1 /*
   2  * Copyright (c) 2020, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  */
  23 
  24 import java.awt.Dialog;
  25 import java.awt.Dimension;
  26 import java.awt.Frame;
  27 import java.awt.Window;
  28 import java.util.List;
  29 import java.util.concurrent.TimeUnit;
  30 
  31 import jdk.test.lib.Platform;
  32 import jdk.test.lib.process.OutputAnalyzer;
  33 import jdk.test.lib.process.ProcessTools;
  34 
  35 /**
  36  * @test
  37  * @bug 8221823
  38  * @key headful
  39  * @summary Verifies TOP level component's minimumSize using different DPI
  40  * @library /test/lib
  41  * @run main/othervm -Dsun.java2d.uiScale=1 MinimumSizeDPIVariation
  42  */
  43 public final class MinimumSizeDPIVariation {
  44 
  45     public static void main(String[] args) throws Exception {
  46         if (args.length == 0) {
  47             Dimension minimumSize = test(new Frame());
  48             checkAllDPI("frame", minimumSize.width, minimumSize.height);
  49             minimumSize = test(new Window(null));
  50             checkAllDPI("window", minimumSize.width, minimumSize.height);
  51             minimumSize = test(new Dialog((Frame) null));
  52             checkAllDPI("dialog", minimumSize.width, minimumSize.height);
  53         } else {
  54             String comp = args[0];
  55             int w = Integer.parseInt(args[1]);
  56             int h = Integer.parseInt(args[2]);
  57             double scale = Double.parseDouble(args[3]);
  58 
  59             System.err.println("comp = " + comp);
  60             System.err.println("scale = " + scale);
  61 
  62             Dimension minimumSize = switch (comp) {
  63                 case "frame" -> test(new Frame());
  64                 case "window" -> test(new Window(null));
  65                 case "dialog" -> test(new Dialog((Frame) null));
  66                 default -> throw new java.lang.IllegalStateException(
  67                         "Unexpected value: " + comp);
  68             };
  69             check(minimumSize.width, Math.max(w / scale, 1));
  70             check(minimumSize.height, Math.max(h / scale, 1));
  71         }
  72     }
  73 
  74     private static Dimension test(Window window) {
  75         try {
  76             window.setLayout(null); // trigger use the minimum size of the peer
  77             window.setSize(new Dimension(1, 1));
  78             window.pack();
  79             Dimension minimumSize = window.getMinimumSize();
  80             Dimension size = window.getSize();
  81             if (!minimumSize.equals(size)) {
  82                 System.err.println(window);
  83                 System.err.println("Expected: " + minimumSize);
  84                 System.err.println("Actual: " + size);
  85                 throw new RuntimeException("Wrong size");
  86             }
  87             return minimumSize;
  88         } finally {
  89             window.dispose();
  90         }
  91     }
  92 
  93     private static void check(int actual, double expected) {
  94         double i = 100 * (actual - expected) / expected;
  95         if (Math.abs(i) > 10) { // no more than 10% variation
  96             System.err.println("Expected: " + expected);
  97             System.err.println("Actual: " + actual);
  98             throw new RuntimeException("Difference is too big: " + i);
  99         }
 100     }
 101 
 102     private static void checkAllDPI(String comp, int w, int h)
 103             throws Exception {
 104         if (!Platform.isOSX()) {
 105             for (String dpi : List.of("1.5", "1.75", "2", "2.5")) {
 106                 runPocess(dpi, comp, w, h);
 107             }
 108         }
 109     }
 110 
 111     private static void runPocess(String dpi, String comp, int w, int h)
 112             throws Exception {
 113         ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(
 114                 "-Dsun.java2d.uiScale=" + dpi,
 115                 MinimumSizeDPIVariation.class.getSimpleName(), comp,
 116                 String.valueOf(w), String.valueOf(h), dpi);
 117         Process worker = ProcessTools.startProcess("Worker", pb, null, 20,
 118                 TimeUnit.SECONDS);
 119         new OutputAnalyzer(worker).shouldHaveExitValue(0);
 120     }
 121 }