com.seanchenxi.gwt.ui.widget.SearchBox.java Source code

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Here is the source code for com.seanchenxi.gwt.ui.widget.SearchBox.java

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/*******************************************************************************
 * Copyright 2012 Xi CHEN
 *
 * 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.seanchenxi.gwt.ui.widget;

import com.google.gwt.core.client.GWT;
import com.google.gwt.core.client.Scheduler;
import com.google.gwt.core.client.Scheduler.ScheduledCommand;
import com.google.gwt.dom.client.Style.Unit;
import com.google.gwt.event.dom.client.ClickEvent;
import com.google.gwt.event.dom.client.ClickHandler;
import com.google.gwt.event.dom.client.FocusEvent;
import com.google.gwt.event.dom.client.FocusHandler;
import com.google.gwt.event.dom.client.KeyCodes;
import com.google.gwt.event.dom.client.KeyUpEvent;
import com.google.gwt.event.dom.client.KeyUpHandler;
import com.google.gwt.event.shared.HandlerRegistration;
import com.google.gwt.resources.client.ClientBundle;
import com.google.gwt.resources.client.CssResource;
import com.google.gwt.user.client.ui.Button;
import com.google.gwt.user.client.ui.HasAlignment;
import com.google.gwt.user.client.ui.HorizontalPanel;
import com.google.gwt.user.client.ui.PopupPanel;
import com.google.gwt.user.client.ui.TextBox;
import com.seanchenxi.gwt.ui.event.SearchEvent;
import com.seanchenxi.gwt.ui.event.SearchEvent.HasSearchHandlers;

public class SearchBox extends PopupPanel
        implements FocusHandler, KeyUpHandler, ClickHandler, HasSearchHandlers, SearchEvent.Handler {

    public interface Resources extends ClientBundle {

        public interface Style extends CssResource {
            final static String DEFAULT_CSS = "com/seanchenxi/gwt/ui/widget/SearchBox.css";

            String popSearchBox();

            String popSearchField();

            String popSearchButton();

            String popSearchContainer();
        }

        @ClientBundle.Source(Style.DEFAULT_CSS)
        Style style();
    }

    private static Resources resources;

    private TextBox field;
    private Button button;

    public static Resources getResources() {
        if (resources == null) {
            resources = GWT.create(Resources.class);
            resources.style().ensureInjected();
        }
        return resources;
    }

    public SearchBox() {
        super(true, true);
        HorizontalPanel container = new HorizontalPanel();
        setWidget(container);
        setStyleName(getResources().style().popSearchBox());
        container.setVerticalAlignment(HasAlignment.ALIGN_MIDDLE);
        container.add(field = new TextBox());
        container.add(button = new Button("Search"));
        container.setStyleName(getResources().style().popSearchContainer());
        field.setStyleName(getResources().style().popSearchField());
        button.setStyleName(getResources().style().popSearchButton());
        initAllHandlers();
    }

    public String getSeachValue() {
        return field.getValue();
    }

    public void setFieldWidth(String width) {
        field.setWidth(width);
    }

    public void setSeachValue(String slug) {
        field.setText(slug);
    }

    public void setFocus(boolean focused) {
        field.setFocus(focused);
        if (focused)
            field.selectAll();
    }

    private void initAllHandlers() {
        field.addFocusHandler(this);
        field.addKeyUpHandler(this);
        button.addClickHandler(this);
        addSearchHandler(this);
    }

    @Override
    public void onClick(final ClickEvent event) {
        Object obj = event.getSource();
        if (obj == button) {
            fireSearchEvent(field.getText());
        }
    }

    private void fireSearchEvent(final String keywords) {
        Scheduler.get().scheduleDeferred(new ScheduledCommand() {
            @Override
            public void execute() {
                SearchEvent.fire(keywords, SearchBox.this);
            }
        });
    }

    @Override
    public void onSearch(SearchEvent event) {
        Scheduler.get().scheduleDeferred(new ScheduledCommand() {
            @Override
            public void execute() {
                field.selectAll();
            }
        });
    }

    @Override
    public void onKeyUp(KeyUpEvent event) {
        switch (event.getNativeKeyCode()) {
        case KeyCodes.KEY_ENTER:
            if (field.getValue() != null && !field.getValue().isEmpty()) {
                fireSearchEvent(field.getText());
            }
            break;
        case KeyCodes.KEY_ESCAPE:
            hide();
            break;
        }
    }

    @Override
    public void onFocus(FocusEvent event) {
        field.selectAll();
    }

    @Override
    public HandlerRegistration addSearchHandler(SearchEvent.Handler handler) {
        return addHandler(handler, SearchEvent.getType());
    }

    @Override
    public void show() {
        super.show();
        setFocus(true);
    }

}