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| unit PrintPDF;
interface
uses SysUtils, Graphics, hpdf, hpdf_types, hpdf_consts, Math, StrUtils;
type
TFonts = record
Name :string;
Size :HPDF_REAL;
end;
TPrintPDF = class
private
FCurPos :THPDF_Point;
FFonts :array of TFonts;
Doc :HPDF_Doc;
font :HPDF_Font;
page :HPDF_Page;
FMargins :THPDF_Rect;
FTitle: string;
FAuthor: string;
FSubject: string;
FCreator: string;
FKeywords: string;
function GetCurPos: THPDF_Point;
procedure SetCurPos(const Value: THPDF_Point);
procedure SetMargins(const Value: THPDF_Rect);
function GetPageSize: THPDF_Point;
function GetInnerPageSize: THPDF_Point;
function GetFontSize: HPDF_REAL;
procedure SetTitle(const Value: string);
procedure SetAuthor(const Value: string);
procedure SetCreator(const Value: string);
procedure SetKeywords(const Value: string);
procedure SetSubject(const Value: string);
public
procedure NewPage;
procedure AddFont(aName :string; aSize :HPDF_REAL);
procedure SelectFont(aIndex :integer);
procedure IncCurPosY(aValue :HPDF_REAL);
procedure IncCurPosX(aValue :HPDF_REAL);
procedure SaveToFile(aFileName :TFileName);
procedure Write(aText :string; aFontIndex :integer = -1);
procedure WriteLn(aText :string = ''; aFontIndex :integer = -1);
procedure TextOut(X, Y: HPDF_REAL; aText :string; aFontIndex :integer = -1);
procedure WriteLink(aText, aURL :string);
procedure WriteLinkLn(aText, aURL :string);
procedure DrawImage(aFileName :TFileName; X, Y, W, H :HPDF_REAL);
function TextWidth(aText :string) :HPDF_REAL;
procedure Rectangle(aLeft, aTop, aWidth, aHeight :HPDF_REAL; aLineWidth: HPDF_REAL = 0.3; aLineColor :TColor = $000000; aFillColor :TColor = $FFFFFF);
constructor Create(aFontName :string = 'Helvetica'; aFontSize :HPDF_REAL = 10);
destructor Destroy; override;
published
property PageSize :THPDF_Point read GetPageSize;
property FontSize :HPDF_REAL read GetFontSize;
property InnerPageSize :THPDF_Point read GetInnerPageSize;
property Margins :THPDF_Rect read FMargins write SetMargins;
property CurPos :THPDF_Point read GetCurPos write SetCurPos;
property Title :string read FTitle write SetTitle;
property Author :string read FAuthor write SetAuthor;
property Creator :string read FCreator write SetCreator;
property Subject :string read FSubject write SetSubject;
property Keywords :string read FKeywords write SetKeywords;
end;
function Pointmm(X, Y :HPDF_REAL) :THPDF_Point;
function Rectmm(aLeft, aTop, aRight, aBottom :HPDF_REAL) :THPDF_Rect;
function Incmm(var aValue :HPDF_REAL; aInc :HPDF_REAL) :HPDF_REAL;
implementation
const
DefaultFontSize :HPDF_REAL = 10;
function Pointmm(X, Y :HPDF_REAL) :THPDF_Point;
begin
Result.X := X;
Result.Y := Y;
end;
function Rectmm(aLeft, aTop, aRight, aBottom :HPDF_REAL) :THPDF_Rect;
begin
Result.Left := aLeft;
Result.Top := aTop;
Result.Right := aRight;
Result.Bottom := aBottom;
end;
function Incmm(var aValue :HPDF_REAL; aInc :HPDF_REAL) :HPDF_REAL;
begin
aValue := aValue +aInc;
Result := aValue;
end;
procedure error_handler (error_no: HPDF_STATUS; detail_no: HPDF_STATUS; user_data: Pointer); stdcall;
begin
raise Exception.Create(Format('Error: %d - %d', [Error_No, Detail_No]));
end;
{ TPrintPDF }
procedure TPrintPDF.AddFont(aName: string; aSize: HPDF_REAL);
var
i :integer;
begin
i := High(FFonts) +1;
SetLength(FFonts, i +1);
FFonts[i].Name := aName;
FFonts[i].Size := aSize;
end;
constructor TPrintPDF.Create(aFontName :string; aFontSize :HPDF_REAL);
begin
Doc := HPDF_New(@error_handler, nil);
HPDF_SetCompressionMode(Doc, HPDF_COMP_ALL);
font := HPDF_GetFont(Doc, PChar(aFontName), 'WinAnsiEncoding');
Margins := Rectmm(5, 5, 5, 5);
NewPage;
AddFont(aFontName, aFontSize);
SelectFont(0);
end;
destructor TPrintPDF.Destroy;
begin
HPDF_Free(Doc);
inherited;
end;
procedure TPrintPDF.DrawImage(aFileName: TFileName; X, Y, W, H: HPDF_REAL);
var
Image :HPDF_Image;
begin
case AnsiIndexText(ExtractFileExt(aFileName), ['.png', '.jpg']) of
0 : image := HPDF_LoadPngImageFromFile(Doc, PAnsiChar(aFileName));
1 : image := HPDF_LoadJpegImageFromFile(Doc, PAnsiChar(aFileName));
end;
HPDF_Page_DrawImage (page, image, X, PageSize.Y -Y -H, W, H);
end;
function TPrintPDF.GetCurPos: THPDF_Point;
begin
Result.X := FCurPos.X;
Result.Y := HPDF_Page_GetHeight(page) -FCurPos.Y;
end;
function TPrintPDF.GetFontSize: HPDF_REAL;
begin
Result := HPDF_Page_GetCurrentFontSize(page);
end;
function TPrintPDF.GetInnerPageSize: THPDF_Point;
begin
Result.x := PageSize.x -Margins.left -Margins.right;
Result.y := PageSize.y -Margins.Top -Margins.Bottom;
end;
function TPrintPDF.GetPageSize: THPDF_Point;
begin
Result.x := HPDF_Page_GetWidth(page);
Result.y := HPDF_Page_GetHeight(page);
end;
procedure TPrintPDF.IncCurPosX(aValue: HPDF_REAL);
begin
FCurPos.X := FCurPos.X +aValue;
end;
procedure TPrintPDF.IncCurPosY(aValue: HPDF_REAL);
begin
FCurPos.Y := FCurPos.Y -aValue;
end;
procedure TPrintPDF.NewPage;
var
Ofs :HPDF_REAL;
begin
page := HPDF_AddPage(Doc);
HPDF_Page_SetSize(Page, HPDF_PAGE_SIZE_A4, HPDF_PAGE_PORTRAIT);
FCurPos.X := Margins.Left;
if IsZero(HPDF_Page_GetCurrentFontSize(page), 0.01)
then Ofs := DefaultFontSize
else Ofs := HPDF_Page_GetCurrentFontSize(page);
FCurPos.Y := HPDF_Page_GetHeight(page) -Margins.Top -Ofs;
end;
procedure TPrintPDF.Rectangle(aLeft, aTop, aWidth, aHeight :HPDF_REAL;
aLineWidth: HPDF_REAL; aLineColor, aFillColor: TColor);
var
R,G,B :byte;
begin
HPDF_Page_SetLineWidth (page, aLineWidth);
R := aLineColor and $FF;
G := (aLineColor shr 8) and $FF;
B := (aLineColor shr 16) and $FF;
HPDF_Page_SetRGBStroke (page, R/255, G/255, B/255);
R := aLineColor and $FF;
G := (aLineColor shr 8) and $FF;
B := (aLineColor shr 16) and $FF;
HPDF_Page_SetRGBFill (page, R/255, G/255, B/255);
HPDF_Page_Rectangle(page, aleft, HPDF_Page_GetHeight(page) -aTop +FontSize, aWidth, -aHeight);
// HPDF_Page_Rectangle(page, aleft, aTop +FontSize, aWidth, -aHeight);
HPDF_Page_Stroke(page);
end;
procedure TPrintPDF.SaveToFile(aFileName: TFileName);
begin
HPDF_SaveToFile(Doc, PAnsiChar(aFileName));
end;
procedure TPrintPDF.SelectFont(aIndex: integer);
begin
aIndex := EnsureRange(aIndex, 0, High(aIndex));
font := HPDF_GetFont(Doc, PChar(FFonts[aIndex].Name), 'WinAnsiEncoding');
HPDF_Page_SetFontAndSize(page, font, FFonts[aIndex].Size);
end;
procedure TPrintPDF.SetAuthor(const Value: string);
begin
FAuthor := Value;
HPDF_SetInfoAttr(Doc, HPDF_INFO_AUTHOR, PAnsiChar(FAuthor));
end;
procedure TPrintPDF.SetCreator(const Value: string);
begin
FCreator := Value;
HPDF_SetInfoAttr(Doc, HPDF_INFO_CREATOR, PAnsiChar(FCreator));
end;
procedure TPrintPDF.SetCurPos(const Value: THPDF_Point);
begin
FCurPos.X := Value.X;
FCurPos.Y := HPDF_Page_GetHeight(page) -Value.Y;
end;
procedure TPrintPDF.SetKeywords(const Value: string);
begin
FKeywords := Value;
HPDF_SetInfoAttr(Doc, HPDF_INFO_KEYWORDS, PAnsiChar(FKeywords));
end;
procedure TPrintPDF.SetMargins(const Value: THPDF_Rect);
begin
FMargins := Value;
CurPos := Pointmm(Max(CurPos.X, FMargins.Left), Max(CurPos.Y, FMargins.Top));
end;
procedure TPrintPDF.SetSubject(const Value: string);
begin
FSubject := Value;
HPDF_SetInfoAttr(Doc, HPDF_INFO_SUBJECT, PAnsiChar(FSubject));
end;
procedure TPrintPDF.SetTitle(const Value: string);
begin
FTitle := Value;
HPDF_SetInfoAttr(Doc, HPDF_INFO_TITLE, PAnsiChar(FTitle));
end;
procedure TPrintPDF.TextOut(X, Y: HPDF_REAL; aText: string; aFontIndex: integer);
var
OldCurPos :THPDF_Point;
begin
OldCurPos := CurPos;
CurPos := Pointmm(X, Y);
Write(aText, aFontIndex);
CurPos := OldCurPos;
end;
function TPrintPDF.TextWidth(aText: string): HPDF_REAL;
begin
Result := HPDF_Page_TextWidth(page, PAnsiChar(aText));
end;
procedure TPrintPDF.Write(aText: string; aFontIndex: integer);
begin
if aFontIndex > -1 then
SelectFont(aFontIndex);
HPDF_Page_BeginText(page);
HPDF_Page_TextOut(page, FCurPos.X, FCurPos.Y, PAnsiChar(aText));
HPDF_Page_EndText (page);
end;
procedure TPrintPDF.WriteLn(aText :string; aFontIndex :integer);
begin
Write(aText, aFontIndex);
IncCurPosY(HPDF_Page_GetCurrentFontSize(page));
end;
procedure TPrintPDF.WriteLink(aText, aURL: string);
var
Rect :THPDF_Rect;
Annot :HPDF_Annotation;
begin
Rect.Left := FCurPos.X;
Rect.top := FCurPos.Y +HPDF_Page_GetCurrentFontSize(page);
Rect.Right := Rect.Left +TextWidth(aText); //HPDF_Page_TextWidth(page, PAnsiChar(aText));
Rect.Bottom := FCurPos.Y -3;
Write(aText);
Annot := HPDF_Page_CreateURILinkAnnot(page, Rect, PAnsiChar(aURL));
HPDF_LinkAnnot_SetBorderStyle (annot, 0, 0, 0);
end;
procedure TPrintPDF.WriteLinkLn(aText, aURL: string);
begin
WriteLink(aText, aURL);
IncCurPosY(HPDF_Page_GetCurrentFontSize(page));
end;
end. |
[D7] Composant pour création de PDF
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PowerPdf is free software based on LGPL. You can use or modify it under the GNU Library general Public License.
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