I have seen this question popup (ha!) a lot recently. I wrote this nice
handy dandy popup list fcn to handle all my popup list needs. It requires
the list ID, the trigger ID and a string list resource ID to function
properly.
I call it from my event loop when the trigger is selected (ctlSelect). It
could be argued that I am doing work the OS does for free but I like the
control I have here. I then do what I need with the return value (be aware
-1 is returned on "nothing selected").
I then return true from my event handler when this is finished so the OS
knows I have done all I need and shortcut the trigger event etc.
ttfn.
E/.
/*********
* PopupListHandler
*
* Change the label of the selected popup control to that selected in the
* list. It also returns the index of the item selected
*/
Int16 PopupListHandler( UInt32 inListID, UInt32 inControlID, UInt32
inStrListID )
{
VoidHand strHandle = DmGetResource( strListRscType, inStrListID );
VoidHand strArrayH = NULL;
Int16 indx = -1;
if ( strHandle != NULL )
{
StrListPtr strListPtr = (StrListPtr)MemHandleLock( strHandle
);
strArrayH = SysFormPointerArrayToStrings(
strListPtr->firstString, strListPtr->numStrings );
ListPtr lst = (ListPtr)GetObjectPtr( inListID );
ControlType* popTrigger = (ControlType*)GetObjectPtr(
inControlID );
LstSetListChoices( lst, (char**)MemHandleLock( strArrayH ),
(int)(strListPtr->numStrings) );
indx = LstPopupList( lst );
// indx will be -1 if user did not select something in the
list
if ( indx >= 0 )
{
char *selText = LstGetSelectionText( lst, indx );
CtlSetLabel( popTrigger, selText );
}
MemHandleUnlock( strArrayH );
MemHandleUnlock( strHandle );
MemHandleFree( strArrayH );
DmReleaseResource( strHandle );
}
return indx;
}
// used by any fcns that wish to use string lists
typedef struct StrListType
{
char prefixString; // assumed empty
char numStringsHiByte; // assumed 0
char numStrings; // low byte of count allows 255
char firstString[1];
} *StrListPtr;
________________________________________________________
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Evan Wise
Sprite Herder
infowave
E: [EMAIL PROTECTED]
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