ui/views/widget/desktop_aura/x11_whole_screen_move_loop.h

   1 // Copyright (c) 2013 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef UI_VIEWS_WIDGET_DESKTOP_AURA_X11_WHOLE_SCREEN_MOVE_LOOP_H_
   6 #define UI_VIEWS_WIDGET_DESKTOP_AURA_X11_WHOLE_SCREEN_MOVE_LOOP_H_
   7
   8 #include "base/callback.h"
   9 #include "base/compiler_specific.h"
  10 #include "base/memory/weak_ptr.h"
  11 #include "ui/events/platform/platform_event_dispatcher.h"
  12 #include "ui/gfx/image/image_skia.h"
  13 #include "ui/gfx/native_widget_types.h"
  14 #include "ui/gfx/vector2d_f.h"
  15 #include "ui/views/widget/desktop_aura/x11_move_loop.h"
  16 #include "ui/views/widget/desktop_aura/x11_move_loop_delegate.h"
  17
  18 typedef struct _XDisplay XDisplay;
  19
  20 namespace aura {
  21 class Window;
  22 }
  23
  24 namespace ui {
  25 class ScopedEventDispatcher;
  26 }
  27
  28 namespace views {
  29
  30 class Widget;
  31
  32 // Runs a nested message loop and grabs the mouse. This is used to implement
  33 // dragging.
  34 class X11WholeScreenMoveLoop : public X11MoveLoop,
  35                                public ui::PlatformEventDispatcher {
  36  public:
  37   explicit X11WholeScreenMoveLoop(X11MoveLoopDelegate* delegate);
  38   virtual ~X11WholeScreenMoveLoop();
  39
  40   // ui:::PlatformEventDispatcher:
  41   virtual bool CanDispatchEvent(const ui::PlatformEvent& event) OVERRIDE;
  42   virtual uint32_t DispatchEvent(const ui::PlatformEvent& event) OVERRIDE;
  43
  44   // X11MoveLoop:
  45   virtual bool RunMoveLoop(aura::Window* window,
  46                            gfx::NativeCursor cursor) OVERRIDE;
  47   virtual void UpdateCursor(gfx::NativeCursor cursor) OVERRIDE;
  48   virtual void EndMoveLoop() OVERRIDE;
  49
  50  private:
  51   // Grabs the pointer and keyboard, setting the mouse cursor to |cursor|.
  52   // Returns true if the grab was successful.
  53   bool GrabPointerAndKeyboard(gfx::NativeCursor cursor);
  54
  55   // Creates an input-only window to be used during the drag.
  56   Window CreateDragInputWindow(XDisplay* display);
  57
  58   // Dispatch mouse movement event to |delegate_| in a posted task.
  59   void DispatchMouseMovement();
  60
  61   X11MoveLoopDelegate* delegate_;
  62
  63   // Are we running a nested message loop from RunMoveLoop()?
  64   bool in_move_loop_;
  65   scoped_ptr<ui::ScopedEventDispatcher> nested_dispatcher_;
  66
  67   bool should_reset_mouse_flags_;
  68
  69   // An invisible InputOnly window . We create this window so we can track the
  70   // cursor wherever it goes on screen during a drag, since normal windows
  71   // don't receive pointer motion events outside of their bounds.
  72   ::Window grab_input_window_;
  73
  74   base::Closure quit_closure_;
  75
  76   // Keeps track of whether the move-loop is cancled by the user (e.g. by
  77   // pressing escape).
  78   bool canceled_;
  79
  80   // Keeps track of whether we still have a pointer grab at the end of the loop.
  81   bool has_grab_;
  82
  83   XMotionEvent last_xmotion_;
  84   base::WeakPtrFactory<X11WholeScreenMoveLoop> weak_factory_;
  85
  86   DISALLOW_COPY_AND_ASSIGN(X11WholeScreenMoveLoop);
  87 };
  88
  89 }  // namespace views
  90
  91 #endif  // UI_VIEWS_WIDGET_DESKTOP_AURA_X11_WHOLE_SCREEN_MOVE_LOOP_H_