MaterialMiniSideNav.java

package gwt.material.design.client.ui;

import com.google.gwt.user.client.ui.Widget;
import com.google.web.bindery.event.shared.HandlerRegistration;
import gwt.material.design.client.base.MaterialWidget;
import gwt.material.design.client.constants.SideNavType;

import static gwt.material.design.client.js.JsMaterialElement.$;

public class MaterialMiniSideNav extends MaterialSideNav {

    private boolean expandable;
    private HandlerRegistration miniWithOpeningExpandHandler;
    private HandlerRegistration miniWithClosingExpandHandler;

    @Override
    protected void processType(SideNavType type) {
        addStyleName("mini-with-expand");
        applyMiniSideNav();
    }

    protected void applyMiniSideNav() {
        applyBodyScroll();
        applyTransition(getMain(), 400);
        applyTransition(getFooter(), 400);

        int originalWidth = getWidth();
        int miniWidth = 64;
        pushElement(getMain(), miniWidth);
        pushElementMargin(getFooter(), miniWidth);
        setShowOnAttach(false);
        setWidth(miniWidth);

        if (miniWithOpeningExpandHandler == null) {
            miniWithOpeningExpandHandler = addOpeningHandler(event -> expand(originalWidth));
        }

        if (miniWithClosingExpandHandler == null) {
            miniWithClosingExpandHandler = addClosingHandler(event -> collapse(miniWidth));
        }

        // Add Opening when sidenav link is clicked by default
        for (Widget w : getChildren()) {
            if (w instanceof MaterialWidget && expandable) {
                $(w.getElement()).off("click").on("click", (e, param1) -> {
                    if (!getElement().hasClassName("expanded")) {
                        show();
                    }
                    return true;
                });
            }
        }
    }

    public void setExpandable(boolean expandable) {
        this.expandable = expandable;
    }
    
    public boolean isExpandable() {
        return expandable;
    }
}