Range Slider for MALTAB app designer

A range slider with two knobs with and without knobs limitation

These codes creates range slider with two knobs using Axes and two rectangular ROIs (as knobs) in MATLAB app designer.

Both apps use WindowButtonDown function in the figure to find any of the knobs have been clicked. Then the apps change to WindowButtonMotion function in the figure to track the mouse movement. At the end, the apps use WindowButtonUp in the figure to stop the dragging.

There are two different apps presented here. One where one knob (red knob in the app) is smaller or equal than other knob (blue in the app) and the other where there is no limitation on the knob.

In the case of limitng knobs, there is a parameter that controls their minimum distance which can be changed in the code.