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
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
|
// Copyright 2013 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "ui/views/corewm/tooltip_aura.h"
#include "base/strings/string_split.h"
#include "base/strings/string_util.h"
#include "ui/aura/window.h"
#include "ui/aura/window_tree_host.h"
#include "ui/gfx/canvas.h"
#include "ui/gfx/render_text.h"
#include "ui/gfx/screen.h"
#include "ui/gfx/text_elider.h"
#include "ui/gfx/text_utils.h"
#include "ui/native_theme/native_theme.h"
#include "ui/views/background.h"
#include "ui/views/border.h"
#include "ui/views/view.h"
#include "ui/views/widget/widget.h"
namespace {
// Max visual tooltip width. If a tooltip is greater than this width, it will
// be wrapped.
const int kTooltipMaxWidthPixels = 400;
// FIXME: get cursor offset from actual cursor size.
const int kCursorOffsetX = 10;
const int kCursorOffsetY = 15;
// Creates a widget of type TYPE_TOOLTIP
views::Widget* CreateTooltipWidget(aura::Window* tooltip_window) {
views::Widget* widget = new views::Widget;
views::Widget::InitParams params;
// For aura, since we set the type to TYPE_TOOLTIP, the widget will get
// auto-parented to the right container.
params.type = views::Widget::InitParams::TYPE_TOOLTIP;
params.context = tooltip_window;
DCHECK(params.context);
params.keep_on_top = true;
params.accept_events = false;
widget->Init(params);
return widget;
}
} // namespace
namespace views {
namespace corewm {
// TODO(oshima): Consider to use views::Label.
class TooltipAura::TooltipView : public views::View {
public:
TooltipView()
: render_text_(gfx::RenderText::CreateInstance()),
max_width_(0) {
const int kHorizontalPadding = 3;
const int kVerticalPadding = 2;
SetBorder(Border::CreateEmptyBorder(
kVerticalPadding, kHorizontalPadding,
kVerticalPadding, kHorizontalPadding));
set_owned_by_client();
render_text_->SetWordWrapBehavior(gfx::WRAP_LONG_WORDS);
render_text_->SetMultiline(true);
ResetDisplayRect();
}
~TooltipView() override {}
// views:View:
void OnPaint(gfx::Canvas* canvas) override {
OnPaintBackground(canvas);
gfx::Size text_size = size();
gfx::Insets insets = border()->GetInsets();
text_size.Enlarge(-insets.width(), -insets.height());
render_text_->SetDisplayRect(gfx::Rect(text_size));
canvas->Save();
canvas->Translate(gfx::Vector2d(insets.left(), insets.top()));
render_text_->Draw(canvas);
canvas->Restore();
OnPaintBorder(canvas);
}
gfx::Size GetPreferredSize() const override {
gfx::Size view_size = render_text_->GetStringSize();
gfx::Insets insets = border()->GetInsets();
view_size.Enlarge(insets.width(), insets.height());
return view_size;
}
const char* GetClassName() const override {
return "TooltipView";
}
void SetText(const base::string16& text) {
render_text_->SetHorizontalAlignment(gfx::ALIGN_TO_HEAD);
render_text_->SetText(text);
}
void SetForegroundColor(SkColor color) {
render_text_->SetColor(color);
}
void SetMaxWidth(int width) {
max_width_ = width;
ResetDisplayRect();
}
private:
void ResetDisplayRect() {
gfx::Insets insets = border()->GetInsets();
int max_text_width = max_width_ - insets.width();
render_text_->SetDisplayRect(gfx::Rect(0, 0, max_text_width, 100000));
}
scoped_ptr<gfx::RenderText> render_text_;
int max_width_;
DISALLOW_COPY_AND_ASSIGN(TooltipView);
};
TooltipAura::TooltipAura()
: tooltip_view_(new TooltipView),
widget_(NULL),
tooltip_window_(NULL) {
}
TooltipAura::~TooltipAura() {
DestroyWidget();
}
void TooltipAura::SetTooltipBounds(const gfx::Point& mouse_pos,
const gfx::Size& tooltip_size) {
gfx::Rect tooltip_rect(mouse_pos, tooltip_size);
tooltip_rect.Offset(kCursorOffsetX, kCursorOffsetY);
gfx::Screen* screen = gfx::Screen::GetScreenFor(tooltip_window_);
gfx::Rect display_bounds(screen->GetDisplayNearestPoint(mouse_pos).bounds());
// If tooltip is out of bounds on the x axis, we simply shift it
// horizontally by the offset.
if (tooltip_rect.right() > display_bounds.right()) {
int h_offset = tooltip_rect.right() - display_bounds.right();
tooltip_rect.Offset(-h_offset, 0);
}
// If tooltip is out of bounds on the y axis, we flip it to appear above the
// mouse cursor instead of below.
if (tooltip_rect.bottom() > display_bounds.bottom())
tooltip_rect.set_y(mouse_pos.y() - tooltip_size.height());
tooltip_rect.AdjustToFit(display_bounds);
widget_->SetBounds(tooltip_rect);
}
void TooltipAura::DestroyWidget() {
if (widget_) {
widget_->RemoveObserver(this);
widget_->Close();
widget_ = NULL;
}
}
int TooltipAura::GetMaxWidth(const gfx::Point& location,
aura::Window* context) const {
gfx::Screen* screen = gfx::Screen::GetScreenFor(context);
gfx::Rect display_bounds(screen->GetDisplayNearestPoint(location).bounds());
return std::min(kTooltipMaxWidthPixels, (display_bounds.width() + 1) / 2);
}
void TooltipAura::SetText(aura::Window* window,
const base::string16& tooltip_text,
const gfx::Point& location) {
tooltip_window_ = window;
tooltip_view_->SetMaxWidth(GetMaxWidth(location, window));
tooltip_view_->SetText(tooltip_text);
if (!widget_) {
widget_ = CreateTooltipWidget(tooltip_window_);
widget_->SetContentsView(tooltip_view_.get());
widget_->AddObserver(this);
}
SetTooltipBounds(location, tooltip_view_->GetPreferredSize());
ui::NativeTheme* native_theme = widget_->GetNativeTheme();
tooltip_view_->set_background(
views::Background::CreateSolidBackground(
native_theme->GetSystemColor(
ui::NativeTheme::kColorId_TooltipBackground)));
tooltip_view_->SetForegroundColor(native_theme->GetSystemColor(
ui::NativeTheme::kColorId_TooltipText));
}
void TooltipAura::Show() {
if (widget_) {
widget_->Show();
widget_->StackAtTop();
}
}
void TooltipAura::Hide() {
tooltip_window_ = NULL;
if (widget_)
widget_->Hide();
}
bool TooltipAura::IsVisible() {
return widget_ && widget_->IsVisible();
}
void TooltipAura::OnWidgetDestroying(views::Widget* widget) {
DCHECK_EQ(widget_, widget);
widget_ = NULL;
tooltip_window_ = NULL;
}
} // namespace corewm
} // namespace views
|
