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鼠标在TEXTAREA中的位置
来源: 互联网 发布时间：2015-01-31
本文导语: applet中 鼠标在TEXTAREA中点击 要知道鼠标在第 几行，第几列 | 刚好看到个例子，copy给你吧. CaretListenerLabel caretListenerLabel = new CaretListenerLabel("Caret Status"); ... text.addActionListener(caretListenerLabel); .....
applet中
鼠标在TEXTAREA中点击
要知道鼠标在第 几行，第几列
鼠标在TEXTAREA中点击
要知道鼠标在第 几行，第几列
|
刚好看到个例子，copy给你吧.
CaretListenerLabel caretListenerLabel =
new CaretListenerLabel("Caret Status");
...
text.addActionListener(caretListenerLabel);
...
protected class CaretListenerLabel extends JLabel
implements CaretListener
{
...
public void caretUpdate(CaretEvent e) {
//Get the location in the text
int dot = e.getDot();
int mark = e.getMark();
...
}
}
-----------------------
The CaretEvent class defines two useful methods:
int getDot()
Returns the current location of the caret. If text is selected, the caret marks one end of the selection.
int getMark()
Returns the other end of the selection. If nothing is selected, the value returned by this method is equal to the value returned by getDot. Note that the dot is not guaranteed to be less than the mark.
CaretListenerLabel caretListenerLabel =
new CaretListenerLabel("Caret Status");
...
text.addActionListener(caretListenerLabel);
...
protected class CaretListenerLabel extends JLabel
implements CaretListener
{
...
public void caretUpdate(CaretEvent e) {
//Get the location in the text
int dot = e.getDot();
int mark = e.getMark();
...
}
}
-----------------------
The CaretEvent class defines two useful methods:
int getDot()
Returns the current location of the caret. If text is selected, the caret marks one end of the selection.
int getMark()
Returns the other end of the selection. If nothing is selected, the value returned by this method is equal to the value returned by getDot. Note that the dot is not guaranteed to be less than the mark.
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