rm_jvexcontrols.pas

这是一个功能强大

    ChangingProperty('Color');
    FColor := Value;
    ChangedProperty('Color');
    Changed;
  end;
end;

procedure TJvHotTrackOptions.SetEnabled(Value: Boolean);
begin
  if FEnabled <> Value then
  begin
    Changing;
    ChangingProperty('Enabled');
    FEnabled := Value;
    ChangedProperty('Enabled');
    Changed;
  end;
end;

procedure TJvHotTrackOptions.SetFrameVisible(Value: Boolean);
begin
  if FFrameVisible <> Value then
  begin
    Changing;
    ChangingProperty('FrameVisible');
    FFrameVisible := Value;
    ChangedProperty('FrameVisible');
    Changed;
  end;
end;

procedure TJvHotTrackOptions.SetFrameColor(Value: TColor);
begin
  if FFrameColor <> Value then
  begin
    Changing;
    ChangingProperty('FrameColor');
    FFrameColor := Value;
    ChangedProperty('FrameColor');
    Changed;
  end;
end;

//============================================================================

constructor TJvExControl.Create(AOwner: TComponent);
begin
  inherited Create(AOwner);
  FHintColor := clDefault;
end;

function TJvExControl.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 TJvExControl.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 TJvExControl.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 TJvExControl.VisibleChanged;
begin
  BaseWndProc(CM_VISIBLECHANGED);
end;

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

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

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

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

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

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

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

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

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

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

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

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

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

{$IFDEF COMPILER5}
{$IFNDEF HASAUTOSIZE}

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

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

{$ENDIF !HASAUTOSIZE}
{$ENDIF COMPILER5}

procedure TJvExControl.WndProc(var Msg: TMessage);
{$IFDEF CLR}
var
  AHintInfo: THintInfo;
{$ENDIF CLR}
begin
  if not DispatchIsDesignMsg(Self, Msg) then
  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;
  else
    inherited WndProc(Msg);
  end;
end;

//============================================================================

constructor TJvExWinControl.Create(AOwner: TComponent);
begin
  inherited Create(AOwner);
  FHintColor := clDefault;
end;

function TJvExWinControl.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 TJvExWinControl.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 TJvExWinControl.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 TJvExWinControl.VisibleChanged;
begin
  BaseWndProc(CM_VISIBLECHANGED);
end;

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

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

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

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

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

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

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

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

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

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

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

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

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

{$IFDEF COMPILER5}
{$IFNDEF HASAUTOSIZE}

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

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

{$ENDIF !HASAUTOSIZE}
{$ENDIF COMPILER5}

procedure TJvExWinControl.BoundsChanged;
begin
end;

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

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

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

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