src/qtui/chatscene.h

   1 /***************************************************************************
   2  *   Copyright (C) 2005-08 by the Quassel Project                          *
   3  *   devel@quassel-irc.org                                                 *
   4  *                                                                         *
   5  *   This program is free software; you can redistribute it and/or modify  *
   6  *   it under the terms of the GNU General Public License as published by  *
   7  *   the Free Software Foundation; either version 2 of the License, or     *
   8  *   (at your option) version 3.                                           *
   9  *                                                                         *
  10  *   This program is distributed in the hope that it will be useful,       *
  11  *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
  12  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
  13  *   GNU General Public License for more details.                          *
  14  *                                                                         *
  15  *   You should have received a copy of the GNU General Public License     *
  16  *   along with this program; if not, write to the                         *
  17  *   Free Software Foundation, Inc.,                                       *
  18  *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
  19  ***************************************************************************/
  20
  21 #ifndef _CHATSCENE_H_
  22 #define _CHATSCENE_H_
  23
  24 #include <QAbstractItemModel>
  25 #include <QGraphicsScene>
  26 #include <QSet>
  27
  28 #include "types.h"
  29
  30 class AbstractUiMsg;
  31 class Buffer;
  32 class BufferId;
  33 class ChatItem;
  34 class ChatLine;
  35 class ColumnHandleItem;
  36
  37 class QGraphicsSceneMouseEvent;
  38
  39 class ChatScene : public QGraphicsScene {
  40   Q_OBJECT
  41
  42   public:
  43     ChatScene(QAbstractItemModel *model, const QString &idString, QObject *parent);
  44     virtual ~ChatScene();
  45
  46     inline QAbstractItemModel *model() const { return _model; }
  47     inline QString idString() const { return _idString; }
  48
  49     inline bool isFetchingBacklog() const;
  50     inline bool isBacklogFetchingEnabled() const;
  51     inline BufferId bufferForBacklogFetching() const;
  52
  53   public slots:
  54     void setWidth(qreal);
  55
  56     // these are used by the chatitems to notify the scene and manage selections
  57     void setSelectingItem(ChatItem *item);
  58     ChatItem *selectingItem() const { return _selectingItem; }
  59     void startGlobalSelection(ChatItem *item, const QPointF &itemPos);
  60
  61     void setIsFetchingBacklog(bool);
  62     inline void setBufferForBacklogFetching(BufferId buffer);
  63
  64   signals:
  65     void heightChanged(qreal height);
  66
  67   protected:
  68     virtual void mouseMoveEvent(QGraphicsSceneMouseEvent *mouseEvent);
  69     virtual void mousePressEvent(QGraphicsSceneMouseEvent *mouseEvent);
  70     virtual void mouseReleaseEvent(QGraphicsSceneMouseEvent *mouseEvent);
  71
  72   protected slots:
  73     void rowsInserted(const QModelIndex &, int, int);
  74     void modelReset();
  75
  76   private slots:
  77     void rectChanged(const QRectF &);
  78     void handlePositionChanged(qreal xpos);
  79
  80   private:
  81     void updateSelection(const QPointF &pos);
  82     QString selectionToString() const;
  83     void requestBacklogIfNeeded();
  84
  85     QString _idString;
  86     qreal _width, _height;
  87     QAbstractItemModel *_model;
  88     QList<ChatLine *> _lines;
  89
  90     ColumnHandleItem *firstColHandle, *secondColHandle;
  91     qreal firstColHandlePos, secondColHandlePos;
  92
  93     ChatItem *_selectingItem, *_lastItem;
  94     QSet<ChatLine *> _selectedItems;
  95     int _selectionStartCol, _selectionMinCol;
  96     int _selectionStart;
  97     int _selectionEnd;
  98     bool _isSelecting;
  99
 100     bool _fetchingBacklog;
 101     BufferId _backlogFetchingBuffer;
 102     MsgId _lastBacklogOffset;
 103     int _lastBacklogSize;
 104 };
 105
 106 bool ChatScene::isFetchingBacklog() const {
 107   return _fetchingBacklog;
 108 }
 109
 110 bool ChatScene::isBacklogFetchingEnabled() const {
 111   return _backlogFetchingBuffer.isValid();
 112 }
 113
 114 BufferId ChatScene::bufferForBacklogFetching() const {
 115   return _backlogFetchingBuffer;
 116 }
 117
 118 void ChatScene::setBufferForBacklogFetching(BufferId buf) {
 119   _backlogFetchingBuffer = buf;
 120 }
 121
 122 #endif