nl.ru.languageininteraction.language.client.view.MenuView.java Source code

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Here is the source code for nl.ru.languageininteraction.language.client.view.MenuView.java

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/*
 * Copyright (C) 2014 Language In Interaction
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 */
package nl.ru.languageininteraction.language.client.view;

import com.google.gwt.dom.client.Style;
import com.google.gwt.event.dom.client.ClickEvent;
import com.google.gwt.event.dom.client.ClickHandler;
import com.google.gwt.event.dom.client.TouchEndEvent;
import com.google.gwt.event.dom.client.TouchEndHandler;
import com.google.gwt.safehtml.shared.SafeHtmlBuilder;
import com.google.gwt.user.client.ui.Button;
import com.google.gwt.user.client.ui.FlexTable;
import com.google.gwt.user.client.ui.HasHorizontalAlignment;
import com.google.gwt.user.client.ui.Label;
import java.util.ArrayList;
import nl.ru.languageininteraction.language.client.listener.PresenterEventListner;

/**
 * @since Oct 31, 2014 11:36:28 AM (creation date)
 * @author Peter Withers <p.withers@psych.ru.nl>
 */
public class MenuView extends ComplexView {

    final private ArrayList<Button> buttonsArray = new ArrayList<>();
    private FlexTable flexTable = null;

    public void addMenuItem(final PresenterEventListner menuItemListerner, final boolean menuEnabled) {
        if (flexTable == null) {
            flexTable = new FlexTable();
            flexTable.setStylePrimaryName("menuTable");
            outerPanel.setStylePrimaryName("menuOuter");
            outerPanel.setHorizontalAlignment(HasHorizontalAlignment.ALIGN_CENTER);
            outerPanel.add(flexTable);
        }
        final Button menuButton = new Button(
                new SafeHtmlBuilder().appendEscapedLines(menuItemListerner.getLabel()).toSafeHtml());
        buttonsArray.add(menuButton);
        menuButton.addStyleName("menuButton");
        menuButton.setEnabled(menuEnabled);
        menuButton.addClickHandler(new ClickHandler() {

            @Override
            public void onClick(ClickEvent event) {
                event.preventDefault();
                menuItemListerner.eventFired(menuButton);
            }
        });
        menuButton.addTouchEndHandler(new TouchEndHandler() {

            @Override
            public void onTouchEnd(TouchEndEvent event) {
                event.preventDefault();
                menuItemListerner.eventFired(menuButton);
            }
        });
        final int rowCount = flexTable.getRowCount();
        flexTable.setWidget(rowCount, 0, menuButton);
    }

    @Override
    protected void parentResized(int height, int width, String units) {
        super.parentResized(height, width, units);
        boolean portrate = height > width;
        final int maxFontPx = 30;
        final boolean singleColumnOnly = (buttonsArray.size() * maxFontPx < height);
        final int rowPerColumn = (portrate || singleColumnOnly) ? buttonsArray.size() : buttonsArray.size() / 2;
        int textHeight = (height / (3 + rowPerColumn)) / 3;
        textHeight = (textHeight > maxFontPx) ? maxFontPx : textHeight;
        int row = 0;
        int col = 0;
        flexTable.removeAllRows();
        flexTable.setCellPadding(textHeight / 7);
        for (Button menuButton : buttonsArray) {
            menuButton.getElement().getStyle().setFontSize(textHeight, Style.Unit.PX);
            flexTable.setWidget(row, col, menuButton);
            row++;
            if (!portrate) {
                if (row > rowPerColumn) {
                    row = 0;
                    col++;
                    flexTable.setWidget(row, col, new Label(""));
                    col++;
                }
            }
        }
    }
}