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| procedure FormattedTextOut(TargetCanvas: TCanvas; const Rect: TRect;
const Text: string; Selected: Boolean; Columns: TProposalColumns; Images: TImageList);
var
Chunks: TFormatChunkList;
StripCommands: TFormatCommands;
begin
Chunks := TFormatChunkList.Create;
try
if Selected then
StripCommands := [fcColor]
else
StripCommands := [];
ParseFormatChunks(Text, Chunks, StripCommands);
PaintChunks(TargetCanvas, Rect, Chunks, Columns, Images, False);
finally
Chunks.Free;
end;
end;
function FormattedTextWidth(TargetCanvas: TCanvas; const Text: string;
Columns: TProposalColumns; Images: TImageList): Integer;
var
Chunks: TFormatChunkList;
TmpRect: TRect;
begin
Chunks := TFormatChunkList.Create;
try
TmpRect := Rect(0, 0, MaxInt, MaxInt);
ParseFormatChunks(Text, Chunks, [fcColor]);
Result := PaintChunks(TargetCanvas, TmpRect, Chunks, Columns, Images, True);
finally
Chunks.Free;
end;
end;
function PaintChunks(TargetCanvas: TCanvas; const Rect: TRect;
ChunkList: TFormatChunkList; Columns: TProposalColumns; Images: TImageList;
Invisible: Boolean): Integer;
var
i: Integer;
X, tmpX: Integer;
C: PFormatChunk;
CurrentColumn: TProposalColumn;
CurrentColumnIndex: Integer;
LastColumnStart: Integer;
Style: TFontStyles;
OldFont: TFont;
begin
OldFont := TFont.Create;
try
OldFont.Assign(TargetCanvas.Font);
if Assigned(Columns) and (Columns.Count > 0) then
begin
CurrentColumnIndex := 0;
CurrentColumn := TProposalColumn(Columns.Items[0]);
TargetCanvas.Font.Style := CurrentColumn.FFontStyle;
end else
begin
CurrentColumnIndex := -1;
CurrentColumn := nil;
end;
LastColumnStart := Rect.Left;
X := Rect.Left;
TargetCanvas.Brush.Style := bsClear;
for i := 0 to ChunkList.Count -1 do
begin
C := ChunkList[i];
case C^.Command of
fcNoCommand:
begin
if not Invisible then
TargetCanvas.TextOut(X, Rect.Top, C^.Str);
tmpX := TargetCanvas.TextWidth(C^.Str);
if tmpX = 0 then
writeln(C^.Str); inc(X, tmpX);
if X > Rect.Right then
break;
end;
fcColor:
if not Invisible then
TargetCanvas.Font.Color := TColor(C^.Data);
fcStyle:
begin
case PFormatStyleData(C^.Data)^.Style of
'I': Style := [fsItalic];
'B': Style := [fsBold];
'U': Style := [fsUnderline];
'S': Style := [fsStrikeout];
else Assert(False);
end;
case PFormatStyleData(C^.Data)^.Action of
-1: TargetCanvas.Font.Style := TargetCanvas.Font.Style - Style;
0: if TargetCanvas.Font.Style * Style = [] then
TargetCanvas.Font.Style := TargetCanvas.Font.Style + Style
else
TargetCanvas.Font.Style := TargetCanvas.Font.Style - Style;
1: TargetCanvas.Font.Style := TargetCanvas.Font.Style + Style;
else Assert(False);
end;
end;
fcColumn:
if Assigned(Columns) and (Columns.Count > 0) then
begin
if CurrentColumnIndex <= Columns.Count -1 then
begin
inc(LastColumnStart, TargetCanvas.TextWidth(CurrentColumn.FBiggestWord+' '));
X := LastColumnStart;
inc(CurrentColumnIndex);
if CurrentColumnIndex <= Columns.Count -1 then
begin
CurrentColumn := TProposalColumn(Columns.Items[CurrentColumnIndex]);
TargetCanvas.Font.Style := CurrentColumn.FFontStyle;
end else
CurrentColumn := nil;
end;
end;
fcHSpace:
begin
inc(X, Integer(C^.Data));
if X > Rect.Right then
break;
end;
fcImage:
begin
Assert(Assigned(Images));
Images.Draw(TargetCanvas, X, Rect.Top, Integer(C^.Data));
inc(X, Images.Width);
if X > Rect.Right then
break;
end;
end;
end;
Result := X;
TargetCanvas.Font.Assign(OldFont);
finally
OldFont.Free;
TargetCanvas.Brush.Style := bsSolid;
end;
end; |