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|
-----------------------------------------------------------------------
-- GtkAda - Ada95 binding for the Gimp Toolkit --
-- --
-- Copyright (C) 1998-1999 --
-- Emmanuel Briot, Joel Brobecker and Arnaud Charlet --
-- Copyright (C) 2010-2013, AdaCore --
-- --
-- This library 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 library 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 library; if not, write to the --
-- Free Software Foundation, Inc., 59 Temple Place - Suite 330, --
-- Boston, MA 02111-1307, USA. --
-- --
-----------------------------------------------------------------------
with Glib; use Glib;
with Gtk; use Gtk;
with Gtk.Adjustment; use Gtk.Adjustment;
with Gtk.Box; use Gtk.Box;
with Gtk.Enums; use Gtk.Enums;
with Gtk.Label; use Gtk.Label;
with Gtk.Scale; use Gtk.Scale;
with Gtk.Scale_Button; use Gtk.Scale_Button;
with Gtk.Scrollbar; use Gtk.Scrollbar;
with Gtk.Volume_Button; use Gtk.Volume_Button;
with Gtkada.Types; use Gtkada.Types;
package body Create_Range is
----------
-- Help --
----------
function Help return String is
begin
return "A @bGtk_Range@B is a simple way to select a value in a"
& " specific interval. Although less precise than a "
& "@bGtk_Spin_Button@B, it is much faster to use."
& ASCII.LF
& "A @bGtk_Scrollbar@B (seen below the range) can also be used as a"
& " @bGtk_Range@B, although it does not display its value and relies"
& " on another widget to do so."
& ASCII.LF
& "Note that this demo does not require any explicit callback to be"
& " set to connect the two widgets. In fact, they both use the same"
& " @bGtk_Adjustment@B for their value. Thus, when you modify one of"
& " the widget, it modifies its value in the adjustment, which is then"
& " reflected in the other widget."
& ASCII.LF
& "As you can see, the @bGtk_Scrollbar@B update its value as soon as"
& " it is moved, whereas the @bGtk_Range@B only update its value when"
& " the user releases the mouse button.";
end Help;
---------
-- Run --
---------
procedure Run (Frame : access Gtk.Frame.Gtk_Frame_Record'Class) is
Box1 : Gtk_Box;
Box2 : Gtk_Box;
Adjustment : Gtk_Adjustment;
Scale : Gtk_Scale;
Scrollbar : Gtk_Scrollbar;
Box3 : Gtk_Box;
Label : Gtk_Label;
Scale_Button : Gtk_Scale_Button;
Vol_Button : Gtk_Volume_Button;
begin
Set_Label (Frame, "Range");
Gtk_New_Vbox (Box1, False, 0);
Add (Frame, Box1);
Gtk_New_Vbox (Box2, False, 10);
Set_Border_Width (Box2, 10);
Pack_Start (Box1, Box2, False, False, 0);
Gtk_New (Adjustment, 0.0, 0.0, 101.0, 0.1, 1.0, 1.0);
Gtk_New_Hscale (Scale, Adjustment);
Set_USize (Scale, 150, 80);
Set_Update_Policy (Scale, Update_Delayed);
Set_Digits (Scale, 1);
Set_Draw_Value (Scale, True);
Set_Value_Pos (Scale, Pos_Bottom);
Pack_Start (Box2, Scale, True, True, 0);
for I in 0 .. 10 loop
Add_Mark (Scale, Gdouble (I) * 10.0, Pos_Top, I'Img);
end loop;
Gtk_New_Hscrollbar (Scrollbar, Adjustment);
Set_Update_Policy (Scrollbar, Update_Continuous);
Pack_Start (Box2, Scrollbar, True, True, 0);
Gtk_New_Hbox (Box3, False, 10);
Pack_Start (Box2, Box3, True, True, 0);
Gtk_New (Label, "Scale button:");
Pack_Start (Box3, Label, False, False, 0);
Scale_Button := Gtk_New (Icon_Size_Button, 0.0, 100.0, 2.0, Null_Array);
Pack_Start (Box3, Scale_Button, False, False, 0);
Gtk_New (Label, "Volume button:");
Pack_Start (Box3, Label, False, False, 0);
Gtk_New (Vol_Button);
Pack_Start (Box3, Vol_Button, False, False, 0);
Show_All (Frame);
end Run;
end Create_Range;
|
