Added a fe comments to explain multi-monitor support on Win32 better.

git-svn-id: file:///fltk/svn/fltk/branches/branch-1.1@5574 ea41ed52-d2ee-0310-a9c1-e6b18d33e121
This commit is contained in:
Matthias Melcher 2007-01-01 18:29:20 +00:00
parent 2c16ddb964
commit 230a2a4332

View File

@ -40,6 +40,14 @@ static int num_screens = 0;
# include <multimon.h>
# endif // !HMONITOR_DECLARED && _WIN32_WINNT < 0x0500
// We go the much more difficult route of individually picking some multi-screen
// functions from the USER32.DLL . If these functions are not available, we
// will gracefully fall back to single monitor support.
//
// If we were to insist on the existence of "EnumDisplayMonitors" and
// "GetMonitorInfoA", it would be impossible to use FLTK on Windows 2000
// before SP2 or earlier.
// BOOL EnumDisplayMonitors(HDC, LPCRECT, MONITORENUMPROC, LPARAM)
typedef BOOL (WINAPI* fl_edm_func)(HDC, LPCRECT, MONITORENUMPROC, LPARAM);
// BOOL GetMonitorInfo(HMONITOR, LPMONITORINFO)
@ -56,6 +64,7 @@ static BOOL CALLBACK screen_cb(HMONITOR mon, HDC, LPRECT r, LPARAM) {
mi.cbSize = sizeof(mi);
// GetMonitorInfo(mon, &mi);
// (but we use our self-aquired function pointer instead)
if (fl_gmi(mon, &mi)) {
screens[num_screens] = mi.rcWork;
num_screens ++;
@ -84,6 +93,7 @@ static void screen_init() {
// We have GetMonitorInfoA, enumerate all the screens...
num_screens = 0;
// EnumDisplayMonitors(0,0,screen_cb,0);
// (but we use our self-aquired function pointer instead)
fl_edm(0, 0, screen_cb, 0);
return;
}