} else {
this.div.style.cursor = "move";
}
Event.stop(evt);
},
@@ -36,14 +47,27 @@ OpenLayers.Control.MouseDefaults.prototype =
*/
defaultMouseMove: function (evt) {
if (this.mouseDragStart != null) {
var deltaX = this.mouseDragStart.x - evt.xy.x;
var deltaY = this.mouseDragStart.y - evt.xy.y
var size = this.getSize();
var newXY = new OpenLayers.Pixel(size.w / 2 + deltaX,
size.h / 2 + deltaY);
var newCenter = this.getLonLatFromPixel( newXY );
this.setCenter(newCenter);
this.mouseDragStart = evt.xy.copyOf();
if (this.zoomBox) {
var deltaX = Math.abs(this.mouseDragStart.x - evt.xy.x);
var deltaY = Math.abs(this.mouseDragStart.y - evt.xy.y);
this.zoomBox.style.width = deltaX+"px";
this.zoomBox.style.height = deltaY+"px";
if (evt.xy.x < this.mouseDragStart.x) {
this.zoomBox.style.left = evt.xy.x+"px";
}
if (evt.xy.y < this.mouseDragStart.y) {
this.zoomBox.style.top = evt.xy.y+"px";
}
} else {
var deltaX = this.mouseDragStart.x - evt.xy.x;
var deltaY = this.mouseDragStart.y - evt.xy.y;
var size = this.getSize();
var newXY = new OpenLayers.Pixel(size.w / 2 + deltaX,
size.h / 2 + deltaY);
var newCenter = this.getLonLatFromPixel( newXY );
this.setCenter(newCenter);
this.mouseDragStart = evt.xy.copyOf();
}
}
},
@@ -51,6 +75,22 @@ OpenLayers.Control.MouseDefaults.prototype =
* @param {Event} evt
*/
defaultMouseUp: function (evt) {
if (this.zoomBox) {
var start = this.getLonLatFromPixel( this.mouseDragStart );
var end = this.getLonLatFromPixel( evt.xy );
var top = (start.lat > end.lat ? start.lat : end.lat);
var bottom = (start.lat < end.lat ? start.lat : end.lat);
var left = (start.lon < end.lon ? start.lon : end.lon);
var right = (start.lon > end.lon ? start.lon : end.lon);
var bounds = new OpenLayers.Bounds(left, bottom, right, top);
var zoom = this.getZoomForExtent(bounds);
this.setCenter(new OpenLayers.LonLat(
(start.lon + end.lon) / 2,
(start.lat + end.lat) / 2
), zoom);
this.viewPortDiv.removeChild(document.getElementById("zoomBox"));
this.zoomBox = null;
}
this.mouseDragStart = null;
this.div.style.cursor = "default";
}