SetDeviceScaleFactorForTest

ui/views/widget/desktop_aura/desktop_window_tree_host_x11.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 "ui/views/widget/desktop_aura/desktop_window_tree_host_x11.h"
 
 #include <X11/extensions/shape.h>
 #include <X11/extensions/XInput2.h>
 #include <X11/Xatom.h>
 #include <X11/Xregion.h>
@@ skipping 165 matching lines @@
       use_argb_visual_(false),
       drag_drop_client_(NULL),
       native_widget_delegate_(native_widget_delegate),
       desktop_native_widget_aura_(desktop_native_widget_aura),
       content_window_(NULL),
       window_parent_(NULL),
       custom_window_shape_(false),
       urgency_hint_set_(false),
       activatable_(true),
       close_widget_factory_(this) {
+  display::Screen::GetScreen()->AddObserver(this);
 }
 
 DesktopWindowTreeHostX11::~DesktopWindowTreeHostX11() {
+  display::Screen::GetScreen()->RemoveObserver(this);
   window()->ClearProperty(kHostForRootWindow);
   aura::client::SetWindowMoveClient(window(), NULL);
   desktop_native_widget_aura_->OnDesktopWindowTreeHostDestroyed(this);
   DestroyDispatcher();
 }
 
 // static
 aura::Window* DesktopWindowTreeHostX11::GetContentWindowForXID(XID xid) {
   aura::WindowTreeHost* host =
       aura::WindowTreeHost::GetForAcceleratedWidget(xid);
@@ skipping 1830 matching lines @@
       break;
     }
     case SelectionNotify: {
       drag_drop_client_->OnSelectionNotify(xev->xselection);
       break;
     }
   }
   return ui::POST_DISPATCH_STOP_PROPAGATION;
 }
 
+void DesktopWindowTreeHostX11::OnDisplayMetricsChanged(
+    const display::Display& display,
+    uint32_t changed_metrics) {
+  display::Screen* screen = display::Screen::GetScreen();
+  if ((changed_metrics & DisplayObserver::DISPLAY_METRIC_DEVICE_SCALE_FACTOR) &&
+      screen->GetDisplayNearestWindow(window()).id() == display.id()) {
+    OnHostResized(bounds_in_pixels_.size());
+    ResetWindowRegion();
+  }
+}
+
 void DesktopWindowTreeHostX11::DelayedResize(const gfx::Size& size_in_pixels) {
   OnHostResized(size_in_pixels);
   ResetWindowRegion();
   delayed_resize_task_.Cancel();
 }
 
 gfx::Rect DesktopWindowTreeHostX11::GetWorkAreaBoundsInPixels() const {
   std::vector<int> value;
   if (ui::GetIntArrayProperty(x_root_window_, "_NET_WORKAREA", &value) &&
       value.size() >= 4) {
@@ skipping 45 matching lines @@
   if (linux_ui) {
     ui::NativeTheme* native_theme = linux_ui->GetNativeTheme(window);
     if (native_theme)
       return native_theme;
   }
 
   return ui::NativeThemeAura::instance();
 }
 
 }  // namespace views