widgetdata.h

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// -*- C++ -*-

/*
 * GChemPaint library
 * widgetdata.h
 *
 * Copyright (C) 2002-2012 Jean Bréfort <jean.brefort@normalesup.org>
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation; either version 3 of the
 * License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301
 * USA
 */

#ifndef GCHEMPAINT_WIDGET_DATA_H
#define GCHEMPAINT_WIDGET_DATA_H

#include <gcu/object.h>
#include <gccv/structs.h>
#include <map>
#include <set>

namespace gcp {

class Application;
class View;

extern guint ClipboardDataType, ClipboardDataType1;
        extern xmlChar* ClipboardData;
extern char* ClipboardTextData;
void on_receive_targets (GtkClipboard *clipboard, GtkSelectionData *selection_data, Application *App);
void on_clear_data (GtkClipboard *clipboard, gcu::Object *obj);

enum SelectionState
{
        SelStateUnselected = 0,
        SelStateSelected,
        SelStateUpdating,
        SelStateErasing
};

class WidgetData
{
public:
        View* m_View;
        GtkWidget *Canvas;
        double Zoom;
//      std::map<gcu::Object const*, GnomeCanvasGroup*>Items;
        std::set < gcu::Object * >SelectedObjects;

        bool IsSelected (gcu::Object const *obj) const;

        bool ChildrenSelected (gcu::Object const *obj) const;


        gcu::Object *GetSelectedAncestor (gcu::Object *obj);

        void SetSelected (gcu::Object *obj, int state = gcp::SelStateSelected);
        void Unselect (gcu::Object *obj);
        void UnselectAll ();
        void MoveSelectedItems (double dx, double dy);
        void MoveSelection (double dx, double dy);
        void RotateSelection (double x, double y, double angle);
        void ClearSelection () {SelectedObjects.clear();}
        void Copy (GtkClipboard* clipboard);
        void GetSelectionBounds (gccv::Rect &rect) const;
        bool HasSelection () {return !(SelectedObjects.empty());}
        void SelectAll ();
        static xmlDocPtr GetXmlDoc (GtkClipboard* clipboard);
        void ShowSelection (bool state);
        void GetObjectBounds (gcu::Object const *obj, gccv::Rect *rect) const;
        void GetObjectsBounds (std::set <gcu::Object const *> const &objects, gccv::Rect *rect) const;
        void GetObjectsBounds (std::set <gcu::Object *> const &objects, gccv::Rect *rect) const;
        void GetObjectBounds (gcu::Object const* obj, gccv::Rect &rect) const;

        void SimplifySelection ();

private:
        void MoveItems (gcu::Object *obj, double dx, double dy);
};

}       // namespace gcp

#endif //GCHEMPAINT_WIDGET_DATA_H