598 lines
17 KiB
C
598 lines
17 KiB
C
/******************************************************************************
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*
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* File: Starter.c
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*
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* Project : Example L
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*
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*****************************************************************************/
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#include <PalmOS.h>
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#include "StarterRsc.h"
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#include "Vga.h"
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#include "TrgRsc.h"
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/***********************************************************************
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*
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* Internal Structures
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*
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***********************************************************************/
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typedef struct
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{
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UInt8 replaceme;
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} StarterPreferenceType;
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typedef struct
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{
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UInt8 replaceme;
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} StarterAppInfoType;
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typedef StarterAppInfoType* StarterAppInfoPtr;
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typedef struct
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{
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LocalID dbID;
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UInt32 creator;
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} db_type;
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/***********************************************************************
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*
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* Global variables
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*
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***********************************************************************/
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/***********************************************************************
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*
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* Internal Constants
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*
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***********************************************************************/
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#define appFileCreator 'Ex_L'
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#define appVersionNum 0x01
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#define appPrefID 0x00
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#define appPrefVersionNum 0x01
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#define appLrgIconID 1000
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#define appSmallIconID 1001
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#define maxDbs 50
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// Define the minimum OS version we support (2.0 for now).
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#define ourMinVersion sysMakeROMVersion(2,0,0,sysROMStageRelease,0)
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/***********************************************************************
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*
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* Internal Functions
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*
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***********************************************************************/
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/***********************************************************************
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*
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* Local variables
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*
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***********************************************************************/
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static Boolean vgaPresent = false;
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static db_type db[maxDbs];
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static Int16 numDbs;
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/***********************************************************************
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*
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* FUNCTION: RomVersionCompatible
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*
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* DESCRIPTION: This routine checks that a ROM version is meet your
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* minimum requirement.
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*
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* PARAMETERS: requiredVersion - minimum rom version required
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* (see sysFtrNumROMVersion in SystemMgr.h
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* for format)
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* launchFlags - flags that indicate if the application
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* UI is initialized.
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*
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* RETURNED: error code or zero if rom is compatible
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*
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***********************************************************************/
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static Err RomVersionCompatible(UInt32 requiredVersion, UInt16 launchFlags)
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{
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UInt32 romVersion;
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/*------------------------------------------------------------------------
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* See if we're on in minimum required version of the ROM or later.
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*----------------------------------------------------------------------*/
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FtrGet(sysFtrCreator, sysFtrNumROMVersion, &romVersion);
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if (romVersion < requiredVersion)
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{
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if ((launchFlags & (sysAppLaunchFlagNewGlobals | sysAppLaunchFlagUIApp)) ==
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(sysAppLaunchFlagNewGlobals | sysAppLaunchFlagUIApp))
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{
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FrmAlert (RomIncompatibleAlert);
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/*------------------------------------------------------------------------
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* Palm OS 1.0 will continuously relaunch this app unless we switch to
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* another safe one.
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*----------------------------------------------------------------------*/
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if (romVersion < ourMinVersion)
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{
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AppLaunchWithCommand(sysFileCDefaultApp, sysAppLaunchCmdNormalLaunch, NULL);
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}
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}
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return sysErrRomIncompatible;
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}
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return errNone;
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}
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/***********************************************************************
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*
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* FUNCTION: GetObjectPtr
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*
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* DESCRIPTION: This routine returns a pointer to an object in the current
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* form.
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*
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* PARAMETERS: formId - id of the form to display
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*
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* RETURNED: void *
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*
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***********************************************************************/
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static void * GetObjectPtr(UInt16 objectID)
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{
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FormPtr frmP;
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frmP = FrmGetActiveForm();
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return(FrmGetObjectPtr(frmP, FrmGetObjectIndex(frmP, objectID)));
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}
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/***********************************************************************
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*
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* FUNCTION: LoadDbs
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*
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* DESCRIPTION:
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*
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* PARAMETERS:
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*
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* RETURNED:
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*
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***********************************************************************/
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static void LoadDbs(void)
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{
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DmSearchStateType search;
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LocalID dbID;
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UInt32 creator;
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Err err;
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err = DmGetNextDatabaseByTypeCreator(true, &search, 'appl', 0, true, 0, &dbID);
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for (numDbs = 0; (err == errNone) && (numDbs < maxDbs); numDbs++)
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{
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DmDatabaseInfo(0, dbID, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, &creator);
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db[numDbs].dbID = dbID;
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db[numDbs].creator = creator;
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err = DmGetNextDatabaseByTypeCreator(false, &search, 'appl', 0, true, 0, &dbID);
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}
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}
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/***********************************************************************
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*
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* FUNCTION: DrawLargeVgaIcon
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*
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* DESCRIPTION:
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*
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* PARAMETERS:
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*
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* RETURNED:
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*
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***********************************************************************/
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static void DrawLargeVgaIcon(LocalID dbID, UInt32 creator, Coord x, Coord y)
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{
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DmOpenRef appDB = NULL;
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BitmapPtr iconP = NULL;
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MemHandle iconH = NULL;
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/*-------------------------------------------------------------------------
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* First look for icons in VGA Resource Database, if not found look in the
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* app itself.
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*------------------------------------------------------------------------*/
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if ((appDB = DmOpenDatabaseByTypeCreator(vgaResourceDbType, creator, dmModeReadOnly)) == NULL)
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appDB = DmOpenDatabase(0, dbID, dmModeReadOnly);
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if(appDB != NULL)
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{
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/*-------------------------------------------------------------------------
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* If 32x32 exists, use it, otherwise expand the 22x22 icon
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*------------------------------------------------------------------------*/
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if ((iconH = DmGet1Resource(iconType, vgaAppIconID)) != NULL)
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{
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iconP = MemHandleLock(iconH);
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WinDrawBitmap(iconP, x, y);
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MemHandleUnlock(iconH);
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DmReleaseResource(iconH);
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}
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else if ((iconH = DmGet1Resource(iconType, appLrgIconID)) != NULL)
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{
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iconP = MemHandleLock(iconH);
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VgaWinDrawBitmapExpanded(iconP, x, y);
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MemHandleUnlock(iconH);
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DmReleaseResource(iconH);
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}
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DmCloseDatabase(appDB);
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}
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/*------------------------------------------------------------------------
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* Draw Default Icon - Left as an exercise for the reader
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*----------------------------------------------------------------------*/
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}
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/***********************************************************************
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*
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* FUNCTION: MainFormResize
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*
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* DESCRIPTION:
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*
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* PARAMETERS:
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*
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* RETURNED:
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*
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***********************************************************************/
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static void MainFormResize(FormPtr frmP, Boolean draw)
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{
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Coord x,y;
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RectangleType r;
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WinGetDisplayExtent(&x, &y);
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RctSetRectangle(&r, 0, 0, x, y);
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WinSetWindowBounds(FrmGetWindowHandle(frmP), &r);
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}
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/***********************************************************************
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*
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* FUNCTION: MainFormInit
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*
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* DESCRIPTION: This routine initializes the MainForm form.
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*
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* PARAMETERS: frm - pointer to the MainForm form.
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*
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* RETURNED: nothing
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*
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***********************************************************************/
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static void MainFormInit(FormPtr frmP)
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{
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if (vgaPresent)
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{
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VgaFormModify(frmP, vgaFormModify160To240);
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MainFormResize(frmP, false);
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}
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LoadDbs();
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}
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/***********************************************************************
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*
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* FUNCTION: MainFormDrawIcons
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*
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* DESCRIPTION: Draw the first n icons on the screen. Do not worry about
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* cosmetic appearance.
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*
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* PARAMETERS:
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*
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* RETURNED: Nohting
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*
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***********************************************************************/
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static void MainFormDrawIcons(void)
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{
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Int16 index = 0;
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Coord x,y;
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for (y = 30; y < 210; y+=50)
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{
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for (x = 10; x < 210; x += 50)
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{
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DrawLargeVgaIcon(db[index].dbID, db[index].creator, x, y);
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index++;
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if (index == numDbs)
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return;
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}
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}
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}
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/***********************************************************************
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*
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* FUNCTION: MainFormDoCommand
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*
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* DESCRIPTION: This routine performs the menu command specified.
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*
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* PARAMETERS: command - menu item id
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*
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* RETURNED: nothing
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*
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***********************************************************************/
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static Boolean MainFormDoCommand(UInt16 command)
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{
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Boolean handled = false;
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UInt16 formID;
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FormPtr frmP;
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VgaScreenModeType screenMode;
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VgaRotateModeType rotateMode;
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formID = (FrmGetFormId (FrmGetActiveForm ()));
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switch (command)
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{
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case MainOptionsAboutExampleL:
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MenuEraseStatus(0);
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if (vgaPresent)
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{
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VgaGetScreenMode(&screenMode, &rotateMode);
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VgaSetScreenMode(screenModeScaleToFit, rotateMode);
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}
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frmP = FrmInitForm (AboutForm);
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FrmDoDialog (frmP); // Display the About Box.
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FrmDeleteForm (frmP);
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if (vgaPresent)
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VgaSetScreenMode(screenMode, rotateMode);
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handled = true;
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break;
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}
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return(handled);
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}
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/***********************************************************************
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*
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* FUNCTION: MainFormHandleEvent
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*
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* DESCRIPTION: This routine is the event handler for the
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* "MainForm" of this application.
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*
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* PARAMETERS: eventP - a pointer to an EventType structure
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*
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* RETURNED: true if the event has handle and should not be passed
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* to a higher level handler.
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*
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***********************************************************************/
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static Boolean MainFormHandleEvent(EventPtr eventP)
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{
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Boolean handled = false;
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FormPtr frmP;
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switch (eventP->eType)
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{
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case menuEvent:
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return MainFormDoCommand(eventP->data.menu.itemID);
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case frmOpenEvent:
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frmP = FrmGetActiveForm();
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MainFormInit( frmP);
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FrmDrawForm ( frmP);
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MainFormDrawIcons();
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handled = true;
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break;
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default:
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break;
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}
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return(handled);
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}
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/***********************************************************************
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*
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* FUNCTION: AppHandleEvent
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*
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* DESCRIPTION: This routine loads form resources and set the event
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* handler for the form loaded.
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*
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* PARAMETERS: event - a pointer to an EventType structure
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*
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* RETURNED: true if the event has handle and should not be passed
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* to a higher level handler.
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*
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***********************************************************************/
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static Boolean AppHandleEvent(EventPtr eventP)
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{
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UInt16 formId;
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FormPtr frmP;
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if (eventP->eType == frmLoadEvent)
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{
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/*------------------------------------------------------------------------
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* Load the form resource.
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*----------------------------------------------------------------------*/
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formId = eventP->data.frmLoad.formID;
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frmP = FrmInitForm(formId);
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FrmSetActiveForm(frmP);
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/*------------------------------------------------------------------------
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* Set the event handler for the form. The handler of the currently
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* active form is called by FrmHandleEvent each time is receives an event.
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*----------------------------------------------------------------------*/
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switch (formId)
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{
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case MainForm:
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FrmSetEventHandler(frmP, MainFormHandleEvent);
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break;
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default:
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ErrFatalDisplay("Invalid Form Load Event");
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break;
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}
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return(true);
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}
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return(false);
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}
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/***********************************************************************
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*
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* FUNCTION: AppEventLoop
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*
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* DESCRIPTION: This routine is the event loop for the application.
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*
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* PARAMETERS: nothing
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*
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* RETURNED: nothing
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*
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***********************************************************************/
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static void AppEventLoop(void)
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{
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UInt16 error;
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EventType event;
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do
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{
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EvtGetEvent(&event, evtWaitForever);
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if (! SysHandleEvent(&event))
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if (! MenuHandleEvent(0, &event, &error))
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if (! AppHandleEvent(&event))
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FrmDispatchEvent(&event);
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} while (event.eType != appStopEvent);
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}
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/***********************************************************************
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*
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* FUNCTION: AppStart
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*
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* DESCRIPTION: Get the current application's preferences.
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*
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* PARAMETERS: nothing
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*
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* RETURNED: Err value 0 if nothing went wrong
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*
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***********************************************************************/
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static Err AppStart(void)
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{
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StarterPreferenceType prefs;
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UInt16 prefsSize;
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UInt32 version;
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/*------------------------------------------------------------------------
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* Read the saved preferences / saved-state information.
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*----------------------------------------------------------------------*/
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prefsSize = sizeof(StarterPreferenceType);
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if (PrefGetAppPreferences(appFileCreator, appPrefID, &prefs, &prefsSize, true) !=
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noPreferenceFound)
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{
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}
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/*------------------------------------------------------------------------
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* Check for VGA Extension
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*----------------------------------------------------------------------*/
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if (_TRGVGAFeaturePresent(&version))
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vgaPresent = true;
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else
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{
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FrmAlert(VgaNotFoundAlert);
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vgaPresent = false;
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return(-1);
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}
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return(errNone);
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}
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/***********************************************************************
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*
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* FUNCTION: AppStop
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*
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* DESCRIPTION: Save the current state of the application.
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*
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* PARAMETERS: nothing
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*
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* RETURNED: nothing
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*
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***********************************************************************/
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static void AppStop(void)
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{
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StarterPreferenceType prefs;
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/*------------------------------------------------------------------------
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* Write the saved preferences / saved-state information. This data
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* will be backed up during a HotSync.
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*----------------------------------------------------------------------*/
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PrefSetAppPreferences (appFileCreator, appPrefID, appPrefVersionNum,
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&prefs, sizeof (prefs), true);
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/*------------------------------------------------------------------------
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* Close all the open forms.
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*----------------------------------------------------------------------*/
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FrmCloseAllForms ();
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}
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/***********************************************************************
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*
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* FUNCTION: StarterPalmMain
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*
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* DESCRIPTION: This is the main entry point for the application.
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*
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* PARAMETERS: cmd - word value specifying the launch code.
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* cmdPB - pointer to a structure that is associated with the launch code.
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* launchFlags - word value providing extra information about the launch.
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*
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* RETURNED: Result of launch
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*
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***********************************************************************/
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static UInt32 StarterPalmMain(UInt16 cmd, MemPtr cmdPBP, UInt16 launchFlags)
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{
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Err error;
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if ((error = RomVersionCompatible (ourMinVersion, launchFlags)) != 0)
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return (error);
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switch (cmd)
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{
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case sysAppLaunchCmdNormalLaunch:
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if ((error = AppStart()) != errNone)
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return(error);
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if (vgaPresent)
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VgaSetScreenMode(screenMode1To1, rotateModeNone);
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FrmGotoForm(MainForm);
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AppEventLoop();
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AppStop();
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break;
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default:
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break;
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}
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return(errNone);
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}
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/***********************************************************************
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*
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* FUNCTION: PilotMain
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*
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* DESCRIPTION: This is the main entry point for the application.
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*
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* PARAMETERS: cmd - word value specifying the launch code.
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* cmdPB - pointer to a structure that is associated with the launch code.
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* launchFlags - word value providing extra information about the launch.
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* RETURNED: Result of launch
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*
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* REVISION HISTORY:
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*
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*
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***********************************************************************/
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UInt32 PilotMain( UInt16 cmd, MemPtr cmdPBP, UInt16 launchFlags)
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{
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return StarterPalmMain(cmd, cmdPBP, launchFlags);
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}
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