问题
I just need a little push. I have a chart with a series as a tpointseries. I am having difficultly in figuring out how to draw the series as a polygon/rectangle.
When I mean polygon or rectangular, you have 4 corners (bottom_left X/Y, top_left X/Y, top_right X/Y and bottom_right XY) which create 4 lines and fill the area between those 4 corners.
Thanks in advanced.
回答1:
1) Create series of TChartShape type with rectangle style and add shape with needed coordinates
2) Draw rectangle on chart canvas in OnAfterDraw event handler
来源：https://stackoverflow.com/questions/32145683/how-to-draw-polygon-rectangle-in-tchart