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Windows 95 API Bible
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chapte15
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combrgn.c
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C/C++ Source or Header
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1995-11-25
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7KB
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213 lines
#include <windows.h>
#include "combrgn.h"
#if defined (WIN32)
#define IS_WIN32 TRUE
#else
#define IS_WIN32 FALSE
#endif
#define IS_NT IS_WIN32 && (BOOL)(GetVersion() < 0x80000000)
#define IS_WIN32S IS_WIN32 && (BOOL)(!(IS_NT) && (LOBYTE(LOWORD(GetVersion()))<4))
#define IS_WIN95 (BOOL)(!(IS_NT) && !(IS_WIN32S)) && IS_WIN32
HINSTANCE hInst; // current instance
LPCTSTR lpszAppName = "MyApp";
LPCTSTR lpszTitle = "CombineRgn()";
BOOL RegisterWin95( CONST WNDCLASS* lpwc );
int APIENTRY WinMain( HINSTANCE hInstance, HINSTANCE hPrevInstance,
LPTSTR lpCmdLine, int nCmdShow)
{
MSG msg;
HWND hWnd;
WNDCLASS wc;
wc.style = CS_HREDRAW | CS_VREDRAW;
wc.lpfnWndProc = (WNDPROC)WndProc;
wc.cbClsExtra = 0;
wc.cbWndExtra = 0;
wc.hInstance = hInstance;
wc.hIcon = LoadIcon (hInstance, lpszAppName);
wc.hCursor = LoadCursor(NULL, IDC_ARROW);
wc.hbrBackground = (HBRUSH)(COLOR_WINDOW+1);
wc.lpszMenuName = lpszAppName;
wc.lpszClassName = lpszAppName;
if ( IS_WIN95 )
{
if ( !RegisterWin95( &wc ) )
return( FALSE );
}
else if ( !RegisterClass( &wc ) )
return( FALSE );
hInst = hInstance;
hWnd = CreateWindow( lpszAppName,
lpszTitle,
WS_OVERLAPPEDWINDOW,
CW_USEDEFAULT, 0,
CW_USEDEFAULT, 0,
NULL,
NULL,
hInstance,
NULL
);
if ( !hWnd )
return( FALSE );
ShowWindow( hWnd, nCmdShow );
UpdateWindow( hWnd );
while( GetMessage( &msg, NULL, 0, 0) )
{
TranslateMessage( &msg );
DispatchMessage( &msg );
}
return( msg.wParam );
}
BOOL RegisterWin95( CONST WNDCLASS* lpwc )
{
WNDCLASSEX wcex;
wcex.style = lpwc->style;
wcex.lpfnWndProc = lpwc->lpfnWndProc;
wcex.cbClsExtra = lpwc->cbClsExtra;
wcex.cbWndExtra = lpwc->cbWndExtra;
wcex.hInstance = lpwc->hInstance;
wcex.hIcon = lpwc->hIcon;
wcex.hCursor = lpwc->hCursor;
wcex.hbrBackground = lpwc->hbrBackground;
wcex.lpszMenuName = lpwc->lpszMenuName;
wcex.lpszClassName = lpwc->lpszClassName;
// Added elements for Windows 95.
//...............................
wcex.cbSize = sizeof(WNDCLASSEX);
wcex.hIconSm = LoadIcon(wcex.hInstance, "SMALL");
return RegisterClassEx( &wcex );
}
LRESULT CALLBACK WndProc( HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam )
{
switch( uMsg )
{
case WM_COMMAND :
switch( LOWORD( wParam ) )
{
case IDM_TEST :
{
POINT ptArray[3];
HRGN Rgn1, Rgn2, Rgn3, Rgn4;
LOGBRUSH lb;
HBRUSH hBrush;
HDC hDC = GetDC( hWnd );
// Create a rectangular region.
//.............................
Rgn1 = CreateRectRgn( 10, 10, 110, 110 );
// Create an elliptic region.
//...........................
Rgn2 = CreateEllipticRgn( 60, 60, 160, 160 );
// Create a polygonal region consisting of three points.
//......................................................
ptArray[0].x = 10; ptArray[0].y = 160;
ptArray[1].x = 60; ptArray[1].y = 60;
ptArray[2].x = 110; ptArray[2].y = 160;
Rgn3 = CreatePolygonRgn( ptArray,
sizeof(ptArray)/sizeof(POINT), ALTERNATE );
// Create a dummy region to combine into.
//.......................................
Rgn4 = CreateRectRgn( 0, 0, 10, 10 );
// Combine the elliptic and rectangular regions.
//..............................................
CombineRgn( Rgn4, Rgn2, Rgn1, RGN_OR );
// Combine the results with the polygon region.
//.............................................
CombineRgn( Rgn4, Rgn4, Rgn3, RGN_OR );
// Now create a hatched brush and draw the resulting region.
//..........................................................
lb.lbStyle = BS_HATCHED;
lb.lbColor = RGB(0, 0, 0);
lb.lbHatch = HS_DIAGCROSS;
hBrush = CreateBrushIndirect( &lb );
FillRgn( hDC, Rgn4, hBrush );
// Finally, delete all created GDI objects.
//..........................................
DeleteObject( hBrush );
DeleteObject( Rgn1 );
DeleteObject( Rgn2 );
DeleteObject( Rgn3 );
DeleteObject( Rgn4 );
ReleaseDC( hWnd, hDC );
}
break;
case IDM_ABOUT :
DialogBox( hInst, "AboutBox", hWnd, (DLGPROC)About );
break;
case IDM_EXIT :
DestroyWindow( hWnd );
break;
}
break;
case WM_DESTROY :
PostQuitMessage(0);
break;
default :
return( DefWindowProc( hWnd, uMsg, wParam, lParam ) );
}
return( 0L );
}
LRESULT CALLBACK About( HWND hDlg,
UINT message,
WPARAM wParam,
LPARAM lParam)
{
switch (message)
{
case WM_INITDIALOG:
return (TRUE);
case WM_COMMAND:
if ( LOWORD(wParam) == IDOK
|| LOWORD(wParam) == IDCANCEL)
{
EndDialog(hDlg, TRUE);
return (TRUE);
}
break;
}
return (FALSE);
}