Capturing paste at the form level, possibly bypassing components

[Tommi Prami 159]

Hello,

I need either VLC / WinMessage / WinAPI solution to this. 

Current (very old) implementation uses Forms KeyPreview set to true. Then  on KeyUp event paste key kombinations will invoke code that will get data from keyboard, and Key is set to zero.

It mostly works, but sometimes edit controls are faster to capture the paste. Would need bit more robust version for this.

-Tee-

Edited September 25 by Tommi Prami

[dwrbudr 12]

Drop TApplicationEvents component on the form and implement the OnMessage event handler.

 

procedure TMainForm.ApplicationEventsMessage(var Msg: tagMSG; var Handled: boolean);
var Key: Word;
    ShiftState: TShiftState;
    ctrl: TWinControl;
begin
    case Msg.Message of
    WM_KEYDOWN:
    begin
        Key := Msg.wParam;
        ShiftState := KeyDataToShiftState(Msg.lParam);

        if (ssCtrl in ShiftState) and (Key = Ord('V')) then
        begin
            ctrl := FindControl(Msg.hwnd);
            //do whatever you need to do
            Handled := true;
        end;
    end;
    end;
end;

 

Edited September 25 by dwrbudr

[Tommi Prami 159]

17 minutes ago, dwrbudr said:

Drop TApplicationEvents component on the form and implement the OnMessage event handler.

 

procedure TMainForm.ApplicationEventsMessage(var Msg: tagMSG; var Handled: boolean);
var Key: Word;
    ShiftState: TShiftState;
    ctrl: TWinControl;
begin
    case Msg.Message of
    WM_KEYDOWN:
    begin
        Key := Msg.wParam;
        ShiftState := KeyDataToShiftState(Msg.lParam);

        if (ssCtrl in ShiftState) and (Key = Ord('V')) then
        begin
            ctrl := FindControl(Msg.hwnd);
            //do whatever you need to do
            Handled := true;
        end;
    end;
    end;
end;

 

Nice...
 

ctrl := FindControl(Msg.hwnd); // <- could you tell me what is this for?

Edited September 25 by Tommi Prami
Formatting

[dwrbudr 12]

If you want to do specific actions based on the VCL control that was about to receive the message, like a TTreeView, TEdit, etc.