/*

 * Copyright (c) 2006, 2012, Oracle and/or its affiliates. All rights reserved.

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.  Oracle designates this

 * particular file as subject to the "Classpath" exception as provided

 * by Oracle in the LICENSE file that accompanied this code.

 *

 * This code 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

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

 * or visit www.oracle.com if you need additional information or have any

 * questions.

 */

package sun.tools.jconsole;

import java.awt.*;

import java.util.ArrayList;

import javax.swing.*;

import javax.swing.border.*;

@SuppressWarnings("serial")

class OverviewTab extends Tab {

    JPanel gridPanel;

    TimeComboBox timeComboBox;

    public static String getTabName() {

        return Messages.OVERVIEW;

    }

    public OverviewTab(VMPanel vmPanel) {

        super(vmPanel, getTabName());

        setBorder(new EmptyBorder(4, 4, 3, 4));

        setLayout(new BorderLayout());

        JPanel topPanel     = new JPanel(new BorderLayout());

        add(topPanel, BorderLayout.NORTH);

        JPanel controlPanel = new JPanel(new FlowLayout(FlowLayout.CENTER, 20, 5));

        topPanel.add(controlPanel, BorderLayout.CENTER);

        timeComboBox = new TimeComboBox();

        LabeledComponent lc = new LabeledComponent(Messages.TIME_RANGE_COLON,

                                                   Resources.getMnemonicInt(Messages.TIME_RANGE_COLON),

                                                   timeComboBox);

        controlPanel.add(lc);

        gridPanel = new JPanel(new AutoGridLayout(10, 6));

        gridPanel.setBorder(null);

        JScrollPane sp = new JScrollPane(gridPanel);

        sp.setBorder(null);

        sp.setViewportBorder(null);

        add(sp, BorderLayout.CENTER);

        // Note that panels are added on first update

    }

    public SwingWorker<?, ?> newSwingWorker() {

        return new SwingWorker<Object, Object>() {

            public Object doInBackground() {

                return null;

            }

            protected void done() {

                if (gridPanel.getComponentCount() == 0) {

                    final ArrayList<Plotter> plotters = new ArrayList<Plotter>();

                    for (Tab tab : vmPanel.getTabs()) {

                        OverviewPanel[] ops = tab.getOverviewPanels();

                        if (ops != null) {

                            for (OverviewPanel op : ops) {

                                gridPanel.add(op);

                                Plotter plotter = op.getPlotter();

                                if (plotter != null) {

                                    plotters.add(plotter);

                                    timeComboBox.addPlotter(plotter);

                                }

                            }

                        }

                    }

                    if (plotters.size() > 0) {

                        workerAdd(new Runnable() {

                            public void run() {

                                ProxyClient proxyClient = vmPanel.getProxyClient();

                                for (Plotter plotter : plotters) {

                                    proxyClient.addWeakPropertyChangeListener(plotter);

                                }

                            }

                        });

                    }

                    if (getParent() instanceof JTabbedPane) {

                        Utilities.updateTransparency((JTabbedPane)getParent());

                    }

                }

            }

        };

    }

    private class AutoGridLayout extends GridLayout {

        public AutoGridLayout(int hGap, int vGap) {

            super(0, 1, hGap, vGap);

        }

        public Dimension preferredLayoutSize(Container parent) {

            return minimumLayoutSize(parent);

        }

        public Dimension minimumLayoutSize(Container parent) {

            updateColumns(parent);

            return super.minimumLayoutSize(parent);

        }

        private void updateColumns(Container parent) {

            // Use the outer panel width, not the scrolling gridPanel

            int parentWidth = OverviewTab.this.getWidth();

            int columnWidth = 1;

            for (Component c : parent.getComponents()) {

                columnWidth = Math.max(columnWidth, c.getPreferredSize().width);

            }

            int n = parent.getComponentCount();

            int maxCols = Math.min(n, parentWidth / columnWidth);

            for (int columns = maxCols; columns >= 1; columns--) {

                if (columns == 1) {

                    setColumns(maxCols);

                } else if ((n % columns) == 0) {

                    setColumns(columns);

                    break;

                }

            }

        }

    }

}