1// Copyright (c) 2012 The Chromium Authors. All rights reserved. 2// Use of this source code is governed by a BSD-style license that can be 3// found in the LICENSE file. 4 5#include "ui/views/button_drag_utils.h" 6 7#include "base/strings/utf_string_conversions.h" 8#include "ui/base/dragdrop/drag_utils.h" 9#include "ui/base/dragdrop/os_exchange_data.h" 10#include "ui/base/resource/resource_bundle.h" 11#include "ui/gfx/canvas.h" 12#include "ui/gfx/geometry/point.h" 13#include "ui/gfx/image/image.h" 14#include "ui/resources/grit/ui_resources.h" 15#include "ui/views/controls/button/label_button.h" 16#include "ui/views/drag_utils.h" 17#include "ui/views/widget/widget.h" 18#include "url/gurl.h" 19 20namespace button_drag_utils { 21 22// Maximum width of the link drag image in pixels. 23static const int kLinkDragImageMaxWidth = 150; 24 25void SetURLAndDragImage(const GURL& url, 26 const base::string16& title, 27 const gfx::ImageSkia& icon, 28 const gfx::Point* press_pt, 29 ui::OSExchangeData* data, 30 views::Widget* widget) { 31 DCHECK(url.is_valid() && data); 32 data->SetURL(url, title); 33 SetDragImage(url, title, icon, press_pt, data, widget); 34} 35 36void SetDragImage(const GURL& url, 37 const base::string16& title, 38 const gfx::ImageSkia& icon, 39 const gfx::Point* press_pt, 40 ui::OSExchangeData* data, 41 views::Widget* widget) { 42 // Create a button to render the drag image for us. 43 views::LabelButton button(NULL, 44 title.empty() ? base::UTF8ToUTF16(url.spec()) 45 : title); 46 button.SetTextSubpixelRenderingEnabled(false); 47 const ui::NativeTheme* theme = 48 widget ? widget->GetNativeTheme() : ui::NativeTheme::instance(); 49 button.SetTextColor(views::Button::STATE_NORMAL, 50 theme->GetSystemColor(ui::NativeTheme::kColorId_LabelEnabledColor)); 51 gfx::ShadowValues shadows(10, gfx::ShadowValue(gfx::Point(0,0), 1.0f, 52 theme->GetSystemColor(ui::NativeTheme::kColorId_LabelBackgroundColor))); 53 button.SetTextShadows(shadows); 54 button.SetMaxSize(gfx::Size(kLinkDragImageMaxWidth, 0)); 55 if (icon.isNull()) { 56 button.SetImage(views::Button::STATE_NORMAL, 57 *ui::ResourceBundle::GetSharedInstance().GetImageNamed( 58 IDR_DEFAULT_FAVICON).ToImageSkia()); 59 } else { 60 button.SetImage(views::Button::STATE_NORMAL, icon); 61 } 62 gfx::Size prefsize = button.GetPreferredSize(); 63 button.SetBounds(0, 0, prefsize.width(), prefsize.height()); 64 65 gfx::Vector2d press_point; 66 if (press_pt) 67 press_point = press_pt->OffsetFromOrigin(); 68 else 69 press_point = gfx::Vector2d(prefsize.width() / 2, prefsize.height() / 2); 70 71 // Render the image. 72 scoped_ptr<gfx::Canvas> canvas( 73 views::GetCanvasForDragImage(widget, prefsize)); 74 button.Paint(canvas.get(), views::CullSet()); 75 drag_utils::SetDragImageOnDataObject(*canvas, press_point, data); 76} 77 78} // namespace button_drag_utils 79