SetDeviceScaleFactorForTest

ui/views/widget/desktop_aura/desktop_window_tree_host_win.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_win.h"
 
 #include "base/memory/ptr_util.h"
 #include "third_party/skia/include/core/SkPath.h"
 #include "third_party/skia/include/core/SkRegion.h"
 #include "ui/aura/client/aura_constants.h"
 #include "ui/aura/client/cursor_client.h"
 #include "ui/aura/client/focus_client.h"
 #include "ui/aura/window_event_dispatcher.h"
 #include "ui/aura/window_property.h"
 #include "ui/base/cursor/cursor_loader_win.h"
 #include "ui/base/ime/input_method.h"
 #include "ui/base/win/shell.h"
 #include "ui/compositor/compositor_constants.h"
 #include "ui/compositor/paint_context.h"
+#include "ui/display/display.h"
 #include "ui/display/win/dpi.h"
 #include "ui/display/win/screen_win.h"
 #include "ui/gfx/geometry/insets.h"
 #include "ui/gfx/geometry/vector2d.h"
 #include "ui/gfx/native_widget_types.h"
 #include "ui/gfx/path.h"
 #include "ui/gfx/path_win.h"
 #include "ui/native_theme/native_theme_aura.h"
 #include "ui/native_theme/native_theme_win.h"
 #include "ui/views/corewm/tooltip_win.h"
@@ skipping 50 matching lines @@
     DesktopNativeWidgetAura* desktop_native_widget_aura)
     : message_handler_(new HWNDMessageHandler(this)),
       native_widget_delegate_(native_widget_delegate),
       desktop_native_widget_aura_(desktop_native_widget_aura),
       content_window_(NULL),
       drag_drop_client_(NULL),
       should_animate_window_close_(false),
       pending_close_(false),
       has_non_client_view_(false),
       tooltip_(NULL) {
+  display::Screen::GetScreen()->AddObserver(this);
 }
 
 DesktopWindowTreeHostWin::~DesktopWindowTreeHostWin() {
+  display::Screen::GetScreen()->RemoveObserver(this);
   // WARNING: |content_window_| has been destroyed by the time we get here.
   desktop_native_widget_aura_->OnDesktopWindowTreeHostDestroyed(this);
   DestroyDispatcher();
 }
 
 // static
 aura::Window* DesktopWindowTreeHostWin::GetContentWindowForHWND(HWND hwnd) {
   // All HWND's we create should have WindowTreeHost instances associated with
   // them. There are exceptions like the content layer creating HWND's which
   // are not associated with WindowTreeHost instances.
@@ skipping 489 matching lines @@
   window_expansion_bottom_right_delta_ = bottom_right_delta;
   SetBounds(bounds_without_expansion);
 }
 
 void DesktopWindowTreeHostWin::OnWindowHidingAnimationCompleted() {
   if (pending_close_)
     message_handler_->Close();
 }
 
 ////////////////////////////////////////////////////////////////////////////////
+// DesktopWindowTreeHostWin, DisplayObserver implementation:
+void DesktopWindowTreeHostWin::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()) {
+    HandleWindowScaleFactorChanged(display.device_scale_factor());
+  }
+}
+
+////////////////////////////////////////////////////////////////////////////////
 // DesktopWindowTreeHostWin, HWNDMessageHandlerDelegate implementation:
 
 bool DesktopWindowTreeHostWin::HasNonClientView() const {
   return has_non_client_view_;
 }
 
 FrameMode DesktopWindowTreeHostWin::GetFrameMode() const {
   return GetWidget()->ShouldUseNativeFrame() ? FrameMode::SYSTEM_DRAWN
                                              : FrameMode::CUSTOM_DRAWN;
 }
@@ skipping 385 matching lines @@
 
 // static
 DesktopWindowTreeHost* DesktopWindowTreeHost::Create(
     internal::NativeWidgetDelegate* native_widget_delegate,
     DesktopNativeWidgetAura* desktop_native_widget_aura) {
   return new DesktopWindowTreeHostWin(native_widget_delegate,
                                       desktop_native_widget_aura);
 }
 
 }  // namespace views