我記得常常可以拿到一個圓形的紙盤, 旋轉內圈,對應到外圈的數值, 便可以量得身高體重有沒有標準啦、 這個季節的星象啦、、、 挺實用,GUI又挺友善的,所以想寫個這樣的程式. 有沒有不錯的idea,告訴我該如何去完成它呢? === load兩個圓形? 硬用canvas畫圓? or other skills?

http://www.visualcomponentlibrary.com/bcb/gdi/gdicoord.htm    

//---------------------------------------------------------------------------
void __fastcall TForm1::FormPaint(TObject *Sender)
{
    SetViewportOrgEx(Canvas->Handle, 300, 200, NULL);        Canvas->Pen->Color = clRed;
    Canvas->Ellipse(-100, -100, 100, 100);
    //Canvas->Ellipse.....
    Canvas->Pen->Color = clBlue;
    Canvas->MoveTo(-300, 0);
    Canvas->LineTo(300, 0);
    Canvas->MoveTo(0, -200);
    Canvas->LineTo(0, 200);        Canvas->Pen->Color = clFuchsia;
    Canvas->MoveTo(0, 0);
    Canvas->LineTo(150, 150);
}
//---------------------------------------------------------------------------     

網海無涯，學無止境! 發表人 - qoo1234 於 2004/03/15 01:32:11