Floor the application scale to avoid too small image and negative value

(causing image flip). Fixes #134.
ivmartel · Apr 28, 2015 · ed21dd6 · ed21dd6
1 parent f895118
commit ed21dd6
Showing 1 changed file with 6 additions and 0 deletions.
diff --git a/src/app/application.js b/src/app/application.js
@@ -731,6 +731,9 @@ dwv.App = function ()
      */ 
     this.zoom = function (zoom, cx, cy) {
         scale = zoom * windowScale;
+        if ( scale <= 0.1 ) {
+            scale = 0.1;
+        }
         scaleCenter = {"x": cx, "y": cy};
         zoomLayers();
     };
@@ -744,6 +747,9 @@ dwv.App = function ()
      */ 
     this.stepZoom = function (step, cx, cy) {
         scale += step;
+        if ( scale <= 0.1 ) {
+            scale = 0.1;
+        }
         scaleCenter = {"x": cx, "y": cy};
         zoomLayers();
     };