VirtualArray
Using ArrayCtrl without storing any real data to it
main.cpp
#include <CtrlLib/CtrlLib.h>
using namespace Upp;
static String sNumberAsText(int number)
{
static const char * const digits[20] = {
"", "one", "two", "three", "four", "five", "six", "seven", "eight", "nine",
"ten", "eleven", "twelve", "thirteen", "fourteen", "fifteen", "sixteen",
"seventeen", "eighteen", "nineteen"
};
static const char * const tens[10] = {
"", "ten", "twenty", "thirty", "fourty", "fifty", "sixty", "seventy", "eighty", "ninety"
};
if(number < 20)
return digits[number];
if(number < 100)
return tens[number / 10] + String(" ") + sNumberAsText(number % 10);
if(number < 1000)
return digits[number / 100] + String(" hundred ") + sNumberAsText(number % 100);
if(number < 1000000)
return sNumberAsText(number / 1000) + " thousand, " + sNumberAsText(number % 1000);
return "";
}
struct NumberToText : public Convert {
virtual Value Format(const Value& q) const {
int n = q;
return n == 0 ? String("zero") : sNumberAsText(n);
}
};
GUI_APP_MAIN
{
ArrayCtrl array;
array.AddRowNumColumn("number", 20);
array.AddRowNumColumn("text", 80).SetConvert(Single<NumberToText>());
array.SetVirtualCount(900000);
TopWindow win;
win.Zoomable().Sizeable();
win.Add(array.SizePos());
win.Run();
}
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