/*
 * Copyright (C) 2004-2012 Geometer Plus <contact@geometerplus.com>
 *
 * 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 2 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 Street, Fifth Floor, Boston, MA
 * 02110-1301, USA.
 */

#ifndef __ZLTQTVIEWWIDGET_H__
#define __ZLTQTVIEWWIDGET_H__

#include <tqwidget.h>

#include "ZLViewWidget.h"
#include <ZLApplication.h>

class ZLTQtApplicationWindow;
class TQFrame;
class TQScrollBar;
class TQGridLayout;

class ZLTQtViewWidgetPositionInfo {

public:
	ZLTQtViewWidgetPositionInfo(const ZLTQtApplicationWindow &window);

	int x() const;
	int y() const;
	int width() const;
	int height() const;

private:
	const ZLTQtApplicationWindow &myWindow;
};

class ZLTQtViewWidget : public TQObject, public ZLViewWidget {
	TQ_OBJECT

private:
	class ZLTQtViewWidgetInternal : public TQWidget {

	public:
		ZLTQtViewWidgetInternal(TQWidget *parent, ZLTQtViewWidget &holder);

	private:
		void paintEvent(TQPaintEvent *event);
		void mousePressEvent(TQMouseEvent *event);
		void mouseReleaseEvent(TQMouseEvent *event);
		void mouseMoveEvent(TQMouseEvent *event);
		void resizeEvent(TQResizeEvent *event);

		int x(const TQMouseEvent *event) const;
		int y(const TQMouseEvent *event) const;

	private:
		ZLTQtViewWidget &myHolder;
	};
	
public:
	ZLTQtViewWidget(TQWidget *parent, ZLApplication *application, const ZLTQtViewWidgetPositionInfo &positionInfo);
	TQWidget *widget() const;
	const ZLTQtViewWidgetPositionInfo &positionInfo() const;

private:
	void repaint();
	void trackStylus(bool track);

	void setScrollbarEnabled(ZLView::Direction direction, bool enabled);
	void setScrollbarPlacement(ZLView::Direction direction, bool standard);
	void setScrollbarParameters(ZLView::Direction direction, size_t full, size_t from, size_t to);

	TQScrollBar *addScrollBar(TQGridLayout *layout, TQt::Orientation orientation, int x, int y);
	TQScrollBar *verticalScrollBar();
	TQScrollBar *horizontalScrollBar();

private slots:
	void onVerticalSliderMoved(int value);
	void onVerticalSliderStepNext();
	void onVerticalSliderPageNext();
	void onVerticalSliderStepPrevious();
	void onVerticalSliderPagePrevious();
	void onHorizontalSliderMoved(int value);
	void onHorizontalSliderStepNext();
	void onHorizontalSliderPageNext();
	void onHorizontalSliderStepPrevious();
	void onHorizontalSliderPagePrevious();

private:
	ZLTQtViewWidgetInternal *myTQWidget;
	TQFrame *myFrame;

	TQScrollBar *myRightScrollBar;
	TQScrollBar *myLeftScrollBar;
	bool myShowScrollBarAtRight;

	TQScrollBar *myBottomScrollBar;
	TQScrollBar *myTopScrollBar;
	bool myShowScrollBarAtBottom;

	ZLApplication *myApplication;
	const ZLTQtViewWidgetPositionInfo myPositionInfo;
};

#endif /* __ZLTQTVIEWWIDGET_H__ */
