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Cobra is the rendering engine designed for LoboBrowser
/*
GNU LESSER GENERAL PUBLIC LICENSE
Copyright (C) 2006 The Lobo Project
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
Contact info: [email protected]
*/
package org.cobraparser.util.gui;
import java.awt.BasicStroke;
import java.awt.Frame;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.event.ActionListener;
import java.awt.event.KeyEvent;
import javax.swing.JComponent;
import javax.swing.JDialog;
import javax.swing.KeyStroke;
public class GUITasks {
public static Frame getTopFrame() {
final Frame[] frames = Frame.getFrames();
for (final Frame frame : frames) {
if (frame.getFocusOwner() != null) {
return frame;
}
}
if (frames.length > 0) {
return frames[0];
}
return null;
}
public static void drawDashed(final Graphics g, int x1, int y1, int x2, int y2, final int dashSize, final int gapSize) {
if (x2 < x1) {
final int temp = x1;
x1 = x2;
x2 = temp;
}
if (y2 < y1) {
final int temp = y1;
y1 = y2;
y2 = temp;
}
final int totalDash = dashSize + gapSize;
if (y1 == y2) {
final int virtualStartX = (x1 / totalDash) * totalDash;
for (int x = virtualStartX; x < x2; x += totalDash) {
int topX = x + dashSize;
if (topX > x2) {
topX = x2;
}
int firstX = x;
if (firstX < x1) {
firstX = x1;
}
if (firstX < topX) {
g.drawLine(firstX, y1, topX, y1);
}
}
} else if (x1 == x2) {
final int virtualStartY = (y1 / totalDash) * totalDash;
for (int y = virtualStartY; y < y2; y += totalDash) {
int topY = y + dashSize;
if (topY > y2) {
topY = y2;
}
int firstY = y;
if (firstY < y1) {
firstY = y1;
}
if (firstY < topY) {
g.drawLine(x1, firstY, x1, topY);
}
}
} else {
// Not supported
g.drawLine(x1, y1, x2, y2);
}
}
public static void drawDotted(final Graphics g, final int x1, final int y1, final int x2, final int y2, final float width) {
final Graphics ng = g.create();
try {
final Graphics2D g2d = (Graphics2D) ng.create();
final float dot = Math.max(2f, width);
final float[] dotPattern = { dot };
final BasicStroke stroke = new BasicStroke(width, BasicStroke.CAP_BUTT, BasicStroke.JOIN_BEVEL, 2.0f, dotPattern, 0.0f);
g2d.setStroke(stroke);
g2d.drawLine(x1, y1, x2, y2);
} finally {
ng.dispose();
}
}
// As per this http://stackoverflow.com/a/661244/161257
public static void addEscapeListener(final JDialog dialog) {
final ActionListener escListener = e -> {
dialog.setVisible(false);
dialog.dispose();
};
dialog.getRootPane().registerKeyboardAction(escListener,
KeyStroke.getKeyStroke(KeyEvent.VK_ESCAPE, 0),
JComponent.WHEN_IN_FOCUSED_WINDOW);
}
}