Examples of javax.swing.text.Caret

javax.swing.text.Caret
A place within a document view that represents where things can be inserted into the document model. A caret has a position in the document referred to as a dot. The dot is where the caret is currently located in the model. There is a second position maintained by the caret that represents the other end of a selection called mark. If there is no selection the dot and mark will be equal. If a selection exists, the two values will be different.
The dot can be placed by either calling setDot or moveDot. Setting the dot has the effect of removing any selection that may have previously existed. The dot and mark will be equal. Moving the dot has the effect of creating a selection as the mark is left at whatever position it previously had. @author Timothy Prinzing

        }
        return null;
      }


      private String getSelection(int pos, JEditorPane html) {
        Caret caret = html.getCaret();
        if (caret != null) {
          try {
            int start = Math.min(caret.getDot(), caret.getMark());
            int length = Math.abs(caret.getDot() - caret.getMark());
            return html.getDocument().getText(start, length);
          } catch (BadLocationException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
          }

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  // ensures that the selection is visible
  // because textcomponent doesn't show selection
  // when they don't have focus
  public void focusGained(FocusEvent e) {
    Caret caret = getTextComponent().getCaret();
    caret.setVisible(false);
    caret.setSelectionVisible(true);
  }

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        String chosedSmileyText = dlg.startDialog(x, y);
        if( chosedSmileyText != null && chosedSmileyText.length() > 0 ) {
            chosedSmileyText += " ";
            // paste into document
            try {
                final Caret caret = messageTextArea.getCaret();
                final int p0 = Math.min(caret.getDot(), caret.getMark());
                final int p1 = Math.max(caret.getDot(), caret.getMark());


                final Document document = messageTextArea.getDocument();
                
                // FIXME: maybe check for a blank before insert of smiley text???
                if (document instanceof PlainDocument) {

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        private void pasteText() {
            final Transferable clipboardContent = clipboard.getContents(this);
            try {
                final String text = (String) clipboardContent.getTransferData(DataFlavor.stringFlavor);


                final Caret caret = sourceTextComponent.getCaret();
                final int p0 = Math.min(caret.getDot(), caret.getMark());
                final int p1 = Math.max(caret.getDot(), caret.getMark());


                final Document document = sourceTextComponent.getDocument();


                if (document instanceof PlainDocument) {
                    ((PlainDocument) document).replace(p0, p1 - p0, text, null);

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  public static void setInsertMode(boolean insertM) {
    insertMode = insertM;
  }


  public void selectCaret(JTextPane2 pane2) {
    Caret newCaret = insertMode ? insertCaret : overwriteCaret;
    if (newCaret != pane2.getCaret()) {
      Caret caret = pane2.getCaret();
      int mark = caret.getMark();
      int dot = caret.getDot();
      caret.setVisible(false);
      pane2.setCaret(newCaret);
      newCaret.setDot(mark);
      newCaret.moveDot(dot);
      newCaret.setVisible(true);
    }

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        Component focusOwner = focusOwner();
        if (!(focusOwner instanceof JTextComponent)) {
          return null;
        }
        JTextComponent textComponent = (JTextComponent) focusOwner;
        Caret caret = textComponent.getCaret();
        if (caret == null || !caret.isVisible()) {
          return null;
        }
        caret.setVisible(false);
        return textComponent;
      }
    });
  }

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  @RunsInEDT
  private static void showCaretOf(final @Nonnull JTextComponent textComponent) {
    execute(new GuiTask() {
      @Override
      protected void executeInEDT() {
        Caret caret = textComponent.getCaret();
        if (caret != null) {
          caret.setVisible(true);
        }
      }
    });
  }

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        Highlighter highlighter = basicTextUI.createHighlighter();
        assertTrue(highlighter instanceof BasicTextUI.BasicHighlighter);
    }


    public void testCreateCaret() {
        Caret caret = basicTextUI.createCaret();
        assertTrue(caret instanceof BasicTextUI.BasicCaret);
    }

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        // regression for HARMONY-2521          
        new javax.swing.JTextPane().updateUI();            
    }


    public void testInstallUI() throws Exception {
        Caret caret = jta.getCaret();
        Highlighter highlighter = jta.getHighlighter();
        String prefix = ((BasicTextUI) tf.getUI()).getPropertyPrefix();
        (jta.getUI()).uninstallUI(jta);
        TextUI ui = jta.getUI();
        assertTrue(ui instanceof TextAreaUI);
        TextAreaUI.callOrder = "";
        (jta.getUI()).installUI(jta);
        String tmp = TextAreaUI.callOrder;
        tmp = findAndRemoveSubstring(tmp, "installUI::");
        tmp = findAndRemoveSubstring(tmp, "installDefaults::");
        tmp = findAndRemoveSubstring(tmp, "installKeyboardActions::");
        tmp = findAndRemoveSubstring(tmp, "installListeners::");
        tmp = findAndRemoveSubstring(tmp, "modelChanged::");
        tmp = findAndRemoveSubstring(tmp, "createCaret::");
        tmp = findAndRemoveSubstring(tmp, "createHighlighter::");
        tmp = tmp.replaceAll("create::", "");
        assertEquals("", tmp);
        assertNotSame(caret, jta.getCaret());
        assertTrue(jta.getCaret() instanceof UIResource);
        assertNotSame(highlighter, jta.getHighlighter());
        assertTrue(jta.getHighlighter() instanceof UIResource);
        assertTrue(jta.getTransferHandler() instanceof UIResource);
        assertTrue(jta.isOpaque());
        int caretBlinkRate = ((Integer) getProperty(prefix, "caretBlinkRate")).intValue();
        assertEquals(caretBlinkRate, caret.getBlinkRate());
        assertEquals(jta.getDocument().getDefaultRootElement(), jta.getUI().getRootView(jta)
                .getElement());
    }

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        c.setFont(font);
        c.setBackground(background);
        c.setForeground(foreground);
        c.setBorder(border);
        c.setMargin(margin);
        Caret caret = tf.getCaret();
        if (caret != null) {
            caret.setBlinkRate(caretBlinkRate);
        }
    }

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