/* ScummVM - Graphic Adventure Engine
 *
 * ScummVM is the legal property of its developers, whose names
 * are too numerous to list here. Please refer to the COPYRIGHT
 * file distributed with this source distribution.
 *
 * 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.
 *
 */

#include "common/util.h"
#include "gui/widgets/scrollcontainer.h"
#include "gui/gui-manager.h"

#include "gui/ThemeEval.h"

namespace GUI {

ScrollContainerWidget::ScrollContainerWidget(GuiObject *boss, int x, int y, int w, int h)
	: Widget(boss, x, y, w, h) {
	init();
}

ScrollContainerWidget::ScrollContainerWidget(GuiObject *boss, const Common::String &name)
	: Widget(boss, name) {
	init();
}

void ScrollContainerWidget::init() {
	setFlags(WIDGET_ENABLED);
	_type = kScrollContainerWidget;
	_verticalScroll = new ScrollBarWidget(this, _w-16, 0, 16, _h);
	_verticalScroll->setTarget(this);
	_scrolledX = 0;
	_scrolledY = 0;
	_limitH = 140;
	recalc();
}

void ScrollContainerWidget::recalc() {
	_verticalScroll->_numEntries = _h;
	_verticalScroll->_currentPos = _scrolledY;
	_verticalScroll->_entriesPerPage = _limitH;
	_verticalScroll->setPos(_w - 16, _scrolledY);
	_verticalScroll->setSize(16, _limitH);
}


ScrollContainerWidget::~ScrollContainerWidget() {}

int16 ScrollContainerWidget::getChildX() const {
	return getAbsX() - _scrolledX;
}

int16 ScrollContainerWidget::getChildY() const {
	return getAbsY() - _scrolledY;
}

uint16 ScrollContainerWidget::getWidth() const {
	return (_boss ? _boss->getWidth() : _w);
}

uint16 ScrollContainerWidget::getHeight() const {
	return _limitH;
}

void ScrollContainerWidget::handleCommand(CommandSender *sender, uint32 cmd, uint32 data) {
	Widget::handleCommand(sender, cmd, data);	
	switch (cmd) {
	case kSetPositionCmd:
		_scrolledY = _verticalScroll->_currentPos;
		recalc();
		draw();
		break;
	}	
}

void ScrollContainerWidget::reflowLayout() {
	recalc();
	Widget::reflowLayout();
}

void ScrollContainerWidget::drawWidget() {
	g_gui.theme()->drawDialogBackground(Common::Rect(_x, _y, _x + _w, _y + getHeight()), ThemeEngine::kDialogBackgroundDefault);
}

Widget *ScrollContainerWidget::findWidget(int x, int y) {
	return Widget::findWidgetInChain(_firstWidget, x + _scrolledX, y + _scrolledY);
}

} // End of namespace GUI