SourceCodeSky

/* 
   File: frame.cpp - Implementation of main frame window.

   Implements ZDDesk's main frame window.  This window is never visible it is
   mainly provided to handle tray notification messages and to display the
   context menu and to process menu commands.  It implements the "virtual 
   desk" code for ZDDesk -- i.e. the switching of desktops, etc..

   Author: Steven E. Sipe
   
*/

#include "stdafx.h"
#include "zddesk.h"

#include "frame.h"
#include "splash.h"

#include "tray.h"
#include "registry.h"
#include "arrange.h"
#include "property.h"

#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif

static const char *ZDDESKKEY = "Software\\PC Magazine\\ZDDesk";
static const int UM_TRAYNOTIFY = WM_USER+2000;

/////////////////////////////////////////////////////////////////////////////
// CZDDeskFrame

BEGIN_MESSAGE_MAP(CZDDeskFrame, CFrameWnd)
   //{{AFX_MSG_MAP(CZDDeskFrame)
   ON_WM_CREATE()
   ON_WM_DESTROY()
   ON_WM_RBUTTONUP()
   ON_COMMAND(IDM_EXIT, OnExit)
   ON_WM_LBUTTONUP()
   ON_COMMAND(IDM_ARRANGE, OnArrange)
   ON_COMMAND(IDM_PROPERTIES, OnProperties)
   ON_COMMAND(IDM_ABOUT, OnAbout)
   ON_COMMAND(IDM_HELP, OnHelp)
   //}}AFX_MSG_MAP
   ON_MESSAGE(UM_TRAYNOTIFY,OnTrayNotify)
   ON_COMMAND_RANGE(IDM_DESK1,IDM_DESK9,OnSelectDesk)
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CZDDeskFrame construction/destruction

// Constructor
CZDDeskFrame::CZDDeskFrame()
{
   // Initialize the virtual desktop
   InitializeDesks();
}

// Destructor
CZDDeskFrame::~CZDDeskFrame()
{
   // Shutdown the virutual desktop
   UninitializeDesks();
}

///////////////////////////////
/// "Safe" utility routines ///
///////////////////////////////

// Performs a ShowWindow() call without locking up on frozen applications.
// Basically, the WM_SHOWWINDOW message generated for each app by ShowWindow() 
// locks the sending app under Windows if the receiving app is dead
BOOL CZDDeskFrame::SafeShowWindow(HWND hWnd, int nShowCmd)
{
   // Determine if the app is still alive or hung
   DWORD dwResult;
   if(::SendMessageTimeout(hWnd,WM_NULL,0,0,SMTO_ABORTIFHUNG,1000,&dwResult))
   {
      // Seemed to work okay --- show the window
      if(dwResult == 0)
         ::ShowWindow(hWnd,nShowCmd);
      return(TRUE);
   }
   else 
   {
      // Skating on thin ice now, don't send anymore color changes
      if(!m_bFrozen)
      {
         // Warn the user about the potential problem
         m_bFrozen = TRUE;
         AfxMessageBox(IDS_FROZEN,MB_ICONWARNING|MB_OK);
      }
      return(FALSE);
   }
}

// Don't set the system colors if we have detected a dead application --
// the WM_SYSCOLORCHANGE message also locks up with dead applications
void CZDDeskFrame::SafeSetSysColors(int cElements, CONST INT *lpaElements,
                              CONST COLORREF *lpaRgbValues)[!==More==!]