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In QGIS, many operations should only be applied to a subset of the data: a specific set of features selected by the user. In this article, we will learn how a QGIS plugin can detect, validate,…
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Modifying data in a QGIS layer is often the moment when beginner plugin developers start feeling nervous: What if I break something? That concern is completely understandable—and actually a good sign. The good news is that…
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Collecting user input is an important milestone in QGIS plugin development. However, a useful plugin does more than simply read values entered in a dialog box. It validates data, applies rules, and makes decisions based on…
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When you first start developing QGIS plugins, it is easy to assume that a button should automatically “do something” when it is clicked. In reality, a button does nothing at all—until you tell it what to…
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Reading the code of a QGIS plugin can quickly become stressful when you are new to Python. Multiple files, classes, unfamiliar methods… everything can seem complex at first glance. And yet, you don’t need to understand…
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Adding a button to the QGIS interface is often the first concrete step when developing a plugin. It is what turns a simple Python script into a tool that can actually be used by end users.…
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