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What should my plugin look like in QGIS 3?
QGIS Python plugins need a few mandatory modules and methods so they work smoothly with QGIS. Consider the name of your plugin ‘MyPlugin’, whose boiler plate code was generated with Plugin Builder 3. The minimum tree for a functioning output of Plugin Builder 3 would look like: icon.png: the default icon for the plugin.
How to identify features in the QGIS toolbar?
To identify features, use View ‣ Identify features or press Ctrl + Shift + I, or click on the Identify features icon in the toolbar. If you click on several features, the Identify results dialog will list information about all the selected features. The first item is the number of the layer in the list of results, followed by the layer name.
Can a grass tool be run from QGIS?
GRASS modules can be run from QGIS GRASS Tools if QGIS was started from a GRASS shell or if a GRASS mapset was opened from QGIS. The modules work with GRASS data only. It is easy to modify the menu and add new modules because both the menu and the modules are defined in XML configuration files.
How to enable a back buffer in QGIS?
Open the QGIS options dialog using Settings ‣ Options, go to the Rendering tab and select or deselect the following checkboxes: Enable back buffer. This provides better graphics performance at the cost of losing the possibility to cancel rendering and incrementally draw features.
How to reload a QGIS plugin in Python?
Back in the main QGIS window, reload the plugin by going to Plugins ‣ Plugin Reloader ‣ Reload plugin: SaveAttributes. Alternatively, you can just press F5. To test this new functionality, we must load some layers in QGIS.
How to create point features with exact coordinates in QGIS 3?
In QGIS 3, the NumericalDigitize tool no longer seems to be available but here is a further solution. As of QGIS 3 you can simply copy and past WKT directly into the canvas. This works for single or multiple features all in one go eg: This is less fiddly for multiple features than the Advanced Digitize Plugin.
How to populate combo box with layers loaded in QGIS?
Let’s add some logic to the plugin that will populate the combo box with the layers loaded in QGIS. Go to the plugin directory and load the file save_attributes.py in a text editor. Scroll down and find the run (self) method. This method will be called when you click the toolbar button or select the plugin menu item.