如何获取 JTextArea 中的单词（或选择）在屏幕上的位置的点值？
How to get a point value for where a word (or selection) in a JTextArea is on the screen?
我的目标是在 JTextArea "actionable" 中创建 anyGivenWord。例如，当您将鼠标悬停在任何 GivenWord 上时，会出现一个工具提示，但当您将鼠标悬停在 JTextArea 中的任何其他单词上时则不会。据我所知，由于您不能直接执行此操作，我正在考虑在 JTextArea 中每个 anyGivenWord 出现的位置放置一个组件，并在 JTextArea 的大小发生变化时让它重新定位，以便单击看起来是 anyGivenWord 的内容实际上是在单击组件（导致触发某些侦听器）。为此，我需要知道该词出现在什么点 (x,y)，以便我可以将组件放置在该点。
我想我可以搜索 JTextArea 和 select anyGivenWord 的实例，然后是 getSelectionStart() 和 getSelectionEnd()，但我认为这些方法 return 的索引是first/last 字母 selected，例如，它在由 getText() 编辑的字符串 return 中的位置。我需要的是 x/y 坐标。这可能吗？
如果没有...有什么建议可以更优雅地完成我想做的事情吗？
您可以将 JEditorPane 与 HTML 一起使用，并向任何给定的单词添加超链接。阅读 Swing 教程中关于 How to Use Editor Panes 的部分，了解入门的基础知识。
然后您可以添加一个 HyperlinkListener 来响应单击单词时的事件。阅读 JEditorPane API 以获取使用 HyperlinkListener.
的示例
For example, when you hover the mouse over anyGivenWord, a tooltip appears,
如果您不想使用超链接，则可以通过覆盖 getToolTipText(...) 方法来控制工具提示文本。此方法接收 MouseEvent，因此您可以获得鼠标位置。然后，您可以使用 JTextArea 的 viewToModel(...) 方法来获取鼠标在 Document 中的偏移量。然后查看Utilities。 class 这将帮助您获得单词的 start/end 偏移量，以便您可以使用 getText(...) 方法在当前鼠标位置提取单词。
您可以使用任何 JTextComponent 并通过一些方法（在下面提供）可以从您的文本中收集几个不同的项目，例如：
- 当前鼠标指针位置下的角色；
- 当前鼠标指针位置下的Word；
- 位于当前鼠标指针位置下的选定文本
（如果选择）；
- 位于当前鼠标指针位置下的高亮文本
（如果您也喜欢在文本中突出显示）；
- 鼠标指针下的文字是否被选中？;
- 鼠标指针下的文字是否突出显示？
正如@camickr 已经如此慷慨地指出的那样，这里的关键是使用 JTextComponent.viewToModel() 方法（我相信所有 Swing Text 组件都包含这个方法）以获得与当前鼠标指针在组件内的位置相关的文本索引位置。
这里有一些可以玩的方法：
/**
* This method will return either boolean true or false if the text contained
* under the current mouse pointer location within a JTextComponent is Selected
* or not. If the text under the mouse is found to be Selected then boolean
* true is returned. If the text under the mouse pointer is NOT found to be
* Selected then boolean false is returned.<br><br>
*
* This method is not to be confused with the getHighlightedUnderMouse() method.
* Highlighted text and Selected text are two completely different things.
* Highlighted Text can be text which is Highlighted (generally with a specific
* color) and can be in many different locations throughout the entire document
* whereas Selected Text is generally done by dragging the mouse over a document
* location while holding the left mouse button making the text SELECTED.<br><br>
*
* This method is generally run within a JTextComponent MouseMove Event but can be
* run from any JTextComponent Mouse event which will provide the current mouse
* coordinates within the supplied JTextComponent Object.
*
* @param textComp (JTextComponent) The JTextComponent object to work on. This
* can be the component variable name for either a JTextField, JTextArea,
* JFormattedField, JPasswordField, JTextPane, and JEditorPane.<br>
*
* @param textAreaMouseXLocation (Integer) The current X Location of the mouse
* pointer. This value can be acquired from the JTextComponent's MouseMove event like
* this <code>int x = evt.getX();</code> where evt is the <b>java.awt.event.MouseEvent</b>
* parameter variable.<br>
*
* @param textAreaMouseYLocation (Integer) The current Y Location of the mouse
* pointer. This value can be acquired from the JTextComponent's MouseMove event like
* this <code>int y = evt.getY();</code> where evt is the <b>java.awt.event.MouseEvent</b>
* parameter variable.<br>
*
* @return (Boolean) True if the text under the current mouse pointer location
* within the supplied JTextComponent is Selected and false if it is not.
*/
public static boolean isSelectededUnderMouse(JTextComponent textComp, int textAreaMouseXLocation,
int textAreaMouseYLocation) {
boolean isSelected = false;
if (textComp.getText().isEmpty()) { return false; }
Point pt = new Point(textAreaMouseXLocation, textAreaMouseYLocation);
int pos = textComp.viewToModel(pt);
int start = textComp.getSelectionStart();
int end = textComp.getSelectionEnd();
if (pos >= start && pos <= end) {
isSelected = true;
}
return isSelected;
}
/**
* This method will return either boolean true or false if the text contained
* under the current mouse pointer location within a JTextComponent is Highlighted
* or not. If the text under the mouse is found to be Highlighted then boolean
* true is returned. If the text under the mouse pointer is not found to be
* highlighted then boolean false is returned.<br><br>
*
* This method is not to be confused with the getSelectedUnderMouse() method.
* Highlighted text and Selected text are two completely different things.
* Highlighted Text can be text which is Highlighted (generally with a specific
* color) and can be in many different locations throughout the entire document
* whereas Selected Text is generally done by dragging the mouse over a document
* location while holding the left mouse button making the text SELECTED.<br><br>
*
* This method is generally run within a JTextComponent's MouseMove Event but can be
* run from any JTextComponent's Mouse event which will provide the current mouse
* coordinates within the supplied JTextArea Object.
*
* @param textComp (JTextComponent) The JTextComponent object to work on. This
* can be the component variable name for either a JTextField, JTextArea,
* JFormattedField, JPasswordField, JTextPane, and JEditorPane.<br>
*
* @param textAreaMouseXLocation (Integer) The current X Location of the mouse
* pointer. This value can be acquired from the JTextComponent's MouseMove event like
* this <code>int x = evt.getX();</code> where evt is the <b>java.awt.event.MouseEvent</b>
* parameter variable.<br>
*
* @param textAreaMouseYLocation (Integer) The current Y Location of the mouse
* pointer. This value can be acquired from the JTextComponent's MouseMove event like
* this <code>int y = evt.getY();</code> where evt is the <b>java.awt.event.MouseEvent</b>
* parameter variable.<br>
*
* @return (Boolean) True if the text under the current mouse pointer location
* within the supplied JTextComponent is Highlighted and false if it is not.
*/
public static boolean isHighlightededUnderMouse(JTextComponent textComp, int textAreaMouseXLocation,
int textAreaMouseYLocation) {
boolean isHighlighted = false;
if (textComp.getText().isEmpty()) { return false; }
Point pt = new Point(textAreaMouseXLocation, textAreaMouseYLocation);
int pos = textComp.viewToModel(pt);
Highlighter.Highlight[] allHighlights = textComp.getHighlighter().getHighlights();
String strg = "";
for (int i = 0; i < allHighlights.length; i++) {
int start = (int)allHighlights[i].getStartOffset();
int end = (int)allHighlights[i].getEndOffset();
if (pos >= start && pos <= end) {
isHighlighted = true;
break;
}
}
return isHighlighted;
}
/**
* This method will return the "Selected" text contained under the mouse pointer
* location within a JTextComonent.<br><br>
*
* This method is not to be confused with the getHighlightedUnderMouse() method.
* Highlighted text and Selected text are two completely different things.
* Highlighted Text can be text which is Highlighted (generally with a specific
* color) and can be in many different locations throughout the entire document
* whereas Selected Text is generally done by dragging the mouse over a document
* location while holding the left mouse button making the text SELECTED.<br><br>
*
* This method is generally run within a Text Component's MouseMove Event but can be
* run from any Text Component's Mouse event which will provide the current mouse
* coordinates within the supplied Text Component Object.
*
* @param textComp (JTextComponent) The JTextComponent object to work on. This
* can be the component variable name for either a JTextField, JTextArea,
* JFormattedField, JPasswordField, JTextPane, and JEditorPane.<br>
*
* @param textAreaMouseXLocation (Integer) The current X Location of the mouse
* pointer. This value can be acquired from the Text Component's MouseMove event like
* this <code>int x = evt.getX();</code> where evt is the <b>java.awt.event.MouseEvent</b>
* parameter variable.<br>
*
* @param textAreaMouseYLocation (Integer) The current Y Location of the mouse
* pointer. This value can be acquired from the Text Component's MouseMove event like
* this <code>int y = evt.getY();</code> where evt is the <b>java.awt.event.MouseEvent</b>
* parameter variable.<br>
*
* @return (String) The current selected string located under the current mouse
* location.
*/
public static String getSelectededUnderMouse(JTextComponent textComp, int textAreaMouseXLocation,
int textAreaMouseYLocation) {
String selectedText = "";
if (textComp.getText().isEmpty()) { return selectedText; }
Point pt = new Point(textAreaMouseXLocation, textAreaMouseYLocation);
int pos = textComp.viewToModel(pt);
int start = textComp.getSelectionStart();
int end = textComp.getSelectionEnd();
int selectedLength = (end - start);
if (pos >= start && pos <= end) {
try {
selectedText = textComp.getText(start, selectedLength);
}
catch (BadLocationException ex) {
// Ignore!!!
}
}
return selectedText;
}
/**
* This method will return the "Highlighted" text contained under the mouse pointer
* location within a JTextComponent.<br><br>
*
* This method is not to be confused with the getSelectedUnderMouse() method.
* Highlighted text and Selected text are two completely different things.
* Highlighted Text can be text which is Highlighted (generally with a specific
* color) and can be in many different locations throughout the entire document
* whereas Selected Text is generally done by dragging the mouse over a document
* location while holding the left mouse button making the text SELECTED.<br><br>
*
* This method is generally run within a JTextComponent MouseMove Event but can be
* run from any JTextComponent Mouse event which will provide the current mouse
* coordinates within the supplied JTextComponent Object.
*
* @param textComp (JTextComponent) The JTextComponent object to work on. This
* can be the component variable name for either a JTextField, JTextArea,
* JFormattedField, JPasswordField, JTextPane, and JEditorPane.<br>
*
* @param textAreaMouseXLocation (Integer) The current X Location of the mouse
* pointer. This value can be acquired from the JTextComponent's MouseMove event like
* this <code>int x = evt.getX();</code> where evt is the <b>java.awt.event.MouseEvent</b>
* parameter variable.<br>
*
* @param textAreaMouseYLocation (Integer) The current Y Location of the mouse
* pointer. This value can be acquired from the JTextComponent's MouseMove event like
* this <code>int y = evt.getY();</code> where evt is the <b>java.awt.event.MouseEvent</b>
* parameter variable.<br>
*
* @return (String) The current highlighted string located under the current mouse
* location.
*/
public static String getHighlightededUnderMouse(JTextComponent textComp, int textAreaMouseXLocation,
int textAreaMouseYLocation) {
if (textComp.getText().isEmpty()) { return ""; }
Point pnt = new Point(textAreaMouseXLocation, textAreaMouseYLocation);
int pos = textComp.viewToModel(pnt);
String highlightedText = "";
Highlighter.Highlight[] allHighlights = textComp.getHighlighter().getHighlights();
if (allHighlights.length > 0) {
for (int i = 0; i < allHighlights.length; i++) {
int start = (int)allHighlights[i].getStartOffset();
int end = (int)allHighlights[i].getEndOffset();
int hlStringLength = (end-start);
if (pos >= start && pos <= end) {
try {
highlightedText = textComp.getText(start, hlStringLength);
break;
}
catch (BadLocationException ex) {
// Ignore!!!
}
}
}
}
return highlightedText;
}
/**
* This method would normally be called within a JTextComponent's MouseMove Event.
*
* @param textComp (JTextComponent) The JTextComponent object to work on. This
* can be the component variable name for either a JTextField, JTextArea,
* JFormattedField, JPasswordField, JTextPane, and JEditorPane.<br>
*
* @param textAreaMouseXLocation (Integer) The current X Location of the mouse
* pointer. This value can be acquired from the JTextComponent's MouseMove event like
* this <code>int x = evt.getX();</code> where evt is the <b>java.awt.event.MouseEvent</b>
* parameter variable.<br>
*
* @param textAreaMouseYLocation (Integer) The current Y Location of the mouse
* pointer. This value can be acquired from the JTextComponent's MouseMove event like
* this <code>int y = evt.getY();</code> where evt is the <b>java.awt.event.MouseEvent</b>
* parameter variable.<br>
*
* @return (String) The current character located under the current mouse
* location.
*/
public static String getCharUnderMouse(JTextComponent textComp, int textAreaMouseXLocation,
int textAreaMouseYLocation) {
String character = "";
Point pt = new Point(textAreaMouseXLocation, textAreaMouseYLocation);
int pos = textComp.viewToModel(pt);
try {
character = textComp.getDocument().getText(pos, 1);
}
catch (BadLocationException ex) {
// Ignore!!
}
return character;
}
/**
* This method would normally be called within a JTextComponent's MouseMove Event.
*
* @param textComp (JTextArea) The JTextComponent object to work on. This
* can be the component variable name for either a JTextField, JTextArea,
* JFormattedField, JPasswordField, JTextPane, and JEditorPane.<br>
*
* @param textAreaMouseXLocation (Integer) The current X Location of the mouse
* pointer. This value can be acquired from the JTextComponent's MouseMove event like
* this <code>int x = evt.getX();</code> where evt is the <b>java.awt.event.MouseEvent</b>
* parameter variable.<br>
*
* @param textAreaMouseYLocation (Integer) The current Y Location of the mouse
* pointer. This value can be acquired from the JTextComponent's MouseMove event like
* this <code>int y = evt.getY();<code> where evt is the <b>java.awt.event.MouseEvent</b>
* parameter variable.<br>
*
* @return (String) The current Word located under the current mouse location.
*/
public static String getWordUnderMouse(JTextComponent textComp, int textAreaMouseXLocation,
int textAreaMouseYLocation) {
Point pt = new Point(textAreaMouseXLocation, textAreaMouseYLocation);
int pos = textComp.viewToModel(pt);
String word = "";
try {
Document doc = textComp.getDocument();
if( pos > 0 && (pos >= doc.getLength() || Character.isWhitespace( doc.getText( pos, 1 ).charAt( 0 ) )) ) {
// if the next character is a white space then use
// the word on the left side..
pos--;
}
// get the word from current position
final int begOffs = Utilities.getWordStart(textComp, pos);
final int endOffs = Utilities.getWordEnd(textComp, pos);
word = textComp.getText( begOffs, endOffs - begOffs );
}
catch( BadLocationException ex ) {
// Ignore this exception!!!
}
return word;
}
我的目标是在 JTextArea "actionable" 中创建 anyGivenWord。例如，当您将鼠标悬停在任何 GivenWord 上时，会出现一个工具提示，但当您将鼠标悬停在 JTextArea 中的任何其他单词上时则不会。据我所知，由于您不能直接执行此操作，我正在考虑在 JTextArea 中每个 anyGivenWord 出现的位置放置一个组件，并在 JTextArea 的大小发生变化时让它重新定位，以便单击看起来是 anyGivenWord 的内容实际上是在单击组件（导致触发某些侦听器）。为此，我需要知道该词出现在什么点 (x,y)，以便我可以将组件放置在该点。
我想我可以搜索 JTextArea 和 select anyGivenWord 的实例，然后是 getSelectionStart() 和 getSelectionEnd()，但我认为这些方法 return 的索引是first/last 字母 selected，例如，它在由 getText() 编辑的字符串 return 中的位置。我需要的是 x/y 坐标。这可能吗？
如果没有...有什么建议可以更优雅地完成我想做的事情吗？
您可以将 JEditorPane 与 HTML 一起使用，并向任何给定的单词添加超链接。阅读 Swing 教程中关于 How to Use Editor Panes 的部分，了解入门的基础知识。
然后您可以添加一个 HyperlinkListener 来响应单击单词时的事件。阅读 JEditorPane API 以获取使用 HyperlinkListener.
For example, when you hover the mouse over anyGivenWord, a tooltip appears,
如果您不想使用超链接，则可以通过覆盖 getToolTipText(...) 方法来控制工具提示文本。此方法接收 MouseEvent，因此您可以获得鼠标位置。然后，您可以使用 JTextArea 的 viewToModel(...) 方法来获取鼠标在 Document 中的偏移量。然后查看Utilities。 class 这将帮助您获得单词的 start/end 偏移量，以便您可以使用 getText(...) 方法在当前鼠标位置提取单词。
您可以使用任何 JTextComponent 并通过一些方法（在下面提供）可以从您的文本中收集几个不同的项目，例如：
- 当前鼠标指针位置下的角色；
- 当前鼠标指针位置下的Word；
- 位于当前鼠标指针位置下的选定文本 （如果选择）；
- 位于当前鼠标指针位置下的高亮文本 （如果您也喜欢在文本中突出显示）；
- 鼠标指针下的文字是否被选中？;
- 鼠标指针下的文字是否突出显示？
正如@camickr 已经如此慷慨地指出的那样，这里的关键是使用 JTextComponent.viewToModel() 方法（我相信所有 Swing Text 组件都包含这个方法）以获得与当前鼠标指针在组件内的位置相关的文本索引位置。
这里有一些可以玩的方法：
/**
* This method will return either boolean true or false if the text contained
* under the current mouse pointer location within a JTextComponent is Selected
* or not. If the text under the mouse is found to be Selected then boolean
* true is returned. If the text under the mouse pointer is NOT found to be
* Selected then boolean false is returned.<br><br>
*
* This method is not to be confused with the getHighlightedUnderMouse() method.
* Highlighted text and Selected text are two completely different things.
* Highlighted Text can be text which is Highlighted (generally with a specific
* color) and can be in many different locations throughout the entire document
* whereas Selected Text is generally done by dragging the mouse over a document
* location while holding the left mouse button making the text SELECTED.<br><br>
*
* This method is generally run within a JTextComponent MouseMove Event but can be
* run from any JTextComponent Mouse event which will provide the current mouse
* coordinates within the supplied JTextComponent Object.
*
* @param textComp (JTextComponent) The JTextComponent object to work on. This
* can be the component variable name for either a JTextField, JTextArea,
* JFormattedField, JPasswordField, JTextPane, and JEditorPane.<br>
*
* @param textAreaMouseXLocation (Integer) The current X Location of the mouse
* pointer. This value can be acquired from the JTextComponent's MouseMove event like
* this <code>int x = evt.getX();</code> where evt is the <b>java.awt.event.MouseEvent</b>
* parameter variable.<br>
*
* @param textAreaMouseYLocation (Integer) The current Y Location of the mouse
* pointer. This value can be acquired from the JTextComponent's MouseMove event like
* this <code>int y = evt.getY();</code> where evt is the <b>java.awt.event.MouseEvent</b>
* parameter variable.<br>
*
* @return (Boolean) True if the text under the current mouse pointer location
* within the supplied JTextComponent is Selected and false if it is not.
*/
public static boolean isSelectededUnderMouse(JTextComponent textComp, int textAreaMouseXLocation,
int textAreaMouseYLocation) {
boolean isSelected = false;
if (textComp.getText().isEmpty()) { return false; }
Point pt = new Point(textAreaMouseXLocation, textAreaMouseYLocation);
int pos = textComp.viewToModel(pt);
int start = textComp.getSelectionStart();
int end = textComp.getSelectionEnd();
if (pos >= start && pos <= end) {
isSelected = true;
}
return isSelected;
}
/**
* This method will return either boolean true or false if the text contained
* under the current mouse pointer location within a JTextComponent is Highlighted
* or not. If the text under the mouse is found to be Highlighted then boolean
* true is returned. If the text under the mouse pointer is not found to be
* highlighted then boolean false is returned.<br><br>
*
* This method is not to be confused with the getSelectedUnderMouse() method.
* Highlighted text and Selected text are two completely different things.
* Highlighted Text can be text which is Highlighted (generally with a specific
* color) and can be in many different locations throughout the entire document
* whereas Selected Text is generally done by dragging the mouse over a document
* location while holding the left mouse button making the text SELECTED.<br><br>
*
* This method is generally run within a JTextComponent's MouseMove Event but can be
* run from any JTextComponent's Mouse event which will provide the current mouse
* coordinates within the supplied JTextArea Object.
*
* @param textComp (JTextComponent) The JTextComponent object to work on. This
* can be the component variable name for either a JTextField, JTextArea,
* JFormattedField, JPasswordField, JTextPane, and JEditorPane.<br>
*
* @param textAreaMouseXLocation (Integer) The current X Location of the mouse
* pointer. This value can be acquired from the JTextComponent's MouseMove event like
* this <code>int x = evt.getX();</code> where evt is the <b>java.awt.event.MouseEvent</b>
* parameter variable.<br>
*
* @param textAreaMouseYLocation (Integer) The current Y Location of the mouse
* pointer. This value can be acquired from the JTextComponent's MouseMove event like
* this <code>int y = evt.getY();</code> where evt is the <b>java.awt.event.MouseEvent</b>
* parameter variable.<br>
*
* @return (Boolean) True if the text under the current mouse pointer location
* within the supplied JTextComponent is Highlighted and false if it is not.
*/
public static boolean isHighlightededUnderMouse(JTextComponent textComp, int textAreaMouseXLocation,
int textAreaMouseYLocation) {
boolean isHighlighted = false;
if (textComp.getText().isEmpty()) { return false; }
Point pt = new Point(textAreaMouseXLocation, textAreaMouseYLocation);
int pos = textComp.viewToModel(pt);
Highlighter.Highlight[] allHighlights = textComp.getHighlighter().getHighlights();
String strg = "";
for (int i = 0; i < allHighlights.length; i++) {
int start = (int)allHighlights[i].getStartOffset();
int end = (int)allHighlights[i].getEndOffset();
if (pos >= start && pos <= end) {
isHighlighted = true;
break;
}
}
return isHighlighted;
}
/**
* This method will return the "Selected" text contained under the mouse pointer
* location within a JTextComonent.<br><br>
*
* This method is not to be confused with the getHighlightedUnderMouse() method.
* Highlighted text and Selected text are two completely different things.
* Highlighted Text can be text which is Highlighted (generally with a specific
* color) and can be in many different locations throughout the entire document
* whereas Selected Text is generally done by dragging the mouse over a document
* location while holding the left mouse button making the text SELECTED.<br><br>
*
* This method is generally run within a Text Component's MouseMove Event but can be
* run from any Text Component's Mouse event which will provide the current mouse
* coordinates within the supplied Text Component Object.
*
* @param textComp (JTextComponent) The JTextComponent object to work on. This
* can be the component variable name for either a JTextField, JTextArea,
* JFormattedField, JPasswordField, JTextPane, and JEditorPane.<br>
*
* @param textAreaMouseXLocation (Integer) The current X Location of the mouse
* pointer. This value can be acquired from the Text Component's MouseMove event like
* this <code>int x = evt.getX();</code> where evt is the <b>java.awt.event.MouseEvent</b>
* parameter variable.<br>
*
* @param textAreaMouseYLocation (Integer) The current Y Location of the mouse
* pointer. This value can be acquired from the Text Component's MouseMove event like
* this <code>int y = evt.getY();</code> where evt is the <b>java.awt.event.MouseEvent</b>
* parameter variable.<br>
*
* @return (String) The current selected string located under the current mouse
* location.
*/
public static String getSelectededUnderMouse(JTextComponent textComp, int textAreaMouseXLocation,
int textAreaMouseYLocation) {
String selectedText = "";
if (textComp.getText().isEmpty()) { return selectedText; }
Point pt = new Point(textAreaMouseXLocation, textAreaMouseYLocation);
int pos = textComp.viewToModel(pt);
int start = textComp.getSelectionStart();
int end = textComp.getSelectionEnd();
int selectedLength = (end - start);
if (pos >= start && pos <= end) {
try {
selectedText = textComp.getText(start, selectedLength);
}
catch (BadLocationException ex) {
// Ignore!!!
}
}
return selectedText;
}
/**
* This method will return the "Highlighted" text contained under the mouse pointer
* location within a JTextComponent.<br><br>
*
* This method is not to be confused with the getSelectedUnderMouse() method.
* Highlighted text and Selected text are two completely different things.
* Highlighted Text can be text which is Highlighted (generally with a specific
* color) and can be in many different locations throughout the entire document
* whereas Selected Text is generally done by dragging the mouse over a document
* location while holding the left mouse button making the text SELECTED.<br><br>
*
* This method is generally run within a JTextComponent MouseMove Event but can be
* run from any JTextComponent Mouse event which will provide the current mouse
* coordinates within the supplied JTextComponent Object.
*
* @param textComp (JTextComponent) The JTextComponent object to work on. This
* can be the component variable name for either a JTextField, JTextArea,
* JFormattedField, JPasswordField, JTextPane, and JEditorPane.<br>
*
* @param textAreaMouseXLocation (Integer) The current X Location of the mouse
* pointer. This value can be acquired from the JTextComponent's MouseMove event like
* this <code>int x = evt.getX();</code> where evt is the <b>java.awt.event.MouseEvent</b>
* parameter variable.<br>
*
* @param textAreaMouseYLocation (Integer) The current Y Location of the mouse
* pointer. This value can be acquired from the JTextComponent's MouseMove event like
* this <code>int y = evt.getY();</code> where evt is the <b>java.awt.event.MouseEvent</b>
* parameter variable.<br>
*
* @return (String) The current highlighted string located under the current mouse
* location.
*/
public static String getHighlightededUnderMouse(JTextComponent textComp, int textAreaMouseXLocation,
int textAreaMouseYLocation) {
if (textComp.getText().isEmpty()) { return ""; }
Point pnt = new Point(textAreaMouseXLocation, textAreaMouseYLocation);
int pos = textComp.viewToModel(pnt);
String highlightedText = "";
Highlighter.Highlight[] allHighlights = textComp.getHighlighter().getHighlights();
if (allHighlights.length > 0) {
for (int i = 0; i < allHighlights.length; i++) {
int start = (int)allHighlights[i].getStartOffset();
int end = (int)allHighlights[i].getEndOffset();
int hlStringLength = (end-start);
if (pos >= start && pos <= end) {
try {
highlightedText = textComp.getText(start, hlStringLength);
break;
}
catch (BadLocationException ex) {
// Ignore!!!
}
}
}
}
return highlightedText;
}
/**
* This method would normally be called within a JTextComponent's MouseMove Event.
*
* @param textComp (JTextComponent) The JTextComponent object to work on. This
* can be the component variable name for either a JTextField, JTextArea,
* JFormattedField, JPasswordField, JTextPane, and JEditorPane.<br>
*
* @param textAreaMouseXLocation (Integer) The current X Location of the mouse
* pointer. This value can be acquired from the JTextComponent's MouseMove event like
* this <code>int x = evt.getX();</code> where evt is the <b>java.awt.event.MouseEvent</b>
* parameter variable.<br>
*
* @param textAreaMouseYLocation (Integer) The current Y Location of the mouse
* pointer. This value can be acquired from the JTextComponent's MouseMove event like
* this <code>int y = evt.getY();</code> where evt is the <b>java.awt.event.MouseEvent</b>
* parameter variable.<br>
*
* @return (String) The current character located under the current mouse
* location.
*/
public static String getCharUnderMouse(JTextComponent textComp, int textAreaMouseXLocation,
int textAreaMouseYLocation) {
String character = "";
Point pt = new Point(textAreaMouseXLocation, textAreaMouseYLocation);
int pos = textComp.viewToModel(pt);
try {
character = textComp.getDocument().getText(pos, 1);
}
catch (BadLocationException ex) {
// Ignore!!
}
return character;
}
/**
* This method would normally be called within a JTextComponent's MouseMove Event.
*
* @param textComp (JTextArea) The JTextComponent object to work on. This
* can be the component variable name for either a JTextField, JTextArea,
* JFormattedField, JPasswordField, JTextPane, and JEditorPane.<br>
*
* @param textAreaMouseXLocation (Integer) The current X Location of the mouse
* pointer. This value can be acquired from the JTextComponent's MouseMove event like
* this <code>int x = evt.getX();</code> where evt is the <b>java.awt.event.MouseEvent</b>
* parameter variable.<br>
*
* @param textAreaMouseYLocation (Integer) The current Y Location of the mouse
* pointer. This value can be acquired from the JTextComponent's MouseMove event like
* this <code>int y = evt.getY();<code> where evt is the <b>java.awt.event.MouseEvent</b>
* parameter variable.<br>
*
* @return (String) The current Word located under the current mouse location.
*/
public static String getWordUnderMouse(JTextComponent textComp, int textAreaMouseXLocation,
int textAreaMouseYLocation) {
Point pt = new Point(textAreaMouseXLocation, textAreaMouseYLocation);
int pos = textComp.viewToModel(pt);
String word = "";
try {
Document doc = textComp.getDocument();
if( pos > 0 && (pos >= doc.getLength() || Character.isWhitespace( doc.getText( pos, 1 ).charAt( 0 ) )) ) {
// if the next character is a white space then use
// the word on the left side..
pos--;
}
// get the word from current position
final int begOffs = Utilities.getWordStart(textComp, pos);
final int endOffs = Utilities.getWordEnd(textComp, pos);
word = textComp.getText( begOffs, endOffs - begOffs );
}
catch( BadLocationException ex ) {
// Ignore this exception!!!
}
return word;
}