plugin-external-background/src/main/java/com/fr/plugin/external/design/ExternalImageBackgroundQuickPane.java

package com.fr.plugin.external.design;

import com.fr.base.BaseUtils;
import com.fr.base.Style;
import com.fr.design.border.UIRoundedBorder;
import com.fr.design.constants.UIConstants;
import com.fr.design.event.UIObserverListener;
import com.fr.design.gui.ibutton.UIButton;
import com.fr.design.gui.ibutton.UIButtonGroup;
import com.fr.design.layout.FRGUIPaneFactory;
import com.fr.design.mainframe.DesignerContext;
import com.fr.design.mainframe.backgroundpane.BackgroundQuickPane;
import com.fr.design.mainframe.backgroundpane.ImagePreviewPane;
import com.fr.general.Background;
import com.fr.general.GeneralUtils;
import com.fr.plugin.external.ExternalImageBackground;
import com.fr.plugin.external.ImageFileChooser;
import com.fr.plugin.external.ImageManager;
import com.fr.plugin.external.ImageUtils;
import com.fr.stable.Constants;
import com.fr.stable.CoreGraphHelper;
import com.fr.stable.StringUtils;

import javax.swing.JFileChooser;
import javax.swing.JPanel;
import javax.swing.SwingWorker;
import javax.swing.event.ChangeEvent;
import javax.swing.event.ChangeListener;
import java.awt.BorderLayout;
import java.awt.Dimension;
import java.awt.GridLayout;
import java.awt.Image;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.File;
import java.lang.reflect.Method;
import java.util.UUID;

/**
 * @author zhou
 * @since 2012-5-29下午1:12:06
 */
public class ExternalImageBackgroundQuickPane extends BackgroundQuickPane {

    private ImagePreviewPane previewPane;
    private Style imageStyle = null;
    private ChangeListener changeListener = null;
    private ImageFileChooser imageFileChooser;
    private UIButtonGroup<Byte> imageLayoutPane;
    private String cachedId;
    private SwingWorker<Void, Void> imageWorker;

    public ExternalImageBackgroundQuickPane() {
        this(true);
    }

    public ExternalImageBackgroundQuickPane(boolean hasImageLayout) {
        this.setLayout(new BorderLayout(0, 4));
        String[] nameArray = {com.fr.design.i18n.Toolkit.i18nText("Fine-Design_Basic_Background_Image_Default"), com.fr.design.i18n.Toolkit.i18nText("Fine-Design_Basic_Background_Image_Titled"), com.fr.design.i18n.Toolkit.i18nText("Fine-Design_Basic_Background_Image_Extend"), com.fr.design.i18n.Toolkit.i18nText("Fine-Design_Basic_Background_Image_Adjust")};
        Byte[] valueArray = {Constants.IMAGE_CENTER, Constants.IMAGE_TILED, Constants.IMAGE_EXTEND, Constants.IMAGE_ADJUST};
        imageLayoutPane = new UIButtonGroup<Byte>(nameArray, valueArray);
        imageLayoutPane.setSelectedIndex(0);

        previewPane = new ImagePreviewPane();
        JPanel borderPane = FRGUIPaneFactory.createBorderLayout_S_Pane();
        borderPane.setBorder(new UIRoundedBorder(UIConstants.LINE_COLOR, 1, 5));
        borderPane.setPreferredSize(new Dimension(0, 145));
        borderPane.add(previewPane, BorderLayout.CENTER);
        this.add(borderPane, BorderLayout.NORTH);
        previewPane.addChangeListener(imageSizeChangeListener);

        JPanel southPane = new JPanel(new BorderLayout(0, 4));
        JPanel contentPane = FRGUIPaneFactory.createBorderLayout_S_Pane();
        contentPane.add(southPane, BorderLayout.NORTH);
        this.add(contentPane, BorderLayout.CENTER);

        JPanel selectFilePane = new JPanel(new GridLayout(0, 2));

        UIButton selectPictureButton = new UIButton(com.fr.design.i18n.Toolkit.i18nText("Fine-Design_Report_Image_Select_Picture"));
        selectFilePane.add(new JPanel());
        selectFilePane.add(selectPictureButton);
        selectPictureButton.addActionListener(selectPictureActionListener);

        if (hasImageLayout) {
            southPane.add(imageLayoutPane, BorderLayout.CENTER);
        }
        southPane.add(selectFilePane, BorderLayout.SOUTH);

        imageLayoutPane.addChangeListener(new ChangeListener() {

            @Override
            public void stateChanged(ChangeEvent e) {
                imageStyle = Style.DEFAULT_STYLE.deriveImageLayout(imageLayoutPane.getSelectedItem());
                previewPane.setImageStyle(imageStyle);
                previewPane.repaint();
            }
        });
    }

    /**
     * Select picture.
     */
    ActionListener selectPictureActionListener = new ActionListener() {

        public void actionPerformed(ActionEvent evt) {
            if (imageFileChooser == null) {
                String compressText = com.fr.design.i18n.Toolkit.i18nText("Fine-Design_Basic_Image_Compress");
                try {
                    GeneralUtils.classForName("com.fr.design.utils.ImageUtils");
                } catch (ClassNotFoundException e) {
                    compressText = StringUtils.EMPTY;
                }
                imageFileChooser = new ImageFileChooser(compressText);
                imageFileChooser.setMultiSelectionEnabled(false);
            }
            int returnVal = imageFileChooser.showOpenDialog(DesignerContext.getDesignerFrame());
            if (returnVal != JFileChooser.CANCEL_OPTION) {
                final File selectedFile = imageFileChooser.getSelectedFile();

                if (selectedFile != null && selectedFile.isFile()) {
                    if (previewPane != null) {
                        Class<?> cls = null;
                        try {
                            cls = Class.forName("com.fr.design.mainframe.backgroundpane.ImagePreviewPane");
                            Method loading = cls.getMethod("showLoading");
                            loading.invoke(previewPane);
                        } catch (Exception ignore) {

                        }
                    }
                    if (imageWorker != null && !imageWorker.isDone()) {
                        imageWorker = null;
                    }
                    imageWorker = new SwingWorker<Void, Void>() {
                        @Override
                        protected Void doInBackground() throws Exception {
                            Image image = imageFileChooser.isCompressSelected() ? ImageUtils.defaultImageCompress(selectedFile) : BaseUtils.readImage(selectedFile.getPath());
                            CoreGraphHelper.waitForImage(image);
                            if (cachedId == null) {
                                cachedId = UUID.randomUUID().toString();
                            }
                            previewPane.setImage(image);
                            imageStyle = Style.DEFAULT_STYLE.deriveImageLayout(imageLayoutPane.getSelectedItem());
                            previewPane.setImageStyle(imageStyle);
                            previewPane.repaint();
                            fireChagneListener();
                            return null;
                        }
                    };
                    imageWorker.execute();
                } else {
                    previewPane.setImage(null);
                }
            }

        }
    };

    public void populateBean(Background background) {
        ExternalImageBackground imageBackground = (ExternalImageBackground) background;
        this.cachedId = imageBackground.getId();
        imageLayoutPane.setSelectedItem((byte) imageBackground.getLayout());
        Style.DEFAULT_STYLE.deriveImageLayout(imageBackground.getLayout());

        previewPane.setImageStyle(ExternalImageBackgroundQuickPane.this.imageStyle);
        previewPane.setImage(imageBackground.getImage());
        previewPane.repaint();
    }

    public Background updateBean() {
        ExternalImageBackground imageBackground = new ExternalImageBackground(previewPane.getImage(), this.cachedId);
        imageStyle = Style.DEFAULT_STYLE.deriveImageLayout(imageLayoutPane.getSelectedItem());
        imageBackground.setLayout(imageStyle.getImageLayout());
        if (this.cachedId != null) {
            ImageManager.getInstance().updateImage(imageBackground);
        }
        return imageBackground;
    }

    /**
     * 给组件登记一个观察者监听事件
     *
     * @param listener 观察者监听事件
     */
    public void registerChangeListener(final UIObserverListener listener) {
        changeListener = new ChangeListener() {
            public void stateChanged(ChangeEvent e) {
                listener.doChange();
            }
        };
        imageLayoutPane.addChangeListener(changeListener);
    }


    private void fireChagneListener() {
        if (this.changeListener != null) {
            ChangeEvent evt = new ChangeEvent(this);
            this.changeListener.stateChanged(evt);
        }
    }

    ChangeListener imageSizeChangeListener = new ChangeListener() {

        public void stateChanged(ChangeEvent evt) {
            if (imageLayoutPane.getSelectedItem() != null) {
                imageStyle = Style.DEFAULT_STYLE.deriveImageLayout(imageLayoutPane.getSelectedItem());
                previewPane.setImageStyle(imageStyle);
                previewPane.repaint();
            }
        }
    };

    /**
     * 判断是否是图片背景
     *
     * @param background 背景
     * @return 判断是否是图片背景
     */
    public boolean accept(Background background) {
        return background instanceof ExternalImageBackground;
    }

    /**
     * 标题
     *
     * @return 标题
     */
    public String title4PopupWindow() {
        return "外置图片";
    }

    public void reset() {
        this.cachedId = null;
        imageLayoutPane.setSelectedIndex(0);
        previewPane.setImage(null);
    }

}