Demo


1   package thinlet.demo;
2   
3   import java.awt.*;
4   import java.io.*;
5   
6   import thinlet.*;
7   
8   /**
9    * Simple demonstration of widgets and events
10   */
11  public class Demo extends Thinlet {
12  
13      /**
14       * Loads the xml file
15       */
16      public Demo() throws Exception   {
17          add(parse("demo.xml"));
18      }
19      
20      /**
21       * Creates a frame including this thinlet demo
22       */
23      public static void main(String  [] args) throws Exception   {
24          new FrameLauncher("Demo", new Demo(), 320, 320);
25      }
26      
27      /**
28       * Called if the demo.xml was loaded,
29       * it fills the textarea from a resource file
30       */
31      public void loadText(Object   textarea) throws Exception   {
32          BufferedReader reader = new BufferedReader(new InputStreamReader(
33              getClass().getResourceAsStream("demodialog.xml")));
34          StringBuffer   text = new StringBuffer  ();
35          for (int c = reader.read(); c != -1; c = reader.read()) {
36              if (((c > 0x1f) && (c < 0x7f)) ||
37                      ((c > 0x9f) && (c < 0xffff)) || (c == '\n')) {
38                  text.append((char) c);
39              }
40              else if (c == '\t') {
41                  text.append("  ");
42              }
43          }
44          reader.close();
45          setString(textarea, "text", text.toString());
46      }
47  
48      /**
49       * Updates textarea's editable property depending on a checkbox state
50       */
51      public void changeEditable(boolean editable, Object   textarea) {
52          setBoolean(textarea, "editable", editable);
53      }
54  
55      /**
56       * Updates textarea's enabled property
57       */
58      public void changeEnabled(boolean enabled, Object   textarea) {
59          setBoolean(textarea, "enabled", enabled);
60      }
61  
62      Object   dialog;
63  
64      /**
65       * Shows the modal find dialog, creates only one dialog instance
66       */
67      public void showDialog() throws Exception   {
68          if (dialog == null) {
69              dialog = parse("demodialog.xml");
70          }
71          add(dialog);
72      }
73  
74      /**
75       * Updates the textarea's selection range,
76       * and add the search string to the history 
77       */
78      public void findText(Object   combobox, String   what,
79              boolean match, boolean down) {
80          closeDialog();
81          if (what.length() == 0) { return; }
82  
83          boolean cacheditem = false;
84          for (int i = getCount(combobox) - 1; i >= 0; i--) {
85              String   choicetext = getString(getItem(combobox, i), "text");
86              if (what.equals(choicetext)) { cacheditem = true; break; }
87          }
88          if (!cacheditem) {
89              Object   choice = create("choice");
90              setString(choice, "text", what);
91              add(combobox, choice);
92          }
93  
94          Object   textarea = find("textarea");
95          int end = getInteger(textarea, "end");
96          String   text = getString(textarea, "text");
97          
98          if (!match) {
99              what = what.toLowerCase();
100             text = text.toLowerCase();
101         }
102 
103         int index = text.indexOf(what, down ? end : 0);
104         if (!down && (index != -1) && (index >= end)) { index = -1; }
105         if (index != -1) {
106             setInteger(textarea, "start", index);
107             setInteger(textarea, "end", index + what.length());
108             requestFocus(textarea);
109         }
110         else {
111             getToolkit().beep();
112         }
113     }
114 
115     /**
116      * Closes the dialog
117      */
118     public void closeDialog() {
119         remove(dialog);
120     }
121     
122     /**
123      * Insert a new item into the list
124      */
125     public void insertList(Object   list) {
126         Object   item = create("item");
127         setString(item, "text", "New item");
128         setIcon(item, "icon", getIcon("/icon/library.gif"));
129         add(list, item, 0);
130 //      System.out.println("> click " + System.currentTimeMillis());
131 //      try { Thread.sleep(5000); } catch (InterruptedException ie) {}
132     }
133 
134     /**
135      * Removes the selected items from the list
136      */
137     public void deleteList(Object   delete, Object   list) {
138         for (int i = getCount(list) - 1; i >= 0; i--) {
139             Object   item = getItem(list, i);
140             if (getBoolean(item, "selected")) {
141                 remove(item);
142             }
143         }
144         setBoolean(delete, "enabled", false);
145     }
146     
147     /**
148      * Delete button's state depends on the list selection
149      */
150     public void changeSelection(Object   list, Object   delete) {
151         setBoolean(delete, "enabled", getSelectedIndex(list) != -1);
152     }
153 
154     /**
155      * Clears list selection and updates the selection model
156      */
157     public void setSelection(Object   list, String   selection, Object   delete) {
158         for (int i = getCount(list) - 1; i >= 0; i--) {
159             setBoolean(getItem(list, i), "selected", false);
160         }
161         setChoice(list, "selection", selection);
162         setBoolean(delete, "enabled", false);
163     }
164     
165     /**
166      *
167      */
168     public void sliderChanged(int value, Object   spinbox) {
169         setString(spinbox, "text", String.valueOf(value));
170         hsbChanged();
171     }
172     
173     /**
174      *
175      */
176     public void spinboxChanged(String   text, Object   slider) {
177         try {
178             int value = Integer.parseInt(text);
179             if ((value >= 0) && (value <= 255)) {
180                 setInteger(slider, "value", value);
181                 hsbChanged();
182             }
183         } catch (NumberFormatException   nfe) { getToolkit().beep(); }
184     }
185     
186     private Object   sl_red, sl_green, sl_blue;
187     private Object   tf_hue, tf_saturation, tf_brightness;
188     private Object   pb_hue, pb_saturation, pb_brightness;
189     private Object   rgb_label;
190     
191     /**
192      *
193      */
194     public void storeWidgets(Object   sl_red, Object   sl_green, Object   sl_blue,
195             Object   tf_hue, Object   tf_saturation, Object   tf_brightness,
196             Object   pb_hue, Object   pb_saturation, Object   pb_brightness, Object   rgb_label) {
197         this.sl_red = sl_red;
198         this.sl_green = sl_green;
199         this.sl_blue = sl_blue;
200         this.tf_hue = tf_hue;
201         this.tf_saturation = tf_saturation;
202         this.tf_brightness = tf_brightness;
203         this.pb_hue = pb_hue;
204         this.pb_saturation = pb_saturation;
205         this.pb_brightness = pb_brightness;
206         this.rgb_label = rgb_label;
207     }
208     
209     /**
210      *
211      */
212     private void hsbChanged() {
213         int red = getInteger(sl_red, "value");
214         int green = getInteger(sl_green, "value");
215         int blue = getInteger(sl_blue, "value");
216         
217         float[] hsb = Color.RGBtoHSB(red, green, blue, null);
218 
219         setString(tf_hue, "text", String.valueOf(hsb[0]));
220         setString(tf_saturation, "text", String.valueOf(hsb[1]));
221         setString(tf_brightness, "text", String.valueOf(hsb[2]));
222 
223         setInteger(pb_hue, "value", (int) (100f * hsb[0]));
224         setInteger(pb_saturation, "value", (int) (100f * hsb[1]));
225         setInteger(pb_brightness, "value", (int) (100f * hsb[2]));
226 
227         setColor(rgb_label, "background", new Color(red, green, blue));
228         setColor(rgb_label, "foreground", new Color(255 - red, 255 - green, 255 - blue));
229     }
230 }
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