- java.lang.Object
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- javax.swing.text.View
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- javax.swing.text.PlainView
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- javax.swing.text.FieldView
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- javax.swing.text.PasswordView
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- 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
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Field Summary
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Fields inherited from class javax.swing.text.PlainView
metrics
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Fields inherited from class javax.swing.text.View
BadBreakWeight, ExcellentBreakWeight, ForcedBreakWeight, GoodBreakWeight, X_AXIS, Y_AXIS
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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
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Constructor Summary
Constructors Constructor and Description PasswordView(Element elem)
Constructs a new view wrapped on an element.
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Method Summary
Methods Modifier and Type Method and Description 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.float
getPreferredSpan(int axis)
Determines the preferred span for this view along an axis.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, getResizeWeight, insertUpdate, paint, removeUpdate
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Methods inherited from class javax.swing.text.PlainView
changedUpdate, damageLineRange, drawLine, getLineBuffer, getTabSize, lineToRect, nextTabStop, setSize, updateDamage, updateMetrics
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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, getToolTipText, getView, getViewCount, getViewFactory, getViewIndex, getViewIndex, insert, isVisible, modelToView, modelToView, preferenceChanged, remove, removeAll, replace, setParent, updateChildren, updateLayout, viewToModel
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Constructor Detail
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PasswordView
public PasswordView(Element elem)
Constructs a new view wrapped on an element.- Parameters:
elem
- the element
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Method Detail
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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 classPlainView
- Parameters:
g
- the graphics contextx
- the starting X coordinate >= 0y
- the starting Y coordinate >= 0p0
- the starting offset in the model >= 0p1
- the ending offset in the model >= p0- Returns:
- the X location of the end of the range >= 0
- Throws:
BadLocationException
- if p0 or p1 are out of range
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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 classPlainView
- Parameters:
g
- the graphics contextx
- the starting X coordinate >= 0y
- the starting Y coordinate >= 0p0
- the starting offset in the model >= 0p1
- the ending offset in the model >= p0- Returns:
- the X location of the end of the range >= 0
- Throws:
BadLocationException
- if p0 or p1 are out of range
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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 contextx
- the starting X coordinate >= 0y
- the starting Y coordinate >= 0c
- the echo character- Returns:
- the updated X position >= 0
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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 classFieldView
- Parameters:
pos
- the position to convert >= 0a
- the allocated region to render intob
- the bias toward the previous character or the next character represented by the offset, in case the position is a boundary of two views;b
will have one of these values:-
Position.Bias.Forward
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Position.Bias.Backward
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- 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)
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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 classFieldView
- Parameters:
fx
- the X coordinate >= 0.0ffy
- the Y coordinate >= 0.0fa
- 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[])
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getPreferredSpan
public float getPreferredSpan(int axis)
Determines the preferred span for this view along an axis.- Overrides:
getPreferredSpan
in classFieldView
- Parameters:
axis
- may be either View.X_AXIS or View.Y_AXIS- Returns:
- the span the view would like to be rendered into >= 0. 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.
- See Also:
View.getPreferredSpan(int)
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Vielen Dank im Voraus.
Dokument erstellt 11/06/2005, zuletzt geändert 04/03/2020
Quelle des gedruckten Dokuments:https://www.gaudry.be/de/java-api-rf-javax/swing/text/PasswordView.html
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