Java(TM) 2 Platform, Standard Edition, v1.2.2 API Specification: Class PasswordView - JDK 5 Documentation v1.2.2, Java 2 SDK 英文文档

Overview

Package

Class

Use

Tree

Deprecated

Index

Help

Java^TM 2 Platform
Standard Edition

PREV CLASS NEXT CLASS

FRAMES NO FRAMES

SUMMARY: INNER | FIELD | CONSTR | METHOD

DETAIL: FIELD | CONSTR | METHOD

javax.swing.text
Class PasswordView

java.lang.Object
  |
  +--javax.swing.text.View
        |
        +--javax.swing.text.PlainView
              |
              +--javax.swing.text.FieldView
                    |
                    +--javax.swing.text.PasswordView

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

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, preferenceChanged

Methods inherited from class javax.swing.text.View

breakView, createFragment, getAlignment, getAttributes, getBreakWeight, getChildAllocation, getContainer, getDocument, getElement, getEndOffset, getMaximumSpan, getMinimumSpan, getNextVisualPositionFrom, getParent, getStartOffset, getView, getViewCount, getViewFactory, isVisible, modelToView, modelToView, setParent, setSize, 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[])