/usr/share/doc/libplplot12/examples/ada/xthick12a.adb is in libplplot-ada1-dev 5.10.0+dfsg2-0.1ubuntu2.
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-- Bar chart demo.
-- Copyright (C) 2006 Jerry Bauck
-- This file is part of PLplot.
-- PLplot is free software; you can redistribute it and/or modify
-- it under the terms of the GNU Library General Public License as published
-- by the Free Software Foundation; either version 2 of the License, or
-- (at your option) any later version.
-- PLplot 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 Library General Public License for more details.
-- You should have received a copy of the GNU Library General Public License
-- along with PLplot; if not, write to the Free Software
-- Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
with
Ada.Numerics,
Ada.Numerics.Long_Elementary_Functions,
Ada.Strings,
Ada.Strings.Fixed,
PLplot_Auxiliary,
PLplot;
use
Ada.Numerics,
Ada.Numerics.Long_Elementary_Functions,
Ada.Strings,
Ada.Strings.Fixed,
PLplot_Auxiliary,
PLplot;
------------------------------------------------------------------------------
-- Does a simple bar chart, using color fill. If color fill is
-- unavailable, pattern fill is used instead (automatic).
------------------------------------------------------------------------------
procedure xthick12a is
y0 : Real_Vector (0 .. 9);
pos : Real_Vector (0 .. 4) := (0.0, 0.25, 0.5, 0.75, 1.0);
r : Real_Vector (0 .. 4) := (0.0, 0.25, 0.5, 1.0, 1.0);
g : Real_Vector (0 .. 4) := (1.0, 0.5, 0.5, 0.5, 1.0);
b : Real_Vector (0 .. 4) := (1.0, 1.0, 0.5, 0.25, 0.0);
procedure plfbox (x0, y0 : Long_Float) is
x, y : Real_Vector (0 ..3);
begin
x(0) := x0;
y(0) := 0.0;
x(1) := x0;
y(1) := y0;
x(2) := x0 + 1.0;
y(2) := y0;
x(3) := x0 + 1.0;
y(3) := 0.0;
Fill_Polygon(x, y);
Set_Pen_Color(Red);
Select_Line_Style(1);
Draw_Curve(x, y);
end plfbox;
begin
-- Parse and process command line arguments.
Parse_Command_Line_Arguments(Parse_Full);
-- Initialize plplot.
Initialize_PLplot;
Advance_To_Subpage(Next_Subpage);
Set_Viewport_Standard;
Set_Viewport_World(1980.0, 1990.0, 0.0, 35.0);
Box_Around_Viewport("bc", 1.0, 0, "bcnv", 10.0, 0);
Set_Pen_Color(Yellow);
Write_Labels("Year", "Widget Sales (millions)", "#frPLplot Example 12");
y0(0) := 5.0;
y0(1) := 15.0;
y0(2) := 12.0;
y0(3) := 24.0;
y0(4) := 28.0;
y0(5) := 30.0;
y0(6) := 20.0;
y0(7) := 8.0;
y0(8) := 12.0;
y0(9) := 3.0;
Set_Color_Map_1_Piecewise(RGB, pos, r, g, b, Alt_Hue_Path_None);
for i in y0'range loop
Set_Color_Map_1(Long_Float(i)/9.0);
Select_Fill_Pattern(0);
plfbox((1980.0 + Long_Float(i)), y0(i));
Write_Text_World(1980.0 + Long_Float(i) + 0.5, y0(i) + 1.0, 1.0, 0.0, 0.5, Trim(Integer'image(Integer(y0(i))), Left));
Write_Text_Viewport("b", 1.0, (Long_Float(i) + 1.0) * 0.1 - 0.05, 0.5, Trim(Integer'image(1980 + i), Left));
end loop;
-- Don't forget to call End_PLplot to finish off!
End_PLplot;
end xthick12a;
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