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FindDialog.java

@@ -0,0 +1,302 @@
+package p1;
+
+import java.io.*;
+import java.awt.*;
+import java.awt.event.*;
+import javax.swing.*;
+import javax.swing.border.*;
+
+class FindReplaceDemo extends JFrame {
+	FindDialog dialog = null;
+	JTextArea ta;
+	JButton findButton, replaceButton;
+
+	FindReplaceDemo() {
+		super("Find Demo");
+
+		ta = new JTextArea(7, 20);
+		findButton = new JButton("Find text");
+
+		ActionListener ac1 = new ActionListener() {
+			public void actionPerformed(ActionEvent ev) {
+				if (dialog == null)
+					dialog = new FindDialog(FindReplaceDemo.this.ta);
+				dialog.showDialog(FindReplaceDemo.this, true);// find
+
+			}
+		};
+		findButton.addActionListener(ac1);
+
+		replaceButton = new JButton("Replace text");
+
+		ActionListener ac2 = new ActionListener() {
+			public void actionPerformed(ActionEvent ev) {
+				if (dialog == null)
+					dialog = new FindDialog(FindReplaceDemo.this.ta);
+				dialog.showDialog(FindReplaceDemo.this, false);// find
+			}
+		};
+		replaceButton.addActionListener(ac2);
+
+		add(ta, BorderLayout.CENTER);
+		add(replaceButton, BorderLayout.NORTH);
+		add(findButton, BorderLayout.SOUTH);
+
+		setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
+		setBounds(50, 50, 400, 400);
+		ta.append("\n\n This is demo text by Saurabh Rathod");
+		ta.append("\n\n Mob no: 8888321187 ");
+		ta.setCaretPosition(0);
+		setVisible(true);
+	}
+
+	public static void main(String[] args) {
+		new FindReplaceDemo();
+	}
+
+}
+
+public class FindDialog extends JPanel implements ActionListener {
+	JTextArea jta;
+	public int lastIndex;
+	JLabel replaceLabel;
+
+	private TextField findWhat;
+	private JTextField replaceWith;
+
+	private JCheckBox matchCase;
+
+	JRadioButton up, down;
+
+	JButton findNextButton, replaceButton, replaceAllButton, cancelButton;
+
+	JPanel direction, buttonPanel, findButtonPanel, replaceButtonPanel;
+	CardLayout card;
+
+	private boolean ok;
+	private JDialog dialog;
+
+	public FindDialog(JTextArea jta) {
+
+		this.jta = jta;
+		findWhat = new TextField(20);
+		replaceWith = new JTextField(20);
+
+		matchCase = new JCheckBox("Match case");
+
+		up = new JRadioButton("Up");
+		down = new JRadioButton("Down");
+
+		down.setSelected(true);
+		ButtonGroup bg = new ButtonGroup();
+		bg.add(up);
+		bg.add(down);
+
+		direction = new JPanel();
+		Border etched = BorderFactory.createEtchedBorder();
+		Border titled = BorderFactory.createTitledBorder(etched, "Direction");
+		direction.setBorder(titled);
+		direction.setLayout(new GridLayout(1, 2));
+		direction.add(up);
+		direction.add(down);
+
+		JPanel southPanel = new JPanel();
+		southPanel.setLayout(new GridLayout(1, 2));
+		southPanel.add(matchCase);
+		southPanel.add(direction);
+
+		findNextButton = new JButton("Find Next");
+		replaceButton = new JButton("Replace");
+		replaceAllButton = new JButton("Replace All");
+		cancelButton = new JButton("Cancel");
+
+		replaceButtonPanel = new JPanel();
+		replaceButtonPanel.setLayout(new GridLayout(4, 1));
+		replaceButtonPanel.add(findNextButton);
+		replaceButtonPanel.add(replaceButton);
+		replaceButtonPanel.add(replaceAllButton);
+		replaceButtonPanel.add(cancelButton);
+
+		JPanel textPanel = new JPanel();
+		textPanel.setLayout(new GridLayout(3, 2));
+		textPanel.add(new JLabel("Find what "));
+		textPanel.add(findWhat);
+		textPanel.add(replaceLabel = new JLabel("Replace With "));
+		textPanel.add(replaceWith);
+		textPanel.add(new JLabel(" "));
+		textPanel.add(new JLabel(" "));
+
+		setLayout(new BorderLayout());
+
+		add(new JLabel("       "), BorderLayout.NORTH);
+		add(textPanel, BorderLayout.CENTER);
+		add(replaceButtonPanel, BorderLayout.EAST);
+		add(southPanel, BorderLayout.SOUTH);
+
+		setSize(200, 200);
+
+		findNextButton.addActionListener(this);
+		replaceButton.addActionListener(this);
+		replaceAllButton.addActionListener(this);
+
+		cancelButton.addActionListener(new ActionListener() {
+			public void actionPerformed(ActionEvent ev) {
+				dialog.setVisible(false);
+			}
+		});
+
+		findWhat.addFocusListener(new FocusAdapter() {
+			public void focusLost(FocusEvent te) {
+				enableDisableButtons();
+			}
+		});
+		findWhat.addTextListener(new TextListener() {
+			public void textValueChanged(TextEvent te) {
+				enableDisableButtons();
+			}
+		});
+
+	}
+
+	void enableDisableButtons() {
+		if (findWhat.getText().length() == 0) {
+			findNextButton.setEnabled(false);
+			replaceButton.setEnabled(false);
+			replaceAllButton.setEnabled(false);
+		} else {
+			findNextButton.setEnabled(true);
+			replaceButton.setEnabled(true);
+			replaceAllButton.setEnabled(true);
+		}
+	}
+
+	public void actionPerformed(ActionEvent ev) {
+
+		if (ev.getSource() == findNextButton)
+			findNextWithSelection();
+		else if (ev.getSource() == replaceButton)
+			replaceNext();
+		else if (ev.getSource() == replaceAllButton)
+			JOptionPane.showMessageDialog(null, "Total replacements made= " + replaceAllNext());
+
+	}
+
+	int findNext() {
+
+		String s1 = jta.getText();
+		String s2 = findWhat.getText();
+
+		lastIndex = jta.getCaretPosition();
+
+		int selStart = jta.getSelectionStart();
+		int selEnd = jta.getSelectionEnd();
+
+		if (up.isSelected()) {
+			if (selStart != selEnd)
+				lastIndex = selEnd - s2.length() - 1;
+
+			if (!matchCase.isSelected())
+				lastIndex = s1.toUpperCase().lastIndexOf(s2.toUpperCase(), lastIndex);
+			else
+				lastIndex = s1.lastIndexOf(s2, lastIndex);
+		} else {
+			if (selStart != selEnd)
+				lastIndex = selStart + 1;
+			if (!matchCase.isSelected())
+				lastIndex = s1.toUpperCase().indexOf(s2.toUpperCase(), lastIndex);
+			else
+				lastIndex = s1.indexOf(s2, lastIndex);
+		}
+
+		return lastIndex;
+	}
+
+	public void findNextWithSelection() {
+		int idx = findNext();
+		if (idx != -1) {
+			jta.setSelectionStart(idx);
+			jta.setSelectionEnd(idx + findWhat.getText().length());
+		} else
+			JOptionPane.showMessageDialog(this, "Cannot find" + " \"" + findWhat.getText() + "\"", "Find",
+					JOptionPane.INFORMATION_MESSAGE);
+	}
+
+	void replaceNext() {
+
+		if (jta.getSelectionStart() == jta.getSelectionEnd()) {
+			findNextWithSelection();
+			return;
+		}
+
+		String searchText = findWhat.getText();
+		String temp = jta.getSelectedText();
+
+		if ((matchCase.isSelected() && temp.equals(searchText))
+				|| (!matchCase.isSelected() && temp.equalsIgnoreCase(searchText)))
+			jta.replaceSelection(replaceWith.getText());
+
+		findNextWithSelection();
+	}
+
+	int replaceAllNext() {
+		if (up.isSelected())
+			jta.setCaretPosition(jta.getText().length() - 1);
+		else
+			jta.setCaretPosition(0);
+
+		int idx = 0;
+		int counter = 0;
+		do {
+			idx = findNext();
+			if (idx == -1)
+				break;
+			counter++;
+			jta.replaceRange(replaceWith.getText(), idx, idx + findWhat.getText().length());
+		} while (idx != -1);
+
+		return counter;
+	}
+
+	public boolean showDialog(Component parent, boolean isFind) {
+
+		Frame owner = null;
+		if (parent instanceof Frame)
+			owner = (Frame) parent;
+		else
+			owner = (Frame) SwingUtilities.getAncestorOfClass(Frame.class, parent);
+		if (dialog == null || dialog.getOwner() != owner) {
+			dialog = new JDialog(owner, false);
+			dialog.add(this);
+			dialog.getRootPane().setDefaultButton(findNextButton);
+		}
+
+		if (findWhat.getText().length() == 0)
+			findNextButton.setEnabled(false);
+		else
+			findNextButton.setEnabled(true);
+
+		replaceButton.setVisible(false);
+		replaceAllButton.setVisible(false);
+		replaceWith.setVisible(false);
+		replaceLabel.setVisible(false);
+
+		if (isFind) {
+
+			dialog.setSize(460, 180);
+			dialog.setTitle("Find");
+		} else {
+			replaceButton.setVisible(true);
+			replaceAllButton.setVisible(true);
+			replaceWith.setVisible(true);
+			replaceLabel.setVisible(true);
+
+			dialog.setSize(450, 200);
+			dialog.setTitle("Replace");
+		}
+
+		dialog.setVisible(true);
+
+		return ok;
+	}
+
+}