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layoutwidget.h

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00001 /***************************************************************************
00002  *   Copyright (C) 2007 by Robert Knight <robertknight@gmail.com>          *
00003  *   Copyright (C) 2008 by Alexis Ménard <darktears31@gmail.com>           *
00004  *                                                                         *
00005  *   This program is free software; you can redistribute it and/or modify  *
00006  *   it under the terms of the GNU General Public License as published by  *
00007  *   the Free Software Foundation; either version 2 of the License, or     *
00008  *   (at your option) any later version.                                   *
00009  *                                                                         *
00010  *   This program is distributed in the hope that it will be useful,       *
00011  *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
00012  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
00013  *   GNU General Public License for more details.                          *
00014  *                                                                         *
00015  *   You should have received a copy of the GNU General Public License     *
00016  *   along with this program; if not, write to the                         *
00017  *   Free Software Foundation, Inc.,                                       *
00018  *   51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA .        *
00019  ***************************************************************************/
00020 
00021 
00022 #ifndef LAYOUTWIDGET_H
00023 #define LAYOUTWIDGET_H
00024 
00025 //Own
00026 #include "tasks.h"
00027 
00028 // Qt
00029 #include <QObject>
00030 #include <QGraphicsGridLayout>
00031 #include <QList>
00032 #include <QMultiMap>
00033 
00034 
00035 class TaskGroupItem;
00036 class AbstractTaskItem;
00037 
00038 using TaskManager::StartupPtr;
00039 using TaskManager::TaskPtr;
00040 using TaskManager::GroupManager;
00041 
00042 
00046 class LayoutWidget : public QObject
00047 {
00048     Q_OBJECT
00049 
00050 public:
00051     LayoutWidget(TaskGroupItem * parent, Tasks *applet);
00052     ~LayoutWidget();
00054     void addTaskItem(AbstractTaskItem*);
00055     void removeTaskItem(AbstractTaskItem*);
00057     bool insert(int index, AbstractTaskItem* item);
00058 
00060     int insertionIndexAt(const QPointF &pos);
00062     void setMaximumRows(int);
00064     void setForceRows(bool);
00065 
00067     int size();
00068 
00070     int numberOfRows();
00072     int numberOfColumns();
00073 
00075     int maximumRows();
00077     int preferredColumns();
00078 
00079 public Q_SLOTS:
00080     void update();
00081 
00082 private Q_SLOTS:
00083     void constraintsChanged(Plasma::Constraints);
00084 
00085 Q_SIGNALS:
00086     void sizeHintChanged(Qt::SizeHint);
00087 
00088 private:
00089     void init();
00090 
00091     //void calculatePreferredRowSize();
00092     bool remove(AbstractTaskItem* item);
00093 
00094     void adjustStretch();
00095     void updatePreferredSize();
00096 
00098     void layoutItems();
00099 
00100     bool m_hasSpacer;
00101     QGraphicsWidget *m_spacer;
00102 
00103     TaskGroupItem *m_groupItem;
00104     QList <AbstractTaskItem*> m_itemPositions;
00106     QPair<int, int> gridLayoutSize();
00107 
00109     int m_rowSize;
00111     int m_maxRows;
00112 
00113     bool m_forceRows;
00114 
00115     Tasks *m_applet;
00117     void createLayout();
00118     QGraphicsGridLayout *m_layout;
00119 };
00120 
00121 #endif

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