com.haulmont.cuba.web.widgets.CComboBox.java Source code

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Here is the source code for com.haulmont.cuba.web.widgets.CComboBox.java

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/*
 * Copyright (c) 2008-2018 Haulmont.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.haulmont.cuba.web.widgets;

import com.vaadin.event.Action;
import com.vaadin.event.ActionManager;
import com.vaadin.event.ShortcutListener;
import com.vaadin.server.ErrorMessage;
import com.vaadin.server.PaintException;
import com.vaadin.server.PaintTarget;
import com.vaadin.shared.Registration;
import com.vaadin.ui.ComboBox;
import com.vaadin.ui.LegacyComponent;

import java.util.Map;
import java.util.function.BiFunction;

public class CComboBox<V> extends ComboBox<V> implements Action.Container, LegacyComponent {

    /**
     * Keeps track of the Actions added to this component, and manages the
     * painting and handling as well.
     */
    protected ActionManager shortcutsManager;

    protected BiFunction<Object, Object, Boolean> customValueEquals;

    public CComboBox() {
    }

    @Override
    public ErrorMessage getErrorMessage() {
        ErrorMessage superError = super.getErrorMessage();
        // vaadin8
        /*if (!isReadOnly() && isRequiredIndicatorVisible() && isEmpty()) {
            
        ErrorMessage error = AbstractErrorMessage.getErrorMessageForException(
                new com.vaadin.v7.data.Validator.EmptyValueException(getRequiredError()));
        if (error != null) {
            return new CompositeErrorMessage(superError, error);
        }
        }*/

        return superError;
    }

    @Override
    public void paintContent(PaintTarget target) throws PaintException {
        if (shortcutsManager != null) {
            shortcutsManager.paintActions(null, target);
        }
    }

    @Override
    protected ActionManager getActionManager() {
        if (shortcutsManager == null) {
            shortcutsManager = new ActionManager(this);
        }
        return shortcutsManager;
    }

    @Override
    public void changeVariables(Object source, Map<String, Object> variables) {
        // Actions
        if (shortcutsManager != null) {
            shortcutsManager.handleActions(variables, this);
        }
    }

    @Override
    public Registration addShortcutListener(ShortcutListener listener) {
        getActionManager().addAction(listener);
        return () -> getActionManager().removeAction(listener);
    }

    @Override
    public void removeShortcutListener(ShortcutListener listener) {
        getActionManager().removeAction(listener);
    }

    @Override
    public void addActionHandler(Action.Handler actionHandler) {
        getActionManager().addActionHandler(actionHandler);
    }

    @Override
    public void removeActionHandler(Action.Handler actionHandler) {
        getActionManager().removeActionHandler(actionHandler);
    }

    /* vaadin8
        @Override
        protected boolean fieldValueEquals(Object value1, Object value2) {
    if (customValueEquals != null) {
        Boolean equals = customValueEquals.apply(value1, value2);
        if (equals != null) {
            return equals;
        }
    }
    // only if instance the same,
    // we can set instance of entity with the same id but different property values
    return super.fieldValueEquals(value1, value2);
        }*/

    public BiFunction<Object, Object, Boolean> getCustomValueEquals() {
        return customValueEquals;
    }

    public void setCustomValueEquals(BiFunction<Object, Object, Boolean> customValueEquals) {
        this.customValueEquals = customValueEquals;
    }
}