1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
|
// Copyright 2008, Google Inc.
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following disclaimer
// in the documentation and/or other materials provided with the
// distribution.
// * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#include "chrome/views/button_dropdown.h"
#include "base/message_loop.h"
#include "chrome/browser/back_forward_menu_model.h"
#include "chrome/common/l10n_util.h"
#include "chrome/views/view_menu_delegate.h"
#include "chrome/views/view_container.h"
#include "generated_resources.h"
namespace ChromeViews {
// How long to wait before showing the menu
static const int kMenuTimerDelay = 500;
////////////////////////////////////////////////////////////////////////////////
//
// ButtonDropDown - constructors, destructors, initialization, cleanup
//
////////////////////////////////////////////////////////////////////////////////
ButtonDropDown::ButtonDropDown(Menu::Delegate* menu_delegate)
: Button(),
menu_delegate_(menu_delegate),
y_position_on_lbuttondown_(0),
show_menu_factory_(this) {
}
ButtonDropDown::~ButtonDropDown() {
}
////////////////////////////////////////////////////////////////////////////////
//
// ButtonDropDown - Events
//
////////////////////////////////////////////////////////////////////////////////
bool ButtonDropDown::OnMousePressed(const ChromeViews::MouseEvent& e) {
if (IsEnabled() && e.IsLeftMouseButton() && HitTest(WTL::CPoint(e.GetX(), e.GetY()))) {
// Store the y pos of the mouse coordinates so we can use them later to
// determine if the user dragged the mouse down (which should pop up the
// drag down menu immediately, instead of waiting for the timer)
y_position_on_lbuttondown_ = e.GetY();
// Schedule a task that will show the menu.
MessageLoop::current()->PostDelayedTask(FROM_HERE,
show_menu_factory_.NewRunnableMethod(&ButtonDropDown::ShowDropDownMenu,
GetViewContainer()->GetHWND()),
kMenuTimerDelay);
}
return Button::OnMousePressed(e);
}
void ButtonDropDown::OnMouseReleased(const ChromeViews::MouseEvent& e,
bool canceled) {
Button::OnMouseReleased(e, canceled);
if (canceled)
return;
if (e.IsLeftMouseButton())
show_menu_factory_.RevokeAll();
if (IsEnabled() && e.IsRightMouseButton() && HitTest(WTL::CPoint(e.GetX(), e.GetY()))) {
show_menu_factory_.RevokeAll();
// Make the button look depressed while the menu is open.
// NOTE: SetState() schedules a paint, but it won't occur until after the
// context menu message loop has terminated, so we PaintNow() to
// update the appearance synchronously.
SetState(BS_PUSHED);
PaintNow();
ShowDropDownMenu(GetViewContainer()->GetHWND());
}
}
bool ButtonDropDown::OnMouseDragged(const ChromeViews::MouseEvent& e) {
bool result = Button::OnMouseDragged(e);
if (!show_menu_factory_.empty()) {
// SM_CYDRAG is a pixel value for minimum dragging distance before operation
// counts as a drag, and not just as a click and accidental move of a mouse.
// See http://msdn2.microsoft.com/en-us/library/ms724385.aspx for details.
int dragging_threshold = GetSystemMetrics(SM_CYDRAG);
// If the mouse is dragged to a y position lower than where it was when
// clicked then we should not wait for the menu to appear but show
// it immediately.
if (e.GetY() > y_position_on_lbuttondown_ + dragging_threshold) {
show_menu_factory_.RevokeAll();
ShowDropDownMenu(GetViewContainer()->GetHWND());
}
}
return result;
}
////////////////////////////////////////////////////////////////////////////////
//
// ButtonDropDown - Menu functions
//
////////////////////////////////////////////////////////////////////////////////
void ButtonDropDown::ShowDropDownMenu(HWND window) {
if (menu_delegate_) {
CRect lb;
GetLocalBounds(&lb, true);
// Both the menu position and the menu anchor type change if the UI layout
// is right-to-left.
CPoint menu_position = CPoint(lb.TopLeft());
menu_position.Offset(0, lb.Height() - 1);
if (UILayoutIsRightToLeft())
menu_position.Offset(lb.Width() - 1, 0);
Menu::AnchorPoint anchor = Menu::TOPLEFT;
if (UILayoutIsRightToLeft())
anchor = Menu::TOPRIGHT;
View::ConvertPointToScreen(this, &menu_position);
Menu menu(menu_delegate_, anchor, window);
// ID's for AppendMenu is 1-based because RunMenu will ignore the user
// selection if id=0 is selected (0 = NO-OP) so we add 1 here and subtract 1
// in the handlers above to get the actual index
int item_count = menu_delegate_->GetItemCount();
for (int i = 0; i < item_count; i++) {
if (menu_delegate_->IsItemSeparator(i + 1)) {
menu.AppendSeparator();
} else {
if (menu_delegate_->HasIcon(i + 1))
menu.AppendMenuItemWithIcon(i + 1, L"", SkBitmap());
else
menu.AppendMenuItem(i+1, L"", Menu::NORMAL);
}
}
menu.RunMenuAt(menu_position.x, menu_position.y);
// Need to explicitly clear mouse handler so that events get sent
// properly after the menu finishes running. If we don't do this, then
// the first click to other parts of the UI is eaten.
SetMouseHandler(NULL);
}
}
////////////////////////////////////////////////////////////////////////////////
//
// ButtonDropDown - Accessibility
//
////////////////////////////////////////////////////////////////////////////////
bool ButtonDropDown::GetAccessibleDefaultAction(std::wstring* action) {
DCHECK(action);
action->assign(l10n_util::GetString(IDS_ACCACTION_PRESS));
return true;
}
bool ButtonDropDown::GetAccessibleRole(VARIANT* role) {
DCHECK(role);
role->vt = VT_I4;
role->lVal = ROLE_SYSTEM_BUTTONDROPDOWN;
return true;
}
bool ButtonDropDown::GetAccessibleState(VARIANT* state) {
DCHECK(state);
state->lVal |= STATE_SYSTEM_HASPOPUP;
return true;
}
} // namespace ChromeViews
|
