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Added uiMainStep() and implemented it on Windows.

This commit is contained in:
Pietro Gagliardi 2016-05-24 22:14:05 -04:00
parent c349edda5e
commit a9e731ed59
2 changed files with 63 additions and 20 deletions
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1
ui.h
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@ -36,6 +36,7 @@ _UI_EXTERN void uiUninit(void);
_UI_EXTERN void uiFreeInitError(const char *err);
_UI_EXTERN void uiMain(void);
_UI_EXTERN int uiMainStep(int wait);
_UI_EXTERN void uiQuit(void);
_UI_EXTERN void uiQueueMain(void (*f)(void *data), void *data);

82
windows/main.cpp
View File

@ -41,31 +41,73 @@ void unregisterMessageFilter(void)
logLastError(L"error unregistering libui message filter");
}
// TODO http://blogs.msdn.com/b/oldnewthing/archive/2005/04/08/406509.aspx when adding accelerators, TranslateAccelerators() before IsDialogMessage()
// LONGTERM http://blogs.msdn.com/b/oldnewthing/archive/2005/04/08/406509.aspx when adding accelerators, TranslateAccelerators() before IsDialogMessage()
static void processMessage(MSG *msg)
{
HWND active;
// TODO really active? or parentToplevel(msg->hwnd)?
active = GetActiveWindow();
if (active != NULL)
// TODO find documentation that says IsDialogMessage() calls CallMsgFilter() for us, because that's what's happening
if (IsDialogMessage(active, msg) != 0)
return;
TranslateMessage(msg);
DispatchMessageW(msg);
}
static int waitMessage(MSG *msg)
{
int res;
res = GetMessageW(msg, NULL, 0, 0);
if (res < 0) {
logLastError(L"error calling GetMessage()");
return 0; // bail out on error
}
return res != 0; // returns false on WM_QUIT
}
void uiMain(void)
{
MSG msg;
int res;
HWND active;
while (uiMainStep(1))
;
}
for (;;) {
res = GetMessageW(&msg, NULL, 0, 0);
if (res < 0) {
logLastError(L"error calling GetMessage()");
break; // bail out on error
}
if (res == 0) // WM_QUIT
break;
// TODO really active? or parentToplevel(msg->hwnd)?
active = GetActiveWindow();
if (active != NULL)
// TODO find documentation that says IsDialogMessage() calls CallMsgFilter() for us, because that's what's happening
if (IsDialogMessage(active, &msg) != 0)
continue;
TranslateMessage(&msg);
DispatchMessageW(&msg);
static int peekMessage(MSG *msg)
{
BOOL res;
res = PeekMessageW(msg, NULL, 0, 0, PM_REMOVE);
if (res == 0)
return 2; // no message available
if (msg->message != WM_QUIT)
return 1; // a message
return 0; // WM_QUIT
}
int uiMainStep(int wait)
{
MSG msg;
if (wait) {
if (!waitMessage(&msg))
return 0;
processMessage(&msg);
return 1;
}
// don't wait for a message
switch (peekMessage(&msg)) {
case 0: // quit
// TODO PostQuitMessage() again?
return 0;
case 1: // process a message
processMessage(&msg);
// fall out to the case for no message
}
return 1; // no message
}
void uiQuit(void)