Delphi Cookbook - Third Edition

Getting ready

In the FireMonkey framework, there is a component called TPath (it is defined in the FMX.Objects.pas unit; do not confuse it with the TPath component defined in the System.IOUtils.pas unit). The TPath component is able to interpret and show an SVG path. In this recipe, you'll see how to use it to draw complex vector shapes and fonts.

Let's say you want to monitor a continuous stream of data, maybe a value read from some kind of hardware or some value related to finance stock quotes. You want fresh data to be pushed from the right-hand side and the oldest data removed from the left-hand side. At any time, you can see the last 20 values, scrolling from right to left. This is shown in the following screenshot:

Figure 4.13: Scrolling ...