hV_Graphics — Table

The table graphic displays a grid of interactive cells. Each cell can be activated separately. The table also acts as an input and returns the cell selected by touch.

The gTable is a class and contains, apart from the constructor, two functions: dDefine and draw. For the input part, three functions: enable, check and getIndex.

Temporary minimum and maximum values can be noticed with a green and red dot. All parameters are integers with an optional unit.

A table is declared with the gTable class:

The function of the gTable class to define a table is:

• define, with related screen, coordinates and size of the graphic, optional number of columns and rows, front and back colours:

Output

The gGauge class as output has one function:

• draw, with column and row coordinates and colour:
  

Input

The gGauge class as input has three functions:

• enable to activate the input;
• check to check whether the area of the table has been touched; and
• getIndex to retreive the column and row coordinates of the touched cell.

Those functions for input follow the same standard defined got the hV_GUI library.

The new library uses integers only to save memory (no need for the 6KB real library!) and processing power. 

The graphic is updated only if the value passed is different from the previous one. This allows smoother graphics and faster drawing.