|
1
15 package org.apache.tapestry.contrib.tree.components;
16
17 import java.util.Iterator  ;
18
19 import org.apache.tapestry.BaseComponent;
20 import org.apache.tapestry.IMarkupWriter;
21 import org.apache.tapestry.IRequestCycle;
22 import org.apache.tapestry.contrib.tree.model.ITreeDataModel;
23 import org.apache.tapestry.contrib.tree.model.ITreeModel;
24 import org.apache.tapestry.contrib.tree.model.ITreeRowSource;
25 import org.apache.tapestry.contrib.tree.model.TreeRowObject;
26
27
30 public abstract class TreeDataView extends BaseComponent implements ITreeRowSource
31 {
32 private TreeRowObject m_objTreeRowObject = null;
33
34 private int m_nTreeDeep = -1;
35
36 public TreeDataView()
37 {
38 super();
39 initialize();
40 }
41
42 public void initialize()
43 {
44 m_objTreeRowObject = null;
45 m_nTreeDeep = -1;
46 }
47
48 public abstract TreeView getTreeView();
49
50 public void renderComponent(IMarkupWriter writer, IRequestCycle cycle)
51 {
52 Object objExistedTreeModelSource = cycle
54 .getAttribute(ITreeRowSource.TREE_ROW_SOURCE_ATTRIBUTE);
55 cycle.setAttribute(ITreeRowSource.TREE_ROW_SOURCE_ATTRIBUTE, this);
56
57 TreeView objView = getTreeView();
58 ITreeModel objTreeModel = objView.getTreeModel();
59 ITreeDataModel objTreeDataModel = objTreeModel.getTreeDataModel();
60
61 Object objRoot = objTreeDataModel.getRoot();
62 Object objRootUID = objTreeDataModel.getUniqueKey(objRoot, null);
63 if (getShowRootNode())
64 {
65 walkTree(
66 objRoot,
67 objRootUID,
68 0,
69 objTreeModel,
70 writer,
71 cycle,
72 TreeRowObject.FIRST_LAST_ROW,
73 new int[0],
74 true);
75 }
76 else
77 {
78 boolean bFirst = true;
79 int nChildenCount = objTreeModel.getTreeDataModel().getChildCount(objRoot);
80 int nRowPossiotionType = nChildenCount == 1 ? TreeRowObject.FIRST_LAST_ROW
81 : TreeRowObject.FIRST_ROW;
82 for (Iterator iter = objTreeModel.getTreeDataModel().getChildren(objRoot); iter
83 .hasNext();)
84 {
85 Object objChild = iter.next();
86 Object objChildUID = objTreeModel.getTreeDataModel()
87 .getUniqueKey(objChild, objRoot);
88 boolean bChildLast = !iter.hasNext();
89 if (!bFirst)
90 {
91 if (bChildLast)
92 nRowPossiotionType = TreeRowObject.LAST_ROW;
93 else
94 nRowPossiotionType = TreeRowObject.MIDDLE_ROW;
95 }
96
97 walkTree(
98 objChild,
99 objChildUID,
100 0,
101 objTreeModel,
102 writer,
103 cycle,
104 nRowPossiotionType,
105 new int[0],
106 bChildLast);
107
108 bFirst = false;
109 }
110 }
111
112 cycle.setAttribute(ITreeRowSource.TREE_ROW_SOURCE_ATTRIBUTE, objExistedTreeModelSource);
113 }
114
115 public void walkTree(Object objParent, Object objParentUID, int nDepth,
116 ITreeModel objTreeModel, IMarkupWriter writer, IRequestCycle cycle,
117 int nRowPossiotionType, int[] arrConnectImages, boolean bLast)
118 {
119 m_nTreeDeep = nDepth;
120 int nNumberOfChildren = objTreeModel.getTreeDataModel().getChildCount(objParent);
121 boolean bLeaf = (nNumberOfChildren == 0) ? true : false;
122 m_objTreeRowObject = new TreeRowObject(objParent, objParentUID, nDepth, bLeaf,
123 nRowPossiotionType, arrConnectImages);
124
125 super.renderComponent(writer, cycle);
126
127 boolean bContain = objTreeModel.getTreeStateModel().isUniqueKeyExpanded(objParentUID);
128 if (bContain)
129 {
130 int[] arrConnectImagesNew = new int[arrConnectImages.length + 1];
131 System.arraycopy(arrConnectImages, 0, arrConnectImagesNew, 0, arrConnectImages.length);
132 if (bLast)
133 arrConnectImagesNew[arrConnectImagesNew.length - 1] = TreeRowObject.EMPTY_CONN_IMG;
134 else
135 arrConnectImagesNew[arrConnectImagesNew.length - 1] = TreeRowObject.LINE_CONN_IMG;
136
137 for (Iterator iter = objTreeModel.getTreeDataModel().getChildren(objParent); iter
138 .hasNext();)
139 {
140 Object objChild = iter.next();
141 Object objChildUID = objTreeModel.getTreeDataModel().getUniqueKey(
142 objChild,
143 objParentUID);
144 boolean bChildLast = !iter.hasNext();
145 if (bChildLast)
146 nRowPossiotionType = TreeRowObject.LAST_ROW;
147 else
148 nRowPossiotionType = TreeRowObject.MIDDLE_ROW;
149 walkTree(
150 objChild,
151 objChildUID,
152 nDepth + 1,
153 objTreeModel,
154 writer,
155 cycle,
156 nRowPossiotionType,
157 arrConnectImagesNew,
158 bChildLast);
159 }
160 }
161 }
162
163 public int getTreeDeep()
164 {
165 return m_nTreeDeep;
166 }
167
168
171 public TreeRowObject getTreeRow()
172 {
173 return getTreeRowObject();
174 }
175
176 public TreeRowObject getTreeRowObject()
177 {
178 return m_objTreeRowObject;
179 }
180
181 public void setTreeRowObject(TreeRowObject object)
182 {
183 m_objTreeRowObject = object;
184 }
185
186 public abstract boolean getShowRootNode();
187
188 } |
Popular Tags |
Java API By Example, From Geeks To Geeks.