Bug report #10980

Can't set new map extent after changed layer visibilty

Added by zicke - about 9 years ago. Updated almost 8 years ago.

Status:Closed
Priority:Severe/Regression
Assignee:-
Category:Python plugins
Affected QGIS version:master Regression?:No
Operating System:Ubuntu Easy fix?:No
Pull Request or Patch supplied:No Resolution:invalid
Crashes QGIS or corrupts data:No Copied to github as #:19323

Description

After adding a layer with python and change its visibility, I cannot change the map extent properly. It seems that the map canvas zooms to full extent (or latest added layer):

  1. add layer
    root = QgsProject.instance().layerTreeRoot()
QgsMapLayerRegistry.instance().addMapLayer(my_layer)
my_layer_node = root.findLayer(my_layer.id())
my_layer_node.setVisible(Qt.Checked)
  2. set map extent
    rect = another_layer.extent()
rect.scale(5)
self.iface.mapCanvas().setExtent(rect)        
self.iface.mapCanvas().refresh()

    Map extent is wrong and is set to the extent of the newly added layer. Without my_layer_node.setVisible(Qt.Checked) it works. The same happens when you add a layer explicit:
  1. add layer
    QgsMapLayerRegistry.instance().addMapLayer(my_layer, False)
my_layer_node = root.addLayer(my_layer)
  2. set map extent
    rect = another_layer.extent()
rect.scale(5)
self.iface.mapCanvas().setExtent(rect)        
self.iface.mapCanvas().refresh()

    -> Wrong map extent (since the layer is visible by default).

History

#1 Updated by Paolo Cavallini about 9 years ago

  • Subject changed from Can't set new map pextent after changed layer visibilty to Can't set new map extent after changed layer visibilty

#2 Updated by Giovanni Manghi about 9 years ago

  • Status changed from Open to Feedback

what qgis version? was this issue true also on other (older) qgis releases?

#3 Updated by zicke - about 9 years ago

Giovanni Manghi wrote:

what qgis version? was this issue true also on other (older) qgis releases?

Master. (see also affected version combobox).

No, It worked on some 2.1 master so I guess it was introduced with the legend refactoring.

#4 Updated by Giovanni Manghi about 9 years ago

  • Priority changed from Normal to Severe/Regression

#5 Updated by Giovanni Manghi almost 9 years ago

  • Status changed from Feedback to Open

#6 Updated by Martin Dobias almost 9 years ago

Could you provide more details regarding how you run these snippets? Setting of canvas extents works for me when used from python console.

Is the other layer "another_layer" also used in the layer tree? In case the "my_layer" layer is the first one to be added to the layer tree, the auto-setup will take effect (deferred) and it will set extent + CRS automatically. Maybe that's why it gives you the impression that the extent is wrong?

#7 Updated by Jürgen Fischer almost 9 years ago

  • Status changed from Open to Feedback

#8 Updated by Jürgen Fischer over 8 years ago

  • Status changed from Feedback to Closed
  • Resolution set to not reproducable

closing for the lack of feedback

#9 Updated by zicke - over 8 years ago

  • Status changed from Closed to Reopened

Sorry for not giving some feedback. I used to get some email updates for my tickets but not this time. But I still have some troubles with that one. There is not need for a second layer to reproduce it. Am adding some vector layer within a python plugin:

root = QgsProject.instance().layerTreeRoot()
QgsMapLayerRegistry.instance().addMapLayer(my_layer, False)
my_layer_node = root.addLayer(my_layer)

rect = my_layer.extent()
rect.scale(5)
self.iface.mapCanvas().setExtent(rect)        
self.iface.mapCanvas().refresh()

Setting extent works.

root = QgsProject.instance().layerTreeRoot()
QgsMapLayerRegistry.instance().addMapLayer(my_layer)
my_layer_node = root.findLayer(my_layer.id())
my_layer_node.setVisible(Qt.Checked)

rect = my_layer.extent()
rect.scale(5)
self.iface.mapCanvas().setExtent(rect)        
self.iface.mapCanvas().refresh()

Setting extent does not work when using .setVisible() method.

#10 Updated by Giovanni Manghi over 8 years ago

  • Resolution deleted (not reproducable)

#11 Updated by Nathan Woodrow over 8 years ago

I can't see anything wrong here. It sets the extent for me.

#12 Updated by Giovanni Manghi over 8 years ago

  • Status changed from Reopened to Feedback

#13 Updated by Anita Graser almost 8 years ago

Cannot reproduce on OSGeo4W nightly. Setting extent works just fine.

#14 Updated by Nyall Dawson almost 8 years ago

  • Resolution set to invalid
  • Status changed from Feedback to Closed

Closed due to lack of feedback

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