I have a problem with Gantt. If the task duration (both start and finish dates) are not in the frame, How can I drag it to the next dates which are not shown in the frame?
For example, in the following sample, I want to drag Task’s finish date to 20 May with mouse.
Each time a timeline scale changes its start_date and end_date values the render() method is called, which is quite resource-intensive. Therefore, the values of the boundaries of the scale are static by default.
You can also extend scaled dynamically during drag and drop, by repainting gantt from onTaskDrag event, here is a working demo: http://snippet.dhtmlx.com/0e9d36d13
But please keep in mind that it can work slowly on large charts.