Java examples for Swing:JSpinner
Change spinner text color based on value
/*//w ww . j av a 2 s .c o m * Based on SpinnerDemo, this application listens for * changes in a spinner's values. Specifically, we listen * for when the third spinner changes and then change that * spinner's text color accordingly. * Other files required: * SpringUtilities.java * CyclingSpinnerListModel.java */ import java.awt.Color; import java.awt.Container; import java.util.Calendar; import java.util.Date; import javax.swing.BorderFactory; import javax.swing.JComponent; import javax.swing.JFormattedTextField; import javax.swing.JFrame; import javax.swing.JLabel; import javax.swing.JPanel; import javax.swing.JSpinner; import javax.swing.JTextField; import javax.swing.SpinnerDateModel; import javax.swing.SpinnerListModel; import javax.swing.SpinnerModel; import javax.swing.SpinnerNumberModel; import javax.swing.SpringLayout; import javax.swing.SwingUtilities; import javax.swing.UIManager; import javax.swing.event.ChangeEvent; import javax.swing.event.ChangeListener; /** * This 1.4 example is used by the various SpinnerDemos. It implements a * SpinnerListModel that works only with an Object array and that implements * cycling (the next value and previous value are never null). It also lets you * optionally associate a spinner model that's linked to this one, so that when * a cycle occurs the linked spinner model is updated. * * The SpinnerDemos use the CyclingSpinnerListModel for a month spinner that (in * SpinnerDemo3) is tied to the year spinner, so that -- for example -- when the * month changes from December to January, the year increases. */ class CyclingSpinnerListModel extends SpinnerListModel { Object firstValue, lastValue; SpinnerModel linkedModel = null; public CyclingSpinnerListModel(Object[] values) { super(values); firstValue = values[0]; lastValue = values[values.length - 1]; } public void setLinkedModel(SpinnerModel linkedModel) { this.linkedModel = linkedModel; } public Object getNextValue() { Object value = super.getNextValue(); if (value == null) { value = firstValue; if (linkedModel != null) { linkedModel.setValue(linkedModel.getNextValue()); } } return value; } public Object getPreviousValue() { Object value = super.getPreviousValue(); if (value == null) { value = lastValue; if (linkedModel != null) { linkedModel.setValue(linkedModel.getPreviousValue()); } } return value; } } public class SpinnerDemo3 extends JPanel implements ChangeListener { protected Calendar calendar; protected JSpinner dateSpinner; protected Color SPRING_COLOR = new Color(0, 204, 51); protected Color SUMMER_COLOR = Color.RED; protected Color FALL_COLOR = new Color(255, 153, 0); protected Color WINTER_COLOR = Color.CYAN; public SpinnerDemo3(boolean cycleMonths) { super(new SpringLayout()); String[] labels = { "Month: ", "Year: ", "Another Date: " }; int numPairs = labels.length; calendar = Calendar.getInstance(); JFormattedTextField ftf = null; // Add the first label-spinner pair. String[] monthStrings = getMonthStrings(); // get month names SpinnerListModel monthModel = null; if (cycleMonths) { // use custom model monthModel = new CyclingSpinnerListModel(monthStrings); } else { // use standard model monthModel = new SpinnerListModel(monthStrings); } JSpinner spinner = addLabeledSpinner(this, labels[0], monthModel); // Tweak the spinner's formatted text field. ftf = getTextField(spinner); if (ftf != null) { ftf.setColumns(8); // specify more width than we need ftf.setHorizontalAlignment(JTextField.RIGHT); } // Add second label-spinner pair. int currentYear = calendar.get(Calendar.YEAR); SpinnerModel yearModel = new SpinnerNumberModel(currentYear, // initial // value currentYear - 100, // min currentYear + 100, // max 1); // step // If we're cycling, hook this model up to the month model. if (monthModel instanceof CyclingSpinnerListModel) { ((CyclingSpinnerListModel) monthModel).setLinkedModel(yearModel); } spinner = addLabeledSpinner(this, labels[1], yearModel); // Make the year be formatted without a thousands separator. spinner.setEditor(new JSpinner.NumberEditor(spinner, "#")); // Add the third label-spinner pair. Date initDate = calendar.getTime(); calendar.add(Calendar.YEAR, -100); Date earliestDate = calendar.getTime(); calendar.add(Calendar.YEAR, 200); Date latestDate = calendar.getTime(); SpinnerDateModel dateModel = new SpinnerDateModel(initDate, earliestDate, latestDate, Calendar.YEAR);// ignored for user input dateSpinner = spinner = addLabeledSpinner(this, labels[2], dateModel); spinner.setEditor(new JSpinner.DateEditor(spinner, "MM/yyyy")); // Tweak the spinner's formatted text field. ftf = getTextField(spinner); if (ftf != null) { ftf.setHorizontalAlignment(JTextField.RIGHT); ftf.setBorder(BorderFactory.createEmptyBorder(1, 1, 1, 3)); } spinner.setBorder(BorderFactory.createLineBorder(Color.BLACK, 1)); // XXX: No easy way to get to the buttons and change their border. setSeasonalColor(dateModel.getDate()); // initialize color // Listen for changes on the date spinner. dateSpinner.addChangeListener(this); // Lay out the panel. // SpringUtilities.makeCompactGrid(this, numPairs, 2, // rows, cols // 10, 10, // initX, initY // 6, 10); // xPad, yPad } /** * Return the formatted text field used by the editor, or null if the editor * doesn't descend from JSpinner.DefaultEditor. */ public JFormattedTextField getTextField(JSpinner spinner) { JComponent editor = spinner.getEditor(); if (editor instanceof JSpinner.DefaultEditor) { return ((JSpinner.DefaultEditor) editor).getTextField(); } else { System.err.println("Unexpected editor type: " + spinner.getEditor().getClass() + " isn't a descendant of DefaultEditor"); return null; } } /** * Required by the ChangeListener interface. Listens for changes in the date * spinner and does something silly in response. */ public void stateChanged(ChangeEvent e) { SpinnerModel dateModel = dateSpinner.getModel(); if (dateModel instanceof SpinnerDateModel) { setSeasonalColor(((SpinnerDateModel) dateModel).getDate()); } } protected void setSeasonalColor(Date date) { calendar.setTime(date); int month = calendar.get(Calendar.MONTH); JFormattedTextField ftf = getTextField(dateSpinner); if (ftf == null) return; // Set the color to match northern hemisphere seasonal conventions. switch (month) { case 2: // March case 3: // April case 4: // May ftf.setForeground(SPRING_COLOR); break; case 5: // June case 6: // July case 7: // August ftf.setForeground(SUMMER_COLOR); break; case 8: // September case 9: // October case 10: // November ftf.setForeground(FALL_COLOR); break; default: // December, January, February ftf.setForeground(WINTER_COLOR); } } /** * DateFormatSymbols returns an extra, empty value at the end of the array of * months. Remove it. */ static protected String[] getMonthStrings() { String[] months = new java.text.DateFormatSymbols().getMonths(); int lastIndex = months.length - 1; if (months[lastIndex] == null || months[lastIndex].length() <= 0) { // last // item // empty String[] monthStrings = new String[lastIndex]; System.arraycopy(months, 0, monthStrings, 0, lastIndex); return monthStrings; } else { // last item not empty return months; } } static protected JSpinner addLabeledSpinner(Container c, String label, SpinnerModel model) { JLabel l = new JLabel(label); c.add(l); JSpinner spinner = new JSpinner(model); l.setLabelFor(spinner); c.add(spinner); return spinner; } /** * Create the GUI and show it. For thread safety, this method should be * invoked from the event dispatch thread. */ private static void createAndShowGUI() { // Create and set up the window. JFrame frame = new JFrame("SpinnerDemo3"); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); // Add content to the window. frame.add(new SpinnerDemo3(true)); // Display the window. frame.pack(); frame.setVisible(true); } public static void main(String[] args) { // Schedule a job for the event dispatch thread: // creating and showing this application's GUI. SwingUtilities.invokeLater(new Runnable() { public void run() { // Turn off metal's use of bold fonts UIManager.put("swing.boldMetal", Boolean.FALSE); createAndShowGUI(); } }); } } /* * Copyright (c) 1995, 2008, Oracle and/or its affiliates. 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