imageData.grabExcessHorizontalSpace = true;
imageData.grabExcessVerticalSpace = true;
imageViewer.setLayoutData(imageData);
// Tree
tree = new Tree(parent, SWT.NONE);
GridData treeData = new GridData(200, 300);
treeData.verticalAlignment = GridData.BEGINNING;
tree.setLayoutData(treeData);
ITreeNode root = new BasicTreeNode();