All Packages  Class Hierarchy  This Package  Previous  Next  Index

Class com.sun.java.swing.text.WrappedPlainView

java.lang.Object
   |
   +----com.sun.java.swing.text.View
           |
           +----com.sun.java.swing.text.CompositeView
                   |
                   +----com.sun.java.swing.text.BoxView
                           |
                           +----com.sun.java.swing.text.WrappedPlainView

public class WrappedPlainView
extends BoxView
implements TabExpander
View of plain text (text with only one font and color) that does line-wrapping. This view expects that it's associated element has child elements that represent the lines it should be wrapping. It is implemented as a vertical box that contains logical line views. The logical line views are nested classes that render the logical line as multiple physical line if the logical line is too wide to fit within the allocation. The line views draw upon the outer class for it's state to reduce their memory requirements.

The line views do all of their rendering through the drawLine method which in turn does all of it's rendering through the drawSelectedText and drawUnselectedText methods. This enables subclasses to easily specialize the rendering without concern for the layout aspects.

See Also:
View

Constructor Index

 o WrappedPlainView(Element)

Method Index

 o changedUpdate(DocumentEvent, Shape, ViewFactory)
Gives notification from the document that attributes were changed in a location that this view is responsible for.
 o drawLine(int, int, Graphics, int, int)
Renders a line of text, suppressing whitespace at the end and exanding any tabs.
 o drawSelectedText(Graphics, int, int, int, int)
Renders the given range in the model as selected text.
 o drawUnselectedText(Graphics, int, int, int, int)
Renders the given range in the model as normal unselected text.
 o getLineBuffer()
Gives access to a buffer that can be used to fetch text from the associated document.
 o getPreferredSpan(int)
Determines the preferred span for this view along an axis.
 o getTabSize()
Returns the tab size set for the document, defaulting to 8.
 o insertUpdate(DocumentEvent, Shape, ViewFactory)
Gives notification that something was inserted into the document in a location that this view is responsible for.
 o loadChildren(ViewFactory)
Loads all of the children to initialize the view.
 o nextTabStop(float, int)
Returns the next tab stop position after a given reference position.
 o paint(Graphics, Shape)
Renders using the given rendering surface and area on that surface.
 o removeUpdate(DocumentEvent, Shape, ViewFactory)
Gives notification that something was removed from the document in a location that this view is responsible for.
 o setSize(float, float)
Sets the size of the view.

Constructors

 o WrappedPlainView
 public WrappedPlainView(Element elem)

Methods

 o getTabSize
 protected int getTabSize()
Returns the tab size set for the document, defaulting to 8.

Returns:
the tab size
 o drawLine
 protected void drawLine(int p0,
                         int p1,
                         Graphics g,
                         int x,
                         int y)
Renders a line of text, suppressing whitespace at the end and exanding any tabs. This is implemented to make calls to the methods drawUnselectedText and drawSelectedText so that the way selected and unselected text are rendered can be customized.

Parameters:
p0 - the starting document location to use
p1 - the ending document location to use
g - the graphics context
x - the starting X position
y - the starting Y position
See Also:
drawUnselectedText, drawSelectedText
 o drawUnselectedText
 protected int drawUnselectedText(Graphics g,
                                  int x,
                                  int y,
                                  int p0,
                                  int p1) throws BadLocationException
Renders the given range in the model as normal unselected text.

Parameters:
g - the graphics context
x - the starting X coordinate
y - the starting Y coordinate
p0 - the beginning position in the model
p1 - the ending position in the model
Returns:
s the location of the end of the range
Throws: BadLocationException
if the range is invalid
 o drawSelectedText
 protected int drawSelectedText(Graphics g,
                                int x,
                                int y,
                                int p0,
                                int p1) throws BadLocationException
Renders the given range in the model as selected text. This is implemented to render the text in the color specified in the hosting component. It assumes the highlighter will render the selected background.

Parameters:
g - the graphics context
x - the starting X coordinate
y - the starting Y coordinate
p0 - the beginning position in the model
p1 - the ending position in the model
Returns:
s the location of the end of the range.
Throws: BadLocationException
if the range is invalid
 o getLineBuffer
 protected final Segment getLineBuffer()
Gives access to a buffer that can be used to fetch text from the associated document.

Returns:
s the buffer
 o loadChildren
 protected void loadChildren(ViewFactory f)
Loads all of the children to initialize the view. This is called by the setParent method. Subclasses can reimplement this to initialize their child views in a different manner. The default implementation creates a child view for each child element.

Parameters:
f - the view factory
Overrides:
loadChildren in class CompositeView
 o nextTabStop
 public float nextTabStop(float x,
                          int tabOffset)
Returns the next tab stop position after a given reference position. This implementation does not support things like centering so it ignores the tabOffset argument.

Parameters:
x - the current position
tabOffset - the position within the text stream that the tab occurred at.
Returns:
the tab stop, measured in points
 o paint
 public void paint(Graphics g,
                   Shape a)
Renders using the given rendering surface and area on that surface. This is implemented to stash the selection positions, selection colors, and font metrics for the nested lines to use.

Parameters:
g - the rendering surface to use
a - the allocated region to render into
Overrides:
paint in class BoxView
See Also:
paint
 o setSize
 public void setSize(float width,
                     float height)
Sets the size of the view. If the size has changed, layout is redone. The size is the full size of the view including the inset areas.

Parameters:
width - the width
height - the height
Overrides:
setSize in class BoxView
 o getPreferredSpan
 public float getPreferredSpan(int axis)
Determines the preferred span for this view along an axis. This is implemented to provide the superclass behavior after first making sure that the current font metrics are cached (for the nested lines which use the metrics to determine the height of the potentially wrapped lines).

Parameters:
axis - may be either X_AXIS or Y_AXIS
Returns:
s 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.
Overrides:
getPreferredSpan in class BoxView
See Also:
getPreferredSpan
 o insertUpdate
 public void insertUpdate(DocumentEvent e,
                          Shape a,
                          ViewFactory f)
Gives notification that something was inserted into the document in a location that this view is responsible for. This is implemented to simply update the children.

Parameters:
e - the change information from the associated document
a - the current allocation of the view
f - the factory to use to rebuild if the view has children
Overrides:
insertUpdate in class BoxView
See Also:
insertUpdate
 o removeUpdate
 public void removeUpdate(DocumentEvent e,
                          Shape a,
                          ViewFactory f)
Gives notification that something was removed from the document in a location that this view is responsible for. This is implemented to simply update the children.

Parameters:
e - the change information from the associated document
a - the current allocation of the view
f - the factory to use to rebuild if the view has children
Overrides:
removeUpdate in class BoxView
See Also:
removeUpdate
 o changedUpdate
 public void changedUpdate(DocumentEvent e,
                           Shape a,
                           ViewFactory f)
Gives notification from the document that attributes were changed in a location that this view is responsible for.

Parameters:
e - the change information from the associated document
a - the current allocation of the view
f - the factory to use to rebuild if the view has children
Overrides:
changedUpdate in class BoxView
See Also:
changedUpdate

All Packages  Class Hierarchy  This Package  Previous  Next  Index