画一个三角形的形状

Question

我正在尝试在JFreeChart中的GanttRenderer类中绘制三角形。我可以从Shape Utilities获得形状：

Shape triangle = ShapeUtilities.createDownTriangle(4.0f);

如何在正确的位置绘制形状并设置尺寸参数？

public class Renderer extends GanttRenderer {

private final TaskSeriesCollection model;

public Renderer(TaskSeriesCollection model) {
    this.model = model;
}
@Override
protected void drawTasks(Graphics2D g2, CategoryItemRendererState state, Rectangle2D dataArea, CategoryPlot plot, CategoryAxis domainAxis,
        ValueAxis rangeAxis, GanttCategoryDataset dataset, int row, int column) {   

        /*Some other code here*/

            Shape triangle = ShapeUtilities.createDownTriangle(4.0f);
//              Rectangle2D triangleContainer = triangle.getBounds2D();
//              triangleContainer.setRect(subtaskStartTranslated, rectYAxisStart, rectBreadth, rectBreadth);

            g2.setPaint(new Color(255,0,0));
            g2.draw(triangle);

        /*Some other code here*/
    }
}

Answer 1

创建原始形状的平移形状，如下所示：

Shape downTriangle = ShapeUtils.createTranslatedShape(ShapeUtils.createDownTriangle(sizeFactor), sizeFactor, sizeFactor);