JDK-8163124 : On HiDPI display text width can have floating point value so there should be a way to set the caret to floating point position: add floating point API support to javax.swing.text.Caret
  • Type: Bug
  • Component: client-libs
  • Sub-Component: javax.swing
  • Affected Version: 9
  • Priority: P3
  • Status: Closed
  • Resolution: Cannot Reproduce
  • Submitted: 2016-08-03
  • Updated: 2017-10-31
  • Resolved: 2017-10-31
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JDK 10
10Resolved
Related Reports
Relates :  
JDK-8156217 - Selected text is shifted on HiDPI display
Relates :  
JDK-8163175 - PlainView.modelToView() method should return Rectangle2D
Description
The following methods in javax.swing.text.Caret interface use integer coordinates:
void setMagicCaretPosition(Point p)
Point getMagicCaretPosition()

On HiDPI display text width can have floating point value so there should be a way to set the caret to floating point position.
Comments
Testing with already introduced testcase javax/swing/text/Caret/8163124/CaretFloatingPointAPITest.java I could not reproduce any caret position problem in jdk10 with uiScale > 1
31-10-2017
Targeted to 10 as an issue introduced in 8u or 9
17-02-2017
Approved by component triage team to defer
02-12-2016
SQE: JDK 9: OK to defer
02-12-2016
Deffer request: The rounding of the floating point caret position for the moving to new line can cause problems in only under special conditions like a font size is very small and the UI scale is very large (like font is Dialog plain with size 2 and UI scale is 32) For more details see: http://mail.openjdk.java.net/pipermail/swing-dev/2016-September/006706.html
01-12-2016
the remaining work to be done: The fix is on the review: http://mail.openjdk.java.net/pipermail/swing-dev/2016-August/006450.html the risk level: low justification: the new API allows to properly draw a Swing caret on HiDPI displays. best estimate of the date by which the feature will be complete: 30 of August. But it really depends on the review.
06-09-2016
This is a tweak (potential bug), but not an enhancement.
06-09-2016
The proposed fix: http://cr.openjdk.java.net/~alexsch/8163124/webrev.00/ The review thread: http://mail.openjdk.java.net/pipermail/swing-dev/2016-August/006450.html
04-08-2016
The following public methods will be added: javax.swing.text.Caret.getMagicCaretPosition2D() javax.swing.text.Caret.setMagicCaretPosition2D(Point2D p) javax.swing.text.JTextComponent.modelToView2D(int pos) javax.swing.text.JTextComponent.viewToModel2D(Point2D pt) javax.swing.text.ParagraphView.getClosestPositionTo(int pos, Position.Bias b, Shape a, int direction, Position.Bias[], int rowIndex, float x)
04-08-2016