PyQGIS Developer Cookbook

• 1. Introduction
  • 1.1. Scripting in the Python Console
  • 1.2. Python Plugins
  • 1.3. Running Python code when QGIS starts
  • 1.4. Python Applications
  • 1.5. Technical notes on PyQt and SIP
• 2. Loading Projects
  • 2.1. Resolving bad paths
• 3. Loading Layers
  • 3.1. Vector Layers
  • 3.2. Raster Layers
  • 3.3. QgsProject instance
• 4. Accessing the Table Of Contents (TOC)
  • 4.1. The QgsProject class
  • 4.2. QgsLayerTreeGroup class
• 5. Using Raster Layers
  • 5.1. Layer Details
  • 5.2. Renderer
  • 5.3. Query Values
• 6. Using Vector Layers
  • 6.1. Retrieving information about attributes
  • 6.2. Iterating over Vector Layer
  • 6.3. Selecting features
  • 6.4. Modifying Vector Layers
  • 6.5. Using Spatial Index
  • 6.6. The QgsVectorLayerUtils class
  • 6.7. Creating Vector Layers
  • 6.8. Appearance (Symbology) of Vector Layers
  • 6.9. Further Topics
• 7. Geometry Handling
  • 7.1. Geometry Construction
  • 7.2. Access to Geometry
  • 7.3. Geometry Predicates and Operations
• 8. Projections Support
  • 8.1. Coordinate reference systems
  • 8.2. CRS Transformation
• 9. Using the Map Canvas
  • 9.1. Embedding Map Canvas
  • 9.2. Rubber Bands and Vertex Markers
  • 9.3. Using Map Tools with Canvas
  • 9.4. Writing Custom Map Tools
  • 9.5. Writing Custom Map Canvas Items
• 10. Map Rendering and Printing
  • 10.1. Simple Rendering
  • 10.2. Rendering layers with different CRS
  • 10.3. Output using print layout
• 11. Expressions, Filtering and Calculating Values
  • 11.1. Parsing Expressions
  • 11.2. Evaluating Expressions
  • 11.3. Handling expression errors
• 12. Reading And Storing Settings
• 13. Communicating with the user
  • 13.1. Showing messages. The QgsMessageBar class
  • 13.2. Showing progress
  • 13.3. Logging
• 14. Authentication infrastructure
  • 14.1. Introduction
  • 14.2. Glossary
  • 14.3. QgsAuthManager the entry point
  • 14.4. Adapt plugins to use Authentication infrastructure
  • 14.5. Authentication GUIs
• 15. Tasks - doing heavy work in the background
  • 15.1. Introduction
  • 15.2. Examples
• 16. Developing Python Plugins
  • 16.1. Structuring Python Plugins
  • 16.2. Code Snippets
  • 16.3. Using Plugin Layers
  • 16.4. IDE settings for writing and debugging plugins
  • 16.5. Releasing your plugin
• 17. Writing a Processing plugin
  • 17.1. Creating from scratch
  • 17.2. Updating a plugin
• 18. Network analysis library
  • 18.1. General information
  • 18.2. Building a graph
  • 18.3. Graph analysis
• 19. QGIS Server and Python
  • 19.1. Introduction
  • 19.2. Server API basics
  • 19.3. Standalone or embedding
  • 19.4. Server plugins
• 20. Cheat sheet for PyQGIS
  • 20.1. User Interface
  • 20.2. Settings
  • 20.3. Toolbars
  • 20.4. Menus
  • 20.5. Canvas
  • 20.6. Layers
  • 20.7. Table of contents
  • 20.8. Advanced TOC
  • 20.9. Processing algorithms
  • 20.10. Decorators
  • 20.11. Composer
  • 20.12. Sources