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/*
* Copyright (c) 2006, 2016, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code 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 General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
/*
@test
@key headful
@bug 4370316
@summary GridLayout does not centre its component properly
(summary was GridLayout does not fill its Container)
@library ../../regtesthelpers
@build Util
@author Andrei Dmitriev : area=awt.layout
@run main LayoutExtraGaps
*/
import java.awt.*;
import java.awt.event.*;
import test.java.awt.regtesthelpers.Util;
public class LayoutExtraGaps extends Frame {
final static int compCount = 30;
public LayoutExtraGaps() {
super("GridLayoutTest");
Panel yellowPanel = new Panel(new GridLayout(compCount, 1, 3, 3));
yellowPanel.setBackground(Color.yellow);
for(int i = 0; i < compCount ; i++) {
Label redLabel = new Label(""+i);
redLabel.setBackground(Color.red);
yellowPanel.add(redLabel);
}
Panel bluePanel = new Panel(new GridLayout(1, compCount, 3, 3));
bluePanel.setBackground(Color.blue);
for(int i = 0; i < compCount; i++) {
Label greenLabel = new Label(""+i);
greenLabel.setBackground(Color.green);
bluePanel.add(greenLabel);
}
//RTL orientation
Panel blackPanel = new Panel(new GridLayout(compCount, 1, 3, 3));
blackPanel.setBackground(Color.black);
blackPanel.applyComponentOrientation(ComponentOrientation.RIGHT_TO_LEFT);
for(int i = 0; i < compCount ; i++) {
Label redLabel = new Label(""+i);
redLabel.setBackground(Color.red);
blackPanel.add(redLabel);
}
Panel redPanel = new Panel(new GridLayout(1, compCount, 3, 3));
redPanel.applyComponentOrientation(ComponentOrientation.RIGHT_TO_LEFT);
redPanel.setBackground(Color.red);
for(int i = 0; i < compCount; i++) {
Label greenLabel = new Label(""+i);
greenLabel.setBackground(Color.green);
redPanel.add(greenLabel);
}
setLayout(new GridLayout(2, 2, 20, 20));
add(yellowPanel);
add(bluePanel);
add(redPanel);
add(blackPanel);
pack();
setSize((int)getPreferredSize().getWidth() + 50, (int)getPreferredSize().getHeight() + 50);
setVisible(true);
Util.waitForIdle(Util.createRobot());
if (isComponentCentredLTR(yellowPanel) && isComponentCentredLTR(bluePanel)
&& isComponentCentredLTR(blackPanel) && isComponentCentredRTL(redPanel))
{
System.out.println("Test passed.");
} else {
throw new RuntimeException("Test failed. GridLayout doesn't center component.");
}
}
/**
* Checks if the components under Panel p are properly centred (i.e.
* opposite borders between the Panel and component are equal). Panel p
* must not be affect by RTL orientation (RTL only affects horizontal
* positioning and components lay out from top right corner).
*
* @param p the panel where the components exist and is not affected
* by right to left orientation
* @return true if components of panel p are properly centre, false
* otherwise
*/
public static boolean isComponentCentredLTR(Panel p) {
double borderLeft;
double borderRight;
double borderTop;
double borderBottom;
//The first component(rectangle) in panel p.
Rectangle firstRec = p.getComponent(0).getBounds();
//The last component(rectangle) in panel p.
Rectangle lastRec = p.getComponent(compCount - 1).getBounds();
System.out.println("bounds of the first rectangle in "+ p.getName() + " = " + firstRec);
System.out.println("bounds of the last rectangle in "+ p.getName() + " = " + lastRec);
borderLeft = firstRec.getX();
borderRight = p.getWidth() - lastRec.getWidth() - lastRec.getX();
borderTop = firstRec.getY();
borderBottom = p.getHeight() - lastRec.getHeight() - lastRec.getY();
return areBordersEqual(borderLeft, borderRight) &&
areBordersEqual(borderTop, borderBottom);
}
/**
* Checks if the components under Panel p are properly centred (i.e.
* opposite borders between the Panel and component are equal). Panel p
* must be affect by RTL orientation (RTL only affects horizontal positioning
* and components lay out from top right corner).
*
* @param p the panel where the components exist and is affected by
* right to left orientation
* @return true if components of panel p are properly centre, false
* otherwise
*/
public static boolean isComponentCentredRTL(Panel p) {
double borderLeft;
double borderRight;
double borderTop;
double borderBottom;
//The first component(rectangle) in panel p.
Rectangle firstRec = p.getComponent(0).getBounds();
//The last component(rectangle) in panel p.
Rectangle lastRec = p.getComponent(compCount - 1).getBounds();
System.out.println("bounds of the first rectangle in "+ p.getName() + " = " + firstRec);
System.out.println("bounds of the last rectangle in "+ p.getName() + " = " + lastRec);
borderLeft = lastRec.getX();
borderRight = p.getWidth() - firstRec.getWidth() - firstRec.getX();
borderTop = lastRec.getY();
borderBottom = p.getHeight() - firstRec.getHeight() - firstRec.getY();
return areBordersEqual(borderLeft, borderRight) &&
areBordersEqual(borderTop, borderBottom);
}
/**
* Given two borders border1 and border2 check if they are equal.
*
* @param border1 one of the borders being compared
* @param border2 the other border being compared
* @return true if border1 and border2 are equal to each other (i.e.
* their width/height difference is at most 1, assuming the
* smallest pixel is of size 1), false otherwise
*/
public static boolean areBordersEqual(double border1, double border2) {
return Math.abs(border1 - border2) <= 1;
}
public static void main(String[] args) {
new LayoutExtraGaps();
}
}
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