1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
|
unit Unit1;
{$mode objfpc}{$H+}
interface
uses
Classes, SysUtils, FileUtil, TAGraph, TASeries, TASources, Forms, Controls,
Graphics, Dialogs, population, TACustomSource, TATransformations, TAChartAxisUtils;
type
{ TForm1 }
TForm1 = class(TForm)
Chart1: TChart;
LeftAxisTransformations: TChartAxisTransformations;
LeftAxisAutoScaleTransform: TAutoScaleAxisTransform;
RightAxisTransformations: TChartAxisTransformations;
LineSeries_male: TLineSeries;
LineSeries_female: TLineSeries;
LineSeries_ratio: TLineSeries;
ChartSource_male: TUserDefinedChartSource;
ChartSource_female: TUserDefinedChartSource;
ChartSource_ratio: TUserDefinedChartSource;
RightAxisAutoScaleTransform: TAutoScaleAxisTransform;
procedure Chart1AxisList0MarkToText(var AText: String; AMark: Double);
procedure ChartSourceGetChartDataItem(
ASource: TUserDefinedChartSource; AIndex: Integer;
var AItem: TChartDataItem);
procedure FormCreate(Sender: TObject);
private
{ private declarations }
PopulationData: TPopulationArray;
public
{ public declarations }
end;
var
Form1: TForm1;
implementation
{$R *.lfm}
const
POPULATION_FILE = 'population.txt';
{ TForm1 }
procedure TForm1.ChartSourceGetChartDataItem(
ASource: TUserDefinedChartSource; AIndex: Integer; var AItem: TChartDataItem);
begin
AItem.X := PopulationData[AIndex].Age;
if ASource = ChartSource_male then
AItem.Y := PopulationData[AIndex].Male / 1e6
else if ASource = ChartSource_female then
AItem.Y := PopulationData[AIndex].Female / 1e6
else
AItem.Y := PopulationData[AIndex].Ratio / 100;
end;
procedure TForm1.Chart1AxisList0MarkToText(var AText: String; AMark: Double);
begin
AText := Format('%s M', [AText]);
end;
procedure TForm1.FormCreate(Sender: TObject);
begin
LoadPopulationData(POPULATION_FILE, PopulationData);
ChartSource_male.PointsNumber := Length(PopulationData);
ChartSource_female.PointsNumber := Length(PopulationData);
ChartSource_ratio.PointsNumber := Length(PopulationData);
end;
end.
|
