Rename ol.control.DragZoom to ol.control.ShiftDragZoom

2012-07-29 17:17:49 +02:00
parent 8179cf0b69
commit 2f32158374
2 changed files with 16 additions and 9 deletions
@@ -0,0 +1,59 @@
+// FIXME draw drag box
+
+goog.provide('ol.control.ShiftDragZoom');
+
+goog.require('ol.Extent');
+goog.require('ol.MapBrowserEvent');
+goog.require('ol.control.Drag');
+
+
+/**
+ * @define {number} Hysterisis pixels.
+ */
+ol.SHIFT_DRAG_ZOOM_HYSTERESIS_PIXELS = 8;
+
+
+/**
+ * @const {number}
+ */
+ol.SHIFT_DRAG_ZOOM_HYSTERESIS_PIXELS_SQUARED =
+    ol.SHIFT_DRAG_ZOOM_HYSTERESIS_PIXELS * ol.SHIFT_DRAG_ZOOM_HYSTERESIS_PIXELS;
+
+
+
+/**
+ * @constructor
+ * @extends {ol.control.Drag}
+ */
+ol.control.ShiftDragZoom = function() {
+  goog.base(this);
+};
+goog.inherits(ol.control.ShiftDragZoom, ol.control.Drag);
+
+
+/**
+ * @inheritDoc
+ */
+ol.control.ShiftDragZoom.prototype.handleDragEnd = function(mapBrowserEvent) {
+  if (this.deltaX * this.deltaX + this.deltaY * this.deltaY >=
+      ol.SHIFT_DRAG_ZOOM_HYSTERESIS_PIXELS_SQUARED) {
+    var extent = ol.Extent.boundingExtent(
+        this.startCoordinate,
+        mapBrowserEvent.getCoordinate());
+    mapBrowserEvent.map.fitExtent(extent);
+  }
+};
+
+
+/**
+ * @inheritDoc
+ */
+ol.control.ShiftDragZoom.prototype.handleDragStart = function(mapBrowserEvent) {
+  var browserEvent = mapBrowserEvent.browserEvent;
+  if (browserEvent.shiftKey) {
+    browserEvent.preventDefault();
+    return true;
+  } else {
+    return false;
+  }
+};