# Uses of Class
org.apache.sis.portrayal.Observable

Packages that use Observable
Package
Description
org.apache.sis.gui.coverage
Widgets showing `GridCoverage` images or sample values.
org.apache.sis.gui.map
Widgets for showing a map in a JavaFX application.
org.apache.sis.portrayal
Symbology and map representations, together with a rendering engine for display.

- ## Uses of Observable in org.apache.sis.gui.coverage

  Subclasses of Observable in org.apache.sis.gui.coverage
  Modifier and Type
  Class
  Description
  `class`
  `CoverageCanvas`
  A canvas for `RenderedImage` provided by a `GridCoverage` or a `GridCoverageResource`.

- ## Uses of Observable in org.apache.sis.gui.map

  Subclasses of Observable in org.apache.sis.gui.map
  Modifier and Type
  Class
  Description
  `class`
  `MapCanvas`
  A canvas for maps to be rendered on screen in a JavaFX application.
  `class`
  `MapCanvasAWT`
  A canvas for maps to be rendered using Java2D from Abstract Window Toolkit.

- ## Uses of Observable in org.apache.sis.portrayal

  Subclasses of Observable in org.apache.sis.portrayal
  Modifier and Type
  Class
  Description
  `class`
  `Canvas`
  Common abstraction for implementations that manage the display and user manipulation of spatial graphic elements.
  `class`
  `PlanarCanvas`
  A canvas for two-dimensional display device using a Cartesian coordinate system.