javax.swing.text.html
Class LineView

java.lang.Object
  javax.swing.text.View
      javax.swing.text.CompositeView
          javax.swing.text.BoxView
              javax.swing.text.FlowView
                  javax.swing.text.ParagraphView
                      javax.swing.text.html.ParagraphView
                          javax.swing.text.html.LineView

All Implemented Interfaces:

SwingConstants, TabExpander

class LineView

extends ParagraphView

A view implementation to display an unwrapped preformatted line.

This subclasses ParagraphView, but this really only contains one Row of text.

Author:

Timothy Prinzing

Nested Class Summary

Nested classes inherited from class javax.swing.text.ParagraphView

Nested classes inherited from class javax.swing.text.FlowView

FlowView.FlowStrategy

Field Summary

(package private) int

tabBase Last place painted at.

Fields inherited from class javax.swing.text.html.ParagraphView

Fields inherited from class javax.swing.text.ParagraphView

firstLineIndent

Fields inherited from class javax.swing.text.FlowView

layoutPool, layoutSpan, strategy

Fields inherited from class javax.swing.text.BoxView

Fields inherited from class javax.swing.text.CompositeView

Fields inherited from class javax.swing.text.View

BadBreakWeight, ExcellentBreakWeight, ForcedBreakWeight, GoodBreakWeight, X_AXIS, Y_AXIS

Fields inherited from interface javax.swing.SwingConstants

BOTTOM, CENTER, EAST, HORIZONTAL, LEADING, LEFT, NEXT, NORTH, NORTH_EAST, NORTH_WEST, PREVIOUS, RIGHT, SOUTH, SOUTH_EAST, SOUTH_WEST, TOP, TRAILING, VERTICAL, WEST

Constructor Summary

LineView(Element elem)
Creates a LineView object.

Method Summary

float	getAlignment(int axis) Gets the alignment for an axis.
protected int	getCharactersPerTab()
float	getMinimumSpan(int axis) Determines the minimum span for this view along an axis.
protected float	getPreTab(float x, int tabOffset) Returns the location for the tab.
int	getResizeWeight(int axis) Gets the resize weight for the specified axis.
boolean	isVisible() Preformatted lines are not suppressed if they have only whitespace, so they are always visible.
protected void	layout(int width, int height) Lays out the children.
float	nextTabStop(float x, int tabOffset) Returns the next tab stop position given a reference position.

Methods inherited from class javax.swing.text.html.ParagraphView

calculateMinorAxisRequirements, getAttributes, getMaximumSpan, getPreferredSpan, getStyleSheet, paint, setParent, setPropertiesFromAttributes

Methods inherited from class javax.swing.text.ParagraphView

adjustRow, breakView, changedUpdate, createRow, findOffsetToCharactersInString, flipEastAndWestAtEnds, getBreakWeight, getClosestPositionTo, getFlowSpan, getFlowStart, getLayoutView, getLayoutViewCount, getNextNorthSouthVisualPositionFrom, getPartialSize, getTabBase, getTabSet, setFirstLineIndent, setJustification, setLineSpacing

Methods inherited from class javax.swing.text.FlowView

getFlowAxis, getViewIndexAtPosition, insertUpdate, loadChildren, removeUpdate

Methods inherited from class javax.swing.text.BoxView

baselineLayout, baselineRequirements, calculateMajorAxisRequirements, childAllocation, forwardUpdate, getAxis, getChildAllocation, getHeight, getOffset, getSpan, getViewAtPoint, getWidth, isAfter, isAllocationValid, isBefore, isLayoutValid, layoutChanged, layoutMajorAxis, layoutMinorAxis, modelToView, paintChild, preferenceChanged, replace, setAxis, setSize, viewToModel

Methods inherited from class javax.swing.text.CompositeView

getBottomInset, getInsideAllocation, getLeftInset, getNextEastWestVisualPositionFrom, getNextVisualPositionFrom, getRightInset, getTopInset, getView, getViewAtPosition, getViewCount, getViewIndex, modelToView, setInsets, setParagraphInsets

Methods inherited from class javax.swing.text.View

append, breakView, createFragment, forwardUpdateToView, getBreakWeight, getContainer, getDocument, getElement, getEndOffset, getGraphics, getParent, getStartOffset, getToolTipText, getViewFactory, getViewIndex, insert, modelToView, remove, removeAll, updateChildren, updateLayout, viewToModel

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

tabBase

int tabBase

Last place painted at.

Constructor Detail

LineView

public LineView(Element elem)

Creates a LineView object.

Parameters:

elem - the element to wrap in a view

Method Detail

isVisible

public boolean isVisible()

Preformatted lines are not suppressed if they have only whitespace, so they are always visible.

Overrides:

isVisible in class ParagraphView

Returns:

true if the paragraph should be displayed

getMinimumSpan

public float getMinimumSpan(int axis)

Determines the minimum span for this view along an axis. The preformatted line should refuse to be sized less than the preferred size.

Overrides:

getMinimumSpan in class ParagraphView

Parameters:

axis - may be either View.X_AXIS or View.Y_AXIS

Returns:

the minimum span the view can be rendered into

See Also:

View.getPreferredSpan(int)

getResizeWeight

public int getResizeWeight(int axis)

Gets the resize weight for the specified axis.

Overrides:

getResizeWeight in class BoxView

Parameters:

axis - may be either X_AXIS or Y_AXIS

Returns:

the weight

getAlignment

public float getAlignment(int axis)

Gets the alignment for an axis.

Overrides:

getAlignment in class ParagraphView

Parameters:

axis - may be either X_AXIS or Y_AXIS

Returns:

the alignment

layout

protected void layout(int width,
                      int height)

Lays out the children. If the layout span has changed, the rows are rebuilt. The superclass functionality is called after checking and possibly rebuilding the rows. If the height has changed, the preferenceChanged method is called on the parent since the vertical preference is rigid.

Overrides:

layout in class FlowView

Parameters:

width - the width to lay out against >= 0. This is the width inside of the inset area.

height - the height to lay out against >= 0 (not used by paragraph, but used by the superclass). This is the height inside of the inset area.

nextTabStop

public float nextTabStop(float x,
                         int tabOffset)

Returns the next tab stop position given a reference position. This view implements the tab coordinate system, and calls getTabbedSpan on the logical children in the process of layout to determine the desired span of the children. The logical children can delegate their tab expansion upward to the paragraph which knows how to expand tabs. LabelView is an example of a view that delegates its tab expansion needs upward to the paragraph.

This is implemented to try and locate a TabSet in the paragraph element's attribute set. If one can be found, its settings will be used, otherwise a default expansion will be provided. The base location for for tab expansion is the left inset from the paragraphs most recent allocation (which is what the layout of the children is based upon).

Specified by:

nextTabStop in interface TabExpander

Overrides:

nextTabStop in class ParagraphView

Parameters:

x - the X reference position

tabOffset - the position within the text stream that the tab occurred at >= 0.

Returns:

the trailing end of the tab expansion >= 0

See Also:

TabSet, TabStop, LabelView

getPreTab

protected float getPreTab(float x,
                          int tabOffset)

Returns the location for the tab.

getCharactersPerTab

protected int getCharactersPerTab()

Returns:

number of characters per tab, 8.