Update panel layout immediately after the user has finished resizing a panel.

chrome/browser/ui/views/panels/panel_view.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/ui/views/panels/panel_view.h"
 
 #include <map>
 #include "base/logging.h"
 #include "base/message_loop/message_loop.h"
 #include "base/strings/utf_string_conversions.h"
 #include "chrome/app/chrome_command_ids.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/ui/host_desktop.h"
 #include "chrome/browser/ui/panels/panel.h"
 #include "chrome/browser/ui/panels/panel_bounds_animation.h"
 #include "chrome/browser/ui/panels/panel_manager.h"
 #include "chrome/browser/ui/panels/stacked_panel_collection.h"
 #include "chrome/browser/ui/views/auto_keep_alive.h"
 #include "chrome/browser/ui/views/panels/panel_frame_view.h"
 #include "content/public/browser/render_view_host.h"
 #include "content/public/browser/render_widget_host_view.h"
 #include "content/public/browser/web_contents.h"
+#include "ui/aura/window.h"
+#include "ui/aura/window_tree_host.h"
 #include "ui/gfx/image/image.h"
 #include "ui/gfx/path.h"
 #include "ui/gfx/screen.h"
 #include "ui/views/controls/button/image_button.h"
 #include "ui/views/controls/webview/webview.h"
 #include "ui/views/widget/widget.h"
 
 #if defined(OS_WIN)
 #include "base/win/windows_version.h"
 #include "chrome/browser/shell_integration.h"
 #include "chrome/browser/ui/views/panels/taskbar_window_thumbnailer_win.h"
 #include "ui/base/win/shell.h"
 #include "ui/gfx/icon_util.h"
 #include "ui/views/win/hwnd_util.h"
 #endif
 
+#if defined(USE_X11) && !defined(OS_CHROMEOS)
+#include "chrome/browser/ui/views/panels/x11_panel_resizer.h"
+#include "ui/views/widget/desktop_aura/desktop_window_tree_host_x11.h"
+#endif
+
 namespace {
 
 #if defined(OS_WIN)
 // If the height of a stacked panel shrinks below this threshold during the
 // user resizing, it will be treated as minimized.
 const int kStackedPanelHeightShrinkThresholdToBecomeMinimized =
     panel::kTitlebarHeight + 20;
 #endif
 
 // Supported accelerators.
@@ skipping 251 matching lines @@
         iter->first, ui::AcceleratorManager::kNormalPriority, this);
   }
 
 #if defined(OS_WIN)
   ui::win::SetAppIdForWindow(
       ShellIntegration::GetAppModelIdForProfile(
           base::UTF8ToWide(panel->app_name()), panel->profile()->GetPath()),
       views::HWNDForWidget(window_));
   ui::win::PreventWindowFromPinning(views::HWNDForWidget(window_));
 #endif
+
+#if defined(USE_X11) && !defined(OS_CHROMEOS)
+  // Swap the default non client event handler with one which handles resizes
+  // for panels entirely within Chrome. This is needed because it is not
+  // possible to tell when a resize performed by the window manager ends.
+  views::DesktopWindowTreeHostX11* host =
+      views::DesktopWindowTreeHostX11::GetHostForXID(
+          window_->GetNativeView()->GetHost()->GetAcceleratedWidget());
+  scoped_ptr<ui::EventHandler> resizer(
+      new X11PanelResizer(panel_.get(), window_->GetNativeWindow()));
+  host->SwapNonClientEventHandler(resizer.Pass());
+#endif
 }
 
 PanelView::~PanelView() {
 }
 
 void PanelView::ShowPanel() {
   ShowPanelInactive();
   ActivatePanel();
 }
 
@@ skipping 805 matching lines @@
   // SWP_FRAMECHANGED flag must be called in order for the cached window data
   // to be updated properly.
   // http://msdn.microsoft.com/en-us/library/windows/desktop/ms633591(v=vs.85).aspx
   if (update_frame) {
     ::SetWindowPos(native_window, NULL, 0, 0, 0, 0,
                    SWP_FRAMECHANGED | SWP_NOMOVE | SWP_NOSIZE |
                        SWP_NOZORDER | SWP_NOACTIVATE);
   }
 }
 #endif