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Diffstat (limited to 'body/fltk-widgets-groups-windows-double-cairo.adb')
| -rw-r--r-- | body/fltk-widgets-groups-windows-double-cairo.adb | 248 |
1 files changed, 248 insertions, 0 deletions
diff --git a/body/fltk-widgets-groups-windows-double-cairo.adb b/body/fltk-widgets-groups-windows-double-cairo.adb new file mode 100644 index 0000000..897c206 --- /dev/null +++ b/body/fltk-widgets-groups-windows-double-cairo.adb @@ -0,0 +1,248 @@ + + +-- Programmed by Jedidiah Barber +-- Released into the public domain + + +with + + Ada.Assertions, + Interfaces.C, + System.Address_To_Access_Conversions; + + +package body FLTK.Widgets.Groups.Windows.Double.Cairo is + + + package Chk renames Ada.Assertions; + + + + + ------------------------ + -- Functions From C -- + ------------------------ + + function new_fl_cairo_window + (W, H : in Interfaces.C.int) + return Storage.Integer_Address; + pragma Import (C, new_fl_cairo_window, "new_fl_cairo_window"); + pragma Inline (new_fl_cairo_window); + + procedure free_fl_cairo_window + (W : in Storage.Integer_Address); + pragma Import (C, free_fl_cairo_window, "free_fl_cairo_window"); + pragma Inline (free_fl_cairo_window); + + + + + procedure fl_cairo_window_set_draw_cb + (W, F : in Storage.Integer_Address); + pragma Import (C, fl_cairo_window_set_draw_cb, "fl_cairo_window_set_draw_cb"); + pragma Inline (fl_cairo_window_set_draw_cb); + + + + + procedure fl_cairo_window_draw + (W : in Storage.Integer_Address); + pragma Import (C, fl_cairo_window_draw, "fl_cairo_window_draw"); + pragma Inline (fl_cairo_window_draw); + + function fl_cairo_window_handle + (W : in Storage.Integer_Address; + E : in Interfaces.C.int) + return Interfaces.C.int; + pragma Import (C, fl_cairo_window_handle, "fl_cairo_window_handle"); + pragma Inline (fl_cairo_window_handle); + + + + + ---------------------- + -- Callback Hooks -- + ---------------------- + + package Cairo_Convert is new System.Address_To_Access_Conversions (Cairo_Window'Class); + + + procedure Cairo_Draw_Hook + (C_Addr, Cairo_Addr : in Storage.Integer_Address); + + pragma Convention (C, Cairo_Draw_Hook); + + procedure Cairo_Draw_Hook + (C_Addr, Cairo_Addr : in Storage.Integer_Address) + is + Ada_Addr : System.Address := + Storage.To_Address (fl_widget_get_user_data (C_Addr)); + Ada_Object : access Cairo_Window'Class := + Cairo_Convert.To_Pointer (Ada_Addr); + begin + pragma Assert (Ada_Object /= null); + if Ada_Object.My_Func /= null then + Ada_Object.My_Func (Cairo_Window (Ada_Object.all), Storage.To_Address (Cairo_Addr)); + end if; + exception + when Chk.Assertion_Error => raise Internal_FLTK_Error; + end Cairo_Draw_Hook; + + + + + ------------------- + -- Destructors -- + ------------------- + + procedure Extra_Final + (This : in out Cairo_Window) is + begin + Extra_Final (Double_Window (This)); + end Extra_Final; + + + procedure Finalize + (This : in out Cairo_Window) is + begin + Extra_Final (This); + if This.Void_Ptr /= Null_Pointer and This.Needs_Dealloc then + free_fl_cairo_window (This.Void_Ptr); + This.Void_Ptr := Null_Pointer; + end if; + end Finalize; + + + + + -------------------- + -- Constructors -- + -------------------- + + procedure Extra_Init + (This : in out Cairo_Window; + X, Y, W, H : in Integer; + Text : in String) is + begin + fl_cairo_window_set_draw_cb (This.Void_Ptr, Storage.To_Integer (Cairo_Draw_Hook'Address)); + Extra_Init (Double_Window (This), X, Y, W, H, Text); + end Extra_Init; + + + procedure Initialize + (This : in out Cairo_Window) is + begin + This.Draw_Ptr := fl_cairo_window_draw'Address; + This.Handle_Ptr := fl_cairo_window_handle'Address; + end Initialize; + + + package body Forge is + + function Create + (X, Y, W, H : in Integer; + Text : in String := "") + return Cairo_Window is + begin + return This : Cairo_Window do + This.Void_Ptr := new_fl_cairo_window + (Interfaces.C.int (W), + Interfaces.C.int (H)); + This.Reposition (X, Y); + This.Set_Label (Text); + Extra_Init (This, X, Y, W, H, Text); + end return; + end Create; + + + function Create + (Parent : in out Group'Class; + X, Y, W, H : in Integer; + Text : in String := "") + return Cairo_Window is + begin + return This : Cairo_Window := Create (X, Y, W, H, Text) do + Parent.Add (This); + end return; + end Create; + + + function Create + (W, H : in Integer; + Text : in String) + return Cairo_Window is + begin + return This : Cairo_Window do + This.Void_Ptr := new_fl_cairo_window + (Interfaces.C.int (W), + Interfaces.C.int (H)); + This.Set_Label (Text); + Extra_Init (This, This.Get_X, This.Get_Y, W, H, Text); + end return; + end Create; + + + function Create + (Parent : in out Group'Class; + W, H : in Integer; + Text : in String) + return Cairo_Window is + begin + return This : Cairo_Window := Create (W, H, Text) do + Parent.Add (This); + end return; + end Create; + + + function Create + (W, H : in Integer) + return Cairo_Window is + begin + return This : Cairo_Window do + This.Void_Ptr := new_fl_cairo_window + (Interfaces.C.int (W), + Interfaces.C.int (H)); + Extra_Init (This, This.Get_X, This.Get_Y, W, H, This.Get_Label); + end return; + end Create; + + + function Create + (Parent : in out Group'Class; + W, H : in Integer) + return Cairo_Window is + begin + return This : Cairo_Window := Create (W, H) do + Parent.Add (This); + end return; + end Create; + + end Forge; + + + + + ------------------------ + -- Cairo Window API -- + ------------------------ + + procedure Set_Cairo_Draw + (This : in out Cairo_Window; + Func : in Cairo_Callback) is + begin + This.My_Func := Func; + end Set_Cairo_Draw; + + + + + procedure Draw + (This : in out Cairo_Window) is + begin + Double_Window (This).Draw; + end Draw; + + +end FLTK.Widgets.Groups.Windows.Double.Cairo; + + |