Adding work-in-progress for the new QGraphicsScene-based chatview.

[quassel.git] / src / qtui / chatline-old.h

diff --git a/src/qtui/chatline-old.h b/src/qtui/chatline-old.h
new file mode 100644 (file)
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+++ b/src/qtui/chatline-old.h
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+/***************************************************************************
+ *   Copyright (C) 2005-07 by The Quassel IRC Development Team             *
+ *   devel@quassel-irc.org                                                 *
+ *                                                                         *
+ *   This program is free software; you can redistribute it and/or modify  *
+ *   it under the terms of the GNU General Public License as published by  *
+ *   the Free Software Foundation; either version 2 of the License, or     *
+ *   (at your option) any later version.                                   *
+ *                                                                         *
+ *   This program is distributed in the hope that it will be useful,       *
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
+ *   GNU General Public License for more details.                          *
+ *                                                                         *
+ *   You should have received a copy of the GNU General Public License     *
+ *   along with this program; if not, write to the                         *
+ *   Free Software Foundation, Inc.,                                       *
+ *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
+ ***************************************************************************/
+
+#ifndef _CHATLINE_H_
+#define _CHATLINE_H_
+
+#include <QtGui>
+
+#include "util.h"
+#include "uistyle.h"
+#include "quasselui.h"
+
+//FIXME: chatline doku
+//!\brief Containing the layout and providing the rendering of a single message.
+/** A ChatLine takes a Message object,
+ * formats it (by turning the various message types into a human-readable form and afterwards pumping it through
+ * our Style engine), and stores it as a number of QTextLayouts representing the three fields of a chat line
+ * (timestamp, sender and text). These layouts already include any rendering information such as font,
+ * color, or selected characters. By calling layout(), they can be quickly layouted to fit a given set of field widths.
+ * Afterwards, they can quickly be painted whenever necessary.
+ *
+ * By separating the complex and slow task of interpreting and formatting Message objects (which happens exactly once
+ * per message) from the actual layouting and painting, we gain a lot of speed compared to the standard Qt rendering
+ * functions.
+ */
+class ChatLine : public QObject, public AbstractUiMsg {
+  Q_OBJECT
+
+  public:
+    ChatLine(Message message);
+    virtual ~ChatLine();
+
+    qreal layout(qreal tsWidth, qreal nickWidth, qreal textWidth);
+    qreal height() const { return hght; }
+    int posToCursor(QPointF pos);
+    void draw(QPainter *p, const QPointF &pos);
+
+    enum SelectionMode { None, Partial, Full };
+    void setSelection(SelectionMode, int start = 0, int end = 0);
+
+    QDateTime timestamp() const;
+    QString sender() const;
+    QString text() const;
+    MsgId msgId() const;
+    BufferInfo bufferInfo() const;
+
+    bool isUrl(int pos) const;
+    QUrl getUrl(int pos) const;
+
+  public slots:
+
+  private:
+    qreal hght;
+    Message msg;
+    qreal tsWidth, senderWidth, textWidth;
+    UiStyle::StyledText styledTimeStamp, styledSender, styledText;
+
+    struct FormatRange {
+      int start;
+      int length;
+      int height;
+      QTextCharFormat format;
+    };
+    struct Word {
+      int start;
+      int length;
+      int trailing;
+      int height;
+    };
+    struct LineLayout {
+      int y;
+      int height;
+      int start;
+      int length;
+    };
+    QVector<int> charPos;
+    QVector<int> charWidths;
+    QVector<int> charHeights;
+    QVector<int> charUrlIdx;
+    QList<FormatRange> tsFormat, senderFormat, textFormat;
+    QList<Word> words;
+    QList<LineLayout> lineLayouts;
+    int minHeight;
+
+    SelectionMode selectionMode;
+    int selectionStart, selectionEnd;
+    void formatMsg(Message);
+    void precomputeLine();
+    QList<FormatRange> calcFormatRanges(const UiStyle::StyledText &, QTextLayout::FormatRange additional = QTextLayout::FormatRange());
+};
+
+#endif