I'm trying some functions of XBarRchart and XBarSigmaChart. And I found if I set the primaryChart.setChartDisplay(false) and setEnableScrollBar(true) in both chart (other charts might also, but I did not tried it), then the scrollbar just disappeared! Is it normally? or I might just doing something wrong? How to display the secondary chart without primary chart and still have the scroll bar?
What you describe is a bug. The position and size of the scrollbar is calculated with respect to the primaryChart. If the primary chart is not present, the scrollbar does not get positioned correctly. We never had a instance where a user wanted to display just the secondary chart, so it never showed up before. We will add code to handle the secondaryChart only situation. We will update the QCSPCChart software early next week and you will be able to download the newer version using the download links sent to you at the time of your order.