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//
// "$Id: Fl_Menu_.cxx,v 1.7.2.8.2.9 2004/04/11 04:38:57 easysw Exp $"
//
// Common menu code for the Fast Light Tool Kit (FLTK).
//
// Copyright 1998-2004 by Bill Spitzak and others.
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Library General Public
// License as published by the Free Software Foundation; either
// version 2 of the License, or (at your option) any later version.
//
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
// Library General Public License for more details.
//
// You should have received a copy of the GNU Library General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
// USA.
//
// Please report all bugs and problems to "fltk-bugs@fltk.org".
//
// This is a base class for all items that have a menu:
// Fl_Menu_Bar, Fl_Menu_Button, Fl_Choice
// This provides storage for a menu item, functions to add/modify/delete
// items, and a call for when the user picks a menu item.
// More code in Fl_Menu_add.cxx
#include <FL/Fl.H>
#include <FL/Fl_Menu_.H>
#include "flstring.h"
#include <stdio.h>
#include <stdlib.h>
// Set 'pathname' of specified menuitem
// If finditem==NULL, mvalue() is used (the most recently picked menuitem)
// Returns:
// 0 : OK
// -1 : item not found (name="")
// -2 : 'name' not large enough (name="")
//
#define SAFE_STRCAT(s) \
{ len += strlen(s); if ( len >= namelen ) { *name='\0'; return(-2); } else strcat(name,(s)); }
int Fl_Menu_::item_pathname(char *name, int namelen, const Fl_Menu_Item *finditem) const {
int len = 0;
finditem = finditem ? finditem : mvalue();
name[0] = '\0';
for ( int t=0; t<size(); t++ ) {
const Fl_Menu_Item *m = &(menu()[t]);
if ( m->submenu() ) { // submenu? descend
if ( *name ) SAFE_STRCAT("/");
SAFE_STRCAT(m->label());
} else {
if ( m->label() ) { // menu item?
if ( m == finditem ) { // found? tack on itemname, done.
SAFE_STRCAT("/");
SAFE_STRCAT(m->label());
return(0);
}
} else { // end of submenu? pop
char *ss = strrchr(name, '/');
if ( ss ) { *ss = 0; len = strlen(name); } // "File/Edit" -> "File"
else { name[0] = '\0'; len = 0; } // "File" -> ""
continue;
}
}
}
*name = '\0';
return(-1); // item not found
}
// FIND MENU ITEM INDEX, GIVEN MENU PATHNAME
// eg. "Edit/Copy"
// Will also return submenus, eg. "Edit"
// Returns NULL if not found.
//
const Fl_Menu_Item *
Fl_Menu_::find_item(const char *name)
{
char menupath[1024] = ""; // File/Export
for ( int t=0; t < size(); t++ ) {
Fl_Menu_Item *m = menu_ + t;
if (m->submenu()) {
// IT'S A SUBMENU
if (menupath[0]) strlcat(menupath, "/", sizeof(menupath));
strlcat(menupath, m->label(), sizeof(menupath));
if (!strcmp(menupath, name)) return m;
} else {
if (!m->label()) {
// END OF SUBMENU? Pop back one level.
char *ss = strrchr(menupath, '/');
if ( ss ) *ss = 0;
continue;
}
// IT'S A MENU ITEM
char itempath[1024]; // eg. Edit/Copy
strcpy(itempath, menupath);
if (itempath[0]) strlcat(itempath, "/", sizeof(itempath));
strlcat(itempath, m->label(), sizeof(itempath));
if (!strcmp(itempath, name)) return m;
}
}
return (const Fl_Menu_Item *)0;
}
int Fl_Menu_::value(const Fl_Menu_Item* m) {
clear_changed();
if (value_ != m) {value_ = m; return 1;}
return 0;
}
// When user picks a menu item, call this. It will do the callback.
// Unfortunatly this also casts away const for the checkboxes, but this
// was necessary so non-checkbox menus can really be declared const...
const Fl_Menu_Item* Fl_Menu_::picked(const Fl_Menu_Item* v) {
if (v) {
if (v->radio()) {
if (!v->value()) { // they are turning on a radio item
set_changed();
((Fl_Menu_Item*)v)->setonly();
}
redraw();
} else if (v->flags & FL_MENU_TOGGLE) {
set_changed();
((Fl_Menu_Item*)v)->flags ^= FL_MENU_VALUE;
redraw();
} else if (v != value_) { // normal item
set_changed();
}
value_ = v;
if (when()&(FL_WHEN_CHANGED|FL_WHEN_RELEASE)) {
if (changed() || when()&FL_WHEN_NOT_CHANGED) {
clear_changed();
if (value_ && value_->callback_) value_->do_callback((Fl_Widget*)this);
else do_callback();
}
}
}
return v;
}
// turn on one of a set of radio buttons
void Fl_Menu_Item::setonly() {
flags |= FL_MENU_RADIO | FL_MENU_VALUE;
Fl_Menu_Item* j;
for (j = this; ; ) { // go down
if (j->flags & FL_MENU_DIVIDER) break; // stop on divider lines
j++;
if (!j->text || !j->radio()) break; // stop after group
j->clear();
}
for (j = this-1; ; j--) { // go up
if (!j->text || (j->flags&FL_MENU_DIVIDER) || !j->radio()) break;
j->clear();
}
}
Fl_Menu_::Fl_Menu_(int X,int Y,int W,int H,const char* l)
: Fl_Widget(X,Y,W,H,l) {
set_flag(SHORTCUT_LABEL);
box(FL_UP_BOX);
when(FL_WHEN_RELEASE_ALWAYS);
value_ = menu_ = 0;
alloc = 0;
selection_color(FL_SELECTION_COLOR);
textfont(FL_HELVETICA);
textsize((uchar)FL_NORMAL_SIZE);
textcolor(FL_BLACK);
down_box(FL_NO_BOX);
}
int Fl_Menu_::size() const {
if (!menu_) return 0;
return menu_->size();
}
void Fl_Menu_::menu(const Fl_Menu_Item* m) {
clear();
value_ = menu_ = (Fl_Menu_Item*)m;
}
// this version is ok with new Fl_Menu_add code with fl_menu_array_owner:
void Fl_Menu_::copy(const Fl_Menu_Item* m, void* ud) {
int n = m->size();
Fl_Menu_Item* newMenu = new Fl_Menu_Item[n];
memcpy(newMenu, m, n*sizeof(Fl_Menu_Item));
menu(newMenu);
alloc = 1; // make destructor free array, but not strings
// for convienence, provide way to change all the user data pointers:
if (ud) for (; n--;) {
if (newMenu->callback_) newMenu->user_data_ = ud;
newMenu++;
}
}
Fl_Menu_::~Fl_Menu_() {
clear();
}
// Fl_Menu::add() uses this to indicate the owner of the dynamically-
// expanding array. We must not free this array:
Fl_Menu_* fl_menu_array_owner = 0;
void Fl_Menu_::clear() {
if (alloc) {
if (alloc>1) for (int i = size(); i--;)
if (menu_[i].text) free((void*)menu_[i].text);
if (this == fl_menu_array_owner)
fl_menu_array_owner = 0;
else
delete[] menu_;
menu_ = 0;
value_ = 0;
alloc = 0;
}
}
//
// End of "$Id: Fl_Menu_.cxx,v 1.7.2.8.2.9 2004/04/11 04:38:57 easysw Exp $".
//
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