//	WindowMenu.c
//
//	This file defines a "Window" menu

#include "WindowMenu.h"

// global variables
MenuHandle wmMenuHdl = 0;

// build a menu from the Windows folder,
// and initialize the OSA component needed to execute Windows
void BuildWindowMenu( const short menuID )
{
	// delete previous menu, if any
	if (wmMenuHdl) {
		DisposeMenu(wmMenuHdl);
	}
	
	// create a new menu
	wmMenuHdl = NewMenu( menuID, "\pWindows" );
	
	// build the list of Windows
	UpdateWindowMenu();
	
	// insert into the menu bar
	InsertMenu( wmMenuHdl, 0 );
}

// add the windows, as needed, to the window menu
void UpdateWindowMenu()
{
	short i;
	WindowPeek windptr;
	Str255 str;
	
	// delete previous items
	short cnt = CountMItems( wmMenuHdl );
	for (i=1; i<=cnt; i++) {
		DelMenuItem( wmMenuHdl, 1 );
	}

	// add new items
	for (windptr = (WindowPeek)FrontWindow(); windptr; windptr = windptr->nextWindow ) {
		GetWTitle( (WindowPtr)windptr, str );
		AppendMenu( wmMenuHdl, str );	
	}
}

// enable the Windows menu
void EnableWindowMenu()
{
	// we'd like to just say this:
	//		EnableItem( wmMenuHdl, 0 );
	// ...but some apps (like MacZoop) muck with the enable flags,
	// and then this doesn't work.  So we'll do it the hard way:
	short i;
	short cnt = CountMItems( wmMenuHdl );
	for (i=0; i<=cnt; i++) {
		EnableItem( wmMenuHdl, i );
	}
}

// disable the Windows menu
void DisableWindowMenu()
{
	DisableItem( wmMenuHdl, 0 );
}

// handle a menu selection
void HandleWindowMenuSelection( const short num )
{
	// if the window menu is freshly built in layer order,
	// then we can just find and select the "num"th window
	short i;
	WindowPeek windptr = (WindowPeek)FrontWindow();
	for (i=1; i<num; i++) {
		windptr = (windptr ? windptr->nextWindow : 0);
	}
	
	// now we should have a pointer to the proper window
	if (windptr)
		SelectWindow( (WindowPtr)windptr );
}