void QmitkTransferFunctionCanvas::keyPressEvent(QKeyEvent *e)
{
if (m_GrabbedHandle == -1)
return;
switch (e->key())
{
case Qt::Key_Delete:
if (this->GetFunctionSize() > 1)
{
this->RemoveFunctionPoint(GetFunctionX(m_GrabbedHandle));
m_GrabbedHandle = -1;
}
break;
case Qt::Key_Left:
this->MoveFunctionPoint(
m_GrabbedHandle,
ValidateCoord(std::make_pair(GetFunctionX(m_GrabbedHandle) - 1, GetFunctionY(m_GrabbedHandle))));
break;
case Qt::Key_Right:
this->MoveFunctionPoint(
m_GrabbedHandle,
ValidateCoord(std::make_pair(GetFunctionX(m_GrabbedHandle) + 1, GetFunctionY(m_GrabbedHandle))));
break;
case Qt::Key_Up:
this->MoveFunctionPoint(
m_GrabbedHandle,
ValidateCoord(std::make_pair(GetFunctionX(m_GrabbedHandle), GetFunctionY(m_GrabbedHandle) + 0.001)));
break;
case Qt::Key_Down:
this->MoveFunctionPoint(
m_GrabbedHandle,
ValidateCoord(std::make_pair(GetFunctionX(m_GrabbedHandle), GetFunctionY(m_GrabbedHandle) - 0.001)));
break;
}
update();
mitk::RenderingManager::GetInstance()->RequestUpdateAll();
}
void QmitkPiecewiseFunctionCanvas::paintEvent(QPaintEvent*)
{
QPainter painter(this);
PaintHistogram(painter);
if (m_Title.size()>0)
{
painter.setPen(Qt::black);
painter.drawText(QPoint(11,21),m_Title);
painter.setPen(Qt::white);
painter.drawText(QPoint(10,20),m_Title);
}
{
QString qs_min = QString::number( m_Min, 'g', 4 );
QString qs_max = QString::number( m_Max, 'g', 4 );
QRect qr_min = painter.fontMetrics().boundingRect( qs_min );
QRect qr_max = painter.fontMetrics().boundingRect( qs_max );
int y,x;
y=this->contentsRect().height()-qr_min.height()+5;
x=10;
// Fill the tf presets in the generator widget
painter.setPen(Qt::black);
painter.drawText(QPoint(x+1,y+1),qs_min);
painter.setPen(Qt::white);
painter.drawText(QPoint(x ,y ),qs_min);
y=this->contentsRect().height()-qr_max.height()+5;
x=this->contentsRect().width()-qr_max.width()-6;
painter.setPen(Qt::black);
painter.drawText(QPoint(x,y+1),qs_max);
painter.setPen(Qt::white);
painter.drawText(QPoint(x,y ),qs_max);
}
painter.setPen(Qt::gray);
QRect contentsRect = this->contentsRect();
painter.drawRect(0, 0, contentsRect.width()+1, contentsRect.height()+1);
if (m_PiecewiseFunction && this->isEnabled())
{
double* dp = m_PiecewiseFunction->GetDataPointer();
// Render lines
painter.setPen(Qt::black);
for (int i = -1; i < m_PiecewiseFunction->GetSize(); i++)
{
std::pair<int,int> left;
std::pair<int,int> right;
if(i < 0)
left = this->FunctionToCanvas(std::make_pair(-32768, dp[0 * 2 + 1]));
else
left = this->FunctionToCanvas(std::make_pair(dp[i * 2], dp[i * 2 + 1]));
if(i+1 >= m_PiecewiseFunction->GetSize())
right = this->FunctionToCanvas(std::make_pair(32768, dp[(i ) * 2 + 1]));
else
right = this->FunctionToCanvas(std::make_pair(dp[(i+1) * 2], dp[(i+1) * 2 + 1]));
painter.drawLine(left.first, left.second, right.first, right.second);
}
// Render Points
for (int i = 0; i < m_PiecewiseFunction->GetSize(); i++)
{
std::pair<int,int> point = this->FunctionToCanvas(std::make_pair(
dp[i * 2], dp[i * 2 + 1]));
if (i == m_GrabbedHandle)
{
painter.setBrush(QBrush(Qt::red));
if (m_LineEditAvailable)
{
int xCursor = m_XEdit->cursorPosition();
int yCursor = m_YEdit->cursorPosition();
m_XEdit->setText(QString::number(GetFunctionX(m_GrabbedHandle), 'g', 4));
m_YEdit->setText(QString::number(GetFunctionY(m_GrabbedHandle), 'g', 4));
m_XEdit->setCursorPosition( xCursor );
m_YEdit->setCursorPosition( yCursor );
}
}
else
{
painter.setBrush(QBrush(Qt::green));
}
painter.drawEllipse(point.first - 4, point.second - 4, 8, 8);
}
painter.setBrush(Qt::NoBrush);
}
}
