Contents - Index


Overview

 

QtChart is a cross-platform application that provides a visual presentation of control system data.  

 

The basic design mimics a traditional chart recorder pen-and-paper device, but with several enhancements and limitations.

 

 

QtChart window layout

 

The QtChart application window is divided in to 4 main groups:

 

 

 

 

 

 

Adding a Trace

 

To add a trace, start by clicking to the right of one of the 8 colored squares in the Trace List (the grid of 8 colored boxes in the upper right).  The color of the rectangular box in the Trace-specific controls should change to match the color of the square you clicked next to.

 

In the text box immeadiately to the left of the colored rectangle, type the name of the data channel you want a trace for and press enter.  If the name is correct, and the channel is active, you should soon see the current value for the channel appear below the name, and a new trace line begin drawing in the Chart Window.

 

 

Deleting a Trace

 

To delete a trace, set the focus to the trace to be deleted by clicking on the name of the data channel for the trace in the Trace List (the grid of 8 colored boxes and names in the upper right).  The color of the rectangular box in the Trace-specific controls should change to match the color for the trace, and the name you clicked on should show up in the text box to the left of the colored rectangle.

 

To delete the trace, simply erase the name from the text box on the left and press Enter.  The name and values in the controls beneath the text window should all clear, and the name should be removed from the Trace List grid.

 

 

Changing settings

 

The settings for each trace can be changed to control its position and size in the Chart Window, whether it is visible or not, its color, and many other things.  For details see this page.