DocumentModelDigitizeCurve::DocumentModelDigitizeCurve(const DocumentModelDigitizeCurve &other) :
m_cursorStandardCross (other.cursorStandardCross()),
m_cursorInnerRadius (other.cursorInnerRadius()),
m_cursorLineWidth (other.cursorLineWidth()),
m_cursorSize (other.cursorSize ())
{
}
QCursor CursorFactory::generate (const DocumentModelDigitizeCurve &modelDigitizeCurve) const
{
// To prevent hideous drawing errors when the line is thicker, we
// leave a padding region around the outside equal in size to the line width
int innerRadius = modelDigitizeCurve.cursorInnerRadius();
int size = CursorSizeToPixels (modelDigitizeCurve.cursorSize());
int halfSize = size / 2;
int lineWidth = modelDigitizeCurve.cursorLineWidth();
int halfLineWidth = lineWidth / 2;
if (modelDigitizeCurve.cursorStandardCross()) {
// Standard cursor
return QCursor (Qt::CrossCursor);
} else {
// Custom cursor
const int BACKGROUND_COLOR = Qt::white, FOREGROUND_COLOR = Qt::black;
// Cursor is created with pic image (which has nontrivial pen) masked by picMask image
// (which has single color pen)
QPixmap picMask (size,
size);
QPainter picMaskPaint (&picMask);
picMask.fill (QColor (BACKGROUND_COLOR));
QPen pen (QBrush (FOREGROUND_COLOR),
modelDigitizeCurve.cursorLineWidth());
picMaskPaint.setPen (pen);
picMaskPaint.drawLine (QPointF (halfSize,
halfSize - innerRadius - halfLineWidth),
QPointF (halfSize,
lineWidth)); // Up
picMaskPaint.drawLine (QPointF (halfSize - innerRadius - halfLineWidth,
halfSize),
QPointF (lineWidth,
halfSize)); // Left
picMaskPaint.drawLine (QPointF (halfSize,
halfSize + innerRadius + halfLineWidth),
QPointF (halfSize,
size - 1 - lineWidth)); // Down
picMaskPaint.drawLine (QPointF (halfSize + innerRadius + halfLineWidth,
halfSize),
QPointF (size - 1 - lineWidth,
halfSize)); // Right
QPixmap pic (size,
size);
pic.fill (QColor (FOREGROUND_COLOR));
return QCursor (pic.createMaskFromColor(QColor (BACKGROUND_COLOR)),
picMask.createMaskFromColor(QColor (BACKGROUND_COLOR)));
}
}
