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 #include "ui/views/controls/resize_area.h"
6
7 #include "base/logging.h"
8 #include "ui/base/accessibility/accessible_view_state.h"
9 #include "ui/base/resource/resource_bundle.h"
10 #include "ui/views/controls/resize_area_delegate.h"
11
12 #if defined(USE_AURA)
13 #include "ui/base/cursor/cursor.h"
14 #endif
15
16 namespace views {
17
18 const char ResizeArea::kViewClassName[] = "ResizeArea";
19
20 ////////////////////////////////////////////////////////////////////////////////
21 // ResizeArea
22
ResizeArea(ResizeAreaDelegate * delegate)23 ResizeArea::ResizeArea(ResizeAreaDelegate* delegate)
24 : delegate_(delegate),
25 initial_position_(0) {
26 }
27
~ResizeArea()28 ResizeArea::~ResizeArea() {
29 }
30
GetClassName() const31 const char* ResizeArea::GetClassName() const {
32 return kViewClassName;
33 }
34
GetCursor(const ui::MouseEvent & event)35 gfx::NativeCursor ResizeArea::GetCursor(const ui::MouseEvent& event) {
36 if (!enabled())
37 return gfx::kNullCursor;
38 #if defined(USE_AURA)
39 return ui::kCursorEastWestResize;
40 #elif defined(OS_WIN)
41 static HCURSOR g_resize_cursor = LoadCursor(NULL, IDC_SIZEWE);
42 return g_resize_cursor;
43 #endif
44 }
45
OnMousePressed(const ui::MouseEvent & event)46 bool ResizeArea::OnMousePressed(const ui::MouseEvent& event) {
47 if (!event.IsOnlyLeftMouseButton())
48 return false;
49
50 // The resize area obviously will move once you start dragging so we need to
51 // convert coordinates to screen coordinates so that we don't lose our
52 // bearings.
53 gfx::Point point(event.x(), 0);
54 View::ConvertPointToScreen(this, &point);
55 initial_position_ = point.x();
56
57 return true;
58 }
59
OnMouseDragged(const ui::MouseEvent & event)60 bool ResizeArea::OnMouseDragged(const ui::MouseEvent& event) {
61 if (!event.IsLeftMouseButton())
62 return false;
63
64 ReportResizeAmount(event.x(), false);
65 return true;
66 }
67
OnMouseReleased(const ui::MouseEvent & event)68 void ResizeArea::OnMouseReleased(const ui::MouseEvent& event) {
69 ReportResizeAmount(event.x(), true);
70 }
71
OnMouseCaptureLost()72 void ResizeArea::OnMouseCaptureLost() {
73 ReportResizeAmount(initial_position_, true);
74 }
75
GetAccessibleState(ui::AccessibleViewState * state)76 void ResizeArea::GetAccessibleState(ui::AccessibleViewState* state) {
77 state->role = ui::AccessibilityTypes::ROLE_SEPARATOR;
78 }
79
ReportResizeAmount(int resize_amount,bool last_update)80 void ResizeArea::ReportResizeAmount(int resize_amount, bool last_update) {
81 gfx::Point point(resize_amount, 0);
82 View::ConvertPointToScreen(this, &point);
83 resize_amount = point.x() - initial_position_;
84 delegate_->OnResize(base::i18n::IsRTL() ? -resize_amount : resize_amount,
85 last_update);
86 }
87
88 } // namespace views
89