Merge branch 'master' of https://github.com/openseadragon/openseadragon

changelog.txt

@@ -1,7 +1,9 @@
 OPENSEADRAGON CHANGELOG
 =======================
 
-2.4.0: (In Progress)
+2.4.1: (In progress)
+
+2.4.0:
 
 * BREAKING CHANGE: Viewer's canvas-double-click event is now fired before it initiates the zoom (#1288)
 * You can now flip the viewport to get a mirror image of the original (#1441)
@@ -16,6 +18,10 @@ OPENSEADRAGON CHANGELOG
 * Fixed an issue causing the simple image tileSource to sometimes show duplicate copies (#1370)
 * Fixed an issue causing seams to appear in semi-transparent PNG tiled images (#1470)
 * Added visual customization options for the navigator (#1480)
+* You can now prevent canvas-drag events on the navigator (#1484)
+* You can now prevent canvas-click events on the navigator (#1416)
+* The navigator can now be restricted to just horizontal or just vertical panning (#1416)
+* Fixed DziTileSource so it doesn't load levels above maxLevel or below minLevel, if set (#1492)
  
 2.3.1:
 

package.json

@@ -1,6 +1,6 @@
 {
   "name": "openseadragon",
-  "version": "2.3.1",
+  "version": "2.4.0",
   "description": "Provides a smooth, zoomable user interface for HTML/Javascript.",
   "keywords": [
     "image",

src/dzitilesource.js

@@ -182,6 +182,10 @@ $.extend( $.DziTileSource.prototype, $.TileSource.prototype, /** @lends OpenSead
             yMax,
             i;
 
+        if ((this.minLevel && level < this.minLevel) || (this.maxLevel && level > this.maxLevel)) {
+            return false;
+        }
+
         if ( !rects || !rects.length ) {
             return true;
         }

src/navigator.js

@@ -428,13 +428,48 @@ $.extend( $.Navigator.prototype, $.EventSource.prototype, $.Viewer.prototype, /*
  * @function
  */
 function onCanvasClick( event ) {
-    if ( event.quick && this.viewer.viewport ) {
-        if(this.viewer.viewport.flipped){
-          event.position.x = this.viewport.getContainerSize().x - event.position.x;
-        }
-        this.viewer.viewport.panTo(this.viewport.pointFromPixel(event.position));
-        this.viewer.viewport.applyConstraints();
+  var canvasClickEventArgs = {
+    tracker: event.eventSource,
+    position: event.position,
+    quick: event.quick,
+    shift: event.shift,
+    originalEvent: event.originalEvent,
+    preventDefaultAction: event.preventDefaultAction
+  };
+  /**
+   * Raised when a click event occurs on the {@link OpenSeadragon.Viewer#navigator} element.
+   *
+   * @event navigator-click
+   * @memberof OpenSeadragon.Viewer
+   * @type {object}
+   * @property {OpenSeadragon.Viewer} eventSource - A reference to the Viewer which raised this event.
+   * @property {OpenSeadragon.MouseTracker} tracker - A reference to the MouseTracker which originated this event.
+   * @property {OpenSeadragon.Point} position - The position of the event relative to the tracked element.
+   * @property {Boolean} quick - True only if the clickDistThreshold and clickTimeThreshold are both passed. Useful for differentiating between clicks and drags.
+   * @property {Boolean} shift - True if the shift key was pressed during this event.
+   * @property {Object} originalEvent - The original DOM event.
+   * @property {?Object} userData - Arbitrary subscriber-defined object.
+   * @property {Boolean} preventDefaultAction - Set to true to prevent default click to zoom behaviour. Default: false.
+   */
+
+   this.viewer.raiseEvent('navigator-click', canvasClickEventArgs);
+
+   if ( !canvasClickEventArgs.preventDefaultAction && event.quick && this.viewer.viewport && (this.panVertical || this.panHorizontal)) {
+    if(this.viewer.viewport.flipped) {
+      event.position.x = this.viewport.getContainerSize().x - event.position.x;
     }
+    var target = this.viewport.pointFromPixel(event.position);
+    if (!this.panVertical) {
+      // perform only horizonal pan
+      target.y = this.viewer.viewport.getCenter(true).y;
+    } else if (!this.panHorizontal) {
+      // perform only vertical pan
+      target.x = this.viewer.viewport.getCenter(true).x;
+    }
+    this.viewer.viewport.panTo(target);
+    this.viewer.viewport.applyConstraints();
+  }
+
 }
 
 /**
@@ -443,8 +478,37 @@ function onCanvasClick( event ) {
  * @function
  */
 function onCanvasDrag( event ) {
-    if ( this.viewer.viewport ) {
-        if( !this.panHorizontal ){
+    var canvasDragEventArgs = {
+      tracker: event.eventSource,
+      position: event.position,
+      delta: event.delta,
+      speed: event.speed,
+      direction: event.direction,
+      shift: event.shift,
+      originalEvent: event.originalEvent,
+      preventDefaultAction: event.preventDefaultAction
+    };
+    /**
+     * Raised when a drag event occurs on the {@link OpenSeadragon.Viewer#navigator} element.
+     *
+     * @event navigator-drag
+     * @memberof OpenSeadragon.Viewer
+     * @type {object}
+     * @property {OpenSeadragon.Viewer} eventSource - A reference to the Viewer which raised this event.
+     * @property {OpenSeadragon.MouseTracker} tracker - A reference to the MouseTracker which originated this event.
+     * @property {OpenSeadragon.Point} position - The position of the event relative to the tracked element.
+     * @property {OpenSeadragon.Point} delta - The x,y components of the difference between start drag and end drag.
+     * @property {Number} speed - Current computed speed, in pixels per second.
+     * @property {Number} direction - Current computed direction, expressed as an angle counterclockwise relative to the positive X axis (-pi to pi, in radians). Only valid if speed > 0.
+     * @property {Boolean} shift - True if the shift key was pressed during this event.
+     * @property {Object} originalEvent - The original DOM event.
+     * @property {?Object} userData - Arbitrary subscriber-defined object.
+     * @property {Boolean} preventDefaultAction - Set to true to prevent default click to zoom behaviour. Default: false.
+     */
+     this.viewer.raiseEvent('navigator-drag', canvasDragEventArgs);
+
+     if ( !canvasDragEventArgs.preventDefaultAction && this.viewer.viewport ) {
+       if( !this.panHorizontal ){
             event.delta.x = 0;
         }
         if( !this.panVertical ){

src/tiledimage.js

@@ -972,6 +972,7 @@ $.extend($.TiledImage.prototype, $.EventSource.prototype, /** @lends OpenSeadrag
 
         // Calculations for the interval of levels to draw
         // can return invalid intervals; fix that here if necessary
+        highestLevel = Math.max(highestLevel, this.source.minLevel || 0);
         lowestLevel = Math.min(lowestLevel, highestLevel);
         return {
             lowestLevel: lowestLevel,