164 lines
7.9 KiB
HTML
164 lines
7.9 KiB
HTML
<HTML><BODY>
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<HR break>
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<H2><A name=Fl_Menu_>class Fl_Menu_</A></H2>
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<HR>
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<H3>Class Hierarchy</H3>
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<UL>
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<PRE>
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<A href=Fl_Widget.html#Fl_Widget>Fl_Widget</A>
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+----<B>Fl_Menu_</B>----<A href=Fl_Menu_Item.html#Fl_Menu_Item>Fl_Menu_Item</A>
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+----<A href=functions.html#Fl_Choice>Fl_Choice</A>, <A href=Fl_Menu_Bar.html#Fl_Menu_Bar>Fl_Menu_Bar</A>, <A href=Fl_Menu_Button.html#Fl_Menu_Button>Fl_Menu_Button</A>
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</PRE>
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</UL>
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<H3>Include Files</H3>
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<UL>
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<PRE>
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#include <FL/Fl_Menu_.H>
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</PRE>
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</UL>
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<H3>Description</H3>
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All widgets that have a menu in FLTK are subclassed off of this class.
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Currently FLTK provides you with <A href=Fl_Menu_Button.html#Fl_Menu_Button>
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<TT>Fl_Menu_Button</TT></A>, <A href=Fl_Menu_Bar.html#Fl_Menu_Bar><TT>
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Fl_Menu_Bar</TT></A>, and <A href=functions.html#Fl_Choice><TT>Fl_Choice</TT>
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</A>.
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<P>The class contains a pointer to an array of structures of type <A href=Fl_Menu_Item.html#Fl_Menu_Item>
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<TT>Fl_Menu_Item</TT></A>. These describe the contents of the menu.
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Usually the array is a large initialization constant, but there are
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methods to build it dynamically. </P>
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<H3>Methods</H3>
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<CENTER>
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<TABLE width=90%>
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<TR><TD align=left valign=top>
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<UL>
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<LI><A href=#Fl_Menu_.Fl_Menu_>Fl_Menu_</A></LI>
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<LI><A href=#Fl_Menu_.~Fl_Menu_>~Fl_Menu_</A></LI>
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<LI><A href=#Fl_Menu_.add>add</A></LI>
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<LI><A href=#Fl_Menu_.clear>clear</A></LI>
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</UL>
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</TD><TD align=left valign=top>
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<UL>
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<LI><A href=#Fl_Menu_.down_box>down_box</A></LI>
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<LI><A href=#Fl_Menu_.global>global</A></LI>
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<LI><A href=#Fl_Menu_.menu>menu</A></LI>
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<LI><A href=#Fl_Menu_.mode>mode</A></LI>
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</UL>
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</TD><TD align=left valign=top>
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<UL>
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<LI><A href=#Fl_Menu_.remove>remove</A></LI>
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<LI><A href=#Fl_Menu_.replace>replace</A></LI>
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<LI><A href=#Fl_Menu_.shortcut>shortcut</A></LI>
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<LI><A href=#Fl_Menu_.size>size</A></LI>
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</UL>
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</TD><TD align=left valign=top>
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<UL>
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<LI><A href=#Fl_Menu_.test_shortcut>test_shortcut</A></LI>
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<LI><A href=#Fl_Menu_.text>text</A></LI>
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<LI><A href=#Fl_Menu_.textcolor>textcolor</A></LI>
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</UL>
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</TD><TD align=left valign=top>
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<UL>
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<LI><A href=#Fl_Menu_.textfont>textfont</A></LI>
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<LI><A href=#Fl_Menu_.textsize>textsize</A></LI>
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<LI><A href=#Fl_Menu_.value>value</A></LI>
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</UL>
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</TD></TR>
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</TABLE>
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</CENTER>
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<H4><A name=Fl_Menu_.Fl_Menu_>Fl_Menu_::Fl_Menu_(int x, int y, int w,
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int h, const char *label = 0)</A></H4>
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Creates a new <TT>Fl_Menu_</TT> widget using the given position, size,
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and label string. The default boxtype is <TT>FL_NO_BOX</TT>.
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<H4><A name=Fl_Menu_.~Fl_Menu_>virtual Fl_Menu_::~Fl_Menu_()</A></H4>
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Destroys the menu and its items.
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<H4><A name=Fl_Menu_.menu>const Fl_Menu_Item* Fl_Menu_::menu() const
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<BR> void Fl_Menu_::menu(const Fl_Menu_Item*)</A></H4>
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Get or set the menu array directly. Setting it to <TT>NULL</TT>
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indicates that you want the widget to allocate its own array.
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<H4><A name=Fl_Menu_.value>int Fl_Menu_::value() const
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<BR> int Fl_Menu_::value(int)
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<BR> int Fl_Menu_::value(const Fl_Menu_Item*)</A></H4>
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The value is the index into <TT>menu()</TT> of the last item chosen by
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the user. It is zero initially. You can set it as an integer, or set
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it with a pointer to a menu item. The set routines return non-zero if
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the new value is different than the old one.
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<H4><A name=Fl_Menu_.test_shortcut>const Fl_Menu_Item*
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Fl_Menu_::test_shortcut()</A></H4>
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Only call this in response to <TT>FL_SHORTCUT events</TT>. If the
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event matches an entry in the menu that entry is selected and the
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callback will be done (or <TT>changed()</TT> will be set). This allows
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shortcuts directed at one window to call menus in another.
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<H4><A name=Fl_Menu_.global>void Fl_Menu_::global()</A></H4>
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Make the shortcuts for this menu work no matter what window has the
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focus when you type it. This is done by using <A href=osissues.html#add_handler>
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<TT>Fl::add_handler()</TT></A>. This <TT>Fl_Menu_</TT> widget does not
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have to be visible (ie the window it is in can be hidden, or it does
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not have to be put in a window at all).
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<P>Currently there can be only one <TT>global()</TT>menu. Setting a new
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one will replace the old one. There is no way to remove the <TT>
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global()</TT> setting (including destroying the menu). </TT></P>
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<H4><A name=Fl_Menu_.text>const char* Fl_Menu_::text() const
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<BR> const char* Fl_Menu_::text(int i) const</A></H4>
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Returns the title of the last item chosen, or of item <TT>i</TT>.
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<H4><A name=Fl_Menu_.size>int Fl_Menu_::size() const</A></H4>
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This returns <TT>menu()->size()</TT>, which is how many entries are in
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the array, not counting the <TT>NULL</TT> ending, but including all
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submenus titles and the <TT>NULL</TT>'s that end them. If the menu is <TT>
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NULL</TT> this returns zero.
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<H4><A name=Fl_Menu_.add>int Fl_Menu_::add(const char *,const char
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*,Fl_Callback *,void *v=0,int f=0)
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<BR> int Fl_Menu_::add(const char *)</A></H4>
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The first form adds a new menu item, with a <TT>title</TT> string, <TT>
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shortcut</TT> string, <TT>callback</TT>, argument to the callback, and
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flags. If <TT>menu()</TT> was originally set with <TT>NULL</TT> then
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space is allocated for the new item. If instead you gave it an array
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then the array must have enough empty space for the new item. The
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title string is copied, but the shortcut is not.
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<P>The second form splits the string at any | characters and then does <TT>
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add(s,0,0,0,0)</TT> with each section. This is often useful if you are
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just using the value, and is compatable with some Forms programs. </P>
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<P>Text is a string of the form "foo/bar/baz", this example will result
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in a submenu called "foo" and one in that called "bar" and and entry
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called "baz". The text is copied to new memory and can be freed. The
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other arguments are copied into the menu item unchanged. </P>
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<P>If an item exists already with that name then it is replaced with
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this new one. Otherwise this new one is added to the end of the
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correct menu or submenu. The return value is the offset into the array
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that the new entry was placed at. </P>
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<P>No bounds checking is done, the table must be big enough for all the
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entries you plan to add. Don't forget that there is a <TT>NULL</TT>
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terminator on the end, and the first time a item is added to a submenu
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three items are added (the title and the <TT>NULL</TT> terminator, as
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well as the actual menu item) </P>
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<P>The return value is the index into the array that the entry was put. </P>
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<H4><A name=Fl_Menu_.clear>void Fl_Menu_::clear()</A></H4>
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Delete all the menu items. Don't do this if you used <TT>menu(x)</TT>
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to set it to your own array. You should do this before destroying the <TT>
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Fl_Menu_</TT> widget if it uses it's own array.
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<H4><A name=Fl_Menu_.replace>void Fl_Menu_::replace(int n, const char *)</A>
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</H4>
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Changes the text of item <TT>n</TT>. The passed string is copied.
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<H4><A name=Fl_Menu_.remove>void Fl_Menu_::remove(int n)</A></H4>
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Deletes item <TT>n</TT> from the menu.
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<H4><A name=Fl_Menu_.shortcut>void Fl_Menu_::shortcut(int i, int n);</A></H4>
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Changes the shortcut of item <TT>i</TT> to <TT>n</TT>.
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<H4><A name=Fl_Menu_.mode>void Fl_Menu_::mode(int i,int x);</A></H4>
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Changes the flags of item <TT>i</TT>.
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<H4><A name=Fl_Menu_.textcolor>Fl_Color Fl_Menu_::textcolor() const
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<BR> void Fl_Menu_::textcolor(Fl_Color)</A></H4>
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Get or set the current color of menu item labels.
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<H4><A name=Fl_Menu_.textfont>Fl_Font Fl_Menu_::textfont() const
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<BR> void Fl_Menu_::textfont(Fl_Font)</A></H4>
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Get or set the current font of menu item labels.
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<H4><A name=Fl_Menu_.textsize>uchar Fl_Menu_::textsize() const
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<BR> void Fl_Menu_::textsize(uchar)</A></H4>
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Get or set the font size of menu item labels.
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<H4><A name=Fl_Menu_.down_box>Fl_Boxtype Fl_Menu_::down_box() const
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<BR> void Fl_Menu_::down_box(Fl_Boxtype)</A></H4>
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This box type is used to surround the currently-selected items in the
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menus. If this is <TT>FL_NO_BOX</TT> then it acts like <TT>
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FL_THIN_UP_BOX</TT> and <TT>selection_color()</TT> acts like <TT>
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FL_WHITE</TT>, for back compatability. </BODY></HTML>
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