/**
 * Instantiates a welcome layout.
 */
public WelcomeLayout() {
    super(i18n.welcomeText());
    this.scClassName = "VLayout";
    
    SpacerItem spacerItem = new SpacerItem();
    spacerItem.setHeight(20);

    this.welcomeText = new StaticTextItem("welcomeText");
    this.welcomeText.setShowTitle(false);
    this.welcomeText.setValue("");
    
    this.roleText = new StaticTextItem("roleText");
    this.roleText.setShowTitle(false);
    this.roleText.setValue("");
    
    this.form.setFields(this.headerItem, spacerItem, spacerItem, this.welcomeText, spacerItem, this.roleText);
    // add to mainLayout
    addMember(this.form);
}
 

private SpacerItem createSpacerItem(String width, FormItemIfFunction showIf) {
    SpacerItem item = new SpacerItem();
    if (width != null) {
        item.setWidth(width);
    }
    if (showIf != null) {
        item.setShowIfCondition(showIf);
    }
    return item;
}
 

private HLayout createSingle(String ruleName){
    this.singleCount++;
    
    DynamicForm block1 = new DynamicForm();
    block1.setWidth("50%");
    block1.setNumCols(1);
    
    DynamicForm block2 = new DynamicForm();
    block2.setWidth("50%");
    block2.setNumCols(1);
    
    SelectItem rule1Item = new SelectItem();
    rule1Item.setShowTitle(false);
    rule1Item.setValueMap(this.rulesHashMap);
    rule1Item.setWidth(this.selectItemWidth);
    if (ruleName != null) {
        rule1Item.setValue(ruleName);
    }
    
    SpacerItem spacerItem = new SpacerItem();
    spacerItem.setShowTitle(false);
    spacerItem.setHeight(20);
    
    block2.setFields(rule1Item);

    HLayout layout = new HLayout();
    layout.setWidth(200);
    layout.setHeight(25);
    layout.addMember(block1);
    layout.addMember(block2);

    // save tree
    this.tempTree = this.rootTree;
    Tree right = new Tree(rule1Item, null, null);

    this.rootTree = new Tree(this.singleOperator, this.tempTree, right);

    return layout;
}
 

private void refresh() {
	vm.clearValues();
	vm.clearErrors(false);

	if (formsContainer.getMembers() != null)
		formsContainer.removeMembers(formsContainer.getMembers());

	DynamicForm form2 = new DynamicForm();
	form2.setWidth100();
	form2.setTitleOrientation(TitleOrientation.TOP);
	form2.setValuesManager(vm);
	form2.setNumCols(1);

	final TextAreaItem automation = ItemFactory.newTextAreaItemForAutomation("automation", "automation",
			trigger.getAutomation(), changedHandler, false);
	automation.setStartRow(false);
	automation.setWidth("*");
	automation.setDisabled(trigger.getRoutine()!=null);
	
	form2.setItems(automation);
	
	DynamicForm form1 = new DynamicForm();
	form1.setNumCols(2);
	form1.setTitleOrientation(TitleOrientation.TOP);
	form1.setValuesManager(vm);
	form1.setHeight100();

	SelectItem events = ItemFactory.newEventsSelector("events", I18N.message("triggeron"), changedHandler, true, true,
			true);
	events.setRowSpan(3);
	events.setValues(trigger.getEventsArray());

	SpacerItem spacer = new SpacerItem();
	spacer.setHeight(100);

	SelectItem routine = ItemFactory.newAutomationRoutineSelector("routine",
			trigger.getRoutine() != null ? trigger.getRoutine().getId() : null, changedHandler, true);
	routine.setEndRow(true);
	routine.addChangedHandler(changedHandler);
	ChangedHandler cngHandler = new ChangedHandler() {
		@Override
		public void onChanged(ChangedEvent event) {
			if (event == null) {
				automation.setDisabled(false);
			} else {
				automation.setDisabled(event.getValue() != null && !event.getValue().toString().isEmpty());
			}
		}
	};
	routine.addChangedHandler(cngHandler);
	
	form1.setItems(events, folderSelector, routine, spacer);

	formsContainer.setMembers(form1, form2);
}
 

private void addSingle(String op, String ruleName){
    // get all members from mainLayout and clear the layout
    Canvas[] members = this.ruleBlockLayout.getMembers();
    this.ruleBlockLayout.removeMembers(this.ruleBlockLayout.getMembers());
    
    LinkedHashMap<String, String> operatorHashMap = getLogicalOperators();

    VLayout v2 = new VLayout();
    v2.setWidth("70%");
    v2.addMember(members[0]);
    v2.addMember(createSingle(ruleName));
    
    DynamicForm block1 = new DynamicForm();
    block1.setWidth("30%");
    block1.setNumCols(1);
    
    this.singleOperator = new SelectItem();
    this.singleOperator.setShowTitle(false);
    this.singleOperator.setWidth(this.operatorWidth);
    this.singleOperator.setValueMap(operatorHashMap);
    this.singleOperator.setTextAlign(Alignment.CENTER);
    if (op != null) {
        this.singleOperator.setValue(op);
    } else {
        this.singleOperator.setValue(LogicalOperator.AND.toString());
    }
    
    SpacerItem spacerItem = new SpacerItem();
    spacerItem.setShowTitle(false);
    spacerItem.setHeight(20);
    
    block1.setFields(spacerItem, spacerItem, this.singleOperator);

    HLayout layout = new HLayout();
    layout.setWidth(200);
    layout.setHeight(25);
    layout.setEdgeMarginSize(1);
    layout.setEdgeSize(2);
    layout.setShowEdges(true);
    layout.addMember(block1);
    layout.addMember(v2);

    this.ruleBlockLayout.addMember(layout);
}