Rework selections to make them not fail with weird button combinations
[quassel.git] / src / qtui / chatscene.h
1 /***************************************************************************
2  *   Copyright (C) 2005-08 by the Quassel Project                          *
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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 ChatItem;
32 class ChatLine;
33 class ColumnHandleItem;
34
35 class QGraphicsSceneMouseEvent;
36
37 class ChatScene : public QGraphicsScene {
38   Q_OBJECT
39
40   public:
41     ChatScene(QAbstractItemModel *model, const QString &idString, QObject *parent);
42     virtual ~ChatScene();
43
44     inline QAbstractItemModel *model() const { return _model; }
45     inline QString idString() const { return _idString; }
46
47     inline bool isFetchingBacklog() const;
48     inline bool isBacklogFetchingEnabled() const;
49     inline BufferId bufferForBacklogFetching() const;
50     int sectionByScenePos(int x);
51     inline int sectionByScenePos(const QPoint &pos) { return sectionByScenePos(pos.x()); }
52     inline bool isSingleBufferScene() const { return _singleBufferScene; }
53
54   public slots:
55     void setWidth(qreal);
56
57     // these are used by the chatitems to notify the scene and manage selections
58     void setSelectingItem(ChatItem *item);
59     ChatItem *selectingItem() const { return _selectingItem; }
60     void startGlobalSelection(ChatItem *item, const QPointF &itemPos);
61
62     void setIsFetchingBacklog(bool);
63     inline void setBufferForBacklogFetching(BufferId buffer);
64
65   signals:
66     void heightChanged(qreal height);
67
68   protected:
69     virtual void mouseMoveEvent(QGraphicsSceneMouseEvent *mouseEvent);
70     virtual void mousePressEvent(QGraphicsSceneMouseEvent *mouseEvent);
71     virtual void mouseReleaseEvent(QGraphicsSceneMouseEvent *mouseEvent);
72
73   protected slots:
74     void rowsInserted(const QModelIndex &, int, int);
75     void modelReset();
76
77   private slots:
78     void rectChanged(const QRectF &);
79     void handlePositionChanged(qreal xpos);
80
81   private:
82     void updateSelection(const QPointF &pos);
83     QString selectionToString() const;
84     void requestBacklogIfNeeded();
85
86     QString _idString;
87     qreal _width, _height;
88     QAbstractItemModel *_model;
89     QList<ChatLine *> _lines;
90     bool _singleBufferScene;
91
92     ColumnHandleItem *firstColHandle, *secondColHandle;
93     qreal firstColHandlePos, secondColHandlePos;
94
95     ChatItem *_selectingItem, *_lastItem;
96     QSet<ChatLine *> _selectedItems;
97     int _selectionStartCol, _selectionMinCol;
98     int _selectionStart;
99     int _selectionEnd;
100     int _firstSelectionRow, _lastSelectionRow;
101     bool _isSelecting;
102
103     bool _fetchingBacklog;
104     BufferId _backlogFetchingBuffer;
105     MsgId _lastBacklogOffset;
106     int _lastBacklogSize;
107 };
108
109 bool ChatScene::isFetchingBacklog() const {
110   return _fetchingBacklog;
111 }
112
113 bool ChatScene::isBacklogFetchingEnabled() const {
114   return _backlogFetchingBuffer.isValid();
115 }
116
117 BufferId ChatScene::bufferForBacklogFetching() const {
118   return _backlogFetchingBuffer;
119 }
120
121 void ChatScene::setBufferForBacklogFetching(BufferId buf) {
122   _backlogFetchingBuffer = buf;
123 }
124
125 #endif