42 import java.awt.*;
43 import java.awt.event.*;
44 import java.beans.*;
45 import java.util.*;
46 import java.io.*;
47 import java.applet.*;
48 import java.net.*;
49
50 /**
51 * List Demo. This demo shows that it is not
52 * always necessary to have an array of objects
53 * as big as the size of the list stored.
54 *
55 * Indeed, in this example, there is no array
56 * kept for the list data, rather it is generated
57 * on the fly as only those elements are needed.
58 *
59 * @author Jeff Dinkins
60 */
61 public class ListDemo extends DemoModule {
62 JList list;
63
64 JPanel prefixList;
65 JPanel suffixList;
66
67 Action prefixAction;
68 Action suffixAction;
69
70 GeneratedListModel listModel;
71
72 Vector checkboxes = new Vector();
73
74 /**
75 * main method allows us to run as a standalone demo.
76 */
77 public static void main(String[] args) {
78 ListDemo demo = new ListDemo(null);
79 demo.mainImpl();
80 }
81
82 /**
83 * ListDemo Constructor
84 */
85 public ListDemo(SwingSet2 swingset) {
86 super(swingset, "ListDemo", "toolbar/JList.gif");
87
88 loadImages();
89
90 JLabel description = new JLabel(getString("ListDemo.description"));
91 getDemoPanel().add(description, BorderLayout.NORTH);
92
93 JPanel centerPanel = new JPanel();
94 centerPanel.setLayout(new BoxLayout(centerPanel, BoxLayout.X_AXIS));
95 centerPanel.add(Box.createRigidArea(HGAP10));
96 getDemoPanel().add(centerPanel, BorderLayout.CENTER);
97
98 JPanel listPanel = new JPanel();
99 listPanel.setLayout(new BoxLayout(listPanel, BoxLayout.Y_AXIS));
100 listPanel.add(Box.createRigidArea(VGAP10));
101
102 centerPanel.add(listPanel);
103 centerPanel.add(Box.createRigidArea(HGAP30));
104
105 // Create the list
106 list = new JList();
107 list.setCellRenderer(new CompanyLogoListCellRenderer());
108 listModel = new GeneratedListModel(this);
109 list.setModel(listModel);
110
111 // Set the preferred row count. This affects the preferredSize
112 // of the JList when it's in a scrollpane.
113 list.setVisibleRowCount(22);
114
115 // Add list to a scrollpane
116 JScrollPane scrollPane = new JScrollPane(list);
117 listPanel.add(scrollPane);
118 listPanel.add(Box.createRigidArea(VGAP10));
119
120 // Add the control panel (holds the prefix/suffix list and prefix/suffix checkboxes)
121 centerPanel.add(createControlPanel());
122
123 // create prefixes and suffixes
124 addPrefix("Tera", true);
125 addPrefix("Micro", false);
126 addPrefix("Southern", false);
276 }
277 }
278
279 class UpdateSuffixListAction extends AbstractAction {
280 GeneratedListModel listModel;
281 protected UpdateSuffixListAction(GeneratedListModel listModel) {
282 this.listModel = listModel;
283 }
284
285 public void actionPerformed(ActionEvent e) {
286 JCheckBox cb = (JCheckBox) e.getSource();
287 if(cb.isSelected()) {
288 listModel.addSuffix(cb.getText());
289 } else {
290 listModel.removeSuffix(cb.getText());
291 }
292 }
293 }
294
295
296 class GeneratedListModel extends AbstractListModel {
297 ListDemo demo;
298 Permuter permuter;
299
300 public Vector prefix = new Vector();
301 public Vector suffix = new Vector();
302
303 public GeneratedListModel (ListDemo demo) {
304 this.demo = demo;
305 }
306
307 private void update() {
308 permuter = new Permuter(getSize());
309 fireContentsChanged(this, 0, getSize());
310 }
311
312 public void addPrefix(String s) {
313 if(!prefix.contains(s)) {
314 prefix.addElement(s);
315 update();
316 }
317 }
318
319 public void removePrefix(String s) {
320 prefix.removeElement(s);
321 update();
322 }
323
324 public void addSuffix(String s) {
325 if(!suffix.contains(s)) {
326 suffix.addElement(s);
327 update();
328 }
329 }
330
331 public void removeSuffix(String s) {
332 suffix.removeElement(s);
333 update();
334 }
335
336 public int getSize() {
337 return prefix.size() * suffix.size();
338 }
339
340 public Object getElementAt(int index) {
341 if(permuter == null) {
342 update();
343 }
344 // morph the index to another int -- this has the benefit of
345 // causing the list to look random.
346 int j = permuter.map(index);
347 int ps = prefix.size();
348 int ss = suffix.size();
349 return (String) prefix.elementAt(j%ps) + (String) suffix.elementAt((j/ps)%ss);
350 }
351 }
352
353 ImageIcon[] images = new ImageIcon[7];
354 void loadImages() {
355 images[0] = createImageIcon("list/red.gif", getString("ListDemo.red"));
356 images[1] = createImageIcon("list/blue.gif", getString("ListDemo.blue"));
357 images[2] = createImageIcon("list/yellow.gif", getString("ListDemo.yellow"));
358 images[3] = createImageIcon("list/green.gif", getString("ListDemo.green"));
359 images[4] = createImageIcon("list/gray.gif", getString("ListDemo.gray"));
360 images[5] = createImageIcon("list/cyan.gif", getString("ListDemo.cyan"));
361 images[6] = createImageIcon("list/magenta.gif", getString("ListDemo.magenta"));
362 }
363
364 class CompanyLogoListCellRenderer extends DefaultListCellRenderer {
365 public Component getListCellRendererComponent(
366 JList list,
367 Object value,
368 int index,
369 boolean isSelected,
370 boolean cellHasFocus)
371 {
372 Component retValue = super.getListCellRendererComponent(
373 list, value, index, isSelected, cellHasFocus
374 );
375 setIcon(images[index%7]);
376 return retValue;
377 }
378 }
379 }
|
42 import java.awt.*;
43 import java.awt.event.*;
44 import java.beans.*;
45 import java.util.*;
46 import java.io.*;
47 import java.applet.*;
48 import java.net.*;
49
50 /**
51 * List Demo. This demo shows that it is not
52 * always necessary to have an array of objects
53 * as big as the size of the list stored.
54 *
55 * Indeed, in this example, there is no array
56 * kept for the list data, rather it is generated
57 * on the fly as only those elements are needed.
58 *
59 * @author Jeff Dinkins
60 */
61 public class ListDemo extends DemoModule {
62 JList<String> list;
63
64 JPanel prefixList;
65 JPanel suffixList;
66
67 Action prefixAction;
68 Action suffixAction;
69
70 GeneratedListModel listModel;
71
72 Vector<JCheckBox> checkboxes = new Vector<>();
73
74 /**
75 * main method allows us to run as a standalone demo.
76 */
77 public static void main(String[] args) {
78 ListDemo demo = new ListDemo(null);
79 demo.mainImpl();
80 }
81
82 /**
83 * ListDemo Constructor
84 */
85 public ListDemo(SwingSet2 swingset) {
86 super(swingset, "ListDemo", "toolbar/JList.gif");
87
88 loadImages();
89
90 JLabel description = new JLabel(getString("ListDemo.description"));
91 getDemoPanel().add(description, BorderLayout.NORTH);
92
93 JPanel centerPanel = new JPanel();
94 centerPanel.setLayout(new BoxLayout(centerPanel, BoxLayout.X_AXIS));
95 centerPanel.add(Box.createRigidArea(HGAP10));
96 getDemoPanel().add(centerPanel, BorderLayout.CENTER);
97
98 JPanel listPanel = new JPanel();
99 listPanel.setLayout(new BoxLayout(listPanel, BoxLayout.Y_AXIS));
100 listPanel.add(Box.createRigidArea(VGAP10));
101
102 centerPanel.add(listPanel);
103 centerPanel.add(Box.createRigidArea(HGAP30));
104
105 // Create the list
106 list = new JList<>();
107 list.setCellRenderer(new CompanyLogoListCellRenderer());
108 listModel = new GeneratedListModel(this);
109 list.setModel(listModel);
110
111 // Set the preferred row count. This affects the preferredSize
112 // of the JList when it's in a scrollpane.
113 list.setVisibleRowCount(22);
114
115 // Add list to a scrollpane
116 JScrollPane scrollPane = new JScrollPane(list);
117 listPanel.add(scrollPane);
118 listPanel.add(Box.createRigidArea(VGAP10));
119
120 // Add the control panel (holds the prefix/suffix list and prefix/suffix checkboxes)
121 centerPanel.add(createControlPanel());
122
123 // create prefixes and suffixes
124 addPrefix("Tera", true);
125 addPrefix("Micro", false);
126 addPrefix("Southern", false);
276 }
277 }
278
279 class UpdateSuffixListAction extends AbstractAction {
280 GeneratedListModel listModel;
281 protected UpdateSuffixListAction(GeneratedListModel listModel) {
282 this.listModel = listModel;
283 }
284
285 public void actionPerformed(ActionEvent e) {
286 JCheckBox cb = (JCheckBox) e.getSource();
287 if(cb.isSelected()) {
288 listModel.addSuffix(cb.getText());
289 } else {
290 listModel.removeSuffix(cb.getText());
291 }
292 }
293 }
294
295
296 class GeneratedListModel extends AbstractListModel<String> {
297 ListDemo demo;
298 Permuter permuter;
299
300 public Vector<String> prefix = new Vector<>();
301 public Vector<String> suffix = new Vector<>();
302
303 public GeneratedListModel (ListDemo demo) {
304 this.demo = demo;
305 }
306
307 private void update() {
308 permuter = new Permuter(getSize());
309 fireContentsChanged(this, 0, getSize());
310 }
311
312 public void addPrefix(String s) {
313 if(!prefix.contains(s)) {
314 prefix.addElement(s);
315 update();
316 }
317 }
318
319 public void removePrefix(String s) {
320 prefix.removeElement(s);
321 update();
322 }
323
324 public void addSuffix(String s) {
325 if(!suffix.contains(s)) {
326 suffix.addElement(s);
327 update();
328 }
329 }
330
331 public void removeSuffix(String s) {
332 suffix.removeElement(s);
333 update();
334 }
335
336 public int getSize() {
337 return prefix.size() * suffix.size();
338 }
339
340 public String getElementAt(int index) {
341 if(permuter == null) {
342 update();
343 }
344 // morph the index to another int -- this has the benefit of
345 // causing the list to look random.
346 int j = permuter.map(index);
347 int ps = prefix.size();
348 int ss = suffix.size();
349 return (String) prefix.elementAt(j%ps) + (String) suffix.elementAt((j/ps)%ss);
350 }
351 }
352
353 ImageIcon[] images = new ImageIcon[7];
354 void loadImages() {
355 images[0] = createImageIcon("list/red.gif", getString("ListDemo.red"));
356 images[1] = createImageIcon("list/blue.gif", getString("ListDemo.blue"));
357 images[2] = createImageIcon("list/yellow.gif", getString("ListDemo.yellow"));
358 images[3] = createImageIcon("list/green.gif", getString("ListDemo.green"));
359 images[4] = createImageIcon("list/gray.gif", getString("ListDemo.gray"));
360 images[5] = createImageIcon("list/cyan.gif", getString("ListDemo.cyan"));
361 images[6] = createImageIcon("list/magenta.gif", getString("ListDemo.magenta"));
362 }
363
364 class CompanyLogoListCellRenderer extends DefaultListCellRenderer {
365 public Component getListCellRendererComponent(
366 JList<?> list,
367 Object value,
368 int index,
369 boolean isSelected,
370 boolean cellHasFocus)
371 {
372 Component retValue = super.getListCellRendererComponent(
373 list, value, index, isSelected, cellHasFocus
374 );
375 setIcon(images[index%7]);
376 return retValue;
377 }
378 }
379 }
|