tntjvgroupbox.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

{-----------------------------------------------------------------------------
The contents of this file are subject to the Mozilla Public License
Version 1.1 (the "License"); you may not use this file except in compliance
with the License. You may obtain a copy of the License at
http://www.mozilla.org/MPL/MPL-1.1.html

Software distributed under the License is distributed on an "AS IS" basis,
WITHOUT WARRANTY OF ANY KIND, either expressed or implied. See the License for
the specific language governing rights and limitations under the License.

The Original Code is: JvGroupBox.PAS, released on 2000-11-22.

The Initial Developer of the Original Code is Peter Below <100113 dott 1101 att compuserve dott com>
Portions created by Peter Below are Copyright (C) 2000 Peter Below.
All Rights Reserved.

Contributor(s): ______________________________________.

You may retrieve the latest version of this file at the Project JEDI's JVCL home page,
located at http://jvcl.sourceforge.net

Known Issues:
-----------------------------------------------------------------------------}
// $Id: JvGroupBox.pas,v 1.36 2005/02/17 10:20:35 marquardt Exp $

unit TntJvGroupBox;

{$I jvcl.inc}

interface

uses
  {$IFDEF UNITVERSIONING}
  JclUnitVersioning,
  {$ENDIF UNITVERSIONING}
  SysUtils, Classes, Windows, TntWindows, Messages, Graphics, TntGraphics, Controls, Forms, StdCtrls,
  JvThemes, JvExControls, JvExStdCtrls, TntJvExStdCtrls, JvJCLUtils, JvComponent;

type
  TTntJvGroupBox = class(TTntJvExGroupBox, IJvDenySubClassing)
  private
    FOnHotKey: TNotifyEvent;
    FPropagateEnable: Boolean;
    procedure SetPropagateEnable(const Value: Boolean);
  protected
    function WantKey(Key: Integer; Shift: TShiftState;
      const KeyText: WideString): Boolean; override;
    procedure EnabledChanged; override;
    procedure DoHotKey; dynamic;
    procedure Paint; override;
  public
    constructor Create(AOwner: TComponent); override;
    property Canvas;
  published
    property HintColor;
    {$IFDEF JVCLThemesEnabledD56}
    property ParentBackground default True;
    {$ENDIF JVCLThemesEnabledD56}
    property PropagateEnable: Boolean read FPropagateEnable write SetPropagateEnable default False;
    property OnMouseEnter;
    property OnMouseLeave;
    property OnParentColorChange;
    property OnHotKey: TNotifyEvent read FOnHotKey write FOnHotKey;
  end;

{$IFDEF UNITVERSIONING}
const
  UnitVersioning: TUnitVersionInfo = (
    RCSfile: '$RCSfile: JvGroupBox.pas,v $';
    Revision: '$Revision: 1.36 $';
    Date: '$Date: 2005/02/17 10:20:35 $';
    LogPath: 'JVCL'run'
  );
{$ENDIF UNITVERSIONING}

implementation

uses
  Math, TntWideStrUtils;

constructor TTntJvGroupBox.Create(AOwner: TComponent);
begin
  inherited Create(AOwner);
  FPropagateEnable := False;
  ControlStyle := ControlStyle + [csAcceptsControls];
  {$IFDEF JVCLThemesEnabledD56}
  IncludeThemeStyle(Self, [csParentBackground]);
  {$ENDIF JVCLThemesEnabledD56}
end;

procedure TTntJvGroupBox.Paint;
var
  H: Integer;
  R: TRect;
  Flags: Longint;
  {$IFDEF JVCLThemesEnabledD56}
  Details: TThemedElementDetails;
  CaptionRect: TRect;
  {$ENDIF JVCLThemesEnabledD56}
  LastBkMode: Integer;
begin
  {$IFDEF JVCLThemesEnabled}
  if ThemeServices.ThemesEnabled then
  begin
    {$IFDEF COMPILER7_UP}
    inherited Paint;
    {$ELSE}
    if Enabled then
      Details := ThemeServices.GetElementDetails(tbGroupBoxNormal)
    else
      Details := ThemeServices.GetElementDetails(tbGroupBoxDisabled);
    R := ClientRect;
    Inc(R.Top, Canvas.TextHeight('0') div 2);
    ThemeServices.DrawElement(Canvas.Handle, Details, R);

    CaptionRect := Rect(8, 0, Min(WideCanvasTextWidth(Canvas,Caption) + 8, ClientWidth - 8),
      Canvas.TextHeight(Caption));

    Canvas.Brush.Color := Self.Color;
    DrawThemedBackground(Self, Canvas, CaptionRect);
    ThemeServices.DrawText(Canvas.Handle, Details, Caption, CaptionRect, DT_LEFT, 0);
    {$ENDIF COMPILER7_UP}
    Exit;
  end;
  {$ENDIF JVCLThemesEnabled}
  with Canvas do
  begin
    LastBkMode := GetBkMode(Handle);
    try
      Font := Self.Font;
      H := TextHeight('0');
      R := Rect(0, H div 2 - 1, Width, Height);
      {$IFDEF VCL}
      if Ctl3D then
      begin
      {$ENDIF VCL}
        Inc(R.Left);
        Inc(R.Top);
        Brush.Color := clBtnHighlight;
        FrameRect({$IFDEF VisualCLX} Canvas, {$ENDIF} R);
        OffsetRect(R, -1, -1);
        Brush.Color := clBtnShadow;
      {$IFDEF VCL}
      end
      else
        Brush.Color := clWindowFrame;
      {$ENDIF VCL}
      FrameRect({$IFDEF VisualCLX} Canvas, {$ENDIF} R);
      if Caption <> '' then
      begin
        if not UseRightToLeftAlignment then
          R := Rect(8, 0, 0, H)
        else
          R := Rect(R.Right - WideCanvasTextWidth(Canvas,Caption) - 8, 0, 0, H);
        Flags := DrawTextBiDiModeFlags(DT_SINGLELINE);
        // calculate text rect
        SetBkMode(Handle, OPAQUE);
        Tnt_DrawTextW(Handle, PWideChar(Caption), Length(Caption), R, Flags or DT_CALCRECT);
        Brush.Color := Color;
        if not Enabled then
        begin
          OffsetRect(R, 1, 1);
          Font.Color := clBtnHighlight;
          Tnt_DrawTextW(Canvas.Handle, PWideChar(Caption), Length(Caption), R, Flags);
          OffsetRect(R, -1, -1);
          Font.Color := clBtnShadow;
          SetBkMode(Handle, TRANSPARENT);
          Tnt_DrawTextW(Canvas.Handle, PWideChar(Caption), Length(Caption), R, Flags);
        end
        else
          Tnt_DrawTextW(Canvas.Handle, PWideChar(Caption), Length(Caption), R, Flags);
      end;
    finally
      SetBkMode(Handle, LastBkMode);
      {$IFDEF VisualCLX}
      Stop;
      {$ENDIF VisualCLX}
    end;
  end;
end;

function TTntJvGroupBox.WantKey(Key: Integer; Shift: TShiftState;
  const KeyText: WideString): Boolean;
begin
  Result := inherited WantKey(Key, Shift, KeyText);
  if Result then
    DoHotKey;
end;

procedure TTntJvGroupBox.EnabledChanged;
var
  I: Integer;
begin
  inherited EnabledChanged;
  if PropagateEnable then
    for I := 0 to ControlCount - 1 do
      Controls[I].Enabled := Enabled;
  Invalidate;
end;

procedure TTntJvGroupBox.DoHotKey;
begin
  if Assigned(FOnHotKey) then
    FOnHotKey(Self);
end;

procedure TTntJvGroupBox.SetPropagateEnable(const Value: Boolean);
var
  I: Integer;
begin
  FPropagateEnable := Value;
  for I := 0 to ControlCount - 1 do
    Controls[I].Enabled := Enabled;
end;

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

finalization
  UnregisterUnitVersion(HInstance);
{$ENDIF UNITVERSIONING}

end.