File	Doc	Category	Size	Date	Package
IconView.java	API Doc	Java SE 5 API	4889	Fri Aug 26 14:58:16 BST 2005	javax.swing.text

IconView

• java.lang.Object
  • javax.swing.text.View

Fields Summary
private Icon	c

Constructors Summary
public IconView(Element elem) Creates a new icon view that represents an element. param elem the element to create a view for super(elem); AttributeSet attr = elem.getAttributes(); c = StyleConstants.getIcon(attr);

Methods Summary
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. param axis may be either View.X_AXIS or View.Y_AXIS return 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. switch (axis) { case View.Y_AXIS: return 1; default: return super.getAlignment(axis); }
public float	getPreferredSpan(int axis) Determines the preferred span for this view along an axis. param axis may be either View.X_AXIS or View.Y_AXIS return 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. exception IllegalArgumentException for an invalid axis switch (axis) { case View.X_AXIS: return c.getIconWidth(); case View.Y_AXIS: return c.getIconHeight(); default: throw new IllegalArgumentException("Invalid axis: " + axis); }
public java.awt.Shape	modelToView(int pos, java.awt.Shape a, javax.swing.text.Position$Bias b) Provides a mapping from the document model coordinate space to the coordinate space of the view mapped to it. param pos the position to convert >= 0 param a the allocated region to render into return the bounding box of the given position exception BadLocationException if the given position does not represent a valid location in the associated document see View#modelToView int p0 = getStartOffset(); int p1 = getEndOffset(); if ((pos >= p0) && (pos <= p1)) { Rectangle r = a.getBounds(); if (pos == p1) { r.x += r.width; } r.width = 0; return r; } throw new BadLocationException(pos + " not in range " + p0 + "," + p1, pos);
public void	paint(java.awt.Graphics g, java.awt.Shape a) Paints the icon. The real paint behavior occurs naturally from the association that the icon has with its parent container (the same container hosting this view), so this simply allows us to position the icon properly relative to the view. Since the coordinate system for the view is simply the parent containers, positioning the child icon is easy. param g the rendering surface to use param a the allocated region to render into see View#paint Rectangle alloc = a.getBounds(); c.paintIcon(getContainer(), g, alloc.x, alloc.y);
public int	viewToModel(float x, float y, java.awt.Shape a, javax.swing.text.Position$Bias[] bias) Provides a mapping from the view coordinate space to the logical coordinate space of the model. param x the X coordinate >= 0 param y the Y coordinate >= 0 param a the allocated region to render into return the location within the model that best represents the given point of view >= 0 see View#viewToModel Rectangle alloc = (Rectangle) a; if (x < alloc.x + (alloc.width / 2)) { bias[0] = Position.Bias.Forward; return getStartOffset(); } bias[0] = Position.Bias.Backward; return getEndOffset();