Custom implementation of GUI Designer table

You can modify the default list of UI elements programmatically via com.intellij.uiDesigner.palette.Palette#addItem

If you want to change the groups completely depending on given file, see com.intellij.ide.palette.PaletteItemProvider

Thanks for the response. I tried importing that class into a new project, however intellij isn't recognizing it. I have project sdk set to Intellij IDEA IU. Any ideas why this might be the case?

You need to add UI designer plugin (com.intellij.uiDesigner) to your classpath and dependency in plugin.xml

http://www.jetbrains.org/intellij/sdk/docs/basics/plugin_structure/plugin_dependencies.html

Thank you. I have the palette but I don't think it suits my needs. I just need the properties table from the GUI form. From what I can tell, the palette isn't to be used as a GUI component. 

I have the properties table by creating custom PropertyTable and RadPropertyTable classes (com.intellij.designer). I then add elements to the table via a custom PropertiesContainer class, which creates two properties in the getProperties() method and adds them to the table. This works, however I can't seem to add values, only property names.

If the palette can achieve a similar result by plugging it into a tool window/JPanel, please let me know. If you can see a way to make this work or an easier way, please also let me know. Thank you for the help.

Could you please show implementation of your custom Property?

private class CustomPropContainer extends RadComponent {

    @Override
    public List getProperties() {
        List<Property> properties = new ArrayList<>();

        Property one = new Property(null, "this is me") {
            @NotNull
            @Override
            public PropertyRenderer getRenderer() {
                return new AbstractResourceRenderer() {
                    @Override
                    protected void formatValue(RadComponent container, Object value) {
                        container.setClientProperty("this is me", "i am the value");
                    }
                };
            }

            @Nullable
            @Override
            public PropertyEditor getEditor() {
                return null;
            }
        };

        properties.add(one);

        return properties;

This adds a row with the property this is me, but no value. I've tried using setValueAtRow but ran into various errors.

Please try to return proper editor in com.intellij.designer.model.Property#getEditor

Thank you so much for your patience. It now works by making my own editor and setting the get component to return a JLabel.