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1 // Copyright (c) 2011 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 #include "ui/aura_shell/default_container_event_filter.h" | |
6 | |
7 #include "ui/aura/event.h" | |
8 #include "ui/aura/window.h" | |
9 #include "ui/aura_shell/default_container_layout_manager.h" | |
10 #include "ui/aura_shell/window_frame.h" | |
11 #include "ui/aura_shell/window_util.h" | |
12 #include "ui/base/hit_test.h" | |
13 | |
14 namespace { | |
15 | |
16 // Sends OnWindowHoveredChanged(|hovered|) to the WindowFrame for |window|, | |
17 // which may be NULL. | |
18 void WindowHoverChanged(aura::Window* window, bool hovered) { | |
19 if (!window) | |
20 return; | |
21 aura_shell::WindowFrame* window_frame = | |
22 static_cast<aura_shell::WindowFrame*>( | |
23 window->GetProperty(aura_shell::kWindowFrameKey)); | |
24 if (!window_frame) | |
25 return; | |
26 window_frame->OnWindowHoverChanged(hovered); | |
27 } | |
28 | |
29 } // namespace | |
30 | |
31 namespace aura_shell { | |
32 namespace internal { | |
33 | |
34 DefaultContainerEventFilter::DefaultContainerEventFilter(aura::Window* owner) | |
35 : ToplevelWindowEventFilter(owner), | |
36 drag_state_(DRAG_NONE), | |
37 hovered_window_(NULL) { | |
38 } | |
39 | |
40 DefaultContainerEventFilter::~DefaultContainerEventFilter() { | |
41 } | |
42 | |
43 bool DefaultContainerEventFilter::PreHandleMouseEvent(aura::Window* target, | |
44 aura::MouseEvent* event) { | |
45 DefaultContainerLayoutManager* layout_manager = | |
46 static_cast<DefaultContainerLayoutManager*>(owner()->layout_manager()); | |
47 DCHECK(layout_manager); | |
48 | |
49 // TODO(oshima|derat): Incorporate the logic below and introduce DragObserver | |
50 // (or something similar) to decouple DCLM. | |
51 | |
52 // Notify layout manager that drag event may move/resize the target wnidow. | |
53 if (event->type() == ui::ET_MOUSE_DRAGGED && drag_state_ == DRAG_NONE) | |
54 layout_manager->PrepareForMoveOrResize(target, event); | |
55 | |
56 bool handled = ToplevelWindowEventFilter::PreHandleMouseEvent(target, event); | |
57 | |
58 switch (event->type()) { | |
59 case ui::ET_MOUSE_DRAGGED: | |
60 // Cancel move/resize if the event wasn't handled, or | |
61 // drag_state_ didn't move to MOVE or RESIZE. | |
62 if (handled) { | |
63 switch (drag_state_) { | |
64 case DRAG_NONE: | |
65 if (!UpdateDragState()) | |
66 layout_manager->CancelMoveOrResize(target, event); | |
67 break; | |
68 case DRAG_MOVE: | |
69 layout_manager->ProcessMove(target, event); | |
70 break; | |
71 case DRAG_RESIZE: | |
72 break; | |
73 } | |
74 } else { | |
75 layout_manager->CancelMoveOrResize(target, event); | |
76 } | |
77 break; | |
78 case ui::ET_MOUSE_ENTERED: | |
79 UpdateHoveredWindow(GetActivatableWindow(target)); | |
80 break; | |
81 case ui::ET_MOUSE_EXITED: | |
82 UpdateHoveredWindow(NULL); | |
83 break; | |
84 case ui::ET_MOUSE_RELEASED: | |
85 if (drag_state_ == DRAG_MOVE) | |
86 layout_manager->EndMove(target, event); | |
87 else if (drag_state_ == DRAG_RESIZE) | |
88 layout_manager->EndResize(target, event); | |
89 | |
90 drag_state_ = DRAG_NONE; | |
91 break; | |
92 default: | |
93 break; | |
94 } | |
95 return handled; | |
96 } | |
97 | |
98 bool DefaultContainerEventFilter::UpdateDragState() { | |
99 DCHECK_EQ(DRAG_NONE, drag_state_); | |
100 switch (window_component()) { | |
101 case HTCAPTION: | |
102 drag_state_ = DRAG_MOVE; | |
103 break; | |
104 case HTTOP: | |
105 case HTTOPRIGHT: | |
106 case HTRIGHT: | |
107 case HTBOTTOMRIGHT: | |
108 case HTBOTTOM: | |
109 case HTBOTTOMLEFT: | |
110 case HTLEFT: | |
111 case HTTOPLEFT: | |
112 case HTGROWBOX: | |
113 drag_state_ = DRAG_RESIZE; | |
114 break; | |
115 default: | |
116 return false; | |
117 } | |
118 return true; | |
119 } | |
120 | |
121 void DefaultContainerEventFilter::UpdateHoveredWindow( | |
122 aura::Window* toplevel_window) { | |
123 if (toplevel_window == hovered_window_) | |
124 return; | |
125 WindowHoverChanged(hovered_window_, false); | |
126 hovered_window_ = toplevel_window; | |
127 WindowHoverChanged(hovered_window_, true); | |
128 } | |
129 | |
130 } // internal | |
131 } // aura_shell | |
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