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with Interfaces.C;
with System;
use type System.Address;
use type Interfaces.C.int;
use type Interfaces.C.unsigned_long;
package body FLTK.Widgets.Menus is
function Shortcut
(Key : Pressable_Key)
return Shortcut_Key is
begin
return This : Shortcut_Key do
This.Modifier := Mod_None;
This.Keypress := Key;
end return;
end Shortcut;
function Key_To_C
(Key : Shortcut_Key)
return Interfaces.C.unsigned_long is
begin
return Interfaces.C.unsigned_long (Key.Modifier) *
65536 + Character'Pos (Key.Keypress);
end Key_To_C;
function "+"
(Left, Right : in Modifier_Key)
return Modifier_Key is
begin
return Left or Right;
end "+";
function "+"
(Left : in Modifier_Key;
Right : in Pressable_Key)
return Shortcut_Key is
begin
return This : Shortcut_Key do
This.Modifier := Left;
This.Keypress := Right;
end return;
end "+";
function "+"
(Left : in Modifier_Key;
Right : in Shortcut_Key)
return Shortcut_Key is
begin
return This : Shortcut_Key do
This.Modifier := Left or Right.Modifier;
This.Keypress := Right.Keypress;
end return;
end "+";
function "+"
(Left, Right : in Menu_Flag)
return Menu_Flag is
begin
return Left or Right;
end "+";
function fl_menu_add
(M : in System.Address;
T : in Interfaces.C.char_array;
S : in Interfaces.C.unsigned_long;
C, U : in System.Address;
F : in Interfaces.C.unsigned_long)
return Interfaces.C.int;
pragma Import (C, fl_menu_add, "fl_menu_add");
function fl_menu_mvalue
(M : in System.Address)
return System.Address;
pragma Import (C, fl_menu_mvalue, "fl_menu_mvalue");
function fl_menuitem_value
(MI : in System.Address)
return Interfaces.C.int;
pragma Import (C, fl_menuitem_value, "fl_menuitem_value");
procedure Item_Hook (M, U : in System.Address);
pragma Convention (C, Item_Hook);
procedure Item_Hook
(M, U : in System.Address)
is
Ada_Widget : access Widget'Class :=
Widget_Convert.To_Pointer (fl_widget_get_user_data (M));
Action : Widget_Callback := Callback_Convert.To_Pointer (U);
begin
Action.all (Ada_Widget.all);
end Item_Hook;
procedure Add
(This : in out Menu;
Text : in String;
Action : in Widget_Callback := null;
Shortcut : in Shortcut_Key := No_Key;
Flags : in Menu_Flag := Flag_Normal)
is
Place : Interfaces.C.int;
Callback, User_Data : System.Address;
begin
if Action = null then
Callback := System.Null_Address;
User_Data := System.Null_Address;
else
Callback := Item_Hook'Address;
User_Data := Callback_Convert.To_Address (Action);
end if;
Place := fl_menu_add
(This.Void_Ptr,
Interfaces.C.To_C (Text),
Key_To_C (Shortcut),
Callback,
User_Data,
Interfaces.C.unsigned_long (Flags));
end Add;
function Chosen
(This : in Menu'Class)
return Menu_Item is
begin
return Item : Menu_Item do
Item.Void_Ptr := fl_menu_mvalue (This.Void_Ptr);
end return;
end Chosen;
function Value
(Item : in Menu_Item)
return Boolean is
begin
return fl_menuitem_value (Item.Void_Ptr) /= 0;
end Value;
end FLTK.Widgets.Menus;
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