307 lines
9.5 KiB
C
307 lines
9.5 KiB
C
/******************************************************************************
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*
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* File: Starter.c
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*
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* Project : Example H
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*
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*****************************************************************************/
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#include <PalmOS.h>
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#include <NotifyMgr.h>
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#include "StarterRsc.h"
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#include "Vga.h"
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#include "MainForm.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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/***********************************************************************
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*
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* Global variables
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*
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***********************************************************************/
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typedef StarterAppInfoType* StarterAppInfoPtr;
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Boolean vgaPresent = false;
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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_H'
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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 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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* 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: 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:
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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 to see if VGA extension present
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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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vgaPresent = false;
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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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***********************************************************************/
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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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