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Screen Savers
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DarkSide 4.0
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FaderShell
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Invert.c
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1993-06-01
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/*
DarkSide 3.0 - a 7.0 dependant, system clean expandable screen saver.
copyright © 1990, 1991, 1992 by Tom Dowdy
All rights reserved.
This is a simple fader that shows how to create a fader for DarkSide.
*/
#include <Memory.h>
#include <Windows.h>
#include <Dialogs.h>
#include <Errors.h>
#include "Fader.h"
/* ------------------------------------------------------------------------ */
/* GLOBAL VARIABLES */
/* ------------------------------------------------------------------------ */
long gNextInvert; // next time to invert the screens
/* ------------------------------------------------------------------------ */
OSErr PreflightFader(MachineInfoPtr, long *minTicks, long *maxTicks)
/*
Called when fader is starting up - before window has been created
*/
{
// no need to go faster than this!
*minTicks = 1;
*maxTicks = 15;
return(noErr);
} // PreflightFader
/* ------------------------------------------------------------------------ */
OSErr InitializeFader(MachineInfoPtr machineInfo)
/*
Called when fader is starting up - after window has been created
*/
{
short screenIndex;
ScreenInfoPtr pScreen;
pScreen = &machineInfo->theScreens[0];
for (screenIndex = 0; screenIndex < machineInfo->numScreens; ++screenIndex)
{
PaintRect(&pScreen->bounds);
++pScreen;
}
gNextInvert = TickCount();
return(noErr);
} // InitializeFader
/* ------------------------------------------------------------------------ */
OSErr IdleFader(MachineInfoPtr machineInfo)
/*
Called during idle time for the fader
*/
{
short screenIndex;
ScreenInfoPtr pScreen;
if (TickCount() > gNextInvert)
{
pScreen = &machineInfo->theScreens[0];
for (screenIndex = 0; screenIndex < machineInfo->numScreens; ++screenIndex)
{
if (Random() & 0x01)
InvertRect(&pScreen->bounds);
++pScreen;
}
gNextInvert = TickCount()
+ (9-machineInfo->faderSettings->theShorts[0]) * 10;
}
return(noErr);
} // IdleFader
/* ------------------------------------------------------------------------ */
OSErr DisposeFader(MachineInfoPtr )
/*
Called when the fade is tearing down
*/
{
return(noErr);
} // DisposeFader
/* ------------------------------------------------------------------------ */
OSErr UpdateFader(MachineInfoPtr machineInfo)
/*
Called when there is an update event for our fade window.
*/
{
// erase the screen
InitializeFader(machineInfo);
return(noErr);
} // UpdateFader
/* ------------------------------------------------------------------------ */
OSErr HitFader(MachineInfoPtr machineInfo, DialogPtr dPtr, short itemHit, short itemOffset)
/*
Called when there is an event in the settings dialog. itemHit will be
the item the user has selected, or 0 when the dialog is being set up.
itemHit - itemOffset will allow you to determine which item in your dialog
list this corresponds to.
If you don't wish to do any special processing of this event, simply return
"fnfErr" and the standard effect will take place.
WARNING: Your A5 world may not be set up at this point, so don't try to use
your global variables!!!
*/
{
#pragma unused (machineInfo, dPtr, itemHit, itemOffset)
return(fnfErr);
} // HitFader