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{*****************************************************************************}
{ }
{ Tnt Delphi Unicode Controls }
{ http://www.tntware.com/delphicontrols/unicode/ }
{ Version: 2.3.0 }
{ }
{ Copyright (c) 2002-2007, Troy Wolbrink (troy.wolbrink@tntware.com) }
{ }
{*****************************************************************************}
unit TntGraphics;
{$INCLUDE TntCompilers.inc}
interface
uses
Graphics, Windows;
{TNT-WARN TextRect}
procedure WideCanvasTextRect(Canvas: TCanvas; Rect: TRect; X, Y: Integer; const Text: WideString);
{TNT-WARN TextOut}
procedure WideCanvasTextOut(Canvas: TCanvas; X, Y: Integer; const Text: WideString);
{TNT-WARN TextExtent}
function WideCanvasTextExtent(Canvas: TCanvas; const Text: WideString): TSize;
function WideDCTextExtent(hDC: THandle; const Text: WideString): TSize;
{TNT-WARN TextWidth}
function WideCanvasTextWidth(Canvas: TCanvas; const Text: WideString): Integer;
{TNT-WARN TextHeight}
function WideCanvasTextHeight(Canvas: TCanvas; const Text: WideString): Integer;
type
{TNT-WARN TPicture}
TTntPicture = class(TPicture{TNT-ALLOW TPicture})
public
procedure LoadFromFile(const Filename: WideString);
procedure SaveToFile(const Filename: WideString);
end;
implementation
uses
SysUtils, TntSysUtils;
type
TAccessCanvas = class(TCanvas);
procedure WideCanvasTextRect(Canvas: TCanvas; Rect: TRect; X, Y: Integer; const Text: WideString);
var
Options: Longint;
begin
with TAccessCanvas(Canvas) do begin
Changing;
RequiredState([csHandleValid, csFontValid, csBrushValid]);
Options := ETO_CLIPPED or TextFlags;
if Brush.Style <> bsClear then
Options := Options or ETO_OPAQUE;
if ((TextFlags and ETO_RTLREADING) <> 0) and
(CanvasOrientation = coRightToLeft) then Inc(X, WideCanvasTextWidth(Canvas, Text) + 1);
Windows.ExtTextOutW(Handle, X, Y, Options, @Rect, PWideChar(Text),
Length(Text), nil);
Changed;
end;
end;
procedure WideCanvasTextOut(Canvas: TCanvas; X, Y: Integer; const Text: WideString);
begin
with TAccessCanvas(Canvas) do begin
Changing;
RequiredState([csHandleValid, csFontValid, csBrushValid]);
if CanvasOrientation = coRightToLeft then Inc(X, WideCanvasTextWidth(Canvas, Text) + 1);
Windows.ExtTextOutW(Handle, X, Y, TextFlags, nil, PWideChar(Text),
Length(Text), nil);
MoveTo(X + WideCanvasTextWidth(Canvas, Text), Y);
Changed;
end;
end;
function WideDCTextExtent(hDC: THandle; const Text: WideString): TSize;
begin
Result.cx := 0;
Result.cy := 0;
Windows.GetTextExtentPoint32W(hDC, PWideChar(Text), Length(Text), Result);
end;
function WideCanvasTextExtent(Canvas: TCanvas; const Text: WideString): TSize;
begin
with TAccessCanvas(Canvas) do begin
RequiredState([csHandleValid, csFontValid]);
Result := WideDCTextExtent(Handle, Text);
end;
end;
function WideCanvasTextWidth(Canvas: TCanvas; const Text: WideString): Integer;
begin
Result := WideCanvasTextExtent(Canvas, Text).cX;
end;
function WideCanvasTextHeight(Canvas: TCanvas; const Text: WideString): Integer;
begin
Result := WideCanvasTextExtent(Canvas, Text).cY;
end;
{ TTntPicture }
procedure TTntPicture.LoadFromFile(const Filename: WideString);
var
ShortName: WideString;
begin
ShortName := WideExtractShortPathName(Filename);
if WideSameText(WideExtractFileExt(FileName), '.jpeg') // the short name ends with ".JPE"!
or (ShortName = '') then // GetShortPathName failed
inherited LoadFromFile(FileName)
else
inherited LoadFromFile(WideExtractShortPathName(Filename));
end;
procedure TTntPicture.SaveToFile(const Filename: WideString);
var
TempFile: WideString;
begin
if Graphic <> nil then begin
// create to temp file (ansi safe file name)
repeat
TempFile := WideExtractFilePath(Filename) + IntToStr(Random(MaxInt)) + WideExtractFileExt(Filename);
until not WideFileExists(TempFile);
CloseHandle(WideFileCreate(TempFile)); // make it a real file so that it has a temp
try
// save
Graphic.SaveToFile(WideExtractShortPathName(TempFile));
// rename
WideDeleteFile(Filename);
if not WideRenameFile(TempFile, FileName) then
RaiseLastOSError;
finally
WideDeleteFile(TempFile);
end;
end;
end;
end.
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