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<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Thanks to everyone who has tested this. I made
a problem report on Wed 2009-08-26 9:22 AM under the subject line:<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>“[Qgis-user] QGIS API
QgsMapToolEmitPoint Is Not Working Now andQGIS Crashes”<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>When the image clipper plugin stopped working
for me. I tracked the problem down to the point where it was going to grab the
location of mouse clicks on the canvas. Unfortunately I couldn’t figure
out why this was happening because I believed that I was following the right
procedures according to the documentation. I never did get any response to this
query but I didn’t worry about this then because all of my existing installations
were working OK. Now I just tried updating my OSGEO4W installation with the
latest version of QGIS and I am getting this problem on this workstation. So it
seems to be related to something to the way that I am getting the mouse
pointing. And it the problem only appears after I upgrade the installations (or
install a new download) using OSGEO4W.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Hopefully someone who is smarter that I am
about this stuff can spot what is causing the trouble.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Incidentally, I developed this with
version 1.1 of QGIS and tried testing it with 1.0.2 and it didn’t work
there, so I assume that something wasn’t available in the API for version
1.0.2.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'> Bob Bruce<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Here is the report that I made earlier:<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal style='text-autospace:none'><font size=2 face="Courier New"><span
style='font-size:10.0pt;font-family:"Courier New"'>Something strange is
happening, a plugin that was working before has stopped working for me now. I
recently set up a new Windows XP system (which has been fully patched) and then
installed QGIS 1.0, 1.1.0 and<o:p></o:p></span></font></p>
<p class=MsoNormal style='text-autospace:none'><font size=2 face="Courier New"><span
style='font-size:10.0pt;font-family:"Courier New"'>1.2 along with the libraries
using the OSGEO4W installer. It has been two months since I have been using
this plugin but I don't suppose that the API has changed in that time?<o:p></o:p></span></font></p>
<p class=MsoNormal style='text-autospace:none'><font size=2 face="Courier New"><span
style='font-size:10.0pt;font-family:"Courier New"'><o:p> </o:p></span></font></p>
<p class=MsoNormal style='text-autospace:none'><font size=2 face="Courier New"><span
style='font-size:10.0pt;font-family:"Courier New"'>When I run my plugin in QGIS
1.1.0 (Pan) the Python code in the plugin enables the mouse clicks on the
canvas to be captured and when I move the cursor on the mapcanvas I see a
cross-hair cursor but as soon as I click on the canvas a Windows dialog appears
with the message "qgis.exe has encountered a problem and needs to
close" and QGIS crashes. The slot function never seems to be entered
because the QMessageBox at the top of it never appears before the crash. Shown
below is a snippet of my Python code in which I have added some calls to
QMessageBox in the function setUpRubberBanding and these get called but the
message box in setClipWindow never gets called before the crash.<o:p></o:p></span></font></p>
<p class=MsoNormal style='text-autospace:none'><font size=2 face="Courier New"><span
style='font-size:10.0pt;font-family:"Courier New"'><o:p> </o:p></span></font></p>
<p class=MsoNormal style='text-autospace:none'><font size=2 face="Courier New"><span
style='font-size:10.0pt;font-family:"Courier New"'>What would be causing this
QGIS crash?<o:p></o:p></span></font></p>
<p class=MsoNormal style='text-autospace:none'><font size=2 face="Courier New"><span
style='font-size:10.0pt;font-family:"Courier New"'><o:p> </o:p></span></font></p>
<p class=MsoNormal style='text-autospace:none'><font size=2 face="Courier New"><span
style='font-size:10.0pt;font-family:"Courier New"'>thanks,<o:p></o:p></span></font></p>
<p class=MsoNormal style='text-autospace:none'><font size=2 face="Courier New"><span
style='font-size:10.0pt;font-family:"Courier New"'> Bob Bruce<o:p></o:p></span></font></p>
<p class=MsoNormal style='text-autospace:none'><font size=2 face="Courier New"><span
style='font-size:10.0pt;font-family:"Courier New"'><o:p> </o:p></span></font></p>
<p class=MsoNormal style='text-autospace:none'><font size=2 face="Courier New"><span
style='font-size:10.0pt;font-family:"Courier New"'> def
setUpRubberBanding(self):<o:p></o:p></span></font></p>
<p class=MsoNormal style='text-autospace:none'><font size=2 face="Courier New"><span
style='font-size:10.0pt;font-family:"Courier New"'> -<o:p></o:p></span></font></p>
<p class=MsoNormal style='text-autospace:none'><font size=2 face="Courier New"><span
style='font-size:10.0pt;font-family:"Courier New"'> -<o:p></o:p></span></font></p>
<p class=MsoNormal style='text-autospace:none'><font size=2 face="Courier New"><span
style='font-size:10.0pt;font-family:"Courier New"'> (ommitted code)<o:p></o:p></span></font></p>
<p class=MsoNormal style='text-autospace:none'><font size=2 face="Courier New"><span
style='font-size:10.0pt;font-family:"Courier New"'> -<o:p></o:p></span></font></p>
<p class=MsoNormal style='text-autospace:none'><font size=2 face="Courier New"><span
style='font-size:10.0pt;font-family:"Courier New"'> -<o:p></o:p></span></font></p>
<p class=MsoNormal style='text-autospace:none'><font size=2 face="Courier New"><span
style='font-size:10.0pt;font-family:"Courier New"'> self.canvas =
self.iface.mapCanvas()<o:p></o:p></span></font></p>
<p class=MsoNormal style='text-autospace:none'><font size=2 face="Courier New"><span
style='font-size:10.0pt;font-family:"Courier New"'>
QMessageBox.information(self,'ImageClipperDlg - ClipImage','In<o:p></o:p></span></font></p>
<p class=MsoNormal style='text-autospace:none'><font size=2 face="Courier New"><span
style='font-size:10.0pt;font-family:"Courier New"'>Function:
setUpRubberBanding'+\<o:p></o:p></span></font></p>
<p class=MsoNormal style='text-autospace:none'><font size=2 face="Courier New"><span
style='font-size:10.0pt;font-family:"Courier New"'> ' Map Canvas Scale
= "' + str(self.canvas.scale()) + '"')<o:p></o:p></span></font></p>
<p class=MsoNormal style='text-autospace:none'><font size=2 face="Courier New"><span
style='font-size:10.0pt;font-family:"Courier New"'> self.emitPoint =
QgsMapToolEmitPoint(self.canvas)<o:p></o:p></span></font></p>
<p class=MsoNormal style='text-autospace:none'><font size=2 face="Courier New"><span
style='font-size:10.0pt;font-family:"Courier New"'>
self.canvas.setMapTool(self.emitPoint)<o:p></o:p></span></font></p>
<p class=MsoNormal style='text-autospace:none'><font size=2 face="Courier New"><span
style='font-size:10.0pt;font-family:"Courier New"'>
QMessageBox.information(self,'ImageClipperDlg - ClipImage','In<o:p></o:p></span></font></p>
<p class=MsoNormal style='text-autospace:none'><font size=2 face="Courier New"><span
style='font-size:10.0pt;font-family:"Courier New"'>Function:
setUpRubberBanding'+\<o:p></o:p></span></font></p>
<p class=MsoNormal style='text-autospace:none'><font size=2 face="Courier New"><span
style='font-size:10.0pt;font-family:"Courier New"'>
' about to connect signal "canvasClicked"')<o:p></o:p></span></font></p>
<p class=MsoNormal style='text-autospace:none'><font size=2 face="Courier New"><span
style='font-size:10.0pt;font-family:"Courier New"'>
QObject.connect(self.emitPoint, SIGNAL("canvasClicked(QgsPoint &,
Qt::MouseButton)"), self.setClipWindow)<o:p></o:p></span></font></p>
<p class=MsoNormal style='text-autospace:none'><font size=2 face="Courier New"><span
style='font-size:10.0pt;font-family:"Courier New"'>
self.isEmittingPoint = True<o:p></o:p></span></font></p>
<p class=MsoNormal style='text-autospace:none'><font size=2 face="Courier New"><span
style='font-size:10.0pt;font-family:"Courier New"'><o:p> </o:p></span></font></p>
<p class=MsoNormal style='text-autospace:none'><font size=2 face="Courier New"><span
style='font-size:10.0pt;font-family:"Courier New"'> def setClipWindow(self,
point, button):<o:p></o:p></span></font></p>
<p class=MsoNormal style='text-autospace:none'><font size=2 face="Courier New"><span
style='font-size:10.0pt;font-family:"Courier New"'>
QMessageBox.information(self,'ImageClipperDlg - ClipImage','Entered Function:
setClipWindow')<o:p></o:p></span></font></p>
<p class=MsoNormal style='text-autospace:none'><font size=2 face="Courier New"><span
style='font-size:10.0pt;font-family:"Courier New"'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<div>
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face="Times New Roman"><span style='font-size:12.0pt'>
<hr size=2 width="100%" align=center tabindex=-1>
</span></font></div>
<p class=MsoNormal><b><font size=2 face=Tahoma><span style='font-size:10.0pt;
font-family:Tahoma;font-weight:bold'>From:</span></font></b><font size=2
face=Tahoma><span style='font-size:10.0pt;font-family:Tahoma'>
qgis-user-bounces@lists.osgeo.org [mailto:qgis-user-bounces@lists.osgeo.org] <b><span
style='font-weight:bold'>On Behalf Of </span></b>G. Allegri<br>
<b><span style='font-weight:bold'>Sent:</span></b> Tuesday, September 01, 2009
8:18 AM<br>
<b><span style='font-weight:bold'>To:</span></b> Swapnil Chaudhari<br>
<b><span style='font-weight:bold'>Cc:</span></b> qgis-user@lists.osgeo.org<br>
<b><span style='font-weight:bold'>Subject:</span></b> Re: [Qgis-user] QGIS
Image Clipper Plugin Available</span></font><o:p></o:p></p>
</div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
<p class=MsoNormal style='margin-bottom:12.0pt'><font size=3
face="Times New Roman"><span style='font-size:12.0pt'>It crashes my qgis trunk
(1.3.0) from osgeo4w...<br>
I've no time to debug it now, I will try as soon as I find a bit of time<br>
<br>
giovanni<o:p></o:p></span></font></p>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>2009/9/1 Swapnil Chaudhari <<a href="mailto:sslan@rediffmail.com">sslan@rediffmail.com</a>><o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>Hi Bob, <br>
Can you please check its compatibility with QGIS 1.0.2 Kore? It gives me
compatibility problem error. <br>
Thanks <br>
Best, <br>
Swapnil<br>
On Mon, 31 Aug 2009 08:33:35 +0530 wrote<o:p></o:p></span></font></p>
<div>
<p class=MsoNormal style='margin-bottom:12.0pt'><font size=3
face="Times New Roman"><span style='font-size:12.0pt'><br>
>Hi:<br>
I have a plugin available that people may be interested in testing. <br>
This can be used to extract and combine portions of one or more image <br>
layers in QGIS. I have only used this on Windows but hopefully it would <br>
work OK in Linux also. You can get it and some test data by going to the <br>
page: <a
href="http://www.mappinggeek.ca/QGISPythonPlugins/Bobs-QGIS-plugins.xml"
target="_blank">http://www.mappinggeek.ca/QGISPythonPlugins/Bobs-QGIS-plugins.xml</a>
<br>
. We have been using this plugin a lot at my workplace to extract the <br>
useable portions of scanned photography that we have georeferenced using <br>
the GDAL Georeferencer plugin.<br>
<br>
There is also the zoom-to-point plugin that I have tweaked to work <br>
better with zoom levels.<br>
<br>
Bob Bruce<o:p></o:p></span></font></p>
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<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>No virus found in this outgoing message.<br>
Checked by AVG - <a href="http://www.avg.com" target="_blank">www.avg.com</a> <br>
Version: 8.5.409 / Virus Database: 270.13.71/2335 - Release Date: 08/30/09
06:36:00<o:p></o:p></span></font></p>
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