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/base/cursor/cursor.h"
  12 #include "ui/events/platform/platform_event_dispatcher.h"
  13 #include "ui/gfx/geometry/vector2d_f.h"
  14 #include "ui/gfx/image/image_skia.h"
  15 #include "ui/gfx/native_widget_types.h"
  16 #include "ui/gfx/x/x11_types.h"
  17 #include "ui/views/widget/desktop_aura/x11_move_loop.h"
  18 #include "ui/views/widget/desktop_aura/x11_move_loop_delegate.h"
  19
  20 namespace aura {
  21 class Window;
  22 }
  23
  24 namespace ui {
  25 class MouseEvent;
  26 class ScopedEventDispatcher;
  27 }
  28
  29 namespace views {
  30
  31 class Widget;
  32
  33 // Runs a nested message loop and grabs the mouse. This is used to implement
  34 // dragging.
  35 class X11WholeScreenMoveLoop : public X11MoveLoop,
  36                                public ui::PlatformEventDispatcher {
  37  public:
  38   explicit X11WholeScreenMoveLoop(X11MoveLoopDelegate* delegate);
  39   ~X11WholeScreenMoveLoop() override;
  40
  41   // ui:::PlatformEventDispatcher:
  42   bool CanDispatchEvent(const ui::PlatformEvent& event) override;
  43   uint32_t DispatchEvent(const ui::PlatformEvent& event) override;
  44
  45   // X11MoveLoop:
  46   bool RunMoveLoop(aura::Window* window, gfx::NativeCursor cursor) override;
  47   void UpdateCursor(gfx::NativeCursor cursor) override;
  48   void EndMoveLoop() override;
  49
  50  private:
  51   // Grabs the pointer, setting the mouse cursor to |cursor|. Returns true if
  52   // successful.
  53   bool GrabPointer(gfx::NativeCursor cursor);
  54
  55   void GrabEscKey();
  56
  57   // Creates an input-only window to be used during the drag.
  58   XID CreateDragInputWindow(XDisplay* display);
  59
  60   // Dispatch mouse movement event to |delegate_| in a posted task.
  61   void DispatchMouseMovement();
  62
  63   X11MoveLoopDelegate* delegate_;
  64
  65   // Are we running a nested message loop from RunMoveLoop()?
  66   bool in_move_loop_;
  67   scoped_ptr<ui::ScopedEventDispatcher> nested_dispatcher_;
  68
  69   // Cursor in use prior to the move loop starting. Restored when the move loop
  70   // quits.
  71   gfx::NativeCursor initial_cursor_;
  72
  73   bool should_reset_mouse_flags_;
  74
  75   // An invisible InputOnly window. Keyboard grab and sometimes mouse grab
  76   // are set on this window.
  77   XID grab_input_window_;
  78
  79   // Whether the pointer was grabbed on |grab_input_window_|.
  80   bool grabbed_pointer_;
  81
  82   base::Closure quit_closure_;
  83
  84   // Keeps track of whether the move-loop is cancled by the user (e.g. by
  85   // pressing escape).
  86   bool canceled_;
  87
  88   scoped_ptr<ui::MouseEvent> last_motion_in_screen_;
  89   base::WeakPtrFactory<X11WholeScreenMoveLoop> weak_factory_;
  90
  91   DISALLOW_COPY_AND_ASSIGN(X11WholeScreenMoveLoop);
  92 };
  93
  94 }  // namespace views
  95
  96 #endif  // UI_VIEWS_WIDGET_DESKTOP_AURA_X11_WHOLE_SCREEN_MOVE_LOOP_H_