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//---------------------------------------------------------------------------
#include <vcl.h>
#pragma hdrstop
#include "Unit1.h"
#include "Printers.hpp"
//---------------------------------------------------------------------------
#pragma package(smart_init)
#pragma resource "*.dfm"
TForm1 *Form1;
TMetafile *pMetafile;
TMetafileCanvas *pCanvas;
TList *LPages = new TList();
//---------------------------------------------------------------------------
__fastcall TForm1::TForm1(TComponent* Owner)
: TForm(Owner)
{
}
//---------------------------------------------------------------------------
void __fastcall TForm1::FormCreate(TObject *Sender)
{
TRect R;
String S;
int P;
P = GetDeviceCaps(Printer()->Handle, LOGPIXELSX);
for(int I = 0; I <=2; I++)
{
pMetafile = new TMetafile;
pMetafile->Width = Printer()->PageWidth;
pMetafile->Height = Printer()->PageHeight;
LPages->Add(pMetafile);
}
// if(pMetafile){ delete pMetafile; pMetafile=0; }
pCanvas = new TMetafileCanvas((TMetafile *)LPages->Items[0], 0);
// ecriture d'une premiere chaine
pCanvas->Font->PixelsPerInch = P;
pCanvas->Font->Size = 18;
pCanvas->TextOut(10, 10, "Vous etes sur la page 1");
// ecriture d'une seconde chaine
pCanvas->Font->Size = 22;
S = "Ce texte est centre sur la page";
R = Rect(0, 0, Printer()->PageWidth, Printer()->PageHeight);
DrawText(pCanvas->Handle, S.c_str(),S.Length(), &R, DT_CENTER | DT_VCENTER | DT_SINGLELINE);
delete pCanvas;
pCanvas = new TMetafileCanvas((TMetafile *)LPages->Items[1], 0);
InflateRect(&R, -300, -300);
pCanvas->Ellipse(R);
pCanvas->Pen->Color = clBlue;
InflateRect(&R, -200, -200);
pCanvas->Ellipse(R);
pCanvas->Pen->Color = clGreen;
InflateRect(&R, -200, -200);
pCanvas->Ellipse(R);
pCanvas->Pen->Color = clRed;
InflateRect(&R, -200, -200);
pCanvas->Ellipse(R);
InflateRect(&R, -200, -200);
pCanvas->Rectangle(R);
delete pCanvas;
HDC I;
I = GetDC(0); // Obtention d'un handle de device context sur l'écran
pCanvas = new TMetafileCanvas((TMetafile *)LPages->Items[2], 0);
StretchBlt(pCanvas->Handle, 0, 0,
Printer()->PageWidth, Printer()->PageHeight,
I, 0, 0,
Screen->Width, Screen->Height,
SRCCOPY);
ReleaseDC(Handle, I); // ne pas oublier de relâcher le HDC
Prv->Tag = 0;
delete pCanvas;
}
//---------------------------------------------------------------------------
void __fastcall TForm1::Button1Click(TObject *Sender)
{
// imprimer
Printer()->BeginDoc();
Printer()->Canvas->Draw(0, 0, (TMetafile *)LPages->Items[0]);
Prv->Tag = 0;
Prv->Refresh();
Sleep(1000);
Printer()->NewPage();
Printer()->Canvas->Draw(0, 0, (TMetafile *)LPages->Items[1]);
Prv->Tag = 1;
Prv->Refresh();
Sleep(1000);
Printer()->NewPage();
Printer()->Canvas->Draw(0, 0, (TMetafile *)LPages->Items[2]);
Prv->Tag = 2;
Prv->Refresh();
Sleep(1000);
Printer()->EndDoc();
}
//---------------------------------------------------------------------------
void __fastcall TForm1::PrvPaint(TObject *Sender)
{
if(LPages->Count > 0)
{
Prv->Canvas->Brush->Color = clWhite;
pMetafile = (TMetafile *)LPages->Items[Prv->Tag];
Prv->Canvas->FillRect(Rect(0,0, pMetafile->Width, pMetafile->Height)); //Pour "peindre" le fond en blanc.
Prv->Canvas->StretchDraw(Rect(0, 0, Prv->Width, Prv->Height), pMetafile);
}
}
//---------------------------------------------------------------------------
void __fastcall TForm1::Button2Click(TObject *Sender)
{
// avant
if(Prv->Tag > 0)
{
Prv->Tag = Prv->Tag - 1;
Prv->Refresh();
}
else
{
Prv->Refresh();
ShowMessage(" Vos êtes sur la première page visible ");
}
}
//---------------------------------------------------------------------------
void __fastcall TForm1::Button3Click(TObject *Sender)
{
// apres
if(Prv->Tag < LPages->Count - 1)
{
Prv->Tag = Prv->Tag + 1;
Prv->Refresh();
}
else
{
Prv->Refresh();
ShowMessage(" Vos êtes sur la dernière page visible ");
}
}
//---------------------------------------------------------------------------
void __fastcall TForm1::FormDestroy(TObject *Sender)
{
for(int i = 0; i <= LPages->Count; i++)
{
pMetafile = (TMetafile *)LPages->Items[i];
delete pMetafile;
LPages->Delete(i);
}
LPages->Free();
}
//--------------------------------------------------------------------------- |
Probleme pour recuperer des Metafichiers stockes dans un TList
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