Thread: Polygon

What am i doing wrong with this function?
I get an error on the DeleteObject() line. Why would it want to convert it to int.

Code:

void DrawPolygon (HWND hwnd, HDC hdc)
     
     int          i ;
     POINT        apt[10] ;
     static POINT aptFigure [10] = { 10,70, 50,70, 50,10, 90,10, 90,50,
                                     30,50, 30,90, 70,90, 70,30, 10,30 };


     HBRUSH hbr = CreateSolidBrush (RGB (rand () % 256, rand () % 256, rand () % 256)) ;
     HBRUSH hOld = (HBRUSH) SelectObject (hdc,hbr);
     for (i = 0 ; i < 10 ; i++)
          {
               apt[i].x = cxClient * aptFigure[i].x / 200 ;
               apt[i].y = cyClient * aptFigure[i].y / 100 ;
          }

     SetPolyFillMode (hdc, ALTERNATE) ;
     Polygon (hdc, apt, 10) ;

     for (i = 0 ; i < 10 ; i++)
          {
               apt[i].x += cxClient / 2 ;
          }

     SetPolyFillMode (hdc, WINDING) ;
     Polygon (hdc, apt, 10) ;
     SelectObject (hdc,hOld) ;
     DeleteObject (hbr) ; //cannot convert from 'HBRUSH' to 'int'
        There is no context in which this conversion is possible

That does look right to me.

Further, a copy'n'paste of your code [with some minor fixups] compiles correctly in gcc-mingw 3.4.5

--
Mats

What a dork! I forgot the curly braces!

Thank you guys!

One more thing that i dont understand please.

Code:

static POINT aptFigure [10] = { 10,70, 50,70, 50,10, 90,10, 90,50,
                                     30,50, 30,90, 70,90, 70,30, 10,30 };

How can you give two values for one element of the array?
Finally its not a multidimensional array like

Code:

static POINT aptFigure [10] [10]

I cant find any reference to it in tutorials.

Thank you Tabstop, i get it now.

And it should really look like this:

Code:

     static POINT aptFigure [10] = { {10,70}, {50,70}, {50,10}, {90,10}, 
				     {90,50}, {30,50}, {30,90}, {70,90}, 
				     {70,30}, {10,30} };

When compiling using gcc -Wall, it actually warns when the braces are missing [the point being that it's hard to tell what is what].

--
Mats