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- // Copyright (c) 2012 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/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
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