Visual C++ drawing triangle or ellipse in 8 colors

#pragma endregion

private: Graphics^ g;

private: Pen^ my_pen1;

Pen^ my_pen2;

Pen^ my_pen3;

Pen^ my_pen4;

Pen^ my_pen5;

Pen^ my_pen6;

Pen^ my_pen7;

Pen^ my_pen8;

private: System::Void init_Graphics()

{

g=panel1->CreateGraphics();

my_pen1=gcnew Pen(System::Drawing::Color::Red);

my_pen2=gcnew Pen(System::Drawing::Color::Brown);

my_pen3=gcnew Pen(System::Drawing::Color::Green);

my_pen4=gcnew Pen(System::Drawing::Color::Lime);

my_pen5=gcnew Pen(System::Drawing::Color::Purple);

my_pen6=gcnew Pen(System::Drawing::Color::Blue);

my_pen7=gcnew Pen(System::Drawing::Color::Black);

my_pen8=gcnew Pen(System::Drawing::Color::Orange);

}

private: System::Void draw_Triangle(int x1,int y1, int x2, int y2, int x3, int y3, Pen ^pen)

 {

 g->DrawLine(pen,x1,y1,x2,y2);

 g->DrawLine(pen,x2,y2,x3,y3);

 g->DrawLine(pen,x3,y3,x1,y1);

 }

 private: System::Void draw_Ellipse(int x, int y, int width, int height, Pen ^pen)

  {

  g->DrawEllipse(pen,x,y,width,height);

  }

 

private: System::Void init_Random()

{

srand(time(NULL));

}

private: System::Void button1_Click(System::Object^  sender, System::EventArgs^  e) {

Close();

}

private: System::Void Form1_Load(System::Object^  sender, System::EventArgs^  e) {

init_Random();

}

private: System::Void button2_Click(System::Object^  sender, System::EventArgs^  e) {

init_Graphics();

 

int i,j,k;

System::Int32 how_many;

int x1,y1,x2,y2,x3,y3;

int x_ellipse,y_ellipse,w,h;

how_many=Int32::Parse(textBox1->Text);

for(i=0;i<how_many;i++)

{

                     k=rand()%2;

if(k==0)

{

                      j=rand()%8;

 switch(j)

 {

 case 0: x_ellipse=panel1->Width/8+rand()%100,y_ellipse=panel1->Height/8+rand()%100,w=1+rand()%panel1->Width,h=1+rand()%panel1->Height;

     draw_Ellipse(x_ellipse,y_ellipse,w,h,my_pen1);break;

 case 1: x_ellipse=panel1->Width/8+rand()%100,y_ellipse=panel1->Height/8+rand()%100,w=1+rand()%panel1->Width,h=1+rand()%panel1->Height;

     draw_Ellipse(x_ellipse,y_ellipse,w,h,my_pen2);break;

 case 2: x_ellipse=panel1->Width/8+rand()%100,y_ellipse=panel1->Height/8+rand()%100,w=1+rand()%panel1->Width,h=1+rand()%panel1->Height;

     draw_Ellipse(x_ellipse,y_ellipse,w,h,my_pen3);break;

 case 3: x_ellipse=panel1->Width/8+rand()%100,y_ellipse=panel1->Height/8+rand()%100,w=1+rand()%panel1->Width,h=1+rand()%panel1->Height;

     draw_Ellipse(x_ellipse,y_ellipse,w,h,my_pen4);break;

 case 4: x_ellipse=panel1->Width/8+rand()%100,y_ellipse=panel1->Height/8+rand()%100,w=1+rand()%panel1->Width,h=1+rand()%panel1->Height;

     draw_Ellipse(x_ellipse,y_ellipse,w,h,my_pen5);break;

 case 5: x_ellipse=panel1->Width/8+rand()%100,y_ellipse=panel1->Height/8+rand()%100,w=1+rand()%panel1->Width,h=1+rand()%panel1->Height;

     draw_Ellipse(x_ellipse,y_ellipse,w,h,my_pen6);break;

 case 6: x_ellipse=panel1->Width/8+rand()%100,y_ellipse=panel1->Height/8+rand()%100,w=1+rand()%panel1->Width,h=1+rand()%panel1->Height;

     draw_Ellipse(x_ellipse,y_ellipse,w,h,my_pen7);break;

 case 7: x_ellipse=panel1->Width/8+rand()%100,y_ellipse=panel1->Height/8+rand()%100,w=1+rand()%panel1->Width,h=1+rand()%panel1->Height;

     draw_Ellipse(x_ellipse,y_ellipse,w,h,my_pen8);break;

 }

}

else

{

j=rand()%8;

switch(j)

{

case 0: x1=1+rand()%panel1->Width-1;x2=x1=1+rand()%panel1->Width-1;x3=x1=1+rand()%panel1->Width-1;y1=1+rand()%panel1->Height-1;y2=1+rand()%panel1->Height-1;

y3=1+rand()%panel1->Height-1;draw_Triangle(x1,y1,x2,y2,x3,y3,my_pen1);break;

case 1: x1=1+rand()%panel1->Width-1;x2=x1=1+rand()%panel1->Width-1;x3=x1=1+rand()%panel1->Width-1;y1=1+rand()%panel1->Height-1;y2=1+rand()%panel1->Height-1;

y3=1+rand()%panel1->Height-1;draw_Triangle(x1,y1,x2,y2,x3,y3,my_pen2);break;

case 2: x1=1+rand()%panel1->Width-1;x2=x1=1+rand()%panel1->Width-1;x3=x1=1+rand()%panel1->Width-1;y1=1+rand()%panel1->Height-1;y2=1+rand()%panel1->Height-1;

y3=1+rand()%panel1->Height-1;draw_Triangle(x1,y1,x2,y2,x3,y3,my_pen3);break;

case 3: x1=1+rand()%panel1->Width-1;x2=x1=1+rand()%panel1->Width-1;x3=x1=1+rand()%panel1->Width-1;y1=1+rand()%panel1->Height-1;y2=1+rand()%panel1->Height-1;

y3=1+rand()%panel1->Height-1;draw_Triangle(x1,y1,x2,y2,x3,y3,my_pen4);break;

case 4: x1=1+rand()%panel1->Width-1;x2=x1=1+rand()%panel1->Width-1;x3=x1=1+rand()%panel1->Width-1;y1=1+rand()%panel1->Height-1;y2=1+rand()%panel1->Height-1;

y3=1+rand()%panel1->Height-1;draw_Triangle(x1,y1,x2,y2,x3,y3,my_pen5);break;

case 5: x1=1+rand()%panel1->Width-1;x2=x1=1+rand()%panel1->Width-1;x3=x1=1+rand()%panel1->Width-1;y1=1+rand()%panel1->Height-1;y2=1+rand()%panel1->Height-1;

y3=1+rand()%panel1->Height-1;draw_Triangle(x1,y1,x2,y2,x3,y3,my_pen6);break;

case 6: x1=1+rand()%panel1->Width-1;x2=x1=1+rand()%panel1->Width-1;x3=x1=1+rand()%panel1->Width-1;y1=1+rand()%panel1->Height-1;y2=1+rand()%panel1->Height-1;

y3=1+rand()%panel1->Height-1;draw_Triangle(x1,y1,x2,y2,x3,y3,my_pen7);break;

case 7: x1=1+rand()%panel1->Width-1;x2=x1=1+rand()%panel1->Width-1;x3=x1=1+rand()%panel1->Width-1;y1=1+rand()%panel1->Height-1;y2=1+rand()%panel1->Height-1;

y3=1+rand()%panel1->Height-1;draw_Triangle(x1,y1,x2,y2,x3,y3,my_pen8);break;

}

 }

}

 

}

private: System::Void textBox1_TextChanged(System::Object^  sender, System::EventArgs^  e) {

}

};

}