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TSCRNSAV.CPP
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1993-06-25
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// ObjectWindows - (C) Copyright 1992 by Borland International
//
// tscrnsav.cpp
//
// Modified by Philip VanBaren (71214,2302 or phillipv@engin.umich.edu)
// to enable the screen saver to work with NDW's Sleeper program.
//
// The main modifications are:
// 1) Window class is "WindowsScreenSaverClass" (this is required for the
// saver to work properly with Sleeper.
// 2) IdleAction does screen saver things on only 1 out of 100 calls,
// thereby allowing background events (backups, printing, etc.) to
// retain most of the processing power when they need it.
// 3) "-c", "/c", "c", "-s", "/s", "s", and "" are accepted as valid command
// line parameters. (Sleeper passes "c" and "-s" to start the configure
// and saver routines, respectively.)
// 4) Allow some slop in mouse movement before aborting the screen saver,
// so that the screen saver doesn't abort whenever the desk is bumped.
#include <owl.h>
#include <ctype.h>
#include "tscrnsav.h"
#ifndef SC_SCREENSAVE
#define SC_SCREENSAVE 0xF140
#endif
TScrnSavWindow::TScrnSavWindow( PTWindowsObject AParent, LPSTR ATitle,
PTModule AModule ) :
TWindow( AParent, ATitle, AModule )
{
/*
* Hide the cursor.
*/
while(ShowCursor( FALSE ) >= 0);
Attr.Style = WS_POPUP;
}
TScrnSavWindow::~TScrnSavWindow()
{
ShowCursor( TRUE );
}
void TScrnSavWindow::GetWindowClass( WNDCLASS & AWndClass )
{
TWindow::GetWindowClass( AWndClass );
AWndClass.hIcon = ( HICON )NULL;
AWndClass.style |= CS_SAVEBITS;
AWndClass.hbrBackground = ( HBRUSH )GetStockObject( NULL_BRUSH );
}
void TScrnSavWindow::SetupWindow( void )
{
RECT rc;
TWindow::SetupWindow();
GetCursorPos( &prevPt );
GetWindowRect( GetDesktopWindow(), &rc );
MoveWindow( HWindow, rc.left, rc.top, rc.right, rc.bottom, TRUE );
}
void TScrnSavWindow::DefWndProc( RTMessage msg )
{
switch( msg.Message )
{
case WM_MOUSEMOVE:
/*
* If the mouse moves more than 10 pixels,
* abort the screen saver.
* This allows for some slop so that bumping the desk
* will not abort the screen saver.
*/
if ( (abs(MAKEPOINT( msg.LParam ).x-prevPt.x)
+abs(MAKEPOINT( msg.LParam ).y-prevPt.y)) < 10 )
break;
case WM_ACTIVATE:
case WM_ACTIVATEAPP:
if ( msg.WParam != 0 )
break;
case WM_KEYDOWN:
case WM_SYSKEYDOWN:
case WM_LBUTTONDOWN:
case WM_MBUTTONDOWN:
case WM_RBUTTONDOWN:
PostMessage( HWindow, WM_CLOSE, 0, 0L );
default:
break;
}
TWindow::DefWndProc( msg );
}
void TScrnSavWindow::WMSysCommand( RTMessage msg )
{
if (( msg.WParam & 0xFFF0 ) == SC_SCREENSAVE )
{
msg.Result = TRUE;
}
else
DefWndProc( msg );
}
void TScrnSavWindow::AnimateScreen()
{}
void TScrnSavApp::InitMainWindow()
{
int cmdswitch;
cmdswitch=toupper(lpCmdLine[0]);
if((cmdswitch == '/') || (cmdswitch == '-'))
cmdswitch=toupper(lpCmdLine[1]);
if(cmdswitch == 'S')
{
fConfigureFlag = FALSE;
InitScrnSavWindow();
if ( pScrnSavWnd )
MainWindow = pScrnSavWnd;
}
else
{
fConfigureFlag = TRUE;
InitConfigDialog();
if ( pConfigureDialog )
MainWindow = pConfigureDialog;
}
}
void TScrnSavApp::InitScrnSavWindow()
{
pScrnSavWnd = new TScrnSavWindow( NULL, NULL, NULL );
j=0;
}
void TScrnSavApp::IdleAction()
{
if ( fConfigureFlag == FALSE && pScrnSavWnd != NULL )
{
/*
* Only allow screen saver to use 1% of available time so that
* background processing (such as printing) is not slowed down.
*/
j++;
if(j>100)
{
pScrnSavWnd->AnimateScreen();
j=0;
}
}
}