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1
4 package org.wings.plaf.css;
5
6 import org.apache.commons.logging.Log;
7 import org.apache.commons.logging.LogFactory;
8 import org.wings.*;
9 import org.wings.io.Device;
10
11 import java.io.IOException  ;
12
13
18 public class PageScrollerCG extends AbstractComponentCG implements org.wings.plaf.PageScrollerCG {
19 private final static transient Log log = LogFactory.getLog(PageScrollerCG.class);
20
21 public static final int FORWARD = 0;
22 public static final int BACKWARD = 1;
23 public static final int FORWARD_BLOCK = 2;
24 public static final int BACKWARD_BLOCK = 3;
25 public static final int FIRST = 4;
26 public static final int LAST = 5;
27 private final static SIcon[][][] DEFAULT_ICONS = new SIcon[2][6][2];
28
29 static {
30 String [] postfixes = new String [6];
31 String [] prefixes = new String [6];
32 for (int orientation = 0; orientation < 2; orientation++) {
33 prefixes[BACKWARD] = "";
34 prefixes[FORWARD] = "";
35 prefixes[FIRST] = "Margin";
36 prefixes[LAST] = "Margin";
37 prefixes[FORWARD_BLOCK] = "Block";
38 prefixes[BACKWARD_BLOCK] = "Block";
39 if (orientation == SConstants.VERTICAL) {
40 postfixes[BACKWARD] = "Up";
41 postfixes[FORWARD] = "Down";
42 postfixes[FIRST] = "Up";
43 postfixes[LAST] = "Down";
44 postfixes[BACKWARD_BLOCK] = "Up";
45 postfixes[FORWARD_BLOCK] = "Down";
46 } else {
47 postfixes[BACKWARD] = "Left";
48 postfixes[FORWARD] = "Right";
49 postfixes[FIRST] = "Left";
50 postfixes[LAST] = "Right";
51 postfixes[BACKWARD_BLOCK] = "Left";
52 postfixes[FORWARD_BLOCK] = "Right";
53 }
54
55 for (int direction = 0; direction < postfixes.length; direction++) {
56 DEFAULT_ICONS[orientation][direction][0] =
57 new SResourceIcon("org/wings/icons/"
58 + prefixes[direction]
59 + "Scroll"
60 + postfixes[direction] + ".gif");
61 DEFAULT_ICONS[orientation][direction][1] =
62 new SResourceIcon("org/wings/icons/Disabled"
63 + prefixes[direction]
64 + "Scroll"
65 + postfixes[direction] + ".gif");
66 }
67 }
68 }
69
70 public void writeContent(Device d, SComponent c)
71 throws IOException {
72 log.debug("write = " + c);
73 SPageScroller sb = (SPageScroller) c;
74
75 if (sb.getLayoutMode() == SConstants.VERTICAL)
76 writeVerticalPageScroller(d, sb);
77 else
78 writeHorizontalPageScroller(d, sb);
79 }
80
81 private void writeVerticalPageScroller(Device d, SPageScroller sb) throws IOException {
82 int value = sb.getValue();
83 int extent = sb.getExtent();
84 int minimum = sb.getMinimum();
85 int maximum = sb.getMaximum();
86 boolean backEnabled = value > minimum;
87 boolean forwardEnabled = value < maximum - extent;
88
89 d.print("<table orientation=\"vertical\" class=\"SLayout\"><tbody>\n")
90 .print("<tr height=\"1%\">\n")
91 .print("<td height=\"1%\" class=\"SLayout\"><table area=\"buttons\" class=\"SLayout\"><tbody>\n");
92
93 d.print("<tr><td class=\"SLayout\">");
94 writeButton(d, sb, DEFAULT_ICONS[SConstants.VERTICAL][FIRST][0], "" + minimum);
95 d.print("</td></tr>\n");
96 d.print("<tr><td class=\"SLayout\">");
97 writeButton(d, sb, DEFAULT_ICONS[SConstants.VERTICAL][BACKWARD][0], "" + (value - extent));
98 d.print("</td></tr>\n");
99
100 d.print("</tbody></table></td>\n")
101 .print("</tr>\n")
102 .print("<tr height=\"100%\">\n")
103 .print("<td class=\"SLayout\"><table area=\"pages\" height=\"100%\" class=\"SLayout\"><tbody>\n");
104
105 int firstDirectPage = sb.getCurrentPage() - (sb.getDirectPages() - 1) / 2;
106 firstDirectPage = Math.min(firstDirectPage, sb.getPageCount() - sb.getDirectPages());
107 firstDirectPage = Math.max(firstDirectPage, 0);
108
109 for (int i = 0; i < Math.min(sb.getDirectPages(), sb.getPageCount() - firstDirectPage); i++) {
110 int page = firstDirectPage + i;
111 d.print("<tr><td class=\"SLayout\">");
112 writePage(d, sb, page);
113 d.print("</td></tr>\n");
114 }
115
116 d.print("</tbody></table></td>\n")
117 .print("</tr>\n")
118 .print("<tr height=\"1%\">\n")
119 .print("<td height=\"1%\" class=\"SLayout\"><table area=\"buttons\" class=\"SLayout\"><tbody>\n");
120
121 d.print("<tr><td class=\"SLayout\">");
122 writeButton(d, sb, DEFAULT_ICONS[SConstants.VERTICAL][FORWARD][0], "" + (value + extent));
123 d.print("</td></tr>\n");
124 d.print("<tr><td class=\"SLayout\">");
125 writeButton(d, sb, DEFAULT_ICONS[SConstants.VERTICAL][LAST][0], "" + (maximum + 1 - extent));
126 d.print("</td></tr>\n");
127
128 d.print("</tbody></table></td>\n")
129 .print("</tr>\n")
130 .print("</tbody></table>");
131 }
132
133 private void verticalArea(Device d, String s, int v) throws IOException {
134 d.print("<tr><td class=\"SLayout\" style=\"background-color: ");
135 d.print(s);
136 d.print("\" height=\"");
137 d.print(v + "%");
138 d.print("\"></td></tr>\n");
139 }
140
141 private void writeHorizontalPageScroller(Device d, SPageScroller sb) throws IOException {
142 int value = sb.getValue();
143 int extent = sb.getExtent();
144 int minimum = sb.getMinimum();
145 int maximum = sb.getMaximum();
146 boolean backEnabled = value > minimum;
147 boolean forwardEnabled = value < maximum - extent;
148
149 d.print("<table class=\"SLayout\" orientation=\"horizontal\"><tbody><tr>\n")
150 .print("<td class=\"SLayout\" width=\"1%\"><table area=\"buttons\"><tbody><tr>\n");
151
152 d.print("<td class=\"SLayout\">");
153 writeButton(d, sb, DEFAULT_ICONS[SConstants.HORIZONTAL][FIRST][0], "" + minimum);
154 d.print("</td>\n");
155 d.print("<td class=\"SLayout\">");
156 writeButton(d, sb, DEFAULT_ICONS[SConstants.HORIZONTAL][BACKWARD][0], "" + (value - extent));
157 d.print("</td>\n");
158
159 d.print("</tr></tbody></table></td>\n")
160 .print("<td class=\"SLayout\" width=\"100%\"><table area=\"pages\" width=\"100%\"><tbody><tr>\n");
161
162 int firstDirectPage = sb.getCurrentPage() - (sb.getDirectPages() - 1) / 2;
163 firstDirectPage = Math.min(firstDirectPage, sb.getPageCount() - sb.getDirectPages());
164 firstDirectPage = Math.max(firstDirectPage, 0);
165
166 for (int i = 0; i < Math.min(sb.getDirectPages(), sb.getPageCount() - firstDirectPage); i++) {
167 int page = firstDirectPage + i;
168 d.print("<td class=\"SLayout\">");
169 writePage(d, sb, page);
170 d.print("</td>\n");
171 }
172
173 d.print("</tr></tbody></table></td>\n")
174 .print("<td class=\"SLayout\" width=\"1%\"><table area=\"buttons\"><tbody><tr>\n");
175
176 d.print("<td class=\"SLayout\">");
177 writeButton(d, sb, DEFAULT_ICONS[SConstants.HORIZONTAL][FORWARD][0], "" + (value + extent));
178 d.print("</td>\n");
179 d.print("<td class=\"SLayout\">");
180 writeButton(d, sb, DEFAULT_ICONS[SConstants.HORIZONTAL][LAST][0], "" + (maximum + 1 - extent));
181 d.print("</td>\n");
182
183 d.print("</tr></tbody></table></td>\n")
184 .print("</tr></tbody></table>");
185 }
186
187 private void writePage(Device device, SPageScroller pageScroller, int page) throws IOException {
188 boolean childSelectorWorkaround = !pageScroller.getSession().getUserAgent().supportsCssChildSelector();
189 boolean showAsFormComponent = pageScroller.getShowAsFormComponent();
190
191 if (showAsFormComponent) {
192 writeButtonStart(device, pageScroller, String.valueOf(page * pageScroller.getExtent()));
193 device.print(" type=\"submit\" name=\"")
194 .print(Utils.event(pageScroller))
195 .print("\" value=\"")
196 .print(String.valueOf(page * pageScroller.getExtent()))
197 .print("\"");
198 } else {
199 device.print("<a HREF=\"")
200 .print(pageScroller.getRequestURL()
201 .addParameter(Utils.event(pageScroller) + "=" + page * pageScroller.getExtent()).toString())
202 .print("\"");
203 }
204 device.print(">");
205
206 device.print(Integer.toString(page + 1));
207
208 if (showAsFormComponent)
209 device.print("</button>\n");
210 else
211 device.print("</a>\n");
212 }
213
214 private void writeButton(Device device, SPageScroller pageScroller, SIcon icon, String event) throws IOException {
215 boolean childSelectorWorkaround = !pageScroller.getSession().getUserAgent().supportsCssChildSelector();
216 boolean showAsFormComponent = pageScroller.getShowAsFormComponent();
217
218 if (showAsFormComponent) {
219 writeButtonStart(device, pageScroller, event);
220 device.print(" type=\"submit\" name=\"")
221 .print(Utils.event(pageScroller))
222 .print("\" value=\"")
223 .print(event)
224 .print("\"");
225 } else {
226 device.print("<a HREF=\"")
227 .print(pageScroller.getRequestURL()
228 .addParameter(Utils.event(pageScroller) + "=" + event).toString())
229 .print("\"");
230 }
231 device.print(">");
232
233 device.print("<img");
234 Utils.optAttribute(device, "src", icon.getURL());
235 Utils.optAttribute(device, "width", icon.getIconWidth());
236 Utils.optAttribute(device, "height", icon.getIconHeight());
237 device.print(" alt=\"");
238 device.print(icon.getIconTitle());
239 device.print("\"/>");
240
241 if (showAsFormComponent)
242 device.print("</button>\n");
243 else
244 device.print("</a>\n");
245 }
246
247
250 protected void writeButtonStart(Device device, SPageScroller pageScroller, String event) throws IOException {
251 device.print("<button");
252 }
253 }
254 |
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