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menustack.c
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C/C++ Source or Header
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1995-03-17
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7KB
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231 lines
/*
* Simple menu package. Needs lotsa work to handle some cases.
*
* Copyright 1985
* Louis A. Mamakos
* Software & Stuff
* 14813 Ashford Place
* Laurel, MD 20707
*
* For non-commerical use only. This program, or any modifications, may not
* be sold or incorporated into any product without prior permission from the
* author.
*
* Modified by mwm to handle "stacking" menus.
* NB - adding item to a menu that's been "popped" back to doesn't work,
* and probably never will.
* I took at the subitem code at the same time - mwm
*/
/* Change if your terminal isn't * x 400 */
#define SCREENHEIGHT 200
#include <exec/types.h>
#include <exec/nodes.h>
#include <exec/lists.h>
#include <exec/ports.h>
#include <exec/devices.h>
#include <exec/memory.h>
#include <hardware/blit.h>
#include <graphics/copper.h>
#include <graphics/regions.h>
#include <graphics/rastport.h>
#include <graphics/gfxbase.h>
#include <graphics/gels.h>
#include <intuition/intuition.h>
#define MNUM(menu,item,sub) (SHIFTMENU(menu)|SHIFTITEM(item)|SHIFTSUB(sub))
struct Mem_Node {
struct Node mn_Node;
struct Remember mn_Memory;
struct Menu *mn_Menu;
} *Top, *RemHead();
static struct List Memory;
static int Cur_Menu, Cur_MenuItem, Cur_SubItem;
static struct Menu *LastMenu;
static struct MenuItem *LastMenuItem;
struct Menu *AutoMenu; /* menu struct being dynamically built */
char *strsave(); /* Save a string in the remember list */
Menu_Init()
{
Memory.lh_Head = (struct Node *) &(Memory.lh_Tail);
Memory.lh_TailPred = (struct Node *) &(Memory.lh_Head);
Memory.lh_Tail = NULL;
Memory.lh_Type = NT_MEMORY;
Top = NULL;
Cur_Menu = Cur_MenuItem = -1;
AutoMenu = LastMenu = NULL; /* no menu chain yet */
LastMenuItem = NULL;
}
Menu_Clear()
{
while ((Top = RemHead(&Memory)) != NULL) {
FreeRemember(&(Top->mn_Memory), TRUE);
FreeMem(Top, sizeof(struct Mem_Node));
}
Menu_Init(); /* Just for safeties sake */
}
Menu_Pop()
{
if ((Top = RemHead(&Memory)) == NULL) return NULL;
FreeRemember(&(Top->mn_Memory), TRUE);
FreeMem(Top, sizeof(struct Mem_Node));
/* Now, set Top back to the real list head */
Top = (struct Mem_Node *) Memory.lh_Head;
LastMenu = Top->mn_Menu;
LastMenuItem = NULL; /* Wrong, but you can't add items here anyway */
Cur_Menu--;
}
/*
* Add a MENU item. Args are the text of the menu item, and an enable
* flag. Returns an Intuition type menu number, with the MenuItem and
* Menu SubItem being NOITEM and NOSUB. The MENUITEM part is valid.
*/
Menu_Add(name, enabled)
char *name;
int enabled;
{
register struct Menu *m;
if ((Top = (struct Mem_Node *) AllocMem(
sizeof(struct Mem_Node), MEMF_PUBLIC | MEMF_CLEAR)) == NULL)
return NULL;
Top->mn_Node.ln_Type = NT_MEMORY;
if ((m = (struct Menu *)AllocRemember(&(Top->mn_Memory),
sizeof (struct Menu), MEMF_PUBLIC | MEMF_CLEAR)) == NULL)
return NULL;
Top->mn_Menu = m;
if (LastMenu == NULL)
AutoMenu = m; /* first menu on list */
else
LastMenu->NextMenu = m; /* link it in */
LastMenuItem = NULL; /* end of previous MenuItem list */
Cur_MenuItem = -1; /* reset item numbers */
if (LastMenu == NULL)
m->LeftEdge = 0;
else
m->LeftEdge = LastMenu->LeftEdge + LastMenu->Width;
m->TopEdge = 0;
m->Width = strlen(name) * 8;
Top->mn_Node.ln_Name = m->MenuName = strsave(name);
m->Height = 0;
m->Flags = enabled ? MENUENABLED : 0;
m->FirstItem = NULL;
LastMenu = m;
AddHead(&Memory, Top);
return MNUM(++Cur_Menu, NOITEM, NOSUB);
}
/*
* Add a menu item to the current MENU. Note that Add_Menu *must* be
* called before this function.
*/
Menu_Item_Add(name, flags, mux, ch)
char *name; /* name of menu item */
USHORT flags;
LONG mux; /* mutual exclusion mask */
BYTE ch; /* command sequence character, if COMMSEQ */
{
register struct MenuItem *m, *n;
register struct IntuiText *it;
flags &= CHECKIT|CHECKED|COMMSEQ|MENUTOGGLE|ITEMENABLED|HIGHCOMP|HIGHBOX;
if (LastMenu == NULL)
return MNUM(NOMENU, NOITEM, NOSUB);
if ((m = (struct MenuItem *) AllocRemember(&(Top->mn_Memory),
sizeof(struct MenuItem), MEMF_PUBLIC | MEMF_CLEAR)) == NULL)
return MNUM(NOMENU, NOITEM, NOSUB);
if (LastMenuItem == NULL)
LastMenu->FirstItem = m;
else
LastMenuItem->NextItem = m;
m->Flags = flags | ITEMTEXT;
/*
* Check for highlight mode: if none selected, use HIGHCOMP
*/
if ((m->Flags & (HIGHCOMP | HIGHBOX)) == 0)
m->Flags |= HIGHCOMP;
m->Command = ch;
m->MutualExclude = mux;
m->SubItem = NULL;
m->ItemFill = (APTR) AllocRemember(&(Top->mn_Memory),
sizeof(struct IntuiText), MEMF_PUBLIC | MEMF_CLEAR);
it = (struct IntuiText *) m->ItemFill;
it->FrontPen = AUTOFRONTPEN;
it->BackPen = AUTOBACKPEN;
it->DrawMode = JAM2;
if (flags & CHECKIT)
it->LeftEdge = CHECKWIDTH + 1;
else
it->LeftEdge = 1;
it->TopEdge = 1;
it->ITextFont = NULL; /* default font */
it->IText = strsave(name);
it->NextText = NULL;
m->Width = 0;
if (LastMenuItem == NULL) {
m->TopEdge = 2;
m->LeftEdge = 0;
} else if (LastMenuItem->TopEdge + 40 > SCREENHEIGHT) {
m->TopEdge = 2;
m->LeftEdge = LastMenuItem->LeftEdge + LastMenuItem->Width + 12;
} else {
m->TopEdge = LastMenuItem->TopEdge + 12;
m->LeftEdge = LastMenuItem->LeftEdge;
}
if (flags & CHECKIT)
m->Width += CHECKWIDTH;
if (flags & COMMSEQ)
m->Width += COMMWIDTH + 20;
m->Width += IntuiTextLength(m->ItemFill);
m->Height = 10;
/*
* Check last menu item's width to see if it is larger than this
* item's. If new item is larger, then update width of all other
* items.
*/
if (LastMenuItem) {
if (LastMenuItem->Width > m->Width)
m->Width = LastMenuItem->Width;
else {
register short delta = m->Width - LastMenuItem->Width;
for (n = LastMenu->FirstItem; n != m; n = n->NextItem) {
n->Width = m->Width;
if (n->LeftEdge > 0) n->LeftEdge += delta;
}
if (m->LeftEdge > 0) m->LeftEdge += delta;
}
}
LastMenuItem = m;
return MNUM(Cur_Menu, ++Cur_MenuItem, NOSUB);
}
char *
strsave(string) char *string; {
char *out ;
out = (char *) AllocRemember(&(Top->mn_Memory), strlen(string) + 1,
MEMF_PUBLIC) ;
if (out == NULL) return NULL ;
(void) strcpy(out, string) ;
return out ;
}