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1
14 package org.wings.plaf.css;
15
16 import org.apache.commons.logging.Log;
17 import org.apache.commons.logging.LogFactory;
18 import org.wings.*;
19 import org.wings.io.Device;
20
21 import java.io.IOException  ;
22
23
28 public class ScrollBarCG
29 extends org.wings.plaf.css.AbstractComponentCG
30 implements org.wings.plaf.ScrollBarCG
31 {
32 private final static transient Log log = LogFactory.getLog(ScrollBarCG.class);
33 public static final int FORWARD = 0;
34 public static final int BACKWARD = 1;
35 public static final int FORWARD_BLOCK = 2;
36 public static final int BACKWARD_BLOCK = 3;
37 public static final int FIRST = 4;
38 public static final int LAST = 5;
39 private final static SIcon[][][] DEFAULT_ICONS = new SIcon[2][6][2];
40
41 static {
42 String [] postfixes = new String [6];
43 String [] prefixes = new String [6];
44 for (int orientation = 0; orientation < 2; orientation++) {
45 prefixes[BACKWARD] = "";
46 prefixes[FORWARD] = "";
47 prefixes[FIRST] = "Margin";
48 prefixes[LAST] = "Margin";
49 prefixes[FORWARD_BLOCK] = "Block";
50 prefixes[BACKWARD_BLOCK] = "Block";
51 if (orientation == SConstants.VERTICAL) {
52 postfixes[BACKWARD] = "Up";
53 postfixes[FORWARD] = "Down";
54 postfixes[FIRST] = "Up";
55 postfixes[LAST] = "Down";
56 postfixes[BACKWARD_BLOCK] = "Up";
57 postfixes[FORWARD_BLOCK] = "Down";
58 } else {
59 postfixes[BACKWARD] = "Left";
60 postfixes[FORWARD] = "Right";
61 postfixes[FIRST] = "Left";
62 postfixes[LAST] = "Right";
63 postfixes[BACKWARD_BLOCK] = "Left";
64 postfixes[FORWARD_BLOCK] = "Right";
65 }
66
67 for (int direction = 0; direction < postfixes.length; direction++) {
68 DEFAULT_ICONS[orientation][direction][0] =
69 new SResourceIcon("org/wings/icons/"
70 + prefixes[direction]
71 + "Scroll"
72 + postfixes[direction] + ".gif");
73 DEFAULT_ICONS[orientation][direction][1] =
74 new SResourceIcon("org/wings/icons/Disabled"
75 + prefixes[direction]
76 + "Scroll"
77 + postfixes[direction] + ".gif");
78 }
79 }
80 }
81
82 public void writeContent(Device d, SComponent c)
83 throws IOException {
84 log.debug("write = " + c);
85 SScrollBar sb = (SScrollBar) c;
86
87 if (sb.getOrientation() == SConstants.VERTICAL)
88 writeVerticalScrollbar(d, sb);
89 else
90 writeHorizontalScrollbar(d, sb);
91 }
92
93 private void writeVerticalScrollbar(Device d, SScrollBar sb) throws IOException {
94 int value = sb.getValue();
95 int blockIncrement = sb.getBlockIncrement();
96 int extent = sb.getExtent();
97 int minimum = sb.getMinimum();
98 int maximum = sb.getMaximum();
99 int last = maximum - extent;
100 boolean backEnabled = value > minimum;
101 boolean forwardEnabled = value < maximum - extent;
102
103 d.print("<table orientation=\"vertical\" class=\"SLayout\"><tbody>\n")
104 .print("<tr height=\"1%\">\n")
105 .print("<td height=\"1%\" class=\"SLayout\"><table class=\"SLayout\" area=\"buttons\"><tbody>\n");
106
107 d.print("<tr><td class=\"SLayout\">");
108 writeButton(d, sb, DEFAULT_ICONS[SConstants.VERTICAL][FIRST][0], "" + minimum);
109 d.print("</td></tr>\n");
110 d.print("<tr><td class=\"SLayout\">");
111 writeButton(d, sb, DEFAULT_ICONS[SConstants.VERTICAL][BACKWARD_BLOCK][0], "" + (Math.max(minimum, value - blockIncrement)));
112 d.print("</td></tr>\n");
113 d.print("<tr><td class=\"SLayout\">");
114 writeButton(d, sb, DEFAULT_ICONS[SConstants.VERTICAL][BACKWARD][0], "" + (value - 1));
115 d.print("</td></tr>\n");
116
117 d.print("</tbody></table></td>\n")
118 .print("</tr>\n")
119 .print("<tr height=\"100%\">\n")
120 .print("<td class=\"SLayout\"><table area=\"slider\" height=\"100%\" class=\"SLayout\"><tbody>\n");
121
122 int range = maximum - minimum;
123 int iconWidth = DEFAULT_ICONS[SConstants.VERTICAL][FIRST][0].getIconWidth();
124 verticalArea(d, "#eeeeff", value * 100 / range, iconWidth);
125 verticalArea(d, "#cccccc", extent * 100 / range, iconWidth);
126 verticalArea(d, "#eeeeff", (range - value - extent) * 100 / range, iconWidth);
127
128 d.print("</tbody></table></td>\n")
129 .print("</tr>\n")
130 .print("<tr height=\"1%\">\n")
131 .print("<td height=\"1%\" class=\"SLayout\"><table area=\"buttons\" class=\"SLayout\"><tbody>\n");
132
133 d.print("<tr><td class=\"SLayout\">");
134 writeButton(d, sb, DEFAULT_ICONS[SConstants.VERTICAL][FORWARD][0], "" + (value + 1));
135 d.print("</td></tr>\n");
136 d.print("<tr><td class=\"SLayout\">");
137 writeButton(d, sb, DEFAULT_ICONS[SConstants.VERTICAL][FORWARD_BLOCK][0], "" + (Math.min(last, value + blockIncrement)));
138 d.print("</td></tr>\n");
139 d.print("<tr><td class=\"SLayout\">");
140 writeButton(d, sb, DEFAULT_ICONS[SConstants.VERTICAL][LAST][0], "" + last);
141 d.print("</td></tr>\n");
142
143 d.print("</tbody></table></td>\n")
144 .print("</tr>\n")
145 .print("</tbody></table>");
146 }
147
148 private void verticalArea(Device d, String s, int v, int iconWidth) throws IOException {
149 d.print("<tr><td class=\"SLayout\" style=\"background-color: ");
150 d.print(s);
151 d.print("\" height=\"");
152 d.print(v + "%");
153 d.print("\" width=\"");
154 d.print(iconWidth);
155 d.print("\"></td></tr>\n");
156 }
157
158 private void writeHorizontalScrollbar(Device d, SScrollBar sb) throws IOException {
159 int value = sb.getValue();
160 int blockIncrement = sb.getBlockIncrement();
161 int extent = sb.getExtent();
162 int minimum = sb.getMinimum();
163 int maximum = sb.getMaximum();
164 int last = maximum - extent;
165 boolean backEnabled = value > minimum;
166 boolean forwardEnabled = value < maximum - extent;
167
168 d.print("<table orientation=\"horizontal\" class=\"SLayout\"><tbody><tr>\n")
169 .print("<td width=\"1%\" class=\"SLayout\"><table area=\"buttons\" class=\"SLayout\"><tbody><tr>\n");
170
171 d.print("<td class=\"SLayout\">");
172 writeButton(d, sb, DEFAULT_ICONS[SConstants.HORIZONTAL][FIRST][0], "" + minimum);
173 d.print("</td>\n");
174 d.print("<td class=\"SLayout\">");
175 writeButton(d, sb, DEFAULT_ICONS[SConstants.HORIZONTAL][BACKWARD_BLOCK][0], "" + (Math.max(minimum, value - blockIncrement)));
176 d.print("</td>\n");
177 d.print("<td class=\"SLayout\">");
178 writeButton(d, sb, DEFAULT_ICONS[SConstants.HORIZONTAL][BACKWARD][0], "" + (value - 1));
179 d.print("</td>\n");
180
181 d.print("</tr></tbody></table></td>\n")
182 .print("<td width=\"100%\" class=\"SLayout\"><table area=\"slider\" width=\"100%\" class=\"SLayout\"><tbody><tr>\n");
183
184 int range = maximum - minimum;
185 int iconHeight = DEFAULT_ICONS[SConstants.HORIZONTAL][FIRST][0].getIconHeight();
186 horizontalArea(d, "#eeeeff", value * 100 / range, iconHeight);
187 horizontalArea(d, "#cccccc", extent * 100 / range, iconHeight);
188 horizontalArea(d, "#eeeeff", (range - value - extent) * 100 / range, iconHeight);
189
190 d.print("</tr></tbody></table></td>\n")
191 .print("<td width=\"1%\" class=\"SLayout\"><table area=\"buttons\"><tbody><tr>\n");
192
193 d.print("<td class=\"SLayout\">");
194 writeButton(d, sb, DEFAULT_ICONS[SConstants.HORIZONTAL][FORWARD][0], "" + (value + 1));
195 d.print("</td>\n");
196 d.print("<td class=\"SLayout\">");
197 writeButton(d, sb, DEFAULT_ICONS[SConstants.HORIZONTAL][FORWARD_BLOCK][0], "" + (Math.min(last, value + blockIncrement)));
198 d.print("</td>\n");
199 d.print("<td class=\"SLayout\">");
200 writeButton(d, sb, DEFAULT_ICONS[SConstants.HORIZONTAL][LAST][0], "" + last);
201 d.print("</td>\n");
202
203 d.print("</tr></tbody></table></td>\n")
204 .print("</tr></tbody></table>");
205 }
206
207 private void horizontalArea(Device d, String s, int v, int iconHeight) throws IOException {
208 d.print("<td class=\"SLayout\" style=\"background-color: ");
209 d.print(s);
210 d.print("\" width=\"");
211 d.print(v + "%");
212 d.print("\" height=\"");
213 d.print(iconHeight);
214 d.print("\"></td>\n");
215 }
216
217 private void writeButton(Device device, SScrollBar scrollBar, SIcon icon, String event) throws IOException {
218 boolean childSelectorWorkaround = !scrollBar.getSession().getUserAgent().supportsCssChildSelector();
219 boolean showAsFormComponent = scrollBar.getShowAsFormComponent();
220
221 if (showAsFormComponent) {
222 writeButtonStart(device, scrollBar, event);
223 device.print(" type=\"submit\" name=\"")
224 .print(Utils.event(scrollBar))
225 .print("\" value=\"")
226 .print(event)
227 .print("\"");
228 } else {
229 device.print("<a HREF=\"")
230 .print(scrollBar.getRequestURL()
231 .addParameter(Utils.event(scrollBar) + "=" + event).toString())
232 .print("\"");
233 }
234 device.print(">");
235
236 device.print("<img");
237 Utils.optAttribute(device, "src", icon.getURL());
238 Utils.optAttribute(device, "width", icon.getIconWidth());
239 Utils.optAttribute(device, "height", icon.getIconHeight());
240 device.print(" alt=\"");
241 device.print(icon.getIconTitle());
242 device.print("\"/>");
243
244 if (showAsFormComponent)
245 device.print("</button>\n");
246 else
247 device.print("</a>\n");
248 }
249
250
256 protected void writeButtonStart(Device device, SScrollBar scrollBar, String event) throws IOException {
257 device.print("<button");
258 }
259 }
260 |
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