java.lang.Object
- javax.swing.text.View
- - javax.swing.text.PlainView
  - - javax.swing.text.FieldView

All Implemented Interfaces:

SwingConstants, TabExpander

Direct Known Subclasses:

PasswordView
```
public class FieldView
extends PlainView
```
Extends the multi-line plain text view to be suitable for a single-line editor view. If the view is allocated extra space, the field must adjust for it. If the hosting component is a JTextField, this view will manage the ranges of the associated BoundedRangeModel and will adjust the horizontal allocation to match the current visibility settings of the JTextField.

See Also:
View

Field Summary
- 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, NEXT, NORTH, NORTH_EAST, NORTH_WEST, PREVIOUS, RIGHT, SOUTH, SOUTH_EAST, SOUTH_WEST, TOP, TRAILING, VERTICAL, WEST

Constructor Summary

Constructors
Constructor and Description

FieldView(Element elem)
Constructs a new FieldView wrapped on an element.

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Method Summary

Methods
Modifier and Type	Method and Description
`protected Shape`	`adjustAllocation(Shape a)` Adjusts the allocation given to the view to be a suitable allocation for a text field.
`protected FontMetrics`	`getFontMetrics()` Fetches the font metrics associated with the component hosting this view.
`float`	`getPreferredSpan(int axis)` Determines the preferred span for this view along an axis.
`int`	`getResizeWeight(int axis)` Determines the resizability of the view along the given axis.
`void`	`insertUpdate(DocumentEvent changes, Shape a, ViewFactory f)` Gives notification that something was inserted into the document in a location that this view is responsible for.
`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.
`void`	`paint(Graphics g, Shape a)` Renders using the given rendering surface and area on that surface.
`void`	`removeUpdate(DocumentEvent changes, Shape a, ViewFactory f)` Gives notification that something was removed from the document in a location that this view is responsible for.
`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.

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Methods inherited from class javax.swing.text.PlainView
changedUpdate, damageLineRange, drawLine, drawSelectedText, drawUnselectedText, getLineBuffer, getTabSize, lineToRect, nextTabStop, setSize, updateDamage, updateMetrics

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

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - FieldView
```
public FieldView(Element elem)
```
    Constructs a new FieldView wrapped on an element.
    
    Parameters:
    elem - the element
- Method Detail
  - getFontMetrics
```
protected FontMetrics getFontMetrics()
```
    Fetches the font metrics associated with the component hosting this view.
    
    Returns:
    the metrics
  - adjustAllocation
```
protected Shape adjustAllocation(Shape a)
```
    Adjusts the allocation given to the view to be a suitable allocation for a text field. If the view has been allocated more than the preferred span vertically, the allocation is changed to be centered vertically. Horizontally the view is adjusted according to the horizontal alignment property set on the associated JTextField (if that is the type of the hosting component).
    
    Parameters:
    a - the allocation given to the view, which may need to be adjusted.
    
    Returns:
    the allocation that the superclass should use.
  - paint
```
public void paint(Graphics g,
         Shape a)
```
    Renders using the given rendering surface and area on that surface. The view may need to do layout and create child views to enable itself to render into the given allocation.
    
    Overrides:
    
    paint in class PlainView
    
    Parameters:
    g - the rendering surface to use
    a - the allocated region to render into
    See Also:
    View.paint(java.awt.Graphics, java.awt.Shape)
  - getPreferredSpan
```
public float getPreferredSpan(int axis)
```
    Determines the preferred span for this view along an axis.
    
    Overrides:
    
    getPreferredSpan in class PlainView
    
    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)
  - getResizeWeight
```
public int getResizeWeight(int axis)
```
    Determines the resizability of the view along the given axis. A value of 0 or less is not resizable.
    
    Overrides:
    
    getResizeWeight in class View
    
    Parameters:
    axis - View.X_AXIS or View.Y_AXIS
    
    Returns:
    the weight -> 1 for View.X_AXIS, else 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 PlainView
    
    Parameters:
    pos - the position to convert >= 0
    a - the allocated region to render into
    b - 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
    Position.Bias.Backward
    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 PlainView
    
    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[])
  - insertUpdate
```
public void insertUpdate(DocumentEvent changes,
                Shape a,
                ViewFactory f)
```
    Gives notification that something was inserted into the document in a location that this view is responsible for.
    
    Overrides:
    
    insertUpdate in class PlainView
    
    Parameters:
    changes - 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
    See Also:
    View.insertUpdate(javax.swing.event.DocumentEvent, java.awt.Shape, javax.swing.text.ViewFactory)
  - removeUpdate
```
public void removeUpdate(DocumentEvent changes,
                Shape a,
                ViewFactory f)
```
    Gives notification that something was removed from the document in a location that this view is responsible for.
    
    Overrides:
    
    removeUpdate in class PlainView
    
    Parameters:
    changes - 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
    See Also:
    View.removeUpdate(javax.swing.event.DocumentEvent, java.awt.Shape, javax.swing.text.ViewFactory)

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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/fieldview.html

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Referenzen

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Inhaltsverzeichnis Haut

Class FieldView

Field Summary

Fields inherited from class javax.swing.text.PlainView

Fields inherited from class javax.swing.text.View

Fields inherited from interface javax.swing.SwingConstants

Constructor Summary

Method Summary

Methods inherited from class javax.swing.text.PlainView

Methods inherited from class javax.swing.text.View

Methods inherited from class java.lang.Object

Constructor Detail

FieldView

Method Detail

getFontMetrics

adjustAllocation

paint

getPreferredSpan

getResizeWeight

modelToView

viewToModel

insertUpdate

removeUpdate

Referenzen