626 lines
18 KiB
C
626 lines
18 KiB
C
/******************************************************************************
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*
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* File: Starter.c
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*
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* Project: Example X
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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 "starter.rh" //MainForm definition
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#include "Trg.h"
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#include "Vga.h"
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#include "Silk.h"
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/***********************************************************************
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*
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* Entry Points
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*
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***********************************************************************/
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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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FontID currentFont = stdFont;
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Boolean vgaPresent = false;
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Boolean screenChanged = false;
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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_X'
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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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static void DrawHelloWorld(void);
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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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* REVISION HISTORY:
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*
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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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* REVISION HISTORY:
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*
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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: 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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* REVISION HISTORY:
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*
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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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frmP = FrmGetActiveForm();
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WinSetWindowBounds(FrmGetWindowHandle(frmP), &r);
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screenChanged = false;
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if (draw)
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DrawHelloWorld();
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}
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/***********************************************************************
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*
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* FUNCTION: DrawHelloWorld
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*
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* DESCRIPTION: This routine prints "Hello World" to the center of the
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* window.
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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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* REVISION HISTORY:
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*
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*
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***********************************************************************/
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static void DrawHelloWorld(void)
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{
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MemHandle resH;
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BitmapPtr resP;
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char *str = "Hello World";
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FontID savedFont;
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Coord x, y, winWidth, winHeight;
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FormPtr formP;
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UInt8 *ptr;
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formP = FrmGetActiveForm();
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/*------------------------------------------------------------------------
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* Lock the screen to remove flicker
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*----------------------------------------------------------------------*/
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ptr = WinScreenLock(winLockCopy);
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FrmEraseForm(formP);
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FrmDrawForm(formP);
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if (vgaPresent)
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resH = DmGetResource(bitmapRsc, VGAGlobeBitmap);
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else
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resH = DmGetResource(bitmapRsc, GlobeBitmap);
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ErrFatalDisplayIf(!resH, "Missing bitmap");
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resP = MemHandleLock(resH);
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WinGetDisplayExtent(&winWidth, &winHeight);
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savedFont = FntSetFont(currentFont);
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/*------------------------------------------------------------------------
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* Draw the globe graphic
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*----------------------------------------------------------------------*/
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x = (winWidth/2) - (resP->width/2);
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y = (winHeight/2) - (resP->height/2);
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WinDrawBitmap(resP, x, y);
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/*------------------------------------------------------------------------
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* Draw String below the globe
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*----------------------------------------------------------------------*/
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x = (winWidth/2) - (FntCharsWidth(str, StrLen(str))/2);
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y = y + resP->height + 5;
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WinDrawChars(str, StrLen(str), x, y);
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FntSetFont(savedFont);
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MemPtrUnlock(resP);
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DmReleaseResource(resH);
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if (ptr)
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WinScreenUnlock();
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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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* REVISION HISTORY:
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*
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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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currentFont = stdFont;
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if (vgaPresent)
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{
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currentFont = VgaBaseToVgaFont(currentFont);
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MainFormResize(frmP, false);
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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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* REVISION HISTORY:
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*
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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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FontID newFont;
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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 MainOptionsAboutExampleX:
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MenuEraseStatus(0);
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VgaGetScreenMode(&screenMode, &rotateMode);
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VgaSetScreenMode(screenModeScaleToFit, rotateMode);
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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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VgaSetScreenMode(screenMode, rotateMode);
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handled = true;
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break;
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case MainOptionsFont :
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newFont = FontSelect(currentFont);
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FrmEraseForm(FrmGetActiveForm ());
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currentFont = newFont;
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handled = true;
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break;
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}
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FrmUpdateForm (formID, frmRedrawUpdateCode);
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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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* REVISION HISTORY:
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*
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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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DrawHelloWorld();
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handled = true;
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break;
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case frmUpdateEvent :
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DrawHelloWorld();
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handled = true;
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break;
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case winEnterEvent:
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if (screenChanged && (FrmGetActiveFormID() == MainForm))
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MainFormResize(FrmGetActiveForm(), 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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* REVISION HISTORY:
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*
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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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* REVISION HISTORY:
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*
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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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* REVISION HISTORY:
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*
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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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UInt16 cardNo;
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LocalID appID;
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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 the 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); //some generic error for now
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}
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/*------------------------------------------------------------------------
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* Register for silk screen change notifications.
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* Note: You do not need to check for the presense of the silk extension to
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* register for its notifications. If the silk extension is not present
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* you simply will not receive any notifications.
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*----------------------------------------------------------------------*/
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SysCurAppDatabase(&cardNo, &appID);
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SysNotifyRegister(0, appID, trgNotifySilkEvent, NULL, sysNotifyNormalPriority, NULL);
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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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* REVISION HISTORY:
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*
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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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UInt16 cardNo;
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LocalID appID;
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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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* Unregister for silk screen change notifications
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*----------------------------------------------------------------------*/
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SysCurAppDatabase(&cardNo, &appID);
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SysNotifyUnregister(cardNo, appID, trgNotifySilkEvent, sysNotifyNormalPriority);
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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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* REVISION HISTORY:
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*
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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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error = AppStart();
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if (error)
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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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case sysAppLaunchCmdNotify : // HandEra popup silk screen
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if ( ((SysNotifyParamType *)cmdPBP)->notifyType == trgNotifySilkEvent)
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{
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if ((FrmGetActiveFormID() == MainForm) && FrmVisible(FrmGetActiveForm()))
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MainFormResize(FrmGetActiveForm(), true);
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else
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screenChanged = true;
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}
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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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