// Read a natural
Natural natural(
Optizelle::Messaging const & msg,
Json::Value const & json,
std::string const & name
) {
// Set the error message
std::string const err_msg = "Invalid JSON parameter: "
+ name + " contains an invalid natural.";
// As long as we have an unsigned integer, grab it
if(json.isUInt())
return Natural(Json::Value::UInt64(json.asUInt64()));
// If we have an integer, grab it if it's positive
else if(json.isInt()) {
Integer val(json.asInt64());
if(val>=0)
return Natural(val);
else
msg.error(err_msg);
// Anything else is an error
} else
msg.error(err_msg);
// We should not hit this point
throw;
}
void StrBrowserGraphic::draw (Canvas* c, Graphic* gs) {
Coord xmax, ymax;
CanvasVar* cvar = GetCanvasVar();
if (cvar == nil) {
Natural(xmax, ymax);
} else {
xmax = cvar->xmax();
ymax = cvar->ymax();
}
update(gs);
static Brush* b;
if (b == nil) {
b = new Brush(0xbbbb, 1);
Ref(b);
}
_p->SetBrush(b);
_p->ClearRect(c, 0, 0, xmax, ymax);
_p->Rect(c, 0, 0, xmax, ymax);
_p->Line(c, 0, 0, xmax, ymax);
_p->Line(c, 0, ymax, xmax, 0);
const Font* font = _p->GetFont();
const char* text = GetText();
int w = font->Width(text);
int h = font->Height();
_p->Text(c, text, (xmax+1-w)/2, (ymax+1-h)/2);
}
Natural operator<<(int sh) const {
int n=sh+ndigs;
int d[n];
REP(i,sh) d[i]=0;
REP(i,ndigs) d[i+sh]=digs[i];
return Natural(n,d);
}
Natural::operator bool() const {
if (*this == Natural(0))
return false;
return true;
}
