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ada_gui.adb
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ada_gui.adb
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-- An Ada-oriented GUI library
-- Implementation derived from Gnoga
--
-- Copyright (C) 2024 by PragmAda Software Engineering
--
-- Released under the terms of the 3-Clause BSD License. See https://opensource.org/licenses/BSD-3-Clause
with Ada.Containers.Vectors;
with Ada.Exceptions;
with Ada.Numerics.Elementary_Functions;
with Ada.Real_Time;
with Ada.Strings.Fixed;
with Ada.Unchecked_Conversion;
with Ada_GUI.Gnoga.Application;
with Ada_GUI.Gnoga.Gui.Element.Canvas.Context_2D;
with Ada_GUI.Gnoga.Gui.Element.Common;
with Ada_GUI.Gnoga.Gui.Element.Form;
with Ada_GUI.Gnoga.Gui.Element.Multimedia;
with Ada_GUI.Gnoga.Gui.View.Console;
with Ada_GUI.Gnoga.Gui.View.Grid;
with Ada_GUI.Gnoga.Gui.Window;
with Ada_GUI.Gnoga.Colors;
package body Ada_GUI is
type Form_Set is array (Positive range <>, Positive range <>) of Gnoga.Gui.Element.Form.Form_Type;
type Form_Ptr is access Form_Set; -- Extensive use of access due to nature of Gnoga
package Column_Maps is new Ada.Containers.Vectors (Index_Type => Positive, Element_Type => Boolean);
package Row_Maps is new Ada.Containers.Vectors
(Index_Type => Positive, Element_Type => Column_Maps.Vector, "=" => Column_Maps."=");
Window : Gnoga.Gui.Window.Window_Type;
View : Gnoga.Gui.View.Console.Console_View_Type;
Grid : Gnoga.Gui.View.Grid.Grid_View_Type;
Form : Form_Ptr;
Valid : Row_Maps.Vector; -- Valid (Row) (Column) is True if (Row, Column) is an Area
Setup : Boolean := False with Atomic;
function Set_Up return Boolean is (Setup);
function Converted (Alignment : Alignment_ID) return Gnoga.Gui.Element.Alignment_Type is
(case Alignment is
when Left => Gnoga.Gui.Element.Left,
when Center => Gnoga.Gui.Element.Center,
when Right => Gnoga.Gui.Element.Right);
procedure Set_Up (Grid : in Grid_Set := (1 => (1 => (others => <>) ) );
ID : in Positive := 8080;
Title : in String := "Ada-GUI Application";
Icon : in String := "favicon.ico")
is
G_Grid : Gnoga.Gui.View.Grid.Grid_Rows_Type (Grid'Range (1), Grid'Range (2) );
begin -- Set_Up
Fill_Grid : for Row in Grid'Range (1) loop
Valid.Append (New_Item => Column_Maps.Empty_Vector);
Grid_Cols : for Column in Grid'Range (2) loop
G_Grid (Row, Column) := (if Grid (Row, Column).Kind = Area then Gnoga.Gui.View.Grid.COL else Gnoga.Gui.View.Grid.SPN);
Valid (Row).Append (New_Item => Grid (Row, Column).Kind = Area);
end loop Grid_Cols;
end loop Fill_Grid;
Gnoga.Application.Initialize (Main_Window => Window, ID => ID, Title => Title, Icon => Icon);
View.Create (Parent => Window);
Ada_GUI.Grid.Create (Parent => View, Layout => G_Grid);
Form := new Form_Set (Grid'Range (1), Grid'Range (2) );
All_Rows : for I in Form'Range (1) loop
All_Columns : for J in Form'Range (2) loop
if Grid (I, J).Kind = Area then
Form (I, J).Create (Parent => Ada_GUI.Grid.Panel (I, J).all);
Form (I, J).Text_Alignment (Value => Converted (Grid (I, J).Alignment) );
end if;
end loop All_Columns;
end loop All_Rows;
Setup := True;
end Set_Up;
function Window_Height return Positive is (Window.Inner_Height);
function Window_Width return Positive is (Window.Inner_Width);
type Radio_Info is record
Button : Gnoga.Gui.Element.Form.Radio_Button_Type;
Label : Gnoga.Gui.Element.Form.Label_Type;
end record;
type Radio_List is array (Positive range <>) of Radio_Info;
type Radio_Ptr is access Radio_List;
type Widget_Info (Kind : Widget_Kind_ID := Button) is record
case Kind is
when Audio_Player =>
Audio : Gnoga.Gui.Element.Multimedia.Audio_Access;
when Background_Text =>
Background : Gnoga.Gui.Element.Common.Span_Access;
when Button =>
Switch : Gnoga.Gui.Element.Common.Button_Access;
when Check_Box =>
Check : Gnoga.Gui.Element.Form.Check_Box_Access;
Check_Label : Gnoga.Gui.Element.Form.Label_Access;
when Graphic_Area =>
Canvas : Gnoga.Gui.Element.Canvas.Canvas_Access;
Context : Ada_GUI.Gnoga.Gui.Element.Canvas.Context_2D.Context_2D_Access;
Width : Natural;
Height : Natural;
Original_Width : Positive;
Original_Height : Positive;
when Image =>
Img : Gnoga.Gui.Element.Common.IMG_Access;
when Password_Box =>
Password : Gnoga.Gui.Element.Form.Password_Access;
Password_Label : Gnoga.Gui.Element.Form.Label_Access;
when Progress_Bar =>
Progress : Gnoga.Gui.Element.Common.Progress_Bar_Access;
when Radio_Buttons =>
Radio : Radio_Ptr;
when Selection_List =>
Selector : Gnoga.Gui.Element.Form.Selection_Access;
Multi : Boolean;
when Text_Area =>
Area : Gnoga.Gui.Element.Form.Text_Area_Access;
when Text_Box =>
Box : Gnoga.Gui.Element.Form.Text_Access;
Box_Label : Gnoga.Gui.Element.Form.Label_Access;
end case;
end record;
package Widget_Lists is new Ada.Containers.Vectors (Index_Type => Natural, Element_Type => Widget_Info);
Widget_List : Widget_Lists.Vector;
function Kind (ID : Widget_ID) return Widget_Kind_ID is (Widget_List.Element (ID.Value).Kind);
function Adjusted (Row : in Positive; Column : in Positive) return Positive;
-- If (Row, Column) is an Extension, reduces Column until (Row, Column) is an Area
procedure Break (Desired : in Boolean; Row : in Positive; Column : in Positive);
-- If Desired, make the next thing declared in Form (Row, Column) appear below existing things there
function Adjusted (Row : in Positive; Column : in Positive) return Positive is
begin -- Adjusted
Find : for C in reverse 1 .. Column loop
if Valid (Row) (C) then
return C;
end if;
end loop Find;
raise Program_Error;
end Adjusted;
procedure Break (Desired : in Boolean; Row : in Positive; Column : in Positive) is
-- Empty
begin -- Break
if Desired then
Form (Row, Column).New_Line;
end if;
end Break;
function New_Audio_Player (Row : Positive := 1;
Column : Positive := 1;
Break_Before : Boolean := False;
Source : String := "";
Controls : Boolean := True)
return Widget_ID is
ID : constant Widget_ID := (Value => Widget_List.Last_Index + 1);
Widget : Widget_Info (Kind => Audio_Player);
begin -- New_Audio_Player
Break (Desired => Break_Before, Row => Row, Column => Adjusted (Row, Column) );
Widget.Audio := new Gnoga.Gui.Element.Multimedia.Audio_Type;
Widget.Audio.Create (Parent => Form (Row, Adjusted (Row, Column) ),
Source => Source,
Controls => Controls,
Preload => True,
ID => ID.Value'Image);
Widget_List.Append (New_Item => Widget);
return ID;
end New_Audio_Player;
function New_Background_Text (Row : Positive := 1; Column : Positive := 1; Text : String := ""; Break_Before : Boolean := False)
return Widget_ID is
ID : constant Widget_ID := (Value => Widget_List.Last_Index + 1);
Widget : Widget_Info (Kind => Background_Text);
begin -- New_Background_Text
Break (Desired => Break_Before, Row => Row, Column => Adjusted (Row, Column) );
Widget.Background := new Gnoga.Gui.Element.Common.Span_Type;
Widget.Background.Create (Parent => Form (Row, Adjusted (Row, Column) ), Content => Text, ID => ID.Value'Image);
Widget_List.Append (New_Item => Widget);
return ID;
end New_Background_Text;
function New_Button (Row : Positive := 1; Column : Positive := 1; Text : String := ""; Break_Before : Boolean := False)
return Widget_ID is
ID : constant Widget_ID := (Value => Widget_List.Last_Index + 1);
Widget : Widget_Info (Kind => Button);
begin -- New_Button
Break (Desired => Break_Before, Row => Row, Column => Adjusted (Row, Column) );
Widget.Switch := new Gnoga.Gui.Element.Common.Button_Type;
Widget.Switch.Create (Parent => Form (Row, Adjusted (Row, Column) ), Content => Text, ID => ID.Value'Image);
Widget_List.Append (New_Item => Widget);
return ID;
end New_Button;
function New_Check_Box (Row : Positive := 1;
Column : Positive := 1;
Label : String := "";
Break_Before : Boolean := False;
Active : Boolean := False)
return Widget_ID is
ID : constant Widget_ID := (Value => Widget_List.Last_Index + 1);
Widget : Widget_Info (Kind => Check_Box);
begin -- New_Check_Box
Break (Desired => Break_Before, Row => Row, Column => Adjusted (Row, Column) );
Widget.Check := new Gnoga.Gui.Element.Form.Check_Box_Type;
Widget.Check.Create (Form => Form (Row, Adjusted (Row, Column) ), ID => ID.Value'Image);
Widget.Check.Checked (Value => Active);
Widget.Check_Label := new Gnoga.Gui.Element.Form.Label_Type;
Widget.Check_Label.Create
(Form => Form (Row, Adjusted (Row, Column) ), Label_For => Widget.Check.all, Content => Label, Auto_Place => False);
Widget_List.Append (New_Item => Widget);
return ID;
end New_Check_Box;
function New_Graphic_Area
(Row : Positive := 1; Column : Positive := 1; Width : Positive; Height : Positive; Break_Before : Boolean := False)
return Widget_ID is
ID : constant Widget_ID := (Value => Widget_List.Last_Index + 1);
Widget : Widget_Info (Kind => Graphic_Area);
begin -- New_Graphic_Area
Break (Desired => Break_Before, Row => Row, Column => Adjusted (Row, Column) );
Widget.Canvas := new Gnoga.Gui.Element.Canvas.Canvas_Type;
Widget.Canvas.Create (Parent => Form (Row, Adjusted (Row, Column) ), Width => Width, Height => Height, ID => ID.Value'Image);
Widget.Context := new Gnoga.Gui.Element.Canvas.Context_2D.Context_2D_Type;
Widget.Context.Get_Drawing_Context_2D (Canvas => Widget.Canvas.all);
Widget.Width := Width;
Widget.Height := Height;
Widget.Original_Width := Width;
Widget.Original_Height := Height;
Widget_List.Append (New_Item => Widget);
return ID;
end New_Graphic_Area;
function New_Image (Row : Positive := 1;
Column : Positive := 1;
Source : String := "";
Description : String := "";
Break_Before : Boolean := False)
return Widget_ID is
ID : constant Widget_ID := (Value => Widget_List.Last_Index + 1);
Widget : Widget_Info (Kind => Image);
begin -- New_Image
Break (Desired => Break_Before, Row => Row, Column => Adjusted (Row, Column) );
Widget.Img := new Gnoga.Gui.Element.Common.IMG_Type;
Widget.Img.Create (Parent => Form (Row, Adjusted (Row, Column) ), URl_Source => Source, Alternative_Text => Description);
Widget_List.Append (New_Item => Widget);
return ID;
end New_Image;
function New_Password_Box (Row : Positive := 1;
Column : Positive := 1;
Text : String := "";
Break_Before : Boolean := False;
Label : String := "";
Width : Positive := 20)
return Widget_ID is
ID : constant Widget_ID := (Value => Widget_List.Last_Index + 1);
Widget : Widget_Info (Kind => Password_Box);
begin -- New_Password_Box
Break (Desired => Break_Before, Row => Row, Column => Adjusted (Row, Column) );
Widget.Password := new Gnoga.Gui.Element.Form.Password_Type;
Widget.Password.Create (Form => Form (Row, Adjusted (Row, Column) ), Size => Width, Value => Text, ID => ID.Value'Image);
Widget.Password_Label := new Gnoga.Gui.Element.Form.Label_Type;
Widget.Password_Label.Create
(Form => Form (Row, Adjusted (Row, Column) ), Label_For => Widget.Password.all, Content => Label);
Widget_List.Append (New_Item => Widget);
return ID;
end New_Password_Box;
function New_Progress_Bar (Row : Positive := 1;
Column : Positive := 1;
Value : Natural := 0;
Maximum : Natural := 100;
Break_Before : Boolean := False)
return Widget_ID is
ID : constant Widget_ID := (Value => Widget_List.Last_Index + 1);
Widget : Widget_Info (Kind => Progress_Bar);
begin -- New_Progress_Bar
Break (Desired => Break_Before, Row => Row, Column => Adjusted (Row, Column) );
Widget.Progress := new Gnoga.Gui.Element.Common.Progress_Bar_Type;
Widget.Progress.Create (Parent => Form (Row, Adjusted (Row, Column) ), Value => Value, Maximum => Maximum);
Widget_List.Append (New_Item => Widget);
return ID;
end New_Progress_Bar;
use Ada.Strings.Unbounded;
Next_Button : Positive := 1;
function New_Radio_Buttons (Row : Positive := 1;
Column : Positive := 1;
Label : Text_List;
Break_Before : Boolean := False;
Orientation : Orientation_ID := Vertical)
return Widget_ID is
ID : constant Widget_ID := (Value => Widget_List.Last_Index + 1);
Widget : Widget_Info (Kind => Radio_Buttons);
Name : String := Next_Button'Image;
begin -- New_Radio_Buttons
Name (Name'First) := 'R';
Next_Button := Next_Button + 1;
Widget.Radio := new Radio_List (Label'Range);
Break (Desired => Break_Before, Row => Row, Column => Adjusted (Row, Column) );
All_Buttons : for I in Label'Range loop
Widget.Radio (I).Button.Create (Form => Form (Row, Adjusted (Row, Column) ),
Checked => I = Label'First,
Name => Name,
ID => I'Image & 'R' & ID.Value'Image);
Widget.Radio (I).Label.Create (Form => Form (Row, Adjusted (Row, Column) ),
Label_For => Widget.Radio (I).Button,
Content => To_String (Label (I) ),
Auto_Place => False);
if I < Label'Last and Orientation = Vertical then
Form (Row, Adjusted (Row, Column) ).New_Line;
end if;
end loop All_Buttons;
Widget_List.Append (New_Item => Widget);
return ID;
end New_Radio_Buttons;
function New_Selection_List (Row : Positive := 1;
Column : Positive := 1;
Text : Text_List := (1 .. 0 => <>);
Break_Before : Boolean := False;
Height : Positive := 1;
Multiple_Select : Boolean := False)
return Widget_ID is
ID : constant Widget_ID := (Value => Widget_List.Last_Index + 1);
Widget : Widget_Info (Kind => Selection_List);
begin -- New_Selection_List
Break (Desired => Break_Before, Row => Row, Column => Adjusted (Row, Column) );
Widget.Selector := new Gnoga.Gui.Element.Form.Selection_Type;
Widget.Selector.Create (Form => Form (Row, Adjusted (Row, Column) ),
Multiple_Select => Multiple_Select,
Visible_Lines => Height,
ID => ID.Value'Image);
Widget.Multi := Multiple_Select;
Widget_List.Append (New_Item => Widget);
Add_Options : for I in Text'Range loop
Widget.Selector.Add_Option (Value => To_String (Text (I) ), Text => To_String (Text (I) ) );
end loop Add_Options;
return ID;
end New_Selection_List;
function New_Text_Area (Row : Positive := 1;
Column : Positive := 1;
Text : String := "";
Break_Before : Boolean := False;
Width : Positive := 20;
Height : Positive := 2)
return Widget_ID is
ID : constant Widget_ID := (Value => Widget_List.Last_Index + 1);
Widget : Widget_Info (Kind => Text_Area);
begin -- New_Text_Area
Break (Desired => Break_Before, Row => Row, Column => Adjusted (Row, Column) );
Widget.Area := new Gnoga.Gui.Element.Form.Text_Area_Type;
Widget.Area.Create
(Form => Form (Row, Adjusted (Row, Column) ), Columns => Width, Rows => Height, Value => Text, ID => ID.Value'Image);
Widget_List.Append (New_Item => Widget);
return ID;
end New_Text_Area;
function New_Text_Box (Row : Positive := 1;
Column : Positive := 1;
Text : String := "";
Break_Before : Boolean := False;
Label : String := "";
Placeholder : String := "";
Width : Positive := 20)
return Widget_ID is
ID : constant Widget_ID := (Value => Widget_List.Last_Index + 1);
Widget : Widget_Info (Kind => Text_Box);
begin -- New_Text_Box
Break (Desired => Break_Before, Row => Row, Column => Adjusted (Row, Column) );
Widget.Box := new Gnoga.Gui.Element.Form.Text_Type;
Widget.Box.Create (Form => Form (Row, Adjusted (Row, Column) ), Size => Width, Value => Text, ID => ID.Value'Image);
Widget.Box_Label := new Gnoga.Gui.Element.Form.Label_Type;
Widget.Box_Label.Create (Form => Form (Row, Adjusted (Row, Column) ), Label_For => Widget.Box.all, Content => Label);
if Placeholder /= "" then
Widget.Box.Place_Holder (Value => Placeholder);
end if;
Widget_List.Append (New_Item => Widget);
return ID;
end New_Text_Box;
procedure Set_Title (Title : in String) is
-- Empty
begin -- Set_Title
Window.Document.Title (Value => Title);
end Set_Title;
procedure Show_Message_Box (Text : in String) is
-- Empty
begin -- Show_Message_Box
Window.Alert (Message => Text);
end Show_Message_Box;
protected Dialog_Control is -- Controls multiple calls to dialogs and calls to Next_Event while a call to a dialog is in progress
procedure Set_Ongoing (Value : in Boolean);
-- Makes Ongoing return Value
function Ongoing return Boolean;
-- Returns the last value passed to Set_Ongoing; False initially
entry Block;
-- Blocks the caller until not Ongoing
private -- Dialog_Control
In_Progress : Boolean := False;
end Dialog_Control;
function Next_Event (Timeout : Duration := Duration'Last) return Next_Result_Info is separate;
procedure Set_Hidden (ID : in Widget_ID; Hidden : in Boolean := True) is
Widget : Widget_Info renames Widget_List.Element (ID.Value);
begin -- Set_Hidden
case Widget.Kind is
when Audio_Player =>
Widget.Audio.Hidden (Value => Hidden);
when Background_Text =>
Widget.Background.Hidden (Value => Hidden);
when Button =>
Widget.Switch.Hidden (Value => Hidden);
when Check_Box =>
Widget.Check.Hidden (Value => Hidden);
Widget.Check_Label.Hidden (Value => Hidden);
when Graphic_Area =>
Widget.Canvas.Hidden (Value => Hidden);
when Image =>
Widget.Img.Hidden (Value => Hidden);
when Password_Box =>
Widget.Password.Hidden (Value => Hidden);
Widget.Password_Label.Hidden (Value => Hidden);
when Progress_Bar =>
Widget.Progress.Hidden (Value => Hidden);
when Radio_Buttons =>
All_Buttons : for I in Widget.Radio'Range loop
Widget.Radio (I).Button.Hidden (Value => Hidden);
Widget.Radio (I).Label.Hidden (Value => Hidden);
end loop All_Buttons;
when Selection_List =>
Widget.Selector.Hidden (Value => Hidden);
when Text_Area =>
Widget.Area.Hidden (Value => Hidden);
when Text_Box =>
Widget.Box.Hidden (Value => Hidden);
Widget.Box_Label.Hidden (Value => Hidden);
end case;
end Set_Hidden;
procedure Set_Visibility (ID : in Widget_ID; Visible : in Boolean := True) is
Widget : Widget_Info renames Widget_List.Element (ID.Value);
begin -- Set_Visibility
case Widget.Kind is
when Audio_Player =>
Widget.Audio.Visible (Value => Visible);
when Background_Text =>
Widget.Background.Visible (Value => Visible);
when Button =>
Widget.Switch.Visible (Value => Visible);
when Check_Box =>
Widget.Check.Visible (Value => Visible);
Widget.Check_Label.Visible (Value => Visible);
when Graphic_Area =>
Widget.Canvas.Visible (Value => Visible);
when Image =>
Widget.Img.Visible (Value => Visible);
when Password_Box =>
Widget.Password.Visible (Value => Visible);
Widget.Password_Label.Visible (Value => Visible);
when Progress_Bar =>
Widget.Progress.Visible (Value => Visible);
when Radio_Buttons =>
All_Buttons : for I in Widget.Radio'Range loop
Widget.Radio (I).Button.Visible (Value => Visible);
Widget.Radio (I).Label.Visible (Value => Visible);
end loop All_Buttons;
when Selection_List =>
Widget.Selector.Visible (Value => Visible);
when Text_Area =>
Widget.Area.Visible (Value => Visible);
when Text_Box =>
Widget.Box.Visible (Value => Visible);
Widget.Box_Label.Visible (Value => Visible);
end case;
end Set_Visibility;
procedure Log (Message : in String) renames Gnoga.Log;
package body Dialogs is separate;
protected body Dialog_Control is
procedure Set_Ongoing (Value : in Boolean) is
-- Empty
begin -- Set_Ongoing
In_Progress := Value;
end Set_Ongoing;
function Ongoing return Boolean is (In_Progress);
entry Block when not In_Progress is
-- Empty
begin -- Block
null;
end Block;
end Dialog_Control;
procedure Set_Source (ID : in Widget_ID; Source : in String) is
Widget : Widget_Info := Widget_List.Element (ID.Value);
begin -- Set_Source
if ID.Kind = Audio_Player then
Widget.Audio.Media_Source (Source => Source);
else
Widget.Img.URL_Source (Value => Source);
end if;
end Set_Source;
function Source (ID : Widget_ID) return String is
Widget : constant Widget_Info := Widget_List.Element (ID.Value);
begin -- Source
return Widget.Audio.Media_Source;
end Source;
function Ready (ID : Widget_ID) return Boolean is
Widget : constant Widget_Info := Widget_List.Element (ID.Value);
begin -- Ready
return Widget.Audio.Ready_To_Play;
end Ready;
function Loaded (ID : Widget_ID) return Boolean is
Widget : constant Widget_Info := Widget_List.Element (ID.Value);
begin -- Loaded
return Widget.Img.all.Property ("complete");
end Loaded;
procedure Play (ID : in Widget_ID) is
Widget : Widget_Info := Widget_List.Element (ID.Value);
begin -- Play
Widget.Audio.Play;
end Play;
procedure Pause (ID : in Widget_ID) is
Widget : Widget_Info := Widget_List.Element (ID.Value);
begin -- Pause
Widget.Audio.Pause;
end Pause;
function Paused (ID : Widget_ID) return Boolean is
Widget : constant Widget_Info := Widget_List.Element (ID.Value);
begin -- Paused
return Widget.Audio.Paused;
end Paused;
function Playback_Ended (ID : Widget_ID) return Boolean is
Widget : constant Widget_Info := Widget_List.Element (ID.Value);
begin -- Playback_Ended
return Widget.Audio.Playback_Ended;
end Playback_Ended;
function Length (ID : Widget_ID) return Float is
Widget : constant Widget_Info := Widget_List.Element (ID.Value);
begin -- Length
return Widget.Audio.Media_Duration;
end Length;
procedure Set_Position (ID : in Widget_ID; Position : in Float) is
Widget : Widget_Info := Widget_List.Element (ID.Value);
begin -- Set_Position
Widget.Audio.Media_Position (Seconds => Position);
end Set_Position;
function Position (ID : Widget_ID) return Float is
Widget : constant Widget_Info := Widget_List.Element (ID.Value);
begin -- Position
return Widget.Audio.Media_Position;
end Position;
procedure Set_Text (ID : in Widget_ID; Text : in String) is
Widget : Widget_Info := Widget_List.Element (ID.Value);
begin -- Set_Text
case Widget.Kind is
when Background_Text =>
Widget.Background.Inner_HTML (Value => Text);
when Button =>
Widget.Switch.Inner_HTML (Value => Text);
when Password_Box =>
Widget.Password.Value (Value => Text);
when Text_Area =>
Widget.Area.Inner_HTML (Value => Text);
when Text_Box =>
Widget.Box.Value (Value => Text);
when others =>
raise Program_Error;
end case;
end Set_Text;
procedure Set_Text_Alignment (ID : in Widget_ID; Alignment : in Alignment_ID) is
Widget : Widget_Info := Widget_List.Element (ID.Value);
begin -- Set_Text_Alignment
case Widget.Kind is
when Background_Text =>
Widget.Background.Text_Alignment (Value => Converted (Alignment) );
when Button =>
Widget.Switch.Text_Alignment (Value => Converted (Alignment) );
when Password_Box =>
Widget.Password.Text_Alignment (Value => Converted (Alignment) );
when Selection_List =>
Widget.Selector.Text_Alignment (Value => Converted (Alignment) );
when Text_Area =>
Widget.Area.Text_Alignment (Value => Converted (Alignment) );
when Text_Box =>
Widget.Box.Text_Alignment (Value => Converted (Alignment) );
when others =>
raise Program_Error;
end case;
end Set_Text_Alignment;
procedure Set_Text_Font_Kind (ID : in Widget_ID; Kind : in Font_Kind_ID) is
function Family return String is
(if Kind = Proportional then "sans-serif" else "monospace");
Widget : Widget_Info := Widget_List.Element (ID.Value);
begin -- Set_Text_Font_Kind
case Widget.Kind is
when Background_Text =>
Widget.Background.Font (Family => Family);
when Button =>
Widget.Switch.Font (Family => Family);
when Password_Box =>
Widget.Password.Font (Family => Family);
when Selection_List =>
Widget.Selector.Font (Family => Family);
when Text_Area =>
Widget.Area.Font (Family => Family);
when Text_Box =>
Widget.Box.Font (Family => Family);
when others =>
raise Program_Error;
end case;
end Set_Text_Font_Kind;
procedure Set_Label (ID : in Widget_ID; Text : in String) is
Widget : constant Widget_Info := Widget_List.Element (ID.Value);
begin -- Set_Label
case Widget.Kind is
when Check_Box =>
Widget.Check_Label.Inner_HTML (Value => Text);
when Password_Box =>
Widget.Password_Label.Inner_HTML (Value => Text);
when Text_Box =>
Widget.Box_Label.Inner_HTML (Value => Text);
when others =>
raise Program_Error;
end case;
end Set_Label;
procedure Set_Read_Only (ID : in Widget_ID; Read_Only : in Boolean := True) is
Widget : constant Widget_Info := Widget_List.Element (ID.Value);
begin -- Set_Read_Only
case Widget.Kind is
when Text_Area =>
Widget.Area.Read_Only (Value => Read_Only);
when Text_Box =>
Widget.Box.Read_Only (Value => Read_Only);
when others =>
raise Program_Error;
end case;
end Set_Read_Only;
function Multiple_Select (ID : Widget_ID) return Boolean is (Widget_List.Element (ID.Value).Multi);
function Text (ID : Widget_ID) return String is
Widget : constant Widget_Info := Widget_List.Element (ID.Value);
begin -- Text
case Widget.Kind is
when Background_Text =>
return Widget.Background.Text;
when Button =>
return Widget.Switch.Text;
when Password_Box =>
return Widget.Password.Value;
when Selection_List =>
return Widget.Selector.Value;
when Text_Area =>
return Widget.Area.Value;
when Text_Box =>
return Widget.Box.Value;
when others =>
raise Program_Error;
end case;
end Text;
procedure Set_Active (ID : in Widget_ID; Active : in Boolean) is
Widget : Widget_Info := Widget_List.Element (ID.Value);
begin -- Set_Active
Widget.Check.Checked (Value => Active);
end Set_Active;
function Active (ID : Widget_ID) return Boolean is
Widget : constant Widget_Info := Widget_List.Element (ID.Value);
begin -- Active
return Widget.Check.Checked;
end Active;
function AG_Color (Color : Gnoga.RGBA_Type) return Color_Info is
(Red => RGB_Value (Color.Red),
Green => RGB_Value (Color.Green),
Blue => RGB_Value (Color.Blue),
Alpha => Alpha_Value (Color.Alpha) );
function To_Color (Color : Color_ID) return Color_Info is
(AG_Color (Gnoga.Colors.To_RGBA (Gnoga.Colors.Color_Enumeration'Val (Color_ID'Pos (Color) ) ) ) );
function Gnoga_Color (Color : Color_Info) return Gnoga.RGBA_Type is
(Red => Gnoga.Color_Type (Color.Red),
Green => Gnoga.Color_Type (Color.Green),
Blue => Gnoga.Color_Type (Color.Blue),
Alpha => Gnoga.Alpha_Type (Color.Alpha) );
function To_ID (Color : Color_Info) return Color_ID is
(Color_ID'Val (Gnoga.Colors.Color_Enumeration'Pos (Gnoga.Colors.To_Color_Enumeration (Gnoga_Color (Color) ) ) ) );
function Gnoga_Pixel (Color : Color_Info) return Gnoga.Pixel_Type is
(Red => Gnoga.Color_Type (Color.Red),
Green => Gnoga.Color_Type (Color.Green),
Blue => Gnoga.Color_Type (Color.Blue),
Alpha => Gnoga.Color_Type (255.0 * Color.Alpha) );
procedure Set_Background_Color (Color : in Color_Info) is
-- Empty
begin -- Set_Background_Color
View.Background_Color (RGBA => Gnoga_Color (Color) );
All_Rows : for Row in Form'Range (1) loop
All_Columns : for Column in Form'Range (2) loop
if Valid (Row) (Column) then
Form (Row, Column).Background_Color (RGBA => Gnoga_Color (Color) );
end if;
end loop All_Columns;
end loop All_Rows;
end Set_Background_Color;
procedure Set_Background_Color (ID : Widget_ID; Color : in Color_Info := To_Color (Black) ) is
Widget : Widget_Info := Widget_List.Element (ID.Value);
begin -- Set_Background_Color
case Widget.Kind is
when Audio_Player =>
Widget.Audio.Background_Color (RGBA => Gnoga_Color (Color) );
when Background_Text =>
Widget.Background.Background_Color (RGBA => Gnoga_Color (Color) );
when Button =>
Widget.Switch.Background_Color (RGBA => Gnoga_Color (Color) );
when Check_Box =>
Widget.Check.Background_Color (RGBA => Gnoga_Color (Color) );
Widget.Check_Label.Background_Color (RGBA => Gnoga_Color (Color) );
when Graphic_Area =>
Widget.Canvas.Background_Color (RGBA => Gnoga_Color (Color) );
when Image =>
Widget.Img.Background_Color (RGBA => Gnoga_Color (Color) );
when Password_Box =>
Widget.Password.Background_Color (RGBA => Gnoga_Color (Color) );
Widget.Password_Label.Background_Color (RGBA => Gnoga_Color (Color) );
when Progress_Bar =>
Widget.Progress.Background_Color (RGBA => Gnoga_Color (Color) );
when Radio_Buttons =>
All_Buttons : for I in Widget.Radio'Range loop
Widget.Radio (I).Button.Background_Color (RGBA => Gnoga_Color (Color) );
Widget.Radio (I).Label.Background_Color (RGBA => Gnoga_Color (Color) );
end loop All_Buttons;
when Selection_List =>
Widget.Selector.Background_Color (RGBA => Gnoga_Color (Color) );
when Text_Area =>
Widget.Area.Background_Color (RGBA => Gnoga_Color (Color) );
when Text_Box =>
Widget.Box.Background_Color (RGBA => Gnoga_Color (Color) );
Widget.Box_Label.Background_Color (RGBA => Gnoga_Color (Color) );
end case;
end Set_Background_Color;
procedure Set_Foreground_Color (ID : Widget_ID; Color : in Color_Info := To_Color (Black) ) is
Widget : Widget_Info := Widget_List.Element (ID.Value);
begin -- Set_Foreground_Color
case Widget.Kind is
when Audio_Player =>
Widget.Audio.Color (RGBA => Gnoga_Color (Color) );
when Background_Text =>
Widget.Background.Color (RGBA => Gnoga_Color (Color) );
when Button =>
Widget.Switch.Color (RGBA => Gnoga_Color (Color) );
when Check_Box =>
Widget.Check.Color (RGBA => Gnoga_Color (Color) );
Widget.Check_Label.Color (RGBA => Gnoga_Color (Color) );
when Graphic_Area =>
Widget.Canvas.Color (RGBA => Gnoga_Color (Color) );
when Image =>
Widget.Img.Color (RGBA => Gnoga_Color (Color) );
when Password_Box =>
Widget.Password.Color (RGBA => Gnoga_Color (Color) );
Widget.Password_Label.Color (RGBA => Gnoga_Color (Color) );
when Progress_Bar =>
Widget.Progress.Color (RGBA => Gnoga_Color (Color) );
when Radio_Buttons =>
All_Buttons : for I in Widget.Radio'Range loop
Widget.Radio (I).Button.Color (RGBA => Gnoga_Color (Color) );
Widget.Radio (I).Label.Color (RGBA => Gnoga_Color (Color) );
end loop All_Buttons;
when Selection_List =>
Widget.Selector.Color (RGBA => Gnoga_Color (Color) );
when Text_Area =>
Widget.Area.Color (RGBA => Gnoga_Color (Color) );
when Text_Box =>
Widget.Box.Color (RGBA => Gnoga_Color (Color) );
Widget.Box_Label.Color (RGBA => Gnoga_Color (Color) );
end case;
end Set_Foreground_Color;
procedure Set_Size (ID: in Widget_ID; Width : in Natural; Height : in Natural) is
Widget : Widget_Info := Widget_List.Element (ID.Value);
begin -- Set_Size
if ID.Kind = Image then
Widget.Img.Width (Value => Width);
Widget.Img.Height (Value => Height);
else
Widget.Width := Width;
Widget.Height := Height;
Widget.Canvas.Width (Value => Width);
Widget.Canvas.Height (Value => Height);
Widget_List.Replace_Element (Index => ID.Value, New_Item => Widget);
end if;
end Set_Size;
function Width (ID : in Widget_ID) return Natural is
Widget : constant Widget_Info := Widget_List.Element (ID.Value);
begin -- Width
if ID.Kind = Image then
return Widget.Img.Width;
end if;
return Widget.Width;
end Width;
function Height (ID : in Widget_ID) return Natural is
Widget : constant Widget_Info := Widget_List.Element (ID.Value);
begin -- Height
if ID.Kind = Image then
return Widget.Img.Height;
end if;
return Widget.Height;
end Height;
procedure Set_Pixel (ID : in Widget_ID; X : in Integer; Y : in Integer; Color : in Color_Info := To_Color (Black) ) is
G_Color : constant Gnoga.Pixel_Type := Gnoga_Pixel (Color);
Widget : Widget_Info := Widget_List.Element (ID.Value);
begin -- Set_Pixel
Widget.Context.Pixel (X => X, Y => Y, Color => G_Color);
end Set_Pixel;
function AG_Color (Color : Gnoga.Pixel_Type) return Color_Info is
(Red => RGB_Value (Color.Red),
Green => RGB_Value (Color.Green),
Blue => RGB_Value (Color.Blue),
Alpha => Float (Color.Alpha) / 255.0);
function Pixel (ID : Widget_ID; X : Integer; Y : Integer) return Color_Info is
Widget : constant Widget_Info := Widget_List.Element (ID.Value);
G_Color : Gnoga.Pixel_Type;
begin -- Pixel_Type
G_Color := Widget.Context.Pixel (X, Y);
return AG_Color (G_Color);
end Pixel;
procedure Draw_Line (ID : in Widget_ID;
From_X : in Integer;
From_Y : in Integer;
To_X : in Integer;
To_Y : in Integer;
Width : in Positive := 1;
Color : in Color_Info := To_Color (Black);
Style : in Line_Style_ID := Normal)
is
G_Color : constant Gnoga.RGBA_Type := Gnoga_Color (Color);
Widget : Widget_Info := Widget_List.Element (ID.Value);
begin -- Draw_Line
Widget.Context.Stroke_Color (Value => G_Color);
Widget.Context.Line_Width (Value => Width);
Widget.Context.Set_Line_Dash (Dash_List => (case Style is
when Normal =>
Gnoga.Gui.Element.Canvas.Context_2D.Empty_Dash_List,
when Dashed =>
Gnoga.Gui.Element.Canvas.Context_2D.Dashed_Dash_List,
when Dotted =>
Gnoga.Gui.Element.Canvas.Context_2D.Dotted_Dash_List,
when Dot_Dash =>
Gnoga.Gui.Element.Canvas.Context_2D.Center_Dash_List) );
Widget.Context.Begin_Path;
Widget.Context.Move_To (X => From_X, Y => From_Y);
Widget.Context.Line_To (X => To_X, Y => To_Y);
Widget.Context.Stroke;
end Draw_Line;
procedure Draw_Rectangle (ID : in Widget_ID;
From_X : in Integer;
From_Y : in Integer;
To_X : in Integer;
To_Y : in Integer;
Line_Color : in Optional_Color := (None => False, Color => To_Color (Black) );
Fill_Color : in Optional_Color := (None => True) )
is
Widget : Widget_Info := Widget_List.Element (ID.Value);
begin -- Draw_Rectangle
Widget.Context.Line_Width (Value => 1);
Widget.Context.Begin_Path;
Widget.Context.Rectangle (Rectangle => (X => Integer'Min (From_X, To_X),
Y => Integer'Min (From_Y, To_Y),
Width => abs (From_X - To_X) + 1,
Height => abs (From_Y - To_Y) + 1) );
if not Fill_Color.None then
Convert_Fill : declare
F_Color : constant Gnoga.RGBA_Type := Gnoga_Color (Fill_Color.Color);
begin -- Convert_Fill
Widget.Context.Fill_Color (Value => F_Color);
Widget.Context.Fill;
end Convert_Fill;
end if;
if not Line_Color.None then
Convert_Line : declare
L_Color : constant Gnoga.RGBA_Type := Gnoga_Color (Line_Color.Color);
begin -- Convert_Line
Widget.Context.Stroke_Color (Value => L_Color);
Widget.Context.Stroke;
end Convert_Line;
end if;
end Draw_Rectangle;
procedure Draw_Arc (ID : in Widget_ID;
X : in Integer;
Y : in Integer;
Radius : in Positive;
Start : in Float;
Stop : in Float;
Counter_Clockwise : in Boolean := False;
Line_Color : in Optional_Color := (None => False, Color => To_Color (Black) );
Fill_Color : in Optional_Color := (None => True) )
is
Widget : Widget_Info := Widget_List.Element (ID.Value);
begin -- Draw_Arc
Widget.Context.Line_Width (Value => 1);
Widget.Context.Begin_Path;
if not Fill_Color.None then