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
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
|
unit Main;
{$mode objfpc}{$H+}
interface
uses
Classes, StdCtrls, ComCtrls, ExtCtrls, Spin, Forms,
TAGraph, TASeries, TACustomSource, TASources, TAMultiSeries, TAChartUtils;
type
TDataForSorting = record
Year: Integer;
CityName: String;
Visitors: Integer;
Color: TChartColor;
end;
{ TForm1 }
TForm1 = class(TForm)
btnSort: TButton;
BubbleSeries: TBubbleSeries;
cbAccDirDerivative: TComboBox;
ccsDerivative: TCalculatedChartSource;
cbCumulative: TCheckBox;
ccsAvg: TCalculatedChartSource;
ccsSum: TCalculatedChartSource;
Chart1: TChart;
Chart1BarSeries1: TBarSeries;
Chart1LineSeries1: TLineSeries;
BubbleChart: TChart;
chDerivativeLineOrig: TLineSeries;
chDerivativeLineDeriv: TLineSeries;
Chart1LineSeries4: TLineSeries;
Chart1LineSeries5: TLineSeries;
Chart2: TChart;
Chart2AreaSeries1: TAreaSeries;
Chart2LineSeries1: TLineSeries;
chDerivative: TChart;
chCalc: TChart;
chCalcLineSeries1: TLineSeries;
chCalcLineSeriesAvg: TLineSeries;
chCalcLineSeriesSum: TLineSeries;
cbAccDirStatistics: TComboBox;
cbSmooth: TCheckBox;
Label1: TLabel;
lblSortInfo: TLabel;
seAccumulationRange: TSpinEdit;
lblAccumulationRange: TLabel;
ListChartSource1: TListChartSource;
lcsDerivative: TListChartSource;
PageControl1: TPageControl;
Panel1: TPanel;
Panel2: TPanel;
rgDataShape: TRadioGroup;
RandomChartSource1: TRandomChartSource;
RandomChartSource2: TRandomChartSource;
SortedChartSource: TSortedChartSource;
Splitter1: TSplitter;
tsSorted: TTabSheet;
tsDerivative: TTabSheet;
tsStatistics: TTabSheet;
tsBasic: TTabSheet;
UserDefinedChartSource: TUserDefinedChartSource;
procedure btnSortClick(Sender: TObject);
procedure BubbleChartAfterPaint({%H-}ASender: TChart);
procedure cbAccDirDerivativeChange(Sender: TObject);
procedure cbAccDirStatisticsChange(Sender: TObject);
procedure cbCumulativeChange(Sender: TObject);
procedure cbSmoothChange(Sender: TObject);
procedure CreateDataForDerivative;
procedure CreateDataForSorting;
procedure seAccumulationRangeChange(Sender: TObject);
procedure FormCreate(Sender: TObject);
procedure rgDataShapeClick(Sender: TObject);
procedure UserDefinedChartSourceGetChartDataItem(
{%H-}ASource: TUserDefinedChartSource; AIndex: Integer;
var AItem: TChartDataItem);
private
FDataForSorting: array of TDataForSorting;
end;
var
Form1: TForm1;
implementation
{$R *.lfm}
uses
Math;
{ TForm1 }
procedure TForm1.cbAccDirDerivativeChange(Sender: TObject);
begin
ccsDerivative.AccumulationDirection :=
TChartAccumulationDirection(cbAccDirDerivative.ItemIndex);
end;
procedure TForm1.btnSortClick(Sender: TObject);
begin
SortedChartSource.Sorted := not SortedChartSource.Sorted;
end;
procedure TForm1.BubbleChartAfterPaint(ASender: TChart);
begin
if SortedChartSource.IsSorted then
lblSortInfo.Caption := 'Sorted by radius (descending)'
else
lblSortInfo.Caption := 'Not sorted';
end;
procedure TForm1.cbAccDirStatisticsChange(Sender: TObject);
begin
ccsAvg.AccumulationDirection :=
TChartAccumulationDirection(cbAccDirStatistics.ItemIndex);
ccsSum.AccumulationDirection := ccsAvg.AccumulationDirection;
end;
procedure TForm1.cbCumulativeChange(Sender: TObject);
begin
chCalcLineSeriesSum.Active := cbCumulative.Checked;
end;
procedure TForm1.cbSmoothChange(Sender: TObject);
begin
if cbSmooth.Checked then
ccsDerivative.AccumulationMethod := camSmoothDerivative
else
ccsDerivative.AccumulationMethod := camDerivative;
end;
procedure TForm1.CreateDataForDerivative;
const
N = 100;
MIN_X = -10;
MAX_X = 10;
EPS = 1e-6;
var
i: Integer;
x, y: Double;
begin
lcsDerivative.Clear;
if rgDataShape.ItemIndex = 6 then
for i := 0 to 9 do
lcsDerivative.Add(i - IfThen(i > 6, 1, 0), i)
else
for i := 0 to N - 1 do begin
x := MIN_X + (MAX_X - MIN_X) / (N - 1) * i;
if SameValue(x, 0.0, EPS) then x := 0;
case rgDataShape.ItemIndex of
0: y := x;
1: y := Sin(x);
2: if x = 0 then y := 1 else y := Sin(x) / x;
3: y := Exp(-x / 3);
4: y := Exp(-Sqr((x - 2.5) / 2.5));
5: y := Exp(-Sqr((x - 2.5) / 2.5)) + 0.05 * (Random - 0.5);
end;
lcsDerivative.Add(x, y);
end;
end;
procedure TForm1.CreateDataForSorting;
procedure AddCity(AYear: Integer; const ACityName: string;
ANumberOfVisitors: Integer; AColor: TChartColor);
begin
SetLength(FDataForSorting, Length(FDataForSorting) + 1);
with FDataForSorting[High(FDataForSorting)] do begin
Year := AYear;
CityName := ACityName;
Visitors := ANumberOfVisitors;
Color := AColor;
end;
end;
begin
SetLength(FDataForSorting, 0);
AddCity(1967, 'City A', 155000, $00FFFF); // yellow
AddCity(1968, 'City B', 30000, $FF0000); // blue
AddCity(1969, 'City C', 450000, $FF00FF); // fuchsia
AddCity(1970, 'City D', 50000, $FFFF00); // aqua
AddCity(1971, 'City E', 80000, $00FF00); // lime
AddCity(1972, 'City F', 615000, $0000FF); // red
UserDefinedChartSource.PointsNumber := Length(FDataForSorting);
{ These settings are made in the Object Inspector for the SortedChartSource:
- Origin = UserDefinedChartSource
- SortBy = sbY
- SortIndex = 1 // --> sort by radius
- SortDir = sdDescending // --> draw large bubbles first
}
end;
procedure TForm1.FormCreate(Sender: TObject);
begin
Randomize;
CreateDataForDerivative;
CreateDataForSorting;
end;
procedure TForm1.rgDataShapeClick(Sender: TObject);
begin
CreateDataForDerivative;
end;
procedure TForm1.UserDefinedChartSourceGetChartDataItem(
ASource: TUserDefinedChartSource; AIndex: Integer; var AItem: TChartDataItem);
begin
AItem.X := FDataForSorting[AIndex].Year;
AItem.Y := 0;
AItem.YList[0] := Sqrt(FDataForSorting[AIndex].Visitors/100000 / PI);
AItem.Text := FDataForSorting[AIndex].CityName;
AItem.Color := FDataForSorting[AIndex].Color;
end;
procedure TForm1.seAccumulationRangeChange(Sender: TObject);
begin
ccsDerivative.AccumulationRange := seAccumulationRange.Value;
end;
end.
|
