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// Copyright (c) 2011 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.
#ifndef CHROME_BROWSER_UI_GTK_CUSTOM_DRAG_H_
#define CHROME_BROWSER_UI_GTK_CUSTOM_DRAG_H_
#include <gtk/gtk.h>
#include <vector>
#include "base/basictypes.h"
#include "base/compiler_specific.h"
#include "base/memory/scoped_ptr.h"
#include "ui/base/gtk/gtk_signal.h"
class BookmarkNode;
class Profile;
namespace content {
class DownloadItem;
}
namespace gfx {
class Image;
}
// Base class for programatically generated drags.
class CustomDrag {
protected:
CustomDrag(gfx::Image* icon, int code_mask, GdkDragAction action);
virtual ~CustomDrag();
virtual void OnDragDataGet(GtkWidget* widget, GdkDragContext* context,
GtkSelectionData* selection_data,
guint target_type, guint time) = 0;
private:
CHROMEGTK_CALLBACK_1(CustomDrag, void, OnDragBegin, GdkDragContext*);
CHROMEGTK_CALLBACK_1(CustomDrag, void, OnDragEnd, GdkDragContext*);
// Since this uses a virtual function, we can't use a macro.
static void OnDragDataGetThunk(GtkWidget* widget, GdkDragContext* context,
GtkSelectionData* selection_data,
guint target_type, guint time,
CustomDrag* custom_drag) {
return custom_drag->OnDragDataGet(widget, context, selection_data,
target_type, time);
}
// Can't use a OwnedWidgetGtk because the initialization of GtkInvisible
// sinks the reference.
GtkWidget* drag_widget_;
// The image for the drag. The lifetime of the image should be managed outside
// this object. Most icons are owned by the IconManager.
gfx::Image* image_;
DISALLOW_COPY_AND_ASSIGN(CustomDrag);
};
// Encapsulates functionality for drags of download items.
class DownloadItemDrag : public CustomDrag {
public:
// Sets |widget| as a source for drags pertaining to |item|. No
// DownloadItemDrag object is created.
// It is safe to call this multiple times with different values of |icon|.
static void SetSource(GtkWidget* widget,
const content::DownloadItem* item,
gfx::Image* icon);
// Creates a new DownloadItemDrag, the lifetime of which is tied to the
// system drag.
static void BeginDrag(const content::DownloadItem* item, gfx::Image* icon);
private:
class DragData;
DownloadItemDrag(const content::DownloadItem* item, gfx::Image* icon);
virtual ~DownloadItemDrag();
virtual void OnDragDataGet(GtkWidget* widget, GdkDragContext* context,
GtkSelectionData* selection_data,
guint target_type, guint time) OVERRIDE;
scoped_ptr<DragData> drag_data_;
DISALLOW_COPY_AND_ASSIGN(DownloadItemDrag);
};
// Encapsulates functionality for drags of one or more bookmarks.
class BookmarkDrag : public CustomDrag {
public:
// Creates a new BookmarkDrag, the lifetime of which is tied to the
// system drag.
static void BeginDrag(Profile* profile,
const std::vector<const BookmarkNode*>& nodes);
private:
BookmarkDrag(Profile* profile,
const std::vector<const BookmarkNode*>& nodes);
virtual ~BookmarkDrag();
virtual void OnDragDataGet(GtkWidget* widget, GdkDragContext* context,
GtkSelectionData* selection_data,
guint target_type, guint time) OVERRIDE;
Profile* profile_;
std::vector<const BookmarkNode*> nodes_;
DISALLOW_COPY_AND_ASSIGN(BookmarkDrag);
};
#endif // CHROME_BROWSER_UI_GTK_CUSTOM_DRAG_H_
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