mainform.cpp

C++ BUILDER精彩编程实例集锦(源码)2 第三部分 文件操作 第四部分 图像处理

//---------------------------------------------------------------------------

#include <vcl.h>
#pragma hdrstop
#include <vcl\printers.hpp>
#include "MainForm.h"
//---------------------------------------------------------------------------
#pragma package(smart_init)
#pragma resource "*.dfm"
TForm1 *Form1;
//---------------------------------------------------------------------------
__fastcall TForm1::TForm1(TComponent* Owner)
        : TForm(Owner)
{
}
//---------------------------------------------------------------------------
void __fastcall TForm1::BitBtn2Click(TObject *Sender)
{
   this->Close();        
}
//---------------------------------------------------------------------------

void __fastcall TForm1::BitBtn1Click(TObject *Sender)
{
   if(this->OpenDialog1->Execute())
   {
     this->Image1->Picture->LoadFromFile(this->OpenDialog1->FileName);
   }
}
//---------------------------------------------------------------------------


void __fastcall TForm1::BitBtn3Click(TObject *Sender)
{
   TRect PrnRect,ImgRect;
   int CenterX,CenterY,X1,Y1,X2,Y2,SDiv;
   this->Label1->Caption="正在打印图像...";
   Printer()->BeginDoc();
   int PHeight=Printer()->PageHeight;
   int PWidth=Printer()->PageWidth;
   CenterX=PWidth/2;
   CenterY=PHeight/2;
   SDiv=2;//放大2倍打印
   X1=CenterX-(PWidth/(SDiv*2));
   Y1=CenterY-(PHeight/(SDiv*2));
   X2=CenterX+(PWidth/(SDiv*2));
   Y2=CenterY-(PHeight/(SDiv*2));
   PrnRect=Rect(X1,Y2,X2,Y2);
   ImgRect=Rect(0,0,Image1->Width,Image1->Height);

   Printer()->Canvas->CopyRect(PrnRect,Form1->Canvas,ImgRect);
   Printer()->EndDoc();
   this->Label1->Caption="打印完毕！";
}
//---------------------------------------------------------------------------