Create a Split Pane in IntelliJ from Plugin - intellij-idea

Question

I am working on an IntelliJ plugin, where the use case is to create a split pane within the editor and add some custom code.
The IntelliJ community repo defines RadSplitPane that can be extended to create a split pane, but it does not render a split pane.
So my question is
is there an out of the box class that I can use to create a split
editor (preferably vertical), and passing in some custom string to
display?
My IntelliJ version is 2017.3
A code example would be really helpful.
Thank you

Answer 1

There are two ways to do this, as I can understand so far.
FileEditorManager CreateSplitter
// get the project
Project project = event.getProject();
// get File editor Manager Ex
final FileEditorManagerEx fileEditorManagerEx =
FileEditorManagerEx.getInstanceEx(project);
// get the editorWindow from File Editor Manager Ex
EditorWindow currentWindow = fileEditorManagerEx.getCurrentWindow();
// create a split
fileEditorManager.createSplitter(myOrientation, currentWindow);
EditorWindow.split
// get the project
Project project = event.getProject();
// get File editor Manager Ex
final FileEditorManagerEx fileEditorManagerEx =
FileEditorManagerEx.getInstanceEx(project);
// get the editorWindow from File Editor Manager Ex
EditorWindow currentWindow = fileEditorManagerEx.getCurrentWindow();
// Create a virtual file
VirtualFile virtualFile = new LightVirtualFile(origFile.getName(),origFile.getFileType(), results.get(0));
// create a split
fileEditorManager.createSplitter(myOrientation, currentWindow);
The first one, creates a copy of the existing virtual file in the current editor and creates a split, the second one can be supplied with an instance of virtual file.