- java.lang.Object
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- javax.swing.plaf.ComponentUI
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- javax.swing.plaf.TextUI
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- javax.swing.plaf.basic.BasicTextUI
 
 
 
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- All Implemented Interfaces:
- ViewFactory
 - Direct Known Subclasses:
- BasicEditorPaneUI,- BasicTextAreaUI,- BasicTextFieldUI,- DefaultTextUI
 
 public abstract class BasicTextUI extends TextUI implements ViewFactory Basis of a text components look-and-feel. This provides the basic editor view and controller services that may be useful when creating a look-and-feel for an extension of JTextComponent.Most state is held in the associated JTextComponentas bound properties, and the UI installs default values for the various properties. This default will install something for all of the properties. Typically, a LAF implementation will do more however. At a minimum, a LAF would generally install key bindings.This class also provides some concurrency support if the Documentassociated with the JTextComponent is a subclass ofAbstractDocument. Access to the View (or View hierarchy) is serialized between any thread mutating the model and the Swing event thread (which is expected to render, do model/view coordinate translation, etc). Any access to the root view should first acquire a read-lock on the AbstractDocument and release that lock in a finally block.An important method to define is the getPropertyPrefix()method which is used as the basis of the keys used to fetch defaults from the UIManager. The string should reflect the type of TextUI (eg. TextField, TextArea, etc) without the particular LAF part of the name (eg Metal, Motif, etc).To build a view of the model, one of the following strategies can be employed. - 
 One strategy is to simply redefine the
 ViewFactory interface in the UI.  By default, this UI itself acts
 as the factory for View implementations.  This is useful
 for simple factories.  To do this reimplement the
 create(javax.swing.text.Element)method.
- A common strategy for creating more complex types of documents is to have the EditorKit implementation return a factory. Since the EditorKit ties all of the pieces necessary to maintain a type of document, the factory is typically an important part of that and should be produced by the EditorKit implementation.
 Warning: Serialized objects of this class will not be compatible with future Swing releases. The current serialization support is appropriate for short term storage or RMI between applications running the same version of Swing. As of 1.4, support for long term storage of all JavaBeans™ has been added to the java.beanspackage. Please seeXMLEncoder.
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Nested Class SummaryNested Classes Modifier and Type Class Description static classBasicTextUI.BasicCaretDefault implementation of the interfaceCaret.static classBasicTextUI.BasicHighlighterDefault implementation of the interfaceHighlighter.
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Constructor SummaryConstructors Constructor Description BasicTextUI()Creates a new UI.
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Method SummaryAll Methods Instance Methods Abstract Methods Concrete Methods Deprecated Methods Modifier and Type Method Description Viewcreate(Element elem)Creates a view for an element.Viewcreate(Element elem, int p0, int p1)Creates a view for an element.protected CaretcreateCaret()Creates the object to use for a caret.protected HighlightercreateHighlighter()Creates the object to use for adding highlights.protected KeymapcreateKeymap()Creates the keymap to use for the text component, and installs any necessary bindings into it.voiddamageRange(JTextComponent tc, int p0, int p1)Causes the portion of the view responsible for the given part of the model to be repainted.voiddamageRange(JTextComponent t, int p0, int p1, Position.Bias p0Bias, Position.Bias p1Bias)Causes the portion of the view responsible for the given part of the model to be repainted.protected JTextComponentgetComponent()Fetches the text component associated with this UI implementation.EditorKitgetEditorKit(JTextComponent tc)Fetches the EditorKit for the UI.protected StringgetKeymapName()Fetches the name of the keymap that will be installed/used by default for this UI.DimensiongetMaximumSize(JComponent c)Gets the maximum size for the editor component.DimensiongetMinimumSize(JComponent c)Gets the minimum size for the editor component.DimensiongetPreferredSize(JComponent c)Gets the preferred size for the editor component.protected abstract StringgetPropertyPrefix()Gets the name used as a key to look up properties through the UIManager.ViewgetRootView(JTextComponent tc)Fetches a View with the allocation of the associated text component (i.e. the root of the hierarchy) that can be traversed to determine how the model is being represented spatially.StringgetToolTipText(JTextComponent t, Point pt)Returns the string to be used as the tooltip at the passed in location.protected RectanglegetVisibleEditorRect()Gets the allocation to give the root View.protected voidinstallDefaults()Initializes component properties, such as font, foreground, background, caret color, selection color, selected text color, disabled text color, and border color.protected voidinstallKeyboardActions()Registers keyboard actions.protected voidinstallListeners()Installs listeners for the UI.voidinstallUI(JComponent c)Installs the UI for a component.protected voidmodelChanged()Flags model changes.RectanglemodelToView(JTextComponent tc, int pos)Deprecated.RectanglemodelToView(JTextComponent tc, int pos, Position.Bias bias)Deprecated.voidpaint(Graphics g, JComponent c)Paints the interface.protected voidpaintBackground(Graphics g)Paints a background for the view.protected voidpaintSafely(Graphics g)Paints the interface safely with a guarantee that the model won't change from the view of this thread.protected voidpropertyChange(PropertyChangeEvent evt)This method gets called when a bound property is changed on the associated JTextComponent.protected voidsetView(View v)Sets the current root of the view hierarchy and calls invalidate().protected voiduninstallDefaults()Sets the component properties that have not been explicitly overridden tonull.protected voiduninstallKeyboardActions()Unregisters keyboard actions.protected voiduninstallListeners()Uninstalls listeners for the UI.voiduninstallUI(JComponent c)Deinstalls the UI for a component.voidupdate(Graphics g, JComponent c)Superclass paints background in an uncontrollable way (i.e. one might want an image tiled into the background).intviewToModel(JTextComponent tc, Point pt)Deprecated.intviewToModel(JTextComponent tc, Point pt, Position.Bias[] biasReturn)Deprecated.- 
Methods declared in class javax.swing.plaf.TextUIgetNextVisualPositionFrom, getToolTipText2D, modelToView2D, viewToModel2D
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Methods declared in class javax.swing.plaf.ComponentUIcontains, createUI, getAccessibleChild, getAccessibleChildrenCount, getBaseline, getBaselineResizeBehavior
 
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Method Detail- 
createCaretprotected Caret createCaret() Creates the object to use for a caret. By default an instance of BasicCaret is created. This method can be redefined to provide something else that implements the InputPosition interface or a subclass of JCaret.- Returns:
- the caret object
 
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createHighlighterprotected Highlighter createHighlighter() Creates the object to use for adding highlights. By default an instance of BasicHighlighter is created. This method can be redefined to provide something else that implements the Highlighter interface or a subclass of DefaultHighlighter.- Returns:
- the highlighter
 
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getKeymapNameprotected String getKeymapName() Fetches the name of the keymap that will be installed/used by default for this UI. This is implemented to create a name based upon the classname. The name is the name of the class with the package prefix removed.- Returns:
- the name
 
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createKeymapprotected Keymap createKeymap() Creates the keymap to use for the text component, and installs any necessary bindings into it. By default, the keymap is shared between all instances of this type of TextUI. The keymap has the name defined by the getKeymapName method. If the keymap is not found, then DEFAULT_KEYMAP from JTextComponent is used.The set of bindings used to create the keymap is fetched from the UIManager using a key formed by combining the getPropertyPrefix()method and the string.keyBindings. The type is expected to beJTextComponent.KeyBinding[].- Returns:
- the keymap
- See Also:
- getKeymapName(),- JTextComponent
 
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propertyChangeprotected void propertyChange(PropertyChangeEvent evt) This method gets called when a bound property is changed on the associated JTextComponent. This is a hook which UI implementations may change to reflect how the UI displays bound properties of JTextComponent subclasses. This is implemented to do nothing (i.e. the response to properties in JTextComponent itself are handled prior to calling this method). This implementation updates the background of the text component if the editable and/or enabled state changes.- Parameters:
- evt- the property change event
 
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getPropertyPrefixprotected abstract String getPropertyPrefix() Gets the name used as a key to look up properties through the UIManager. This is used as a prefix to all the standard text properties.- Returns:
- the name
 
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installDefaultsprotected void installDefaults() Initializes component properties, such as font, foreground, background, caret color, selection color, selected text color, disabled text color, and border color. The font, foreground, and background properties are only set if their current value is either null or a UIResource, other properties are set if the current value is null.
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uninstallDefaultsprotected void uninstallDefaults() Sets the component properties that have not been explicitly overridden tonull. A property is considered overridden if its current value is not aUIResource.
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installListenersprotected void installListeners() Installs listeners for the UI.
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uninstallListenersprotected void uninstallListeners() Uninstalls listeners for the UI.
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installKeyboardActionsprotected void installKeyboardActions() Registers keyboard actions.
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uninstallKeyboardActionsprotected void uninstallKeyboardActions() Unregisters keyboard actions.
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paintBackgroundprotected void paintBackground(Graphics g) Paints a background for the view. This will only be called if isOpaque() on the associated component is true. The default is to paint the background color of the component.- Parameters:
- g- the graphics context
 
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getComponentprotected final JTextComponent getComponent() Fetches the text component associated with this UI implementation. This will be null until the ui has been installed.- Returns:
- the editor component
 
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modelChangedprotected void modelChanged() Flags model changes. This is called whenever the model has changed. It is implemented to rebuild the view hierarchy to represent the default root element of the associated model.
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setViewprotected final void setView(View v) Sets the current root of the view hierarchy and calls invalidate(). If there were any child components, they will be removed (i.e. there are assumed to have come from components embedded in views).- Parameters:
- v- the root view
 
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paintSafelyprotected void paintSafely(Graphics g) Paints the interface safely with a guarantee that the model won't change from the view of this thread. This does the following things, rendering from back to front.- If the component is marked as opaque, the background is painted in the current background color of the component.
- The highlights (if any) are painted.
- The view hierarchy is painted.
- The caret is painted.
 - Parameters:
- g- the graphics context
 
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installUIpublic void installUI(JComponent c) Installs the UI for a component. This does the following things.- Sets the associated component to opaque if the opaque property has not already been set by the client program. This will cause the component's background color to be painted.
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 Installs the default caret and highlighter into the
 associated component. These properties are only set if their
 current value is either nullor an instance ofUIResource.
- Attaches to the editor and model. If there is no model, a default one is created.
- Creates the view factory and the view hierarchy used to represent the model.
 - Overrides:
- installUIin class- ComponentUI
- Parameters:
- c- the editor component
- See Also:
- ComponentUI.installUI(javax.swing.JComponent)
 
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uninstallUIpublic void uninstallUI(JComponent c) Deinstalls the UI for a component. This removes the listeners, uninstalls the highlighter, removes views, and nulls out the keymap.- Overrides:
- uninstallUIin class- ComponentUI
- Parameters:
- c- the editor component
- See Also:
- ComponentUI.uninstallUI(javax.swing.JComponent)
 
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updatepublic void update(Graphics g, JComponent c) Superclass paints background in an uncontrollable way (i.e. one might want an image tiled into the background). To prevent this from happening twice, this method is reimplemented to simply paint.NOTE: Superclass is also not thread-safe in its rendering of the background, although that is not an issue with the default rendering. - Overrides:
- updatein class- ComponentUI
- Parameters:
- g- the- Graphicscontext in which to paint
- c- the component being painted; this argument is often ignored, but might be used if the UI object is stateless and shared by multiple components
- See Also:
- ComponentUI.paint(java.awt.Graphics, javax.swing.JComponent),- JComponent.paintComponent(java.awt.Graphics)
 
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paintpublic final void paint(Graphics g, JComponent c) Paints the interface. This is routed to the paintSafely method under the guarantee that the model won't change from the view of this thread while it's rendering (if the associated model is derived from AbstractDocument). This enables the model to potentially be updated asynchronously.- Overrides:
- paintin class- ComponentUI
- Parameters:
- g- the graphics context
- c- the editor component
- See Also:
- ComponentUI.update(java.awt.Graphics, javax.swing.JComponent)
 
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getPreferredSizepublic Dimension getPreferredSize(JComponent c) Gets the preferred size for the editor component. If the component has been given a size prior to receiving this request, it will set the size of the view hierarchy to reflect the size of the component before requesting the preferred size of the view hierarchy. This allows formatted views to format to the current component size before answering the request. Other views don't care about currently formatted size and give the same answer either way.- Overrides:
- getPreferredSizein class- ComponentUI
- Parameters:
- c- the editor component
- Returns:
- the size
- See Also:
- JComponent.getPreferredSize(),- LayoutManager.preferredLayoutSize(java.awt.Container)
 
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getMinimumSizepublic Dimension getMinimumSize(JComponent c) Gets the minimum size for the editor component.- Overrides:
- getMinimumSizein class- ComponentUI
- Parameters:
- c- the editor component
- Returns:
- the size
- See Also:
- JComponent.getMinimumSize(),- LayoutManager.minimumLayoutSize(java.awt.Container),- ComponentUI.getPreferredSize(javax.swing.JComponent)
 
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getMaximumSizepublic Dimension getMaximumSize(JComponent c) Gets the maximum size for the editor component.- Overrides:
- getMaximumSizein class- ComponentUI
- Parameters:
- c- the editor component
- Returns:
- the size
- See Also:
- JComponent.getMaximumSize(),- LayoutManager2.maximumLayoutSize(java.awt.Container)
 
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getVisibleEditorRectprotected Rectangle getVisibleEditorRect() Gets the allocation to give the root View. Due to an unfortunate set of historical events this method is inappropriately named. The Rectangle returned has nothing to do with visibility. The component must have a non-zero positive size for this translation to be computed.- Returns:
- the bounding box for the root view
 
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modelToView@Deprecated(since="9") public Rectangle modelToView(JTextComponent tc, int pos) throws BadLocationException Deprecated.Converts the given location in the model to a place in the view coordinate system. The component must have a non-zero positive size for this translation to be computed.- Specified by:
- modelToViewin class- TextUI
- Parameters:
- tc- the text component for which this UI is installed
- pos- the local location in the model to translate >= 0
- Returns:
- the coordinates as a rectangle, null if the model is not painted
- 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)
 
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modelToView@Deprecated(since="9") public Rectangle modelToView(JTextComponent tc, int pos, Position.Bias bias) throws BadLocationException Deprecated.Converts the given location in the model to a place in the view coordinate system. The component must have a non-zero positive size for this translation to be computed.- Specified by:
- modelToViewin class- TextUI
- Parameters:
- tc- the text component for which this UI is installed
- pos- the local location in the model to translate >= 0
- bias- the bias for the position
- Returns:
- the coordinates as a rectangle, null if the model is not painted
- 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)
 
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viewToModel@Deprecated(since="9") public int viewToModel(JTextComponent tc, Point pt) Deprecated.Converts the given place in the view coordinate system to the nearest representative location in the model. The component must have a non-zero positive size for this translation to be computed.- Specified by:
- viewToModelin class- TextUI
- Parameters:
- tc- the text component for which this UI is installed
- pt- the location in the view to translate. This should be in the same coordinate system as the mouse events.
- Returns:
- the offset from the start of the document >= 0, -1 if not painted
- See Also:
- TextUI.viewToModel(javax.swing.text.JTextComponent, java.awt.Point)
 
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viewToModel@Deprecated(since="9") public int viewToModel(JTextComponent tc, Point pt, Position.Bias[] biasReturn) Deprecated.Converts the given place in the view coordinate system to the nearest representative location in the model. The component must have a non-zero positive size for this translation to be computed.- Specified by:
- viewToModelin class- TextUI
- Parameters:
- tc- the text component for which this UI is installed
- pt- the location in the view to translate. This should be in the same coordinate system as the mouse events.
- biasReturn- filled in by this method to indicate whether the point given is closer to the previous or the next character in the model
- Returns:
- the offset from the start of the document >= 0, -1 if the component doesn't yet have a positive size.
- See Also:
- TextUI.viewToModel(javax.swing.text.JTextComponent, java.awt.Point)
 
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damageRangepublic void damageRange(JTextComponent tc, int p0, int p1) Causes the portion of the view responsible for the given part of the model to be repainted. Does nothing if the view is not currently painted.- Specified by:
- damageRangein class- TextUI
- Parameters:
- tc- the text component for which this UI is installed
- p0- the beginning of the range >= 0
- p1- the end of the range >= p0
- See Also:
- TextUI.damageRange(javax.swing.text.JTextComponent, int, int)
 
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damageRangepublic void damageRange(JTextComponent t, int p0, int p1, Position.Bias p0Bias, Position.Bias p1Bias) Causes the portion of the view responsible for the given part of the model to be repainted.- Specified by:
- damageRangein class- TextUI
- Parameters:
- p0- the beginning of the range >= 0
- p1- the end of the range >= p0
- t- the text component for which this UI is installed
- p0Bias- the bias of the first character position, toward the previous character or the next character
- p1Bias- the bias of the second character position, toward the previous character or the next character
 
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getEditorKitpublic EditorKit getEditorKit(JTextComponent tc) Fetches the EditorKit for the UI.- Specified by:
- getEditorKitin class- TextUI
- Parameters:
- tc- the text component for which this UI is installed
- Returns:
- the editor capabilities
- See Also:
- TextUI.getEditorKit(javax.swing.text.JTextComponent)
 
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getRootViewpublic View getRootView(JTextComponent tc) Fetches a View with the allocation of the associated text component (i.e. the root of the hierarchy) that can be traversed to determine how the model is being represented spatially.Warning: The View hierarchy can be traversed from the root view, and other things can be done as well. Things done in this way cannot be protected like simple method calls through the TextUI. Therefore, proper operation in the presence of concurrency must be arranged by any logic that calls this method! - Specified by:
- getRootViewin class- TextUI
- Parameters:
- tc- the text component for which this UI is installed
- Returns:
- the view
- See Also:
- TextUI.getRootView(javax.swing.text.JTextComponent)
 
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getToolTipTextpublic String getToolTipText(JTextComponent t, Point pt) Returns the string to be used as the tooltip at the passed in location. This forwards the method onto the root View.- Overrides:
- getToolTipTextin class- TextUI
- Parameters:
- t- the text component for which this UI is installed
- pt- a- Pointspecifying location for which to get a tooltip
- Returns:
- a Stringcontaining the tooltip
- Since:
- 1.4
- See Also:
- JTextComponent.getToolTipText(java.awt.event.MouseEvent),- View.getToolTipText(float, float, java.awt.Shape)
 
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createpublic View create(Element elem) Creates a view for an element. If a subclass wishes to directly implement the factory producing the view(s), it should reimplement this method. By default it simply returns null indicating it is unable to represent the element.- Specified by:
- createin interface- ViewFactory
- Parameters:
- elem- the element
- Returns:
- the view
- See Also:
- View
 
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createpublic View create(Element elem, int p0, int p1) Creates a view for an element. If a subclass wishes to directly implement the factory producing the view(s), it should reimplement this method. By default it simply returns null indicating it is unable to represent the part of the element.- Parameters:
- elem- the element
- p0- the starting offset >= 0
- p1- the ending offset >= p0
- Returns:
- the view
 
 
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