_layout = 0;
_lines = 0;
_selectionStart = -1;
+ _selectionMode = NoSelection;
}
ChatItem::~ChatItem() {
return _index.data(role);
}
-int ChatItem::setWidth(int w) {
+qreal ChatItem::setWidth(qreal w) {
if(w == _boundingRect.width()) return _boundingRect.height();
prepareGeometryChange();
_boundingRect.setWidth(w);
- int h = heightForWidth(w);
+ qreal h = computeHeight();
_boundingRect.setHeight(h);
if(haveLayout()) updateLayout();
return h;
}
-int ChatItem::heightForWidth(int width) {
+qreal ChatItem::computeHeight() {
if(data(ChatLineModel::ColumnTypeRole).toUInt() != ChatLineModel::ContentsColumn)
return fontMetrics()->lineSpacing(); // only contents can be multi-line
QTextLine line = _layout->createLine();
if(line.isValid()) {
line.setLineWidth(width());
- line.setPosition(QPointF(0, fontMetrics()->leading()));
+ line.setPosition(QPointF(0,0));
}
_layout->endLayout();
}
// Now layout
ChatLineModel::WrapList wrapList = data(ChatLineModel::WrapListRole).value<ChatLineModel::WrapList>();
if(!wrapList.count()) return; // empty chatitem
- int wordidx = 0;
- ChatLineModel::Word word = wrapList.at(0);
qreal h = 0;
WrapColumnFinder finder(this);
_layout->beginLayout();
forever {
QTextLine line = _layout->createLine();
- if (!line.isValid())
+ if(!line.isValid())
break;
int col = finder.nextWrapColumn();
line.setNumColumns(col >= 0 ? col - line.textStart() : _layout->text().length());
-
- h += fontMetrics()->leading();
line.setPosition(QPointF(0, h));
- h += line.height();
+ h += line.height() + fontMetrics()->leading();
}
_layout->endLayout();
}
_layout = 0;
}
+// NOTE: This is not the most time-efficient implementation, but it saves space by not caching unnecessary data
+// This is a deliberate trade-off. (-> selectFmt creation, data() call)
void ChatItem::paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget) {
Q_UNUSED(option); Q_UNUSED(widget);
if(!haveLayout()) updateLayout();
- _layout->draw(painter, QPointF(0,0), QVector<QTextLayout::FormatRange>(), boundingRect());
+ painter->setClipRect(boundingRect()); // no idea why QGraphicsItem clipping won't work
+ if(_selectionMode == FullSelection) {
+ painter->save();
+ painter->fillRect(boundingRect(), QApplication::palette().brush(QPalette::Highlight));
+ painter->restore();
+ } // TODO: add selection format here
+ QVector<QTextLayout::FormatRange> formats;
+ if(_selectionMode != NoSelection) {
+ QTextLayout::FormatRange selectFmt;
+ selectFmt.format.setForeground(QApplication::palette().brush(QPalette::HighlightedText));
+ selectFmt.format.setBackground(QApplication::palette().brush(QPalette::Highlight));
+ if(_selectionMode == PartialSelection) {
+ selectFmt.start = qMin(_selectionStart, _selectionEnd);
+ selectFmt.length = qAbs(_selectionStart - _selectionEnd);
+ } else { // FullSelection
+ selectFmt.start = 0;
+ selectFmt.length = data(MessageModel::DisplayRole).toString().length();
+ }
+ formats.append(selectFmt);
+ }
+ _layout->draw(painter, QPointF(0,0), formats, boundingRect());
}
-int ChatItem::posToCursor(const QPointF &pos) {
+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();
return 0;
}
-void ChatItem::clearSelection() {
- if(_selectionStart >= 0) {
- QList<QTextLayout::FormatRange> formats = _layout->additionalFormats();
- formats.removeLast();
- _layout->setAdditionalFormats(formats);
- _selectionStart = -1;
- updateLayout();
- update();
- }
+void ChatItem::setFullSelection() {
+ _selectionMode = FullSelection;
+ update();
}
-void ChatItem::mouseMoveEvent(QGraphicsSceneMouseEvent *event) {
- int selectionEnd = posToCursor(event->pos());
- QList<QTextLayout::FormatRange> formats = _layout->additionalFormats();
- formats.last().start = qMin(_selectionStart, selectionEnd);
- formats.last().length = qMax(_selectionStart, selectionEnd) - formats.last().start;
- _layout->setAdditionalFormats(formats);
- updateLayout();
+void ChatItem::clearSelection() {
+ _selectionMode = NoSelection;
update();
}
void ChatItem::mousePressEvent(QGraphicsSceneMouseEvent *event) {
if(event->buttons() & Qt::LeftButton) {
- if(!haveLayout()) updateLayout();
- chatScene()->setSelectingItem(this);
- _selectionStart = posToCursor(event->pos());
- QList<QTextLayout::FormatRange> formats = _layout->additionalFormats();
- QTextLayout::FormatRange selectFmt;
- QPalette pal = QApplication::palette();
- selectFmt.format.setForeground(pal.brush(QPalette::HighlightedText));
- selectFmt.format.setBackground(pal.brush(QPalette::Highlight));
- selectFmt.length = 0;
- formats.append(selectFmt);
- _layout->setAdditionalFormats(formats);
- updateLayout();
- update();
+ chatScene()->setSelectingItem(this); // removes earlier selection if exists
+ _selectionStart = _selectionEnd = posToCursor(event->pos());
+ _selectionMode = PartialSelection;
event->accept();
} else {
event->ignore();
}
}
+void ChatItem::mouseMoveEvent(QGraphicsSceneMouseEvent *event) {
+ if(contains(event->pos())) {
+ _selectionEnd = posToCursor(event->pos());
+ update();
+ } else {
+ setFullSelection();
+ ungrabMouse();
+ chatScene()->startGlobalSelection(this);
+ }
+}
+
void ChatItem::mouseReleaseEvent(QGraphicsSceneMouseEvent *event) {
- if(_selectionStart >= 0) {
- int selectionEnd = posToCursor(event->pos());
+ if(_selectionMode != NoSelection) {
+ _selectionEnd = posToCursor(event->pos());
QString selection
- = data(MessageModel::DisplayRole).toString().mid(qMin(_selectionStart, selectionEnd), qAbs(_selectionStart - selectionEnd));
+ = data(MessageModel::DisplayRole).toString().mid(qMin(_selectionStart, _selectionEnd), qAbs(_selectionStart - _selectionEnd));
QApplication::clipboard()->setText(selection, QClipboard::Clipboard); // TODO configure where selections should go
event->accept();
} else {
delete layout;
}
-int ChatItem::WrapColumnFinder::nextWrapColumn() {
+qint16 ChatItem::WrapColumnFinder::nextWrapColumn() {
while(wordidx < wrapList.count()) {
w += wrapList.at(wordidx).width;
if(w >= item->width()) {
virtual QVariant data(int role) const;
// returns height
- int setWidth(int width);
+ qreal setWidth(qreal width);
// selection stuff, to be called by the scene
void clearSelection();
void setFullSelection();
+ void continueSelecting();
protected:
virtual void mouseMoveEvent(QGraphicsSceneMouseEvent *event);
virtual void mouseReleaseEvent(QGraphicsSceneMouseEvent *event);
private:
- int posToCursor(const QPointF &pos);
- int heightForWidth(int width);
+ qint16 posToCursor(const QPointF &pos);
+ qreal computeHeight();
QTextLayout *createLayout(QTextOption::WrapMode, Qt::Alignment = Qt::AlignLeft);
+ // internal selection stuff
+ void setSelection(int start, int length);
+
QRectF _boundingRect;
QFontMetricsF *_fontMetrics;
quint8 _lines;
QPersistentModelIndex _index;
- QTextLayout *_layout;
+ QTextLayout * _layout;
QList<quint16> _wrapPositions;
- int _selectionStart;
+
+ enum SelectionMode { NoSelection, PartialSelection, FullSelection };
+ SelectionMode _selectionMode;
+ qint16 _selectionStart, _selectionEnd;
class WrapColumnFinder;
};
WrapColumnFinder(ChatItem *parent);
~WrapColumnFinder();
- int nextWrapColumn();
+ qint16 nextWrapColumn();
private:
ChatItem *item;
QTextLayout *layout;
QTextLine line;
ChatLineModel::WrapList wrapList;
- int wordidx;
- int lastwrapcol;
+ qint16 wordidx;
+ qint16 lastwrapcol;
qreal lastwrappos;
qreal w;
};