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|
-------------------------------------------------------------------------------
-- --
-- Ada Interface to the X Window System and Motif(tm)/Lesstif --
-- Copyright (c) 1996-2002 Hans-Frieder Vogt --
-- --
-- This program is free software; you can redistribute it and/or modify --
-- it under the terms of the GNU General Public License as published by --
-- the Free Software Foundation; either version 2 of the License, or --
-- (at your option) any later version. --
-- --
-- This program is distributed in the hope that it will be useful, --
-- but WITHOUT ANY WARRANTY; without even the implied warranty of --
-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. --
-- See the GNU General Public License for more details. --
-- --
-- You should have received a copy of the GNU General Public License --
-- along with this program; if not, write to the --
-- Free Software Foundation, Inc., --
-- 59 Temple Place - Suite 330, --
-- Boston, MA 02111-1307, USA. --
-- --
-- --
-- X Window System is copyrighted by the X Consortium --
-- Motif(tm) is copyrighted by the Open Software Foundation, Inc. --
-- --
-- --
-------------------------------------------------------------------------------
-------------------------------------------------------------------------------
--
-- HISTORY:
-- June 20, 1998 begin of history
-- 20 Jan 2002 H.-F. Vogt: add popup menu as an alternative to the
-- menu bar
-- comment out X_Lib.Tasking, because it seems
-- not to be necessary
--
-------------------------------------------------------------------------------
with Ada.Characters.Latin_1,
Ada.Calendar,
Ada.Text_Io,
Interfaces.C,
-- X_Lib.Tasking,
Xm_Widgets.Primitive.Label.Push_Button,
Xm_Widgets.Primitive.Label.Toggle_Button,
Xm_Widgets.Manager.Row_Column,
Xm_Widgets.Manager.Drawing_Area,
Xm_Widgets.Manager.Bulletin_Board.Message_Box;
use Ada.Characters.Latin_1,
Ada.Text_Io,
Interfaces.C,
Xm_Widgets.Primitive.Label,
Xm_Widgets.Manager.Bulletin_Board.Message_Box;
package body Clock_Global is
use Real_Functions;
Menu_Btn : Widget := Null_Widget;
procedure Redraw_Clock is
Division : constant Real := Ada.Numerics.Pi / 6.0;
Angle, S_Ang, C_Ang : Real;
Mark_Midpoint_X,
Mark_Midpoint_Y : Real;
Min_Finger : Point_Array (1 .. 3);
Hour_Finger : Point_Array (1 .. 3);
Mark_Inner_Radius : constant Real := 0.7*Radius;
Hour_Radius : constant Real := 0.5*Radius;
Min_Radius : constant Real := 0.9*Radius;
Sec_Radius : constant Real := 0.9*Radius;
Back_Radius : constant Real := 0.1*Radius;
Back_Width : constant Real := 0.2*Radius;
Shadow_Offset_X : constant Real := 0.05*Radius;
Shadow_Offset_Y : constant Real := 0.075*Radius;
begin
X_Clear_Window (Display, Xt_Window (The_Draw));
-- draw clock marks
for I in 0 .. 11 loop
Angle := Real (I) * Division;
-- X_Draw_Line (Display, Xt_Window (The_Draw), GC_Marks,
-- X_Lib.Position (Mid_X + Mark_Inner_Radius*Cos(Angle)),
-- X_Lib.Position (Mid_Y + Mark_Inner_Radius*Sin(Angle)),
-- X_Lib.Position (Mid_X + Radius*Cos(Angle)),
-- X_Lib.Position (Mid_Y + Radius*Sin(Angle)));
Mark_Midpoint_X := Mid_X + 0.5*(Mark_Inner_Radius+Radius)*Cos(Angle);
Mark_Midpoint_Y := Mid_Y + 0.5*(Mark_Inner_Radius+Radius)*Sin(Angle);
X_Fill_Arc (Display, Xt_Window (The_Draw), GC_Marks,
X_Lib.Position (Mark_Midpoint_X - 0.075*Radius),
X_Lib.Position (Mark_Midpoint_Y - 0.075*Radius),
X_Lib.Dimension (0.15*Radius),
X_Lib.Dimension (0.15*Radius),
0.0, 360.0);
end loop;
-- calculate minute finger
Angle := -0.5*Ada.Numerics.Pi + Real (Second mod 3600) * Ada.Numerics.Pi/1800.0;
S_Ang := Sin (Angle);
C_Ang := Cos (Angle);
Min_Finger (1).X := X_Lib.Position (Mid_X + Min_Radius*C_Ang);
Min_Finger (1).Y := X_Lib.Position (Mid_Y + Min_Radius*S_Ang);
Min_Finger (2).X := X_Lib.Position (-(Min_Radius+Back_Radius)*C_Ang -
0.5*Back_Width*S_Ang);
Min_Finger (2).Y := X_Lib.Position (-(Min_Radius+Back_Radius)*S_Ang +
0.5*Back_Width*C_Ang);
Min_Finger (3).X := X_Lib.Position (Back_Width*S_Ang);
Min_Finger (3).Y := X_Lib.Position (-Back_Width*C_Ang);
-- calculate hour finger
Angle := -0.5*Ada.Numerics.Pi + Real (Second) * Ada.Numerics.Pi/21600.0;
S_Ang := Sin (Angle);
C_Ang := Cos (Angle);
Hour_Finger (1).X := X_Lib.Position (Mid_X + Hour_Radius*C_Ang);
Hour_Finger (1).Y := X_Lib.Position (Mid_Y + Hour_Radius*S_Ang);
Hour_Finger (2).X := X_Lib.Position (- (Hour_Radius+Back_Radius)*C_Ang -
0.5*Back_Width*S_Ang);
Hour_Finger (2).Y := X_Lib.Position (- (Hour_Radius+Back_Radius)*S_Ang +
0.5*Back_Width*C_Ang);
Hour_Finger (3).X := X_Lib.Position ( Back_Width*S_Ang);
Hour_Finger (3).Y := X_Lib.Position (-Back_Width*C_Ang);
-- calculate second finger
Angle := -0.5*Ada.Numerics.Pi + Real (Second mod 60)*Ada.Numerics.Pi / 30.0;
-- draw shadow of second finger
X_Draw_Line (Display, Xt_Window (The_Draw), GC_Shadow,
X_Lib.Position (Mid_X+Shadow_Offset_X),
X_Lib.Position (Mid_Y+Shadow_Offset_Y),
X_Lib.Position (Mid_X + Sec_Radius*Cos (Angle)+Shadow_Offset_X),
X_Lib.Position (Mid_Y + Sec_Radius*Sin (Angle)+Shadow_Offset_Y));
-- draw shadow of minute finger
Min_Finger (1).X := Min_Finger (1).X + X_Lib.Position (Shadow_Offset_X);
Min_Finger (1).Y := Min_Finger (1).Y + X_Lib.Position (Shadow_Offset_Y);
X_Fill_Polygon (Display, Xt_Window (The_Draw), GC_Shadow,
Min_Finger, Convex, Previous);
Min_Finger (1).X := Min_Finger (1).X - X_Lib.Position (Shadow_Offset_X);
Min_Finger (1).Y := Min_Finger (1).Y - X_Lib.Position (Shadow_Offset_Y);
-- draw shadow of hour finger
Hour_Finger (1).X := Hour_Finger (1).X + X_Lib.Position (Shadow_Offset_X);
Hour_Finger (1).Y := Hour_Finger (1).Y + X_Lib.Position (Shadow_Offset_Y);
X_Fill_Polygon (Display, Xt_Window (The_Draw), GC_Shadow,
Hour_Finger, Convex, Previous);
Hour_Finger (1).X := Hour_Finger (1).X - X_Lib.Position (Shadow_Offset_X);
Hour_Finger (1).Y := Hour_Finger (1).Y - X_Lib.Position (Shadow_Offset_Y);
-- draw minute finger
X_Fill_Polygon (Display, Xt_Window (The_Draw), GC_Min,
Min_Finger, Convex, Previous);
-- draw hour finger
X_Fill_Polygon (Display, Xt_Window (The_Draw), GC_Hour,
Hour_Finger, Convex, Previous);
-- draw shadow of second finger
X_Draw_Line (Display, Xt_Window (The_Draw), GC_Sec,
X_Lib.Position (Mid_X),
X_Lib.Position (Mid_Y),
X_Lib.Position (Mid_X + Sec_Radius*Cos (Angle)),
X_Lib.Position (Mid_Y + Sec_Radius*Sin (Angle)));
end Redraw_Clock;
procedure Resize_Clock is
begin
Argl := Null_Arg_List;
Append_Get (Argl, Xm_N_Width, Width);
Append_Get (Argl, Xm_N_Height, Height);
Xt_Get_Values (The_Draw, Argl);
Mid_X := 0.5 * Real (Width);
Mid_Y := 0.5 * Real (Height);
if Width > Height then
Radius := 0.475*Real (Height);
else
Radius := 0.475*Real (Width);
end if;
end Resize_Clock;
procedure About_CB (W : in Widget;
Closure : in Xt_Pointer;
Call_Data : in Xt_Pointer) is
Button : Widget;
About_Text : constant String := "AdaClock -- a Motif(tm) version of xclock" &
LF &
"(c)1996-2002 Hans-Frieder Vogt" &
LF &
"(example program for Ada interface to Motif(tm))";
About_String : Xm_String;
begin
if About_Dialog = Null_Widget then
About_Dialog := Xm_Create_Information_Dialog (Appshell, "about_dialog");
About_String := Xm_String_Create_L_To_R (About_Text,
Xm_String_ISO8859_1);
Argl := Null_Arg_List;
Append_Set (Argl, Xm_N_Message_String, About_String);
Xt_Set_Values (About_Dialog, Argl);
Xm_String_Free (About_String);
Button := Xt_Name_To_Widget (About_Dialog, Cancel_Button_Name);
Xt_Unmanage_Child (Button);
Button := Xt_Name_To_Widget (About_Dialog, Help_Button_Name);
Xt_Unmanage_Child (Button);
Xt_Manage_Child (About_Dialog);
else
if not Xt_Is_Managed (About_Dialog) then
Xt_Manage_Child (About_Dialog);
end if;
end if;
end About_CB;
procedure Quit_CB (W : in Widget;
Closure : in Xt_Pointer;
Call_Data : in Xt_Pointer) is
begin
-- raise Leave_Program;
Xt_App_Set_Exit_Flag (App_Con);
end Quit_CB;
procedure Expose_Clock_CB (W : in Widget;
Closure : in Xt_Pointer;
Call_Data : in Xt_Pointer) is
begin
Redraw_Clock;
end Expose_Clock_CB;
procedure Resize_Clock_CB (W : in Widget;
Closure : in Xt_Pointer;
Call_Data : in Xt_Pointer) is
begin
Resize_Clock;
end Resize_Clock_CB;
procedure Input_CB (W : in Widget;
Closure : in Xt_Pointer;
Call_Data : in Xt_Pointer) is
use Xm_Widgets.Manager.Drawing_Area,
Xm_Widgets.Primitive.Label.Push_Button,
Xm_Widgets.Primitive.Label.Toggle_Button, X_Lib;
CB_Struct : Xm_Drawing_Area_Callback_Struct_Access;
Event : X_Event_Pointer;
Exit_Btn, About_Btn : Widget;
begin
CB_Struct := To_Callback_Struct (Call_Data);
Event := CB_Struct.Event;
case Event.Ev_Type is
when Button_Press =>
-- if popup menu wasn't created, create it now
--
if Popup_Menu = Null_Widget then
Popup_Menu := Xm_Widgets.Manager.Row_Column.Xm_Create_Popup_Menu
(The_Draw, "popup");
Menu_Btn := Xm_Create_Toggle_Button (Popup_Menu, "menu_show");
Xt_Manage_Child (Menu_Btn);
Exit_Btn := Xm_Create_Push_Button (Popup_Menu, "file_exit");
Xt_Manage_Child (Exit_Btn);
About_Btn := Xm_Create_Push_Button (Popup_Menu, "help_about");
Xt_Manage_Child (About_Btn);
Xt_Add_Callback (Menu_Btn,
Xm_Widgets.Primitive.Label.Toggle_Button.Xm_N_Value_Changed_Callback,
Menu_CB'Access);
Xt_Add_Callback (Exit_Btn,
Xm_Widgets.Primitive.Label.Push_Button.Xm_N_Activate_Callback,
Quit_CB'Access);
Xt_Add_Callback (About_Btn,
Xm_Widgets.Primitive.Label.Push_Button.Xm_N_Activate_Callback,
About_CB'Access);
end if;
-- place the popup menu at the position where the event occured
--
Xm_Widgets.Manager.Row_Column.Xm_Menu_Position (Popup_Menu, Event);
Xm_Toggle_Button_Set_State (Menu_Btn, Xt_Is_Managed (The_Menu_Bar),
False);
-- make the popup menu visible
--
if not Xt_Is_Managed (Popup_Menu) then
Xt_Manage_Child (Popup_Menu);
end if;
when others =>
null;
end case;
end Input_CB;
procedure Menu_CB (W : in Widget;
Closure : in Xt_Pointer;
Call_Data : in Xt_Pointer) is
begin
if Xt_Is_Managed (The_Menu_Bar) then
Xt_Unmanage_Child (The_Menu_Bar);
else
Xt_Manage_Child (The_Menu_Bar);
end if;
end Menu_CB;
procedure Timeout_CB (Client_Data : in Xt_Pointer;
ID : in out Interval_ID) is
use Ada.Calendar;
begin
if ID /= Null_Interval_ID or else Timer_ID = Null_Interval_ID then
Timer_ID := Xt_App_Add_Time_Out (App_Con, 1000, Timeout_CB'Access,
Client_Data);
end if;
-- X_Lib.Tasking.Resource.Release;
Second := Integer (Seconds (Clock));
-- X_Lib.Tasking.Resource.Seize;
Redraw_Clock;
end Timeout_CB;
end Clock_Global;
|
