resize_area.cc revision b2df76ea8fec9e32f6f3718986dba0d95315b29c 
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
16namespace views {
17
18const char ResizeArea::kViewClassName[] = "ResizeArea";
19
20////////////////////////////////////////////////////////////////////////////////
21// ResizeArea
22
23ResizeArea::ResizeArea(ResizeAreaDelegate* delegate)
24    : delegate_(delegate),
25      initial_position_(0) {
26}
27
28ResizeArea::~ResizeArea() {
29}
30
31const char* ResizeArea::GetClassName() const {
32  return kViewClassName;
33}
34
35gfx::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
46bool 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
60bool ResizeArea::OnMouseDragged(const ui::MouseEvent& event) {
61  if (!event.IsLeftMouseButton())
62    return false;
63
64  ReportResizeAmount(event.x(), false);
65  return true;
66}
67
68void ResizeArea::OnMouseReleased(const ui::MouseEvent& event) {
69  ReportResizeAmount(event.x(), true);
70}
71
72void ResizeArea::OnMouseCaptureLost() {
73  ReportResizeAmount(initial_position_, true);
74}
75
76void ResizeArea::GetAccessibleState(ui::AccessibleViewState* state) {
77  state->role = ui::AccessibilityTypes::ROLE_SEPARATOR;
78}
79
80void 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