es.eucm.ead.editor.view.controllers.SearchResultsWidget.java Source code

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Here is the source code for es.eucm.ead.editor.view.controllers.SearchResultsWidget.java

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/**
 * eAdventure is a research project of the
 *    e-UCM research group.
 *
 *    Copyright 2005-2014 e-UCM research group.
 *
 *    You can access a list of all the contributors to eAdventure at:
 *          http://e-adventure.e-ucm.es/contributors
 *
 *    e-UCM is a research group of the Department of Software Engineering
 *          and Artificial Intelligence at the Complutense University of Madrid
 *          (School of Computer Science).
 *
 *          CL Profesor Jose Garcia Santesmases 9,
 *          28040 Madrid (Madrid), Spain.
 *
 *          For more info please visit:  <http://e-adventure.e-ucm.es> or
 *          <http://www.e-ucm.es>
 *
 * ****************************************************************************
 *
 *  This file is part of eAdventure
 *
 *      eAdventure is free software: you can redistribute it and/or modify
 *      it under the terms of the GNU Lesser General Public License as published by
 *      the Free Software Foundation, either version 3 of the License, or
 *      (at your option) any later version.
 *
 *      eAdventure is distributed in the hope that it will be useful,
 *      but WITHOUT ANY WARRANTY; without even the implied warranty of
 *      MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *      GNU Lesser General Public License for more details.
 *
 *      You should have received a copy of the GNU Lesser General Public License
 *      along with eAdventure.  If not, see <http://www.gnu.org/licenses/>.
 */
package es.eucm.ead.editor.view.controllers;

import com.badlogic.gdx.scenes.scene2d.Actor;
import com.badlogic.gdx.scenes.scene2d.Event;
import com.badlogic.gdx.scenes.scene2d.EventListener;
import com.badlogic.gdx.scenes.scene2d.InputEvent;
import com.badlogic.gdx.scenes.scene2d.InputListener;
import com.badlogic.gdx.scenes.scene2d.ui.ScrollPane;
import com.badlogic.gdx.scenes.scene2d.ui.Skin;
import com.badlogic.gdx.scenes.scene2d.ui.TextField;
import com.badlogic.gdx.scenes.scene2d.utils.FocusListener;
import com.badlogic.gdx.utils.Array;
import com.badlogic.gdx.utils.Pools;

import es.eucm.ead.editor.indexes.FuzzyIndex;
import es.eucm.ead.editor.indexes.FuzzyIndex.Term;
import es.eucm.ead.editor.view.controllers.SearchResultsWidget.SearchEvent.Type;
import es.eucm.ead.editor.view.widgets.layouts.LinearLayout;
import es.eucm.ead.editor.view.widgets.menu.ContextMenu;

/**
 * A widget with a text field to perform searches, with a menu with the results
 * of the search.
 */
public class SearchResultsWidget extends LinearLayout {

    public static final float RESULTS_HEIGHT = 200.0f;

    private FuzzyIndex fuzzyIndex;

    private ContextMenu contextMenu;

    private ScrollPane scrollPane;

    private Array<Term> found;

    public SearchResultsWidget(FuzzyIndex index, Skin skin) {
        super(false);
        final TextField searchField = new TextField("", skin);
        addListener(new FocusListener() {
            @Override
            public void keyboardFocusChanged(FocusEvent event, Actor actor, boolean focused) {
                if (focused) {
                    event.getStage().setKeyboardFocus(searchField);
                }
            }

            @Override
            public void scrollFocusChanged(FocusEvent event, Actor actor, boolean focused) {
                if (focused) {
                    event.getStage().setScrollFocus(scrollPane);
                }
            }
        });
        searchField.addListener(new InputListener() {
            @Override
            public boolean keyTyped(InputEvent event, char character) {
                fuzzyIndex.search(searchField.getText(), found);

                contextMenu.clearChildren();

                for (Term term : found) {
                    contextMenu.item(term.getTermString()).setUserObject(term);
                }
                contextMenu.pack();
                scrollPane.setWidth(contextMenu.getWidth());
                return true;
            }
        });
        add(searchField).expandX();

        contextMenu = new ContextMenu(skin);
        contextMenu.addCaptureListener(new InputListener() {
            @Override
            public boolean touchDown(InputEvent event, float x, float y, int pointer, int button) {
                fireTermSelected((Term) event.getTarget().getUserObject());
                return true;
            }
        });

        scrollPane = new ScrollPane(contextMenu) {
            @Override
            public float getPrefHeight() {
                return Math.min(RESULTS_HEIGHT, getWidget().getHeight());
            }
        };

        add(scrollPane).expandX();
        fuzzyIndex = index;
        found = new Array<Term>();
    }

    private void fireTermSelected(Term term) {
        SearchEvent searchEvent = Pools.obtain(SearchEvent.class);
        searchEvent.setType(Type.termSelected);
        searchEvent.setTerm(term);
        fire(searchEvent);
        Pools.free(searchEvent);
    }

    public static class SearchListener implements EventListener {

        @Override
        public boolean handle(Event event) {
            if (event instanceof SearchEvent) {
                SearchEvent searchEvent = (SearchEvent) event;
                switch (searchEvent.getType()) {
                case termSelected:
                    termSelected(searchEvent.getTerm());
                    break;
                }
            }
            return false;
        }

        /**
         * A term has been selected
         */
        public void termSelected(Term term) {
        }
    }

    public static class SearchEvent extends Event {

        public enum Type {
            termSelected
        }

        private Type type;

        private Term term;

        public Type getType() {
            return type;
        }

        public void setType(Type type) {
            this.type = type;
        }

        public Term getTerm() {
            return term;
        }

        public void setTerm(Term term) {
            this.term = term;
        }
    }
}