https://invisible-island.net/ncurses/Ada95
------------------------------------------------------------------------------ -- -- -- GNAT ncurses Binding -- -- -- -- Terminal_Interface.Curses.Mouse -- -- -- -- B O D Y -- -- -- ------------------------------------------------------------------------------ -- Copyright 2018,2020 Thomas E. Dickey -- -- Copyright 1999-2009,2014 Free Software Foundation, Inc. -- -- -- -- Permission is hereby granted, free of charge, to any person obtaining a -- -- copy of this software and associated documentation files (the -- -- "Software"), to deal in the Software without restriction, including -- -- without limitation the rights to use, copy, modify, merge, publish, -- -- distribute, distribute with modifications, sublicense, and/or sell -- -- copies of the Software, and to permit persons to whom the Software is -- -- furnished to do so, subject to the following conditions: -- -- -- -- The above copyright notice and this permission notice shall be included -- -- in all copies or substantial portions of the Software. -- -- -- -- THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS -- -- OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF -- -- MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. -- -- IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, -- -- DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR -- -- OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR -- -- THE USE OR OTHER DEALINGS IN THE SOFTWARE. -- -- -- -- Except as contained in this notice, the name(s) of the above copyright -- -- holders shall not be used in advertising or otherwise to promote the -- -- sale, use or other dealings in this Software without prior written -- -- authorization. -- ------------------------------------------------------------------------------ -- Author: Juergen Pfeifer, 1996 -- Version Control: -- @Revision: 1.28 @ -- @Date: 2020/06/27 18:50:44 @ -- Binding Version 01.00 ------------------------------------------------------------------------------ with Terminal_Interface.Curses.Aux; use Terminal_Interface.Curses.Aux; with Interfaces.C; use Interfaces.C; use Interfaces; package body Terminal_Interface.Curses.Mouse is function Has_Mouse return Boolean is function Mouse_Avail return C_Int; pragma Import (C, Mouse_Avail, "has_mouse"); begin if Has_Key (Key_Mouse) or else Mouse_Avail /= 0 then return True; else return False; end if; end Has_Mouse; function Get_Mouse return Mouse_Event is type Event_Access is access all Mouse_Event; function Getmouse (Ev : Event_Access) return C_Int; pragma Import (C, Getmouse, "getmouse"); Event : aliased Mouse_Event; begin if Getmouse (Event'Access) = Curses_Err then raise Curses_Exception; end if; return Event; end Get_Mouse; procedure Register_Reportable_Event (Button : Mouse_Button; State : Button_State; Mask : in out Event_Mask) is Button_Nr : constant Natural := Mouse_Button'Pos (Button); State_Nr : constant Natural := Button_State'Pos (State); begin if Button in Modifier_Keys and then State /= Pressed then raise Curses_Exception; else if Button in Real_Buttons then Mask := Mask or ((2 ** (6 * Button_Nr)) ** State_Nr); else Mask := Mask or (BUTTON_CTRL ** (Button_Nr - 4)); end if; end if; end Register_Reportable_Event; procedure Register_Reportable_Events (Button : Mouse_Button; State : Button_States; Mask : in out Event_Mask) is begin for S in Button_States'Range loop if State (S) then Register_Reportable_Event (Button, S, Mask); end if; end loop; end Register_Reportable_Events; function Start_Mouse (Mask : Event_Mask := All_Events) return Event_Mask is function MMask (M : Event_Mask; O : access Event_Mask) return Event_Mask; pragma Import (C, MMask, "mousemask"); R : Event_Mask; Old : aliased Event_Mask; begin R := MMask (Mask, Old'Access); if R = No_Events then Beep; end if; return Old; end Start_Mouse; procedure End_Mouse (Mask : Event_Mask := No_Events) is begin if Mask /= No_Events then Beep; end if; end End_Mouse; procedure Dispatch_Event (Mask : Event_Mask; Button : out Mouse_Button; State : out Button_State); procedure Dispatch_Event (Mask : Event_Mask; Button : out Mouse_Button; State : out Button_State) is L : Event_Mask; begin Button := Alt; -- preset to non real button; if (Mask and BUTTON1_EVENTS) /= 0 then Button := Left; elsif (Mask and BUTTON2_EVENTS) /= 0 then Button := Middle; elsif (Mask and BUTTON3_EVENTS) /= 0 then Button := Right; elsif (Mask and BUTTON4_EVENTS) /= 0 then Button := Button4; end if; if Button in Real_Buttons then State := Released; -- preset to non real button; L := 2 ** (6 * Mouse_Button'Pos (Button)); for I in Button_State'Range loop if (Mask and L) /= 0 then State := I; exit; end if; L := 2 * L; end loop; else State := Pressed; if (Mask and BUTTON_CTRL) /= 0 then Button := Control; elsif (Mask and BUTTON_SHIFT) /= 0 then Button := Shift; elsif (Mask and BUTTON_ALT) /= 0 then Button := Alt; end if; end if; end Dispatch_Event; procedure Get_Event (Event : Mouse_Event; Y : out Line_Position; X : out Column_Position; Button : out Mouse_Button; State : out Button_State) is Mask : constant Event_Mask := Event.Bstate; begin X := Column_Position (Event.X); Y := Line_Position (Event.Y); Dispatch_Event (Mask, Button, State); end Get_Event; procedure Unget_Mouse (Event : Mouse_Event) is function Ungetmouse (Ev : Mouse_Event) return C_Int; pragma Import (C, Ungetmouse, "ungetmouse"); begin if Ungetmouse (Event) = Curses_Err then raise Curses_Exception; end if; end Unget_Mouse; function Enclosed_In_Window (Win : Window := Standard_Window; Event : Mouse_Event) return Boolean is function Wenclose (Win : Window; Y : C_Int; X : C_Int) return Curses_Bool; pragma Import (C, Wenclose, "wenclose"); begin if Wenclose (Win, C_Int (Event.Y), C_Int (Event.X)) = Curses_Bool_False then return False; else return True; end if; end Enclosed_In_Window; function Mouse_Interval (Msec : Natural := 200) return Natural is function Mouseinterval (Msec : C_Int) return C_Int; pragma Import (C, Mouseinterval, "mouseinterval"); begin return Natural (Mouseinterval (C_Int (Msec))); end Mouse_Interval; end Terminal_Interface.Curses.Mouse;