minieditor.java

Java编写的记事本程序,对学习Java桌面编程的朋友可能会有帮助!

			dsMatchCase = new Checkbox("Match Case");
			ds.getContentPane().add(dsLoop);
			ds.getContentPane().add(dsMatchCase);
			ds.getContentPane().add(dsMessage1);
			ds.getContentPane().add(dsMessage2);
			ds.setLocation(120, 120);
			ds.addWindowListener(new WindowAdapter() {
				public void windowClosing(WindowEvent e) {
					dispose();
					FindStartPos = 0;
				}
			});
			ds.setSize(250, 110);
			ds.setVisible(true);
		} else if (ae.getSource() == bs) {
			int a = 0, b = 0;
			String str1, str2, str3, str4, strA, strB;
			str1 = ta.getText();
			str2 = str1.toLowerCase();
			str3 = tfs.getText();
			str4 = str3.toLowerCase();
			if (dsMatchCase.getState()) {
				strA = str1;
				strB = str3;
			} else {
				strA = str2;
				strB = str4;
			}
			a = strA.indexOf(strB, FindStartPos);
			if (a > -1) {
				ta.setCaretPosition(a);
				b = tfs.getText().length();
				ta.select(a, a + b);
				FindStartPos = a + b;
				foundCount++;
				dsMessage2.setText(foundCount + "");
			} else {
				if (dsLoop.getState()) {
					JOptionPane.showMessageDialog(null, "End of file.",
							"Find result", 1);
					FindStartPos = 0;
				} else {
					JOptionPane.showMessageDialog(null, "End of file.",
							"Find result", 1);
				}
				foundCount = 0;
			}
		} else if (ae.getSource() == menuEditReplace) {
			JDialog dr = new JDialog(this, "Replace", true);
			dr.getContentPane().setLayout(new GridBagLayout());
			GridBagConstraints gbc = new GridBagConstraints();
			gbc.gridx = 0;
			gbc.gridy = 0;
			gbc.gridwidth = 2;
			gbc.gridheight = 1;
			// gbc.fill = gbc.HORIZONTAL; gbc.anchor = gbc.CENTER;
			Panel p1 = new Panel();
			dr.getContentPane().add(p1);
			// drMatchCase = new Checkbox("Match Case");
			// gbc.gridx = 1;
			// gbc.gridy = 1;
			// gbc.gridwidth = 1;
			// gbc.gridheight =1;
			// dr.getContentPane().add(drMatchCase);
			gbc.gridx = 2;
			gbc.gridy = 0;
			gbc.gridwidth = 1;
			gbc.gridheight = 1;
			// gbc.fill = gbc.NONE; gbc.anchor = gbc.EAST;
			Panel p2 = new Panel();
			p1.setLayout(new GridLayout(5, 1));
			p2.setLayout(new GridLayout(4, 1));
			dr.getContentPane().add(p2);
			JLabel drMessage1 = new JLabel("Replace: ");
			JLabel drMessage2 = new JLabel("With: ");
			drMatchCase = new Checkbox("Match Case");
			tfro = new TextField(15);
			tfrn = new TextField(15);
			p1.add(drMessage1);
			p1.add(tfro);
			p1.add(drMessage2);
			p1.add(tfrn);
			p1.add(drMatchCase);
			brf = new Button("Find");
			// brf.addActionListener(this);
			brf.addActionListener(new ActionListener() {
				public void actionPerformed(ActionEvent brfe) {
					int a = 0, b = 0;
					String str1, str2, str3, str4, strA, strB;
					str1 = ta.getText();
					str2 = str1.toLowerCase();
					str3 = tfro.getText();
					str4 = str3.toLowerCase();
					if (drMatchCase.getState()) {
						strA = str1;
						strB = str3;
					} else {
						strA = str2;
						strB = str4;
					}
					a = strA.indexOf(strB, FindStartPos);
					if (a > -1) {
						ta.setCaretPosition(a);
						b = tfro.getText().length();
						ta.select(a, a + b);
						FindStartPos = a + b;
						foundCount++;
					} else {
						JOptionPane.showMessageDialog(null, "End of file.",
								"Result", 1);
						foundCount = 0;
					}
				}
			});
			brr = new Button("Replace");
			brr.addActionListener(new ActionListener() {
				public void actionPerformed(ActionEvent brre) {
					if (tfrn.getText().length() == 0
							&& ta.getSelectedText() != null)
						ta.replaceSelection("");
					if (tfrn.getText().length() > 0
							&& ta.getSelectedText() != null)
						ta.replaceSelection(tfrn.getText());
					int a = 0, b = 0;
					String str1, str2, str3, str4, strA, strB;
					str1 = ta.getText();
					str2 = str1.toLowerCase();
					str3 = tfro.getText();
					str4 = str3.toLowerCase();
					if (drMatchCase.getState()) {
						strA = str1;
						strB = str3;
					} else {
						strA = str2;
						strB = str4;
					}
					a = strA.indexOf(strB, FindStartPos);
					if (a > -1) {
						ta.setCaretPosition(a);
						b = tfro.getText().length();
						ta.select(a, a + b);
						FindStartPos = a + b;
						foundCount++;
					} else {
						JOptionPane.showMessageDialog(null, "End of file.",
								"Result", 1);
						foundCount = 0;
					}
				}
			});
			brra = new Button("Replace All");
			brra.addActionListener(new ActionListener() {
				public void actionPerformed(ActionEvent brrae) {
					int a = 0;
					while (a > -1) {
						int b = 0;
						String str1, str2, str3, str4, strA, strB;
						str1 = ta.getText();
						str2 = str1.toLowerCase();
						str3 = tfro.getText();
						str4 = str3.toLowerCase();
						if (drMatchCase.getState()) {
							strA = str1;
							strB = str3;
						} else {
							strA = str2;
							strB = str4;
						}
						a = strA.indexOf(strB, FindStartPos);
						if (a > -1) {
							ta.setCaretPosition(a);
							b = tfro.getText().length();
							ta.select(a, a + b);
							FindStartPos = a + b;
							foundCount++;
						} else {
							JOptionPane.showMessageDialog(null, "End of file.",
									"Result", 1);
							foundCount = 0;
						}
						if (tfrn.getText().length() == 0
								&& ta.getSelectedText() != null)
							ta.replaceSelection("");
						if (tfrn.getText().length() > 0
								&& ta.getSelectedText() != null)
							ta.replaceSelection(tfrn.getText());
					}
				}
			});
			Button brc = new Button("Cancel");
			brc.addActionListener(new ActionListener() {
				public void actionPerformed(ActionEvent brce) {
					dispose();
				}
			});
			p2.add(brf);
			p2.add(brr);
			p2.add(brra);
			p2.add(brc);
			dr.setResizable(false);
			dr.setLocation(120, 120);
			dr.addWindowListener(new WindowAdapter() {
				public void windowClosing(WindowEvent e) {
					dispose();
					FindStartPos = 0;
				}
			});
			dr.setSize(220, 138);
			dr.setVisible(true);

		} else if (ae.getSource() == menuEditGoTo) {
			JDialog dg = new JDialog(this, "Line Number", true);
			dg.getContentPane().setLayout(new FlowLayout());
			final JTextField dgtf = new JTextField(4);
			Button dgOk = new Button("Go To");
			dgOk.addActionListener(new ActionListener() {
				public void actionPerformed(ActionEvent brce) {
					int totalLine = ta.getLineCount();
					int[] lineNumber = new int[totalLine + 1];
					String s = ta.getText();
					int pos = 0, t = 0;
					while (true) {
						pos = s.indexOf('\12', pos);
						if (pos == -1)
							break;
						lineNumber[t++] = pos++;
					}
					int gt = 1;
					try {
						gt = Integer.parseInt(dgtf.getText());
					} catch (NumberFormatException efe) {
						JOptionPane.showMessageDialog(null,
								"Please enter an integer.", "Input", 1);
					}
					if (gt < 2 || gt >= totalLine) {
						if (gt < 2)
							ta.setCaretPosition(0);
						else
							ta.setCaretPosition(s.length());
					} else
						ta.setCaretPosition(lineNumber[gt - 2] + 1);
					dispose();
				}
			});
			Button dgCancel = new Button("Cancel");
			dgCancel.addActionListener(new ActionListener() {
				public void actionPerformed(ActionEvent brce) {
					dispose();
				}
			});
			dg.getContentPane().add(dgtf);
			dg.getContentPane().add(dgOk);
			dg.getContentPane().add(dgCancel);
			dg.setResizable(false);
			dg.setLocation(120, 120);
			dg.addWindowListener(new WindowAdapter() {
				public void windowClosing(WindowEvent e) {
					dispose();
				}
			});
			dg.setSize(180, 60);
			dg.setVisible(true);
		} else if (ae.getSource() == menuEditSelectAll) {
			ta.selectAll();
		} else if (ae.getSource() == menuViewFont) {
			MenuFont mf = new MenuFont(this, true);
			ta.setFont(mf.myLayout(ta.getFont()));
		} else if (ae.getSource() == menuViewColor) {
			MenuColor mc = new MenuColor(this, true);
			Color[] fbgc = new Color[2];
			fbgc = mc.myLayout(ta.getForeground(), ta.getBackground());
			ta.setForeground(fbgc[0]);
			ta.setBackground(fbgc[1]);
			ta.setCaretColor(fbgc[0]);
		} else if (ae.getSource() == menuViewClassic) {
			if (menuViewClassic.getState()) {
				ta.setForeground(new Color(0, 255, 0));
				ta.setBackground(new Color(45, 0, 45));
				ta.setFont(new Font("Serif", Font.BOLD, 16));
				ta.setCaretColor(new Color(0, 255, 0));
			} else {
				ta.setForeground(defaultForeground);
				ta.setBackground(defaultBackground);
				ta.setFont(defaultFont);
				ta.setCaretColor(defaultCaretColor);
			}
		} else if (ae.getSource() == menuViewStatus) {
			if (menuViewStatus.getState()) {
				showStatus();
			}
		} else if (ae.getSource() == menuViewWordWrap) {
			if (menuViewWordWrap.getState()) {
				ta.setLineWrap(true);
			} else {
				ta.setLineWrap(false);
			}
		} else if (ae.getSource() == menuViewDoubleSpace) {
			int pos = 0, t = 0;
			String str = ta.getText();
			while (true) {
				pos = str.indexOf('\15', pos);
				if (pos == -1)
					break;
				str = str.substring(0, pos) + '\15' + '\12'
						+ str.substring(pos);
				pos = pos + 3;
			}
			ta.setText(str);
		} else if (ae.getSource() == menuHelpAbout) {
			dl = new JDialog(this, "About MiniEditor", true);
			dl.getContentPane().setLayout(new GridLayout(3, 3));
			dl.setBackground(new Color(212, 208, 200));
			Button bOk = new Button("OK");
			bOk.addActionListener(new ActionListener() {
				public void actionPerformed(ActionEvent bOke) {
					dispose();
				}
			});
			Label ver = new Label("Version .9");
			Label null1 = new Label();
			Label null2 = new Label();
			Label null3 = new Label();
			Label null4 = new Label();
			Label null5 = new Label();
			Label null6 = new Label();
			Label null7 = new Label();
			dl.getContentPane().add(null1);
			dl.getContentPane().add(ver);
			dl.getContentPane().add(null2);
			dl.getContentPane().add(null3);
			dl.getContentPane().add(bOk);
			dl.getContentPane().add(null4);
			dl.getContentPane().add(null5);
			dl.getContentPane().add(null6);
			dl.getContentPane().add(null7);
			bOk.addActionListener(this);
			dl.addWindowListener(new WindowAdapter() {
				public void windowClosing(WindowEvent e) {
					dispose();
				}
			});
			dl.setLocation(120, 120);
			dl.setResizable(false);
			dl.setSize(200, 80);
			dl.setVisible(true);

		}
	}// end of ActionListener

	// DocumentListener
	public void removeUpdate(DocumentEvent e) {
		String s;
		s = fileStatus.getText();
		if (!s.endsWith("*") & beginTextListener & !isNewFile) {
			fileStatus.setText("*");
		}
		menuEditUndo.setEnabled(true);
	}

	public void insertUpdate(DocumentEvent e) {
		String s;
		s = fileStatus.getText();
		if (!s.endsWith("*") & beginTextListener & !isNewFile) {
			fileStatus.setText("*");
		}
		menuEditUndo.setEnabled(true);
	}

	public void changedUpdate(DocumentEvent e) {
		String s;
		s = fileStatus.getText();
		if (!s.endsWith("*") & beginTextListener & !isNewFile) {
			fileStatus.setText("*");
		}
		menuEditUndo.setEnabled(true);
	}

	// end of DocumentListener

	// Caretlistener
	public void caretUpdate(CaretEvent e) {
		if (menuViewStatus.getState())
			showStatus();
	}// end of Caretlistener

	// KeyListener
	public void keyPressed(KeyEvent e) {
		if (e.getKeyCode() == '\10') {
			BACKSPACE = true;
		}
		// if(menuViewStatus.getState())
		// showStatus();
	}

	public void keyReleased(KeyEvent e) {
		if (e.getKeyCode() == 155) { // ESCAPE = 155
			if (INSERTMODE)
				INSERTMODE = false;
			else
				INSERTMODE = true;
		}
		if (menuViewStatus.getState())
			showStatus();
	}

	public void keyTyped(KeyEvent e) {
		beginTextListener = true;
		isNewFile = false;
		if (!BACKSPACE) {
			if (!INSERTMODE) {
				int pos = ta.getCaretPosition();
				char c = ta.getText().charAt(pos);
				if (c == '\12') {
				} else if (c == '\15') {
				} else {
					ta.replaceRange("", pos, pos + 1);
				}
			}
		}
		BACKSPACE = false;
	}// end of KeyListener

	void showStatus() {
		int rows, cols, from, current, to, fileSize;
		rows = cols = from = current = 0;
		to = ta.getCaretPosition();
		fileSize = 0;
		String str = ta.getText();
		cols = to - str.substring(0, to).lastIndexOf(10);
		fileSize = str.length();
		String mode;
		if (INSERTMODE) {
			mode = "INSERT";
		} else {
			mode = "OVERLAY";
		}
		try {
			rows = ta.getLineOfOffset(to) + 1;
		} catch (BadLocationException ble) {
		}
		statusRow.setText("row: " + rows);
		statusCol.setText("col: " + cols);
		statusMode.setText("mode: " + mode);
		statusSize.setText("size: " + fileSize);
		// fileStatus.setText("file status: ");
	}

	int wordLocation(String str, int pos, boolean isToRight) {
		char c;
		if (isToRight) {
			c = str.charAt(pos);
			while (true) {
				if (c < 48)
					break;
				else if (c > 57 & c < 65)
					break;
				else if (c > 90 & c < 97)
					break;
				else if (c > 122)
					break;
				pos++;
				c = str.charAt(pos);
			}
			return pos--;
		} else {
			pos--;
			c = str.charAt(pos);
			while (true) {
				if (c < 48)
					break;
				else if (c > 57 & c < 65)
					break;
				else if (c > 90 & c < 97)
					break;
				else if (c > 122)
					break;
				pos--;
				c = str.charAt(pos);
			}
			return pos++;
		}

	}

	class UndoHandler implements UndoableEditListener {
		public void undoableEditHappened(UndoableEditEvent uee) {
			undo.addEdit(uee.getEdit());
		}
	}

}// end of class MiniEditor