?? bsskintabs.pas

?? 一套支持Delphi的VCL庫
?? PAS
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  //
  SaveIndex := -1;
  IR := GetActiveTabRect;
  if not IsNullRect(IR)
  then
    begin
      SaveIndex := SaveDC(Cnvs.Handle);
      ExcludeClipRect(Cnvs.Handle, IR.Left, IR.Top, IR.Right, IR.Bottom);
    end;
  //
  Cnvs.Draw(R.Left, R.Top, TB);
  Cnvs.Draw(R.Left, R.Top + TB.Height, LB);
  Cnvs.Draw(R.Left + RectWidth(R) - RB.Width, R.Top + TB.Height, RB);
  Cnvs.Draw(R.Left, R.Top + RectHeight(R) - BB.Height, BB);
  if SaveIndex <> -1 then RestoreDC(Cnvs.Handle, SaveIndex);
  LB.Free;
  TB.Free;
  RB.Free;
  BB.Free;
end;


procedure TbsSkinPageControl.Loaded;
begin
  inherited Loaded;
  if FIndex = -1
  then
    begin
      if TabHeight <= 0
      then
        SetItemSize(TabWidth, FDefaultItemHeight)
      else
        SetItemSize(TabWidth, TabHeight);
      Change2;
      ReAlign;
    end;
end;

procedure TbsSkinPageControl.WMPaint(var Msg: TWMPaint);
begin
  if PageCount = 0
  then
    begin
      PaintHandler(Msg);
    end
  else
    inherited;
end;

function TbsSkinPageControl.CheckVisibleTabs: Boolean;
var
  i: Integer;
begin
  Result := False;
  if PageCount = 0
  then
    Result := False
  else
    begin
      for i := 0 to PageCount - 1 do
      begin
        if Pages[i].TabVisible
        then
          begin
            Result := True;
            Break;
          end;
      end;
    end;
end;

procedure TbsSkinPageControl.WMEraseBkGnd(var Msg: TWMEraseBkGnd);
begin
  if (PageCount = 0) or (not CheckVisibleTabs)
  then
    begin
      GetSkinData;
      if FIndex = -1
      then
        inherited
      else
        DrawEmptyBackGround(Msg.DC);
    end
  else
    begin
      Msg.Result := 1;
    end;
end;


procedure TbsSkinPageControl.WndProc(var Message:TMessage);
var
  TOff, LOff, Roff, BOff: Integer;
begin
  if Message.Msg = TCM_ADJUSTRECT
  then
    begin
      inherited WndProc(Message);
      if FIndex <> -1
      then
        begin
          TOff := ClRect.Top;
          LOff := ClRect.Left;
          ROff := RectWidth(SkinRect) - ClRect.Right;
          BOff := RectHeight(SkinRect) - ClRect.Bottom;
        end;
      case TabPosition of
        tpLeft:
           if FIndex <> -1
           then
             begin
               PRect(Message.LParam)^.Left := PRect(Message.LParam)^.Left + LOff - 4;
               PRect(Message.LParam)^.Right := ClientWidth - ROff;
               {$IFNDEF VER130}
               PRect(Message.LParam)^.Top := PRect(Message.LParam)^.Top - 4 + TOff;
               {$ELSE}
               PRect(Message.LParam)^.Top := PRect(Message.LParam)^.Top - 6 + TOff;
               {$ENDIF}
               PRect(Message.LParam)^.Bottom := ClientHeight - BOff;
               if FHideTabs then PRect(Message.LParam)^.Left := PRect(Message.LParam)^.Left - 1;
             end
           else
             begin
               PRect(Message.LParam)^.Left := PRect(Message.LParam)^.Left - 3;
               PRect(Message.LParam)^.Right := ClientWidth - 1;
               PRect(Message.LParam)^.Top := PRect(Message.LParam)^.Top - 5;
               PRect(Message.LParam)^.Bottom := ClientHeight - 1;
               if FHideTabs then PRect(Message.LParam)^.Left := PRect(Message.LParam)^.Left - 1;
             end;
        tpRight:
           if FIndex <> -1
           then
             begin
               PRect(Message.LParam)^.Left := LOff;
               PRect(Message.LParam)^.Right := PRect(Message.LParam)^.Right - ROff + 4;
               {$IFNDEF VER130}
               PRect(Message.LParam)^.Top := PRect(Message.LParam)^.Top - 4 + TOff;
               {$ELSE}
               PRect(Message.LParam)^.Top := PRect(Message.LParam)^.Top - 6 + TOff;
               {$ENDIF}
               PRect(Message.LParam)^.Bottom := ClientHeight - BOff;
               if FHideTabs then PRect(Message.LParam)^.Right := PRect(Message.LParam)^.Right + 1;
             end
           else
             begin
               PRect(Message.LParam)^.Left := PRect(Message.LParam)^.Left - 3;
               PRect(Message.LParam)^.Right := PRect(Message.LParam)^.Right + 3;
               PRect(Message.LParam)^.Top := PRect(Message.LParam)^.Top - 5;
               PRect(Message.LParam)^.Bottom := ClientHeight - 1;
               if FHideTabs then PRect(Message.LParam)^.Right := PRect(Message.LParam)^.Right + 1;
             end;
        tpTop:
           if FIndex <> -1
           then
             begin
               PRect(Message.LParam)^.Left := LOff;
               PRect(Message.LParam)^.Right := ClientWidth - ROff;
               PRect(Message.LParam)^.Top := PRect(Message.LParam)^.Top - 6 + TOff;
               PRect(Message.LParam)^.Bottom := ClientHeight - BOff;
               if FHideTabs then PRect(Message.LParam)^.Top := PRect(Message.LParam)^.Top - 1;
             end
           else
             begin
               PRect(Message.LParam)^.Left := 1;
               PRect(Message.LParam)^.Right := ClientWidth - 1;
               PRect(Message.LParam)^.Top := PRect(Message.LParam)^.Top - 5;
               PRect(Message.LParam)^.Bottom := ClientHeight - 1;
               if FHideTabs then PRect(Message.LParam)^.Top := PRect(Message.LParam)^.Top - 1;
             end;
        tpBottom:
          if FIndex <> -1
          then
            begin
              PRect(Message.LParam)^.Left := LOff;
              PRect(Message.LParam)^.Right := ClientWidth - ROff;
              {$IFNDEF VER130}
              PRect(Message.LParam)^.Top := PRect(Message.LParam)^.Top - 4 + TOff;
              {$ELSE}
              PRect(Message.LParam)^.Top := PRect(Message.LParam)^.Top - 6 + TOff;
              {$ENDIF}
              PRect(Message.LParam)^.Bottom := PRect(Message.LParam)^.Bottom + 4 - BOff;
              if FHideTabs then PRect(Message.LParam)^.Bottom := PRect(Message.LParam)^.Bottom + 1;
            end
          else
            begin
              PRect(Message.LParam)^.Left := 1;
              PRect(Message.LParam)^.Right := ClientWidth - 1;
              PRect(Message.LParam)^.Top := 1;
              PRect(Message.LParam)^.Bottom := PRect(Message.LParam)^.Bottom + 3;
            end;

      end;
    end
  else
    if Message.Msg = TCM_GETITEMRECT
    then
      begin
        inherited WndProc(Message);
        if Style = tsTabs
        then
          case TabPosition of
            tpLeft:
                begin
                  PRect(Message.LParam)^.Left := PRect(Message.LParam)^.Left - 2;
                  PRect(Message.LParam)^.Right := PRect(Message.LParam)^.Right - 2;
                end;
            tpRight:
                begin
                  PRect(Message.LParam)^.Left := PRect(Message.LParam)^.Left + 2;
                  PRect(Message.LParam)^.Right := PRect(Message.LParam)^.Right + 2;
                end;

            tpTop:
                begin
                  if not MultiLine
                  then
                    begin
                      PRect(Message.LParam)^.Left := PRect(Message.LParam)^.Left - 2;
                      PRect(Message.LParam)^.Right := PRect(Message.LParam)^.Right - 2;
                    end;
                  PRect(Message.LParam)^.Top := PRect(Message.LParam)^.Top - 2;
                  PRect(Message.LParam)^.Bottom := PRect(Message.LParam)^.Bottom - 2;
                end;
            tpBottom:
                begin
                  if not MultiLine
                  then
                    begin
                      PRect(Message.LParam)^.Left := PRect(Message.LParam)^.Left - 2;
                      PRect(Message.LParam)^.Right := PRect(Message.LParam)^.Right - 2;
                    end;
                  PRect(Message.LParam)^.Top := PRect(Message.LParam)^.Top + 2;
                  PRect(Message.LParam)^.Bottom := PRect(Message.LParam)^.Bottom + 2;
                end;
          end;
      end
  else
  inherited WndProc(Message);
  if (Message.Msg = WM_SIZE) and (not MultiLine) and
     not (csDesigning in ComponentState)
  then
    begin
      CheckScroll;
    end;
end;

function TbsSkinPageControl.GetItemRect(index: integer): TRect;
var
  R: TRect;
begin
  SendMessage(Handle, TCM_GETITEMRECT, index, Integer(@R));
  Result := R;
  if (Index = 0) and not MultiLine then Result.Left := Result.Left + 1;
end;

procedure TbsSkinPageControl.SetItemSize;
begin
  SendMessage(Handle, TCM_SETITEMSIZE, 0, MakeLParam(AWidth, AHeight));
end;

procedure TbsSkinPageControl.PaintWindow(DC: HDC);
var
  SaveIndex: Integer;
begin
  if (Width <= 0) or (Height <=0) then Exit;
  GetSkinData;
  SaveIndex := SaveDC(DC);
  try
    Canvas.Handle := DC;
    if FIndex = -1
    then
      PaintDefaultWindow(Canvas)
    else
      PaintSkinWindow(Canvas);
    DrawTabs(Canvas);
    Canvas.Handle := 0;
  finally
    RestoreDC(DC, SaveIndex);
  end;
end;

procedure TbsSkinPageControl.TestActive(X, Y: Integer);
var
  i, j, k: Integer;
  R: TRect;
  BR: TRect;
begin
  if FHideTabs then Exit;

  FOldActiveTab := FActiveTab;
  FOldActiveTabIndex := FActiveTabIndex;
  FActiveTab := -1;
  FActiveTabIndex := -1;
  k := -1;
  j := -1;
  for i := 0 to PageCount - 1 do
  if Pages[i].TabVisible then
  begin
    Inc(k);
    R := GetItemRect(k);
    if PtInRect(R, Point(X, Y))
    then
      begin
        j := k;
        Break;
      end;
  end;

  FActiveTab := i;
  FActiveTabIndex := j;

  if (FOldActiveTabIndex <> FActiveTabIndex)
  then
    begin
      if (FOldActiveTabIndex <> - 1) and (FOldActiveTabIndex <> TabIndex) and
         (FOldActiveTabIndex < PageCount)
      then
        begin
          R := GetItemRect(FOldActiveTabIndex);
          TbsSkinCustomTabSheet(Pages[FOldActiveTab]).ButtonMouseIn := False;
          TbsSkinCustomTabSheet(Pages[FOldActiveTab]).ButtonMouseDown := False;
          DrawTabs(Canvas);
        end;
      if (FActiveTabIndex <> -1) and (FActiveTabIndex <> TabIndex) and
         (FActiveTabIndex < PageCount)
      then
        begin
          R := GetItemRect(FActiveTabIndex);
          DrawTabs(Canvas);
        end;
    end;

  if (FActiveTabIndex <> -1) and FShowCloseButtons
  then
    with TbsSkinCustomTabSheet(Pages[FActiveTab]) do
    begin
      R := GetItemRect(FActiveTabIndex);
      BR := ButtonRect;
      OffsetRect(BR, R.Left, R.Top);
      if PtInRect(BR, Point(X, Y)) and not ButtonMouseIn
      then
        begin
          ButtonMouseIn := True;
          DrawTabs(Canvas);
        end
      else
      if not PtInRect(BR, Point(X, Y)) and ButtonMouseIn
      then
        begin
         ButtonMouseIn := False;
         ButtonMouseDown := False;
         DrawTabs(Canvas);  
       end;
    end;
end;

procedure TbsSkinPageControl.DrawTabs;
var
  i, j: integer;
  IR: TRect;
  w, h, XCnt, YCnt, X, Y, TOff, LOff, Roff, BOff, YO: Integer;
  Rct, R, DR: TRect;
  Buffer, Buffer2: TBitMap;
  ATabIndex, SaveIndex: Integer;
begin
  if FHideTabs
  then
    begin
      Exit;
    end;
  //
  if (PageCount = 0) then Exit;
  
  if FIndex = -1
  then
    begin
      j := -1;
      for i := 0 to PageCount-1 do
      if Pages[i].TabVisible then
      begin
        inc(j);
        R := GetItemRect(j);
        DrawTab(i, R, (j = TabIndex), j = FActiveTabIndex, Cnvs);
      end;
      Exit;
    end;
  //
  GetSkinData;
  TOff := ClRect.Top;
  LOff := ClRect.Left;
  ROff := RectWidth(SkinRect) - ClRect.Right;
  BOff := RectHeight(SkinRect) - ClRect.Bottom;
  DR := Self.DisplayRect;
  R := Rect(DR.Left - LOff, DR.Top - TOff, DR.Right + ROff, DR.Bottom + BOff);
  Buffer := TBitMap.Create;
  case TabPosition of
    tpTop:
      begin
        Buffer.Width := Width;
        Buffer.Height := R.Top;
      end;
    tpBottom:
      begin
        Buffer.Width := Width;
        Buffer.Height := Height - R.Bottom;
      end;
    tpRight:
      begin
        Buffer.Width := Width - R.Right;
        Buffer.Height := Height;
      end;
    tpLeft:
      begin
        Buffer.Width := R.Left;
        Buffer.Height := Height;
      end;
  end;
  // draw tabsbg
  if IsNullRect(TabsBGRect)
  then
    begin
      TabsBGRect := ClRect;
      OffsetRect(TabsBGRect, SkinRect.Left, SkinRect.Top);
    end;
  w := RectWidth(TabsBGRect);
  h := RectHeight(TabsBGRect);
  XCnt := Buffer.Width div w;
  YCnt := Buffer.Height div h;
  if not TabsBGTransparent
  then
    begin
      Buffer2 := TBitMap.Create;
      Buffer2.Width := w;
      Buffer2.Height := h;
      Buffer2.Canvas.CopyRect(Rect(0, 0, w, h), Picture.Canvas, TabsBGRect);
      for X := 0 to XCnt do
      for Y := 0 to YCnt do
      begin
       Buffer.Canvas.Draw(X * w, Y * h, Buffer2);
      end;
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?? bsskintabs.pas

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