C1GanttView draws progress lines from the given fixed status date of your project that connect progress tasks and tasks that should have started. Progress lines are vertical lines on the timescale used to visually represent the progress of your project. The lines spike out to the left and right. The left spike indicates the work is behind schedule and the right spike indicates the work is ahead of schedule. The spike connects to the point on the taskbar that represents the task’s percentage complete for its duration. In other words, if the task is 50% complete, the spike from the progress line connects to the middle of the taskbar. C1GanttView supports one progress line at a time. The progress line is drawn at the value of the StatusDate property.

Progress lines appear by default, but can be disabled by setting the Visible property to False. The progress lines color and style can be modified through the LineColor and LineStyle properties. The point’s shape and color on the taskbar can be modified through the PointColor and PointShape properties.

The following image illustrates the progress lines:

To see how to modify the progress lines, see Modifying the Progress Lines in your Project.