@Override public void valueChanged(@Nullable TreeSelectionEvent e) { Component selectedComponent = myContentPanel.getSelectedComponent(); if (selectedComponent == myColorPickerPanel) { Color color = myColorPicker.getColor(); myNewResourceAction.setEnabled(false); myResultResourceName = ResourceHelper.colorToString(color); updateResourceNameStatus(); } else { boolean isProjectPanel = selectedComponent == myProjectPanel.myComponent; ResourcePanel panel = isProjectPanel ? myProjectPanel : mySystemPanel; ResourceItem element = getSelectedElement(panel.myTreeBuilder, ResourceItem.class); setOKActionEnabled(element != null); myNewResourceAction.setEnabled( isProjectPanel && !panel.myTreeBuilder.getSelectedElements().isEmpty()); if (element == null) { myResultResourceName = null; } else { String prefix = panel == myProjectPanel ? "@" : ANDROID; myResultResourceName = prefix + element.getName(); } panel.showPreview(element); } notifyResourcePickerListeners(myResultResourceName); }