workspace-explorer/src/main/java/org/gcube/portlets/widgets/wsexplorer/client/load/WorkspaceExplorerLoadDialog.java

/**
 * 
 */
package org.gcube.portlets.widgets.wsexplorer.client.load;

import java.util.ArrayList;
import java.util.List;

import org.gcube.portlets.widgets.wsexplorer.client.WorkspaceExplorerConstants;
import org.gcube.portlets.widgets.wsexplorer.client.WorkspaceExplorerController;
import org.gcube.portlets.widgets.wsexplorer.client.event.LoadRootEvent;
import org.gcube.portlets.widgets.wsexplorer.client.notification.WorskpaceExplorerNotification.HasWorskpaceExplorerNotificationListener;
import org.gcube.portlets.widgets.wsexplorer.client.notification.WorskpaceExplorerNotification.WorskpaceExplorerNotificationListener;
import org.gcube.portlets.widgets.wsexplorer.shared.Item;
import org.gcube.portlets.widgets.wsexplorer.shared.ItemType;

import com.github.gwtbootstrap.client.ui.Button;
import com.github.gwtbootstrap.client.ui.Modal;
import com.github.gwtbootstrap.client.ui.ModalFooter;
import com.github.gwtbootstrap.client.ui.constants.ButtonType;
import com.github.gwtbootstrap.client.ui.event.HideEvent;
import com.github.gwtbootstrap.client.ui.event.HideHandler;
import com.google.gwt.event.dom.client.ClickEvent;
import com.google.gwt.event.dom.client.ClickHandler;


/**
 * The Class WorkspaceExplorerLoadDialog.
 *
 * @author Francesco Mangiacrapa francesco.mangiacrapa@isti.cnr.it
 * Jun 30, 2015
 */
public class WorkspaceExplorerLoadDialog extends Modal implements HasWorskpaceExplorerNotificationListener{

	public static final String SELECT = "Select";
	public static final String MAX_HEIGHT_DIALOG = "500px";
	public static final int WIDHT_DIALOG = 720;
	
	private Button selectButton;
	private WorkspaceExplorerLoadDialog INSTANCE = this;
	private boolean isSelect = false;
	private String captionTxt;
	private ModalFooter footer = new ModalFooter();
	private WorkspaceExplorerController controller = new WorkspaceExplorerController();
	private List<WorskpaceExplorerNotificationListener> listeners = new ArrayList<WorskpaceExplorerNotificationListener>();
	

	/**
	 * Instantiates a new workspace explorer load dialog.
	 *
	 * @param captionTxt the caption txt
	 * You can implement {@link WorskpaceExplorerNotificationListener} to receive events
	 */
	public WorkspaceExplorerLoadDialog(String captionTxt) {
		WorkspaceExplorerController.eventBus.fireEvent(new LoadRootEvent());	
		initDialog(captionTxt);
	}

	/**
	 * Instantiates a new workspace explorer load dialog.
	 *
	 * @param captionTxt the caption txt
	 * @param showOnlyFolders the show only folders
	 */
	public WorkspaceExplorerLoadDialog(String captionTxt, boolean showOnlyFolders) {
		
		if(showOnlyFolders){
			ItemType[] itemsType = new ItemType[2];
			itemsType[0] = ItemType.ROOT;
			itemsType[1] = ItemType.FOLDER;
			setSelectableTypes(itemsType);
			setShowableTypes(itemsType);
		}

		WorkspaceExplorerController.eventBus.fireEvent(new LoadRootEvent());	
		initDialog(captionTxt);
	}
	
	/**
	 * Instantiates a new workspace explorer load dialog.
	 *
	 * @param captionTxt captionTxt sets the text inside the caption, if null sets "Workspace Explorer"
	 * @param selectableTypes the selectable types
	 * @param showableTypes the showable types
	 * 
	 * You can implement {@link WorskpaceExplorerNotificationListener} to receive events
	 */
	public WorkspaceExplorerLoadDialog(String captionTxt, List<ItemType> selectableTypes, List<ItemType> showableTypes) {
		if(selectableTypes!=null){
			ItemType[] itemsType = new ItemType[selectableTypes.size()];
			itemsType = selectableTypes.toArray(itemsType);
			setSelectableTypes(selectableTypes.toArray(itemsType));
		}
		
		if(showableTypes!=null){
			ItemType[] itemsType = new ItemType[showableTypes.size()];
			itemsType = showableTypes.toArray(itemsType);
			setShowableTypes(showableTypes.toArray(itemsType));
		}
		
		WorkspaceExplorerController.eventBus.fireEvent(new LoadRootEvent());	
		initDialog(captionTxt);
	}
	

	/**
	 * Inits the dialog.
	 *
	 * @param captionTxt the caption txt
	 */
	private void initDialog(String captionTxt) {
		this.captionTxt = (captionTxt==null || captionTxt.isEmpty())?WorkspaceExplorerConstants.WORKSPACE_EXPLORER_CAPTION:captionTxt;
		setAnimation(false);
		setCloseVisible(true);
		setTitle(this.captionTxt);
		selectButton = new Button(SELECT);
		selectButton.setType(ButtonType.PRIMARY);
		setWidth(WIDHT_DIALOG);
		setMaxHeigth(MAX_HEIGHT_DIALOG);
		hide(false);
		
		addHideHandler(new HideHandler() {
			
			@Override
			public void onHide(HideEvent hideEvent) {
				if(!isSelect)
					notifyAborted();
			}
		});

		add(controller.getWorkspaceExplorerPanel());
		selectButton.addClickHandler(new ClickHandler() {

			@Override
			public void onClick(ClickEvent event) {
				isSelect = false;
				Item item = controller.getWsExplorer().getItemSelected();
				if(item!=null){
					isSelect = true;
					INSTANCE.hide();
					notifySelectedItem(item);
				}
			}
		});
		
		footer.add(selectButton);
		add(footer);
	}
	/**
	 * Notify selected item.
	 *
	 * @param selected the selected
	 */
	private void notifySelectedItem(Item selected){
		
		for (WorskpaceExplorerNotificationListener worskpaceExplorerNotificationListener : listeners) {
			worskpaceExplorerNotificationListener.onSelectedItem(selected);
		}
	}
	
	/**
	 * Notify aborted.
	 */
	private void notifyAborted(){
		
		for (WorskpaceExplorerNotificationListener worskpaceExplorerNotificationListener : listeners) {
			worskpaceExplorerNotificationListener.onAborted();
		}
	}
	
	/**
	 * Notify failed.
	 *
	 * @param t the t
	 */
	@SuppressWarnings("unused")
	private void notifyFailed(Throwable t){
		
		for (WorskpaceExplorerNotificationListener worskpaceExplorerNotificationListener : listeners) {
			worskpaceExplorerNotificationListener.onFailed(t);
		}
	}
	
	/**
	 * Gets the caption txt.
	 *
	 * @return the captionTxt
	 */
	public String getCaptionTxt() {
		return captionTxt;
	}

	/**
	 * Checks if is valid hide.
	 *
	 * @return the isValidHide
	 */
	public boolean isValidHide() {
		return isSelect;
	}
	
	/* (non-Javadoc)
	 * @see com.github.gwtbootstrap.client.ui.Modal#show()
	 */
	@Override
	public void show() {
		super.show();
		isSelect = false;
	}

	
	/* (non-Javadoc)
	 * @see org.gcube.portlets.widgets.wsexplorer.client.notification.WorskpaceExplorerNotification.HasWorskpaceExplorerNotificationListener#addWorkspaceExplorerNotificationListener(org.gcube.portlets.widgets.wsexplorer.client.notification.WorskpaceExplorerNotification.WorskpaceExplorerNotificationListener)
	 */
	@Override
	public void addWorkspaceExplorerNotificationListener(WorskpaceExplorerNotificationListener handler) {
		if(handler!=null)
			listeners.add(handler);
	}

	/* (non-Javadoc)
	 * @see org.gcube.portlets.widgets.wsexplorer.client.notification.WorskpaceExplorerNotification.HasWorskpaceExplorerNotificationListener#removeWorkspaceExplorerNotificationListener(org.gcube.portlets.widgets.wsexplorer.client.notification.WorskpaceExplorerNotification.WorskpaceExplorerNotificationListener)
	 */
	@Override
	public void removeWorkspaceExplorerNotificationListener(WorskpaceExplorerNotificationListener handler) {
		if(handler!=null){
			if(listeners.contains(handler))
				listeners.remove(handler);
		}
	}
	
	/**
	 * Set which items are selectable.
	 * @param selectableTypes the selectableTypes to set
	 */
	private void setSelectableTypes(ItemType ... selectableTypes) {
		controller.setSelectableTypes(selectableTypes);
	}
	

	/**
	 * Gets the selectable types.
	 *
	 * @return the selectable types
	 */
	public List<ItemType> getSelectableTypes() {
		return controller.getSelectableTypes();
	}
	
	/**
	 * Return the showable items.
	 * @return the showableTypes
	 */
	public List<ItemType> getShowableTypes() {
		return controller.getShowableTypes();
	}

	/**
	 * Set the showable items. The folders items are show as default.
	 * @param showableTypes the showableTypes to set
	 */
	private void setShowableTypes(ItemType ... showableTypes) {
		controller.setShowableTypes(showableTypes);
	}
}