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
222
|
// Copyright (c) 2010 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 "chrome/browser/views/tabs/dragged_tab_view.h"
#include "chrome/browser/views/tabs/native_view_photobooth.h"
#include "gfx/canvas_skia.h"
#include "third_party/skia/include/core/SkShader.h"
#include "views/widget/widget.h"
#if defined(OS_WIN)
#include "views/widget/widget_win.h"
#elif defined(OS_LINUX)
#include "views/widget/widget_gtk.h"
#endif
static const int kTransparentAlpha = 200;
static const int kOpaqueAlpha = 255;
static const int kDragFrameBorderSize = 2;
static const int kTwiceDragFrameBorderSize = 2 * kDragFrameBorderSize;
static const float kScalingFactor = 0.5;
static const SkColor kDraggedTabBorderColor = SkColorSetRGB(103, 129, 162);
////////////////////////////////////////////////////////////////////////////////
// DraggedTabView, public:
DraggedTabView::DraggedTabView(views::View* renderer,
const gfx::Point& mouse_tab_offset,
const gfx::Size& contents_size,
const gfx::Size& min_size)
: renderer_(renderer),
show_contents_on_drag_(true),
mouse_tab_offset_(mouse_tab_offset),
tab_size_(min_size),
photobooth_(NULL),
contents_size_(contents_size) {
set_parent_owned(false);
#if defined(OS_WIN)
container_.reset(new views::WidgetWin);
container_->set_delete_on_destroy(false);
container_->set_window_style(WS_POPUP);
container_->set_window_ex_style(
WS_EX_LAYERED | WS_EX_TOPMOST | WS_EX_TOOLWINDOW);
container_->set_can_update_layered_window(false);
container_->Init(NULL, gfx::Rect(0, 0, 0, 0));
container_->SetContentsView(this);
BOOL drag;
if ((::SystemParametersInfo(SPI_GETDRAGFULLWINDOWS, 0, &drag, 0) != 0) &&
(drag == FALSE)) {
show_contents_on_drag_ = false;
}
#else
container_.reset(new views::WidgetGtk(views::WidgetGtk::TYPE_POPUP));
container_->MakeTransparent();
container_->set_delete_on_destroy(false);
container_->Init(NULL, gfx::Rect(0, 0, 0, 0));
container_->SetContentsView(this);
#endif
}
DraggedTabView::~DraggedTabView() {
GetParent()->RemoveChildView(this);
container_->CloseNow();
}
void DraggedTabView::MoveTo(const gfx::Point& screen_point) {
int x;
if (base::i18n::IsRTL()) {
// On RTL locales, a dragged tab (when it is not attached to a tab strip)
// is rendered using a right-to-left orientation so we should calculate the
// window position differently.
gfx::Size ps = GetPreferredSize();
x = screen_point.x() - ScaleValue(ps.width()) + mouse_tab_offset_.x() +
ScaleValue(
renderer_->MirroredXCoordinateInsideView(mouse_tab_offset_.x()));
} else {
x = screen_point.x() + mouse_tab_offset_.x() -
ScaleValue(mouse_tab_offset_.x());
}
int y = screen_point.y() + mouse_tab_offset_.y() -
ScaleValue(mouse_tab_offset_.y());
#if defined(OS_WIN)
int show_flags = container_->IsVisible() ? SWP_NOZORDER : SWP_SHOWWINDOW;
container_->SetWindowPos(HWND_TOP, x, y, 0, 0,
SWP_NOSIZE | SWP_NOACTIVATE | show_flags);
#else
gfx::Rect bounds;
container_->GetBounds(&bounds, true);
container_->SetBounds(gfx::Rect(x, y, bounds.width(), bounds.height()));
if (!container_->IsVisible())
container_->Show();
#endif
}
void DraggedTabView::SetTabWidthAndUpdate(int width,
NativeViewPhotobooth* photobooth) {
tab_size_.set_width(width);
photobooth_ = photobooth;
#if defined(OS_WIN)
container_->SetOpacity(kTransparentAlpha);
#endif
ResizeContainer();
Update();
}
void DraggedTabView::Update() {
#if defined(OS_WIN)
container_->set_can_update_layered_window(true);
SchedulePaint();
container_->PaintNow(gfx::Rect());
container_->set_can_update_layered_window(false);
#else
SchedulePaint();
#endif
}
///////////////////////////////////////////////////////////////////////////////
// DraggedTabView, views::View overrides:
void DraggedTabView::Paint(gfx::Canvas* canvas) {
if (show_contents_on_drag_)
PaintDetachedView(canvas);
else
PaintFocusRect(canvas);
}
void DraggedTabView::Layout() {
int left = 0;
if (base::i18n::IsRTL())
left = GetPreferredSize().width() - tab_size_.width();
// The renderer_'s width should be tab_size_.width() in both LTR and RTL
// locales. Wrong width will cause the wrong positioning of the tab view in
// dragging. Please refer to http://crbug.com/6223 for details.
renderer_->SetBounds(left, 0, tab_size_.width(), tab_size_.height());
}
gfx::Size DraggedTabView::GetPreferredSize() {
int width = std::max(tab_size_.width(), contents_size_.width()) +
kTwiceDragFrameBorderSize;
int height = tab_size_.height() + kDragFrameBorderSize +
contents_size_.height();
return gfx::Size(width, height);
}
////////////////////////////////////////////////////////////////////////////////
// DraggedTabView, private:
void DraggedTabView::PaintDetachedView(gfx::Canvas* canvas) {
gfx::Size ps = GetPreferredSize();
gfx::CanvasSkia scale_canvas(ps.width(), ps.height(), false);
SkBitmap& bitmap_device = const_cast<SkBitmap&>(
scale_canvas.getTopPlatformDevice().accessBitmap(true));
bitmap_device.eraseARGB(0, 0, 0, 0);
scale_canvas.FillRectInt(kDraggedTabBorderColor, 0,
tab_size_.height() - kDragFrameBorderSize,
ps.width(), ps.height() - tab_size_.height());
int image_x = kDragFrameBorderSize;
int image_y = tab_size_.height();
int image_w = ps.width() - kTwiceDragFrameBorderSize;
int image_h = contents_size_.height();
scale_canvas.FillRectInt(SK_ColorBLACK, image_x, image_y, image_w, image_h);
photobooth_->PaintScreenshotIntoCanvas(
&scale_canvas,
gfx::Rect(image_x, image_y, image_w, image_h));
renderer_->ProcessPaint(&scale_canvas);
SkIRect subset;
subset.set(0, 0, ps.width(), ps.height());
SkBitmap mipmap = scale_canvas.ExtractBitmap();
mipmap.buildMipMap(true);
SkShader* bitmap_shader =
SkShader::CreateBitmapShader(mipmap, SkShader::kClamp_TileMode,
SkShader::kClamp_TileMode);
SkMatrix shader_scale;
shader_scale.setScale(kScalingFactor, kScalingFactor);
bitmap_shader->setLocalMatrix(shader_scale);
SkPaint paint;
paint.setShader(bitmap_shader);
paint.setAntiAlias(true);
bitmap_shader->unref();
SkRect rc;
rc.fLeft = 0;
rc.fTop = 0;
rc.fRight = SkIntToScalar(ps.width());
rc.fBottom = SkIntToScalar(ps.height());
canvas->AsCanvasSkia()->drawRect(rc, paint);
}
void DraggedTabView::PaintFocusRect(gfx::Canvas* canvas) {
gfx::Size ps = GetPreferredSize();
canvas->DrawFocusRect(0, 0,
static_cast<int>(ps.width() * kScalingFactor),
static_cast<int>(ps.height() * kScalingFactor));
}
void DraggedTabView::ResizeContainer() {
gfx::Size ps = GetPreferredSize();
int w = ScaleValue(ps.width());
int h = ScaleValue(ps.height());
#if defined(OS_WIN)
SetWindowPos(container_->GetNativeView(), HWND_TOPMOST, 0, 0, w, h,
SWP_NOMOVE | SWP_NOZORDER | SWP_NOACTIVATE);
#else
gfx::Rect bounds;
container_->GetBounds(&bounds, true);
container_->SetBounds(gfx::Rect(bounds.x(), bounds.y(), w, h));
#endif
}
int DraggedTabView::ScaleValue(int value) {
return static_cast<int>(value * kScalingFactor);
}
|
