Example usage for javax.swing JTextArea getCaretPosition

Introduction

In this page you can find the example usage for javax.swing JTextArea getCaretPosition.

Prototype

@Transient
public int getCaretPosition() 

Source Link

Document

Returns the position of the text insertion caret for the text component.

Usage

From source file:Main.java

public static void main(String[] argv) throws Exception {
    JTextArea comp = new JTextArea();
    String actionName = "Lowercase";

    JFrame f = new JFrame();
    f.add(new JScrollPane(comp));
    f.setSize(300, 300);//from w ww . ja va2s  .co  m
    f.setVisible(true);
    comp.getInputMap().put(KeyStroke.getKeyStroke("F2"), actionName);

    comp.getActionMap().put(actionName, new TextAction(actionName) {
        public void actionPerformed(ActionEvent evt) {
            JTextComponent comp = getTextComponent(evt);

            if (comp.getSelectionStart() == comp.getSelectionEnd()) {
                if (comp.getCaretPosition() < comp.getDocument().getLength()) {
                    try {
                        int pos = comp.getCaretPosition();
                        Document doc = comp.getDocument();
                        String str = doc.getText(pos, 1).toLowerCase();

                        doc.remove(pos, 1);
                        doc.insertString(pos, str, null);
                        comp.moveCaretPosition(pos + 1);
                    } catch (Exception e) {
                        System.out.println();
                    }
                }
            } else {
                int s = comp.getSelectionStart();
                int e = comp.getSelectionEnd();

                comp.replaceSelection(comp.getSelectedText().toLowerCase());
                comp.select(s, e);
            }
        }
    });
}

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From source file:com.mindcognition.mindraider.ui.swing.concept.annotation.renderer.RichTextAnnotationRenderer.java

private void insertStringToAnnotation(String stringToInsert) {
    JTextArea editor = richTextAnnotationRenderer.editor;
    try {// w  w  w. jav  a 2s  . c o m
        final int caretPosition = editor.getCaretPosition();
        // link & htmlize
        String linked = editor.getDocument().getText(0, caretPosition) + stringToInsert
                + editor.getDocument().getText(caretPosition, editor.getDocument().getLength() - caretPosition);
        linked = linked.trim();
        // set to UI again
        editor.setText(linked);
        editor.setCaretPosition(caretPosition);
    } catch (Exception e) {
        e.printStackTrace();
    }
}

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From source file:com._17od.upm.gui.AccountDialog.java

/**
 * This method takes in a JTextArea object and then inserts the contents of
 * the system clipboard into that text area at the cursor position.
 * /*from  ww w .j av  a2  s  . com*/
 * @param textArea
 */
public void pasteToTextArea(JTextArea textArea) {
    String text = "";
    Clipboard clipboard = Toolkit.getDefaultToolkit().getSystemClipboard();
    Transferable clipText = clipboard.getContents(null);
    if ((clipText != null) && clipText.isDataFlavorSupported(DataFlavor.stringFlavor)) {
        try {
            text = (String) clipText.getTransferData(DataFlavor.stringFlavor);
        } catch (UnsupportedFlavorException ex) {
            ex.printStackTrace();
        } catch (IOException ex) {
            ex.printStackTrace();
        }
    }
    textArea.insert(text, textArea.getCaretPosition());
    textArea.requestFocus();
}

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From source file:DragFileDemo.java

public boolean importData(JComponent c, Transferable t) {
    JTextArea tc;

    if (!canImport(c, t.getTransferDataFlavors())) {
        return false;
    }//from w  ww.j a va  2s . c  o  m
    //A real application would load the file in another
    //thread in order to not block the UI. This step
    //was omitted here to simplify the code.
    try {
        if (hasFileFlavor(t.getTransferDataFlavors())) {
            String str = null;
            java.util.List files = (java.util.List) t.getTransferData(fileFlavor);
            for (int i = 0; i < files.size(); i++) {
                File file = (File) files.get(i);
                //Tell the tabbedpane controller to add
                //a new tab with the name of this file
                //on the tab. The text area that will
                //display the contents of the file is returned.
                tc = tpc.addTab(file.toString());

                BufferedReader in = null;

                try {
                    in = new BufferedReader(new FileReader(file));

                    while ((str = in.readLine()) != null) {
                        tc.append(str + newline);
                    }
                } catch (IOException ioe) {
                    System.out.println("importData: Unable to read from file " + file.toString());
                } finally {
                    if (in != null) {
                        try {
                            in.close();
                        } catch (IOException ioe) {
                            System.out.println("importData: Unable to close file " + file.toString());
                        }
                    }
                }
            }
            return true;
        } else if (hasStringFlavor(t.getTransferDataFlavors())) {
            tc = (JTextArea) c;
            if (tc.equals(source) && (tc.getCaretPosition() >= p0.getOffset())
                    && (tc.getCaretPosition() <= p1.getOffset())) {
                shouldRemove = false;
                return true;
            }
            String str = (String) t.getTransferData(stringFlavor);
            tc.replaceSelection(str);
            return true;
        }
    } catch (UnsupportedFlavorException ufe) {
        System.out.println("importData: unsupported data flavor");
    } catch (IOException ieo) {
        System.out.println("importData: I/O exception");
    }
    return false;
}

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