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java.lang.Objectjavax.swing.text.View
javax.swing.text.ComponentView
public class ComponentView
A View
implementation that is able to render arbitrary
Component
s. This uses the attribute
StyleConstants.ComponentAttribute
to determine the
Component
that should be rendered. This Component
becomes a direct child of the JTextComponent
that contains
this ComponentView
, so this view must not be shared between
multiple JTextComponent
s.
Field Summary |
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Fields inherited from class javax.swing.text.View |
---|
BadBreakWeight, ExcellentBreakWeight, ForcedBreakWeight, GoodBreakWeight, X_AXIS, Y_AXIS |
Fields inherited from interface javax.swing.SwingConstants |
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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 | |
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ComponentView(Element elem)
Creates a new instance of ComponentView for the specified
Element . |
Method Summary | |
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protected Component |
createComponent()
Creates the Component that this View is
rendering. |
float |
getAlignment(int axis)
Returns the alignment of this View along the specified axis. |
Component |
getComponent()
Returns the Component that is rendered by this
ComponentView . |
float |
getMaximumSpan(int axis)
Returns the maximum span of this View along the specified
axis. |
float |
getMinimumSpan(int axis)
Returns the minimum span along the specified axis. |
float |
getPreferredSpan(int axis)
Returns the preferred span along the specified axis. |
Shape |
modelToView(int pos,
Shape a,
Position.Bias b)
Maps a position in the document into the coordinate space of the View. |
void |
paint(Graphics g,
Shape a)
The real painting behavour is performed by normal component painting, triggered by the text component that hosts this view. |
void |
setParent(View p)
This sets up the component when the view is added to its parent, or cleans up the view when it is removed from its parent. |
int |
viewToModel(float x,
float y,
Shape a,
Position.Bias[] b)
Maps coordinates from the View 's space into a position
in the document model. |
Methods inherited from class javax.swing.text.View |
---|
append, breakView, changedUpdate, createFragment, dump, forwardUpdate, forwardUpdateToView, getAttributes, getBreakWeight, getChildAllocation, getContainer, getDocument, getElement, getEndOffset, getGraphics, getNextVisualPositionFrom, getParent, getResizeWeight, getStartOffset, getToolTipText, getView, getViewCount, getViewFactory, getViewIndex, getViewIndex, insert, insertUpdate, isVisible, modelToView, modelToView, preferenceChanged, remove, removeAll, removeUpdate, replace, setSize, updateChildren, updateLayout, viewToModel |
Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Constructor Detail |
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public ComponentView(Element elem)
ComponentView
for the specified
Element
.
elem
- the element that this View
is renderingMethod Detail |
---|
protected Component createComponent()
Component
that this View
is
rendering. The Component
is determined using
the StyleConstants.ComponentAttribute
of the associated
Element
.
public float getAlignment(int axis)
View
along the specified axis.
getAlignment
in class View
axis
- either View.X_AXIS
or View.Y_AXIS
View
along the specified axispublic final Component getComponent()
Component
that is rendered by this
ComponentView
.
Component
that is rendered by this
ComponentView
public float getMaximumSpan(int axis)
View
along the specified
axis.
This will return Component.getMaximumSize()
for the specified
axis.
getMaximumSpan
in class View
axis
- the axis
View
along the specified
axispublic float getMinimumSpan(int axis)
View
View.getPreferredSpan(int)
unless View.getResizeWeight(int)
returns a value > 0, in which case this returns 0
.
getMinimumSpan
in class View
axis
- the axis
public float getPreferredSpan(int axis)
View
getPreferredSpan
in class View
axis
- the axis
public Shape modelToView(int pos, Shape a, Position.Bias b) throws BadLocationException
View
modelToView
in class View
pos
- the position of the character in the modela
- the area that is occupied by the viewb
- either Position.Bias.Forward
or
Position.Bias.Backward
depending on the preferred
direction bias. If null
this defaults to
Position.Bias.Forward
BadLocationException
- if pos
is invalidpublic void paint(Graphics g, Shape a)
paint
in class View
g
- the graphics contexta
- the allocation of the childpublic void setParent(View p)
p
is
null
, then the view is removed from it's parent and we have
to also remove the component from it's parent container.
setParent
in class View
p
- the parent view or null
if this view is removed
from it's parentpublic int viewToModel(float x, float y, Shape a, Position.Bias[] b)
View
's space into a position
in the document model.
viewToModel
in class View
x
- the x coordinate in the view spacey
- the y coordinate in the view spacea
- the allocation of this View
b
- the bias to use
x, y
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