[project view] track pane selection from content manager

platform/lang-impl/src/com/intellij/ide/projectView/impl/ProjectViewImpl.java

@@ -106,6 +106,8 @@ import java.awt.*;
 import java.util.*;
 import java.util.List;
 
+import static com.intellij.ide.projectView.impl.StatisticsKt.triggerProjectViewPane;
+
 @State(name = "ProjectView", storages = @Storage(StoragePathMacros.WORKSPACE_FILE))
 public class ProjectViewImpl extends ProjectView implements PersistentStateComponent<Element>, Disposable, QuickActionProvider, BusyObject  {
   private static final Logger LOG = Logger.getInstance("#com.intellij.ide.projectView.impl.ProjectViewImpl");
@@ -546,7 +548,7 @@ public class ProjectViewImpl extends ProjectView implements PersistentStateCompo
       @Override
       public void selectionChanged(ContentManagerEvent event) {
         if (event.getOperation() == ContentManagerEvent.ContentOperation.add) {
-          viewSelectionChanged();
+          viewSelectionChanged(true);
         }
       }
     });
@@ -575,6 +577,10 @@ public class ProjectViewImpl extends ProjectView implements PersistentStateCompo
   }
 
   private boolean viewSelectionChanged() {
+    return viewSelectionChanged(false);
+  }
+
+  private boolean viewSelectionChanged(boolean fromContentManager) {
     Content content = getContentManager().getSelectedContent();
     if (content == null) return false;
     final String id = content.getUserData(ID_KEY);
@@ -584,6 +590,9 @@ public class ProjectViewImpl extends ProjectView implements PersistentStateCompo
     if (newPane == null) return false;
     newPane.setSubId(subId);
     showPane(newPane);
+    if (fromContentManager) {
+      triggerProjectViewPane(myCurrentViewId, myCurrentViewSubId);
+    }
     ProjectViewSelectInTarget target = getProjectViewSelectInTarget(newPane);
     if (target != null) target.setSubId(subId);
     if (isAutoscrollFromSource(id)) {

platform/lang-impl/src/com/intellij/ide/projectView/impl/statistics.kt

@@ -0,0 +1,28 @@
+/*
+ * Copyright 2000-2017 JetBrains s.r.o.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.intellij.ide.projectView.impl
+
+import com.intellij.internal.statistic.UsageTrigger
+import com.intellij.internal.statistic.beans.ConvertUsagesUtil.ensureProperKey
+
+private val prefix = "project.view.pane"
+
+internal fun triggerProjectViewPane(id: String?, subId: String?) {
+  if (id == null) return
+  val featureString = if (subId == null) "$prefix.$id" else "$prefix.$id.$subId"
+  val key = ensureProperKey(featureString)
+  UsageTrigger.trigger(key)
+}