Get system default color from non Ui thread

Question

In one of my class I have the following code:

private static final Color GREEN = new Color(null, 0, 255, 0);

I know the Display class provide the following method:

Display.getSystemColor(int id)

in order to return "default" system colors instead of instantiating new colors. What is the best solution to get a Display instance in the context of static code called in a non Ui thread ?

Answer 1

Do all the UI informational calls in the main initialization before creating any threads. Save the data for subsequent use in non UI threads.

Answer 2

You will have to use Display.getDefault().syncExec(...) call. Inside your runnable you can execute something like Display.getDefault().getSystemColor(...). In order to return the value, you will need to keep it in a field in your runnable and then access that field from the invoking method.

Since the executing is with syncExec, make sure not to enter a dead-lock (the UI calls your service which tried to call the UI can cause it).

Answer 3

PlatformUi.getWorkbench().getDisplay()