com.skysql.manager.ui.MonitorsLayout.java Source code

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Here is the source code for com.skysql.manager.ui.MonitorsLayout.java

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/*
 * This file is distributed as part of the MariaDB Manager.  It 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,
 * version 2.
 *
 * 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., 51
 * Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Copyright 2012-2014 SkySQL Corporation Ab
 */

package com.skysql.manager.ui;

import java.util.ArrayList;
import java.util.LinkedHashMap;

import com.skysql.manager.MonitorRecord;
import com.skysql.manager.api.Monitors;
import com.vaadin.data.Property.ValueChangeEvent;
import com.vaadin.data.Property.ValueChangeListener;
import com.vaadin.ui.Button;
import com.vaadin.ui.Button.ClickEvent;
import com.vaadin.ui.ComboBox;
import com.vaadin.ui.Component;
import com.vaadin.ui.HorizontalLayout;
import com.vaadin.ui.Label;
import com.vaadin.ui.VerticalLayout;

/**
 * The Class MonitorsLayout is used to build the left hand-side of the Monitors to Chart mappings dialog.
 */
public class MonitorsLayout extends VerticalLayout {

    private static final long serialVersionUID = 0x4C656F6E6172646FL;

    private int componentIndex;
    private ChartPreviewLayout chartPreviewLayout;
    private LinkedHashMap<String, MonitorRecord> availableMonitors;
    private ArrayList<String> selectedMonitorIDs;
    private ArrayList<ComboBox> selectMonitorList;

    /** The monitor select listener. */
    private ValueChangeListener monitorSelectListener = new ValueChangeListener() {
        private static final long serialVersionUID = 0x4C656F6E6172646FL;

        public void valueChange(ValueChangeEvent event) {

            refreshMonitors();
        }
    };

    /**
     * Instantiates a new monitors layout.
     *
     * @param selectedMonitorIDs the selected monitor IDs
     */
    public MonitorsLayout(ArrayList<String> selectedMonitorIDs) {
        this.selectedMonitorIDs = selectedMonitorIDs;

        addStyleName("MonitorsLayout");
        setSpacing(true);
        setMargin(true);

        Monitors.reloadMonitors();
        availableMonitors = Monitors.getMonitorsList();
        initializeMonitors();

    }

    /**
     * Initialize monitors list.
     */
    public void initializeMonitors() {

        final Label monitorsLabel = new Label("Select Monitors");
        monitorsLabel.setStyleName("dialogLabel");
        addComponent(monitorsLabel);

        componentIndex = getComponentCount(); // where the monitors start
        selectMonitorList = new ArrayList<ComboBox>();
        for (String monitorID : selectedMonitorIDs) {
            addComponent(addRow(monitorID));
        }

        final Button addButton = new Button("Add");
        addComponent(addButton);
        addButton.addClickListener(new Button.ClickListener() {
            private static final long serialVersionUID = 0x4C656F6E6172646FL;

            public void buttonClick(ClickEvent event) {
                Component newRow = addRow(null);
                replaceComponent(addButton, newRow);
                addComponent(addButton);
            }
        });

    }

    /**
     * Adds the chart preview.
     *
     * @param chartPreviewLayout the chart preview layout
     */
    public void addChartPreview(ChartPreviewLayout chartPreviewLayout) {
        this.chartPreviewLayout = chartPreviewLayout;
    }

    /**
     * Refresh monitors.
     */
    private void refreshMonitors() {

        selectedMonitorIDs.clear();
        for (ComboBox select : selectMonitorList) {
            String monitorID = (String) select.getValue();
            selectedMonitorIDs.add(monitorID);
        }
        chartPreviewLayout.refreshUserChart();
        chartPreviewLayout.refreshChart();

    }

    /**
     * Adds a new monitor row.
     *
     * @param monitorID the monitor id
     * @return the component
     */
    private Component addRow(String monitorID) {
        HorizontalLayout row = new HorizontalLayout();
        ComboBox selectMonitor = new ComboBox();
        for (MonitorRecord availMonitor : availableMonitors.values()) {
            selectMonitor.addItem(availMonitor.getID());
            selectMonitor.setItemCaption(availMonitor.getID(), availMonitor.getName());
        }
        row.addComponent(selectMonitor);
        selectMonitorList.add(selectMonitor);

        selectMonitor.setValue(monitorID);
        selectMonitor.setNullSelectionAllowed(false);
        selectMonitor.setImmediate(true);
        selectMonitor.addValueChangeListener(monitorSelectListener);

        if (getComponentCount() > componentIndex) {
            Button deleteButton = new Button("X");
            row.addComponent(deleteButton);
            deleteButton.setData(selectMonitor);
            deleteButton.addClickListener(new Button.ClickListener() {
                private static final long serialVersionUID = 0x4C656F6E6172646FL;

                public void buttonClick(ClickEvent event) {
                    // remove combobox from list
                    Button button = event.getButton();
                    ComboBox select = (ComboBox) button.getData();
                    selectMonitorList.remove(select);

                    // remove layout from dialog
                    int layoutIndex = getComponentIndex(button.getParent());
                    HorizontalLayout layout = (HorizontalLayout) getComponent(layoutIndex);
                    removeComponent(layout);

                    refreshMonitors();
                }
            });
        }

        focus();

        return (row);

    }
}