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
|
// Copyright 2012 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "ui/views/button_drag_utils.h"
#include <memory>
#include <utility>
#include "base/memory/raw_ptr.h"
#include "base/strings/utf_string_conversions.h"
#include "ui/base/dragdrop/os_exchange_data.h"
#include "ui/base/models/image_model.h"
#include "ui/base/resource/resource_bundle.h"
#include "ui/color/color_id.h"
#include "ui/color/color_provider.h"
#include "ui/compositor/canvas_painter.h"
#include "ui/compositor/compositor.h"
#include "ui/gfx/canvas.h"
#include "ui/gfx/geometry/point.h"
#include "ui/gfx/geometry/vector2d.h"
#include "ui/gfx/image/image.h"
#include "ui/resources/grit/ui_resources.h"
#include "ui/views/background.h"
#include "ui/views/border.h"
#include "ui/views/controls/button/label_button.h"
#include "ui/views/controls/button/label_button_border.h"
#include "ui/views/drag_utils.h"
#include "ui/views/paint_info.h"
#include "ui/views/widget/widget.h"
#include "url/gurl.h"
namespace button_drag_utils {
// Maximum width of the link drag image in pixels.
static constexpr int kLinkDragImageMaxWidth = 150;
class ScopedWidget {
public:
explicit ScopedWidget(views::Widget* widget) : widget_(widget) {}
ScopedWidget(const ScopedWidget&) = delete;
ScopedWidget& operator=(const ScopedWidget&) = delete;
~ScopedWidget() {
if (widget_)
widget_->CloseNow();
}
views::Widget* operator->() const { return widget_; }
views::Widget* get() const { return widget_; }
private:
raw_ptr<views::Widget> widget_;
};
void SetURLAndDragImage(const GURL& url,
const std::u16string& title,
const gfx::ImageSkia& icon,
const gfx::Point* press_pt,
ui::OSExchangeData* data) {
DCHECK(url.is_valid());
DCHECK(data);
data->SetURL(url, title);
SetDragImage(url, title, icon, press_pt, data);
}
void SetDragImage(const GURL& url,
const std::u16string& title,
const gfx::ImageSkia& icon,
const gfx::Point* press_pt,
ui::OSExchangeData* data) {
// Create a widget to render the drag image for us.
ScopedWidget drag_widget(new views::Widget());
views::Widget::InitParams params(views::Widget::InitParams::TYPE_DRAG);
params.accept_events = false;
params.ownership = views::Widget::InitParams::NATIVE_WIDGET_OWNS_WIDGET;
params.shadow_type = views::Widget::InitParams::ShadowType::kNone;
params.opacity = views::Widget::InitParams::WindowOpacity::kTranslucent;
drag_widget->Init(std::move(params));
// Create a button to render the drag image for us.
views::LabelButton* button =
drag_widget->SetContentsView(std::make_unique<views::LabelButton>(
views::Button::PressedCallback(),
title.empty() ? base::UTF8ToUTF16(url.spec()) : title));
button->SetTextSubpixelRenderingEnabled(false);
const ui::ColorProvider* color_provider = drag_widget->GetColorProvider();
button->SetTextColor(views::Button::STATE_NORMAL,
color_provider->GetColor(ui::kColorTextfieldForeground));
SkColor bg_color = color_provider->GetColor(ui::kColorTextfieldBackground);
if (drag_widget->IsTranslucentWindowOpacitySupported()) {
button->SetTextShadows(gfx::ShadowValues(
10, gfx::ShadowValue(gfx::Vector2d(0, 0), 2.0f, bg_color)));
} else {
button->SetBackground(views::CreateSolidBackground(bg_color));
button->SetBorder(button->CreateDefaultBorder());
}
button->SetMaxSize(gfx::Size(kLinkDragImageMaxWidth, 0));
if (icon.isNull()) {
button->SetImageModel(views::Button::STATE_NORMAL,
ui::ImageModel::FromResourceId(IDR_DEFAULT_FAVICON));
} else {
button->SetImageModel(views::Button::STATE_NORMAL,
ui::ImageModel::FromImageSkia(icon));
}
gfx::Size size(button->GetPreferredSize());
// drag_widget's size must be set to show the drag image in RTL.
// However, on Windows, calling Widget::SetSize() resets
// the LabelButton's bounds via OnNativeWidgetSizeChanged().
// Therefore, call button->SetBoundsRect() after drag_widget->SetSize().
drag_widget->SetSize(size);
button->SetBoundsRect(gfx::Rect(size));
gfx::Vector2d press_point;
if (press_pt)
press_point = press_pt->OffsetFromOrigin();
else
press_point = gfx::Vector2d(size.width() / 2, size.height() / 2);
SkBitmap bitmap;
float raster_scale = ScaleFactorForDragFromWidget(drag_widget.get());
SkColor color = SK_ColorTRANSPARENT;
button->Paint(views::PaintInfo::CreateRootPaintInfo(
ui::CanvasPainter(&bitmap, size, raster_scale, color,
true /* is_pixel_canvas */)
.context(),
size));
gfx::ImageSkia image = gfx::ImageSkia::CreateFromBitmap(bitmap, raster_scale);
data->provider().SetDragImage(image, press_point);
}
} // namespace button_drag_utils
|
