Helps with TGrid

Question

I'm a newbie in C++ Builder and really need some help. In my work, we have to use C++ Builder and I can't find very much documentation about it.

What I want to do is to insert a new row with some data in each column each time the user press the Insert key. There are 20 rows in total in my TGrid: 1 TCheckColumn and 19 TStringColumn.

I don't know how to do it exactly. First, here is the code I already wrote when someone enter the insert key:

void __fastcall TForm2::Grid1KeyDown(TObject *Sender, WORD &Key, System::WideChar &KeyChar,
        TShiftState Shift)
{
    switch(Key)
    {
        case VK_INSERT:
            if(Grid1->RowCount>MAXTask){}else
            {
                Label1->Text  = "number Task: "+IntToStr(++nmbertask);
                Grid1->RowCount++;
            }
            break;
    }
}

Here is the Grid1GetValue() and Grid1SetValue() code:

void __fastcall TForm2::Grid1GetValue(TObject *Sender, const int Col, const int Row,
    TValue &Value)
{
    switch(Col)
    {
        case 0:
            Value = A[Col][Row]; break;
        case 1:
            Value = A[Col][Row]; break;
        case 2:
            Value = A[Col][Row]; break;
        case 3:
            Value = A[Col][Row]; break;
        case 4:
            Value = A[Col][Row]; break;
        case 5:
            Value = A[Col][Row]; break;
        case 6:
            Value = A[Col][Row]; break;
        case 7:
            Value = A[Col][Row]; break;
        case 8:
            Value = A[Col][Row]; break;
        case 9:
            Value = A[Col][Row];break;
        case 10:
            Value = A[Col][Row];break;
        case 11:
            Value = A[Col][Row];break;
        case 12:
            Value = A[Col][Row];break;
        case 13:
            Value = A[Col][Row];break;
        case 14:
            Value = A[Col][Row];break;
        case 15:
            Value = A[Col][Row];break;
        case 16:
            Value = A[Col][Row];break;
        case 17:
            Value = A[Col][Row];break;
        case 18:
            Value = A[Col][Row]; break;
        case 19:
            Value = A[Col][Row];break;
    }
}

void __fastcall TForm2::Grid1SetValue(TObject *Sender, const int Col, const int Row,
    const TValue &Value)
{
    switch(Col)
    {
        case 0:
            A[Col][Row] = Value; break;
        case 1:
            A[Col][Row] = Value; break;
        case 2:
            A[Col][Row] = Value; break;
        case 3:
            A[Col][Row] = Value; break;
        case 4:
            A[Col][Row] = Value; break;
        case 5:
            A[Col][Row] = Value; break;
        case 6:
            A[Col][Row] = Value; break;
        case 7:
            A[Col][Row] = Value; break;
        case 8:
            A[Col][Row] = Value; break;
        case 9:
            A[Col][Row] = Value; break;
        case 10:
            A[Col][Row] = Value; break;
        case 11:
            A[Col][Row] = Value; break;
        case 12:
            A[Col][Row] = Value; break;
        case 13:
            A[Col][Row] = Value; break;
        case 14:
            A[Col][Row] = Value; break;
        case 15:
            A[Col][Row] = Value; break;
        case 16:
            A[Col][Row] = Value; break;
        case 17:
            A[Col][Row] = Value; break;
        case 18:
            A[Col][Row] = Value; break;
        case 19:
            A[Col][Row] = Value; break;
    }
}

This is what I've done so far. I've never developed in C++ Builder, so can you help me please? I'm not really looking for a written solution, I'm really looking for an indication of where to look for a solution.

If I'm not clear, please indicate it so I can give more information. If you also have a good site with good documentation about C++ Builder, please indicate it to me. English is not my native language but I will do my best.

Answer 1

You can find the TGrid documentation on Embarcadero's DocWiki. Look at the 'Methods' page to figure out how to insert and remove elements in your TGrid. There are two methods that can help you: InsertComponent() and `InsertObject().

Also, in your Grid1GetValue() and Grid1SetValue() methods, you are using a switch statement. In all those cases you are doing the same job :

Value = A[Col][Row];break;

So, instead of using a switch, you can simply call one time Value = A[Col][Row]; and it will do the same result.

I hope my answer can help you. At least I answered what I understood from your question.