First, many thanks to Kambiz for creating such a great Delphi component.
New function for advance PaintText in PrintPreview Component
Capability:
Rect
BkColor
BiDiMode
WordWrap
TextLayout
Transparent
TextAlignment
- Code: Select all
Procedure PaintText(Canvas: TCanvas; FText: String; FRect: TRect; FTransparent: Boolean = True; FColor: TColor = clWhite; FAlignment: TAlignment = taRightJustify; FWordWrap: Boolean = True; FLayout: TTextLayout = tlCenter; FBiDiMode: TBiDiMode = bdRightToLeft);
Const
WordWraps: Array[Boolean] Of Word = (0, DT_WORDBREAK);
Alignments: Array[TAlignment] Of Word = (DT_LEFT, DT_RIGHT, DT_CENTER);
Var
DrawStyle: LongInt;
ARect, CalcRect: TRect;
Function DrawTextBiDiModeFlags(Flags: Longint): Longint;
Function UseRightToLeftAlignment: Boolean;
Begin
Result := SysLocale.MiddleEast And (FBiDiMode = bdRightToLeft);
End;
Function UseRightToLeftReading: Boolean;
Begin
Result := SysLocale.MiddleEast And (FBiDiMode <> bdLeftToRight);
End;
Function DrawTextBiDiModeFlagsReadingOnly: Longint;
Begin
If UseRightToLeftReading Then
Result := DT_RTLREADING
Else
Result := 0;
End;
Begin
Result := Flags;
{ do not change center alignment }
If UseRightToLeftAlignment Then
If Result And DT_RIGHT = DT_RIGHT Then
Result := Result And Not DT_RIGHT { removing DT_RIGHT, makes it DT_LEFT }
Else
If Not (Result And DT_CENTER = DT_CENTER) Then
Result := Result Or DT_RIGHT;
Result := Result Or DrawTextBiDiModeFlagsReadingOnly;
End;
Procedure DoDrawText(Var ARect: TRect; Flags: LongInt; AText: String);
Const
FShowAccelChar = True;
Begin
If (Flags And DT_CALCRECT <> 0) And ((AText = '') Or FShowAccelChar And
(AText[1] = '&') And (AText[2] = #0)) Then AText := AText + ' ';
If Not FShowAccelChar Then Flags := Flags Or DT_NOPREFIX;
Flags := DrawTextBiDiModeFlags(Flags);
DrawText(Canvas.Handle, PChar(AText), Length(AText), ARect, Flags);
End;
Begin
With Canvas Do
Begin
ARect := FRect;
If Not FTransparent Then
Begin
Brush.Color := FColor;
Brush.Style := bsSolid;
FillRect(ARect);
End;
Brush.Style := bsClear;
{ DoDrawText takes care of BiDi alignments }
DrawStyle := DT_EXPANDTABS Or WordWraps[FWordWrap] Or Alignments[FAlignment];
{ Calculate vertical layout }
If FLayout <> tlTop Then
Begin
CalcRect := ARect;
DoDrawText(CalcRect, DrawStyle Or DT_CALCRECT, FText);
If FLayout = tlBottom Then
OffsetRect(ARect, 0, ARect.Bottom - CalcRect.Bottom)
Else
OffsetRect(ARect, 0, (ARect.Bottom - CalcRect.Bottom) Shr 1);
End;
DoDrawText(ARect, DrawStyle, FText);
End;
End;
