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/** \file
* \brief Windows Message Loop
*
* See Copyright Notice in "iup.h"
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <windows.h>
#include "iup.h"
#include "iupcbs.h"
#include "iup_object.h"
#include "iup_attrib.h"
#include "iup_str.h"
#include "iupwin_drv.h"
#include "iupwin_handle.h"
static IFidle win_idle_cb = NULL;
static int win_main_loop = 0;
void iupdrvSetIdleFunction(Icallback f)
{
win_idle_cb = (IFidle)f;
}
static int winLoopCallIdle(void)
{
int ret = win_idle_cb();
if (ret == IUP_CLOSE)
{
win_idle_cb = NULL;
return IUP_CLOSE;
}
if (ret == IUP_IGNORE)
win_idle_cb = NULL;
return ret;
}
void IupExitLoop(void)
{
PostQuitMessage(0);
}
static int winLoopProcessMessage(MSG* msg)
{
if (msg->message == WM_QUIT) /* IUP_CLOSE returned in a callback or IupHide in a popup dialog or all dialogs closed */
return IUP_CLOSE;
else
{
TranslateMessage(msg);
DispatchMessage(msg);
return IUP_DEFAULT;
}
}
int IupMainLoopLevel(void)
{
return win_main_loop;
}
int IupMainLoop(void)
{
MSG msg;
int ret;
win_main_loop++;
do
{
if (win_idle_cb)
{
ret = 1;
if (PeekMessage(&msg, 0, 0, 0, PM_REMOVE))
{
if (winLoopProcessMessage(&msg) == IUP_CLOSE)
{
win_main_loop--;
return IUP_CLOSE;
}
}
else
{
if (winLoopCallIdle() == IUP_CLOSE)
{
win_main_loop--;
return IUP_CLOSE;
}
}
}
else
{
ret = GetMessage(&msg, NULL, 0, 0);
if (ret == -1) /* error */
{
win_main_loop--;
return IUP_ERROR;
}
if (ret == 0 || /* WM_QUIT */
winLoopProcessMessage(&msg) == IUP_CLOSE) /* ret != 0 */
{
win_main_loop--;
return IUP_NOERROR;
}
}
} while (ret);
win_main_loop--;
return IUP_NOERROR;
}
int IupLoopStepWait(void)
{
MSG msg;
int ret = GetMessage(&msg, NULL, 0, 0);
if (ret == -1) /* error */
return IUP_ERROR;
if (ret == 0 || /* WM_QUIT */
winLoopProcessMessage(&msg) == IUP_CLOSE) /* ret != 0 */
return IUP_CLOSE;
return IUP_DEFAULT;
}
int IupLoopStep(void)
{
MSG msg;
if (PeekMessage(&msg, 0, 0, 0, PM_REMOVE))
return winLoopProcessMessage(&msg);
else if (win_idle_cb)
return winLoopCallIdle();
return IUP_DEFAULT;
}
void IupFlush(void)
{
int post_quit = 0;
MSG msg;
while (PeekMessage(&msg, 0, 0, 0, PM_REMOVE))
{
if (winLoopProcessMessage(&msg) == IUP_CLOSE)
{
post_quit = 1;
break;
}
}
/* re post the quit message if still inside MainLoop */
if (post_quit && win_main_loop>0)
PostQuitMessage(0);
}
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