Module java.desktop

Class IconView

  • All Implemented Interfaces:

    public class IconView
    extends View
    Icon decorator that implements the view interface. The entire element is used to represent the icon. This acts as a gateway from the display-only View implementations to interactive lightweight icons (that is, it allows icons to be embedded into the View hierarchy. The parent of the icon is the container that is handed out by the associated view factory.
    • Constructor Detail

      • IconView

        public IconView​(Element elem)
        Creates a new icon view that represents an element.
        elem - the element to create a view for
    • Method Detail

      • paint

        public void paint​(Graphics g,
                          Shape a)
        Paints the icon. The real paint behavior occurs naturally from the association that the icon has with its parent container (the same container hosting this view), so this simply allows us to position the icon properly relative to the view. Since the coordinate system for the view is simply the parent containers, positioning the child icon is easy.
        Specified by:
        paint in class View
        g - the rendering surface to use
        a - the allocated region to render into
        See Also:
        View.paint(java.awt.Graphics, java.awt.Shape)
      • getPreferredSpan

        public float getPreferredSpan​(int axis)
        Determines the preferred span for this view along an axis.
        Specified by:
        getPreferredSpan in class View
        axis - may be either View.X_AXIS or View.Y_AXIS
        the span the view would like to be rendered into Typically the view is told to render into the span that is returned, although there is no guarantee. The parent may choose to resize or break the view.
        IllegalArgumentException - for an invalid axis
        See Also:
      • getAlignment

        public float getAlignment​(int axis)
        Determines the desired alignment for this view along an axis. This is implemented to give the alignment to the bottom of the icon along the y axis, and the default along the x axis.
        getAlignment in class View
        axis - may be either View.X_AXIS or View.Y_AXIS
        the desired alignment >= 0.0f && <= 1.0f. This should be a value between 0.0 and 1.0 where 0 indicates alignment at the origin and 1.0 indicates alignment to the full span away from the origin. An alignment of 0.5 would be the center of the view.
      • modelToView

        public Shape modelToView​(int pos,
                                 Shape a,
                                 Position.Bias b)
                          throws BadLocationException
        Provides a mapping from the document model coordinate space to the coordinate space of the view mapped to it.
        Specified by:
        modelToView in class View
        pos - the position to convert >= 0
        a - the allocated region to render into
        b - the bias toward the previous character or the next character represented by the offset, in case the position is a boundary of two views; b will have one of these values:
        • Position.Bias.Forward
        • Position.Bias.Backward
        the bounding box of the given position
        BadLocationException - if the given position does not represent a valid location in the associated document
        See Also:
        View.modelToView(int, java.awt.Shape, javax.swing.text.Position.Bias)