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/accessibility/ax_view_state.h"
9 #include "ui/base/cursor/cursor.h"
10 #include "ui/base/resource/resource_bundle.h"
11 #include "ui/views/controls/resize_area_delegate.h"
12 #include "ui/views/native_cursor.h"
13
14 namespace views {
15
16 const char ResizeArea::kViewClassName[] = "ResizeArea";
17
18 ////////////////////////////////////////////////////////////////////////////////
19 // ResizeArea
20
ResizeArea(ResizeAreaDelegate * delegate)21 ResizeArea::ResizeArea(ResizeAreaDelegate* delegate)
22 : delegate_(delegate),
23 initial_position_(0) {
24 }
25
~ResizeArea()26 ResizeArea::~ResizeArea() {
27 }
28
GetClassName() const29 const char* ResizeArea::GetClassName() const {
30 return kViewClassName;
31 }
32
GetCursor(const ui::MouseEvent & event)33 gfx::NativeCursor ResizeArea::GetCursor(const ui::MouseEvent& event) {
34 return enabled() ? GetNativeEastWestResizeCursor()
35 : gfx::kNullCursor;
36 }
37
OnMousePressed(const ui::MouseEvent & event)38 bool ResizeArea::OnMousePressed(const ui::MouseEvent& event) {
39 if (!event.IsOnlyLeftMouseButton())
40 return false;
41
42 // The resize area obviously will move once you start dragging so we need to
43 // convert coordinates to screen coordinates so that we don't lose our
44 // bearings.
45 gfx::Point point(event.x(), 0);
46 View::ConvertPointToScreen(this, &point);
47 initial_position_ = point.x();
48
49 return true;
50 }
51
OnMouseDragged(const ui::MouseEvent & event)52 bool ResizeArea::OnMouseDragged(const ui::MouseEvent& event) {
53 if (!event.IsLeftMouseButton())
54 return false;
55
56 ReportResizeAmount(event.x(), false);
57 return true;
58 }
59
OnMouseReleased(const ui::MouseEvent & event)60 void ResizeArea::OnMouseReleased(const ui::MouseEvent& event) {
61 ReportResizeAmount(event.x(), true);
62 }
63
OnMouseCaptureLost()64 void ResizeArea::OnMouseCaptureLost() {
65 ReportResizeAmount(initial_position_, true);
66 }
67
GetAccessibleState(ui::AXViewState * state)68 void ResizeArea::GetAccessibleState(ui::AXViewState* state) {
69 state->role = ui::AX_ROLE_SPLITTER;
70 }
71
ReportResizeAmount(int resize_amount,bool last_update)72 void ResizeArea::ReportResizeAmount(int resize_amount, bool last_update) {
73 gfx::Point point(resize_amount, 0);
74 View::ConvertPointToScreen(this, &point);
75 resize_amount = point.x() - initial_position_;
76 delegate_->OnResize(base::i18n::IsRTL() ? -resize_amount : resize_amount,
77 last_update);
78 }
79
80 } // namespace views
81