Allow the cursor to warp even when a window is dragged

ash/wm/default_window_resizer.cc

Index: ash/wm/default_window_resizer.cc
diff --git a/ash/wm/default_window_resizer.cc b/ash/wm/default_window_resizer.cc
index 4368c73b88ba14b3230441fe40d1b8a83ebc0d22..8aa50a5dc4466a172d2783152f11e5cd5b03ea19 100644
--- a/ash/wm/default_window_resizer.cc
+++ b/ash/wm/default_window_resizer.cc
@@ -5,8 +5,10 @@
 #include "ash/wm/default_window_resizer.h"
 
 #include "ash/shell.h"
+#include "ash/wm/coordinate_conversion.h"
 #include "ash/wm/cursor_manager.h"
 #include "ui/aura/client/aura_constants.h"
+#include "ui/aura/client/screen_position_client.h"
 #include "ui/aura/env.h"
 #include "ui/aura/root_window.h"
 #include "ui/aura/window.h"
@@ -33,9 +35,26 @@ DefaultWindowResizer::Create(aura::Window* window,
 }
 
 void DefaultWindowResizer::Drag(const gfx::Point& location, int event_flags) {
+  std::pair<aura::RootWindow*, gfx::Point> actual_location =
+      wm::GetRootWindowRelativeToWindow(details_.window->parent(), location);
+
+  aura::RootWindow* current_root = actual_location.first;
+  gfx::Point location_in_root = actual_location.second;
+  gfx::Point location_in_screen = actual_location.second;
+  aura::client::GetScreenPositionClient(current_root)->
+      ConvertPointToScreen(current_root, &location_in_screen);

[sky, 2012/08/03 17:07:18]

This is too much code for something that seems like we're going to want to do a
lot. Add:
gfx::Point ConvertPointToScreen(aura::Window*, gfx::Point). to your
coordinate_conversion file.

[Yusuke Sato, 2012/08/03 23:18:45]

Done.

+
+  // TODO(mazda|yusukes): Implement dragging an item from one display to another
+  if (current_root != details_.window->GetRootWindow())
+    return;
+
+  aura::client::GetScreenPositionClient(current_root)->
+      ConvertPointFromScreen(current_root, &location_in_root);
+
   int grid_size = event_flags & ui::EF_CONTROL_DOWN ?
                   0 : ash::Shell::GetInstance()->GetGridSize();
-  gfx::Rect bounds(CalculateBoundsForDrag(details_, location, grid_size));
+  gfx::Rect bounds(
+      CalculateBoundsForDrag(details_, location_in_root, grid_size));

[sky, 2012/08/03 17:07:18]

Why does this need to change?

[Yusuke Sato, 2012/08/03 23:18:45]

Reverted.

   if (bounds != details_.window->bounds()) {
     did_move_or_resize_ = true;
     details_.window->SetBounds(bounds);