12 replies to this topic

[jaiii]

Hi,

I like write Tedit descendant who not return result as Text (AnsiString) but return result as
boolean expression for example (I > J)...
How can I do this or where can are I find this TEdit ?

Thank very much.

[WingedPanther]

Can you clarify what you're looking for here?

[dargueta]

Ok, so if I'm interpreting this correctly, you want the TEdit object to evaluate a Boolean expression typed into it and return the result?

[jaiii]

Yes exact.

By.

[dargueta]

Is it going to be able to evaluate variables in your program, or just numeric constants?

[jaiii]

to evaluate variables in my program in run-time

[dargueta]

Uh...all I can say is "good luck." That may be possible in scripted languages, but you're going to have to map all of your variables onto strings in a map, find these variables in the map, evaluate them, write them back...

[jaiii]

Thaknkx I try it may be.

[dargueta]

#include <map>

std::map<const char*, int*> int_vars;

int a, b, c;
int_vars["a"] = &a;
int_vars["b"] = &b;
int_vars["c"] = &c;

// Now parse the text and match the variable names to their values

[jaiii]

Thank very much fo help.

[dargueta]

No problem. If you have any more questions, I'll be around.

[jaiii]

Hi,

I write my own component and need help with this.

In component I have
__published:
__property TDefFileld Items[int Index] ={read=GetF,write=SetF}
where TDefField is:

class TDefField : public TPersistent
{
public:
AnsiString FName;
AnsiString FType; // bool byte word integer ...
Byte FSyze;
Byte FDeci;
};

TdefField * __fasctcall GetF(int Index)
{
return Items[Index];
}

void __fascall SetF(int Index,TDefField *DF)
{
Items[Index]=DF;
}


How can I write property editor for this property ?

Thank very much.