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Spread.Sheets では、ユーザーがスプレッドシートのデータを視覚化する際にチャートエリアおよびプロットエリアを構成できます。チャートエリアはワークシート上でチャート自体やその要素が表示される領域です。チャートエリアをカスタマイズするには、ChartクラスのchartAreaメソッドを使用できます。
プロットエリアは、チャート内でデータがプロットされる領域です。
各チャートにはデフォルトの境界線がありますが、色、透明度、幅、ダッシュスタイルなどのプロパティを使用して、ご希望の設定やワークシートのテーマに合わせて、デフォルトのチャートエリアの境界線をカスタマイズすることができます。
チャートエリアの境界線をカスタマイズすると
データのグラフィカル表示を強調することにより、美しい外観を実現できます。
ワークシート内のチャートの外観のより高度な制御を実現できます。
プロットされたデータの読みやすさを向上できます。
大きなスプレッドシートで使用されているさまざまな種類のチャートの中から特定のチャートに注意を喚起することができます。
次の図は、さまざまな製品(携帯電話、ラップトップ、タブレットなど)の年間売上高を表すチャートを示します。
次のコードは、チャートエリアにカスタム境界線を追加する方法を示します。
var activeSheet = spread.getActiveSheet();
activeSheet.suspendPaint();
// チャートのデータを準備します。
activeSheet.setValue(0, 1, "2016年");
activeSheet.setValue(0, 2, "2017年");
activeSheet.setValue(0, 3, "2018年");
activeSheet.setValue(1, 0, "携帯電話");
activeSheet.setValue(2, 0, "ラップトップ");
activeSheet.setValue(3, 0, "タブレット");
for (var r = 1; r <= 3; r++)
{
for (var c = 1; c <= 3; c++) {
activeSheet.setValue(r, c, parseInt(Math.random() * 10000));
}
}
// チャートを追加します。
var chart = activeSheet.charts.add('Chart1', GC.Spread.Sheets.Charts.ChartType.columnClustered, 20, 110, 550, 250, "A1:D4");
// チャートエリアを設定します。
var chartArea = chart.chartArea();
chartArea.backColor = "#DBF3FA";
chartArea.backColorTransparency = 0.1;
chartArea.fontSize = 14;
// チャートエリアの境界線スタイルを設定します。
chartArea.border.width = 3;
chartArea.border.dashStyle = 4;
chartArea.border.color = "red";
chartArea.border.transparency = 0.5;
chart.chartArea(chartArea);
// チャートタイトルを設定します。
var title = chart.title();
title.text = "年間売上高";
title.fontFamily = "Cambria";
title.fontSize = 28;
title.color = "#696969";
chart.title(title);