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Jochanan
Guest
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 Posted: Mon May 30, 2005 6:21 am Post subject: TListBox type speed for selection of items |
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Hi,
Is there a way to cotrol the type speed while looking up items in the
TListBox.
the listbox is looking for the next word wile im stil typing my privius one.
Regards
jvdn.
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JD
Guest
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| Posted: Tue May 31, 2005 6:40 am Post subject: Re: TListBox type speed for selection of items |
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"Jochanan" <non (AT) nomail (DOT) com> wrote:
| Quote: |
[...] the listbox is looking for the next word wile im stil
typing my privius one.
|
The only thing that you can do is intercept the key strokes
before they make their way to the TTreeView. The first chance
that you have to see a keypress is in the TApplication::OnMessage
event. From here, you can monitor all Window messages sent to
your application and change them as needed.
//--- in the header -------------------------------------------
private: // User declarations
void __fastcall MyAppMessage( TMsg&, bool& );
public: // User declarations
__fastcall ~TForm1();
//--- in the unit ---------------------------------------------
__fastcall TForm1::TForm1(TComponent* Owner) : TForm(Owner)
{
Application->OnMessage = MyAppMessage;
}
//-------------------------------------------------------------
__fastcall TForm1::~TForm1()
{
Application->OnMessage = NULL;
}
//-------------------------------------------------------------
void __fastcall TForm1::MyAppMessage( TMsg &Msg, bool &Handled )
{
if( Msg.message == WM_KEYDOWN || Msg.message == WM_KEYUP )
{
if( Screen->ActiveControl == SomeForm->TreeView1 )
{
if( Msg.message == WM_KEYDOWN )
{
// buffer the keystroke found in Msg.wParam
}
Msg.wParam = NULL;
}
}
}
//-------------------------------------------------------------
Your problem now becomes how to know when to do a lookup. Look
at starting and resetting a TTimer when the WM_KEYDOWN is
detected for the control.
~ JD
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