在yAxis上使用TChart,我的数据范围为0到100,000的整数值。我如何格式化TChart上的标签,如果当前系列的范围是10,000-100,000,它在图表上读取为10k,50k,90,100k等。这适用于移动应用程序,所以这样做的目的是节省手机上的空间以最大化图表显示。
使用Delphi Seattle,FMX,为iOS / Android开发
答案 0 :(得分:2)
似乎有很多种可能性,这里有一种使用GetAxisLabel的方法。对我而言,关键是将标签样式设置为talText。
unit Unit1;
interface
uses
System.SysUtils, System.Types, System.UITypes, System.Classes, System.Variants,
FMX.Types, FMX.Controls, FMX.Forms, FMX.Graphics, FMX.Dialogs, FMXTee.Engine,
FMXTee.Series, FMXTee.Procs, FMXTee.Chart;
type
TForm1 = class(TForm)
Chart1: TChart;
procedure Chart1GetAxisLabel(Sender: TChartAxis; Series: TChartSeries;
ValueIndex: Integer; var LabelText: string);
procedure FormCreate(Sender: TObject);
private
{ Private declarations }
fSeries: TPointSeries;
public
{ Public declarations }
end;
var
Form1: TForm1;
implementation
{$R *.fmx}
procedure TForm1.Chart1GetAxisLabel(Sender: TChartAxis; Series: TChartSeries;
ValueIndex: Integer; var LabelText: string);
begin
if (fSeries = Series) then
begin
LabelText := IntToStr(Round(Series.YValue[ValueIndex] / 1000)) + 'K';
end;
end;
procedure TForm1.FormCreate(Sender: TObject);
var
i: NativeInt;
begin
fSeries := TPointSeries.Create(self);
fSeries.ParentChart := Chart1;
for i := 1 to 10 do
begin
fSeries.Add(i * 10000);
end;
Chart1.Axes.Left.LabelStyle := talText;
end;
end.