org.rest.client.ui.desktop.AddEncodingViewImpl.java Source code

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Here is the source code for org.rest.client.ui.desktop.AddEncodingViewImpl.java

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/*******************************************************************************
 * Copyright 2012 Pawe Pszty
 * 
 * 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.rest.client.ui.desktop;

import org.rest.client.event.AddEncodingEvent;
import org.rest.client.ui.AddEncodingView;

import com.google.gwt.core.client.GWT;
import com.google.gwt.core.client.Scheduler;
import com.google.gwt.dom.client.DivElement;
import com.google.gwt.event.dom.client.ClickEvent;
import com.google.gwt.event.dom.client.KeyCodes;
import com.google.gwt.event.dom.client.KeyDownEvent;
import com.google.gwt.event.dom.client.KeyDownHandler;
import com.google.gwt.event.logical.shared.CloseEvent;
import com.google.gwt.event.logical.shared.CloseHandler;
import com.google.gwt.uibinder.client.UiBinder;
import com.google.gwt.uibinder.client.UiField;
import com.google.gwt.uibinder.client.UiHandler;
import com.google.gwt.user.client.ui.DialogBox;
import com.google.gwt.user.client.ui.HasText;
import com.google.gwt.user.client.ui.PopupPanel;
import com.google.gwt.user.client.ui.TextBox;
import com.google.gwt.user.client.ui.Widget;
import com.google.web.bindery.event.shared.EventBus;

public class AddEncodingViewImpl implements HasText, AddEncodingView, CloseHandler<PopupPanel>, KeyDownHandler {

    interface Binder extends UiBinder<DialogBox, AddEncodingViewImpl> {
        Binder BINDER = GWT.create(Binder.class);
    }

    @UiField
    DialogBox dialog;
    @UiField
    TextBox encoding;
    @UiField
    DivElement errorField;
    private EventBus eventBus;
    private boolean eventFired = false;
    private boolean hasErrorDiplayed = false;

    public AddEncodingViewImpl() {
        Binder.BINDER.createAndBindUi(this);
        dialog.addDomHandler(this, KeyDownEvent.getType());
        dialog.addCloseHandler(this);

        encoding.addKeyDownHandler(new KeyDownHandler() {
            @Override
            public void onKeyDown(KeyDownEvent event) {
                if (hasErrorDiplayed) {
                    errorField.setInnerText("");
                    errorField.addClassName("hidden");
                    hasErrorDiplayed = false;
                }
            }
        });

        Scheduler.get().scheduleDeferred(new Scheduler.ScheduledCommand() {
            @Override
            public void execute() {
                encoding.getElement().focus();
            }
        });
    }

    @Override
    public void show() {
        dialog.show();
        dialog.center();
    }

    @UiHandler("cancel")
    void onDismiss(ClickEvent event) {
        AddEncodingEvent ev = new AddEncodingEvent(null);
        eventBus.fireEvent(ev);
        eventFired = true;
        dialog.hide();
    }

    @UiHandler("save")
    void onSave(ClickEvent event) {
        String currentValue = encoding.getValue();
        if (currentValue.trim().isEmpty()) {
            errorField.setInnerText("You must enter encoding value");
            errorField.removeClassName("hidden");
            hasErrorDiplayed = true;
            return;
        }
        AddEncodingEvent ev = new AddEncodingEvent(currentValue);
        eventBus.fireEvent(ev);
        eventFired = true;
        dialog.hide();
    }

    public void setText(String text) {
        encoding.setValue(text);
    }

    public String getText() {
        return encoding.getValue();
    }

    @Override
    public void onClose(CloseEvent<PopupPanel> event) {
        if (eventFired == false) {
            AddEncodingEvent ev = new AddEncodingEvent(null);
            AddEncodingViewImpl.this.eventBus.fireEvent(ev);
        }
    }

    @Override
    public void onKeyDown(KeyDownEvent event) {

        int keyCode = event.getNativeKeyCode();
        if (keyCode == KeyCodes.KEY_ENTER) {
            onSave(null);
        } else if (keyCode == KeyCodes.KEY_ESCAPE) {
            onDismiss(null);
        }
    }

    @Override
    public void setEventBus(EventBus eventBus) {
        this.eventBus = eventBus;
    }

    @Override
    public Widget asWidget() {
        return this.asWidget();
    }
}