workspace/libs/plasma/layouts/flowlayout.h

   1 /*
   2 *   Copyright 2007 by Robert Knight <robertknight@gmail.com>
   3 *
   4 *   This program is free software; you can redistribute it and/or modify
   5 *   it under the terms of the GNU Library General Public License
   6 *   as published by the Free Software Foundation; either
   7 *   version 2 of the License, or (at your option) any later version.
   8 *
   9 *   This program is distributed in the hope that it will be useful,
  10 *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 *   GNU General Public License for more details
  13 *
  14 *   You should have received a copy of the GNU Library General Public
  15 *   License along with this program; if not, write to the
  16 *   Free Software Foundation, Inc.,
  17 *   51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
  18 */
  19
  20 #ifndef __FLOWLAYOUT__
  21 #define __FLOWLAYOUT__
  22
  23 #include <QtGui/QGraphicsLayout>
  24
  25 #include <plasma/plasma_export.h>
  26
  27 namespace Plasma
  28 {
  29
  30 /**
  31  * A layout which lays items out left-to-right , top-to-bottom.
  32  *
  33  * This is similar to the layout of items in a QListView.
  34  */
  35 class PLASMA_EXPORT FlowLayout : public QGraphicsLayout
  36 {
  37 public:
  38     /** Construct a new flow layout with the specified parent. */
  39     explicit FlowLayout(QGraphicsLayoutItem* parent);
  40     virtual ~FlowLayout();
  41
  42     // reimplemented
  43     virtual int count() const;
  44     virtual void addItem(QGraphicsLayoutItem* item);
  45     virtual void removeItem(QGraphicsLayoutItem* item);
  46     virtual int indexOf(QGraphicsLayoutItem* item) const;
  47     virtual QGraphicsLayoutItem* itemAt(int i) const;
  48     virtual QGraphicsLayoutItem* takeAt(int i);
  49     virtual void removeAt(int i);
  50     virtual void setColumnWidth( const qreal width );
  51     virtual qreal columnWidth() const;
  52     virtual QRectF geometry() const;
  53     virtual void setGeometry(const QRectF &geom);
  54     qreal spacing() const;
  55     void setSpacing(qreal s);
  56
  57 protected:
  58     void relayout();
  59     virtual QSizeF sizeHint(Qt::SizeHint which, const QSizeF &constraint = QSizeF()) const;
  60
  61 private:
  62     class Private;
  63     Private *const d;
  64 };
  65
  66 }
  67
  68 #endif // __FLOWLAYOUT__
  69