/*!
Calculate the bounding rectangle for the tracker text
from the current position of the tracker
\param font Font of the tracker text
\return Bounding rectangle of the tracker text
\sa trackerPosition()
*/
QRect QwtPicker::trackerRect( const QFont &font ) const
{
if ( trackerMode() == AlwaysOff ||
( trackerMode() == ActiveOnly && !isActive() ) )
{
return QRect();
}
if ( d_data->trackerPosition.x() < 0 || d_data->trackerPosition.y() < 0 )
return QRect();
QwtText text = trackerText( d_data->trackerPosition );
if ( text.isEmpty() )
return QRect();
const QSizeF textSize = text.textSize( font );
QRect textRect( 0, 0, qCeil( textSize.width() ), qCeil( textSize.height() ) );
const QPoint &pos = d_data->trackerPosition;
int alignment = 0;
if ( isActive() && d_data->pickedPoints.count() > 1
&& rubberBand() != NoRubberBand )
{
const QPoint last =
d_data->pickedPoints[int( d_data->pickedPoints.count() ) - 2];
alignment |= ( pos.x() >= last.x() ) ? Qt::AlignRight : Qt::AlignLeft;
alignment |= ( pos.y() > last.y() ) ? Qt::AlignBottom : Qt::AlignTop;
}
else
alignment = Qt::AlignTop | Qt::AlignRight;
const int margin = 5;
int x = pos.x();
if ( alignment & Qt::AlignLeft )
x -= textRect.width() + margin;
else if ( alignment & Qt::AlignRight )
x += margin;
int y = pos.y();
if ( alignment & Qt::AlignBottom )
y += margin;
else if ( alignment & Qt::AlignTop )
y -= textRect.height() + margin;
textRect.moveTopLeft( QPoint( x, y ) );
int right = qMin( textRect.right(), pickRect().right() - margin );
int bottom = qMin( textRect.bottom(), pickRect().bottom() - margin );
textRect.moveBottomRight( QPoint( right, bottom ) );
int left = qMax( textRect.left(), pickRect().left() + margin );
int top = qMax( textRect.top(), pickRect().top() + margin );
textRect.moveTopLeft( QPoint( left, top ) );
return textRect;
}
/*!
Handle a wheel event for the observed widget.
Move the last point of the selection in case of isActive() == true
\sa eventFilter(), widgetMousePressEvent(), widgetMouseReleaseEvent(),
widgetMouseDoubleClickEvent(), widgetMouseMoveEvent(),
widgetKeyPressEvent(), widgetKeyReleaseEvent()
*/
void QwtPicker::widgetWheelEvent(QWheelEvent *e)
{
if ( pickRect().contains(e->pos()) )
d_data->labelPosition = e->pos();
else
d_data->labelPosition = QPoint(-1, -1);
updateDisplay();
transition(e);
}
/*!
Handle a wheel event for the observed widget.
Move the last point of the selection in case of isActive() == true
\param wheelEvent Wheel event
\sa eventFilter(), widgetMousePressEvent(), widgetMouseReleaseEvent(),
widgetMouseDoubleClickEvent(), widgetMouseMoveEvent(),
widgetKeyPressEvent(), widgetKeyReleaseEvent()
*/
void QwtPicker::widgetWheelEvent( QWheelEvent *wheelEvent )
{
if ( pickRect().contains( wheelEvent->pos() ) )
d_data->trackerPosition = wheelEvent->pos();
else
d_data->trackerPosition = QPoint( -1, -1 );
updateDisplay();
transition( wheelEvent );
}
/*!
Handle a mouse move event for the observed widget.
Move the last point of the selection in case of isActive() == true
\sa eventFilter(), widgetMousePressEvent(), widgetMouseReleaseEvent(),
widgetMouseDoubleClickEvent(),
widgetWheelEvent(), widgetKeyPressEvent(), widgetKeyReleaseEvent()
*/
void QwtPicker::widgetMouseMoveEvent(QMouseEvent *e)
{
if ( pickRect().contains(e->pos()) )
d_data->labelPosition = e->pos();
else
d_data->labelPosition = QPoint(-1, -1);
if ( !isActive() )
updateDisplay();
transition(e);
}
/*!
Handle a mouse move event for the observed widget.
\param mouseEvent Mouse event
\sa eventFilter(), widgetMousePressEvent(), widgetMouseReleaseEvent(),
widgetMouseDoubleClickEvent(),
widgetWheelEvent(), widgetKeyPressEvent(), widgetKeyReleaseEvent()
*/
void QwtPicker::widgetMouseMoveEvent( QMouseEvent *mouseEvent )
{
if ( pickRect().contains( mouseEvent->pos() ) )
d_data->trackerPosition = mouseEvent->pos();
else
d_data->trackerPosition = QPoint( -1, -1 );
if ( !isActive() )
updateDisplay();
transition( mouseEvent );
}
/*!
Handle a key press event for the observed widget.
Selections can be completely done by the keyboard. The arrow keys
move the cursor, the abort key aborts a selection. All other keys
are handled by the current state machine.
\sa QwtPicker, selectionFlags()
\sa eventFilter(), widgetMousePressEvent(), widgetMouseReleaseEvent(),
widgetMouseDoubleClickEvent(), widgetMouseMoveEvent(),
widgetWheelEvent(), widgetKeyReleaseEvent(), stateMachine(),
QwtEventPattern::KeyPatternCode
*/
void QwtPicker::widgetKeyPressEvent(QKeyEvent *ke)
{
int dx = 0;
int dy = 0;
int offset = 1;
if ( ke->isAutoRepeat() )
offset = 5;
if ( keyMatch(KeyLeft, ke) )
dx = -offset;
else if ( keyMatch(KeyRight, ke) )
dx = offset;
else if ( keyMatch(KeyUp, ke) )
dy = -offset;
else if ( keyMatch(KeyDown, ke) )
dy = offset;
else if ( keyMatch(KeyAbort, ke) )
{
if ( d_data->stateMachine )
d_data->stateMachine->reset();
if (isActive())
end(false);
}
else
transition(ke);
if ( dx != 0 || dy != 0 )
{
const QRect rect = pickRect();
const QPoint pos = parentWidget()->mapFromGlobal(QCursor::pos());
int x = pos.x() + dx;
x = qwtMax(rect.left(), x);
x = qwtMin(rect.right(), x);
int y = pos.y() + dy;
y = qwtMax(rect.top(), y);
y = qwtMin(rect.bottom(), y);
QCursor::setPos(parentWidget()->mapToGlobal(QPoint(x, y)));
}
}
void QwtPicker::drawRubberBand(QPainter *painter) const
{
if ( !isActive() || rubberBand() == NoRubberBand ||
rubberBandPen().style() == Qt::NoPen )
{
return;
}
const QRect &pRect = pickRect();
const SelectedPoints &pa = d_data->selection;
if ( selectionFlags() & PointSelection )
{
if ( pa.count() < 1 )
return;
const QPoint pos = pa[0];
switch(rubberBand())
{
case VLineRubberBand:
QwtPainter::drawLine(painter, pos.x(),
pRect.top(), pos.x(), pRect.bottom());
break;
case HLineRubberBand:
QwtPainter::drawLine(painter, pRect.left(),
pos.y(), pRect.right(), pos.y());
break;
case CrossRubberBand:
QwtPainter::drawLine(painter, pos.x(),
pRect.top(), pos.x(), pRect.bottom());
QwtPainter::drawLine(painter, pRect.left(),
pos.y(), pRect.right(), pos.y());
break;
default:
break;
}
}
else if ( selectionFlags() & RectSelection )
{
if ( pa.count() < 2 )
return;
QPoint p1 = pa[0];
QPoint p2 = pa[int(pa.count() - 1)];
if ( selectionFlags() & CenterToCorner )
{
p1.setX(p1.x() - (p2.x() - p1.x()));
p1.setY(p1.y() - (p2.y() - p1.y()));
}
else if ( selectionFlags() & CenterToRadius )
{
const int radius = qwtMax(qwtAbs(p2.x() - p1.x()),
qwtAbs(p2.y() - p1.y()));
p2.setX(p1.x() + radius);
p2.setY(p1.y() + radius);
p1.setX(p1.x() - radius);
p1.setY(p1.y() - radius);
}
#if QT_VERSION < 0x040000
const QRect rect = QRect(p1, p2).normalize();
#else
const QRect rect = QRect(p1, p2).normalized();
#endif
switch(rubberBand())
{
case EllipseRubberBand:
QwtPainter::drawEllipse(painter, rect);
break;
case RectRubberBand:
QwtPainter::drawRect(painter, rect);
break;
default:
break;
}
}
else if ( selectionFlags() & PolygonSelection )
{
if ( rubberBand() == PolygonRubberBand )
painter->drawPolyline(pa);
}
}
void QwtPicker::drawRubberBand( QPainter *painter ) const
{
if ( !isActive() || rubberBand() == NoRubberBand ||
rubberBandPen().style() == Qt::NoPen )
{
return;
}
const QRect &pRect = pickRect();
const QPolygon pa = adjustedPoints( d_data->pickedPoints );
QwtPickerMachine::SelectionType selectionType =
QwtPickerMachine::NoSelection;
if ( d_data->stateMachine )
selectionType = d_data->stateMachine->selectionType();
switch ( selectionType )
{
case QwtPickerMachine::NoSelection:
case QwtPickerMachine::PointSelection:
{
if ( pa.count() < 1 )
return;
const QPoint pos = pa[0];
switch ( rubberBand() )
{
case VLineRubberBand:
QwtPainter::drawLine( painter, pos.x(),
pRect.top(), pos.x(), pRect.bottom() );
break;
case HLineRubberBand:
QwtPainter::drawLine( painter, pRect.left(),
pos.y(), pRect.right(), pos.y() );
break;
case CrossRubberBand:
QwtPainter::drawLine( painter, pos.x(),
pRect.top(), pos.x(), pRect.bottom() );
QwtPainter::drawLine( painter, pRect.left(),
pos.y(), pRect.right(), pos.y() );
break;
default:
break;
}
break;
}
case QwtPickerMachine::RectSelection:
{
if ( pa.count() < 2 )
return;
const QPoint p1 = pa[0];
const QPoint p2 = pa[int( pa.count() - 1 )];
const QRect rect = QRect( p1, p2 ).normalized();
switch ( rubberBand() )
{
case EllipseRubberBand:
QwtPainter::drawEllipse( painter, rect );
break;
case RectRubberBand:
QwtPainter::drawRect( painter, rect );
break;
default:
break;
}
break;
}
case QwtPickerMachine::PolygonSelection:
{
if ( rubberBand() == PolygonRubberBand )
painter->drawPolyline( pa );
break;
}
default:
break;
}
}