Title: How to correct badly inserted characters in edit to right numbers ?
Question: How to correct badly inserted numbers in edit to right numbers ? (if you set incorrectly keyboard language, for example Czech instead of English)
- it also refuse to write any letters into edit (only numbers are alowed)
- it also delete that annoing zero number in front of inserted number if you had cursor on the right side before insertion
Answer:
Add this procedure to your program:
procedure ChangeOrFilterInputKeysInEdit(a: TObject; var k: Char);
begin
if k in ['¨¦'] then k := '0';
if k in ['+'] then k := '1';
if k in ['¨§'] then k := '2';
if k in ['?'] then k := '3';
if k in ['?'] then k := '4';
if k in ['?'] then k := '5';
if k in ['?'] then k := '6';
if k in ['y'] then k := '7';
if k in ['¨¢'] then k := '8';
if k in ['¨ª'] then k := '9';
if ((k in ['0'..'9']) or (k = char(08))) // "char(08)" is backspace
then
begin
if (a as TEdit).Text = '0' then (a as TEdit).Text := '';
end
else
begin
k := #0;
end;
end;
How to use it:
add OnKeyPress event for example to edit1 like this:
(and insert ChangeOrFilterInputKeysInEdit procedure into it)
procedure TForm1.Edit1KeyPress(Sender: TObject; var Key: Char);
begin
ChangeOrFilterInputKeysInEdit(Sender as TEdit, Key);
end;
ok that all !
note: this work only with Czech keyboard language, if you want it in another language, just set the wrong keyboard language (throught Alt - Shift) and press numbers 0 - 9 and write this characters into ['¨¦'] part of code, for example in Czech keyboard number 1 on keyboard mean character ¨¦ on screen.
Tested in Delphi 2007, it works perfectly !