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2014-07-24
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| 02:31 | • Closed ticket [45bc2252]: Display artifacts when scrolling a Text widget on OS X plus 7 other changes artifact: ade7dc9c user: kevin_walzer | |
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2014-07-15
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| 17:08 | • Add attachment scroll_patch to ticket [45bc2252] artifact: 4a017add user: anonymous | |
| 17:02 | • Add attachment scroll_patch to ticket [45bc2252] artifact: 25d1ac16 user: anonymous | |
| 17:00 | • Add attachment ScrollArtifact.png to ticket [45bc2252] artifact: a7746e45 user: anonymous | |
| 16:59 | • New ticket [45bc2252] Display artifacts when scrolling a Text widget on OS X. artifact: fefcd078 user: anonymous | |
| Ticket UUID: | 45bc2252066b706bfea8553c34b13a92ca3bbb3d | |||
| Title: | Display artifacts when scrolling a Text widget on OS X | |||
| Type: | Bug | Version: | 8.5 | |
| Submitter: | anonymous | Created on: | 2014-07-15 16:59:13 | |
| Subsystem: | 18. [text] | Assigned To: | kevin_walzer | |
| Priority: | 5 Medium | Severity: | Important | |
| Status: | Closed | Last Modified: | 2014-07-24 02:31:37 | |
| Resolution: | Accepted | Closed By: | kevin_walzer | |
| Closed on: | 2014-07-24 02:31:37 | |||
| Description: |
On OS X, when scrolling a Text widget with embedded images, each image will leave a "vapor trail" comprised of many copies of the image, sometimes overlapping. I will upload a screen shot showing the artifacts, and a patch which appears to fix the problem. The basic issue seems to be that when an image is displayed on an NSView, it is also created as a subview. This causes the Appkit to repeatedly display the subview image in its original position, while earlier copies of the image are scrolled into different locations and remain in the display. The patch adds a damage region for each embedded image and also forces redisplay of each image after the scroll. It is hard to verify from the terse Apple documentation that this is the correct procedure but, empirically, it works. | |||
| User Comments: |
kevin_walzer added on 2014-07-24 02:31:37:
I see the issue and also see that the patch fixes the issue. Thank you. | |||
