Give each source file a unique name

src/ol/interaction/dragzoominteraction.js

@@ -0,0 +1,86 @@
+// FIXME draw drag box
+
+goog.provide('ol.interaction.DragZoom');
+
+goog.require('ol.Extent');
+goog.require('ol.MapBrowserEvent');
+goog.require('ol.control.DragBox');
+goog.require('ol.interaction.ConditionType');
+goog.require('ol.interaction.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.interaction.Drag}
+ * @param {ol.interaction.ConditionType} condition Condition.
+ */
+ol.interaction.DragZoom = function(condition) {
+
+  goog.base(this);
+
+  /**
+   * @private
+   * @type {ol.interaction.ConditionType}
+   */
+  this.condition_ = condition;
+
+  /**
+   * @type {ol.control.DragBox}
+   * @private
+   */
+  this.dragBox_ = null;
+
+
+};
+goog.inherits(ol.interaction.DragZoom, ol.interaction.Drag);
+
+
+/**
+ * @inheritDoc
+ */
+ol.interaction.DragZoom.prototype.handleDragEnd =
+    function(mapBrowserEvent) {
+  this.dragBox_.setMap(null);
+  this.dragBox_ = null;
+  if (this.deltaX * this.deltaX + this.deltaY * this.deltaY >=
+      ol.SHIFT_DRAG_ZOOM_HYSTERESIS_PIXELS_SQUARED) {
+    var map = mapBrowserEvent.map;
+    var extent = ol.Extent.boundingExtent(
+        this.startCoordinate,
+        mapBrowserEvent.getCoordinate());
+    map.fitExtent(extent);
+  }
+};
+
+
+/**
+ * @inheritDoc
+ */
+ol.interaction.DragZoom.prototype.handleDragStart =
+    function(mapBrowserEvent) {
+  var browserEvent = mapBrowserEvent.browserEvent;
+  if (browserEvent.isMouseActionButton() && this.condition_(browserEvent)) {
+    this.dragBox_ = new ol.control.DragBox({
+      map: mapBrowserEvent.map,
+      startCoordinate: this.startCoordinate
+    });
+    return true;
+  } else {
+    return false;
+  }
+};