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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 "base/strings/utf_string_conversions.h"
#include "ui/base/dragdrop/drag_utils.h"
#include "ui/base/dragdrop/os_exchange_data.h"
#include "ui/base/resource/resource_bundle.h"
#include "ui/compositor/canvas_painter.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/controls/button/label_button.h"
#include "ui/views/drag_utils.h"
#include "ui/views/resources/grit/views_resources.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 const int kLinkDragImageMaxWidth = 150;
void SetURLAndDragImage(const GURL& url,
const base::string16& title,
const gfx::ImageSkia& icon,
const gfx::Point* press_pt,
ui::OSExchangeData* data,
views::Widget* widget) {
DCHECK(url.is_valid() && data);
data->SetURL(url, title);
SetDragImage(url, title, icon, press_pt, data, widget);
}
void SetDragImage(const GURL& url,
const base::string16& title,
const gfx::ImageSkia& icon,
const gfx::Point* press_pt,
ui::OSExchangeData* data,
views::Widget* widget) {
// Create a button to render the drag image for us.
views::LabelButton button(NULL,
title.empty() ? base::UTF8ToUTF16(url.spec())
: title);
button.SetTextSubpixelRenderingEnabled(false);
const ui::NativeTheme* theme =
widget ? widget->GetNativeTheme() : ui::NativeTheme::instance();
button.SetTextColor(views::Button::STATE_NORMAL,
theme->GetSystemColor(ui::NativeTheme::kColorId_LabelEnabledColor));
gfx::ShadowValues shadows(
10,
gfx::ShadowValue(gfx::Vector2d(0, 0), 1.0f,
theme->GetSystemColor(
ui::NativeTheme::kColorId_LabelBackgroundColor)));
button.SetTextShadows(shadows);
button.SetMaxSize(gfx::Size(kLinkDragImageMaxWidth, 0));
if (icon.isNull()) {
button.SetImage(views::Button::STATE_NORMAL,
*ui::ResourceBundle::GetSharedInstance().GetImageNamed(
IDR_DEFAULT_FAVICON).ToImageSkia());
} else {
button.SetImage(views::Button::STATE_NORMAL, icon);
}
gfx::Size prefsize = button.GetPreferredSize();
button.SetBounds(0, 0, prefsize.width(), prefsize.height());
gfx::Vector2d press_point;
if (press_pt)
press_point = press_pt->OffsetFromOrigin();
else
press_point = gfx::Vector2d(prefsize.width() / 2, prefsize.height() / 2);
// Render the image.
scoped_ptr<gfx::Canvas> canvas(
views::GetCanvasForDragImage(widget, prefsize));
button.Paint(ui::CanvasPainter(canvas.get(), 1.f).context());
drag_utils::SetDragImageOnDataObject(*canvas, press_point, data);
}
} // namespace button_drag_utils
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