es.gob.afirma.standalone.ui.pdf.PageLabel Maven / Gradle / Ivy
/* Copyright (C) 2011 [Gobierno de Espana]
* This file is part of "Cliente @Firma".
* "Cliente @Firma" 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;
* either version 2 of the License, or (at your option) any later version.
* - or The European Software License; either version 1.1 or (at your option) any later version.
* You may contact the copyright holder at: [email protected]
*/
package es.gob.afirma.standalone.ui.pdf;
import java.awt.AlphaComposite;
import java.awt.Color;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.GraphicsConfiguration;
import java.awt.GraphicsEnvironment;
import java.awt.Image;
import java.awt.Point;
import java.awt.Rectangle;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.awt.geom.Area;
import java.lang.reflect.Method;
import java.util.EventListener;
import java.util.Properties;
import java.util.logging.Logger;
import javax.swing.ImageIcon;
import javax.swing.JLabel;
import javax.swing.SwingUtilities;
import es.gob.afirma.signers.pades.PdfExtraParams;
final class PageLabel extends JLabel {
static interface PageLabelListener extends EventListener {
void selectionAvailable(Properties p);
void setX(String x);
void setY(String y);
}
private static final long serialVersionUID = 4917110251831788580L;
private static boolean TRANSLUCENCY_CAPABLE;
static {
final GraphicsConfiguration config = GraphicsEnvironment.getLocalGraphicsEnvironment().getDefaultScreenDevice().getDefaultConfiguration();
// Compatibilidad con Java 9
try {
final Method isTranslucencyCapableMethod = GraphicsConfiguration.class.getMethod("isTranslucencyCapable"); //$NON-NLS-1$
TRANSLUCENCY_CAPABLE = ((Boolean) isTranslucencyCapableMethod.invoke(config)).booleanValue();
}
catch (final Exception e) {
// Compatibilidad con Java 8 y anteriores
try {
final Class awtUtilitiesClass = Class.forName("com.sun.awt.AWTUtilities"); //$NON-NLS-1$
final Method isTranslucencyCapableMethod = awtUtilitiesClass.getMethod("isTranslucencyCapable", GraphicsConfiguration.class); //$NON-NLS-1$
TRANSLUCENCY_CAPABLE = ((Boolean) isTranslucencyCapableMethod.invoke(null, config)).booleanValue();
}
catch(final Exception | Error e2) {
Logger.getLogger("es.gob.afirma").warning( //$NON-NLS-1$
"No ha sido posible determinar si el sistema sorporta superficies translucidas, se asume que si: " + e //$NON-NLS-1$
);
TRANSLUCENCY_CAPABLE = true;
}
}
}
private static final int TRANSPARENCY_LEVEL = 3;
private final PageLabelListener listener;
PageLabelListener getPageLabelListener() {
return this.listener;
}
private final float scale;
private Properties toPdfPosition(final Rectangle original) {
final int height = original.height + original.y > getHeight() ? getHeight() - original.y : original.height;
final int width = original.width + original.x > getWidth() ? getWidth() - original.x : original.width;
final Properties extraParams = new Properties();
extraParams.put(
PdfExtraParams.SIGNATURE_POSITION_ON_PAGE_LOWER_LEFTX,
Integer.toString(
Math.round(
original.x * this.scale
)
)
);
extraParams.put(
PdfExtraParams.SIGNATURE_POSITION_ON_PAGE_LOWER_LEFTY,
Integer.toString(
Math.round(
(getHeight() - original.y - height) * this.scale
)
)
);
extraParams.put(
PdfExtraParams.SIGNATURE_POSITION_ON_PAGE_UPPER_RIGHTX,
Integer.toString(
Math.round(
(original.x + width) * this.scale
)
)
);
extraParams.put(
PdfExtraParams.SIGNATURE_POSITION_ON_PAGE_UPPER_RIGHTY,
Integer.toString(
Math.round(
(getHeight() - original.y) * this.scale
)
)
);
return extraParams;
}
private Rectangle selectionBounds = null;
void setSelectionBounds(final Rectangle r) {
this.selectionBounds = r;
this.listener.selectionAvailable(r != null ? toPdfPosition(r) : null);
}
Rectangle getSelectionBounds() {
return this.selectionBounds = null;
}
private Point clickPoint;
Point getClickPoint() {
return this.clickPoint;
}
void setClickPoint(final Point p) {
this.clickPoint = p;
}
PageLabel(final Image image,
final int width,
final int height,
final PageLabelListener pll,
final float scaleFactor) {
super(new ImageIcon(image));
if (pll == null) {
throw new IllegalArgumentException();
}
this.listener = pll;
Logger.getLogger("es.gob.afirma").info( //$NON-NLS-1$
"Factor de escala de las paginas: " + scaleFactor //$NON-NLS-1$
);
this.scale = scaleFactor;
setSize(width, height);
setCursor(new java.awt.Cursor(java.awt.Cursor.CROSSHAIR_CURSOR));
final MouseAdapter ma = new MouseAdapter() {
@Override
public void mouseClicked(final MouseEvent e) {
if (SwingUtilities.isLeftMouseButton(e) && e.getClickCount() == 2) {
System.exit(0);
}
}
@Override
public void mousePressed(final MouseEvent e) {
setClickPoint(e.getPoint());
setSelectionBounds(null);
repaint();
}
@Override
public void mouseReleased(final MouseEvent e) {
setClickPoint(null);
}
@Override
public void mouseDragged(final MouseEvent e) {
if (getClickPoint() != null) {
final Point dragPoint = e.getPoint();
final int x = Math.min(getClickPoint().x, dragPoint.x);
final int y = Math.min(getClickPoint().y, dragPoint.y);
final int rWidth = Math.max(getClickPoint().x - dragPoint.x, dragPoint.x - getClickPoint().x);
final int rHeight = Math.max(getClickPoint().y - dragPoint.y, dragPoint.y - getClickPoint().y);
setSelectionBounds(new Rectangle(x, y, rWidth, rHeight));
repaint();
}
setPositionValues(e.getX(), e.getY());
}
@Override
public void mouseMoved(final MouseEvent e) {
setPositionValues(e.getX(), e.getY());
}
@Override
public void mouseExited(final MouseEvent e) {
getPageLabelListener().setX(""); //$NON-NLS-1$
getPageLabelListener().setY(""); //$NON-NLS-1$
}
};
addMouseListener(ma);
addMouseMotionListener(ma);
}
void setPositionValues(final int x, final int y) {
getPageLabelListener().setX(
Integer.toString(
Math.round(
(x < getWidth() ? x : getWidth()) / this.scale
)
)
);
getPageLabelListener().setY(
Integer.toString(
Math.round(
(y < getHeight() ? y : getHeight()) / this.scale
)
)
);
}
@Override
public void paintComponent(final Graphics g) {
super.paintComponent(g);
final Graphics2D g2d = (Graphics2D) g.create();
g2d.setColor(new Color(255, 255, 255, 128));
final Area fill = new Area(new Rectangle(new Point(0, 0), getSize()));
if (this.selectionBounds != null) {
fill.subtract(new Area(this.selectionBounds));
}
g2d.fill(fill);
if (this.selectionBounds != null) {
g2d.setColor(Color.BLUE);
if (TRANSLUCENCY_CAPABLE) {
g2d.setComposite(
AlphaComposite.getInstance(
AlphaComposite.SRC_OVER,TRANSPARENCY_LEVEL * 0.1f
)
);
}
g2d.fill(this.selectionBounds);
}
g2d.dispose();
}
}