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How to set layer visibility in QGIS 3?
For QGIS 3, you have to use: QgsProject.instance ().layerTreeRoot ().findLayer (layer_id).setItemVisibilityChecked (False) Reading the documentation, findLayer accepts both the layer itself or the layer ID as a string. After this the map Canvas will redraw and you can see the changes.
Is there a complete pythonic QGIS API reference?
There is a complete QGIS API reference that documents the classes from the QGIS libraries. Pythonic QGIS API is nearly identical to the API in C++. A good resource when dealing with plugins is to download some plugins from plugin repository and examine their code.
Where to find pyhon bindings in QGIS install?
Relevant pyhon bindings are included in the QGIS install on Windows. But to use them from the plugin folder, we need to indicate the path to the QGIS install. Create a Windows Batch file (.bat extension) with the following content and save it on your computer as compile.bat. We will later copy this file to the plugin folder.
Where do I find the plugin folder in QGIS?
In QGIS, locate your current profile folder by going to Settings ‣ User Profiles ‣ Open Active Profile Folder. In the profile folder, copy the plugin folder to python ‣ plugins subfolder.
How to make a layer visible in Python?
I’m new at Python but for a school project, I have to write a small program, which, if it gets activated, makes an “invisible” layer visible. Seriously, I do not know, where to start. I tried it with that code:
How to see changes in a layer in findlayer?
Reading the documentation, findLayer accepts both the layer itself or the layer ID as a string. After this the map Canvas will redraw and you can see the changes. Normally you should see changes when you zoom in and out to force a refresh of the mapCanvas manually.
How to switch on and off icon groups in QGIS?
The Toolbars‣ menu provides the possibility to switch on and off icon groups in the QGIS toolbar (see figure_panels_toolbars ). In QGIS, you can use an overview panel that provides a full extent view of layers added to it.
Where do I find the overview panel in QGIS?
In QGIS, you can use an overview panel that provides a full extent view of layers added to it. It can be selected under the menu Settings ‣ Panels or View ‣ Panels. Within the view is a rectangle showing the current map extent. This allows you to quickly determine which area of the map you are currently viewing.