TopBlend:
Here is the
first difference.
There are 1 differences.
is old.
is new.
javax.swing.text
Class CompositeView
java.lang.Object
javax.swing.text.View
javax.swing.text.CompositeView
-
All Implemented Interfaces:
-
SwingConstants
-
Direct Known Subclasses:
-
BoxView
-
public abstract class CompositeView
- extends View
CompositeView is an abstract View implementation which manages one or more child views. (Note that CompositeView is intended for managing relatively small numbers of child views.) CompositeView is intended to be used as a starting point for View implementations, such as BoxView, that will contain child Views. Subclasses that wish to manage the collection of child Views should use the
replace(int, int, javax.swing.text.View[])
method. As View invokes replace during DocumentListener notification, you normally won't need to directly invoke replace.
While CompositeView does not impose a layout policy on its child Views, it does allow for inseting the child Views it will contain. The insets can be set by either
setInsets(short, short, short, short)
or
setParagraphInsets(javax.swing.text.AttributeSet)
.
In addition to the abstract methods of
View
, subclasses of CompositeView will need to override:
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
|
Method Summary
|
protected abstract void |
childAllocation
(int index,
Rectangle
a)
Returns the allocation for a given child. |
protected boolean |
flipEastAndWestAtEnds
(int position,
Position.Bias
bias)
Determines in which direction the next view lays. |
protected short |
getBottomInset
()
Gets the bottom inset. |
Shape
|
getChildAllocation
(int index,
Shape
a)
Fetches the allocation for the given child view to render into. |
protected
Rectangle
|
getInsideAllocation
(
Shape
a)
Translates the immutable allocation given to the view to a mutable allocation that represents the interior allocation (i.e. |
protected short |
getLeftInset
()
Gets the left inset. |
protected int |
getNextEastWestVisualPositionFrom
(int pos,
Position.Bias
b,
Shape
a, int direction,
Position.Bias
[] biasRet)
Returns the next visual position for the cursor, in either the east or west direction. |
protected int |
getNextNorthSouthVisualPositionFrom
(int pos,
Position.Bias
b,
Shape
a, int direction,
Position.Bias
[] biasRet)
Returns the next visual position for the cursor, in either the north or south direction. |
int |
getNextVisualPositionFrom
(int pos,
Position.Bias
b,
Shape
a, int direction,
Position.Bias
[] biasRet)
Provides a way to determine the next visually represented model location that one might place a caret. |
protected short |
getRightInset
()
Gets the right inset. |
protected short |
getTopInset
()
Gets the top inset. |
View
|
getView
(int n)
Returns the n-th view in this container. |
protected abstract
View
|
getViewAtPoint
(int x, int y,
Rectangle
alloc)
Fetches the child view at the given coordinates. |
protected
View
|
getViewAtPosition
(int pos,
Rectangle
a)
Fetches the child view that represents the given position in the model. |
int |
getViewCount
()
Returns the number of child views of this view. |
int |
getViewIndex
(int pos,
Position.Bias
b)
Returns the child view index representing the given position in the model. |
protected int |
getViewIndexAtPosition
(int pos)
Fetches the child view index representing the given position in the model. |
protected abstract boolean |
isAfter
(int x, int y,
Rectangle
alloc)
Tests whether a point lies after the rectangle range. |
protected abstract boolean |
isBefore
(int x, int y,
Rectangle
alloc)
Tests whether a point lies before the rectangle range. |
protected void |
loadChildren
(
ViewFactory
f)
Loads all of the children to initialize the view. |
Shape
|
modelToView
(int p0,
Position.Bias
b0, int p1,
Position.Bias
b1,
Shape
a)
Provides a mapping from the document model coordinate space to the coordinate space of the view mapped to it. |
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 |
replace
(int offset, int length,
View
[] views)
Replaces child views. |
protected void |
setInsets
(short top, short left, short bottom, short right)
Sets the insets for the view. |
protected void |
setParagraphInsets
(
AttributeSet
attr)
Sets the insets from the paragraph attributes specified in the given attributes. |
void |
setParent
(
View
parent)
Sets the parent of the view. |
int |
viewToModel
(float x, float y,
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.
View
|
append
,
breakView
,
changedUpdate
,
createFragment
,
forwardUpdate
,
forwardUpdateToView
,
getAlignment
,
getAttributes
,
getBreakWeight
,
getContainer
,
getDocument
,
getElement
,
getEndOffset
,
getGraphics
,
getMaximumSpan
,
getMinimumSpan
,
getParent
,
getPreferredSpan
,
getResizeWeight
,
getStartOffset
,
getToolTipText
,
getViewFactory
,
getViewIndex
,
insert
,
insertUpdate
,
isVisible
,
modelToView
,
paint
,
preferenceChanged
,
remove
,
removeAll
,
removeUpdate
,
setSize
,
updateChildren
,
updateLayout
,
viewToModel
|
Methods inherited from class java.lang.
Object
|
clone
,
equals
,
finalize
,
getClass
,
hashCode
,
notify
,
notifyAll
,
toString
,
wait
,
wait
,
wait
|
CompositeView
public CompositeView(Element elem)
-
Constructs a CompositeView for the given element.
-
Parameters:
-
elem - the element this view is responsible for
loadChildren
protected void loadChildren(ViewFactory f)
-
Loads all of the children to initialize the view. This is called by the
setParent(javax.swing.text.View)
method. Subclasses can reimplement this to initialize their child views in a different manner. The default implementation creates a child view for each child element.
-
-
Parameters:
-
f - the view factory
-
See Also:
-
setParent(javax.swing.text.View)
setParent
public void setParent(View parent)
-
Sets the parent of the view. This is reimplemented to provide the superclass behavior as well as calling the loadChildren method if this view does not already have children. The children should not be loaded in the constructor because the act of setting the parent may cause them to try to search up the hierarchy (to get the hosting Container for example). If this view has children (the view is being moved from one place in the view hierarchy to another), the loadChildren method will not be called.
-
-
Overrides:
-
setParent
in class
View
-
-
Parameters:
-
parent - the parent of the view, null if none
getViewCount
public int getViewCount()
-
Returns the number of child views of this view.
-
-
Overrides:
-
getViewCount
in class
View
-
-
Returns:
-
the number of views >= 0
-
See Also:
-
getView(int)
getView
public View getView(int n)
-
Returns the n-th view in this container.
-
-
Overrides:
-
getView
in class
View
-
-
Parameters:
-
n - the number of the desired view, >= 0 && < getViewCount()
-
Returns:
-
the view at index n
replace
public void replace(int offset,
int length,
View[] views)
-
Replaces child views. If there are no views to remove this acts as an insert. If there are no views to add this acts as a remove. Views being removed will have the parent set to null, and the internal reference to them removed so that they may be garbage collected.
-
-
Overrides:
-
replace
in class
View
-
-
Parameters:
-
offset - the starting index into the child views to insert the new views; >= 0 and <= getViewCount
-
length - the number of existing child views to remove; this should be a value >= 0 and <= (getViewCount() - offset)
-
views - the child views to add; this value can be null to indicate no children are being added (useful to remove)
getChildAllocation
public Shape getChildAllocation(int index,
Shape a)
-
Fetches the allocation for the given child view to render into. This enables finding out where various views are located.
-
-
Overrides:
-
getChildAllocation
in class
View
-
-
Parameters:
-
index - the index of the child, >= 0 && < getViewCount()
-
a - the allocation to this view
-
Returns:
-
the allocation to the child
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.
-
-
Specified by:
-
modelToView
in class
View
-
-
Parameters:
-
pos - the position to convert >= 0
-
a - the allocated region to render into
-
b - a bias value of either Position.Bias.Forward or 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)
modelToView
public Shape modelToView(int p0,
Position.Bias b0,
int p1,
Position.Bias b1,
Shape a)
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
View
-
-
Parameters:
-
p0 - the position to convert >= 0
-
b0 - the bias toward the previous character or the next character represented by p0, in case the position is a boundary of two views; either Position.Bias.Forward or Position.Bias.Backward
-
p1 - the position to convert >= 0
-
b1 - the bias toward the previous character or the next character represented by p1, in case the position is a boundary of two views
-
a - the allocated region to render into
-
Returns:
-
the bounding box of the given position is returned
-
Throws:
-
BadLocationException
- if the given position does not represent a valid location in the associated document
-
IllegalArgumentException
- for an invalid bias argument
-
See Also:
-
View.viewToModel(float, float, java.awt.Shape, javax.swing.text.Position.Bias[])
viewToModel
public int viewToModel(float x,
float y,
Shape a,
Position.Bias[] bias)
-
Provides a mapping from the view coordinate space to the logical coordinate space of the model.
-
-
Specified by:
-
viewToModel
in class
View
-
-
Parameters:
-
x - x coordinate of the view location to convert >= 0
-
y - y coordinate of the view location to convert >= 0
-
a - the allocated region to render into
-
bias - either Position.Bias.Forward or Position.Bias.Backward
-
Returns:
-
the location within the model that best represents the given point in the view >= 0
-
See Also:
-
View.viewToModel(float, float, java.awt.Shape, javax.swing.text.Position.Bias[])
getNextVisualPositionFrom
public int getNextVisualPositionFrom(int pos,
Position.Bias b,
Shape a,
int direction,
Position.Bias[] biasRet)
throws BadLocationException
-
Provides a way to determine the next visually represented model location that one might place a caret. Some views may not be visible, they might not be in the same order found in the model, or they just might not allow access to some of the locations in the model. This is a convenience method for
getNextNorthSouthVisualPositionFrom(int, javax.swing.text.Position.Bias, java.awt.Shape, int, javax.swing.text.Position.Bias[])
and
getNextEastWestVisualPositionFrom(int, javax.swing.text.Position.Bias, java.awt.Shape, int, javax.swing.text.Position.Bias[])
.
-
-
Overrides:
-
getNextVisualPositionFrom
in class
View
-
-
Parameters:
-
pos - the position to convert >= 0
-
b - a bias value of either Position.Bias.Forward or Position.Bias.Backward
-
a - the allocated region to render into
-
direction - the direction from the current position that can be thought of as the arrow keys typically found on a keyboard; this may be one of the following:
-
SwingConstants.WEST
-
SwingConstants.EAST
-
SwingConstants.NORTH
-
SwingConstants.SOUTH
-
biasRet - an array containing the bias that was checked
-
Returns:
-
the location within the model that best represents the next location visual position
-
Throws:
-
BadLocationException
-
IllegalArgumentException
- if direction is invalid
getViewIndex
public int getViewIndex(int pos,
Position.Bias b)
-
Returns the child view index representing the given position in the model. This is implemented to call the getViewIndexByPosition method for backward compatibility.
-
-
Overrides:
-
getViewIndex
in class
View
-
-
Parameters:
-
pos - the position >= 0
-
Returns:
-
index of the view representing the given position, or -1 if no view represents that position
-
Since:
-
1.3
isBefore
protected abstract boolean isBefore(int x,
int y,
Rectangle alloc)
-
Tests whether a point lies before the rectangle range.
-
-
Parameters:
-
x - the X coordinate >= 0
-
y - the Y coordinate >= 0
-
alloc - the rectangle
-
Returns:
-
true if the point is before the specified range
isAfter
protected abstract boolean isAfter(int x,
int y,
Rectangle alloc)
-
Tests whether a point lies after the rectangle range.
-
-
Parameters:
-
x - the X coordinate >= 0
-
y - the Y coordinate >= 0
-
alloc - the rectangle
-
Returns:
-
true if the point is after the specified range
getViewAtPoint
protected abstract View getViewAtPoint(int x,
int y,
Rectangle alloc)
-
Fetches the child view at the given coordinates.
-
-
Parameters:
-
x - the X coordinate >= 0
-
y - the Y coordinate >= 0
-
alloc - the parent's allocation on entry, which should be changed to the child's allocation on exit
-
Returns:
-
the child view
childAllocation
protected abstract void childAllocation(int index,
Rectangle a)
-
Returns the allocation for a given child.
-
-
Parameters:
-
index - the index of the child, >= 0 && < getViewCount()
-
a - the allocation to the interior of the box on entry, and the allocation of the child view at the index on exit.
getViewAtPosition
protected View getViewAtPosition(int pos,
Rectangle a)
-
Fetches the child view that represents the given position in the model. This is implemented to fetch the view in the case where there is a child view for each child element.
-
-
Parameters:
-
pos - the position >= 0
-
a - the allocation to the interior of the box on entry, and the allocation of the view containing the position on exit
-
Returns:
-
the view representing the given position, or null if there isn't one
getViewIndexAtPosition
protected int getViewIndexAtPosition(int pos)
-
Fetches the child view index representing the given position in the model. This is implemented to fetch the view in the case where there is a child view for each child element.
-
-
Parameters:
-
pos - the position >= 0
-
Returns:
-
index of the view representing the given position, or -1 if no view represents that position
getInsideAllocation
protected Rectangle getInsideAllocation(Shape a)
-
Translates the immutable allocation given to the view to a mutable allocation that represents the interior allocation (i.e. the bounds of the given allocation with the top, left, bottom, and right insets removed. It is expected that the returned value would be further mutated to represent an allocation to a child view. This is implemented to reuse an instance variable so it avoids creating excessive Rectangles. Typically the result of calling this method would be fed to the childAllocation method.
-
-
Parameters:
-
a - the allocation given to the view
-
Returns:
-
the allocation that represents the inside of the view after the margins have all been removed; if the given allocation was null, the return value is null
setParagraphInsets
protected void setParagraphInsets(AttributeSet attr)
-
Sets the insets from the paragraph attributes specified in the given attributes.
-
-
Parameters:
-
attr - the attributes
setInsets
protected void setInsets(short top,
short left,
short bottom,
short right)
-
Sets the insets for the view.
-
-
Parameters:
-
top - the top inset >= 0
-
left - the left inset >= 0
-
bottom - the bottom inset >= 0
-
right - the right inset >= 0
getLeftInset
protected short getLeftInset()
-
Gets the left inset.
-
-
Returns:
-
the inset >= 0
getRightInset
protected short getRightInset()
-
Gets the right inset.
-
-
Returns:
-
the inset >= 0
getTopInset
protected short getTopInset()
-
Gets the top inset.
-
-
Returns:
-
the inset >= 0
getBottomInset
protected short getBottomInset()
-
Gets the bottom inset.
-
-
Returns:
-
the inset >= 0
getNextNorthSouthVisualPositionFrom
protected int getNextNorthSouthVisualPositionFrom(int pos,
Position.Bias b,
Shape a,
int direction,
Position.Bias[] biasRet)
throws BadLocationException
-
Returns the next visual position for the cursor, in either the north or south direction.
-
-
Parameters:
-
pos - the position to convert >= 0
-
b - a bias value of either Position.Bias.Forward or Position.Bias.Backward
-
a - the allocated region to render into
-
direction - the direction from the current position that can be thought of as the arrow keys typically found on a keyboard; this may be one of the following:
-
SwingConstants.NORTH
-
SwingConstants.SOUTH
-
biasRet - an array containing the bias that was checked
-
Returns:
-
the location within the model that best represents the next north or south location
-
Throws:
-
BadLocationException
-
IllegalArgumentException
- if direction is invalid
-
See Also:
-
getNextVisualPositionFrom(int, javax.swing.text.Position.Bias, java.awt.Shape, int, javax.swing.text.Position.Bias[])
getNextEastWestVisualPositionFrom
protected int getNextEastWestVisualPositionFrom(int pos,
Position.Bias b,
Shape a,
int direction,
Position.Bias[] biasRet)
throws BadLocationException
-
Returns the next visual position for the cursor, in either the east or west direction.
-
-
Parameters:
-
pos - the position to convert >= 0
-
b - a bias value of either Position.Bias.Forward or Position.Bias.Backward
-
a - the allocated region to render into
-
direction - the direction from the current position that can be thought of as the arrow keys typically found on a keyboard; this may be one of the following:
-
SwingConstants.WEST
-
SwingConstants.EAST
-
biasRet - an array containing the bias that was checked
-
Returns:
-
the location within the model that best represents the next west or east location
-
Throws:
-
BadLocationException
-
IllegalArgumentException
- if direction is invalid
-
See Also:
-
getNextVisualPositionFrom(int, javax.swing.text.Position.Bias, java.awt.Shape, int, javax.swing.text.Position.Bias[])
flipEastAndWestAtEnds
protected boolean flipEastAndWestAtEnds(int position,
Position.Bias bias)
-
Determines in which direction the next view lays. Consider the View at index n. Typically the Views are layed out from left to right, so that the View to the EAST will be at index n + 1, and the View to the WEST will be at index n - 1. In certain situations, such as with bidirectional text, it is possible that the View to EAST is not at index n + 1, but rather at index n - 1, or that the View to the WEST is not at index n - 1, but index n + 1. In this case this method would return true, indicating the Views are layed out in descending order.
This unconditionally returns false, subclasses should override this method if there is the possibility for laying Views in descending order.
-
-
Parameters:
-
position - position into the model
-
bias - either Position.Bias.Forward or Position.Bias.Backward
-
Returns:
-
false