com.fr.design.gui.syntax.ui.rtextarea

类 RTextAreaUI

java.lang.Object

javax.swing.plaf.ComponentUI

javax.swing.plaf.TextUI

javax.swing.plaf.basic.BasicTextUI

javax.swing.plaf.basic.BasicTextAreaUI

com.fr.design.gui.syntax.ui.rtextarea.RTextAreaUI

所有已实现的接口:

javax.swing.text.ViewFactory

直接已知子类:

RSyntaxTextAreaUI

public class RTextAreaUI
extends javax.swing.plaf.basic.BasicTextAreaUI

The UI used by instances of RTextArea. This UI takes into account all of the "extras" involved in an RTextArea, including having a special caret (for insert and overwrite), background images, highlighting the current line, etc.

版本:

0.5

作者:

Robert Futrell

嵌套类概要

从类继承的嵌套类/接口 javax.swing.plaf.basic.BasicTextUI

javax.swing.plaf.basic.BasicTextUI.BasicCaret, javax.swing.plaf.basic.BasicTextUI.BasicHighlighter

字段概要

字段

限定符和类型	字段和说明
protected RTextArea	textArea

构造器概要

构造器

构造器和说明
RTextAreaUI(javax.swing.JComponent textArea) Constructor.

方法概要

方法

限定符和类型	方法和说明
javax.swing.text.View	create(javax.swing.text.Element elem) Creates the view for an element.
protected javax.swing.text.Caret	createCaret() Returns the default caret for an RTextArea.
protected javax.swing.text.Keymap	createKeymap() Creates the keymap for this text area.
protected javax.swing.ActionMap	createRTextAreaActionMap() Creates a default action map.
static javax.swing.plaf.ComponentUI	createUI(javax.swing.JComponent textArea) Creates a UI for an RTextArea.
protected java.lang.String	getActionMapName() Returns the name to use to cache/fetch the shared action map.
javax.swing.text.EditorKit	getEditorKit(javax.swing.text.JTextComponent tc) Fetches the EditorKit for the UI.
RTextArea	getRTextArea() Returns the text area for which we are the UI.
protected javax.swing.InputMap	getRTextAreaInputMap() Get the InputMap to use for the UI.
protected java.awt.Rectangle	getVisibleEditorRect() Gets the allocation to give the root View.
protected void	installDefaults()
protected void	installKeyboardActions()
void	installUI(javax.swing.JComponent c) Installs this UI to the given text component.
protected void	paintBackground(java.awt.Graphics g)
protected void	paintCurrentLineHighlight(java.awt.Graphics g, java.awt.Rectangle visibleRect) Paints the highlighted current line, if it is enabled.
protected void	paintLineHighlights(java.awt.Graphics g) Paints any line highlights.
protected void	paintMarginLine(java.awt.Graphics g, java.awt.Rectangle visibleRect) Draws the "margin line" if enabled.
int	yForLine(int line) Returns the y-coordinate of the specified line.
int	yForLineContaining(int offs) Returns the y-coordinate of the line containing an offset.

从类继承的方法 javax.swing.plaf.basic.BasicTextAreaUI

getBaseline, getBaselineResizeBehavior, getMinimumSize, getPreferredSize, getPropertyPrefix, propertyChange

从类继承的方法 javax.swing.plaf.basic.BasicTextUI

create, createHighlighter, damageRange, damageRange, getComponent, getKeymapName, getMaximumSize, getNextVisualPositionFrom, getRootView, getToolTipText, installListeners, modelChanged, modelToView, modelToView, paint, paintSafely, setView, uninstallDefaults, uninstallKeyboardActions, uninstallListeners, uninstallUI, update, viewToModel, viewToModel

从类继承的方法 javax.swing.plaf.ComponentUI

contains, getAccessibleChild, getAccessibleChildrenCount

从类继承的方法 java.lang.Object

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

字段详细资料

textArea

protected RTextArea textArea

构造器详细资料

RTextAreaUI

public RTextAreaUI(javax.swing.JComponent textArea)

Constructor.

参数:

textArea - An instance of RTextArea.

抛出:

java.lang.IllegalArgumentException - If textArea is not an instance of RTextArea.

方法详细资料

createUI

public static javax.swing.plaf.ComponentUI createUI(javax.swing.JComponent textArea)

Creates a UI for an RTextArea.

参数:

textArea - A text area.

返回:

The UI.

create

public javax.swing.text.View create(javax.swing.text.Element elem)

Creates the view for an element. Returns a WrappedPlainView or PlainView.

指定者:

create 在接口中 javax.swing.text.ViewFactory

覆盖:

create 在类中 javax.swing.plaf.basic.BasicTextAreaUI

参数:

elem - The element.

返回:

The view.

createCaret

protected javax.swing.text.Caret createCaret()

Returns the default caret for an RTextArea. This caret is capable of displaying itself differently for insert/overwrite modes.

覆盖:

createCaret 在类中 javax.swing.plaf.basic.BasicTextUI

返回:

The caret.

createKeymap

protected javax.swing.text.Keymap createKeymap()

Creates the keymap for this text area. This takes the super class's keymap, but sets the default keystroke to be RTextAreaEditorKit's DefaultKeyTypedAction. This must be done to override the default keymap's default key-typed action.

覆盖:

createKeymap 在类中 javax.swing.plaf.basic.BasicTextUI

返回:

The keymap.

createRTextAreaActionMap

protected javax.swing.ActionMap createRTextAreaActionMap()

Creates a default action map. This action map contains actions for all basic text area work - cut, copy, paste, select, caret motion, etc.

This isn't named createActionMap() because there is a package-private member by that name in BasicTextAreaUI, and some compilers will give warnings that we are not overriding that method since it is package-private.

返回:

The action map.

getActionMapName

protected java.lang.String getActionMapName()

Returns the name to use to cache/fetch the shared action map. This should be overridden by subclasses if the subclass has its own custom editor kit to install, so its actions get picked up.

返回:

The name of the cached action map.

getEditorKit

public javax.swing.text.EditorKit getEditorKit(javax.swing.text.JTextComponent tc)

Fetches the EditorKit for the UI.

覆盖:

getEditorKit 在类中 javax.swing.plaf.basic.BasicTextUI

参数:

tc - the text component for which this UI is installed

返回:

the editor capabilities

另请参阅:

TextUI.getEditorKit(javax.swing.text.JTextComponent)

getRTextArea

public RTextArea getRTextArea()

Returns the text area for which we are the UI.

返回:

The text area.

getRTextAreaInputMap

protected javax.swing.InputMap getRTextAreaInputMap()

Get the InputMap to use for the UI.

This method is not named getInputMap() because there is a package-private method in BasicTextAreaUI with that name. Thus, creating a new method with that name causes certain compilers to issue warnings that you are not actually overriding the original method (since it is package-private).

getVisibleEditorRect

protected java.awt.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.

覆盖:

getVisibleEditorRect 在类中 javax.swing.plaf.basic.BasicTextUI

返回:

the bounding box for the root view

installDefaults

protected void installDefaults()

覆盖:

installDefaults 在类中 javax.swing.plaf.basic.BasicTextAreaUI

installKeyboardActions

protected void installKeyboardActions()

覆盖:

installKeyboardActions 在类中 javax.swing.plaf.basic.BasicTextUI

installUI

public void installUI(javax.swing.JComponent c)

Installs this UI to the given text component.

覆盖:

installUI 在类中 javax.swing.plaf.basic.BasicTextUI

paintBackground

protected void paintBackground(java.awt.Graphics g)

覆盖:

paintBackground 在类中 javax.swing.plaf.basic.BasicTextUI

paintCurrentLineHighlight

protected void paintCurrentLineHighlight(java.awt.Graphics g,
                             java.awt.Rectangle visibleRect)

Paints the highlighted current line, if it is enabled.

参数:

g - The graphics context with which to paint.

visibleRect - The visible rectangle of the text area.

paintLineHighlights

protected void paintLineHighlights(java.awt.Graphics g)

Paints any line highlights.

参数:

g - The graphics context.

paintMarginLine

protected void paintMarginLine(java.awt.Graphics g,
                   java.awt.Rectangle visibleRect)

Draws the "margin line" if enabled.

参数:

g - The graphics context to paint with.

visibleRect - The visible rectangle of this text area.

yForLine

public int yForLine(int line)
             throws javax.swing.text.BadLocationException

Returns the y-coordinate of the specified line.

The default implementation is equivalent to:

 int startOffs = textArea.getLineStartOffset(line);
 return yForLineContaining(startOffs);
 

Subclasses that can calculate this value more quickly than traditional BasicTextUI.modelToView(JTextComponent, int) calls should override this method to do so. This method may be used when the entire bounding box isn't needed, to speed up rendering.

参数:

line - The line number.

返回:

The y-coordinate of the top of the line, or -1 if this text area doesn't yet have a positive size or the line is hidden (i.e. from folding).

抛出:

javax.swing.text.BadLocationException - If line isn't a valid line number for this document.

yForLineContaining

public int yForLineContaining(int offs)
                       throws javax.swing.text.BadLocationException

Returns the y-coordinate of the line containing an offset.

The default implementation is equivalent to:

 int line = textArea.getLineOfOffset(offs);
 int startOffs = textArea.getLineStartOffset(line);
 return modelToView(startOffs).y;
 

Subclasses that can calculate this value more quickly than traditional BasicTextUI.modelToView(JTextComponent, int) calls should override this method to do so. This method may be used when the entire bounding box isn't needed, to speed up rendering.

参数:

offs - The offset info the document.

返回:

The y-coordinate of the top of the offset, or -1 if this text area doesn't yet have a positive size or the line is hidden (i.e. from folding).

抛出:

javax.swing.text.BadLocationException - If offs isn't a valid offset into the document.