如何在ChartDirector(Python)中创建多层甘特图

使用ChartDirector的 Python版本-ChartDirector下载来创建出多层级的甘特图，而在此次的示例演示中将会包含两个图层，包含计划和实际情况的甘特图，XYChart.addBoxWhiskerLayer 创建的两个图层，使用BaseBoxLayer.setDataWidth来进行在栏的顶部的图层的宽度的设置，以便它不会挡住底部的图层。

具体示例的源代码如下，和大家一起分享分享：

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#!/usr/bin/python from pychartdir import *   # the names of the tasks labels = ["Market Research", "Define Specifications", "Overall Archiecture",     "Project Planning", "Detail Design", "Software Development", "Test Plan",     "Testing and QA", "User Documentation"]   # the planned start dates and end dates for the tasks startDate = [chartTime(2004, 8, 16), chartTime(2004, 8, 30), chartTime(2004, 9, 13),     chartTime(2004, 9, 20), chartTime(2004, 9, 27), chartTime(2004, 10, 4),     chartTime(2004, 10, 25), chartTime(2004, 11, 1), chartTime(2004, 11, 8)] endDate = [chartTime(2004, 8, 30), chartTime(2004, 9, 13), chartTime(2004, 9, 27),     chartTime(2004, 10, 4), chartTime(2004, 10, 11), chartTime(2004, 11, 8),     chartTime(2004, 11, 8), chartTime(2004, 11, 22), chartTime(2004, 11, 22)]   # the actual start dates and end dates for the tasks up to now actualStartDate = [chartTime(2004, 8, 16), chartTime(2004, 8, 27), chartTime(2004, 9,     9), chartTime(2004, 9, 18), chartTime(2004, 9, 22)] actualEndDate = [chartTime(2004, 8, 27), chartTime(2004, 9, 9), chartTime(2004, 9, 27     ), chartTime(2004, 10, 2), chartTime(2004, 10, 8)]   # Create a XYChart object of size 620 x 280 pixels. Set background color to light # green (ccffcc) with 1 pixel 3D border effect. c = XYChart(620, 280, 0xccffcc, 0x000000, 1)   # Add a title to the chart using 15 points Times Bold Itatic font, with white # (ffffff) text on a dark green (0x6000) background c.addTitle("Multi-Layer Gantt Chart Demo", "timesbi.ttf", 15, 0xffffff     ).setBackground(0x006000)   # Set the plotarea at (140, 55) and of size 460 x 200 pixels. Use alternative # white/grey background. Enable both horizontal and vertical grids by setting their # colors to grey (c0c0c0). Set vertical major grid (represents month boundaries) 2 # pixels in width c.setPlotArea(140, 55, 460, 200, 0xffffff, 0xeeeeee, LineColor, 0xc0c0c0, 0xc0c0c0     ).setGridWidth(2, 1, 1, 1)   # swap the x and y axes to create a horziontal box-whisker chart c.swapXY()   # Set the y-axis scale to be date scale from Aug 16, 2004 to Nov 22, 2004, with ticks # every 7 days (1 week) c.yAxis().setDateScale(chartTime(2004, 8, 16), chartTime(2004, 11, 22), 86400 * 7)   # Add a red (ff0000) dash line to represent the current day c.yAxis().addMark(chartTime(2004, 10, 8), c.dashLineColor(0xff0000, DashLine))   # Set multi-style axis label formatting. Month labels are in Arial Bold font in "mmm # d" format. Weekly labels just show the day of month and use minor tick (by using # '-' as first character of format string). c.yAxis().setMultiFormat(StartOfMonthFilter(), "<*font=arialbd.ttf*>{value|mmm d}",     StartOfDayFilter(), "-{value|d}")   # Set the y-axis to shown on the top (right + swapXY = top) c.setYAxisOnRight()   # Set the labels on the x axis c.xAxis().setLabels(labels)   # Reverse the x-axis scale so that it points downwards. c.xAxis().setReverse()   # Set the horizontal ticks and grid lines to be between the bars c.xAxis().setTickOffset(0.5)   # Use blue (0000aa) as the color for the planned schedule plannedColor = 0x0000aa   # Use a red hash pattern as the color for the actual dates. The pattern is created as # a 4 x 4 bitmap defined in memory as an array of colors. actualColor = c.patternColor([0xffffff, 0xffffff, 0xffffff, 0xff0000, 0xffffff,     0xffffff, 0xff0000, 0xffffff, 0xffffff, 0xff0000, 0xffffff, 0xffffff, 0xff0000,     0xffffff, 0xffffff, 0xffffff], 4)   # Add a box whisker layer to represent the actual dates. We add the actual dates # layer first, so it will be the top layer. actualLayer = c.addBoxLayer(actualStartDate, actualEndDate, actualColor, "Actual")   # Set the bar height to 8 pixels so they will not block the bottom bar actualLayer.setDataWidth(8)   # Add a box-whisker layer to represent the planned schedule date c.addBoxLayer(startDate, endDate, plannedColor, "Planned").setBorderColor(     SameAsMainColor)   # Add a legend box on the top right corner (595, 60) of the plot area with 8 pt Arial # Bold font. Use a semi-transparent grey (80808080) background. b = c.addLegend(595, 60, 0, "arialbd.ttf", 8) b.setAlignment(TopRight) b.setBackground(0x80808080, -1, 2)   # Output the chart c.makeChart("layergantt.png")