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1 // Copyright 2014 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 "chrome/browser/ui/views/panels/x11_panel_resizer.h" | |
6 | |
7 #include "chrome/browser/ui/panels/panel.h" | |
8 #include "chrome/browser/ui/panels/panel_manager.h" | |
9 #include "ui/aura/window.h" | |
10 #include "ui/aura/window_delegate.h" | |
11 #include "ui/base/hit_test.h" | |
12 #include "ui/events/event.h" | |
13 #include "ui/events/event_utils.h" | |
14 #include "ui/views/view.h" | |
15 | |
16 namespace { | |
17 | |
18 // Returns true if the window can be resized via |component|. | |
19 bool IsWindowBorder(int component) { | |
20 return component == HTBOTTOM || | |
21 component == HTBOTTOMLEFT || | |
22 component == HTBOTTOMRIGHT || | |
23 component == HTLEFT || | |
24 component == HTRIGHT || | |
25 component == HTTOP || | |
26 component == HTTOPLEFT || | |
27 component == HTTOPRIGHT; | |
28 } | |
29 | |
30 } // namespace | |
31 | |
32 X11PanelResizer::X11PanelResizer(Panel* panel, aura::Window* window) | |
33 : panel_(panel), | |
34 window_(window), | |
35 resize_state_(NOT_RESIZING), | |
36 resize_component_(HTNOWHERE) { | |
37 } | |
38 | |
39 X11PanelResizer::~X11PanelResizer() { | |
40 StopResizing(NULL, true); | |
41 } | |
42 | |
43 void X11PanelResizer::OnMousePressed(ui::MouseEvent* event) { | |
44 if (resize_state_ != NOT_RESIZING || | |
45 event->type() != ui::ET_MOUSE_PRESSED || | |
46 !event->IsLeftMouseButton() || | |
47 !event->HasNativeEvent()) { | |
48 return; | |
49 } | |
50 | |
51 int component = window_->delegate()->GetNonClientComponent(event->location()); | |
52 if (!IsWindowBorder(component)) | |
53 return; | |
54 | |
55 // Set capture so that we get notified of all subsequent events. | |
56 window_->SetCapture(); | |
57 | |
58 resize_state_ = RESIZE_CAN_START; | |
59 initial_press_location_in_screen_ = ui::EventSystemLocationFromNative( | |
60 event->native_event()); | |
61 resize_component_ = component; | |
62 event->StopPropagation(); | |
63 } | |
64 | |
65 void X11PanelResizer::OnMouseDragged(ui::MouseEvent* event) { | |
66 if (resize_state_ != RESIZE_CAN_START && | |
67 resize_state_ != RESIZE_IN_PROGRESS) { | |
68 return; | |
69 } | |
70 | |
71 if (!event->HasNativeEvent()) | |
72 return; | |
73 | |
74 // Get the location in screen coordinates from the XEvent because converting | |
75 // the mouse location to screen coordinates using ScreenPositionClient returns | |
76 // an incorrect location while the panel is moving. See crbug.com/353393 for | |
77 // more details. | |
78 // TODO: Fix conversion to screen coordinates. | |
79 gfx::Point location_in_screen = ui::EventSystemLocationFromNative( | |
80 event->native_event()); | |
81 if (resize_state_ == RESIZE_CAN_START) { | |
82 gfx::Vector2d delta = | |
83 location_in_screen - initial_press_location_in_screen_; | |
84 if (views::View::ExceededDragThreshold(delta)) { | |
85 resize_state_ = RESIZE_IN_PROGRESS; | |
86 panel_->manager()->StartResizingByMouse(panel_, location_in_screen, | |
87 resize_component_); | |
88 } | |
89 } | |
90 | |
91 if (resize_state_ == RESIZE_IN_PROGRESS) | |
92 panel_->manager()->ResizeByMouse(location_in_screen); | |
93 | |
94 event->StopPropagation(); | |
95 } | |
96 | |
97 void X11PanelResizer::StopResizing(ui::MouseEvent* event, bool canceled) { | |
98 if (resize_state_ == NOT_RESIZING) | |
99 return; | |
100 | |
101 if (resize_state_ == RESIZE_IN_PROGRESS) { | |
102 panel_->manager()->EndResizingByMouse(canceled); | |
103 window_->ReleaseCapture(); | |
104 } | |
105 if (event) | |
106 event->StopPropagation(); | |
107 resize_state_ = NOT_RESIZING; | |
108 } | |
109 | |
110 void X11PanelResizer::OnMouseEvent(ui::MouseEvent* event) { | |
111 switch (event->type()) { | |
112 case ui::ET_MOUSE_PRESSED: | |
113 OnMousePressed(event); | |
114 break; | |
115 case ui::ET_MOUSE_DRAGGED: | |
116 OnMouseDragged(event); | |
117 break; | |
118 case ui::ET_MOUSE_RELEASED: | |
119 StopResizing(event, false); | |
120 break; | |
121 case ui::ET_MOUSE_CAPTURE_CHANGED: | |
122 StopResizing(event, true); | |
123 break; | |
124 default: | |
125 break; | |
126 } | |
127 } | |
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