void Gui::QuantitySpinBox::onChange() {
Q_ASSERT(isBound());
if (getExpression()) {
std::unique_ptr<Expression> result(getExpression()->eval());
NumberExpression * value = freecad_dynamic_cast<NumberExpression>(result.get());
if (value) {
std::stringstream s;
s << value->getValue();
lineEdit()->setText(value->getQuantity().getUserString());
setReadOnly(true);
QPixmap pixmap = getIcon(":/icons/bound-expression.svg", QSize(iconHeight, iconHeight));
iconLabel->setPixmap(pixmap);
QPalette p(lineEdit()->palette());
p.setColor(QPalette::Text, Qt::lightGray);
lineEdit()->setPalette(p);
}
iconLabel->setToolTip(QString());
setToolTip(Base::Tools::fromStdString(getExpression()->toString()));
}
else {
setReadOnly(false);
QPixmap pixmap = getIcon(":/icons/bound-expression-unset.svg", QSize(iconHeight, iconHeight));
iconLabel->setPixmap(pixmap);
QPalette p(lineEdit()->palette());
p.setColor(QPalette::Active, QPalette::Text, defaultPalette.color(QPalette::Text));
lineEdit()->setPalette(p);
iconLabel->setToolTip(QString());
}
iconLabel->setToolTip(QString());
}
void DlgExpressionInput::textChanged(const QString &text)
{
try {
//resize the input field according to text size
QFontMetrics fm(ui->expression->font());
int width = fm.width(text) + 15;
if (width < minimumWidth)
ui->expression->setMinimumWidth(minimumWidth);
else
ui->expression->setMinimumWidth(width);
if(this->width() < ui->expression->minimumWidth())
setMinimumWidth(ui->expression->minimumWidth());
//now handle expression
boost::shared_ptr<Expression> expr(ExpressionParser::parse(path.getDocumentObject(), text.toUtf8().constData()));
if (expr) {
std::string error = path.getDocumentObject()->ExpressionEngine.validateExpression(path, expr);
if (error.size() > 0)
throw Base::Exception(error.c_str());
std::unique_ptr<Expression> result(expr->eval());
expression = expr;
ui->okBtn->setEnabled(true);
ui->msg->clear();
NumberExpression * n = Base::freecad_dynamic_cast<NumberExpression>(result.get());
if (n) {
Base::Quantity value = n->getQuantity();
if (!value.getUnit().isEmpty() && value.getUnit() != impliedUnit)
throw Base::Exception("Unit mismatch between result and required unit");
value.setUnit(impliedUnit);
ui->msg->setText(value.getUserString());
}
else
ui->msg->setText(Base::Tools::fromStdString(result->toString()));
//set default palette as we may have read text right now
ui->msg->setPalette(ui->okBtn->palette());
}
}
catch (Base::Exception & e) {
ui->msg->setText(QString::fromUtf8(e.what()));
QPalette p(ui->msg->palette());
p.setColor(QPalette::WindowText, Qt::red);
ui->msg->setPalette(p);
ui->okBtn->setDisabled(true);
}
}
void Gui::QuantitySpinBox::setExpression(boost::shared_ptr<Expression> expr)
{
Q_ASSERT(isBound());
try {
ExpressionBinding::setExpression(expr);
if (getExpression()) {
std::auto_ptr<Expression> result(getExpression()->eval());
NumberExpression * value = freecad_dynamic_cast<NumberExpression>(result.get());
if (value) {
updateText(value->getQuantity());
setReadOnly(true);
iconLabel->setPixmap(getIcon(":/icons/bound-expression.svg", QSize(iconHeight, iconHeight)));
QPalette p(lineEdit()->palette());
p.setColor(QPalette::Text, Qt::lightGray);
lineEdit()->setPalette(p);
}
setToolTip(Base::Tools::fromStdString(getExpression()->toString()));
}
else {
setReadOnly(false);
iconLabel->setPixmap(getIcon(":/icons/bound-expression-unset.svg", QSize(iconHeight, iconHeight)));
QPalette p(lineEdit()->palette());
p.setColor(QPalette::Active, QPalette::Text, defaultPalette.color(QPalette::Text));
lineEdit()->setPalette(p);
}
iconLabel->setToolTip(QString());
}
catch (const Base::Exception & e) {
setReadOnly(true);
QPalette p(lineEdit()->palette());
p.setColor(QPalette::Active, QPalette::Text, Qt::red);
lineEdit()->setPalette(p);
iconLabel->setToolTip(QString::fromAscii(e.what()));
}
}
UnitExpression * parseUnit(const App::DocumentObject *owner, const char* buffer)
{
// parse from buffer
ExpressionParser::YY_BUFFER_STATE my_string_buffer = ExpressionParser_scan_string (buffer);
initParser(owner);
// run the parser
int result = ExpressionParser::ExpressionParser_yyparse ();
// free the scan buffer
ExpressionParser::ExpressionParser_delete_buffer (my_string_buffer);
if (result != 0)
throw Base::Exception("Failed to parse expression.");
if (ScanResult == 0)
throw Base::Exception("Unknown error in expression");
// Simplify expression
Expression * simplified = ScanResult->simplify();
delete ScanResult;
if (unitExpression) {
NumberExpression * num = freecad_dynamic_cast<NumberExpression>(simplified);
if (num) {
simplified = new UnitExpression(num->getOwner(), num->getQuantity());
delete num;
}
return freecad_dynamic_cast<UnitExpression>(simplified);
}
else {
delete simplified;
throw Expression::Exception("Expression is not a unit.");
return 0;
}
}