[DevTools] Start/stop of timeline recording should set UI controls disabled/enabled respectively.

Source/devtools/front_end/timeline/TimelinePanel.js

 /*
  * Copyright (C) 2012 Google Inc. All rights reserved.
  * Copyright (C) 2012 Intel Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
@@ skipping 312 matching lines @@
         }
         this._currentViews = [];
         this._stackView.detachChildViews();
     },
 
     _createRecordingOptions: function()
     {
         var topPaneSidebarElement = this._topPane.sidebarElement();
 
         this._captureStacksSetting = WebInspector.settings.createSetting("timelineCaptureStacks", true);
+        this._captureStacksCheckbox = document.createElement("input");

[aandrey, 2014/07/03 08:00:49]

I'd create an array this._uiControlsCheckboxes, push all input elements into it
and later iterate over the array to disable/enable all elements.

         topPaneSidebarElement.appendChild(WebInspector.SettingsUI.createSettingCheckbox(WebInspector.UIString("Capture stacks"),
-                                          this._captureStacksSetting, true, undefined,
+                                          this._captureStacksSetting, true, this._captureStacksCheckbox,
                                           WebInspector.UIString("Capture JavaScript stack on every timeline event")));
 
         this._captureMemorySetting = WebInspector.settings.createSetting("timelineCaptureMemory", false);
+        this._captureMemoryCheckbox = document.createElement("input");
         topPaneSidebarElement.appendChild(WebInspector.SettingsUI.createSettingCheckbox(WebInspector.UIString("Capture memory"),
-                                          this._captureMemorySetting, true, undefined,
+                                          this._captureMemorySetting, true, this._captureMemoryCheckbox,
                                           WebInspector.UIString("Capture memory information on every timeline event")));
         this._captureMemorySetting.addChangeListener(this._onModeChanged, this);
 
         if (Capabilities.canProfilePower) {
             this._capturePowerSetting = WebInspector.settings.createSetting("timelineCapturePower", false);
+            this._capturePowerCheckbox = document.createElement("input");
             topPaneSidebarElement.appendChild(WebInspector.SettingsUI.createSettingCheckbox(WebInspector.UIString("Capture power"),
-                                              this._capturePowerSetting, true, undefined,
+                                              this._capturePowerSetting, true, this._capturePowerCheckbox,
                                               WebInspector.UIString("Capture power information")));
             this._capturePowerSetting.addChangeListener(this._onModeChanged, this);
         }
 
         if (WebInspector.experimentsSettings.timelineTracingMode.isEnabled()) {
             this._captureTracingSetting = WebInspector.settings.createSetting("timelineCaptureTracing", false);
+            this._captureTracingCheckbox = document.createElement("input");
             topPaneSidebarElement.appendChild(WebInspector.SettingsUI.createSettingCheckbox(WebInspector.UIString("Capture tracing"),
-                                              this._captureTracingSetting, true, undefined,
+                                              this._captureTracingSetting, true, this._captureTracingCheckbox,
                                               WebInspector.UIString("Capture tracing information")));
             this._captureTracingSetting.addChangeListener(this._onModeChanged, this);
         } else if (WebInspector.experimentsSettings.timelineOnTraceEvents.isEnabled()) {
             this._captureLayersAndPicturesSetting = WebInspector.settings.createSetting("timelineCaptureLayersAndPictures", false);
+            this._captureLayersAndPicturesCheckbox = document.createElement("input");
             topPaneSidebarElement.appendChild(WebInspector.SettingsUI.createSettingCheckbox(WebInspector.UIString("Capture pictures"),
-                                              this._captureLayersAndPicturesSetting, true, undefined,
+                                              this._captureLayersAndPicturesSetting, true, this._captureLayersAndPicturesCheckbox,
                                               WebInspector.UIString("Capture graphics layer positions and painted pictures")));
         }
     },
 
     _createStatusBarItems: function()
     {
         var panelStatusBarElement = this.element.createChild("div", "panel-status-bar");
         this._statusBarButtons = /** @type {!Array.<!WebInspector.StatusBarItem>} */ ([]);
 
         this.toggleTimelineButton = new WebInspector.StatusBarButton("", "record-profile-status-bar-item");
@@ skipping 287 matching lines @@
 
         this._timelineView().setFrameModel(isFrameMode ? this._frameModel() : null);
         this._overviewPane.setOverviewControls(this._overviewControls);
         this.doResize();
         this._updateSelectedRangeStats();
 
         this._stackView.show(this._searchableView.element);
     },
 
     /**
+     * @param {boolean} disabled
+     */
+    _disableUIControls: function(disabled) {
+        this._captureStacksCheckbox.disabled = disabled;
+        this._captureMemoryCheckbox.disabled = disabled;
+        if (Capabilities.canProfilePower)
+            this._capturePowerCheckbox.disabled = disabled;
+
+        if (WebInspector.experimentsSettings.timelineTracingMode.isEnabled()) {
+            this._captureTracingCheckbox.disabled = disabled;
+        } else if (WebInspector.experimentsSettings.timelineOnTraceEvents.isEnabled()) {
+            this._captureLayersAndPicturesCheckbox.disabled = disabled;
+        }
+        WebInspector.inspectorView.setCurrentPanelLocked(disabled);
+    },
+
+    /**
      * @param {boolean} userInitiated
      */
     _startRecording: function(userInitiated)
     {
         this._userInitiatedRecording = userInitiated;
         this._model.startRecording(this._captureStacksSetting.get(), this._captureMemorySetting.get(), this._captureLayersAndPicturesSetting && this._captureLayersAndPicturesSetting.get());
         if (WebInspector.experimentsSettings.timelineNoLiveUpdate.isEnabled() && this._lazyFrameModel)
             this._lazyFrameModel.setMergeRecords(false);
 
         for (var i = 0; i < this._overviewControls.length; ++i)
             this._overviewControls[i].timelineStarted();
 
         if (userInitiated)
             WebInspector.userMetrics.TimelineStarted.record();
-        WebInspector.inspectorView.setCurrentPanelLocked(true);
+        this._disableUIControls(true);
     },
 
     _stopRecording: function()
     {
         this._stopPending = true;
         this._updateToggleTimelineButton(false);
         this._userInitiatedRecording = false;
         this._model.stopRecording();
         if (this._progressElement)
             this._updateProgress(WebInspector.UIString("Retrieving events\u2026"));
 
         for (var i = 0; i < this._overviewControls.length; ++i)
             this._overviewControls[i].timelineStopped();
-        WebInspector.inspectorView.setCurrentPanelLocked(false);
+        this._disableUIControls(false);
     },
 
     _onProfilingStateChanged: function()
     {
         this._updateToggleTimelineButton(this.toggleTimelineButton.toggled);
     },
 
     /**
      * @param {boolean} toggled
      */
@@ skipping 738 matching lines @@
      * @param {!WebInspector.TimelineModel.Record} record
      * @return {boolean}
      */
     accept: function(record)
     {
         return !this._regex || this._uiUtils.testContentMatching(record, this._regex);
     },
 
     __proto__: WebInspector.TimelineModel.Filter.prototype
 }