screensave.c File Reference

#include <windows.h>
#include <windowsx.h>
#include <tchar.h>
#include "globals.h"
#include "message.h"
#include "matrix.h"
#include "resource.h"

Include dependency graph for screensave.c:

Go to the source code of this file.

Functions
	HMONITOR (WINAPI *pfnEnumDisplayMonitors)(HDC
	BOOL (WINAPI *pfnGetMonitorInfo)(HMONITOR
BOOL CALLBACK	MonitorEnumProc (HMONITOR hMonitor, HDC hdcMonitor, RECT *rcMonitor, LPARAM Param)
BOOL	ScreenSaver (HWND hwndParent)
VOID	ParseCommandLine (LPWSTR szCmdLine, UCHAR *chOption, HWND *hwndParent)
int CALLBACK	wWinMain (HINSTANCE hInst, HINSTANCE hPrev, LPWSTR lpCmdLine, int iCmdShow)

Variables
	LPCRECT
	MONITORENUMPROC
	LPARAM
	LPMONITORINFO

Function Documentation

BOOL()

BOOL

(

WINAPI *

pfnGetMonitorInfo

)

HMONITOR()

HMONITOR

(

WINAPI *

pfnEnumDisplayMonitors

)

MonitorEnumProc()

BOOL CALLBACK MonitorEnumProc	(	HMONITOR	hMonitor,
		HDC	hdcMonitor,
		RECT *	rcMonitor,
		LPARAM	Param
	)

Definition at line 33 of file screensave.c.

{
    HWND hwnd;

    // Create a screensaver on this monitor!
    hwnd = CreateScreenSaveWnd((HWND)Param, rcMonitor);

    // For some reason windows always places this window at 0,0...
    // position it ourselves
    SetWindowPos(hwnd, 0, rcMonitor->left, rcMonitor->top, 0, 0,
        SWP_NOZORDER|SWP_NOACTIVATE|SWP_NOSIZE|SWP_SHOWWINDOW);

    return TRUE;
}

Referenced by CDesktopBrowser::_Resize(), and ScreenSaver().

ParseCommandLine()

VOID ParseCommandLine	(	LPWSTR	szCmdLine,
		UCHAR *	chOption,
		HWND *	hwndParent
	)

Definition at line 103 of file screensave.c.

{
    UCHAR ch = *szCmdLine++;

    if(ch == '-' || ch == '/')
        ch = *szCmdLine++;

    if(ch >= 'A' && ch <= 'Z')
        ch += 'a' - 'A';        //convert to lower case

    *chOption = ch;
    ch = *szCmdLine++;

    if(ch == ':')
        ch = *szCmdLine++;

    while(ch == ' ' || ch == '\t')
        ch = *szCmdLine++;

    if(isdigit(ch))
    {
        ULONG_PTR i = _wtoi(szCmdLine - 1);
        *hwndParent = (HWND)i;
    }
    else
        *hwndParent = NULL;
}

Referenced by wWinMain().

ScreenSaver()

BOOL ScreenSaver

(

HWND

hwndParent

)

Definition at line 51 of file screensave.c.

{
    HMODULE     hUser32;
    UINT        nPreviousState;
    MSG         msg;

    InitScreenSaveClass(hwndParent);

    SystemParametersInfo(SPI_SETSCREENSAVERRUNNING, TRUE, &nPreviousState, 0);

    // Dynamically locate API call from USER32 - not present in all versions
    hUser32                 = GetModuleHandle(_T("USER32.DLL"));
    pfnEnumDisplayMonitors  = (PVOID)GetProcAddress(hUser32, "EnumDisplayMonitors");

    // If we're running Win2k+ then the API is available...so call it!
    if(pfnEnumDisplayMonitors && hwndParent == 0)
    {
        pfnEnumDisplayMonitors(NULL, NULL, MonitorEnumProc, 0);
    }
    // Otherwise simulate by calling enum-proc manually
    else
    {
        RECT rect;

        rect.left   = 0;
        rect.right  = GetSystemMetrics(SM_CXSCREEN);
        rect.top    = 0;
        rect.bottom = GetSystemMetrics(SM_CYSCREEN);

        MonitorEnumProc(NULL, NULL, &rect, (LPARAM)hwndParent);
    }

    // run message loop to handle all screen-saver windows
    while(GetMessage(&msg, NULL,0,0))
    {
        TranslateMessage(&msg);
        DispatchMessage(&msg);
    }

    SystemParametersInfo(SPI_SETSCREENSAVERRUNNING, FALSE, &nPreviousState, 0);

    return TRUE;
}

Referenced by wWinMain().

wWinMain()

int CALLBACK wWinMain	(	HINSTANCE	hInstance,
		HINSTANCE	hPrevInstance,
		LPWSTR	lpCmdLine,
		int	nShowCmd
	)

This file has no copyright assigned and is placed in the Public Domain. This file is part of the w64 mingw-runtime package. No warranty is given; refer to the file DISCLAIMER.PD within this package.

Definition at line 134 of file screensave.c.

{
    HWND   hwndParent;
    UCHAR  chOption;

    // Make sure that only 1 instance runs at a time -
    // Win98 seems to want us to restart every 5 seconds!!
    if(FindWindowEx(NULL, NULL, APPNAME, APPNAME))
    {
        return 0;
    }

    LoadSettings();

    ParseCommandLine(lpCmdLine, &chOption, &hwndParent);

    switch(chOption)
    {
    case 's':   return ScreenSaver(NULL);           // screen save
    case 'p':   return ScreenSaver(hwndParent);     // preview in small window
    case 'a':   return ChangePassword(hwndParent);  // ask for password
    case 'c':   return Configure(hwndParent);       // configuration dialog
    default:    return Configure(hwndParent);       // configuration dialog
    }

    return 0;
}

Variable Documentation

LPARAM

LPARAM

Definition at line 26 of file screensave.c.

LPCRECT

LPCRECT

Definition at line 26 of file screensave.c.

LPMONITORINFO

LPMONITORINFO

Definition at line 27 of file screensave.c.

MONITORENUMPROC

MONITORENUMPROC

Definition at line 26 of file screensave.c.