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"Always zoom in/out while drawing the zoom box." Patch from jachym, tested

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and example added by vdeparday. r=me. (Closes #1771)


git-svn-id: http://svn.openlayers.org/trunk/openlayers@8977 dc9f47b5-9b13-0410-9fdd-eb0c1a62fdaf
This commit is contained in:
crschmidt
2009-03-10 03:50:01 +00:00
parent 1ed1584320
commit 676475d902
2 changed files with 89 additions and 0 deletions
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78
examples/navtoolbar-alwaysZoom.html Normal file
View File

@@ -0,0 +1,78 @@
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>A navToolbar with an alwaysZoom ZoomBox</title>
<link rel="stylesheet" href="../theme/default/style.css" type="text/css" />
<link rel="stylesheet" href="style.css" type="text/css" />
<!-- Override the position of the toolbar to make it fit in a small map -->
<style type='text/css'>
.olControlNavToolbar div {
top: 150px;
}
</style>
<script src="../lib/OpenLayers.js"></script>
<script type="text/javascript">
function init() {
//Creation of a custom panel with a ZoomBox control with the alwaysZoom option sets to true
OpenLayers.Control.CustomNavToolbar = OpenLayers.Class(OpenLayers.Control.Panel, {
/**
* Constructor: OpenLayers.Control.NavToolbar
* Add our two mousedefaults controls.
*
* Parameters:
* options - {Object} An optional object whose properties will be used
* to extend the control.
*/
initialize: function(options) {
OpenLayers.Control.Panel.prototype.initialize.apply(this, [options]);
this.addControls([
new OpenLayers.Control.Navigation(),
//Here it come
new OpenLayers.Control.ZoomBox({alwaysZoom:true})
]);
// To make the custom navtoolbar use the regular navtoolbar style
this.displayClass = 'olControlNavToolbar'
},
/**
* Method: draw
* calls the default draw, and then activates mouse defaults.
*/
draw: function() {
var div = OpenLayers.Control.Panel.prototype.draw.apply(this, arguments);
this.activateControl(this.controls[0]);
return div;
},
});
var map;
map = new OpenLayers.Map('map');
var wms = new OpenLayers.Layer.WMS(
"OpenLayers WMS",
"http://labs.metacarta.com/wms/vmap0",
{layers: 'basic'}
);
map.addLayers([wms]);
map.zoomToMaxExtent();
var panel = new OpenLayers.Control.CustomNavToolbar();
map.addControl(panel);
}
</script>
</head>
<body onload="init()">
<h1 id="title">A navToolbar with an alwaysZoom ZoomBox</h1>
<p id="shortdesc">
Demo of a custom NavToolbar which uses a zoomBox tool that always zoom in even when the zoom box is too big.
</p>
<div id="map" class="smallmap"> </div>
</body>
</html>

11
lib/OpenLayers/Control/ZoomBox.js
View File

@@ -29,6 +29,12 @@ OpenLayers.Control.ZoomBox = OpenLayers.Class(OpenLayers.Control, {
*/
out: false,
/**
* Property: alwaysZoom
* {Boolean} Always zoom in/out, when box drawed
*/
alwaysZoom: false,
/**
* Method: draw
*/
@@ -66,7 +72,12 @@ OpenLayers.Control.ZoomBox = OpenLayers.Class(OpenLayers.Control, {
var ymax = center.lat + (extent.getHeight()/2)*zoomFactor;
var bounds = new OpenLayers.Bounds(xmin, ymin, xmax, ymax);
}
// always zoom in/out
var lastZoom = this.map.getZoom();
this.map.zoomToExtent(bounds);
if (lastZoom == this.map.getZoom() && this.alwaysZoom == true){
this.map.zoomTo(lastZoom + (this.out ? -1 : 1));
}
} else { // it's a pixel
if (!this.out) {
this.map.setCenter(this.map.getLonLatFromPixel(position),