Stage 3

[quassel.git] / src / qtui / chatwidget.h

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+/***************************************************************************
+ *   Copyright (C) 2005/06 by The Quassel 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 _CHATWIDGET_H_
+#define _CHATWIDGET_H_
+
+//#include "style.h"
+//#include "message.h"
+//#include "buffer.h"
+//#include <QtCore>
+#include <QtGui>
+
+class ChatLine;
+class AbstractUiMsg;
+
+//!\brief Scroll area showing part of the chat messages for a given buffer.
+/** The contents of the scroll area, i.e. a widget of type ChatWidgetContents,
+ * needs to be provided by calling init(). We don't create this widget ourselves, because
+ * while a ChatWidget will be destroyed and recreated quite often (for example when switching
+ * buffers), there ususally is no need to re-render its content every time (which can be time-consuming).
+ * Before a ChatWidget is destroyed, it gives up its ownership of its contents, referring responsibility
+ * back to where it came from.
+ *
+ * Because we use this as a custom widget in Qt Designer, we cannot use a constructor that takes custom
+ * parameters. Instead, it is mandatory to call init() before using this widget.
+ */
+class ChatWidget : public QAbstractScrollArea {
+  Q_OBJECT
+
+  public:
+    ChatWidget(QWidget *parent = 0);
+    ~ChatWidget();
+    void init(QString net, QString buf);
+
+    virtual QSize sizeHint() const;
+
+  public slots:
+    void clear();
+
+    void prependMsg(AbstractUiMsg *);
+    void appendMsg(AbstractUiMsg *);
+
+    void prependChatLine(ChatLine *);
+    void appendChatLine(ChatLine *);
+    void prependChatLines(QList<ChatLine *>);
+    void appendChatLines(QList<ChatLine *>);
+    void setContents(QList<ChatLine *>);
+
+  protected:
+    virtual void resizeEvent(QResizeEvent *event);
+    virtual void paintEvent(QPaintEvent * event);
+    virtual void mousePressEvent(QMouseEvent *event);
+    virtual void mouseReleaseEvent(QMouseEvent *event);
+    virtual void mouseMoveEvent(QMouseEvent *event);
+    virtual void mouseDoubleClickEvent(QMouseEvent *event);
+
+  private slots:
+    void layout();
+    void scrollBarAction(int);
+    void scrollBarValChanged(int);
+    void ensureVisible(int line);
+    void handleScrollTimer();
+
+  private:
+    QString networkName, bufferName;
+    enum SelectionMode { NoSelection, TextSelected, LinesSelected };
+    enum MouseMode { Normal, Pressed, DragTsSep, DragTextSep, MarkText, MarkLines };
+    enum MousePos { None, OverTsSep, OverTextSep, OverUrl };
+    MouseMode mouseMode;
+    MousePos mousePos;
+    QPoint dragStartPos;
+    MouseMode dragStartMode;
+    int dragStartLine;
+    int dragStartCursor;
+    int curCursor;
+    int curLine;
+    SelectionMode selectionMode;
+    int selectionStart, selectionEnd, selectionLine;
+
+    int bottomLine, bottomLineOffset;
+
+    QList<ChatLine *> lines;
+    QList<qreal> ycoords;
+    QTimer *scrollTimer;
+    QPoint pointerPosition;
+
+    int senderX;
+    int textX;
+    int tsWidth;
+    int senderWidth;
+    int textWidth;
+    int tsGrabPos;     ///< X-Position for changing the timestamp width
+    int senderGrabPos;
+    void computePositions();
+
+    int width;
+    qreal height;
+    qreal y;
+
+    void adjustScrollBar();
+
+    int yToLineIdx(qreal y);
+    void clearSelection();
+    QString selectionToString();
+    void handleMouseMoveEvent(const QPoint &pos);
+
+};
+
+#endif