Added hotkey support to viewerbase

Packages/viewerbase/client/components/viewer/loadingIndicator/loadingIndicator.js

@@ -0,0 +1,70 @@
+Meteor.startup(function() {
+    cornerstoneTools.loadHandlerManager.setStartLoadHandler(startLoadingHandler);
+    cornerstoneTools.loadHandlerManager.setEndLoadHandler(doneLoadingHandler);
+    cornerstoneTools.loadHandlerManager.setErrorLoadingHandler(errorLoadingHandler);
+});
+
+var loadHandlerTimeout;
+
+startLoadingHandler = function(element) {
+    clearTimeout(loadHandlerTimeout);
+    loadHandlerTimeout = setTimeout(function() {
+        var elem = $(element);
+        elem.siblings('.imageViewerErrorLoadingIndicator').css('display', 'none');
+        elem.find('canvas').not('.magnifyTool').addClass("faded");
+        elem.siblings('.imageViewerLoadingIndicator').css('display', 'block');
+    }, OHIF.viewer.loadIndicatorDelay);
+};
+
+doneLoadingHandler = function(element) {
+    clearTimeout(loadHandlerTimeout);
+    var elem = $(element);
+    elem.siblings('.imageViewerErrorLoadingIndicator').css('display', 'none');
+    elem.find('canvas').not('.magnifyTool').removeClass("faded");
+    elem.siblings('.imageViewerLoadingIndicator').css('display', 'none');
+};
+
+errorLoadingHandler = function(element, imageId, error, source) {
+    clearTimeout(loadHandlerTimeout);
+    var elem = $(element);
+
+    // Could probably chain all of these, but this is more readable
+    elem.find('canvas').not('.magnifyTool').removeClass("faded");
+    elem.siblings('.imageViewerLoadingIndicator').css('display', 'none');
+
+    // Don't display errors from the stackPrefetch tool
+    if (source === "stackPrefetch") {
+        return;
+    }
+
+    var errorLoadingIndicator = elem.siblings('.imageViewerErrorLoadingIndicator');
+    errorLoadingIndicator.css('display', 'block');
+
+    var cleanedImageId = imageId;
+
+    // This is just used to expand upon some error messages that are sent
+    // when things fail. An example is a network error throwing the error
+    // which is only described as "network".
+    var errorDetails = {
+        network: "A network error has occurred"
+        // We need to expand this further when we see more obscure error messages
+    };
+
+    if (errorDetails.hasOwnProperty(error)) {
+        error = errorDetails[error];
+    }
+
+    errorLoadingIndicator.find('.description').text("An error has occurred while loading image: " + cleanedImageId);
+    if (error) {
+        errorLoadingIndicator.find('.details').text("Details: " + error);
+    }
+};
+
+Template.loadingIndicator.helpers({
+    'percentComplete': function(e) {
+        var percentComplete = Session.get('CornerstoneLoadProgress' + this.viewportIndex);
+        if (percentComplete && percentComplete !== 100) {
+            return percentComplete + '%';
+        }
+    }
+});