1 ------------------------------------------------------------------------------
3 -- GNAT ncurses Binding --
5 -- Terminal_Interface.Curses.Mouse --
9 ------------------------------------------------------------------------------
10 -- Copyright (c) 1998,2004 Free Software Foundation, Inc. --
12 -- Permission is hereby granted, free of charge, to any person obtaining a --
13 -- copy of this software and associated documentation files (the --
14 -- "Software"), to deal in the Software without restriction, including --
15 -- without limitation the rights to use, copy, modify, merge, publish, --
16 -- distribute, distribute with modifications, sublicense, and/or sell --
17 -- copies of the Software, and to permit persons to whom the Software is --
18 -- furnished to do so, subject to the following conditions: --
20 -- The above copyright notice and this permission notice shall be included --
21 -- in all copies or substantial portions of the Software. --
23 -- THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS --
24 -- OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF --
25 -- MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. --
26 -- IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, --
27 -- DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR --
28 -- OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR --
29 -- THE USE OR OTHER DEALINGS IN THE SOFTWARE. --
31 -- Except as contained in this notice, the name(s) of the above copyright --
32 -- holders shall not be used in advertising or otherwise to promote the --
33 -- sale, use or other dealings in this Software without prior written --
35 ------------------------------------------------------------------------------
36 -- Author: Juergen Pfeifer, 1996
39 -- $Date: 2004/08/21 21:37:00 $
40 -- Binding Version 01.00
41 ------------------------------------------------------------------------------
44 with Terminal_Interface.Curses.Aux; use Terminal_Interface.Curses.Aux;
45 with Interfaces.C; use Interfaces.C;
48 package body Terminal_Interface.Curses.Mouse is
50 use type System.Bit_Order;
51 use type Interfaces.C.int;
53 function Has_Mouse return Boolean
55 function Mouse_Avail return C_Int;
56 pragma Import (C, Mouse_Avail, "_nc_has_mouse");
58 if Has_Key (Key_Mouse) or else Mouse_Avail /= 0 then
65 function Get_Mouse return Mouse_Event
67 type Event_Access is access all Mouse_Event;
69 function Getmouse (Ev : Event_Access) return C_Int;
70 pragma Import (C, Getmouse, "getmouse");
72 Event : aliased Mouse_Event;
74 if Getmouse (Event'Access) = Curses_Err then
75 raise Curses_Exception;
80 procedure Register_Reportable_Event (Button : in Mouse_Button;
81 State : in Button_State;
82 Mask : in out Event_Mask)
84 Button_Nr : constant Natural := Mouse_Button'Pos (Button);
85 State_Nr : constant Natural := Button_State'Pos (State);
87 if Button in Modifier_Keys and then State /= Pressed then
88 raise Curses_Exception;
90 if Button in Real_Buttons then
91 Mask := Mask or ((2 ** (6 * Button_Nr)) ** State_Nr);
93 Mask := Mask or (BUTTON_CTRL ** (Button_Nr - 4));
96 end Register_Reportable_Event;
98 procedure Register_Reportable_Events (Button : in Mouse_Button;
99 State : in Button_States;
100 Mask : in out Event_Mask)
103 for S in Button_States'Range loop
105 Register_Reportable_Event (Button, S, Mask);
108 end Register_Reportable_Events;
110 function Start_Mouse (Mask : Event_Mask := All_Events)
113 function MMask (M : Event_Mask;
114 O : access Event_Mask) return Event_Mask;
115 pragma Import (C, MMask, "mousemask");
117 Old : aliased Event_Mask;
119 R := MMask (Mask, Old'Access);
120 if R = No_Events then
126 procedure End_Mouse (Mask : in Event_Mask := No_Events)
129 if Mask /= No_Events then
134 procedure Dispatch_Event (Mask : in Event_Mask;
135 Button : out Mouse_Button;
136 State : out Button_State);
138 procedure Dispatch_Event (Mask : in Event_Mask;
139 Button : out Mouse_Button;
140 State : out Button_State) is
143 Button := Alt; -- preset to non real button;
144 if (Mask and BUTTON1_EVENTS) /= 0 then
146 elsif (Mask and BUTTON2_EVENTS) /= 0 then
148 elsif (Mask and BUTTON3_EVENTS) /= 0 then
150 elsif (Mask and BUTTON4_EVENTS) /= 0 then
153 if Button in Real_Buttons then
154 L := 2 ** (6 * Mouse_Button'Pos (Button));
155 for I in Button_State'Range loop
156 if (Mask and L) /= 0 then
164 if (Mask and BUTTON_CTRL) /= 0 then
166 elsif (Mask and BUTTON_SHIFT) /= 0 then
168 elsif (Mask and BUTTON_ALT) /= 0 then
174 procedure Get_Event (Event : in Mouse_Event;
175 Y : out Line_Position;
176 X : out Column_Position;
177 Button : out Mouse_Button;
178 State : out Button_State)
180 Mask : constant Event_Mask := Event.Bstate;
182 X := Column_Position (Event.X);
183 Y := Line_Position (Event.Y);
184 Dispatch_Event (Mask, Button, State);
187 procedure Unget_Mouse (Event : in Mouse_Event)
189 function Ungetmouse (Ev : Mouse_Event) return C_Int;
190 pragma Import (C, Ungetmouse, "ungetmouse");
192 if Ungetmouse (Event) = Curses_Err then
193 raise Curses_Exception;
197 function Enclosed_In_Window (Win : Window := Standard_Window;
198 Event : Mouse_Event) return Boolean
200 function Wenclose (Win : Window; Y : C_Int; X : C_Int)
202 pragma Import (C, Wenclose, "wenclose");
204 if Wenclose (Win, C_Int (Event.Y), C_Int (Event.X))
205 = Curses_Bool_False then
210 end Enclosed_In_Window;
212 function Mouse_Interval (Msec : Natural := 200) return Natural
214 function Mouseinterval (Msec : C_Int) return C_Int;
215 pragma Import (C, Mouseinterval, "mouseinterval");
217 return Natural (Mouseinterval (C_Int (Msec)));
220 end Terminal_Interface.Curses.Mouse;