net.thevpc.common.swing.iswing

Interface IJTextComponent

All Superinterfaces:

IComponent, IContainer, IJComponent

public interface IJTextComponent
extends IJComponent

Method Summary

Modifier and Type	Method and Description
void	addCaretListener(CaretListener listener) Adds a caret listener for notification of any changes to the caret.
void	copy() Transfers the currently selected range in the associated text model to the system clipboard, leaving the contents in the text model.
void	cut() Transfers the currently selected range in the associated text model to the system clipboard, removing the contents from the model.
AccessibleContext	getAccessibleContext() Gets the AccessibleContext associated with this JTextComponent.
Action[]	getActions() Fetches the command list for the editor.
Caret	getCaret() Fetches the caret that allows text-oriented navigation over the view.
Color	getCaretColor() Fetches the current color used to render the caret.
CaretListener[]	getCaretListeners() Returns an array of all the caret listeners registered on this text component.
int	getCaretPosition() Returns the position of the text insertion caret for the text component.
Color	getDisabledTextColor() Fetches the current color used to render the selected text.
Document	getDocument() Fetches the model associated with the editor.
boolean	getDragEnabled() Gets the dragEnabled property.
char	getFocusAccelerator() Returns the key accelerator that will cause the receiving text component to get the focus.
Highlighter	getHighlighter() Fetches the object responsible for making highlights.
Keymap	getKeymap() Fetches the keymap currently active in this text component.
Insets	getMargin() Returns the margin between the text component's border and its text.
NavigationFilter	getNavigationFilter() Returns the NavigationFilter.
Dimension	getPreferredScrollableViewportSize() Returns the preferred size of the viewport for a view component.
int	getScrollableBlockIncrement(Rectangle visibleRect, int orientation, int direction) Components that display logical rows or columns should compute the scroll increment that will completely expose one block of rows or columns, depending on the value of orientation.
boolean	getScrollableTracksViewportHeight() Returns true if a viewport should always force the height of this Scrollable to match the height of the viewport.
boolean	getScrollableTracksViewportWidth() Returns true if a viewport should always force the width of this Scrollable to match the width of the viewport.
int	getScrollableUnitIncrement(Rectangle visibleRect, int orientation, int direction) Components that display logical rows or columns should compute the scroll increment that will completely expose one new row or column, depending on the value of orientation.
String	getSelectedText() Returns the selected text contained in this TextComponent.
Color	getSelectedTextColor() Fetches the current color used to render the selected text.
Color	getSelectionColor() Fetches the current color used to render the selection.
int	getSelectionEnd() Returns the selected text's end position.
int	getSelectionStart() Returns the selected text's start position.
String	getText() Returns the text contained in this TextComponent.
String	getText(int offs, int len) Fetches a portion of the text represented by the component.
String	getToolTipText(MouseEvent event) Returns the string to be used as the tooltip for event.
boolean	isEditable() Returns the boolean indicating whether this TextComponent is editable or not.
Rectangle	modelToView(int pos) Converts the given location in the model to a place in the view coordinate system.
void	moveCaretPosition(int pos) Moves the caret to a new position, leaving behind a mark defined by the last time setCaretPosition was called.
void	paste() Transfers the contents of the system clipboard into the associated text model.
void	read(Reader in, Object desc) Initializes from a stream.
void	removeCaretListener(CaretListener listener) Removes a caret listener.
void	removeNotify()
void	replaceSelection(String content) Replaces the currently selected content with new content represented by the given string.
void	select(int selectionStart, int selectionEnd) Selects the text between the specified start and end positions.
void	selectAll() Selects all the text in the TextComponent.
void	setCaret(Caret c) Sets the caret to be used.
void	setCaretColor(Color c) Sets the current color used to render the caret.
void	setCaretPosition(int position) Sets the position of the text insertion caret for the TextComponent.
void	setComponentOrientation(ComponentOrientation o)
void	setDisabledTextColor(Color c) Sets the current color used to render the disabled text.
void	setDocument(Document doc) Associates the editor with a text document.
void	setDragEnabled(boolean b) Sets the dragEnabled property, which must be true to enable automatic drag handling (the first part of drag and drop) on this component.
void	setEditable(boolean b) Sets the specified boolean to indicate whether or not this TextComponent should be editable.
void	setFocusAccelerator(char aKey) Sets the key accelerator that will cause the receiving text component to get the focus.
void	setHighlighter(Highlighter h) Sets the highlighter to be used.
void	setKeymap(Keymap map) Sets the keymap to use for binding events to actions.
void	setMargin(Insets m) Sets margin space between the text component's border and its text.
void	setNavigationFilter(NavigationFilter filter) Sets the NavigationFilter.
void	setSelectedTextColor(Color c) Sets the current color used to render the selected text.
void	setSelectionColor(Color c) Sets the current color used to render the selection.
void	setSelectionEnd(int selectionEnd) Sets the selection end to the specified position.
void	setSelectionStart(int selectionStart) Sets the selection start to the specified position.
void	setText(String t) Sets the text of this TextComponent to the specified text.
int	viewToModel(Point pt) Converts the given place in the view coordinate system to the nearest representative location in the model.
void	write(Writer out) Stores the contents of the model into the given stream.

Methods inherited from interface net.thevpc.common.swing.iswing.IJComponent

addPropertyChangeListener, addPropertyChangeListener, getClientProperty, getComponentPopupMenu, putClientProperty, removePropertyChangeListener, removePropertyChangeListener, setBorder, setTransferHandler, updateUI

Methods inherited from interface net.thevpc.common.swing.iswing.IContainer

add, add, addContainerListener, getComponentAt, getLayout, removeContainerListener, setLayout

Methods inherited from interface net.thevpc.common.swing.iswing.IComponent

addFocusListener, addKeyListener, addMouseListener, getLocationOnScreen, isEnabled, removeFocusListener, removeKeyListener, removeMouseListener, repaint, setEnabled

Method Detail

addCaretListener

void addCaretListener(CaretListener listener)

Adds a caret listener for notification of any changes to the caret.

Parameters:

listener - the listener to be added

See Also:

CaretEvent

removeCaretListener

void removeCaretListener(CaretListener listener)

Removes a caret listener.

Parameters:

listener - the listener to be removed

See Also:

CaretEvent

getCaretListeners

CaretListener[] getCaretListeners()

Returns an array of all the caret listeners registered on this text component.

Returns:

all of this component's CaretListeners or an empty array if no caret listeners are currently registered

Since:

1.4

See Also:

addCaretListener(javax.swing.event.CaretListener), removeCaretListener(javax.swing.event.CaretListener)

setDocument

void setDocument(Document doc)

Associates the editor with a text document. The currently registered factory is used to build a view for the document, which gets displayed by the editor after revalidation. A PropertyChange event ("document") is propagated to each listener.

Parameters:

doc - the document to display/edit bound: true expert: true

See Also:

getDocument()

getDocument

Document getDocument()

Fetches the model associated with the editor. This is primarily for the UI to get at the minimal amount of state required to be a text editor. Subclasses will return the actual type of the model which will typically be something that extends Document.

Returns:

the model

setComponentOrientation

void setComponentOrientation(ComponentOrientation o)

getActions

Action[] getActions()

Fetches the command list for the editor. This is the list of commands supported by the plugged-in UI augmented by the collection of commands that the editor itself supports. These are useful for binding to events, such as in a keymap.

Returns:

the command list

setMargin

void setMargin(Insets m)

Sets margin space between the text component's border and its text. The text component's default Border object will use this value to create the proper margin. However, if a non-default border is set on the text component, it is that Border object's responsibility to create the appropriate margin space (else this property will effectively be ignored). This causes a redraw of the component. A PropertyChange event ("margin") is sent to all listeners.

Parameters:

m - the space between the border and the text bound: true

getMargin

Insets getMargin()

Returns the margin between the text component's border and its text.

Returns:

the margin

setNavigationFilter

void setNavigationFilter(NavigationFilter filter)

Sets the NavigationFilter. NavigationFilter is used by DefaultCaret and the default cursor movement actions as a way to restrict the cursor movement.

Since:

1.4

getNavigationFilter

NavigationFilter getNavigationFilter()

Returns the NavigationFilter. NavigationFilter is used by DefaultCaret and the default cursor movement actions as a way to restrict the cursor movement. A null return value implies the cursor movement and selection should not be restricted.

Returns:

the NavigationFilter

Since:

1.4

getCaret

Caret getCaret()

Fetches the caret that allows text-oriented navigation over the view.

Returns:

the caret

setCaret

void setCaret(Caret c)

Sets the caret to be used. By default this will be set by the UI that gets installed. This can be changed to a custom caret if desired. Setting the caret results in a PropertyChange event ("caret") being fired.

Parameters:

c - the caret bound: true expert: true

See Also:

getCaret()

getHighlighter

Highlighter getHighlighter()

Fetches the object responsible for making highlights.

Returns:

the highlighter

setHighlighter

void setHighlighter(Highlighter h)

Sets the highlighter to be used. By default this will be set by the UI that gets installed. This can be changed to a custom highlighter if desired. The highlighter can be set to null to disable it. A PropertyChange event ("highlighter") is fired when a new highlighter is installed.

Parameters:

h - the highlighter bound: true expert: true

See Also:

getHighlighter()

setKeymap

void setKeymap(Keymap map)

Sets the keymap to use for binding events to actions. Setting to null effectively disables keyboard input. A PropertyChange event ("keymap") is fired when a new keymap is installed.

Parameters:

map - the keymap bound: true

See Also:

getKeymap()

setDragEnabled

void setDragEnabled(boolean b)

Sets the dragEnabled property, which must be true to enable automatic drag handling (the first part of drag and drop) on this component. The transferHandler property needs to be set to a non-null value for the drag to do anything. The default value of the dragEnabled property is false.

When automatic drag handling is enabled, most look and feels begin a drag-and-drop operation whenever the user presses the mouse button over a selection and then moves the mouse a few pixels. Setting this property to true can therefore have a subtle effect on how selections behave.

Some look and feels might not support automatic drag and drop; they will ignore this property. You can work around such look and feels by modifying the component to directly call the exportAsDrag method of a TransferHandler.

Parameters:

b - the value to set the dragEnabled property to

Throws:

HeadlessException - if b is true and GraphicsEnvironment.isHeadless() returns true bound: false

Since:

1.4

See Also:

GraphicsEnvironment.isHeadless(), getDragEnabled(), IJComponent.setTransferHandler(javax.swing.TransferHandler), TransferHandler

getDragEnabled

boolean getDragEnabled()

Gets the dragEnabled property.

Returns:

the value of the dragEnabled property

Since:

1.4

See Also:

setDragEnabled(boolean)

getKeymap

Keymap getKeymap()

Fetches the keymap currently active in this text component.

Returns:

the keymap

getCaretColor

Color getCaretColor()

Fetches the current color used to render the caret.

Returns:

the color

setCaretColor

void setCaretColor(Color c)

Sets the current color used to render the caret. Setting to null effectively restores the default color. Setting the color results in a PropertyChange event ("caretColor") being fired.

Parameters:

c - the color bound: true preferred: true

See Also:

getCaretColor()

getSelectionColor

Color getSelectionColor()

Fetches the current color used to render the selection.

Returns:

the color

setSelectionColor

void setSelectionColor(Color c)

Sets the current color used to render the selection. Setting the color to null is the same as setting Color.white. Setting the color results in a PropertyChange event ("selectionColor").

Parameters:

c - the color bound: true preferred: true

See Also:

getSelectionColor()

getSelectedTextColor

Color getSelectedTextColor()

Fetches the current color used to render the selected text.

Returns:

the color

setSelectedTextColor

void setSelectedTextColor(Color c)

Sets the current color used to render the selected text. Setting the color to null is the same as Color.black. Setting the color results in a PropertyChange event ("selectedTextColor") being fired.

Parameters:

c - the color bound: true preferred: true

See Also:

getSelectedTextColor()

getDisabledTextColor

Color getDisabledTextColor()

Fetches the current color used to render the selected text.

Returns:

the color

setDisabledTextColor

void setDisabledTextColor(Color c)

Sets the current color used to render the disabled text. Setting the color fires off a PropertyChange event ("disabledTextColor").

Parameters:

c - the color bound: true preferred: true

See Also:

getDisabledTextColor()

replaceSelection

void replaceSelection(String content)

Replaces the currently selected content with new content represented by the given string. If there is no selection this amounts to an insert of the given text. If there is no replacement text this amounts to a removal of the current selection.

This is the method that is used by the default implementation of the action for inserting content that gets bound to the keymap actions.

This method is thread safe, although most Swing methods are not. Please see Threads and Swing for more information.

Parameters:

content - the content to replace the selection with

getText

String getText(int offs,
               int len)
        throws BadLocationException

Fetches a portion of the text represented by the component. Returns an empty string if length is 0.

Parameters:

offs - the offset >= 0

len - the length >= 0

Returns:

the text

Throws:

BadLocationException - if the offset or length are invalid

modelToView

Rectangle modelToView(int pos)
               throws BadLocationException

Converts the given location in the model to a place in the view coordinate system. The component must have a positive size for this translation to be computed (i.e. layout cannot be computed until the component has been sized). The component does not have to be visible or painted.

Parameters:

pos - the position >= 0

Returns:

the coordinates as a rectangle, with (r.x, r.y) as the location in the coordinate system, or null if the component does not yet have a positive size.

Throws:

BadLocationException - if the given position does not represent a valid location in the associated document

See Also:

TextUI.modelToView(javax.swing.text.JTextComponent, int)

viewToModel

int viewToModel(Point pt)

Converts the given place in the view coordinate system to the nearest representative location in the model. The component must have a positive size for this translation to be computed (i.e. layout cannot be computed until the component has been sized). The component does not have to be visible or painted.

Parameters:

pt - the location in the view to translate

Returns:

the offset >= 0 from the start of the document, or -1 if the component does not yet have a positive size.

See Also:

TextUI.viewToModel(javax.swing.text.JTextComponent, java.awt.Point)

cut

void cut()

Transfers the currently selected range in the associated text model to the system clipboard, removing the contents from the model. The current selection is reset. Does nothing for null selections.

See Also:

Toolkit.getSystemClipboard(), Clipboard

copy

void copy()

Transfers the currently selected range in the associated text model to the system clipboard, leaving the contents in the text model. The current selection remains intact. Does nothing for null selections.

See Also:

Toolkit.getSystemClipboard(), Clipboard

paste

void paste()

Transfers the contents of the system clipboard into the associated text model. If there is a selection in the associated view, it is replaced with the contents of the clipboard. If there is no selection, the clipboard contents are inserted in front of the current insert position in the associated view. If the clipboard is empty, does nothing.

See Also:

replaceSelection(java.lang.String), Toolkit.getSystemClipboard(), Clipboard

moveCaretPosition

void moveCaretPosition(int pos)

Moves the caret to a new position, leaving behind a mark defined by the last time setCaretPosition was called. This forms a selection. If the document is null, does nothing. The position must be between 0 and the length of the component's text or else an exception is thrown.

Parameters:

pos - the position

Throws:

IllegalArgumentException - if the value supplied for position is less than zero or greater than the component's text length

See Also:

setCaretPosition(int)

setFocusAccelerator

void setFocusAccelerator(char aKey)

Sets the key accelerator that will cause the receiving text component to get the focus. The accelerator will be the key combination of the alt key and the character given (converted to upper case). By default, there is no focus accelerator key. Any previous key accelerator setting will be superseded. A '\0' key setting will be registered, and has the effect of turning off the focus accelerator. When the new key is set, a PropertyChange event (FOCUS_ACCELERATOR_KEY) will be fired.

Parameters:

aKey - the key bound: true

See Also:

getFocusAccelerator()

getFocusAccelerator

char getFocusAccelerator()

Returns the key accelerator that will cause the receiving text component to get the focus. Return '\0' if no focus accelerator has been set.

Returns:

the key

read

void read(Reader in,
          Object desc)
   throws IOException

Initializes from a stream. This creates a model of the type appropriate for the component and initializes the model from the stream. By default this will load the model as plain text. Previous contents of the model are discarded.

Parameters:

in - the stream to read from

desc - an object describing the stream; this might be a string, a File, a URL, etc. Some kinds of documents (such as html for example) might be able to make use of this information; if non-null, it is added as a property of the document

Throws:

IOException - as thrown by the stream being used to initialize

See Also:

EditorKit.createDefaultDocument(), setDocument(javax.swing.text.Document), PlainDocument

write

void write(Writer out)
    throws IOException

Stores the contents of the model into the given stream. By default this will store the model as plain text.

Parameters:

out - the output stream

Throws:

IOException - on any I/O error

removeNotify

void removeNotify()

setCaretPosition

void setCaretPosition(int position)

Sets the position of the text insertion caret for the TextComponent. Note that the caret tracks change, so this may move if the underlying text of the component is changed. If the document is null, does nothing. The position must be between 0 and the length of the component's text or else an exception is thrown.

Parameters:

position - the position

Throws:

IllegalArgumentException - if the value supplied for position is less than zero or greater than the component's text length

getCaretPosition

int getCaretPosition()

Returns the position of the text insertion caret for the text component.

Returns:

the position of the text insertion caret for the text component >= 0

setText

void setText(String t)

Sets the text of this TextComponent to the specified text. If the text is null or empty, has the effect of simply deleting the old text. When text has been inserted, the resulting caret location is determined by the implementation of the caret class.

This method is thread safe, although most Swing methods are not. Please see Threads and Swing for more information.

Note that text is not a bound property, so no PropertyChangeEvent is fired when it changes. To listen for changes to the text, use DocumentListener.

Parameters:

t - the new text to be set

See Also:

getText(int, int), DefaultCaret

getText

String getText()

Returns the text contained in this TextComponent. If the underlying document is null, will give a NullPointerException.

Note that text is not a bound property, so no PropertyChangeEvent is fired when it changes. To listen for changes to the text, use DocumentListener.

Returns:

the text

Throws:

NullPointerException - if the document is null

See Also:

setText(java.lang.String)

getSelectedText

String getSelectedText()

Returns the selected text contained in this TextComponent. If the selection is null or the document empty, returns null.

Returns:

the text

Throws:

IllegalArgumentException - if the selection doesn't have a valid mapping into the document for some reason

See Also:

setText(java.lang.String)

isEditable

boolean isEditable()

Returns the boolean indicating whether this TextComponent is editable or not.

Returns:

the boolean value

See Also:

setEditable(boolean)

setEditable

void setEditable(boolean b)

Sets the specified boolean to indicate whether or not this TextComponent should be editable. A PropertyChange event ("editable") is fired when the state is changed.

Parameters:

b - the boolean to be set bound: true

See Also:

isEditable()

getSelectionStart

int getSelectionStart()

Returns the selected text's start position. Return 0 for an empty document, or the value of dot if no selection.

Returns:

the start position >= 0

setSelectionStart

void setSelectionStart(int selectionStart)

Sets the selection start to the specified position. The new starting point is constrained to be before or at the current selection end.

This is available for backward compatibility to code that called this method on java.awt.TextComponent. This is implemented to forward to the Caret implementation which is where the actual selection is maintained.

Parameters:

selectionStart - the start position of the text >= 0

getSelectionEnd

int getSelectionEnd()

Returns the selected text's end position. Return 0 if the document is empty, or the value of dot if there is no selection.

Returns:

the end position >= 0

setSelectionEnd

void setSelectionEnd(int selectionEnd)

Sets the selection end to the specified position. The new end point is constrained to be at or after the current selection start.

This is available for backward compatibility to code that called this method on java.awt.TextComponent. This is implemented to forward to the Caret implementation which is where the actual selection is maintained.

Parameters:

selectionEnd - the end position of the text >= 0

select

void select(int selectionStart,
            int selectionEnd)

Selects the text between the specified start and end positions.

This method sets the start and end positions of the selected text, enforcing the restriction that the start position must be greater than or equal to zero. The end position must be greater than or equal to the start position, and less than or equal to the length of the text component's text.

If the caller supplies values that are inconsistent or out of bounds, the method enforces these constraints silently, and without failure. Specifically, if the start position or end position is greater than the length of the text, it is reset to equal the text length. If the start position is less than zero, it is reset to zero, and if the end position is less than the start position, it is reset to the start position.

This call is provided for backward compatibility. It is routed to a call to setCaretPosition followed by a call to moveCaretPosition. The preferred way to manage selection is by calling those methods directly.

Parameters:

selectionStart - the start position of the text

selectionEnd - the end position of the text

See Also:

setCaretPosition(int), moveCaretPosition(int)

selectAll

void selectAll()

Selects all the text in the TextComponent. Does nothing on a null or empty document.

getToolTipText

String getToolTipText(MouseEvent event)

Returns the string to be used as the tooltip for event. This will return one of:

1. If setToolTipText has been invoked with a non-null value, it will be returned, otherwise
2. The value from invoking getToolTipText on the UI will be returned.

By default JTextComponent does not register itself with the ToolTipManager. This means that tooltips will NOT be shown from the TextUI unless registerComponent has been invoked on the ToolTipManager.

Parameters:

event - the event in question

Returns:

the string to be used as the tooltip for event

See Also:

JComponent.setToolTipText(java.lang.String), TextUI.getToolTipText(javax.swing.text.JTextComponent, java.awt.Point), ToolTipManager.registerComponent(javax.swing.JComponent)

getPreferredScrollableViewportSize

Dimension getPreferredScrollableViewportSize()

Returns the preferred size of the viewport for a view component. This is implemented to do the default behavior of returning the preferred size of the component.

Returns:

the preferredSize of a JViewport whose view is this Scrollable

getScrollableUnitIncrement

int getScrollableUnitIncrement(Rectangle visibleRect,
                               int orientation,
                               int direction)

Components that display logical rows or columns should compute the scroll increment that will completely expose one new row or column, depending on the value of orientation. Ideally, components should handle a partially exposed row or column by returning the distance required to completely expose the item.

The default implementation of this is to simply return 10% of the visible area. Subclasses are likely to be able to provide a much more reasonable value.

Parameters:

visibleRect - the view area visible within the viewport

orientation - either SwingConstants.VERTICAL or SwingConstants.HORIZONTAL

direction - less than zero to scroll up/left, greater than zero for down/right

Returns:

the "unit" increment for scrolling in the specified direction

Throws:

IllegalArgumentException - for an invalid orientation

See Also:

JScrollBar.setUnitIncrement(int)

getScrollableBlockIncrement

int getScrollableBlockIncrement(Rectangle visibleRect,
                                int orientation,
                                int direction)

Components that display logical rows or columns should compute the scroll increment that will completely expose one block of rows or columns, depending on the value of orientation.

The default implementation of this is to simply return the visible area. Subclasses will likely be able to provide a much more reasonable value.

Parameters:

visibleRect - the view area visible within the viewport

orientation - either SwingConstants.VERTICAL or SwingConstants.HORIZONTAL

direction - less than zero to scroll up/left, greater than zero for down/right

Returns:

the "block" increment for scrolling in the specified direction

Throws:

IllegalArgumentException - for an invalid orientation

See Also:

JScrollBar.setBlockIncrement(int)

getScrollableTracksViewportWidth

boolean getScrollableTracksViewportWidth()

Returns true if a viewport should always force the width of this Scrollable to match the width of the viewport. For example a normal text view that supported line wrapping would return true here, since it would be undesirable for wrapped lines to disappear beyond the right edge of the viewport. Note that returning true for a Scrollable whose ancestor is a JScrollPane effectively disables horizontal scrolling.

Scrolling containers, like JViewport, will use this method each time they are validated.

Returns:

true if a viewport should force the Scrollables width to match its own

getScrollableTracksViewportHeight

boolean getScrollableTracksViewportHeight()

Returns true if a viewport should always force the height of this Scrollable to match the height of the viewport. For example a columnar text view that flowed text in left to right columns could effectively disable vertical scrolling by returning true here.

Scrolling containers, like JViewport, will use this method each time they are validated.

Returns:

true if a viewport should force the Scrollables height to match its own

getAccessibleContext

AccessibleContext getAccessibleContext()

Gets the AccessibleContext associated with this JTextComponent. For text components, the AccessibleContext takes the form of an AccessibleJTextComponent. A new AccessibleJTextComponent instance is created if necessary.

Returns:

an AccessibleJTextComponent that serves as the AccessibleContext of this JTextComponent