![]() ![]() Its _init_() method expects to be passed a reference to a QgsMapCanvas. Nearest_feature_tool.py defines a new NearestFeatureMapTool class (line 28) which inherits (is based on) QgsMapTool, the QGIS Map Tool class. Those links will open in a dedicated browser tab. ![]() Note that many of the code segments (highlighted in gray) below link to relevant parts of the API docs.Copy nearest_feature_map_tool.py into the NearestFeature folder and open it in an editor.It can be found in nearest_feature_map_tool.py in the Additional Files folder. We’re going to adapt it to instead activate a Map Tool.Ī basic Map Tool is included within the zip file mentioned above. When activated, our plugin currently shows a simple dialog (functionality provided by the Plugin Builder plugin. Open the Plugin Manager: Plugins > Manage and Install PluginsĪ new action should now be visible in the plugins toolbar which opens the following dialog:.Let’s now load and run this simple base plugin in QGIS. This base plugin can be found in the zip file mentioned above under code/01_Empty Plugin/NearestFeatureĬode/01_Empty Plugin contains a batch file install.bat that can be used to copy the plugin into your QGIS plugins folder, making it available to QGIS. The QGIS Plugin Builder plugin was used to create a base plugin which we’ll modify to fit our requirements. Download and extract this code and data.Our Select Nearest Feature Map Tool will allow the user to select the feature nearest a mouse click on the canvas. We will create a new Select Nearest Feature Map Tool which will sit in the plugins toolbar. ![]() A Map Tool is a tool which performs an action when used with the map canvas. The Identify Features and Pan Map tools are both examples of QGIS Map Tools. ![]() We will develop a plugin that implements a new QGIS Map Tool. The Goalīefore we get started let’s look at where we’re going. Knowledge of Python is recommended but not required. In this tutorial you will develop your first QGIS plugin - a Map Tool for selecting the closest feature within multiple loaded vector layers. It was written to support a workshop we ran for the Scottish QGIS user group here in the UK and aims to be a simple step-by-step guide. This blog post is a QGIS plugin tutorial for beginners. ![]()
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