In chart, press left a few seconds. The arrow change to be a cross.Now i want to custom a function ,when i click a button the chart is multiple-select mode ,click anther button can be drag chart.How ? thanks
When you perform a long-press in empty area, you initiate the multi-select mode which is designed for this purpose only. Dragging a map happens with just clicking in empty area and dragging the pointer around. This function is intended to be overridden.