Chart Functions

 

Name 

Description 

 

ChCreate 

This function creates a CHART object with the parameters given. It automatically attaches the new object into a global linked list of objects and returns the address of the object. 

 

ChDraw 

This function renders the object on the screen using the current parameter settings. Location of the object is determined by the left, top, right and bottom parameters. The colors used are dependent on the state of the object. The font used is determined by the style scheme set.
The colors of the bars of the bar chart or sectors of the pie chart can be the default color table or user defined color table set by ChSetColorTable() function.
When rendering objects of the same type, each object must be rendered completely before the rendering of the next object is... more 

 

ChAddDataSeries 

This function creates a DATASERIES object and populates the structure with the given parameters. 

 

ChRemoveDataSeries 

This function removes DATASERIES object from the list of DATASERIES objects and frees the memory used of that removed object. The position of the object to be removed is specified by the number parameter. If the list has only one member, it removes the member regardless of the number given. 

 

ChSetValueRange 

This function sets the minimum and maximum range of values that the bar chart will show. The criteria is that min <= max. 

 

ChSetPercentRange 

This function sets the minimum and maximum range of percentage that the bar chart will show. The criteria is that min <= max. This affects bar charts only and CH_PERCENTAGE bit state is set. 

 

ChSetSampleRange 

This function sets the sample start and sample end when drawing the chart. Together with the data series' SHOW_DATA flags the different way of displaying the chart data is achieved.
 

 

ChFreeDataSeries 

This function removes DATASERIES object from the list of DATASERIES objects and frees the memory used of that removed object. 

 

ChTranslateMsg 

This function evaluates the message from a user if the message will affect the object or not. The table below enumerates the translated messages for each event of the touch screen and keyboard inputs.