1 // Copyright (c) 2012 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_WINDOW_EVENT_FILTER_H_ 6 #define UI_VIEWS_WIDGET_DESKTOP_AURA_X11_WINDOW_EVENT_FILTER_H_ 7 8 #include <X11/Xlib.h> 9 10 #include "base/compiler_specific.h" 11 #include "base/message_loop/message_loop.h" 12 #include "ui/events/event_handler.h" 13 #include "ui/gfx/x/x11_atom_cache.h" 14 #include "ui/gfx/x/x11_types.h" 15 #include "ui/views/views_export.h" 16 17 namespace aura { 18 class Window; 19 } 20 21 namespace gfx { 22 class Point; 23 } 24 25 namespace views { 26 class DesktopWindowTreeHost; 27 class NativeWidgetAura; 28 29 // An EventFilter that sets properties on X11 windows. 30 class VIEWS_EXPORT X11WindowEventFilter : public ui::EventHandler { 31 public: 32 explicit X11WindowEventFilter(DesktopWindowTreeHost* window_tree_host); 33 virtual ~X11WindowEventFilter(); 34 35 // Overridden from ui::EventHandler: 36 virtual void OnMouseEvent(ui::MouseEvent* event) OVERRIDE; 37 38 private: 39 // Called when the user clicked the caption area. 40 void OnClickedCaption(ui::MouseEvent* event, 41 int previous_click_component); 42 43 // Called when the user clicked the maximize button. 44 void OnClickedMaximizeButton(ui::MouseEvent* event); 45 46 void ToggleMaximizedState(); 47 48 // Dispatches a _NET_WM_MOVERESIZE message to the window manager to tell it 49 // to act as if a border or titlebar drag occurred. 50 bool DispatchHostWindowDragMovement(int hittest, 51 const gfx::Point& screen_location); 52 53 // The display and the native X window hosting the root window. 54 XDisplay* xdisplay_; 55 ::Window xwindow_; 56 57 // The native root window. 58 ::Window x_root_window_; 59 60 ui::X11AtomCache atom_cache_; 61 62 DesktopWindowTreeHost* window_tree_host_; 63 64 // True if |xwindow_| is the current _NET_ACTIVE_WINDOW. 65 bool is_active_; 66 67 // The non-client component for the target of a MouseEvent. Mouse events can 68 // be destructive to the window tree, which can cause the component of a 69 // ui::EF_IS_DOUBLE_CLICK event to no longer be the same as that of the 70 // initial click. Acting on a double click should only occur for matching 71 // components. 72 int click_component_; 73 74 DISALLOW_COPY_AND_ASSIGN(X11WindowEventFilter); 75 }; 76 77 } // namespace views 78 79 #endif // UI_VIEWS_WIDGET_DESKTOP_AURA_X11_WINDOW_EVENT_FILTER_H_ 80