add possibility to add wearable from external url

interface/resources/qml/hifi/AvatarApp.qml

@@ -285,6 +285,9 @@ Rectangle {
         onWearableSelected: {
             emitSendToScript({'method' : 'selectWearable', 'entityID' : id});
         }
+        onAddWearable: {
+            emitSendToScript({'method' : 'addWearable', 'avatarName' : avatarName, 'url' : url});
+        }
 
         z: 3
     }

interface/resources/qml/hifi/avatarapp/AdjustWearables.qml

@@ -18,6 +18,7 @@ Rectangle {
 
     signal adjustWearablesOpened(var avatarName);
     signal adjustWearablesClosed(bool status, var avatarName);
+    signal addWearable(string avatarName, string url);
 
     property bool modified: false;
     Component.onCompleted: {
@@ -40,6 +41,8 @@ Rectangle {
 
     function refresh(avatar) {
         wearablesCombobox.model.clear();
+        wearablesCombobox.currentIndex = -1;
+
         for(var i = 0; i < avatar.wearables.count; ++i) {
             var wearable = avatar.wearables.get(i).properties;
             for(var j = (wearable.modelURL.length - 1); j >= 0; --j) {
@@ -167,6 +170,12 @@ Rectangle {
                         linkColor: hifi.colors.blueHighlight
                         anchors.verticalCenter: parent.verticalCenter
                         anchors.right: parent.right
+                        onLinkActivated: {
+                            popup.showSpecifyWearableUrl(function(url) {
+                                console.debug('popup.showSpecifyWearableUrl: ', url);
+                                addWearable(root.avatarName, url);
+                            });
+                        }
                     }
                 }
             }

interface/resources/qml/hifi/avatarapp/MessageBoxes.qml

@@ -33,6 +33,26 @@ MessageBox {
         popup.inputText.forceActiveFocus();
     }
 
+    function showSpecifyWearableUrl(callback) {
+        popup.button2text = 'CONFIRM'
+        popup.button1text = 'CANCEL'
+        popup.titleText = 'Specify Wearable URL'
+        popup.bodyText = 'If you want to add a custom wearable, you can specify the URL of the wearable file here.'
+
+        popup.inputText.visible = true;
+        popup.inputText.placeholderText = 'Enter Wearable URL';
+
+        popup.onButton2Clicked = function() {
+            if(callback)
+                callback(popup.inputText.text);
+
+            popup.close();
+        }
+
+        popup.open();
+        popup.inputText.forceActiveFocus();
+    }
+
     property url getWearablesUrl: '../../../images/avatarapp/AvatarIsland.jpg'
 
     function showGetWearables(callback, linkCallback) {

scripts/system/avatarapp.js

@@ -235,6 +235,33 @@ function fromQml(message) { // messages are {method, params}, like json-rpc. See
         Messages.messageReceived.disconnect(handleWearableMessages);
         Messages.unsubscribe('Hifi-Object-Manipulation');
         break;
+    case 'addWearable':
+
+        var joints = MyAvatar.getJointNames();
+        var hipsIndex = -1;
+
+        for(var i = 0; i < joints.length; ++i) {
+            if(joints[i] === 'Hips') {
+                hipsIndex = i;
+                break;
+            }
+        }
+
+        var properties = {
+            name: "Custom wearable",
+            type: "Model",
+            modelURL: message.url,
+            parentID: MyAvatar.sessionUUID,
+            relayParentJoints: false,
+            parentJointIndex: hipsIndex
+        };
+
+        var entityID = Entities.addEntity(properties, true);
+        updateAvatarWearables(currentAvatar, message.avatarName);
+        executeLater(function() {
+            onSelectedEntity(entityID);
+        });
+        break;
     case 'selectWearable':
         ensureWearableSelected(message.entityID);
         break;