JavaTM 2 Platform
Std. Ed. v1.3.1

javax.swing.text
Class PasswordView

java.lang.Object
  |
  +--javax.swing.text.View
        |
        +--javax.swing.text.PlainView
              |
              +--javax.swing.text.FieldView
                    |
                    +--javax.swing.text.PasswordView
All Implemented Interfaces:
SwingConstants, TabExpander

public class PasswordView
extends FieldView

Implements a View suitable for use in JPasswordField UI implementations. This is basically a field ui that renders its contents as the echo character specified in the associated component (if it can narrow the component to a JPasswordField).

See Also:
View

Fields inherited from class javax.swing.text.PlainView
metrics
 
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, NORTH, NORTH_EAST, NORTH_WEST, RIGHT, SOUTH, SOUTH_EAST, SOUTH_WEST, TOP, TRAILING, VERTICAL, WEST
 
Constructor Summary
PasswordView(Element elem)
          Constructs a new view wrapped on an element.
 
Method Summary
protected  int drawEchoCharacter(Graphics g, int x, int y, char c)
          Renders the echo character, or whatever graphic should be used to display the password characters.
protected  int drawSelectedText(Graphics g, int x, int y, int p0, int p1)
          Renders the given range in the model as selected text.
protected  int drawUnselectedText(Graphics g, int x, int y, int p0, int p1)
          Renders the given range in the model as normal unselected text.
 Shape modelToView(int pos, Shape a, Position.Bias b)
          Provides a mapping from the document model coordinate space to the coordinate space of the view mapped to it.
 int viewToModel(float fx, float fy, Shape a, Position.Bias[] bias)
          Provides a mapping from the view coordinate space to the logical coordinate space of the model.
 
Methods inherited from class javax.swing.text.FieldView
adjustAllocation, getFontMetrics, getPreferredSpan, getResizeWeight, insertUpdate, paint, removeUpdate
 
Methods inherited from class javax.swing.text.PlainView
changedUpdate, drawLine, getLineBuffer, getTabSize, nextTabStop
 
Methods inherited from class javax.swing.text.View
append, breakView, createFragment, forwardUpdate, forwardUpdateToView, getAlignment, getAttributes, getBreakWeight, getChildAllocation, getContainer, getDocument, getElement, getEndOffset, getGraphics, getMaximumSpan, getMinimumSpan, getNextVisualPositionFrom, getParent, getStartOffset, getView, getViewCount, getViewFactory, getViewIndex, insert, isVisible, modelToView, modelToView, preferenceChanged, remove, removeAll, replace, setParent, setSize, updateChildren, updateLayout, viewToModel
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Constructor Detail

PasswordView

public PasswordView(Element elem)
Constructs a new view wrapped on an element.
Parameters:
elem - the element
Method Detail

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. This sets the foreground color and echos the characters using the value returned by getEchoChar().
Overrides:
drawUnselectedText in class PlainView
Parameters:
g - the graphics context
x - the starting X coordinate >= 0
y - the starting Y coordinate >= 0
p0 - the starting offset in the model >= 0
p1 - the ending offset in the model >= p0
Throws:
BadLocationException - if p0 or p1 are out of range

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. Uses the result of getEchoChar() to display the characters.
Overrides:
drawSelectedText in class PlainView
Parameters:
g - the graphics context
x - the starting X coordinate >= 0
y - the starting Y coordinate >= 0
p0 - the starting offset in the model >= 0
p1 - the ending offset in the model >= p0
Throws:
BadLocationException - if p0 or p1 are out of range

drawEchoCharacter

protected int drawEchoCharacter(Graphics g,
                                int x,
                                int y,
                                char c)
Renders the echo character, or whatever graphic should be used to display the password characters. The color in the Graphics object is set to the appropriate foreground color for selected or unselected text.
Parameters:
g - the graphics context
x - the starting X coordinate >= 0
y - the starting Y coordinate >= 0
c - the echo character
Returns:
the updated X position >= 0

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.
Overrides:
modelToView in class FieldView
Parameters:
pos - the position to convert >= 0
a - the allocated region to render into
Returns:
the bounding box of the given position
Throws:
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)

viewToModel

public int viewToModel(float fx,
                       float fy,
                       Shape a,
                       Position.Bias[] bias)
Provides a mapping from the view coordinate space to the logical coordinate space of the model.
Overrides:
viewToModel in class FieldView
Parameters:
fx - the X coordinate >= 0.0f
fy - the Y coordinate >= 0.0f
a - the allocated region to render into
Returns:
the location within the model that best represents the given point in the view
See Also:
View.viewToModel(float, float, java.awt.Shape, javax.swing.text.Position.Bias[])

JavaTM 2 Platform
Std. Ed. v1.3.1

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