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  1. JDK
  2. JDK-8243457

Result of getBestCursorSize depends on which screen is the Windows primary one

    Details

    • Subcomponent:
    • CPU:
      x86_64
    • OS:
      windows_10

      Description

      ADDITIONAL SYSTEM INFORMATION :
      josm-found

      A DESCRIPTION OF THE PROBLEM :
      Assume a Windows system with two screens.
      Screen 1 has set a scaling of 100%, screen 2 has set a scaling of 200%.
      If screen 1 is set as the primary screen (in the Windows display settings), getBestCursorSize() returns
      java.awt.Dimension[width=64,height=64]

      If screen 2 is set as the secondary screen, getBestCursorSize() returns 32x32.
      java.awt.Dimension[width=32,height=32]

      As no screen resolution has changed, it is surprising that the result of getBestCursorSize changes.

      This problem is closely related to JDK-8240568. If the primary screen has the greater scaling, the cursor is normal/double sized if the primary screen has the greater scaling, and is half/normal sized if the primary screen has the lesser scaling).


      STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
      Set the respective Windows settings and run the submitted test program.

      EXPECTED VERSUS ACTUAL BEHAVIOR :
      EXPECTED -
      java.awt.Dimension[width=64,height=64] in both cases, to support the greatest scaling value well.
      ACTUAL -
      java.awt.Dimension[width=32,height=32] in the case where the low-scaled screen is set as the primary one, java.awt.Dimension[width=64,height=64] otherwise.

      ---------- BEGIN SOURCE ----------
      import java.awt.Dimension;
      import java.awt.Toolkit;

      public class BestCursorSize {
          public static void main(String[] args)
          {
              Dimension bestCursorSize = Toolkit.getDefaultToolkit().getBestCursorSize(32, 32);
              System.out.println("" + bestCursorSize);
          }
      }

      ---------- END SOURCE ----------

      FREQUENCY : always


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              • Assignee:
                serb Sergey Bylokhov
                Reporter:
                webbuggrp Webbug Group
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                Dates

                • Created:
                  Updated: