_fontMetrics(0),
_col(col),
_lines(0),
- _layout(0),
+ _layoutData(0),
_selectionMode(NoSelection),
_selectionStart(-1)
{
}
ChatItem::~ChatItem() {
- delete _layout;
+ delete _layoutData;
}
QVariant ChatItem::data(int role) const {
return layout;
}
+void ChatItem::setLayout(QTextLayout *layout) {
+ if(!_layoutData)
+ _layoutData = new LayoutData;
+ _layoutData->layout = layout;
+}
+
void ChatItem::updateLayout() {
switch(data(ChatLineModel::ColumnTypeRole).toUInt()) {
case ChatLineModel::TimestampColumn:
- if(!haveLayout()) _layout = createLayout(QTextOption::WrapAnywhere, Qt::AlignLeft);
+ if(!haveLayout()) setLayout(createLayout(QTextOption::WrapAnywhere, Qt::AlignLeft));
// fallthrough
case ChatLineModel::SenderColumn:
- if(!haveLayout()) _layout = createLayout(QTextOption::WrapAnywhere, Qt::AlignRight);
- _layout->beginLayout();
+ if(!haveLayout()) setLayout(createLayout(QTextOption::WrapAnywhere, Qt::AlignRight));
+ layout()->beginLayout();
{
- QTextLine line = _layout->createLine();
+ QTextLine line = layout()->createLine();
if(line.isValid()) {
line.setLineWidth(width());
line.setPosition(QPointF(0,0));
}
- _layout->endLayout();
+ layout()->endLayout();
}
break;
case ChatLineModel::ContentsColumn: {
- if(!haveLayout()) _layout = createLayout(QTextOption::WrapAnywhere);
+ if(!haveLayout()) setLayout(createLayout(QTextOption::WrapAnywhere));
// Now layout
ChatLineModel::WrapList wrapList = data(ChatLineModel::WrapListRole).value<ChatLineModel::WrapList>();
qreal h = 0;
WrapColumnFinder finder(this);
- _layout->beginLayout();
+ layout()->beginLayout();
forever {
- QTextLine line = _layout->createLine();
+ QTextLine line = layout()->createLine();
if(!line.isValid())
break;
int col = finder.nextWrapColumn();
- line.setNumColumns(col >= 0 ? col - line.textStart() : _layout->text().length());
+ line.setNumColumns(col >= 0 ? col - line.textStart() : layout()->text().length());
line.setPosition(QPointF(0, h));
h += line.height() + fontMetrics()->leading();
}
- _layout->endLayout();
+ layout()->endLayout();
}
break;
}
}
-void ChatItem::clearLayout() {
- delete _layout;
- _layout = 0;
+void ChatItem::clearLayoutData() {
+ delete _layoutData;
+ _layoutData = 0;
}
// NOTE: This is not the most time-efficient implementation, but it saves space by not caching unnecessary data
}
formats.append(selectFmt);
}
- _layout->draw(painter, QPointF(0,0), formats, boundingRect());
+ layout()->draw(painter, QPointF(0,0), formats, boundingRect());
}
qint16 ChatItem::posToCursor(const QPointF &pos) {
if(pos.y() > height()) return data(MessageModel::DisplayRole).toString().length();
if(pos.y() < 0) return 0;
if(!haveLayout()) updateLayout();
- for(int l = _layout->lineCount() - 1; l >= 0; l--) {
- QTextLine line = _layout->lineAt(l);
+ for(int l = layout()->lineCount() - 1; l >= 0; l--) {
+ QTextLine line = layout()->lineAt(l);
if(pos.y() >= line.y()) {
return line.xToCursor(pos.x(), QTextLine::CursorOnCharacter);
}
inline qreal width() const { return _boundingRect.width(); }
inline qreal height() const { return _boundingRect.height(); }
- inline bool haveLayout() const { return _layout != 0; }
- void clearLayout();
+ inline bool haveLayout() const { return _layoutData != 0 && layout() != 0; }
+ void clearLayoutData();
void updateLayout();
virtual void paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget = 0);
virtual void hoverMoveEvent(QGraphicsSceneHoverEvent *event);
private:
+ struct LayoutData;
+ class WrapColumnFinder;
+
+ inline QTextLayout *layout() const;
+ void setLayout(QTextLayout *);
qint16 posToCursor(const QPointF &pos);
qreal computeHeight();
QTextLayout *createLayout(QTextOption::WrapMode, Qt::Alignment = Qt::AlignLeft);
int _col;
quint8 _lines;
- QTextLayout * _layout;
QList<quint16> _wrapPositions;
enum SelectionMode { NoSelection, PartialSelection, FullSelection };
SelectionMode _selectionMode;
qint16 _selectionStart, _selectionEnd;
- class WrapColumnFinder;
+ LayoutData *_layoutData;
+};
+
+struct ChatItem::LayoutData {
+ QTextLayout *layout;
+
+ LayoutData() { layout = 0; }
+ ~LayoutData() { delete layout; }
};
class ChatItem::WrapColumnFinder {
#include "chatline.h"
inline int ChatItem::row() const { return static_cast<ChatLine *>(parentItem())->row(); }
-
+inline QTextLayout *ChatItem::layout() const { return _layoutData->layout; }
#endif