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------------------------------------------------------------------------------
-- GtkAda - Ada95 binding for the Gimp Toolkit --
-- --
-- Copyright (C) 2006-2018, AdaCore --
-- --
-- This library is free software; you can redistribute it and/or modify it --
-- under terms of the GNU General Public License as published by the Free --
-- Software Foundation; either version 3, 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 MERCHAN- --
-- TABILITY or FITNESS FOR A PARTICULAR PURPOSE. --
-- --
-- --
-- --
-- --
-- --
-- You should have received a copy of the GNU General Public License and --
-- a copy of the GCC Runtime Library Exception along with this program; --
-- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see --
-- <http://www.gnu.org/licenses/>. --
-- --
------------------------------------------------------------------------------
with Gdk.Color; use Gdk.Color;
with Gdk.Pixbuf; use Gdk.Pixbuf;
with Glib; use Glib;
with Glib.Object; use Glib.Object;
with Gtk.Box; use Gtk.Box;
with Gtk.Frame; use Gtk.Frame;
with Gtk.Cell_Renderer_Pixbuf; use Gtk.Cell_Renderer_Pixbuf;
with Gtk.Cell_Renderer_Text; use Gtk.Cell_Renderer_Text;
with Gtk.Combo_Box_Text; use Gtk.Combo_Box_Text;
with Gtk.Combo_Box; use Gtk.Combo_Box;
with Gtk.Cell_Layout; use Gtk.Cell_Layout;
with Gtk.List_Store; use Gtk.List_Store;
with Gtk.Tooltip; use Gtk.Tooltip;
with Gtk.Tree_Model; use Gtk.Tree_Model;
with Gtk.Widget; use Gtk.Widget;
package body Create_Combo_Box is
Column_0 : constant := 0;
Column_1 : constant := 1;
Column_2 : constant := 2;
-- The columns in the model
procedure Append_Color_Pixbuf
(Model : Gtk_List_Store;
Color : String);
-- Append a new pixbuf with Color as its background
procedure Fill_Pixbuf (Pix : Gdk_Pixbuf; Color : String);
-- Fill the background of Pix. This is probably not some code you should
-- copy in your own application, since not very clean.
procedure Set_Color_Pixbuf
(Model : Gtk_List_Store; Iter : Gtk_Tree_Iter; Color : String);
-- Add a pixbuf to the second column of Model
function On_Query_Tooltip
(Widget : access Gtk_Widget_Record'Class;
X, Y : Gint;
Keyboard_Mode : Boolean;
Tooltip : not null access Glib.Object.GObject_Record'Class)
return Boolean;
-- Compute an item specific tooltip for the first combo box
----------
-- Help --
----------
function Help return String is
begin
return "A @bGtk_Combo_Box@B is a widget that allows the user to choose"
& " from a list of valid choices.";
end Help;
-----------------
-- Fill_Pixbuf --
-----------------
procedure Fill_Pixbuf (Pix : Gdk_Pixbuf; Color : String) is
GColor : Gdk_Color;
Num : Guint;
Pixels : Rgb_Buffer_Access;
begin
GColor := Parse (Color);
-- This code is not clean. It would be better to use cairo, but GtkAda
-- has no binding for it at the time of this writing. You could also
-- load the images from XPM data instead.
Num := Guint (Get_Width (Pix) * Get_Height (Pix));
Pixels := Get_Pixels (Pix);
for N in 0 .. Num - 1 loop
-- By default, each color occupies 8bits, thus is it easier to
-- manipulate colors
Pixels (N).Red := Guchar (Red (GColor) / 65535 * 255);
Pixels (N).Green := Guchar (Green (GColor) / 65535 * 255);
Pixels (N).Blue := Guchar (Blue (GColor) / 65535 * 255);
end loop;
end Fill_Pixbuf;
-------------------------
-- Append_Color_Pixbuf --
-------------------------
procedure Append_Color_Pixbuf
(Model : Gtk_List_Store;
Color : String)
is
Pix : Gdk_Pixbuf;
Iter : Gtk_Tree_Iter;
begin
Pix := Gdk_New (Bits_Per_Sample => 8, Width => 16, Height => 16);
Fill_Pixbuf (Pix, Color);
Append (Model, Iter);
Set (Model, Iter, Column_0, Pix);
Unref (Pix);
end Append_Color_Pixbuf;
----------------------
-- Set_Color_Pixbuf --
----------------------
procedure Set_Color_Pixbuf
(Model : Gtk_List_Store; Iter : Gtk_Tree_Iter; Color : String)
is
Pix : Gdk_Pixbuf;
begin
Pix := Gdk_New (Bits_Per_Sample => 8, Width => 16, Height => 16);
Fill_Pixbuf (Pix, Color);
Set (Model, Iter, Column_1, Pix);
Unref (Pix);
end Set_Color_Pixbuf;
----------------------
-- On_Query_Tooltip --
----------------------
function On_Query_Tooltip
(Widget : access Gtk_Widget_Record'Class;
X, Y : Gint;
Keyboard_Mode : Boolean;
Tooltip : not null access Glib.Object.GObject_Record'Class)
return Boolean
is
pragma Unreferenced (X, Y, Keyboard_Mode);
Combo : constant Gtk_Combo_Box := Gtk_Combo_Box (Widget);
Tip : constant Gtk_Tooltip := Gtk_Tooltip (Tooltip);
begin
Tip.Set_Text ("This is the tooltip for the active item "
& Gint'Image (Combo.Get_Active));
return True; -- display the tooltip
end On_Query_Tooltip;
---------
-- Run --
---------
procedure Run (Frame : access Gtk.Frame.Gtk_Frame_Record'Class) is
Box : Gtk_Box;
Model : Gtk_List_Store;
Iter : Gtk_Tree_Iter;
Combo : Gtk_Combo_Box;
TCombo : Gtk_Combo_Box_Text;
Render : Gtk_Cell_Renderer_Text;
Pix : Gtk_Cell_Renderer_Pixbuf;
begin
Set_Label (Frame, "Combo box");
Gtk_New_Vbox (Box, Homogeneous => False);
Add (Frame, Box);
-- A simple text combo
Gtk_New (TCombo);
Pack_Start (Box, TCombo, Expand => False);
Append_Text (TCombo, "Simple Text Combo 1");
Append_Text (TCombo, "Simple Text Combo 2");
Append_Text (TCombo, "Simple Text Combo 3");
Set_Active (TCombo, 0);
-- Let's make the text of the combo box tooltip depend on which item
-- is selected. Unfortunately, there doesn't seem to be a way to set
-- a tooltip on the popup window itself, since we do not have access
-- to that window.
TCombo.Set_Tooltip_Text ("A general tooltip");
TCombo.On_Query_Tooltip (On_Query_Tooltip'Access);
-- A combo box with an entry, and some additional columns in the
-- popup
Gtk_New (Model, (Column_0 => GType_String, -- text for the entry
Column_1 => GType_String)); -- text for the popup
for Choice in 1 .. 10 loop
Model.Append (Iter);
Set (Model, Iter, Column_0, "Choice" & Integer'Image (Choice));
Set (Model, Iter, Column_1,
"Some explanation on choice" & Integer'Image (Choice));
end loop;
Gtk_New_With_Model_And_Entry (Combo, +Model);
Box.Pack_Start (Combo, Expand => False);
Gtk_New (Render);
Pack_Start (+Combo, Render, Expand => True);
Add_Attribute (+Combo, Render, "markup", Column_1);
Combo.Set_Entry_Text_Column (Column_0); -- before Set_Active
Combo.Set_Active (0);
-- A slightly different combo box, where the items are on multiple
-- lines. This doesn't quite replace a tooltip, but might be useful
-- anyway
Gtk_New (Model, (Column_0 => GType_String, -- text for the entry
Column_1 => GType_String)); -- text for the popup
for Choice in 1 .. 10 loop
Model.Append (Iter);
Set (Model, Iter, Column_0, "Choice" & Integer'Image (Choice));
Set (Model, Iter, Column_1,
"Choice" & Integer'Image (Choice) & ASCII.LF &
"<small>Some explanation on choice" & Integer'Image (Choice)
& "</small>");
end loop;
Gtk_New_With_Model (Combo, +Model);
Box.Pack_Start (Combo, Expand => False);
Gtk_New (Render);
Pack_Start (+Combo, Render, Expand => True);
Add_Attribute (+Combo, Render, "markup", Column_1);
Combo.Set_Active (0);
-- Create a model. This is a set of rows, each with two columns in this
-- specific case.
Gtk_New (Model, (Column_0 => GType_String,
Column_1 => Gdk.Pixbuf.Get_Type,
Column_2 => GType_Boolean));
Append (Model, Iter);
Set (Model, Iter, Column_0, "Combo From Model 1");
Set_Color_Pixbuf (Model, Iter, "red");
Set (Model, Iter, Column_2, True);
Append (Model, Iter);
Set (Model, Iter, Column_0, "Combo From Model 2");
Set_Color_Pixbuf (Model, Iter, "green");
Set (Model, Iter, Column_2, False); -- Row 2 will be insensitive
Append (Model, Iter);
Set (Model, Iter, Column_0, "Combo From Model 3");
Set_Color_Pixbuf (Model, Iter, "blue");
Set (Model, Iter, Column_2, True);
-- Create the combo. We use both columns of the model to display in the
-- model, but we could display only one, or even have a display that
-- doesn't come directly from a column (see create_cell_view for
-- instance)
Gtk_New_With_Model (Combo, +Model);
Pack_Start (Box, Combo, Expand => False);
Gtk_New (Pix);
Pack_Start (+Combo, Pix, Expand => True);
Add_Attribute (+Combo, Pix, "pixbuf", Column_1);
Add_Attribute (+Combo, Pix, "sensitive", Column_2);
Gtk_New (Render);
Pack_Start (+Combo, Render, Expand => True);
Add_Attribute (+Combo, Render, "text", Column_0);
Add_Attribute (+Combo, Render, "sensitive", Column_2);
Set_Active (Combo, 0);
-- A matrix combo now
Gtk_New (Model, (Column_0 => Gdk.Pixbuf.Get_Type));
Append_Color_Pixbuf (Model, "red");
Append_Color_Pixbuf (Model, "green");
Append_Color_Pixbuf (Model, "blue");
Append_Color_Pixbuf (Model, "yellow");
Append_Color_Pixbuf (Model, "black");
Append_Color_Pixbuf (Model, "white");
Append_Color_Pixbuf (Model, "cyan");
Append_Color_Pixbuf (Model, "pink");
Append_Color_Pixbuf (Model, "magenta");
Gtk_New_With_Model (Combo, +Model);
Pack_Start (Box, Combo, Expand => False);
Set_Wrap_Width (Combo, 3); -- Make it a matrix
Gtk_New (Pix);
Pack_Start (+Combo, Pix, Expand => True);
Add_Attribute (+Combo, Pix, "pixbuf", Column_0);
Set_Active (Combo, 0);
Show_All (Frame);
end Run;
end Create_Combo_Box;
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