lbajardsilogic@164: /****************************************************************************
lbajardsilogic@164: **
lbajardsilogic@164: ** Copyright (C) 2004-2007 Trolltech ASA. All rights reserved.
lbajardsilogic@164: **
lbajardsilogic@164: ** This file is part of the example classes of the Qt Toolkit.
lbajardsilogic@164: **
lbajardsilogic@164: ** This file may be used under the terms of the GNU General Public
lbajardsilogic@164: ** License version 2.0 as published by the Free Software Foundation
lbajardsilogic@164: ** and appearing in the file LICENSE.GPL included in the packaging of
lbajardsilogic@164: ** this file.  Please review the following information to ensure GNU
lbajardsilogic@164: ** General Public Licensing requirements will be met:
lbajardsilogic@164: ** http://www.trolltech.com/products/qt/opensource.html
lbajardsilogic@164: **
lbajardsilogic@164: ** If you are unsure which license is appropriate for your use, please
lbajardsilogic@164: ** review the following information:
lbajardsilogic@164: ** http://www.trolltech.com/products/qt/licensing.html or contact the
lbajardsilogic@164: ** sales department at sales@trolltech.com.
lbajardsilogic@164: **
lbajardsilogic@164: ** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
lbajardsilogic@164: ** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
lbajardsilogic@164: **
lbajardsilogic@164: ****************************************************************************/
lbajardsilogic@164: 
lbajardsilogic@164: #include <QtGui>
lbajardsilogic@164: 
lbajardsilogic@164: #include "FlowLayout.h"
lbajardsilogic@164: 
lbajardsilogic@164: FlowLayout::FlowLayout(QWidget *parent, int margin, int spacing)
lbajardsilogic@164:     : QLayout(parent)
lbajardsilogic@164: {
lbajardsilogic@164:     setMargin(margin);
lbajardsilogic@164:     setSpacing(spacing);
lbajardsilogic@164: }
lbajardsilogic@164: 
lbajardsilogic@164: FlowLayout::FlowLayout(int spacing)
lbajardsilogic@164: {
lbajardsilogic@164:     setSpacing(spacing);
lbajardsilogic@164: }
lbajardsilogic@164: 
lbajardsilogic@164: FlowLayout::~FlowLayout()
lbajardsilogic@164: {
lbajardsilogic@164:     QLayoutItem *item;
lbajardsilogic@164:     while ((item = takeAt(0)))
lbajardsilogic@164:         delete item;
lbajardsilogic@164: }
lbajardsilogic@164: 
lbajardsilogic@164: void FlowLayout::addItem(QLayoutItem *item)
lbajardsilogic@164: {
lbajardsilogic@164:     m_itemList.append(item);
lbajardsilogic@164: }
lbajardsilogic@164: 
lbajardsilogic@164: int FlowLayout::count() const
lbajardsilogic@164: {
lbajardsilogic@164:     return m_itemList.size();
lbajardsilogic@164: }
lbajardsilogic@164: 
lbajardsilogic@164: QLayoutItem *FlowLayout::itemAt(int index) const
lbajardsilogic@164: {
lbajardsilogic@164:     return m_itemList.value(index);
lbajardsilogic@164: }
lbajardsilogic@164: 
lbajardsilogic@164: QLayoutItem *FlowLayout::takeAt(int index)
lbajardsilogic@164: {
lbajardsilogic@164:     if (index >= 0 && index < m_itemList.size())
lbajardsilogic@164:         return m_itemList.takeAt(index);
lbajardsilogic@164:     else
lbajardsilogic@164:         return 0;
lbajardsilogic@164: }
lbajardsilogic@164: 
lbajardsilogic@164: Qt::Orientations FlowLayout::expandingDirections() const
lbajardsilogic@164: {
lbajardsilogic@164:     return 0;
lbajardsilogic@164: }
lbajardsilogic@164: 
lbajardsilogic@164: bool FlowLayout::hasHeightForWidth() const
lbajardsilogic@164: {
lbajardsilogic@164:     return true;
lbajardsilogic@164: }
lbajardsilogic@164: 
lbajardsilogic@164: int FlowLayout::heightForWidth(int width) const
lbajardsilogic@164: {
lbajardsilogic@164:     int height = doLayout(QRect(0, 0, width, 0), true);
lbajardsilogic@164:     return height;
lbajardsilogic@164: }
lbajardsilogic@164: 
lbajardsilogic@164: void FlowLayout::setGeometry(const QRect &rect)
lbajardsilogic@164: {
lbajardsilogic@164:     QLayout::setGeometry(rect);
lbajardsilogic@164:     doLayout(rect, false);
lbajardsilogic@164: }
lbajardsilogic@164: 
lbajardsilogic@164: QSize FlowLayout::sizeHint() const
lbajardsilogic@164: {
lbajardsilogic@166: 	return minimumSize();
lbajardsilogic@164: }
lbajardsilogic@164: 
lbajardsilogic@164: QSize FlowLayout::minimumSize() const
lbajardsilogic@164: {
lbajardsilogic@164:     QSize size;
lbajardsilogic@164:     QLayoutItem *item;
lbajardsilogic@164:     QLayoutItem *itemXMax = 0;
lbajardsilogic@164:     QLayoutItem *itemYMax = 0;
lbajardsilogic@164:     foreach (item, m_itemList)
lbajardsilogic@164: 	{
lbajardsilogic@164: 		//init itemXMax and itemYMax 
lbajardsilogic@164: 		if ((itemXMax == 0) && (itemYMax == 0))
lbajardsilogic@164: 		{
lbajardsilogic@164: 			itemXMax = item;
lbajardsilogic@164: 			itemYMax = item;
lbajardsilogic@164: 		}
lbajardsilogic@164: 
lbajardsilogic@164: 		//find XMax
lbajardsilogic@166: 		if ( (itemXMax->geometry().x() < item->geometry().x()) ||
lbajardsilogic@166: 			 ( (itemXMax->geometry().x() == item->geometry().x()) && (itemXMax->geometry().width() < item->geometry().width()) ) )
lbajardsilogic@164: 		{
lbajardsilogic@164: 			itemXMax = item;
lbajardsilogic@164: 		}
lbajardsilogic@164: 
lbajardsilogic@164:         //find YMax
lbajardsilogic@166: 		if ( (itemYMax->geometry().y() < item->geometry().y()) ||
lbajardsilogic@166: 			( (itemYMax->geometry().y() == item->geometry().y()) && (itemYMax->geometry().height() < item->geometry().height()) ) )
lbajardsilogic@164: 		{
lbajardsilogic@164: 			itemYMax = item;
lbajardsilogic@164: 		}
lbajardsilogic@164: 	}
lbajardsilogic@164: 
lbajardsilogic@164: 	if ((itemXMax != 0) && (itemYMax != 0))
lbajardsilogic@164: 		size = QSize(itemXMax->geometry().x() + itemXMax->minimumSize().width(), itemYMax->geometry().y() + itemYMax->minimumSize().height());
lbajardsilogic@164: 
lbajardsilogic@164:     size += QSize(2*margin(), 2*margin());
lbajardsilogic@164:     return size;
lbajardsilogic@164: }
lbajardsilogic@164: 
lbajardsilogic@164: int FlowLayout::doLayout(const QRect &rect, bool testOnly) const
lbajardsilogic@164: {
lbajardsilogic@164:     int x = rect.x();
lbajardsilogic@164:     int y = rect.y();
lbajardsilogic@164:     int lineHeight = 0;
lbajardsilogic@164: 
lbajardsilogic@164:     QLayoutItem *item;
lbajardsilogic@164:     foreach (item, m_itemList) {
lbajardsilogic@164:         int nextX = x + item->sizeHint().width() + spacing();
lbajardsilogic@164:         if (nextX - spacing() > rect.right() && lineHeight > 0) {
lbajardsilogic@164:             x = rect.x();
lbajardsilogic@164:             y = y + lineHeight + spacing();
lbajardsilogic@164:             nextX = x + item->sizeHint().width() + spacing();
lbajardsilogic@164:             lineHeight = 0;
lbajardsilogic@164:         }
lbajardsilogic@164: 
lbajardsilogic@164:         if (!testOnly)
lbajardsilogic@164:             item->setGeometry(QRect(QPoint(x, y), item->sizeHint()));
lbajardsilogic@164: 
lbajardsilogic@164:         x = nextX;
lbajardsilogic@164:         lineHeight = qMax(lineHeight, item->sizeHint().height());
lbajardsilogic@164:     }
lbajardsilogic@164: 	
lbajardsilogic@164:     return y + lineHeight - rect.y();
lbajardsilogic@164: }