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C/C++ Source or Header  |  1999-01-13  |  3KB  |  81 lines
  1. //---------------------------------------------------------------------------
  2. #include <vcl\vcl.h>
  3. #pragma hdrstop
  4.  
  5. #include "Arc1.h"
  6. //---------------------------------------------------------------------------
  7. #pragma resource "*.dfm"
  8.  
  9. const int Diff = 120;
  10. int xM, yM;
  11. TForm1 *Form1;
  12.  
  13. //---------------------------------------------------------------------------
  14. __fastcall TForm1::TForm1(TComponent* Owner)
  15.     : TForm(Owner)
  16. {
  17. }
  18. //---------------------------------------------------------------------------
  19. void __fastcall TForm1::FormCreate(TObject *Sender)
  20. {
  21.   xM = ClientWidth / 2;
  22.   yM = ClientHeight / 2;
  23.   Color = clSilver;
  24.   Canvas->Brush->Color = clSilver;
  25.   Canvas->Pen->Color = clRed;
  26. }
  27. //---------------------------------------------------------------------------
  28. void __fastcall TForm1::Bogen (int vonX, int vonY, int bisX, int bisY)
  29. {
  30.   Refresh ();
  31.   Canvas->Arc(xM-Diff,yM-Diff,xM+Diff,yM+Diff, vonX,vonY,bisX,bisY);
  32. }
  33. //---------------------------------------------------------------------------
  34. void __fastcall TForm1::UpperButtonClick(TObject *Sender)
  35. {
  36.   Bogen (xM+Diff,yM,xM-Diff,yM); // oben
  37. }
  38. //---------------------------------------------------------------------------
  39. void __fastcall TForm1::LeftButtonClick(TObject *Sender)
  40. {
  41.   Bogen (xM,yM-Diff,xM,yM+Diff); // links
  42. }
  43. //---------------------------------------------------------------------------
  44. void __fastcall TForm1::LowerButtonClick(TObject *Sender)
  45. {
  46.   Bogen (xM-Diff,yM,xM+Diff,yM); // unten
  47. }
  48. //---------------------------------------------------------------------------
  49. void __fastcall TForm1::RightButtonClick(TObject *Sender)
  50. {
  51.   Bogen (xM,yM+Diff,xM,yM-Diff);  // rechts
  52. }
  53. //---------------------------------------------------------------------------
  54. void __fastcall TForm1::AllButtonClick(TObject *Sender)
  55. {
  56.   Canvas->Ellipse (xM-Diff,yM-Diff,xM+Diff,yM+Diff);
  57. }
  58. //---------------------------------------------------------------------------
  59. void __fastcall TForm1::LOButtonClick(TObject *Sender)
  60. {
  61.   Bogen (xM+Diff,yM-Diff,xM-Diff,yM+Diff);  //  LinksOben
  62. }
  63. //---------------------------------------------------------------------------
  64. void __fastcall TForm1::LUButtonClick(TObject *Sender)
  65. {
  66.   Bogen (xM-Diff,yM-Diff,xM+Diff,yM+Diff);  // LinksUnten
  67. }
  68. //---------------------------------------------------------------------------
  69. void __fastcall TForm1::ROButtonClick(TObject *Sender)
  70. {
  71.   Bogen (xM+Diff,yM+Diff,xM-Diff,yM-Diff);  // RechtsOben
  72.  
  73. }
  74. //---------------------------------------------------------------------------
  75. void __fastcall TForm1::RUButtonClick(TObject *Sender)
  76. {
  77.   Bogen (xM-Diff,yM+Diff,xM+Diff,yM-Diff);  // RechtsUnten
  78.  
  79. }
  80. //---------------------------------------------------------------------------
  81.