1 /***************************************************************************
2 * Copyright (C) 2005-2010 by the Quassel Project *
3 * devel@quassel-irc.org *
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. *
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. *
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 ***************************************************************************/
24 #include <QAbstractItemModel>
26 #include <QGraphicsItem>
27 #include <QGraphicsScene>
31 #include "chatlinemodel.h"
32 #include "messagefilter.h"
38 class ColumnHandleItem;
41 class QGraphicsSceneMouseEvent;
43 class ChatScene : public QGraphicsScene {
53 ChatLineType = QGraphicsItem::UserType + 1,
55 TimestampChatItemType,
71 ChatScene(QAbstractItemModel *model, const QString &idString, qreal width, ChatView *parent);
74 inline QAbstractItemModel *model() const { return _model; }
75 inline MessageFilter *filter() const { return qobject_cast<MessageFilter*>(_model); }
76 inline QString idString() const { return _idString; }
78 int rowByScenePos(qreal y) const;
79 inline int rowByScenePos(const QPointF &pos) const { return rowByScenePos(pos.y()); }
80 ChatLineModel::ColumnType columnByScenePos(qreal x) const ;
81 inline ChatLineModel::ColumnType columnByScenePos(const QPointF &pos) const { return columnByScenePos(pos.x()); }
83 ChatView *chatView() const;
84 ChatItem *chatItemAt(const QPointF &pos) const;
85 inline ChatLine *chatLine(int row) const { return (row < _lines.count()) ? _lines.value(row) : 0; }
86 inline ChatLine *chatLine(const QModelIndex &index) const { return _lines.value(index.row()); }
88 //! Find the ChatLine belonging to a MsgId
89 /** Searches for the ChatLine belonging to a MsgId.
90 * Note that this method performs a binary search, hence it has as complexity of O(log n).
91 * If there is more than one ChatLine for the given ID, the first one will be returned.
92 * \param msgId The message ID to look for
93 * \return The ChatLine corresponding to the given MsgId
95 ChatLine *chatLine(MsgId msgId) const;
97 inline ChatLine *lastLine() const { return _lines.count() ? _lines.last() : 0; }
99 inline bool isSingleBufferScene() const { return _singleBufferId.isValid(); }
100 inline BufferId singleBufferId() const { return _singleBufferId; }
101 bool containsBuffer(const BufferId &id) const;
103 ColumnHandleItem *firstColumnHandle() const;
104 ColumnHandleItem *secondColumnHandle() const;
106 inline CutoffMode senderCutoffMode() const { return _cutoffMode; }
107 inline void setSenderCutoffMode(CutoffMode mode) { _cutoffMode = mode; }
109 QString selection() const;
110 bool hasSelection() const;
111 bool hasGlobalSelection() const;
112 bool isPosOverSelection(const QPointF &) const;
113 bool isGloballySelecting() const;
114 void initiateDrag(QWidget *source);
116 bool isScrollingAllowed() const;
118 virtual bool event(QEvent *e);
121 void updateForViewport(qreal width, qreal height);
122 void setWidth(qreal width);
123 void layout(int start, int end, qreal width);
125 // these are used by the chatitems to notify the scene and manage selections
126 void setSelectingItem(ChatItem *item);
127 ChatItem *selectingItem() const { return _selectingItem; }
128 void startGlobalSelection(ChatItem *item, const QPointF &itemPos);
129 void clearGlobalSelection();
130 void clearSelection();
131 void selectionToClipboard(QClipboard::Mode = QClipboard::Clipboard);
132 void stringToClipboard(const QString &str, QClipboard::Mode = QClipboard::Clipboard);
134 void requestBacklog();
137 void loadWebPreview(ChatItem *parentItem, const QUrl &url, const QRectF &urlRect);
138 void clearWebPreview(ChatItem *parentItem = 0);
142 void lastLineChanged(QGraphicsItem *item, qreal offset);
143 void layoutChanged(); // indicates changes to the scenerect due to resizing of the contentsitems
144 void mouseMoveWhileSelecting(const QPointF &scenePos);
147 virtual void contextMenuEvent(QGraphicsSceneContextMenuEvent *contextMenuEvent);
148 virtual void mouseMoveEvent(QGraphicsSceneMouseEvent *mouseEvent);
149 virtual void mousePressEvent(QGraphicsSceneMouseEvent *mouseEvent);
150 virtual void mouseReleaseEvent(QGraphicsSceneMouseEvent *mouseEvent);
151 virtual void mouseDoubleClickEvent(QGraphicsSceneMouseEvent *mouseEvent);
152 virtual void handleClick(Qt::MouseButton button, const QPointF &scenePos);
155 void rowsInserted(const QModelIndex &, int, int);
156 void rowsAboutToBeRemoved(const QModelIndex &, int, int);
157 void dataChanged(const QModelIndex &, const QModelIndex &);
160 void firstHandlePositionChanged(qreal xpos);
161 void secondHandlePositionChanged(qreal xpos);
163 void webPreviewNextStep();
165 void showWebPreviewChanged();
170 void setHandleXLimits();
171 void updateSelection(const QPointF &pos);
175 QAbstractItemModel *_model;
176 QList<ChatLine *> _lines;
177 BufferId _singleBufferId;
179 // calls to QChatScene::sceneRect() are very expensive. As we manage the scenerect ourselves
180 // we store the size in a member variable.
182 int _firstLineRow; // the first row to display (aka: not a daychange msg)
183 void updateSceneRect(qreal width);
184 inline void updateSceneRect() { updateSceneRect(_sceneRect.width()); }
185 void updateSceneRect(const QRectF &rect);
186 qreal _viewportHeight;
188 ColumnHandleItem *_firstColHandle, *_secondColHandle;
189 qreal _firstColHandlePos, _secondColHandlePos;
190 CutoffMode _cutoffMode;
192 ChatItem *_selectingItem;
193 int _selectionStartCol, _selectionMinCol;
196 int _firstSelectionRow;
200 ClickMode _clickMode;
203 bool _leftButtonPressed;
205 bool _showWebPreview;
216 ChatItem *parentItem;
217 QGraphicsItem *previewItem;
220 PreviewState previewState;
222 WebPreview() : parentItem(0), previewItem(0), previewState(NoPreview) {}
224 WebPreview webPreview;
225 #endif // HAVE_WEBKIT