PictureInput.java

/*
 * Copyright 2016 Red Hat, Inc. and/or its affiliates.
 *
 * 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 org.kie.workbench.common.forms.common.rendering.client.widgets.picture;

import javax.annotation.PostConstruct;
import javax.enterprise.context.Dependent;
import javax.inject.Inject;

import com.google.gwt.event.logical.shared.ValueChangeEvent;
import com.google.gwt.event.logical.shared.ValueChangeHandler;
import com.google.gwt.event.shared.HandlerRegistration;
import com.google.gwt.user.client.ui.HasValue;
import com.google.gwt.user.client.ui.SimplePanel;
import org.kie.workbench.common.forms.common.rendering.client.widgets.picture.widget.PictureWidget;

@Dependent
public class PictureInput extends SimplePanel implements HasValue<String> {

    private PictureWidget widget;

    @Inject
    public PictureInput(PictureWidget widget) {
        this.widget = widget;
    }

    @PostConstruct
    protected void init() {
        this.add(widget);
    }

    private String value;

    public void init(int width,
                     int height) {
        widget.init(width,
                    height,
                    url -> setValue(url,
                                    true));
    }

    public void setPicture(String url) {
        setValue(url);
    }

    @Override
    public String getValue() {
        return value;
    }

    @Override
    public void setValue(String value) {
        this.setValue(value,
                      false);
    }

    @Override
    public void setValue(String value,
                         boolean fireEvents) {
        if (value == null) {
            value = "";
        }

        if (value.equals(getValue())) {
            return;
        }

        this.value = value;

        widget.setPictureUrl(value);

        if (fireEvents) {
            ValueChangeEvent.fire(this,
                                  value);
        }
    }

    public void setReadOnly(boolean readOnly) {
        widget.setReadOnly(readOnly);
    }

    @Override
    public HandlerRegistration addValueChangeHandler(ValueChangeHandler<String> valueChangeHandler) {
        return this.addHandler(valueChangeHandler,
                               ValueChangeEvent.getType());
    }
}