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A Donut Chart in a Few Lines
The same API in Delphi, C++ Builder and C#: revenue by region as a donut with an Others slice, on a dark theme, exported to PNG.
Builds the model, a pie series with a 55 percent hole, a VCL view and a renderer that writes a 1200 x 700 PNG.
uses
Controls, sgcUICore_Theme, sgcCharts_Chart, sgcCharts_Series_Pie,
sgcCharts_Renderer, sgcCharts_VCL;
// Revenue by region as a donut chart with an "Others" slice,
// on a dark theme, exported to PNG.
procedure BuildDonut(aOwner: TWinControl);
var
oChart: TsgcChart;
oView: TsgcVCLChart;
oPie: TsgcChartSeries_Pie;
oPNG: TsgcChartRenderer;
begin
oChart := TsgcChart.Create(aOwner);
oChart.Theme := utDark;
oChart.Title.Text := 'Revenue by region';
oChart.Legend.Position := clpRight;
oPie := TsgcChartSeries_Pie.Create(aOwner);
oPie.Chart := oChart;
oPie.InnerRadiusPercent := 55;
oPie.OthersThreshold := 4;
oPie.OthersText := 'Others';
oPie.ExplodeOnClick := True;
oPie.AddItem('North America', 420);
oPie.AddItem('Europe', 310);
oPie.AddItem('Asia Pacific', 280);
oPie.AddItem('Latin America', 95);
oPie.AddItem('Middle East', 12);
oView := TsgcVCLChart.Create(aOwner);
oView.Parent := aOwner;
oView.Align := alClient;
oView.Chart := oChart;
oPNG := TsgcChartRenderer.Create(aOwner);
oPNG.Chart := oChart;
oPNG.RenderToPNGFile('revenue.png', 1200, 700);
end;
ヘルプのトピックを読む →
The same donut in C++ Builder, using the generated sgcCharts_*.hpp headers.
#include <vcl.h>
#include "sgcUICore_Theme.hpp"
#include "sgcCharts_Chart.hpp"
#include "sgcCharts_Series_Pie.hpp"
#include "sgcCharts_Renderer.hpp"
#include "sgcCharts_VCL.hpp"
// Revenue by region as a donut chart with an "Others" slice,
// on a dark theme, exported to PNG.
void BuildDonut(TWinControl *aOwner)
{
TsgcChart *oChart = new TsgcChart(aOwner);
oChart->Theme = utDark;
oChart->Title->Text = "Revenue by region";
oChart->Legend->Position = clpRight;
TsgcChartSeries_Pie *oPie = new TsgcChartSeries_Pie(aOwner);
oPie->Chart = oChart;
oPie->InnerRadiusPercent = 55;
oPie->OthersThreshold = 4;
oPie->OthersText = "Others";
oPie->ExplodeOnClick = true;
oPie->AddItem("North America", 420, 0);
oPie->AddItem("Europe", 310, 0);
oPie->AddItem("Asia Pacific", 280, 0);
oPie->AddItem("Latin America", 95, 0);
oPie->AddItem("Middle East", 12, 0);
TsgcVCLChart *oView = new TsgcVCLChart(aOwner);
oView->Parent = aOwner;
oView->Align = alClient;
oView->Chart = oChart;
TsgcChartRenderer *oPNG = new TsgcChartRenderer(aOwner);
oPNG->Chart = oChart;
oPNG->RenderToPNGFile("revenue.png", 1200, 700);
}
ヘルプのトピックを読む →
Headless in C#: the same model rendered to PNG with no window, from the Rendering package.
using esegece.sgcCharts;
using esegece.sgcUICore;
// Revenue by region as a donut chart with an "Others" slice,
// on a dark theme, rendered headless to PNG (no window needed).
public static class RevenueDonut
{
public static void Render()
{
var oChart = new TsgcChart();
oChart.Theme = TsgcUITheme.utDark;
oChart.Title.Text = "Revenue by region";
oChart.Legend.Position = TsgcChartLegendPosition.clpRight;
var oPie = new TsgcChartSeries_Pie();
oPie.Chart = oChart;
oPie.InnerRadiusPercent = 55;
oPie.OthersThreshold = 4;
oPie.OthersText = "Others";
oPie.ExplodeOnClick = true;
oPie.AddItem("North America", 420);
oPie.AddItem("Europe", 310);
oPie.AddItem("Asia Pacific", 280);
oPie.AddItem("Latin America", 95);
oPie.AddItem("Middle East", 12);
var oPNG = new TsgcChartRenderer();
oPNG.Chart = oChart;
oPNG.RenderToPNGFile("revenue.png", 1200, 700);
}
}
dotnet add package esegece.sgcCharts.Rendering
ヘルプのトピックを読む →
