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/OpenJDK 21

Class ParagraphView

java.lang.Object
javax.swing.text.View
javax.swing.text.CompositeView
javax.swing.text.BoxView
javax.swing.text.FlowView
javax.swing.text.ParagraphView
javax.swing.text.html.ParagraphView
All Implemented Interfaces:
SwingConstants, TabExpander 
public class ParagraphView extends ParagraphView
Displays the paragraph and uses CSS attributes for its configuration.

Nested Class Summary

Nested classes/interfaces declared in class javax.swing.text.FlowView

FlowView.FlowStrategy

Field Summary

Fields declared in class javax.swing.text.ParagraphView

firstLineIndent

Fields declared in class javax.swing.text.FlowView

layoutPool, layoutSpan, strategy

Fields declared in class javax.swing.text.View

BadBreakWeight, ExcellentBreakWeight, ForcedBreakWeight, GoodBreakWeight, X_AXIS, Y_AXIS

Fields declared in 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

Constructor Description
ParagraphView(Element elem)
Constructs a ParagraphView for the given element.

Method Summary

Modifier and Type Method Description
protected SizeRequirements calculateMinorAxisRequirements(int axis, SizeRequirements r)
Calculate the needs for the paragraph along the minor axis.
AttributeSet getAttributes()
Fetches the attributes to use when rendering.
float getMaximumSpan(int axis)
Determines the maximum span for this view along an axis.
float getMinimumSpan(int axis)
Determines the minimum span for this view along an axis.
float getPreferredSpan(int axis)
Determines the preferred span for this view.
protected StyleSheet getStyleSheet()
Convenient method to get the StyleSheet.
boolean isVisible()
Indicates whether or not this view should be displayed.
void paint(Graphics g, Shape a)
Renders using the given rendering surface and area on that surface.
void setParent(View parent)
Establishes the parent view for this view.
protected void setPropertiesFromAttributes()
Sets up the paragraph from css attributes instead of the values found in StyleConstants (i.e. which are used by the superclass).

Methods declared in class javax.swing.text.ParagraphView

breakView, changedUpdate, createRow, findOffsetToCharactersInString, flipEastAndWestAtEnds, getAlignment, getBreakWeight, getClosestPositionTo, getFlowSpan, getFlowStart, getLayoutView, getLayoutViewCount, getNextNorthSouthVisualPositionFrom, getPartialSize, getTabBase, getTabSet, nextTabStop, setFirstLineIndent, setJustification, setLineSpacing

Methods declared in class javax.swing.text.FlowView

getFlowAxis, getViewIndexAtPosition, insertUpdate, layout, loadChildren, removeUpdate

Methods declared in class javax.swing.text.BoxView

baselineLayout, baselineRequirements, calculateMajorAxisRequirements, childAllocation, forwardUpdate, getAxis, getChildAllocation, getHeight, getOffset, getResizeWeight, getSpan, getViewAtPoint, getWidth, isAfter, isAllocationValid, isBefore, isLayoutValid, layoutChanged, layoutMajorAxis, layoutMinorAxis, modelToView, paintChild, preferenceChanged, replace, setAxis, setSize, viewToModel

Methods declared in class javax.swing.text.CompositeView

getBottomInset, getInsideAllocation, getLeftInset, getNextEastWestVisualPositionFrom, getNextVisualPositionFrom, getRightInset, getTopInset, getView, getViewAtPosition, getViewCount, getViewIndex, modelToView, setInsets, setParagraphInsets

Methods declared in class javax.swing.text.View

append, breakView, createFragment, forwardUpdateToView, getBreakWeight, getContainer, getDocument, getElement, getEndOffset, getGraphics, getParent, getStartOffset, getToolTipText, getViewFactory, getViewIndex, insert, modelToView, remove, removeAll, updateChildren, updateLayout, viewToModel

Methods declared in class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

ParagraphView

public ParagraphView(Element elem)
Constructs a ParagraphView for the given element.
Parameters:
elem - the element that this view is responsible for

Method Details

setParent

public void setParent(View parent)
Establishes the parent view for this view. This is guaranteed to be called before any other methods if the parent view is functioning properly.

This is implemented to forward to the superclass as well as call the setPropertiesFromAttributes method to set the paragraph properties from the css attributes. The call is made at this time to ensure the ability to resolve upward through the parents view attributes.

Overrides:
setParent in class CompositeView
Parameters:
parent - the new parent, or null if the view is being removed from a parent it was previously added to

getAttributes

public AttributeSet getAttributes()
Fetches the attributes to use when rendering. This is implemented to multiplex the attributes specified in the model with a StyleSheet.
Overrides:
getAttributes in class View
Returns:
the attributes to use when rendering

setPropertiesFromAttributes

protected void setPropertiesFromAttributes()
Sets up the paragraph from css attributes instead of the values found in StyleConstants (i.e. which are used by the superclass). Since
Overrides:
setPropertiesFromAttributes in class ParagraphView

getStyleSheet

protected StyleSheet getStyleSheet()
Convenient method to get the StyleSheet.
Returns:
the StyleSheet

calculateMinorAxisRequirements

protected SizeRequirements calculateMinorAxisRequirements(int axis, SizeRequirements r)
Calculate the needs for the paragraph along the minor axis.

If size requirements are explicitly specified for the paragraph, use that requirements. Otherwise, use the requirements of the superclass ParagraphView.

If the axis parameter is neither View.X_AXIS nor View.Y_AXIS, IllegalArgumentException is thrown. If the r parameter is null, a new SizeRequirements object is created, otherwise the supplied SizeRequirements object is returned.

Overrides:
calculateMinorAxisRequirements in class ParagraphView
Parameters:
axis - the minor axis
r - the input SizeRequirements object
Returns:
the new or adjusted SizeRequirements object
Throws:
IllegalArgumentException - if the axis parameter is invalid
See Also:

isVisible

public boolean isVisible()
Indicates whether or not this view should be displayed. If none of the children wish to be displayed and the only visible child is the break that ends the paragraph, the paragraph will not be considered visible. Otherwise, it will be considered visible and return true.
Overrides:
isVisible in class View
Returns:
true if the paragraph should be displayed

paint

public void paint(Graphics g, Shape a)
Renders using the given rendering surface and area on that surface. This is implemented to delegate to the superclass after stashing the base coordinate for tab calculations.
Overrides:
paint in class ParagraphView
Parameters:
g - the rendering surface to use
a - the allocated region to render into
See Also:

getPreferredSpan

public float getPreferredSpan(int axis)
Determines the preferred span for this view. Returns 0 if the view is not visible, otherwise it calls the superclass method to get the preferred span. axis.
Overrides:
getPreferredSpan in class BoxView
Parameters:
axis - may be either View.X_AXIS or View.Y_AXIS
Returns:
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
See Also:

getMinimumSpan

public float getMinimumSpan(int axis)
Determines the minimum span for this view along an axis. Returns 0 if the view is not visible, otherwise it calls the superclass method to get the minimum span.
Overrides:
getMinimumSpan in class BoxView
Parameters:
axis - may be either View.X_AXIS or View.Y_AXIS
Returns:
the minimum span the view can be rendered into
See Also:

getMaximumSpan

public float getMaximumSpan(int axis)
Determines the maximum span for this view along an axis. Returns 0 if the view is not visible, otherwise it calls the superclass method ot get the maximum span.
Overrides:
getMaximumSpan in class BoxView
Parameters:
axis - may be either View.X_AXIS or View.Y_AXIS
Returns:
the maximum span the view can be rendered into
See Also:

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Documentation extracted from Debian's OpenJDK Development Kit package.
Licensed under the GNU General Public License, version 2, with the Classpath Exception.
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https://docs.oracle.com/en/java/javase/21/docs/api/java.desktop/javax/swing/text/html/ParagraphView.html