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| 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 | |
| 20 namespace button_drag_utils { | |
| 21 | |
| 22 // Maximum width of the link drag image in pixels. | |
| 23 static const int kLinkDragImageMaxWidth = 150; | |
| 24 | |
| 25 void 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 | |
| 36 void 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 | |
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