- This example creates a "zoom to extent" button.
+ This example creates a "rotate to north" button.
See the custom-controls.js
source to see how this is done.
- Per default, the zoom extent control use the map projection extent.
diff --git a/examples/custom-controls.js b/examples/custom-controls.js
index 9ddadcc92d..d5d774fbc7 100644
--- a/examples/custom-controls.js
+++ b/examples/custom-controls.js
@@ -16,7 +16,7 @@ var app = window.app;
//
-// Define zoom extent control.
+// Define rotate to north control.
//
@@ -26,25 +26,26 @@ var app = window.app;
* @extends {ol.control.Control}
* @param {Object=} opt_options Control options.
*/
-app.ZoomExtentControl = function(opt_options) {
+app.RotateNorthControl = function(opt_options) {
var options = opt_options || {};
- this.extent_ = options.extent;
var anchor = document.createElement('a');
- anchor.href = '#zoom-to';
- anchor.className = 'zoom-to';
+ anchor.href = '#rotate-north';
+ anchor.innerHTML = 'N';
var this_ = this;
- var handleZoomTo = function(e) {
- this_.handleZoomTo(e);
+ var handleRotateNorth = function(e) {
+ // prevent #rotate-north anchor from getting appended to the url
+ e.preventDefault();
+ this_.getMap().getView().getView2D().setRotation(0);
};
- anchor.addEventListener('click', handleZoomTo, false);
- anchor.addEventListener('touchstart', handleZoomTo, false);
+ anchor.addEventListener('click', handleRotateNorth, false);
+ anchor.addEventListener('touchstart', handleRotateNorth, false);
var element = document.createElement('div');
- element.className = 'zoom-extent ol-unselectable';
+ element.className = 'rotate-north ol-unselectable';
element.appendChild(anchor);
ol.control.Control.call(this, {
@@ -54,46 +55,17 @@ app.ZoomExtentControl = function(opt_options) {
});
};
-ol.inherits(app.ZoomExtentControl, ol.control.Control);
-
-
-/**
- * @param {Event} e Browser event.
- */
-app.ZoomExtentControl.prototype.handleZoomTo = function(e) {
- // prevent #zoomTo anchor from getting appended to the url
- e.preventDefault();
-
- var map = this.getMap();
- var view = map.getView();
- view.fitExtent(this.extent_, map.getSize());
-};
-
-
-/**
- * Overload setMap to use the view projection's validity extent
- * if no extent was passed to the constructor.
- * @param {ol.Map} map Map.
- */
-app.ZoomExtentControl.prototype.setMap = function(map) {
- ol.control.Control.prototype.setMap.call(this, map);
- if (map && !this.extent_) {
- this.extent_ = map.getView().getProjection().getExtent();
- }
-};
+ol.inherits(app.RotateNorthControl, ol.control.Control);
//
-// Create map, giving it a zoom extent control.
+// Create map, giving it a rotate to north control.
//
var map = new ol.Map({
controls: ol.control.defaults({}, [
- new app.ZoomExtentControl({
- extent: [813079.7791264898, 848966.9639063801,
- 5929220.284081122, 5936863.986909639]
- })
+ new app.RotateNorthControl()
]),
layers: [
new ol.layer.TileLayer({
@@ -104,6 +76,7 @@ var map = new ol.Map({
target: 'map',
view: new ol.View2D({
center: [0, 0],
- zoom: 2
+ zoom: 2,
+ rotation: 1
})
});