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Menu update from Bill - dynamic allocation of items... 

git-svn-id: file:///fltk/svn/fltk/trunk@116 ea41ed52-d2ee-0310-a9c1-e6b18d33e121
This commit is contained in:
Michael R Sweet 1998-12-02 16:15:12 +00:00
parent 892664ca26
commit aadcb29e90
1 changed files with 44 additions and 15 deletions
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59
src/Fl_Menu_add.cxx
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@ -1,5 +1,5 @@
//
// "$Id: Fl_Menu_add.cxx,v 1.3 1998/10/21 14:20:13 mike Exp $"
// "$Id: Fl_Menu_add.cxx,v 1.4 1998/12/02 16:15:12 mike Exp $"
//
// Menu utilities for the Fast Light Tool Kit (FLTK).
//
@ -47,6 +47,23 @@ int fl_old_shortcut(const char* s) {
return n | *s;
}
// always allocate this much initially:
#define INITIAL_MENU_SIZE 15
// as menu array size passes through each power of two, the memory
// array allocated is doubled in size:
static Fl_Menu_Item* incr_array(Fl_Menu_Item* array, int size) {
if (size < INITIAL_MENU_SIZE) return array;
if ((size+1) & size) return array; // not a power of 2
Fl_Menu_Item* newarray = new Fl_Menu_Item[size*2+1];
for (int i = 0; i <= size; i++) newarray[i] = array[i];
delete[] array;
return newarray;
}
// if this local pointer is set, array is reallocated and put here:
static Fl_Menu_Item** alloc;
int Fl_Menu_Item::add(
const char *text,
int shortcut,
@ -54,17 +71,15 @@ int Fl_Menu_Item::add(
void *data,
int flags)
{
Fl_Menu_Item *m;
Fl_Menu_Item *array = this;
Fl_Menu_Item *m = this;
const char *p;
char *q;
char buf[1024];
int size = this->size();
int size = array->size();
int flags1 = 0;
char* item;
m = this;
for (;;) { /* do all the supermenus: */
/* fill in the buf with name, changing \x to x: */
@ -82,7 +97,14 @@ int Fl_Menu_Item::add(
if (m->flags&FL_SUBMENU && !strcmp(item,m->text)) break;
if (!m->text) { /* create a new menu */
memmove(m+2,m,sizeof(Fl_Menu_Item)*(this+size-m));
if (alloc) {
int n = m-array;
array = incr_array(array,size);
array = incr_array(array,size+1);
*alloc = array;
m = array+n;
}
memmove(m+2,m,sizeof(Fl_Menu_Item)*(array+size-m));
m->text = strdup(item);
m->shortcut_ = 0;
m->callback_ = 0;
@ -101,7 +123,12 @@ int Fl_Menu_Item::add(
if (!strcmp(m->text,item)) break;
if (!m->text) { /* add a new menu item */
memmove(m+1,m,sizeof(Fl_Menu_Item)*(this+size-m));
if (alloc) {
int n = m-array;
*alloc = array = incr_array(array,size);
m = array+n;
}
memmove(m+1,m,sizeof(Fl_Menu_Item)*(array+size-m));
size++;
m->text = strdup(item);
}
@ -113,19 +140,21 @@ int Fl_Menu_Item::add(
m->flags = flags|flags1;
m->labeltype_ = m->labelfont_ = m->labelsize_ = m->labelcolor_ = 0;
return m-this;
return m-array;
}
// this is really lame, it will crash if this many items are added:
#define FL_MENU_MAXITEMS 128
int Fl_Menu_::add(const char *t, int s, Fl_Callback *c,void *v,int f) {
int n = value_ ? value_ - menu_ : 0;
if (!menu_) {
value_ = menu_ = new Fl_Menu_Item[FL_MENU_MAXITEMS+1];
alloc = 1;
menu_ = new Fl_Menu_Item[INITIAL_MENU_SIZE];
menu_[0].text = 0;
}
return menu_->add(t,s,c,v,f);
if (alloc) ::alloc = &menu_;
int r = menu_->add(t,s,c,v,f);
::alloc = 0;
if (value_) value_ = menu_+n;
return r;
}
int Fl_Menu_::add(const char *str) {
@ -172,5 +201,5 @@ void Fl_Menu_::clear() {
}
//
// End of "$Id: Fl_Menu_add.cxx,v 1.3 1998/10/21 14:20:13 mike Exp $".
// End of "$Id: Fl_Menu_add.cxx,v 1.4 1998/12/02 16:15:12 mike Exp $".
//