1 ------------------------------------------------------------------------------
3 -- GNAT ncurses Binding --
5 -- Terminal_Interface.Curses.Mouse --
9 ------------------------------------------------------------------------------
10 -- Copyright (c) 1998 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 <juergen.pfeifer@gmx.net> 1996
39 -- Binding Version 01.00
40 ------------------------------------------------------------------------------
43 with Terminal_Interface.Curses.Aux; use Terminal_Interface.Curses.Aux;
44 with Interfaces.C; use Interfaces.C;
47 package body Terminal_Interface.Curses.Mouse is
49 use type System.Bit_Order;
50 use type Interfaces.C.int;
52 function Has_Mouse return Boolean
54 function Mouse_Avail return C_Int;
55 pragma Import (C, Mouse_Avail, "_nc_has_mouse");
57 if Has_Key (Key_Mouse) or else Mouse_Avail /= 0 then
64 function Get_Mouse return Mouse_Event
66 type Event_Access is access all Mouse_Event;
68 function Getmouse (Ev : Event_Access) return C_Int;
69 pragma Import (C, Getmouse, "getmouse");
71 Event : aliased Mouse_Event;
73 if Getmouse (Event'Access) = Curses_Err then
74 raise Curses_Exception;
79 procedure Register_Reportable_Event (Button : in Mouse_Button;
80 State : in Button_State;
81 Mask : in out Event_Mask)
83 Button_Nr : constant Natural := Mouse_Button'Pos (Button);
84 State_Nr : constant Natural := Button_State'Pos (State);
86 if Button in Modifier_Keys and then State /= Pressed then
87 raise Curses_Exception;
89 if Button in Real_Buttons then
90 Mask := Mask or ((2 ** (6 * Button_Nr)) ** State_Nr);
92 Mask := Mask or (BUTTON_CTRL ** (Button_Nr - 4));
95 end Register_Reportable_Event;
97 procedure Register_Reportable_Events (Button : in Mouse_Button;
98 State : in Button_States;
99 Mask : in out Event_Mask)
102 for S in Button_States'Range loop
104 Register_Reportable_Event (Button, S, Mask);
107 end Register_Reportable_Events;
109 function Start_Mouse (Mask : Event_Mask := All_Events)
112 function MMask (M : Event_Mask;
113 O : access Event_Mask) return Event_Mask;
114 pragma Import (C, MMask, "mousemask");
116 Old : aliased Event_Mask;
118 R := MMask (Mask, Old'Access);
122 procedure End_Mouse (Mask : in Event_Mask := No_Events)
128 procedure Dispatch_Event (Mask : in Event_Mask;
129 Button : out Mouse_Button;
130 State : out Button_State);
132 procedure Dispatch_Event (Mask : in Event_Mask;
133 Button : out Mouse_Button;
134 State : out Button_State) is
137 Button := Alt; -- preset to non real button;
138 if (Mask and BUTTON1_EVENTS) /= 0 then
140 elsif (Mask and BUTTON2_EVENTS) /= 0 then
142 elsif (Mask and BUTTON3_EVENTS) /= 0 then
144 elsif (Mask and BUTTON4_EVENTS) /= 0 then
147 if Button in Real_Buttons then
148 L := 2 ** (6 * Mouse_Button'Pos (Button));
149 for I in Button_State'Range loop
150 if (Mask and L) /= 0 then
158 if (Mask and BUTTON_CTRL) /= 0 then
160 elsif (Mask and BUTTON_SHIFT) /= 0 then
162 elsif (Mask and BUTTON_ALT) /= 0 then
168 procedure Get_Event (Event : in Mouse_Event;
169 Y : out Line_Position;
170 X : out Column_Position;
171 Button : out Mouse_Button;
172 State : out Button_State)
174 Mask : constant Event_Mask := Event.Bstate;
176 X := Column_Position (Event.X);
177 Y := Line_Position (Event.Y);
178 Dispatch_Event (Mask, Button, State);
181 procedure Unget_Mouse (Event : in Mouse_Event)
183 function Ungetmouse (Ev : Mouse_Event) return C_Int;
184 pragma Import (C, Ungetmouse, "ungetmouse");
186 if Ungetmouse (Event) = Curses_Err then
187 raise Curses_Exception;
191 function Enclosed_In_Window (Win : Window := Standard_Window;
192 Event : Mouse_Event) return Boolean
194 function Wenclose (Win : Window; Y : C_Int; X : C_Int)
196 pragma Import (C, Wenclose, "wenclose");
198 if Wenclose (Win, C_Int (Event.Y), C_Int (Event.X))
199 = Curses_Bool_False then
204 end Enclosed_In_Window;
206 function Mouse_Interval (Msec : Natural := 200) return Natural
208 function Mouseinterval (Msec : C_Int) return C_Int;
209 pragma Import (C, Mouseinterval, "mouseinterval");
211 return Natural (Mouseinterval (C_Int (Msec)));
214 end Terminal_Interface.Curses.Mouse;