hV_Graphics — Multiple

The histogram graphic displays up to four series of values on a time axis.

The gMultiple is a class and contains, apart from the constructor, two functions: dDefine and draw.

All parameters are integers with an optional unit.

A mutiple histogram is declared with the gMultiple class:

The gMultiple class has two functions:

• dDefine, with related screen, with top-left coordinates, width and height of the graphic, name, minimum and maximum values, unit and colour for for each of the four series, lapse in ms, horizontal and vertical grids, continuity, back, front and grid colours:
  

Only the first series in required, others are optional. No memory option is offered for local maximum and minimum.

• draw, with up to four values:
  

Setting memory to zero removes that feature, as pictured right.

The lapse option ensures the values are distanced in time by the number of milliseconds provided.

The continuity option manages how values are displayed once the right side has been reached.

With continuity turned off, a moving vertical cursor separates new and old values. When the cursor has reached the right side, it starts over from the left side. Then new values are printed on top of old values. This is the default option.

With continuity turned on, previous values are shifted to the left so new values are added to the right.

The whole graph seems to be animated.

To display one single series of values, consider the Histogram instead.