Wt examples  3.3.0
TreeNode.C
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1 /*
2  * Copyright (C) 2008 Emweb bvba, Kessel-Lo, Belgium.
3  *
4  * See the LICENSE file for terms of use.
5  */
6 #include <boost/lexical_cast.hpp>
7 
8 #include <Wt/WTable>
9 #include <Wt/WTableCell>
10 #include <Wt/WImage>
11 #include <Wt/WText>
12 #include <Wt/WCssDecorationStyle>
13 
14 #include "TreeNode.h"
15 #include "IconPair.h"
16 
17 using std::find;
18 
19 std::string TreeNode::imageLine_[] = { "icons/line-middle.gif",
20  "icons/line-last.gif" };
21 std::string TreeNode::imagePlus_[] = { "icons/nav-plus-line-middle.gif",
22  "icons/nav-plus-line-last.gif" };
23 std::string TreeNode::imageMin_[] = { "icons/nav-minus-line-middle.gif",
24  "icons/nav-minus-line-last.gif" };
25 
26 TreeNode::TreeNode(const std::string labelText,
27  Wt::TextFormat labelFormat,
28  IconPair *labelIcon,
29  Wt::WContainerWidget *parent)
30  : Wt::WCompositeWidget(parent),
31  parentNode_(0),
32  labelIcon_(labelIcon)
33 {
34  // pre-learned stateless implementations ...
35  implementStateless(&TreeNode::expand, &TreeNode::undoExpand);
36  implementStateless(&TreeNode::collapse, &TreeNode::undoCollapse);
37 
38  // ... or auto-learned stateless implementations
39  // which do not need undo functions
40  //implementStateless(&TreeNode::expand);
41  //implementStateless(&TreeNode::collapse);
42 
43  setImplementation(layout_ = new Wt::WTable());
44 
46  expandIcon_->hide();
47  noExpandIcon_ = new Wt::WImage(imageLine_[Last]);
48 
50  expandedContent_->hide();
51 
52  labelText_ = new Wt::WText(labelText);
53  labelText_->setTextFormat(labelFormat);
54  labelText_->setStyleClass("treenodelabel");
57  childCountLabel_->setStyleClass("treenodechildcount");
58 
59  layout_->elementAt(0, 0)->addWidget(expandIcon_);
60  layout_->elementAt(0, 0)->addWidget(noExpandIcon_);
61 
62  if (labelIcon_) {
63  layout_->elementAt(0, 1)->addWidget(labelIcon_);
65  }
66  layout_->elementAt(0, 1)->addWidget(labelText_);
67  layout_->elementAt(0, 1)->addWidget(childCountLabel_);
68 
69  layout_->elementAt(1, 1)->addWidget(expandedContent_);
70 
71  layout_->elementAt(0, 0)->setContentAlignment(Wt::AlignTop);
72  layout_->elementAt(0, 1)->setContentAlignment(Wt::AlignMiddle);
73 
76 } //
77 
79 {
80  if (parentNode_) {
81  return parentNode_->childNodes_.back() == this;
82  } else
83  return true;
84 }
85 
87 {
88  childNodes_.push_back(node);
89  node->parentNode_ = this;
90 
91  expandedContent_->addWidget(node);
92 
94 }
95 
97 {
98  childNodes_.erase(std::find(childNodes_.begin(), childNodes_.end(), node));
99 
100  node->parentNode_ = 0;
101 
102  expandedContent_->removeWidget(node);
103 
105 } //
106 
108 {
109  for (unsigned i = 0; i < childNodes_.size(); ++i)
111 
113 
114  if (childNodes_.size())
116  ->setText("(" + boost::lexical_cast<std::string>(childNodes_.size())
117  + ")");
118  else
119  childCountLabel_->setText("");
120 
121  resetLearnedSlots();
122 } //
123 
125 {
127 
128  expandIcon_->setState(0);
129  expandedContent_->hide();
130  if (labelIcon_)
131  labelIcon_->setState(0);
132 } //
133 
135 {
137 
138  expandIcon_->setState(1);
139  expandedContent_->show();
140  if (labelIcon_)
141  labelIcon_->setState(1);
142 
143  /*
144  * collapse all children
145  */
146  for (unsigned i = 0; i < childNodes_.size(); ++i)
147  childNodes_[i]->collapse();
148 } //
149 
151 {
152  if (!wasCollapsed_) {
153  // re-expand
154  expandIcon_->setState(1);
155  expandedContent_->show();
156  if (labelIcon_)
157  labelIcon_->setState(1);
158  }
159 }
160 
162 {
163  if (wasCollapsed_) {
164  // re-collapse
165  expandIcon_->setState(0);
166  expandedContent_->hide();
167  if (labelIcon_)
168  labelIcon_->setState(0);
169  }
170 
171  /*
172  * undo collapse of children
173  */
174  for (unsigned i = 0; i < childNodes_.size(); ++i)
175  childNodes_[i]->undoCollapse();
176 } //
177 
179 {
180  ImageIndex index = isLastChildNode() ? Last : Middle;
181 
182  if (expandIcon_->icon1()->imageLink().url() != imagePlus_[index])
184  if (expandIcon_->icon2()->imageLink().url() != imageMin_[index])
186  if (noExpandIcon_->imageLink().url() != imageLine_[index])
188 
189  if (index == Last) {
190  layout_->elementAt(0, 0)
192  layout_->elementAt(1, 0)
194  } else {
195  layout_->elementAt(0, 0)
196  ->decorationStyle().setBackgroundImage("icons/line-trunk.gif",
198  layout_->elementAt(1, 0)
199  ->decorationStyle().setBackgroundImage("icons/line-trunk.gif",
201  } //
202 
203  if (childNodes_.empty()) {
204  if (noExpandIcon_->isHidden()) {
205  noExpandIcon_->show();
206  expandIcon_->hide();
207  }
208  } else {
209  if (expandIcon_->isHidden()) {
210  noExpandIcon_->hide();
211  expandIcon_->show();
212  }
213  }
214 } //

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