workspace/kcontrol/kdm/background/bgmonitor.h

   1 /* vi: ts=8 sts=4 sw=4
   2    kate: space-indent on; indent-width 4; indent-mode cstyle;
   3
   4    This file is part of the KDE project, module kcmbackground.
   5
   6    Copyright (C) 2002 Laurent Montel <montell@club-internet.fr>
   7    Copyright (C) 2003 Waldo Bastian <bastian@kde.org>
   8    Copyright (C) 2005 David Saxton <david@bluehaze.org>
   9
  10    This program is free software; you can redistribute it and/or
  11    modify it under the terms of the GNU General Public License
  12    version 2 as published by the Free Software Foundation.
  13
  14    This library is distributed in the hope that it will be useful,
  15    but WITHOUT ANY WARRANTY; without even the implied warranty of
  16    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  17    Library General Public License for more details.
  18
  19    You should have received a copy of the GNU Library General Public License
  20    along with this library; see the file COPYING.LIB.  If not, write to
  21    the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  22    Boston, MA 02110-1301, USA.
  23  */
  24
  25 #ifndef _BGMONITOR_H_
  26 #define _BGMONITOR_H_
  27
  28 #include <QWidget>
  29 #include <QLabel>
  30 //Added by qt3to4:
  31 #include <QDragEnterEvent>
  32 #include <QDropEvent>
  33
  34 class BGMonitor;
  35 class BGMonitorLabel;
  36 class QPixmap;
  37
  38   /**
  39  * This class arranges and resizes a set of monitor images according to the
  40  * monitor geometries.
  41  */
  42 class BGMonitorArrangement : public QWidget
  43 {
  44     Q_OBJECT
  45 public:
  46     BGMonitorArrangement(QWidget *parent);
  47
  48     /**
  49      * Splits up the pixmap according to monitor geometries and sets each
  50      * BGMonitor pixmap accordingly.
  51      */
  52     void setPixmap( const QPixmap & pm );
  53     QSize combinedPreviewSize() const { return m_combinedPreviewSize; }
  54     QSize maxPreviewSize() const { return m_maxPreviewSize; }
  55     unsigned numMonitors() const { return m_pBGMonitor.size(); }
  56
  57     BGMonitor * monitor( unsigned screen ) const;
  58     void updateArrangement();
  59
  60 signals:
  61     void imageDropped(const QString &);
  62
  63 protected:
  64     virtual void resizeEvent( QResizeEvent * );
  65     QRect expandToPreview( const QRect &r ) const;
  66     QSize expandToPreview( const QSize &s ) const;
  67     QPoint expandToPreview( const QPoint &p ) const;
  68
  69     QVector<BGMonitorLabel*> m_pBGMonitor;
  70     QSize m_combinedPreviewSize;
  71     QSize m_maxPreviewSize;
  72 };
  73
  74 /**
  75  * Contains a BGMonitor.
  76  */
  77 class BGMonitorLabel : public QLabel
  78 {
  79 public:
  80     explicit BGMonitorLabel(QWidget *parent, const char *name=0L);
  81
  82     BGMonitor * monitor() const { return m_pBGMonitor; }
  83     void updateMonitorGeometry();
  84
  85     void setPreviewPosition( const QRect &r ) { m_previewPosition = r; }
  86     QRect previewPosition() const { return m_previewPosition; }
  87
  88 protected:
  89     virtual void resizeEvent( QResizeEvent * );
  90     BGMonitor * m_pBGMonitor;
  91     QRect m_previewPosition;
  92 };
  93
  94 /**
  95  * This class handles drops on the preview monitor.
  96  */
  97 class BGMonitor : public QLabel
  98 {
  99     Q_OBJECT
 100 public:
 101
 102     explicit BGMonitor(QWidget *parent, const char *name=0L);
 103
 104 Q_SIGNALS:
 105     void imageDropped(const QString &);
 106
 107 protected:
 108     virtual void dropEvent(QDropEvent *);
 109     virtual void dragEnterEvent(QDragEnterEvent *);
 110 };
 111
 112
 113 #endif