用于更改甘特图中子任务的颜色的代码 [英] Code for changing the color of subtasks in Gantt Chart

问题描述

我需要在甘特图 。我的示例基于 GanttDemo2 与以下数据集和渲染器。在不同的论坛中，我发现了一些与这个主题相关的讨论，但我没有找到一个明确的简单工作例子。特别是，我可以改变任务的颜色，但我不知道如何提取子任务。

  private IntervalCategoryDataset createSampleDataset ）{
 
 final TaskSeries s1 = new TaskSeries（Scheduled）; 
 
 final任务t1 = new任务（
Design，date（1，Calendar.APRIL，2001），date（1，Calendar.MAY，2001））; 
 t1.addSubtask（new Task（Design 1，date（1，Calendar.APRIL，2001），date（15，Calendar.APRIL，2001）））; 
 t1.addSubtask（new Task（Design 2，date（16，Calendar.APRIL，2001），date（25，Calendar.APRIL，2001） 
 t1.addSubtask（new Task（Design 3，date（26，Calendar.APRIL，2001），date（1，Calendar.MAY，2001）））; 
 s1.add（t1）; 
 
 final任务t2 =新任务（
Proposal，date（1，Calendar.JUNE，2001），date（1，Calendar.JULY，2001） 
 t2.addSubtask（new Task（Proposal 1，date（1，Calendar.JUNE，2001），date（15，Calendar.JUNE，2001）））; 
 t2.addSubtask（new Task（Proposal 2，date（16，Calendar.JUNE，2001），date（25，Calendar.JUNE，2001） 
 t2.addSubtask（new Task（Proposal 3，date（26，Calendar.JUNE，2001），date（1，Calendar.JULY，2001）））; 
 s1.add（t2）; 
 
 final TaskSeriesCollection collection = new TaskSeriesCollection（）; 
 collection.add（s1）; 
 return collection; 
} 
 
 class MyRenderer extends GanttRenderer {
 
 private static final Color Subask1Color = Color.blue; 
 private static final Color subtask2Color = Color.cyan; 
 private static final Color subtask3Color = Color.green; 
 private static final long serialVersionUID = 1L; 
 
 public MyRenderer（）{
 super（）; 
} 
 
 @Override 
 public Paint getItemPaint（int row，int col）{
 System.out.println（row ++ col + super.getItemPaint（row，col））; 
 if（row == 0）{
 return subtask1Color; 
} else if（row == 1）{
 return subtask2Color; 
} else if（row == 2）{
 return subtask3Color; 
} else {
 return super.getItemPaint（row，col）; 
} 
} 
} 
  

解决方案>

如此处所示，自定义渲染器可以查询模型以对由 getItemPaint（） 。在本示例中，使用给定系列的默认颜色的变化饱和度的调色板来渲染子任务。该方法假定渲染器进行两次通过;应该注意记录依赖性。

  / ** @see http://stackoverflow.com/questions/8938690 * / 
 private static class MyRenderer extends GanttRenderer {
 
 private static final int PASS = 2; //假设两遍
 private final List< Color> clut = new ArrayList< Color>（）; 
 private final TaskSeriesCollection模型; 
 private int row; 
 private int col 
 private int index; 
 
 public MyRenderer（TaskSeriesCollection model）{
 this.model = model; 
} 
 
 @Override 
 public Paint getItemPaint（int row，int col）{
 if（clut.isEmpty（）|| this.row！ | this.col！= col）{
 initClut（row，col）; 
 this.row = row; 
 this.col = col; 
 index = 0; 
} 
 int clutIndex = index ++ / PASS; 
 return clut.get（clutIndex）; 
} 
 
 private void initClut（int row，int col）{
 clut.clear（）; 
颜色c =（颜色）super.getItemPaint（row，col）; 
 float [] a = new float [3]; 
 Color.RGBtoHSB（c.getRed（），c.getGreen（），c.getBlue（），a）; 
 TaskSeries series =（TaskSeries）model.getRowKeys（）。get（row）; 
 List< Task> tasks = series.getTasks（）; // unchecked 
 int taskCount = tasks.get（col）.getSubtaskCount（）; 
 taskCount = Math.max（1，taskCount）; 
 for（int i = 0; i  clut.add（Color.getHSBColor（a [0]，a [1] / i，a [2]）） 
} 
} 
} 
  

I need to change the color of subtasks in a Gantt chart. My example is based on GanttDemo2 with the following dataset and renderer. In different forums I found some discussions related to this topic, but I did not find a clear simple working example. In particular, I can change the color of tasks, but I don't know how to extract subtasks.

private IntervalCategoryDataset createSampleDataset() {

    final TaskSeries s1 = new TaskSeries("Scheduled");

    final Task t1 = new Task(
        "Design", date(1, Calendar.APRIL, 2001), date(1, Calendar.MAY, 2001));
    t1.addSubtask(new Task("Design 1", date(1, Calendar.APRIL, 2001), date(15, Calendar.APRIL, 2001)));
    t1.addSubtask(new Task("Design 2", date(16, Calendar.APRIL, 2001), date(25, Calendar.APRIL, 2001)));
    t1.addSubtask(new Task("Design 3", date(26, Calendar.APRIL, 2001), date(1, Calendar.MAY, 2001)));
    s1.add(t1);

    final Task t2 = new Task(
        "Proposal", date(1, Calendar.JUNE, 2001), date(1, Calendar.JULY, 2001));
    t2.addSubtask(new Task("Proposal 1", date(1, Calendar.JUNE, 2001), date(15, Calendar.JUNE, 2001)));
    t2.addSubtask(new Task("Proposal 2", date(16, Calendar.JUNE, 2001), date(25, Calendar.JUNE, 2001)));
    t2.addSubtask(new Task("Proposal 3", date(26, Calendar.JUNE, 2001), date(1, Calendar.JULY, 2001)));
    s1.add(t2);

    final TaskSeriesCollection collection = new TaskSeriesCollection();
    collection.add(s1);
    return collection;
}

class MyRenderer extends GanttRenderer {

    private static final Color subtask1Color = Color.blue;
    private static final Color subtask2Color = Color.cyan;
    private static final Color subtask3Color = Color.green;
    private static final long serialVersionUID = 1L;

    public MyRenderer() {
        super();
    }

    @Override
    public Paint getItemPaint(int row, int col) {
        System.out.println(row + " " + col + " " + super.getItemPaint(row, col));
        if (row == 0) {
            return subtask1Color;
        } else if (row == 1) {
            return subtask2Color;
        } else if (row == 2) {
            return subtask3Color;
        } else {
            return super.getItemPaint(row, col);
        }
    }
}

解决方案

As suggested here, a custom renderer can query the model to condition the result returned by getItemPaint(). In this example, subtasks are rendered using a palette of varying saturations of the default color for a given series. The approach assumes that the renderer makes two passes; some care should be given to documenting the dependency.

/** @see http://stackoverflow.com/questions/8938690 */
private static class MyRenderer extends GanttRenderer {

    private static final int PASS = 2; // assumes two passes
    private final List<Color> clut = new ArrayList<Color>();
    private final TaskSeriesCollection model;
    private int row;
    private int col;
    private int index;

    public MyRenderer(TaskSeriesCollection model) {
        this.model = model;
    }

    @Override
    public Paint getItemPaint(int row, int col) {
        if (clut.isEmpty() || this.row != row || this.col != col) {
            initClut(row, col);
            this.row = row;
            this.col = col;
            index = 0;
        }
        int clutIndex = index++ / PASS;
        return clut.get(clutIndex);
    }

    private void initClut(int row, int col) {
        clut.clear();
        Color c = (Color) super.getItemPaint(row, col);
        float[] a = new float[3];
        Color.RGBtoHSB(c.getRed(), c.getGreen(), c.getBlue(), a);
        TaskSeries series = (TaskSeries) model.getRowKeys().get(row);
        List<Task> tasks = series.getTasks(); // unchecked
        int taskCount = tasks.get(col).getSubtaskCount();
        taskCount = Math.max(1, taskCount);
        for (int i = 0; i < taskCount; i++) {
            clut.add(Color.getHSBColor(a[0], a[1] / i, a[2]));
        }
    }
}

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