org.pentaho.reporting.platform.plugin.gwt.client.CheckBoxParameterUI.java Source code

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Here is the source code for org.pentaho.reporting.platform.plugin.gwt.client.CheckBoxParameterUI.java

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/*
 * This program is free software; you can redistribute it and/or modify it under the 
 * terms of the GNU Lesser General Public License, version 2.1 as published by the Free Software 
 * Foundation.
 *
 * You should have received a copy of the GNU Lesser General Public License along with this 
 * program; if not, you can obtain a copy at http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html 
 * or from the Free Software Foundation, Inc., 
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * 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 Lesser General Public License for more details.
 *
 * Copyright 2010-2013 Pentaho Corporation.  All rights reserved.
 */

package org.pentaho.reporting.platform.plugin.gwt.client;

import java.util.ArrayList;
import java.util.List;

import com.google.gwt.event.dom.client.ClickEvent;
import com.google.gwt.event.dom.client.ClickHandler;
import com.google.gwt.user.client.ui.CellPanel;
import com.google.gwt.user.client.ui.CheckBox;
import com.google.gwt.user.client.ui.HorizontalPanel;
import com.google.gwt.user.client.ui.RadioButton;
import com.google.gwt.user.client.ui.SimplePanel;
import com.google.gwt.user.client.ui.VerticalPanel;

public class CheckBoxParameterUI extends SimplePanel implements ParameterUI {

    private class CheckBoxParameterClickHandler implements ClickHandler {
        private ParameterControllerPanel controller;
        private String parameterName;
        private String choiceValue;

        public CheckBoxParameterClickHandler(final ParameterControllerPanel controller, final String parameterName,
                final String choiceValue) {
            this.controller = controller;
            this.parameterName = parameterName;
            this.choiceValue = choiceValue;
        }

        public void onClick(final ClickEvent event) {
            final CheckBox button = (CheckBox) event.getSource();
            // if we are render radio buttons, we've got to clear the list
            // remove element if it's already there (prevent dups for checkbox)
            final ParameterValues parameterValues = controller.getParameterMap();
            parameterValues.removeSelectedValue(parameterName, choiceValue);

            if (button.getValue()) {
                parameterValues.addSelectedValue(parameterName, choiceValue);
            }
            controller.fetchParameters(ParameterControllerPanel.ParameterSubmitMode.USERINPUT);
        }
    }

    private class RadioButtonParameterClickHandler implements ClickHandler {
        private ParameterControllerPanel controller;
        private String parameterName;
        private String choiceValue;

        public RadioButtonParameterClickHandler(final ParameterControllerPanel controller,
                final String parameterName, final String choiceValue) {
            this.controller = controller;
            this.parameterName = parameterName;
            this.choiceValue = choiceValue;
        }

        public void onClick(final ClickEvent event) {
            final CheckBox button = (CheckBox) event.getSource();
            // if we are render radio buttons, we've got to clear the list
            if (button.getValue()) {
                controller.getParameterMap().setSelectedValue(parameterName, choiceValue);
            } else {
                controller.getParameterMap().setSelectedValue(parameterName, null);
            }
            controller.fetchParameters(ParameterControllerPanel.ParameterSubmitMode.USERINPUT);
        }
    }

    private ArrayList<CheckBox> buttons;

    public CheckBoxParameterUI(final ParameterControllerPanel controller, final Parameter parameterElement) {
        buttons = new ArrayList<CheckBox>();
        final String parameterName = parameterElement.getName(); //$NON-NLS-1$
        String renderType = parameterElement.getAttribute("parameter-render-type"); //$NON-NLS-1$
        if (renderType != null) {
            renderType = renderType.trim();
        }
        String layout = parameterElement.getAttribute("parameter-layout"); //$NON-NLS-1$
        if (layout != null) {
            layout = layout.trim();
        }

        // build button ui
        final CellPanel buttonPanel;
        if ("vertical".equalsIgnoreCase(layout)) //$NON-NLS-1$
        {
            buttonPanel = new VerticalPanel();
        } else {
            buttonPanel = new HorizontalPanel();
        }
        final List<ParameterSelection> selections = parameterElement.getSelections();
        for (int i = 0; i < selections.size(); i++) {
            final ParameterSelection choiceElement = selections.get(i);
            final String choiceLabel = choiceElement.getLabel(); //$NON-NLS-1$
            final String choiceValue = choiceElement.getValue(); //$NON-NLS-1$
            final CheckBox tmpButton;
            if ("checkbox".equals(renderType)) //$NON-NLS-1$
            {
                tmpButton = new CheckBox(choiceLabel);
                tmpButton
                        .addClickHandler(new CheckBoxParameterClickHandler(controller, parameterName, choiceValue));
            } else {
                tmpButton = new RadioButton(parameterName, choiceLabel);
                tmpButton.addClickHandler(
                        new RadioButtonParameterClickHandler(controller, parameterName, choiceValue));
            }
            tmpButton.setValue(choiceElement.isSelected());
            tmpButton.setTitle(choiceValue);
            // set checked based on selections list
            buttonPanel.add(tmpButton);
            buttons.add(tmpButton);
        }
        setWidget(buttonPanel);
    }

    public void setEnabled(final boolean enabled) {
        for (int i = 0; i < buttons.size(); i++) {
            final CheckBox checkBox = buttons.get(i);
            checkBox.setEnabled(enabled);
        }
    }
}