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  1. JDK
  2. JDK-4343270

Toolkit.createCustomCursor() hangs the VM under Win NT

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    Details

    • Type: Bug
    • Status: Resolved
    • Priority: P4
    • Resolution: Fixed
    • Affects Version/s: 1.4.0
    • Fix Version/s: 1.4.1
    • Component/s: docs
    • Subcomponent:
    • Resolved In Build:
      hopper
    • CPU:
      x86
    • OS:
      windows_nt

      Description



      Name: dsR10051 Date: 06/05/2000



      The method java.awt.Toolkit.createCustomCursor(Image cursor, Point hotSpot, String name)
      hangs the VM under Windows NT if cursor is multi-frame image.

      Here is a minimized test:

      import java.io.*;
      import java.awt.*;
      import java.awt.image.*;

      public class TestToolkit {
              public static void main(String[] args) {
                  try {
                      Toolkit tk = Toolkit.getDefaultToolkit();
                      String file = "file:///" + args[0] + "/31kb.gif";
                      System.out.println("File: " + file);
                      Image im = tk.getImage(new java.net.URL(file));
                      Canvas c = new Canvas();
                      if(!tk.prepareImage(im, -1, -1, c)) {
                              while((tk.checkImage(im, -1, -1,c) &
                                      (ImageObserver.FRAMEBITS |
                                      ImageObserver.ALLBITS)) == 0) {
                                  Thread.yield();
                              }
                      }
                      System.out.println(tk.checkImage(im, -1, -1,c));
                      Point p = new Point(0,0);
                      System.out.println("Custom cursor creating");
                      Cursor cur = tk.createCustomCursor(im, p, "Test");
                      System.out.println("Custom cursor is successfully created");

                      
                      System.exit(0);
                  } catch (Exception e) {
                      e.printStackTrace();
                  }
              }
      }

      Multi-frame image "31kb.gif" is attached.

      --- Output ---
      F:\NightlyNT\BIN\Tests>f:\NightlyNT\java\jdk1.3\win32\bin\java -version
      java version "1.3.0"
      Java(TM) 2 Runtime Environment, Standard Edition (build 1.3.0-C)
      Java HotSpot(TM) Client VM (build 1.3.0-C, mixed mode)

      F:\NightlyNT\BIN\Tests>f:\NightlyNT\java\jdk1.3\win32\bin\java -classpath . TestToolkit f:/NightlyNT/BIN/Tests
      File: file:///f:/NightlyNT/BIN/Tests/31kb.gif
      23
      Custom cursor creating
      ^C

      ======================================================================

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            Assignee:
            sharonz Sharon Zakhour (Inactive)
            Reporter:
            sdasunw Sda Sda (Inactive)
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