Package com.mxgraph.canvas

Class mxBasicCanvas

java.lang.Object
com.mxgraph.canvas.mxBasicCanvas
All Implemented Interfaces:
mxICanvas
Direct Known Subclasses:
mxGraphics2DCanvas, mxHtmlCanvas, mxSvgCanvas, mxVmlCanvas
public abstract class mxBasicCanvas extends Object implements mxICanvas

  • Field Details

    • PRESERVE_IMAGE_ASPECT

      public static boolean PRESERVE_IMAGE_ASPECT
      Specifies if image aspect should be preserved in drawImage. Default is true.

    • DEFAULT_IMAGEBASEPATH

      public static String DEFAULT_IMAGEBASEPATH
      Defines the default value for the imageBasePath in all GDI canvases. Default is an empty string.

    • imageBasePath

      protected String imageBasePath
      Defines the base path for images with relative paths. Trailing slash is required. Default value is DEFAULT_IMAGEBASEPATH.

    • translate

      protected mxPoint translate
      Specifies the current translation. Default is (0,0).

    • scale

      protected double scale
      Specifies the current scale. Default is 1.

    • drawLabels

      protected boolean drawLabels
      Specifies whether labels should be painted. Default is true.

    • imageCache

      protected Hashtable<String,BufferedImage> imageCache
      Cache for images.

  • Constructor Details

    • mxBasicCanvas

      public mxBasicCanvas()

  • Method Details

    • setTranslate

      public void setTranslate(double dx, double dy)
      Sets the current translate.
      Specified by:
      setTranslate in interface mxICanvas

    • getTranslate

      public mxPoint getTranslate()
      Returns the current translate.
      Specified by:
      getTranslate in interface mxICanvas
      Returns:
      Returns the current translation.

    • setScale

      public void setScale(double scale)
      Description copied from interface: mxICanvas
      Sets the scale for the following drawing requests.
      Specified by:
      setScale in interface mxICanvas

    • getScale

      public double getScale()
      Description copied from interface: mxICanvas
      Returns the scale.
      Specified by:
      getScale in interface mxICanvas

    • setDrawLabels

      public void setDrawLabels(boolean drawLabels)

    • getImageBasePath

      public String getImageBasePath()

    • setImageBasePath

      public void setImageBasePath(String imageBasePath)

    • isDrawLabels

      public boolean isDrawLabels()

    • loadImage

      public BufferedImage loadImage(String image)
      Returns an image instance for the given URL. If the URL has been loaded before than an instance of the same instance is returned as in the previous call.

    • flushImageCache

      public void flushImageCache()

    • getImageForStyle

      public String getImageForStyle(Map<String,Object> style)
      Gets the image path from the given style. If the path is relative (does not start with a slash) then it is appended to the imageBasePath.