/* This file is part of the KDE project
   Copyright (C) 2004 Cedric Pasteur <cedric.pasteur@free.fr>

   This library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Library General Public
   License as published by the Free Software Foundation; either
   version 2 of the License, or (at your option) any later version.

   This library 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
   Library General Public License for more details.

   You should have received a copy of the GNU Library General Public License
   along with this library; see the file COPYING.LIB.  If not, write to
   the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
   Boston, MA 02111-1307, USA.
*/

#ifndef KFORMDESIGNER_PART_H
#define KFORMDESIGNER_PART_H

#include <qwidget.h>
#include <qpixmap.h>

#include <kparts/part.h>
#include <kparts/factory.h>

#include "form.h"

class KAboutData;
class KInstance;
class QWorkspace;
class QCloseEvent;

using KFormDesigner::Form;

class KFORMEDITOR_EXPORT KFDFactory : public KParts::Factory
{
	Q_OBJECT

	public:
		KFDFactory();
		virtual ~KFDFactory();

		virtual KParts::Part* createPartObject(QWidget *parentWidget=0, const char *widgetName=0, QObject *parent=0, const char *name=0,
		  const char *classname="KParts::Part", const QStringList &args=QStringList());

		static KInstance *instance();
		static KAboutData *aboutData();

	private:
		static KInstance *m_instance;
};

class KFORMEDITOR_EXPORT KFormDesignerPart: public KParts::ReadWritePart
{
	Q_OBJECT

	public:
		KFormDesignerPart(QWidget *parent, const char *name, bool readOnly=true, const QStringList &args=QStringList());
		virtual ~KFormDesignerPart();

		KFormDesigner::FormManager*   manager()  { return m_manager; }
		void      setUniqueFormMode(bool enable)  { m_uniqueFormMode = enable; }

		bool   closeForm(Form *form);
		bool   closeForms();

		virtual bool closeURL();

	public slots:
		/*! Creates a new blank Form. The new Form is shown and become the active Form. */
		void createBlankForm();
		/*! Loads a Form from a UI file. A "Open File" dialog is shown to select the file. The loaded Form is shown and becomes
		   the active Form. */
		void open();
		void slotPreviewForm();
		void saveAs();
		//void slotCreateFormSlot(Form *form, const QString &widget, const QString &signal);

	protected slots:
		void slotWidgetSelected(Form *form, bool multiple);
		void slotFormWidgetSelected(Form *form);
		void slotNoFormSelected();
		void slotFormModified(KFormDesigner::Form *form, bool isDirty);
		void setUndoEnabled(bool enabled, const QString &text);
		void setRedoEnabled(bool enabled, const QString &text);

	protected:
		virtual bool openFile();
		virtual bool saveFile();
		void disableWidgetActions();
		void enableFormActions();
		void setupActions();

	private:
		KFormDesigner::FormManager  *m_manager;
		QWorkspace  *m_workspace;
		int  m_count;
		bool   m_uniqueFormMode;
		bool   m_openingFile;
		bool   m_inShell;
};

//! Helper: this widget is used to create form's surface
class KFORMEDITOR_EXPORT FormWidgetBase : public QWidget, public KFormDesigner::FormWidget
{
	Q_OBJECT

	public:
		FormWidgetBase(KFormDesignerPart *part, QWidget *parent = 0, const char *name = 0, int WFlags = WDestructiveClose)
		: QWidget(parent, name, WFlags), m_part(part) {}
		~FormWidgetBase() {;}

		void drawRect(const QRect& r, int type);
		void initBuffer();
		void clearForm();
		void highlightWidgets(QWidget *from, QWidget *to);//, const QPoint &p);

	protected:
		void closeEvent(QCloseEvent *ev);

	private:
		QPixmap buffer; //!< stores grabbed entire form's area for redraw
		QRect prev_rect; //!< previously selected rectangle
		KFormDesignerPart  *m_part;
};

#endif

