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144 | with Ada.Numerics.Discrete_Random;
with Gnoga.Application.Multi_Connect;
with Gnoga.Gui.Base;
with Gnoga.Gui.Element.Common;
with Gnoga.Gui.Element.Form;
with Gnoga.Types;
with Gnoga.Gui.View;
with Gnoga.Gui.Window;
package body Random_Int.UI is
use Gnoga;
use all type Gnoga.String;
type App_Info is new Gnoga.Types.Connection_Data_Type with record
Window : Gnoga.Gui.Window.Pointer_To_Window_Class;
View : Gnoga.Gui.View.View_Type;
Min_Label : Gnoga.Gui.Element.Form.Label_Type;
Max_Label : Gnoga.Gui.Element.Form.Label_Type;
Input : Gnoga.Gui.Element.Form.Form_Type;
Min_Entry : Gnoga.Gui.Element.Form.Number_Type;
Max_Entry : Gnoga.Gui.Element.Form.Number_Type;
Result : Gnoga.Gui.Element.Form.Text_Type;
Generate : Gnoga.Gui.Element.Form.Submit_Button_Type;
Quit : Gnoga.Gui.Element.Common.Button_Type;
end record;
type App_Ptr is access all App_Info;
procedure On_Generate (Object : in out Gnoga.Gui.Base.Base_Type'Class) is
App : constant App_Ptr := App_Ptr (Object.Connection_Data);
Low : Integer;
High : Integer;
Result : Integer;
begin -- On_Generate
Min_Error :
begin
Low := Value (App.Min_Entry.Value);
exception -- Min_Error
when others =>
App.Min_Entry.Value (Value => "Error");
return;
end Min_Error;
Max_Error :
begin
High := Value (App.Max_Entry.Value);
exception -- Max_Error
when others =>
App.Max_Entry.Value (Value => "Error");
return;
end Max_Error;
if High < Low then
Result := High;
High := Low;
Low := Result;
end if;
App.Min_Entry.Value (Value => Low);
App.Max_Entry.Value (Value => High);
Get_Value :
declare
subtype Desired is Integer range Low .. High;
package Random is new Ada.Numerics.Discrete_Random (Result_Subtype => Desired);
Gen : Random.Generator;
begin -- Get_Value
Random.Reset (Gen => Gen);
Result := Random.Random (Gen);
App.Result.Value (Value => Image (Result));
end Get_Value;
exception -- On_Generate
when E : others =>
Gnoga.Log (Message => "On_Generate: ", Occurrence => E);
end On_Generate;
End_Message : constant Gnoga.String := "Random Integers ended.";
procedure On_Quit (Object : in out Gnoga.Gui.Base.Base_Type'Class) is
App : constant App_Ptr := App_Ptr (Object.Connection_Data);
View : Gnoga.Gui.View.View_Type;
begin -- On_Quit
App.View.Remove;
View.Create (Parent => App.Window.all);
View.Put_Line (Message => End_Message);
App.Window.Close;
App.Window.Close_Connection;
exception -- On_Quit
when E : others =>
Gnoga.Log (Message => "On_Quit: ", Occurrence => E);
end On_Quit;
procedure On_Connect
(Main_Window : in out Gnoga.Gui.Window.Window_Type'Class;
Connection : access Gnoga.Application.Multi_Connect.Connection_Holder_Type)
is
Placeholder : constant Gnoga.String := "Enter an integer";
App : constant App_Ptr := new App_Info;
begin -- On_Connect
Main_Window.Connection_Data (Data => App);
App.Window := Main_Window'Unchecked_Access;
App.View.Create (Parent => Main_Window);
App.View.Box_Width (Value => 500);
App.Input.Create (Parent => App.View);
App.Input.Text_Alignment (Value => Gnoga.Gui.Element.Right);
App.Min_Entry.Create (Form => App.Input);
App.Min_Entry.Required;
App.Min_Entry.Place_Holder (Value => Placeholder);
App.Min_Label.Create (Form => App.Input, Label_For => App.Min_Entry, Content => "Minimum value");
App.Input.New_Line;
App.Max_Entry.Create (Form => App.Input);
App.Max_Entry.Required;
App.Max_Entry.Place_Holder (Value => Placeholder);
App.Max_Label.Create (Form => App.Input, Label_For => App.Max_Entry, Content => "Maximum value");
App.Input.New_Line;
App.Result.Create (Form => App.Input);
App.Generate.Create (Form => App.Input, Value => "Generate");
App.Input.On_Submit_Handler (Handler => On_Generate'Access);
App.Input.New_Line;
App.Input.New_Line;
App.Quit.Create (Parent => App.Input, Content => "Quit");
App.Quit.On_Click_Handler (Handler => On_Quit'Access);
exception -- On_Connect
when E : others =>
Gnoga.Log (Message => "On_Connect: ", Occurrence => E);
end On_Connect;
begin -- Random_Int.UI
Gnoga.Application.Title (Name => "Random Integers");
Gnoga.Application.HTML_On_Close (HTML => End_Message);
Gnoga.Application.Multi_Connect.Initialize;
Gnoga.Application.Multi_Connect.On_Connect_Handler (Event => On_Connect'Access);
Gnoga.Application.Multi_Connect.Message_Loop;
exception -- Random_Int.UI
when E : others =>
Gnoga.Log (E);
end Random_Int.UI;
|