_OnSelection( ) API Library Routine Example
The following example creates a menu with three items. It calls _OnSelection( ) with an ITEMID parameter of –1, indicating that the function USERCHOICE( ) is to be called when the user chooses any item from this menu.
SET LIBRARY TO ONSELECT
#include <pro_ext.h>
void putLong(long n)
{
Value val;
val.ev_type = 'I';
val.ev_long = n;
val.ev_width = 10;
_PutValue(&val);
}
FAR onSelection(long menuId, long itemId)
{
_PutStr("\nitemId = "); putLong(itemId);
_DisposeMenu(menuId);
}
FAR activateMenu(ParamBlk FAR *parm)
{
MENUID menuId;
ITEMID itemId;
Point loc;
menuId = _GetNewMenuId();
_NewMenu(MPOPUP, menuId);
itemId = _GetNewItemId(menuId);
_NewItem(menuId, itemId, -2, "\\<1st item");
itemId = _GetNewItemId(menuId);
_NewItem(menuId, itemId, -2, "\\<2nd item");
itemId = _GetNewItemId(menuId);
_NewItem(menuId, itemId, -2, "\\<3rd item");
loc.v = 10; loc.h = 20;
_SetMenuPoint(menuId, loc);
_ActivateMenu(menuId);
_OnSelection(menuId, -1, onSelection);
}
FoxInfo myFoxInfo[] = {
{"ONLOAD", (FPFI) activateMenu, CALLONLOAD, ""},
};
FoxTable _FoxTable = {
(FoxTable FAR *) 0, sizeof(myFoxInfo)/sizeof(FoxInfo), myFoxInfo
};