downloadbmp.c

brew 用IWEB接口来实现下载图片的一个列子

/*===========================================================================

FILE: downloadbmp.c
===========================================================================*/


/*===============================================================================
INCLUDES AND VARIABLE DEFINITIONS
=============================================================================== */
#include "AEE.h"       /* Standard AEE declarations */
#include "AEEModGen.h"          // Module interface definitions
#include "AEEAppGen.h"          // Applet interface definitions
#include "AEEShell.h"           // Shell interface definitions
#include "AEEFile.h"			// File interface definitions
#include "AEENet.h"				// Socket interface definitions
#include "AEESound.h"			// Sound Interface definitions
#include "AEEMenu.h"
#include "AEEHtmlViewer.h"
#include "AEEText.h"  /* AEE Text control */
#include "AEEWeb.h"
#include "AEEStdLib.h"
#include "downloadbmp.bid"
#include "downloadbmp.h"
#include "downloadbmp_res.h"
/*-------------------------------------------------------------------
Function Prototypes
-------------------------------------------------------------------*/
static boolean downloadbmp_HandleEvent(CDBApp * pApp, AEEEvent eCode, 
                                      uint16 wParam, uint32 dwParam);
static void DB_NotifyCB( void* pvUser, HViewNotify* pNotify );
static void DB_GoTo(CDBApp *pApp, const char *pszURL);
static void StrReplace(char **ppsz, const char *pszNew);
static void DB_DisplayMenu(CDBApp* pApp, const char *pszURL);
static boolean  DB_InitAppData(CDBApp * pApp);
static boolean DB_CreateMainControls( CDBApp* pApp );
static void WebAction_Start(WebAction *pwa, char *pszUrl);
static void WebAction_GotResp(void *p);
static void WebAction_Header(void *p, const char *cpszName, GetLine *pglVal);
static void WebAction_Status(void *p, WebStatus ws, void *pVal);
static void WebAction_Stop(WebAction *pwa);
static void WebAction_ReadLines(void *p);
static void ReleaseObj(void ** ppObj);
static void ND_Print(CDBApp *pApp, char *pszFmt, ...);
static void ND_StartTest(CDBApp* pApp, const char* pszSubmit);
static DB_WriteFile(CDBApp * pApp,char *file,int32 p,int32 length);
static boolean  DB_LoadBMPFromBMPFile(CDBApp*pApp);
static void StartProgressDisplay(CDBApp *pApp);
/*===============================================================================
FUNCTION DEFINITIONS
=============================================================================== */

/*===========================================================================

FUNCTION: AEEClsCreateInstance

DESCRIPTION
	This function is invoked while the app is being loaded. All Modules must provide this 
	function. Ensure to retain the same name and parameters for this function.
	In here, the module must verify the ClassID and then invoke the AEEApplet_New() function
	that has been provided in AEEAppGen.c. 

   After invoking AEEApplet_New(), this function can do app specific initialization. In this
   example, a generic structure is provided so that app developers need not change app specific
   initialization section every time except for a call to IDisplay_InitAppData(). 
   This is done as follows: InitAppData() is called to initialize AppletData 
   instance. It is app developers responsibility to fill-in app data initialization 
   code of InitAppData(). App developer is also responsible to release memory 
   allocated for data contained in AppletData -- this can be done in 
   IDisplay_FreeAppData().

PROTOTYPE:
   int AEEClsCreateInstance(AEECLSID ClsId,IShell * pIShell,IModule * po,void ** ppObj)

PARAMETERS:
	clsID: [in]: Specifies the ClassID of the applet which is being loaded

	pIShell: [in]: Contains pointer to the IShell object. 

	pIModule: pin]: Contains pointer to the IModule object to the current module to which
	this app belongs

	ppObj: [out]: On return, *ppObj must point to a valid IApplet structure. Allocation
	of memory for this structure and initializing the base data members is done by AEEApplet_New().

DEPENDENCIES
  none

RETURN VALUE
  AEE_SUCCESS: If the app needs to be loaded and if AEEApplet_New() invocation was
     successful
  EFAILED: If the app does not need to be loaded or if errors occurred in 
     AEEApplet_New(). If this function returns FALSE, the app will not be loaded.

SIDE EFFECTS
  none
===========================================================================*/
int AEEClsCreateInstance(AEECLSID ClsId,IShell * pIShell,IModule * po,void ** ppObj)
{
   CDBApp*pApp = NULL;
		
   if(ClsId == AEECLSID_DOWNLOADBMP){
      if(AEEApplet_New(sizeof(CDBApp), ClsId, pIShell,po,(IApplet**)ppObj,
         (AEEHANDLER)downloadbmp_HandleEvent,NULL)
         == TRUE)
      {
		  pApp=(CDBApp*)*ppObj;
		  if(!DB_InitAppData(pApp))
		  {
			   IAPPLET_Release((IApplet*)pApp);
               *ppObj = NULL;
		       return EFAILED;
		  }
		 // Add your code here .....

         return (AEE_SUCCESS);
      }
   }
	return (EFAILED);
}

/*===========================================================================

FUNCTION downloadbmp_HandleEvent

DESCRIPTION
	This is the EventHandler for this app. All events to this app are handled in this
	function. All APPs must supply an Event Handler.

PROTOTYPE:
	boolean downloadbmp_HandleEvent(IApplet * pi, AEEEvent eCode, uint16 wParam, uint32 dwParam)

PARAMETERS:
	pi: Pointer to the AEEApplet structure. This structure contains information specific
	to this applet. It was initialized during the AEEClsCreateInstance() function.

	ecode: Specifies the Event sent to this applet

   wParam, dwParam: Event specific data.

DEPENDENCIES
  none

RETURN VALUE
  TRUE: If the app has processed the event
  FALSE: If the app did not process the event

SIDE EFFECTS
  none
===========================================================================*/
static boolean downloadbmp_HandleEvent(CDBApp * pApp, AEEEvent eCode, uint16 wParam, uint32 dwParam)
{  
   if (pApp->m_pIStatic && ISTATIC_HandleEvent(pApp->m_pIStatic, eCode, wParam, dwParam))
      return TRUE;
   if (IHTMLVIEWER_HandleEvent(pApp->m_pHTMLViewer, eCode, wParam, dwParam))
      return TRUE;
   switch (eCode) 
	{
      case EVT_APP_START:    
		  DB_GoTo(pApp,JUMP_MAIN);
		    
		    // Add your code here .....

      		return(TRUE);
      case EVT_APP_STOP:

		    // Add your code here .....

         return TRUE;
      default:
         break;
   }
   return FALSE;
}
//HTMLVIER 回调函数
static void DB_NotifyCB( void* pvUser, HViewNotify* pNotify )
{
   CDBApp* pApp = (CDBApp*) pvUser;

   switch( pNotify->code )
   {

   case HVN_REDRAW_SCREEN:
      IDISPLAY_ClearScreen(pApp->a.m_pIDisplay);
      IHTMLVIEWER_Redraw(pApp->m_pHTMLViewer);
      break;

   case HVN_JUMP:
	   //网页中确定、提交按牛被按下
   case HVN_SUBMIT:
	   pApp->m_nTotleTimes=0;
	   ND_StartTest(pApp,pNotify->u.jump.pszURL);
      break;

   case HVN_DONE:
      IHTMLVIEWER_SetRect(pApp->m_pHTMLViewer, &pApp->m_nScreenRect);
      IHTMLVIEWER_Redraw( pApp->m_pHTMLViewer );
      break;

   }
}
//
static void DB_GoTo(CDBApp *pApp, const char *pszURL)
{
   int pos = pApp->m_cntHistory;    // pos = number of hist entries = next history entry

   if (pszURL == NULL) {
      // go back
      if (pos < 2)
         return;
      --pos;
      pszURL = pApp->m_ppszHistory[pos-1];   // use 'top' entry
   } else {
      // add new entry to history
      if (pos >= MAX_HIST)
         return;
      ++pos;
      StrReplace(&pApp->m_ppszHistory[pos-1], pszURL);
   }

   // Cleanup previous state

   if (pApp->m_pfnViewCleanup) {
      pApp->m_pfnViewCleanup = NULL;
   }

   // Activate appropriate state
   
   pApp->m_cntHistory = pos;

   if (STRBEGINS("test:", pszURL)) {
      // read form data and begin test
	   ND_StartTest(pApp, pszURL);
   } else /*if (STRBEGINS("file:", pszURL))*/ {
      // read and display file
      DB_DisplayMenu(pApp, pszURL);
   }
}
static void StrReplace(char **ppsz, const char *pszNew)
{
   FREE(*ppsz);   // FREE(NULL) is okay in BREW
   *ppsz = (pszNew ? STRDUP(pszNew) : (char*)pszNew);
}
static void DB_DisplayMenu(CDBApp* pApp, const char *pszURL)
{
   IFile *pf;
   const char *pszFileName = pszURL;

   if (STRBEGINS("file:", pszFileName))
      pszFileName += STRLEN("file:");

   if (STRBEGINS("///", pszFileName))
      pszFileName += STRLEN("///");

   pf = IFILEMGR_OpenFile(pApp->m_pFileMgr, pszFileName, _OFM_READ);

   if (pf) {

      // Set the file from which the viewer will get its text
      IHTMLVIEWER_LoadStream( pApp->m_pHTMLViewer, (IAStream*)pf);

      // Release our reference to the file.  (The HTML viewer is responsible for
      // its own reference count while it uses the stream.)
      IFILE_Release(pf);

   } else {
      
      // Set the file from which the viewer will get its text
      IHTMLVIEWER_SetData( pApp->m_pHTMLViewer, "<h1>Error</h1>File Not Found", -1);

   }
}

static boolean  DB_InitAppData(CDBApp * pApp)
{
	AEEDeviceInfo *pDeviceinfo;//定义设备信息变量
	AEEImageInfo  *pImage;
	 if(!DB_CreateMainControls(pApp))
	 {
		  return EFAILED;
	 }
    pDeviceinfo=MALLOC(sizeof(AEEDeviceInfo));
	//加载标题图象
	pApp->m_nTotleTimes=0;
	/*if((pApp->m_pTitleBarImg = ISHELL_LoadResImage(pApp->a.m_pIShell, CMYCITY_RES_FILE, IDB_TITLEBAR)) == NULL)
      return FALSE;
	pImage=MALLOC(sizeof(AEEImageInfo));
	IIMAGE_GetInfo(pApp->m_pTitleBarImg,pImage);*/
	pApp->m_nFontHeight=IDISPLAY_GetFontMetrics( pApp->a.m_pIDisplay, AEE_FONT_NORMAL, NULL, NULL ) + 1;
	pApp->m_pProgressImages[PROG_PHONE] = NULL;
	pApp->m_pProgressImages[PROG_FILE] = NULL;
	pApp->m_pProgressImages[PROG_ANIM] = NULL;
	//初始化动画，装载图象
	if ((pApp->m_pProgressImages[PROG_PHONE] = ISHELL_LoadResImage(pApp->a.m_pIShell, DOWNLOADBMP_RES_FILE, IDB_PHONE))==NULL ||
		(pApp->m_pProgressImages[PROG_FILE]  = ISHELL_LoadResImage(pApp->a.m_pIShell, DOWNLOADBMP_RES_FILE, IDB_FILE))==NULL ||
		(pApp->m_pProgressImages[PROG_ANIM]  = ISHELL_LoadResImage(pApp->a.m_pIShell, DOWNLOADBMP_RES_FILE, IDB_ANIM))==NULL)
	{
		return FALSE;
	}
	//设置动画显示的参数

	IIMAGE_SetParm(pApp->m_pProgressImages[PROG_ANIM], IPARM_NFRAMES,   4, 0);
	IIMAGE_SetParm(pApp->m_pProgressImages[PROG_ANIM], IPARM_CXFRAME,  15, 0);  	
	IIMAGE_SetParm(pApp->m_pProgressImages[PROG_ANIM], IPARM_RATE,    300, 0);
	ISHELL_GetDeviceInfo(pApp->a.m_pIShell,pDeviceinfo);
	ISHELL_RegisterHandler(pApp->a.m_pIShell,HTYPE_VIEWER,NULL,NULL);
    SETAEERECT( &pApp->m_nScreenRect, 0, 0/*pImage->cy*/, pDeviceinfo->cxScreen, pDeviceinfo->cyScreen/* - pImage->cy*/ );
	// 初始化IWeb借口
	{
      int    i = 0;
      WebOpt awo[10]; 

      // set the IWeb connect timeout to 10 seconds.  this also sets the 
      // failover timeout, if unset, or set to 0, IWeb uses the system 
      // default (30 seconds unless an OEM changes it)
      awo[i].nId  = WEBOPT_CONNECTTIMEOUT;
      awo[i].pVal = (void *)100000;
      i++;

      // test user-agent, uncomment this section to ship your own user-agent 
      // string. if unset, IWeb will send a default.  If set to NULL, no 
      // user agent header will be sent */

      // Set TEST_USER_AGENT in the NetDiagnostics project settings to all
      // shipping of your own user agent.

#ifdef TEST_USER_AGENT
      awo[i].nId  = WEBOPT_USERAGENT;
      awo[i].pVal = (void *)WEBBER_USERAGENT;
      i++;