[El Sanchez]

Johny777, нужно рассчитывать интервал таймера и сдвиг контрола в зависимости от размеров самого контрола. Если у меня, к примеру, панель высотой в 2 пикселя и надо все это дела выкатить/закатить за, скажем, 1 сек., то фиксированный сдвиг в 3 пикселя и фиксированный интервал таймера в 5 мс не катят. Убил полдня на алгоритм, вот вариант.

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Код:

[code]
var
    SettingPanel: TPanel;
    hBtn: TButton;
    //iStartTime: Integer; //debug
    iTimer, iRollInfo: Integer;

function SetTimer(hWnd, nIDEvent, uElapse, lpTimerFunc: LongWord): LongWord; external 'SetTimer@user32.dll stdcall';
function KillTimer(hWnd, nIDEvent: LongWord): LongWord; external 'KillTimer@user32.dll stdcall';
//function GetTickCount: DWORD; external 'GetTickCount@kernel32.dll stdcall'; //debug


procedure TimerProc(hwnd: HWND; uMsg: UINT; idEvent: UINT_PTR; dwTime: DWORD);
var
    iLen, iStep: Integer;
begin
    iLen := iRollInfo and $FFFF;
    iStep := (iRollInfo and $FF0000) shr $10;
    case iRollInfo shr $18 of
        $0: begin
                if SettingPanel.Left >= -iStep then
                begin
                    KillTimer(0, iTimer);
                    hBtn.Enabled := True;
                end;
                SettingPanel.Left := SettingPanel.Left + iStep;
                //WizardForm.Caption := 'time: ' + IntToStr(dwTime-iStartTime) + '; length: ' + IntToStr(SettingPanel.Left); //debug
            end;
        $1: begin
                if SettingPanel.Left <= -iLen + iStep then
                begin
                    KillTimer(0, iTimer);
                    hBtn.Enabled := True;
                end;
                SettingPanel.Left := SettingPanel.Left - iStep;
                //WizardForm.Caption := 'time: ' + IntToStr(dwTime-iStartTime) + '; length: ' + IntToStr(SettingPanel.Left); //debug
            end;
        $2: begin
                if SettingPanel.Top >= -iStep then
                begin
                    KillTimer(0, iTimer);
                    hBtn.Enabled := True;
                end;
                SettingPanel.Top := SettingPanel.Top + iStep;
                //WizardForm.Caption := 'time: ' + IntToStr(dwTime-iStartTime) + '; length: ' + IntToStr(SettingPanel.Top); //debug
            end;
        $3: begin
                if SettingPanel.Top <= -iLen + iStep then
                begin
                    KillTimer(0, iTimer);
                    hBtn.Enabled := True;
                end;
                SettingPanel.Top := SettingPanel.Top - iStep;
                //WizardForm.Caption := 'time: ' + IntToStr(dwTime-iStartTime) + '; length: ' + IntToStr(SettingPanel.Top); //debug
            end;
    end;
end;

procedure RollControl(Ctrl: TControl; dwTime, dwFlag: DWORD);
//  Ctrl    :   control
//  dwTime  :   rolling time, ms
//  dwFlag  :   roll type ($0 - left to right, $1 - right to left, $2 - top to bottom, $3 - bottom to top)
var
    iLen, iStep: Integer;
    iKoeff: Extended;
begin
    iLen := (dwFlag shr $1 xor $1)*Ctrl.Width + (dwFlag shr $1)*Ctrl.Height;
    repeat
        iStep := iStep + 1;
        iKoeff := (iStep * dwTime)/(iLen * 1000/64);
    until iKoeff >= 1;
    //
    if iRollInfo = 0 then iRollInfo := (dwFlag shl $18) or (iStep shl $10) or iLen else iRollInfo := iRollInfo xor $1000000;
    iTimer := SetTimer(0, 0, Trunc(iKoeff)*1000/64, CallbackAddr('TimerProc'));
end;

procedure HideShow(Sender: TObject);
begin
    //iStartTime := GetTickCount; //debug
    RollControl(SettingPanel, 1000, $2);
    TButton(Sender).Enabled := False;
end;

procedure InitializeWizard();
begin
    SettingPanel := TPanel.Create(WizardForm);
    with SettingPanel do
    begin
        Parent := WizardForm;
        SetBounds(ScaleX(0), ScaleY(-315), ScaleX(497), ScaleY(315));
        ParentBackground := False;
    end;

    hBtn := TButton.Create(WizardForm);
    with hBtn do
    begin
        OnClick := @HideShow;
        SetBounds(ScaleX(40), ScaleY(327), ScaleX(75), ScaleY(25));
        Caption := 'Show';
        Parent := WizardForm;
    end;
end;