Questions tagged [pyqt]

PyQt provides bindings for Qt 2 and Qt 3.

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PythonQT QGIS print-command

for debugging purposes I would like to print the content of some variables in my PYGT-function, like: print(myGeometrylength) .... The variable has some content but nothing is printed? I just get it ...
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0answers
17 views

QGIS map tile not printing some given extent in one time why?

I made a plugin in QGIS using pyqgis and qt designer to plot OSM tile in which I have one button which connects me to function in which I wrote a program to plot raster layer using param and I am ...
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12 views

Rendering Polygon from geom data onto pyqt widget

I am developing a program that will show the polygon of a selected location. My geometry data is in a spatial PostgreSQL database and I want to use the geom column. I have searched the internet for a ...
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0answers
22 views

How to get display of individual polygons from vector shapefile?

I am creating a shapefile with adding 20 polgons to it. poly = ogr.Geometry(ogr.wkbPolygon) for p in range(20):#20 should be replaced by pix_no ridx = rind1[p] ...
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1answer
33 views

Listing active radio buttons within tab widget or layout?

I have a plugin widget with some tabs, and within the tabs a layout of radio buttons as shown below: I would like to capture the list of active radio buttons within each tab like so: Is there an ...
1
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1answer
15 views

Pulling images into QTWidget (plugin dialog box) from web server? [closed]

I'm trying to show images in a dialogue box (built using QT Creator and interacted with through my plugin). I have the images as a list of URLs, but can't figure out how to get them to display in the ...
1
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2answers
33 views

Developing “Action” that shows changed value of form-field using PyQGIS?

for a vector-layer I would like to produce an action, that shows the changed value in a formular. E.G. I am editing a vector-point-layer, click on a point, the fomular is opening. I change a value (...
2
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1answer
47 views

How do I call the objects created with QtDesigner (or QtCreator) in my code in python? Where is this information in python? PyQt4 please

Where can I find a good documentation on how to refer (to call) to the Dialog created with QtDesigner? For example, a buttomBox (or any other) just created. I’m trying to make a plugin, but the ...
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0answers
15 views

Referencing image using GCP-file?

I'm trying to automate the actual geo-referencing in PyQgis/PyQt5. I went manually over the built-in GDAL Georeferencer in QGIS and saved a GCP-file. Also, the actual commands used for the conversion ...
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33 views

Automating GDAL Georeferencer

I'm using the GUI of the GDAL Georeferencer in qGIS for referencing a lot of images. For a single image it is fine to open qGIS, open the referencer and changing the settings and GCPs manually. ...
3
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0answers
153 views

Canceling task currently running in background using PyQGis?

I am trying to close QgsProject on loading layer (if password and username from QgSProject - datasource are incorrect) before QgsCredentialDialog is shown. on signal : QgsProject.instance()....
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0answers
63 views

QGIS Python plugin crashes when using processing algorithms and QThread

I'm developing a QGIS plugin which calls several processing algorithms. I call them in a pipeline where the input layer of each algo is the output of the previous one. The pipeline is called on each ...
2
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0answers
28 views

Toolbar button with drop down menu

I want to create my own Toolbar with a Toolbar button which has a drop down menu: The following code works fine in the QGIS console: from qgis.core import Qgis from PyQt5.QtWidgets import QToolBar,...
2
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1answer
49 views

How to add DockWidget above the Layer panel using PyQGIS

I'm trying to dock an attribute table on the left hand side of my window, above the Layers panel. By enabling "Open new attribute tables as docked windows" (under Settings Options > Data Sources ...
1
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0answers
38 views

How to run PyQT code inside python console(editor) in QGIS? [closed]

I have built a simple PyQt application(inserting list item in QListWidget) which runs outside the QGIS environment.I want to integrate that inside the QGIS so that all the map layers will be inside ...
0
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0answers
17 views

PYQT - how to regenerate QGridLayout with photos from user selected folder

I'm trying to regenerate a layout in PYQT to display image thumbnails after the user has chosen a photo folder but I've I have only been able to hardcode a folder when building the QGridLayouts to the ...
2
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1answer
58 views

QGIS plugin: set the position of the featureForm

Im developing QGIS plugin (Python3) to open the featureForm (depending on some of my conditions (matching geometries,...))I use this code: layer = self.iface.activeLayer() ...
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0answers
97 views

Can't load Python in QGIS

I am following a tutorial developing a Python plugin in QGIS. After completing the script for the plugin I got the following message the next time I started QGIS. Warning I am a complete novice with ...
1
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1answer
57 views

QgsMapToolEmitPoint.canvasReleaseEvent not firing with SHIFT modifier

I've created a plugin that implements a Map Tool. It captures mouse click events, which works fine. Now I want to capture Shift+Mouseclick. This doesn't work at all, while Alt+Mouseclick and Ctrl+...
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0answers
24 views

QgsVectorLayerCache causes QGIS to crash when called within def run(self)

This is in reference to the similar question regarding QgsVectorLayerCache . The original code is taken from here I'm trying to implement this method within the def run(self) method. def run(self):...
6
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1answer
2k views

How to fix 'Could not find the Qt platform plugin “Windows” in “”' when implementing qgis in custom Python3 application?

I am implementing qgis 3.4.3 in a custom application, but when I instantiate the QgsApplication() class, I receive the error "Could not find the Qt platform plugin "Windows" in "". I've attempted ...
2
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2answers
158 views

Using PYQT drawing function in QGIS?

I work on a wood fire simulator project in university that uses QGIS. I have to draw various symbols on the map. As I'm not able to design it with qgis functions so I made it with in a stand alone ...
1
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1answer
209 views

Adding x,y labels in QGraphicsview using pyqt4? [closed]

Here is my sample program. When I need to draw a line for x axis and y label for y axis .so can any one help me how to add a line and labels to scene.i tried different ways but i didn't get the proper ...
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0answers
22 views

Find diagram for understanding pyqgis

In orther to undestand the api of pyqgis, i'd like to konw where can i find a diagram of pyqgis api ?
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0answers
33 views

QGIS (maptool) Plugin Crashes on some computers

I developed a custom Plugin which inherits from QGIS MapTool.The plugin has user interfaces and can add features to the map based on a GUI. The Plugin works Fine on some computer(when they installed ...
3
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1answer
137 views

Get xy coordinates of QgsMapCanvas in PyQGIS 3?

I am trying to get the QgsMapCanvas coordinates when they change using PyQt5 and PyQGIS 3. What I have used for that: self.canvas.scaleChanged.connect(lambda: self.showScale(self.canvas.scale())) ...
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0answers
42 views

Locking QGIS and parent forms [closed]

I am trying to make a plugin for QGIS. This plugin has lots of forms and based on the condition the form calls a child Form. The following is an example I am using PyQt for creating forms. I want the ...
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0answers
94 views

QGIS Python Plugin - Prevent Dialog From Closing Immediately after OK Clicked

I've generated a QGIS plugin using the QGIS Plugin Builder v3.0.3. One issue I am encountering with it is - as soon as I click the "OK" button (that invokes the run method) - the dialog closes. Is ...
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0answers
23 views

Qdialog control events not working for own ui design

Created new postgis line layer and after capturing single feature need to show my own form design i.e. Qdialog,instead of default qdialog. used this coding for showing my own ui dsign. QgsVectorLayer....
0
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1answer
208 views

Toggle Editing Add Feature

i have loaded the layers in qgis from database. so after picking "toggle editing" plugin,the other corresponding plugin are in disabled state only,they are not enabled.how to set "add feature" plugin ...
1
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0answers
28 views

Using graphical modeler script via command line

I have made a script through the graphical modeler and I exported it. This is the code that it exported: [Python code] https://imgur.com/a/ivgWXUh How do I run this code outside of QGIS? Which ...
2
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1answer
739 views

Adding a Tiles/wms? (openStreetMap) layer with python in QGIS

In my QGIS python plugin I want to add a background map (if the user haven't added one), hence I think I missing something in the url for the Tiles/wms service.. (the function returns invalid layer) ...
1
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0answers
70 views

Simple user input in QGIS with pyqt plugin

SplitPolygon plugin allows the user to enter an angle by which the polygon(s) will be split. I would like to modify the plugin and take that value from graphical user input (say, parallel with one ...
3
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2answers
123 views

Stopping execution of plugin or deactivating running plugin using plugin name without closing QGIS in pyqgis?

How do I stop the execution of plugin or deactivate the running plugin using plugin name without closing QGIS in pyqgis? lstofplugins=qgis.utils.active_plugins for k in range(len(lstofplugins)-2): ...
1
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0answers
58 views

Lock the nativity of the QGIS using PyQGIS [closed]

How to lock the nativity of the QGIS using PyQGIS icon = QtGui.QIcon(folPath + '\Dsmsoft.png') pixmap = icon.pixmap(302, 302, QtGui.QIcon.Normal, QtGui.QIcon.On) icon = QtGui.QIcon() ...
3
votes
1answer
1k views

Work around for “Couldn’t load PyQt” error with QGIS 3.0.3 on Ubuntu 18.04?

I am working with a fresh install of Ubuntu 18.04 and installed QGIS using https://qgis.org/debian. I get the following error when I launch QGIS: Couldn't load PyQt. Python support will be disabled. ...
1
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1answer
2k views

AttributeError: 'NoneType' object has no attribute 'pushButton'

I am using pyqt5 working in Qgis to create a simple plugin, i started by creating a pushButton wit QtCreator and create an event using this code : from PyQt5.QtCore import QSettings, QTranslator, ...
0
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2answers
87 views

Intercepting QGIS panels closings?

I would like to be able to intercept QGIS panels (QDockWidgets) closings. I read the API online help but i don't clearly understand it.Is there any usable close signal linked with dockWidgets? In ...
1
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1answer
422 views

How to use QT QGis custom widget in a plugin?

I am writing a new plugin for QGIS 2.18. I can't find what are the libraries to import in my main code to access widgets such as QgsSpinBox or QgsFileWidget.
0
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1answer
323 views

How to get the click coordinates for the use in a custom form

I'm having a Spatialite layer to store photo locations from objects (stored in another Spatialite layer) taken in the field. Therefor I'm using a custom photo form like explained here. Since now I ...
0
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1answer
2k views

Running Python produces 'No module named 'PyQt4' in Qgis on Mac High Sierra

I was following the instructions in this guide: Create a Polygon Shapefile from Point data and fairly sure I substituted field variables to match my data. However, when I run the script on my Mac (...
1
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0answers
578 views

QPixmap: Must construct a QApplication before a QPaintDevice

I am creating a PyQT and QGIS application and im trying to add a combobox to the UI. I have defined the layout of my UI in a separate module to the main module. I know it is an issue with the combobox ...
0
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1answer
198 views

auto complete input widgets

I am building a plugin in python for Qgis. I want the users to be able to start typing a text and that auto compellation to pop up based on values in a certain field I will define. Is this possible ...
2
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2answers
619 views

Usage of QgsTask and QgsTaskManager

I'm trying to test the new QgsTask and QgsTaskManager, I found some examples in the PullRequest in github. I modified it slightly and added a print(i) in the code bellow: from qgis.core import ...
1
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1answer
115 views

Getting response right in QGIS plugin?

I am trying to get my plugin working and have some issues with the count of currently selected layers. As am listening to legendInterface().currentLayerChanged(), triggering a function that is ...
2
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2answers
1k views

qgis2web cannot find QtWebKit

I have QGIS 2.18.16, in Arch Linux; I wanted to use the qgis2web plugin and I realized it is not working anymore (it used to work last time I used it a few months back) I get the following error ...
1
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1answer
239 views

Different performance of counting features in ogr.Layer returned from ExecuteSQL

I am working on a PyQt5 desktop application GDBee which allows executing SQL queries against Esri file geodatabases using GDAL. My development environment is Windows 10 64bit, Python 3.5, and Python ...
1
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0answers
158 views

Controlling messages that are pushed to QgsMessageBar() [duplicate]

I've got a QGIS processing script which displays progress in the message bar, using the code in the PyQGIS cookbook. It displays properly at the beginning of processing, but my code calls some other ...
1
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1answer
214 views

pyqgis correct activate signal for combo box list

I am a pyqgis user and I am trying to create a QGIS plugin where that plugin have two tabs widgets and two combo box where first combo box have a list from layers and second combo box have list of ...
1
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1answer
126 views

PyQGIS plugin doesn't work layer list combo box

I want to create a simple QGIS plugin with a simple combo box with list from my layers in _ _init_ _ : legendInterface = self.iface.legendInterface() listLayerName = [i.name() for i in ...