Bug report #1311

Zoom to a single point causes the program to freeze

Added by zachariahyoder - about 14 years ago. Updated over 13 years ago.

Assignee:Marco Hugentobler
Affected QGIS version: Regression?:No
Operating System:Windows Easy fix?:No
Pull Request or Patch supplied: Resolution:fixed
Crashes QGIS or corrupts data: Copied to github as #:11371


Rather than simply doing nothing, when I select a single point and choose "zoom to selection" the CPU goes to 100% and the program freezes.

Logically the user shouldn't want to zoom to a single point (except when he*'s found the point using the database Table find feature)

Related to #80 (and also #651 and #154).

  • "he" used in the old gender neutral sense

ExampleZoomError.zip (4.57 KB) zachariahyoder -, 2008-11-10 08:19 AM

Associated revisions

Revision 9eec5dd8
Added by Jürgen Fischer over 13 years ago

fix #1311

git-svn-id: http://svn.osgeo.org/qgis/trunk/[email protected] c8812cc2-4d05-0410-92ff-de0c093fc19c

Revision 40650bbb
Added by Jürgen Fischer over 13 years ago

fix #1311

git-svn-id: http://svn.osgeo.org/qgis/[email protected] c8812cc2-4d05-0410-92ff-de0c093fc19c


#1 Updated by Marco Hugentobler about 14 years ago

What is the version you are using? It seems to me that this problem is fixed in current svn trunk (tested on Linux, but seems to be very unlikely that this is platform specific).

#2 Updated by zachariahyoder - about 14 years ago

I am testing on version 0.11.0 (and also 0.10.0).

I agree that it seems like a bug like this would affect all platforms, but I'm afraid at the moment I can only report what I am experiencing.

It is difficult for me to download large (70+MB) files where I work, but let me know if you want me to try with any other version.

#3 Updated by Magnus Homann almost 14 years ago

  • Status changed from Open to In Progress

Do you have rasters loaded in your canvas when you do this selection. For me, that makes the computer freeze for a while. This is due to the fact that zooming ratsers can be really slow sometimes.

If in fact you do not have any rasters loaded, we're back to square #3905.

#4 Updated by zachariahyoder - almost 14 years ago

No, I don't have any rasters loaded. However, I do have a shape with a dash-dot outline style surrounding the point.

In the attached file the problem DOES NOT occur:
a) If you zoom to "Point A" which is not within a polygon
b) If you zoom to "Point D" while the outline style for the ExamplePolygon is solid line

However, if
a) you select "Point D"
AND b) you choose "zoom to selection"
WHILE c) the outline style for ExamplePolygon is "dash dot line"

The CPU goes to 100% and (for me) never comes back out again, and I have to force the program to close. (But maybe my computer isn't fast enough or I'm not patient enough)

I suspect #1344 may be related to this.

Note: ExamplePolygon refers to an attached file, not the reference it wants to automatically link to.

#5 Updated by Paolo Cavallini over 13 years ago

Is this still valid? I have tested it rather extensively, and it never occurred to me: can we colse it down?

#6 Updated by Paolo Cavallini over 13 years ago

  • Status changed from In Progress to Closed
  • Resolution set to fixed

In the absence of further confirmation, I'm closing it down. Please reopen it if appropriate.

#7 Updated by Giovanni Manghi over 13 years ago

  • Status changed from Closed to Feedback
  • Resolution deleted (fixed)

Unfortunately I have to re-open this ticket, as I confirm this behaviour under Windows. I tested qgis Qgis 1.2 (rev. 10972M) installed from OSGeo4W under windows XP Professional.

I tested with the provided vectors and also with others made on purpose.

Pick a polygon and a point layer with a one or more points overlapping the polygon. Change the symbology of the outline of the polygon to something different from "solid line". Select a point that overlaps the polygon and then "zoom to selection".

Result is: QGIS freezes.

This don't happens (at least) with QGIS > 1.1 under Ubuntu 9.04

#8 Updated by Giovanni Manghi over 13 years ago

  • Status changed from Feedback to Open

#9 Updated by Jürgen Fischer over 13 years ago

  • Resolution set to fixed
  • Status changed from Open to Closed

fixed in 40650bbb (SVN r10995)

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