org.obiba.opal.web.gwt.app.client.ui.CriterionDropdown.java Source code

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Here is the source code for org.obiba.opal.web.gwt.app.client.ui.CriterionDropdown.java

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/*
 * Copyright (c) 2013 OBiBa. All rights reserved.
 *
 * This program and the accompanying materials
 * are made available under the terms of the GNU Public License v3.0.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

package org.obiba.opal.web.gwt.app.client.ui;

import javax.annotation.Nonnull;
import javax.annotation.Nullable;

import com.google.gwt.user.client.Random;
import org.obiba.opal.web.gwt.app.client.i18n.Translations;
import org.obiba.opal.web.model.client.magma.VariableDto;
import org.obiba.opal.web.model.client.search.QueryResultDto;

import com.github.gwtbootstrap.client.ui.CheckBox;
import com.github.gwtbootstrap.client.ui.DropdownButton;
import com.github.gwtbootstrap.client.ui.RadioButton;
import com.github.gwtbootstrap.client.ui.resources.ButtonSize;
import com.google.gwt.core.client.GWT;
import com.google.gwt.dom.client.Element;
import com.google.gwt.event.dom.client.ClickEvent;
import com.google.gwt.event.dom.client.ClickHandler;
import com.google.gwt.safehtml.shared.SafeHtmlBuilder;
import com.google.gwt.user.client.ui.Widget;

public abstract class CriterionDropdown extends DropdownButton {

    protected final Translations translations = GWT.create(Translations.class);

    protected VariableDto variable;

    protected QueryResultDto queryResult;

    protected String fieldName;

    protected final ListItem radioControls = new ListItem();

    private final String groupId;

    CriterionDropdown(VariableDto variableDto, @Nonnull String fieldName, @Nullable QueryResultDto termDto) {
        variable = variableDto;
        this.fieldName = fieldName;
        queryResult = termDto;

        groupId = String.valueOf(Random.nextInt(1000000)); //to be used in radio button names, to make they don't clash

        setSize(ButtonSize.SMALL);
        updateCriterionFilter(translations.criterionFiltersMap().get("all"));

        radioControls.addStyleName("controls");

        addRadioButtons(getNoEmptyCount());

        Widget specificControls = getSpecificControls();
        if (specificControls != null) {
            add(specificControls);
        }
    }

    private int getNoEmptyCount() {
        int nb = 0;
        if (queryResult != null) {

            if (queryResult.getFacetsArray().length() > 0) {
                if (queryResult.getFacetsArray().get(0).hasStatistics()) {
                    // Statistics facet
                    nb += queryResult.getFacetsArray().get(0).getStatistics().getCount();
                } else {
                    // Categories frequency facet
                    for (int i = 0; i < queryResult.getFacetsArray().get(0).getFrequenciesArray().length(); i++) {
                        nb += queryResult.getFacetsArray().get(0).getFrequenciesArray().get(i).getCount();
                    }
                }
            }
        }
        return nb;
    }

    private void addRadioButtons(int noEmpty) {
        // All, Empty, Not Empty radio buttons
        RadioButton radioAll = getRadioButtonResetSpecific(translations.criterionFiltersMap().get("all"),
                queryResult == null ? null : queryResult.getTotalHits());
        radioAll.setValue(true);
        radioControls.add(radioAll);

        radioControls.add(getRadioButtonResetSpecific(translations.criterionFiltersMap().get("empty"),
                queryResult == null ? null : queryResult.getTotalHits() - noEmpty));
        radioControls.add(getRadioButtonResetSpecific(translations.criterionFiltersMap().get("not_empty"),
                queryResult == null ? null : noEmpty));
        add(radioControls);
    }

    private RadioButton getRadioButtonResetSpecific(String label, Integer count) {
        RadioButton radio = getRadioButton(label, count);
        radio.addClickHandler(new ClickHandler() {
            @Override
            public void onClick(ClickEvent event) {
                resetSpecificControls();
            }
        });
        return radio;
    }

    protected RadioButton getRadioButton(final String label, Integer count) {
        SafeHtmlBuilder builder = new SafeHtmlBuilder().appendEscaped(label);

        if (count != null) {
            builder.appendHtmlConstant("<span style=\"font-size:x-small\"> (").append(count).appendEscaped(")")
                    .appendHtmlConstant("</span>");
        }

        RadioButton radio = new RadioButton(fieldName + "-radio-" + this.groupId, builder.toSafeHtml());

        radio.addClickHandler(new ClickHandler() {
            @Override
            public void onClick(ClickEvent event) {
                updateCriterionFilter(label);
            }
        });

        return radio;
    }

    protected void updateCriterionFilter(String filter) {
        setText(filter.isEmpty() ? variable.getName() : variable.getName() + ": " + filter);
    }

    protected abstract Widget getSpecificControls();

    protected abstract void resetSpecificControls();

    public abstract void doFilterValueSets();

    public String getQueryString() {
        if (((CheckBox) radioControls.getWidget(0)).getValue()) {
            // All: No filter is necessary
            return "";
        }
        if (((CheckBox) radioControls.getWidget(1)).getValue()) {
            // Not empty
            return "_missing_:" + fieldName;
        }
        if (((CheckBox) radioControls.getWidget(2)).getValue()) {
            // Empty
            return "_exists_:" + fieldName;
        }

        return null;
    }

    @Override
    protected void onLoad() {
        super.onLoad();
        if (getTriggerWidget() != null) {
            bind(getTriggerWidget().getElement());
        }
    }

    // TODO: Find the selector that allows to skip the selection of the first input after the li of chosen options...
    private static native void bind(Element e) /*-{
                                               $wnd.jQuery(e).next().find('label, li').click(function (w) {
                                               w.stopPropagation();
                                               });
                                                   
                                               $wnd.jQuery(e).next().find('input').not('input[autocomplete]').click(function (w) {
                                               w.stopPropagation();
                                               });
                                               }-*/;
}