/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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 org.apache.isis.viewer.dnd.field;
import java.awt.Image;
import java.awt.MediaTracker;
import java.awt.datatransfer.Clipboard;
import java.awt.datatransfer.DataFlavor;
import java.awt.datatransfer.Transferable;
import java.awt.event.InputEvent;
import java.awt.event.KeyEvent;
import java.io.File;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.apache.isis.core.commons.exceptions.IsisException;
import org.apache.isis.core.metamodel.adapter.ObjectAdapter;
import org.apache.isis.core.progmodel.facets.value.image.ImageValueFacet;
import org.apache.isis.viewer.dnd.drawing.Canvas;
import org.apache.isis.viewer.dnd.drawing.Color;
import org.apache.isis.viewer.dnd.drawing.ColorsAndFonts;
import org.apache.isis.viewer.dnd.drawing.Location;
import org.apache.isis.viewer.dnd.drawing.Size;
import org.apache.isis.viewer.dnd.view.Axes;
import org.apache.isis.viewer.dnd.view.Content;
import org.apache.isis.viewer.dnd.view.KeyboardAction;
import org.apache.isis.viewer.dnd.view.Toolkit;
import org.apache.isis.viewer.dnd.view.UserActionSet;
import org.apache.isis.viewer.dnd.view.View;
import org.apache.isis.viewer.dnd.view.ViewConstants;
import org.apache.isis.viewer.dnd.view.ViewRequirement;
import org.apache.isis.viewer.dnd.view.ViewSpecification;
import org.apache.isis.viewer.dnd.view.Workspace;
import org.apache.isis.viewer.dnd.view.base.AbstractFieldSpecification;
import org.apache.isis.viewer.dnd.view.base.AwtImage;
import org.apache.isis.viewer.dnd.view.content.FieldContent;
import org.apache.isis.viewer.dnd.view.field.OneToOneField;
import org.apache.isis.viewer.dnd.view.option.UserActionAbstract;
public class ImageField extends AbstractField {
public static class Specification extends AbstractFieldSpecification {
@Override
public boolean canDisplay(final ViewRequirement requirement) {
return requirement.isForValueType(ImageValueFacet.class);
}
@Override
public View createView(final Content content, final Axes axes, final int sequence) {
return new ImageField(content, this);
}
@Override
public String getName() {
return "Image";
}
}
private static final Logger LOG = LoggerFactory.getLogger(ImageField.class);
private static final MediaTracker mt = new MediaTracker(new java.awt.Canvas());
public ImageField(final Content content, final ViewSpecification specification) {
super(content, specification);
}
@Override
public boolean canFocus() {
return true;
}
@Override
public void contentMenuOptions(final UserActionSet options) {
super.contentMenuOptions(options);
options.add(new UserActionAbstract("Load image from file...") {
@Override
public void execute(final Workspace workspace, final View view, final Location at) {
final String file = getViewManager().selectFilePath("Load image", ".");
if (new File(file).exists()) {
loadImageFromFile(file);
}
}
});
}
private void copy() {
}
@Override
public void draw(final Canvas canvas) {
Color color;
if (hasFocus()) {
color = Toolkit.getColor(ColorsAndFonts.COLOR_PRIMARY1);
} else if (getParent().getState().isObjectIdentified()) {
color = Toolkit.getColor(ColorsAndFonts.COLOR_IDENTIFIED);
} else if (getParent().getState().isRootViewIdentified()) {
color = Toolkit.getColor(ColorsAndFonts.COLOR_PRIMARY2);
} else {
color = Toolkit.getColor(ColorsAndFonts.COLOR_SECONDARY1);
}
int top = 0;
int left = 0;
final Size size = getSize();
int w = size.getWidth() - 1;
int h = size.getHeight() - 1;
canvas.drawRectangle(left, top, w, h, color);
left++;
top++;
w -= 1;
h -= 1;
final ObjectAdapter value = getContent().getAdapter();
if (value != null) {
final ImageValueFacet facet = value.getSpecification().getFacet(ImageValueFacet.class);
final java.awt.Image image = facet.getImage(value);
if (image != null) {
final Size imageSize = new Size(facet.getWidth(value), facet.getHeight(value));
if (imageSize.getWidth() <= w && imageSize.getHeight() <= h) {
canvas.drawImage(new AwtImage(image), left, top);
} else {
canvas.drawImage(new AwtImage(image), left, top, w, h);
}
}
}
}
@Override
public int getBaseline() {
return ViewConstants.VPADDING + Toolkit.getText(ColorsAndFonts.TEXT_NORMAL).getAscent();
}
@Override
public Size getRequiredSize(final Size availableSpace) {
final ObjectAdapter value = getContent().getAdapter();
if (value == null) {
return super.getRequiredSize(availableSpace);
} else {
final ImageValueFacet facet = value.getSpecification().getFacet(ImageValueFacet.class);
final int width = Math.min(120, Math.max(32, facet.getWidth(value)));
final int height = Math.min(120, Math.max(32, facet.getHeight(value)));
return new Size(width, height);
}
}
@Override
public void keyPressed(final KeyboardAction key) {
if (canChangeValue().isVetoed()) {
return;
}
final int keyCode = key.getKeyCode();
if (keyCode == KeyEvent.VK_CONTROL || keyCode == KeyEvent.VK_SHIFT || keyCode == KeyEvent.VK_ALT) {
return;
}
final int modifiers = key.getModifiers();
final boolean ctrl = (modifiers & InputEvent.CTRL_MASK) > 0;
switch (keyCode) {
case KeyEvent.VK_V:
if (ctrl) {
key.consume();
pasteFromClipboard();
}
break;
case KeyEvent.VK_C:
if (ctrl) {
key.consume();
copy();
}
break;
}
}
private void loadImage(final Image image) {
mt.addImage(image, 1);
try {
mt.waitForAll();
} catch (final InterruptedException e) {
throw new IsisException(e);
}
// final ObjectAdapter value = getContent().getAdapter();
final ImageValueFacet facet = ((FieldContent) getContent()).getSpecification().getFacet(ImageValueFacet.class);
final ObjectAdapter object = facet.createValue(image);
((OneToOneField) getContent()).setObject(object);
// ((TextParseableField) getContent()).entryComplete();
invalidateLayout();
}
/*
* private void loadImageFromURL(final String filename) { try { final URL
* url = new URL("file://" + filename); final Image image =
* java.awt.Toolkit.getDefaultToolkit().getImage(url); loadImage(image); }
* catch (final MalformedURLException e) { throw new
* IsisException("Failed to load image from " + filename); } }
*/
private void loadImageFromFile(final String filename) {
final Image image = java.awt.Toolkit.getDefaultToolkit().getImage(filename);
loadImage(image);
}
@Override
protected void pasteFromClipboard() {
final Clipboard cb = java.awt.Toolkit.getDefaultToolkit().getSystemClipboard();
final Transferable content = cb.getContents(this);
try {
if (content.isDataFlavorSupported(DataFlavor.stringFlavor)) {
// treat a string as a file
final String filename = (String) content.getTransferData(DataFlavor.stringFlavor);
LOG.debug("pasted image from " + filename);
loadImageFromFile("file://" + filename);
} else {
LOG.info("unsupported paste operation " + content);
// note java does not support transferring images from the
// clipboard
// although it has an image flavor for it !!?
/*
* DataFlavor[] transferDataFlavors =
* content.getTransferDataFlavors(); for (int i = 0; i <
* transferDataFlavors.length; i++) {
* LOG.debug("data transfer as " +
* transferDataFlavors[i].getMimeType()); }
*
* Image image = (Image)
* content.getTransferData(DataFlavor.imageFlavor);
* LOG.debug("pasted " + image);
*/
}
} catch (final Throwable e) {
LOG.error("invalid paste operation " + e);
}
}
@Override
protected void save() {
}
}