se.trixon.pacoma.ui.PagePanel.java Source code

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Here is the source code for se.trixon.pacoma.ui.PagePanel.java

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/*
 * Copyright 2017 Patrik Karlsson.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package se.trixon.pacoma.ui;

import java.awt.Dimension;
import java.awt.datatransfer.DataFlavor;
import java.awt.datatransfer.UnsupportedFlavorException;
import java.awt.dnd.DnDConstants;
import java.awt.dnd.DropTarget;
import java.awt.dnd.DropTargetDropEvent;
import java.io.File;
import java.io.IOException;
import java.util.LinkedList;
import java.util.List;
import java.util.Locale;
import org.apache.commons.io.FilenameUtils;
import se.trixon.almond.util.Scaler;
import se.trixon.pacoma.collage.Collage;

/**
 *
 * @author Patrik Karlsson
 */
public class PagePanel extends javax.swing.JPanel {

    private Collage mCollage;
    private DropTarget mDropTarget;

    /**
     * Creates new form PagePanel
     */
    public PagePanel() {
        initComponents();
        init();
    }

    void open(Collage collage) {
        mCollage = collage;
        setBackground(mCollage.getBorderColor());
        resize();

        mCollage.addPropertyChangeListener(() -> {
            setBackground(mCollage.getBorderColor());
            resize();
            repaint();
            revalidate();
        });
    }

    private void init() {
        mDropTarget = new DropTarget() {
            @Override
            public synchronized void drop(DropTargetDropEvent evt) {
                try {
                    evt.acceptDrop(DnDConstants.ACTION_COPY);
                    LinkedList<File> droppedFiles = new LinkedList<>(
                            (List<File>) evt.getTransferable().getTransferData(DataFlavor.javaFileListFlavor));
                    List<File> invalidFiles = new LinkedList<>();

                    droppedFiles.forEach((droppedFile) -> {
                        if (droppedFile.isFile()
                                && FilenameUtils.isExtension(droppedFile.getName().toLowerCase(Locale.getDefault()),
                                        new String[] { "jpg", "jpeg", "png" })) {
                            //all ok
                        } else {
                            invalidFiles.add(droppedFile);
                        }
                    });

                    invalidFiles.forEach((invalidFile) -> {
                        droppedFiles.remove(invalidFile);
                        System.out.println("remomve invalid file: " + invalidFile.getAbsolutePath());
                    });

                    droppedFiles.forEach((droppedFile) -> {
                        System.out.println("accept: " + droppedFile.getAbsolutePath());
                    });

                    mCollage.addFiles(droppedFiles);
                } catch (UnsupportedFlavorException | IOException ex) {
                    System.err.println(ex.getMessage());
                }
            }
        };

        setDropTarget(mDropTarget);
    }

    private void resize() {
        int collageW = mCollage.getWidth();
        int collageH = mCollage.getHeight();
        Dimension collageDimension = new Dimension(collageW, collageH);

        Scaler scaler = new Scaler(collageDimension);

        int parentW = getParent().getWidth();
        int parentH = getParent().getHeight();
        final int MARGIN = 40;
        scaler.setHeight(parentH - MARGIN);
        scaler.setWidth(parentW - MARGIN);

        Dimension scaledDimension = scaler.getDimension();
        setMaximumSize(collageDimension);
        setPreferredSize(scaledDimension);
    }

    /**
     * This method is called from within the constructor to initialize the form. WARNING: Do NOT
     * modify this code. The content of this method is always regenerated by the Form Editor.
     */
    @SuppressWarnings("unchecked")
    // <editor-fold defaultstate="collapsed" desc="Generated Code">//GEN-BEGIN:initComponents
    private void initComponents() {

        setMinimumSize(new java.awt.Dimension(100, 100));
        addHierarchyBoundsListener(new java.awt.event.HierarchyBoundsListener() {
            public void ancestorMoved(java.awt.event.HierarchyEvent evt) {
            }

            public void ancestorResized(java.awt.event.HierarchyEvent evt) {
                formAncestorResized(evt);
            }
        });

        javax.swing.GroupLayout layout = new javax.swing.GroupLayout(this);
        this.setLayout(layout);
        layout.setHorizontalGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING).addGap(0,
                335, Short.MAX_VALUE));
        layout.setVerticalGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING).addGap(0, 124,
                Short.MAX_VALUE));
    }// </editor-fold>//GEN-END:initComponents

    private void formAncestorResized(java.awt.event.HierarchyEvent evt) {//GEN-FIRST:event_formAncestorResized
        if (isVisible()) {
            resize();
        }
    }//GEN-LAST:event_formAncestorResized

    // Variables declaration - do not modify//GEN-BEGIN:variables
    // End of variables declaration//GEN-END:variables
}