1 // Copyright (c) 2011 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 #ifndef CHROME_BROWSER_UI_GTK_TAB_CONTENTS_DRAG_SOURCE_H_ 6 #define CHROME_BROWSER_UI_GTK_TAB_CONTENTS_DRAG_SOURCE_H_ 7 #pragma once 8 9 #include <gtk/gtk.h> 10 11 #include "base/basictypes.h" 12 #include "base/file_path.h" 13 #include "base/message_loop.h" 14 #include "base/string16.h" 15 #include "googleurl/src/gurl.h" 16 #include "third_party/WebKit/Source/WebKit/chromium/public/WebDragOperation.h" 17 #include "ui/base/gtk/gtk_signal.h" 18 #include "ui/base/gtk/gtk_signal_registrar.h" 19 #include "ui/gfx/native_widget_types.h" 20 #include "ui/gfx/point.h" 21 22 class SkBitmap; 23 class TabContents; 24 class TabContentsView; 25 struct WebDropData; 26 27 // TabContentsDragSource takes care of managing the drag from a TabContents 28 // with Gtk. 29 class TabContentsDragSource : public MessageLoopForUI::Observer { 30 public: 31 explicit TabContentsDragSource(TabContentsView* tab_contents_view); 32 ~TabContentsDragSource(); 33 34 TabContents* tab_contents() const; 35 36 // Starts a drag for the tab contents this TabContentsDragSource was 37 // created for. 38 void StartDragging(const WebDropData& drop_data, 39 WebKit::WebDragOperationsMask allowed_ops, 40 GdkEventButton* last_mouse_down, 41 const SkBitmap& image, 42 const gfx::Point& image_offset); 43 44 // MessageLoop::Observer implementation: 45 virtual void WillProcessEvent(GdkEvent* event); 46 virtual void DidProcessEvent(GdkEvent* event); 47 48 private: 49 CHROMEGTK_CALLBACK_2(TabContentsDragSource, gboolean, OnDragFailed, 50 GdkDragContext*, GtkDragResult); 51 CHROMEGTK_CALLBACK_1(TabContentsDragSource, void, OnDragBegin, 52 GdkDragContext*); 53 CHROMEGTK_CALLBACK_1(TabContentsDragSource, void, OnDragEnd, 54 GdkDragContext*); 55 CHROMEGTK_CALLBACK_4(TabContentsDragSource, void, OnDragDataGet, 56 GdkDragContext*, GtkSelectionData*, guint, guint); 57 CHROMEGTK_CALLBACK_1(TabContentsDragSource, gboolean, OnDragIconExpose, 58 GdkEventExpose*); 59 60 gfx::NativeView GetContentNativeView() const; 61 62 // The view we're manging the drag for. 63 TabContentsView* tab_contents_view_; 64 65 // The drop data for the current drag (for drags that originate in the render 66 // view). Non-NULL iff there is a current drag. 67 scoped_ptr<WebDropData> drop_data_; 68 69 // The image used for depicting the drag, and the offset between the cursor 70 // and the top left pixel. 71 GdkPixbuf* drag_pixbuf_; 72 gfx::Point image_offset_; 73 74 // The mime type for the file contents of the current drag (if any). 75 GdkAtom drag_file_mime_type_; 76 77 // Whether the current drag has failed. Meaningless if we are not the source 78 // for a current drag. 79 bool drag_failed_; 80 81 // This is the widget we use to initiate drags. Since we don't use the 82 // renderer widget, we can persist drags even when our contents is switched 83 // out. We can't use an OwnedWidgetGtk because the GtkInvisible widget 84 // initialization code sinks the reference. 85 GtkWidget* drag_widget_; 86 87 // Context created once drag starts. A NULL value indicates that there is 88 // no drag currently in progress. 89 GdkDragContext* drag_context_; 90 91 // The file mime type for a drag-out download. 92 string16 wide_download_mime_type_; 93 94 // The file name to be saved to for a drag-out download. 95 FilePath download_file_name_; 96 97 // The URL to download from for a drag-out download. 98 GURL download_url_; 99 100 // The widget that provides visual feedback for the drag. We can't use 101 // an OwnedWidgetGtk because the GtkWindow initialization code sinks 102 // the reference. 103 GtkWidget* drag_icon_; 104 105 ui::GtkSignalRegistrar signals_; 106 107 DISALLOW_COPY_AND_ASSIGN(TabContentsDragSource); 108 }; 109 110 #endif // CHROME_BROWSER_UI_GTK_TAB_CONTENTS_DRAG_SOURCE_H_ 111