tntjvcombobox.pas

TntExUpdate 是 流行的 TntUnicodeControls控件的扩展包.包括很难找到的 TntJVCL 也在里面. TntSysUtils2.pas/TntSysUtilsEx.pa

  Text := '';
  Change;
end;

procedure TTntJvCustomCheckedComboBox.ToggleOnOff(Sender: TObject);
var
  S: WideString;
begin
  if FListBox.ItemIndex = -1 then
    Exit;
  S := Text;
  if FListBox.Checked[FListBox.ItemIndex] then
  begin
    if Add(FListBox.Items[FListBox.ItemIndex], S, Delimiter) then
      FCheckedCount := FCheckedCount + 1;
  end
  else
  if Remove(FListBox.Items[FListBox.ItemIndex], S, Delimiter) then
    FCheckedCount := FCheckedCount - 1;
  Text := S;
  Change;
end;

//==={ TTntJvCustomComboBox0 } ===============================================

constructor TTntJvCustomComboBox0.Create(AOwner: TComponent);
begin
  inherited Create(AOwner);
  FHintColor := clDefault;
  // FReadOnly := False; //from JvCombobox
end;

function TTntJvCustomComboBox0.BaseWndProc(Msg: Integer; WParam: Integer = 0; LParam: Longint = 0): Integer;
var
  Mesg: TMessage;
begin
  Mesg := CreateWMMessage(Msg, WParam, LParam);
  inherited WndProc(Mesg);
  Result := Mesg.Result;
end;

function TTntJvCustomComboBox0.BaseWndProc(Msg: Integer; WParam: Integer; LParam: TControl): Integer;
var
  Mesg: TMessage;
begin
  Mesg := CreateWMMessage(Msg, WParam, LParam);
  inherited WndProc(Mesg);
  Result := Mesg.Result;
end;

function TTntJvCustomComboBox0.BaseWndProcEx(Msg: Integer; WParam: Integer; var LParam): Integer;
var
  Mesg: TStructPtrMessage;
begin
  Mesg := TStructPtrMessage.Create(Msg, WParam, LParam);
  try
    inherited WndProc(Mesg.Msg);
  finally
    Result := Mesg.Msg.Result;
    Mesg.Free;
  end;
end;

procedure TTntJvCustomComboBox0.VisibleChanged;
begin
  BaseWndProc(CM_VISIBLECHANGED);
end;

procedure TTntJvCustomComboBox0.EnabledChanged;
begin
  BaseWndProc(CM_ENABLEDCHANGED);
end;

procedure TTntJvCustomComboBox0.TextChanged;
begin
  BaseWndProc(CM_TEXTCHANGED);
end;

procedure TTntJvCustomComboBox0.FontChanged;
begin
  BaseWndProc(CM_FONTCHANGED);
end;

procedure TTntJvCustomComboBox0.ColorChanged;
begin
  BaseWndProc(CM_COLORCHANGED);
end;

procedure TTntJvCustomComboBox0.ParentFontChanged;
begin
  BaseWndProc(CM_PARENTFONTCHANGED);
end;

procedure TTntJvCustomComboBox0.ParentColorChanged;
begin
  BaseWndProc(CM_PARENTCOLORCHANGED);
  if Assigned(OnParentColorChange) then
    OnParentColorChange(Self);
end;

procedure TTntJvCustomComboBox0.ParentShowHintChanged;
begin
  BaseWndProc(CM_PARENTSHOWHINTCHANGED);
end;

function TTntJvCustomComboBox0.WantKey(Key: Integer; Shift: TShiftState; const KeyText: WideString): Boolean;
begin
  Result := BaseWndProc(CM_DIALOGCHAR, Word(Key), ShiftStateToKeyData(Shift)) <> 0;
end;

function TTntJvCustomComboBox0.HitTest(X, Y: Integer): Boolean;
begin
  Result := BaseWndProc(CM_HITTEST, 0, SmallPointToLong(PointToSmallPoint(Point(X, Y)))) <> 0;
end;

function TTntJvCustomComboBox0.HintShow(var HintInfo: THintInfo): Boolean;
begin
  GetHintColor(HintInfo, Self, FHintColor);
  Result := BaseWndProcEx(CM_HINTSHOW, 0, HintInfo) <> 0;
end;

procedure TTntJvCustomComboBox0.MouseEnter(AControl: TControl);
begin
  FMouseOver := True;
  {$IFDEF VCL}
  if Assigned(FOnMouseEnter) then
    FOnMouseEnter(Self);
  {$ENDIF VCL}
  BaseWndProc(CM_MOUSEENTER, 0, AControl);
end;

procedure TTntJvCustomComboBox0.MouseLeave(AControl: TControl);
begin
  FMouseOver := False;
  BaseWndProc(CM_MOUSELEAVE, 0, AControl);
  {$IFDEF VCL}
  if Assigned(FOnMouseLeave) then
    FOnMouseLeave(Self);
  {$ENDIF VCL}
end;

{$IFNDEF CLR}
procedure TTntJvCustomComboBox0.FocusChanged(AControl: TWinControl);
begin
  BaseWndProc(CM_FOCUSCHANGED, 0, AControl);
end;
{$ENDIF !CLR}

{$IFDEF COMPILER5}
{$IFNDEF HASAUTOSIZE}

procedure TTntJvCustomComboBox0.CMSetAutoSize(var Msg: TMessage);
begin
  SetAutoSize(Msg.WParam <> 0);
end;

procedure TTntJvCustomComboBox0.SetAutoSize(Value: Boolean);
begin
  TOpenControl_SetAutoSize(Self, Value);
end;

{$ENDIF !HASAUTOSIZE}
{$ENDIF COMPILER5}

procedure TTntJvCustomComboBox0.BoundsChanged;
begin
end;

procedure TTntJvCustomComboBox0.CursorChanged;
begin
  BaseWndProc(CM_CURSORCHANGED);
end;

procedure TTntJvCustomComboBox0.ShowingChanged;
begin
  BaseWndProc(CM_SHOWINGCHANGED);
end;

procedure TTntJvCustomComboBox0.ShowHintChanged;
begin
  BaseWndProc(CM_SHOWHINTCHANGED);
end;

{$IFNDEF CLR}
{ VCL sends CM_CONTROLLISTCHANGE and CM_CONTROLCHANGE in a different order than
  the CLX methods are used. So we must correct it by evaluating "Inserting". }
procedure TTntJvCustomComboBox0.ControlsListChanging(Control: TControl; Inserting: Boolean);
begin
  if Inserting then
    BaseWndProc(CM_CONTROLLISTCHANGE, Integer(Control), Integer(Inserting))
  else
    BaseWndProc(CM_CONTROLCHANGE, Integer(Control), Integer(Inserting));
end;

procedure TTntJvCustomComboBox0.ControlsListChanged(Control: TControl; Inserting: Boolean);
begin
  if not Inserting then
    BaseWndProc(CM_CONTROLLISTCHANGE, Integer(Control), Integer(Inserting))
  else
    BaseWndProc(CM_CONTROLCHANGE, Integer(Control), Integer(Inserting));
end;
{$ENDIF !CLR}

procedure TTntJvCustomComboBox0.GetDlgCode(var Code: TDlgCodes);
begin
end;

procedure TTntJvCustomComboBox0.FocusSet(PrevWnd: THandle);
begin
  BaseWndProc(WM_SETFOCUS, Integer(PrevWnd), 0);
end;

procedure TTntJvCustomComboBox0.FocusKilled(NextWnd: THandle);
begin
  BaseWndProc(WM_KILLFOCUS, Integer(NextWnd), 0);
end;

function TTntJvCustomComboBox0.DoEraseBackground(Canvas: TCanvas; Param: Integer): Boolean;
begin
  Result := BaseWndProc(WM_ERASEBKGND, Canvas.Handle, Param) <> 0;
end;

{$IFDEF JVCLThemesEnabledD56}
function TTntJvCustomComboBox0.GetParentBackground: Boolean;
begin
  Result := JvThemes.GetParentBackground(Self);
end;

procedure TTntJvCustomComboBox0.SetParentBackground(Value: Boolean);
begin
  JvThemes.SetParentBackground(Self, Value);
end;
{$ENDIF JVCLThemesEnabledD56}

procedure TTntJvCustomComboBox0.WndProc(var Msg: TMessage);
var
  IdSaveDC: Integer;
  DlgCodes: TDlgCodes;
  Canvas: TCanvas;
  {$IFDEF CLR}
  AHintInfo: THintInfo;
  {$ENDIF CLR}
begin
  if not DispatchIsDesignMsg(Self, Msg) then
  begin
    case Msg.Msg of
      CM_DENYSUBCLASSING:
      {$IFNDEF CLR}
      Msg.Result := Ord(GetInterfaceEntry(IJvDenySubClassing) <> nil);
      {$ELSE}
      Msg.Result := Integer(Supports(Self, IJvDenySubClassing));
      {$ENDIF !CLR}
    CM_DIALOGCHAR:
      with TCMDialogChar{$IFDEF CLR}.Create{$ENDIF}(Msg) do
        Result := Ord(WantKey(CharCode, KeyDataToShiftState(KeyData), WideChar(CharCode)));
    CM_HINTSHOW:
      {$IFNDEF CLR}
      with TCMHintShow(Msg) do
        Result := Integer(HintShow(HintInfo^));
      {$ELSE}
      with TCMHintShow.Create(Msg) do
      begin
        AHintInfo := HintInfo;
        Result := Integer(HintShow(AHintInfo));
        HintInfo := AHintInfo;
      end;
      {$ENDIF !CLR}
    CM_HITTEST:
      with TCMHitTest{$IFDEF CLR}.Create{$ENDIF}(Msg) do
        Result := Integer(HitTest(XPos, YPos));
    CM_MOUSEENTER:
      MouseEnter({$IFDEF CLR}nil{$ELSE}TControl(Msg.LParam){$ENDIF});
    CM_MOUSELEAVE:
      MouseLeave({$IFDEF CLR}nil{$ELSE}TControl(Msg.LParam){$ENDIF});
    CM_VISIBLECHANGED:
      VisibleChanged;
    CM_ENABLEDCHANGED:
      EnabledChanged;
    CM_TEXTCHANGED:
      TextChanged;
    CM_FONTCHANGED:
      FontChanged;
    CM_COLORCHANGED:
      ColorChanged;
    {$IFNDEF CLR}
    CM_FOCUSCHANGED:
      FocusChanged(TWinControl(Msg.LParam));
    {$ENDIF !CLR}
    CM_PARENTFONTCHANGED:
      ParentFontChanged;
    CM_PARENTCOLORCHANGED:
      ParentColorChanged;
    CM_PARENTSHOWHINTCHANGED:
      ParentShowHintChanged;
    CM_CURSORCHANGED:
      CursorChanged;
    CM_SHOWINGCHANGED:
      ShowingChanged;
    CM_SHOWHINTCHANGED:
      ShowHintChanged;
    {$IFNDEF CLR}
    CM_CONTROLLISTCHANGE:
      if Msg.LParam <> 0 then
        ControlsListChanging(TControl(Msg.WParam), True)
      else
        ControlsListChanged(TControl(Msg.WParam), False);
    CM_CONTROLCHANGE:
      if Msg.LParam = 0 then
        ControlsListChanging(TControl(Msg.WParam), False)
      else
        ControlsListChanged(TControl(Msg.WParam), True);
    {$ENDIF !CLR}
    WM_SETFOCUS:
      FocusSet(THandle(Msg.WParam));
    WM_KILLFOCUS:
      FocusKilled(THandle(Msg.WParam));
    WM_SIZE:
      begin
        inherited WndProc(Msg);
        BoundsChanged;
      end;
    WM_ERASEBKGND:
      begin
        IdSaveDC := SaveDC(HDC(Msg.WParam)); // protect DC against Stock-Objects from Canvas
        Canvas := TCanvas.Create;
        try
          Canvas.Handle := HDC(Msg.WParam);
          Msg.Result := Ord(DoEraseBackground(Canvas, Msg.LParam));
        finally
          Canvas.Handle := 0;
          Canvas.Free;
          RestoreDC(HDC(Msg.WParam), IdSaveDC);
        end;
      end;
    WM_PRINTCLIENT, WM_PRINT: // VCL bug fix
      begin
        IdSaveDC := SaveDC(HDC(Msg.WParam)); // protect DC against changes
        try
          inherited WndProc(Msg);
        finally
          RestoreDC(HDC(Msg.WParam), IdSaveDC);
        end;
      end;
    WM_GETDLGCODE:
      begin
        inherited WndProc(Msg);
        DlgCodes := [dcNative] + DlgcToDlgCodes(Msg.Result);
        GetDlgCode(DlgCodes);
        if not (dcNative in DlgCodes) then
          Msg.Result := DlgCodesToDlgc(DlgCodes);
      end;
    else
      inherited WndProc(Msg);
    end;
    if DotNetHighlighting then
      HandleDotNetHighlighting(Self, Msg, MouseOver, Color);
  end;
end;

(***
procedure TTntJvCustomComboBox0.SetReadOnly(const Value: Boolean);
begin
  if FReadOnly <> Value then
  begin
    FReadOnly := Value;
    SendMessage(EditHandle, EM_SETREADONLY, Ord(Value), 0); //make nothing EditHandle = 0
  end;
end;
***)

//==={ TTntJvCustomComboBox } ================================================

{$IFDEF WithHintEditor}
function TTntJvCustomComboBox.GetHintEditor: TUnicodeLinesEditor;
begin
  Result := FHintEditor;
  FHintEditor.SetText (Hint);
end;

procedure TTntJvCustomComboBox.SetHintEditor(
  const Value: TUnicodeLinesEditor);
begin
  FHintEditor.Assign (Value);
  Hint := FHintEditor.GetText;
end;

constructor TTntJvCustomComboBox.Create(AOwner: TComponent);
begin
  inherited;
  if  csDesigning in ComponentState
  then  FHintEditor := TUnicodeLinesEditor.Create;
end;

destructor TTntJvCustomComboBox.Destroy;
begin
  if  csDesigning in ComponentState
  then  FreeAndNil(FHintEditor);
  inherited;
end;
{$ENDIF}

//=== { TJvPrivForm } ========================================================

function TJvPrivForm.GetValue: Variant;
begin
  Result := '';
end;

procedure TJvPrivForm.SetValue(const Value: Variant);
begin
  {Nothing}
end;

{$IFDEF UNITVERSIONING}
initialization
  RegisterUnitVersion(HInstance, UnitVersioning);

finalization
  UnregisterUnitVersion(HInstance);
{$ENDIF UNITVERSIONING}

end.