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/*
* Copyright (C) 2008 Emweb bvba, Kessel-Lo, Belgium.
*
* See the LICENSE file for terms of use.
*/
#include <boost/lexical_cast.hpp>
#include <Wt/WTable>
#include <Wt/WTableCell>
#include <Wt/WImage>
#include <Wt/WText>
#include <Wt/WCssDecorationStyle>
#include "TreeNode.h"
#include "IconPair.h"
using std::find;
std::string TreeNode::imageLine_[] = { "icons/line-middle.gif",
"icons/line-last.gif" };
std::string TreeNode::imagePlus_[] = { "icons/nav-plus-line-middle.gif",
"icons/nav-plus-line-last.gif" };
std::string TreeNode::imageMin_[] = { "icons/nav-minus-line-middle.gif",
"icons/nav-minus-line-last.gif" };
TreeNode::TreeNode(const std::string labelText,
Wt::TextFormat labelFormat,
IconPair *labelIcon,
Wt::WContainerWidget *parent)
: Wt::WCompositeWidget(parent),
parentNode_(0),
labelIcon_(labelIcon)
{
// pre-learned stateless implementations ...
implementStateless(&TreeNode::expand, &TreeNode::undoExpand);
implementStateless(&TreeNode::collapse, &TreeNode::undoCollapse);
// ... or auto-learned stateless implementations
// which do not need undo functions
//implementStateless(&TreeNode::expand);
//implementStateless(&TreeNode::collapse);
setImplementation(layout_ = new Wt::WTable());
expandIcon_ = new IconPair(imagePlus_[Last], imageMin_[Last]);
expandIcon_->hide();
noExpandIcon_ = new Wt::WImage(imageLine_[Last]);
expandedContent_ = new Wt::WContainerWidget();
expandedContent_->hide();
labelText_ = new Wt::WText(labelText);
labelText_->setTextFormat(labelFormat);
labelText_->setStyleClass("treenodelabel");
childCountLabel_ = new Wt::WText();
childCountLabel_->setMargin(7, Wt::Left);
childCountLabel_->setStyleClass("treenodechildcount");
layout_->elementAt(0, 0)->addWidget(expandIcon_);
layout_->elementAt(0, 0)->addWidget(noExpandIcon_);
if (labelIcon_) {
layout_->elementAt(0, 1)->addWidget(labelIcon_);
labelIcon_->setVerticalAlignment(Wt::AlignMiddle);
}
layout_->elementAt(0, 1)->addWidget(labelText_);
layout_->elementAt(0, 1)->addWidget(childCountLabel_);
layout_->elementAt(1, 1)->addWidget(expandedContent_);
layout_->elementAt(0, 0)->setContentAlignment(Wt::AlignTop);
layout_->elementAt(0, 1)->setContentAlignment(Wt::AlignMiddle);
expandIcon_->icon1Clicked.connect(SLOT(this, TreeNode::expand));
expandIcon_->icon2Clicked.connect(SLOT(this, TreeNode::collapse));
} //
bool TreeNode::isLastChildNode() const
{
if (parentNode_) {
return parentNode_->childNodes_.back() == this;
} else
return true;
}
void TreeNode::addChildNode(TreeNode *node)
{
childNodes_.push_back(node);
node->parentNode_ = this;
expandedContent_->addWidget(node);
childNodesChanged();
}
void TreeNode::removeChildNode(TreeNode *node)
{
childNodes_.erase(std::find(childNodes_.begin(), childNodes_.end(), node));
node->parentNode_ = 0;
expandedContent_->removeWidget(node);
childNodesChanged();
} //
void TreeNode::childNodesChanged()
{
for (unsigned i = 0; i < childNodes_.size(); ++i)
childNodes_[i]->adjustExpandIcon();
adjustExpandIcon();
if (childNodes_.size())
childCountLabel_
->setText("(" + boost::lexical_cast<std::string>(childNodes_.size())
+ ")");
else
childCountLabel_->setText("");
resetLearnedSlots();
} //
void TreeNode::collapse()
{
wasCollapsed_ = expandedContent_->isHidden();
expandIcon_->setState(0);
expandedContent_->hide();
if (labelIcon_)
labelIcon_->setState(0);
} //
void TreeNode::expand()
{
wasCollapsed_ = expandedContent_->isHidden();
expandIcon_->setState(1);
expandedContent_->show();
if (labelIcon_)
labelIcon_->setState(1);
/*
* collapse all children
*/
for (unsigned i = 0; i < childNodes_.size(); ++i)
childNodes_[i]->collapse();
} //
void TreeNode::undoCollapse()
{
if (!wasCollapsed_) {
// re-expand
expandIcon_->setState(1);
expandedContent_->show();
if (labelIcon_)
labelIcon_->setState(1);
}
}
void TreeNode::undoExpand()
{
if (wasCollapsed_) {
// re-collapse
expandIcon_->setState(0);
expandedContent_->hide();
if (labelIcon_)
labelIcon_->setState(0);
}
/*
* undo collapse of children
*/
for (unsigned i = 0; i < childNodes_.size(); ++i)
childNodes_[i]->undoCollapse();
} //
void TreeNode::adjustExpandIcon()
{
ImageIndex index = isLastChildNode() ? Last : Middle;
if (expandIcon_->icon1()->imageRef() != imagePlus_[index])
expandIcon_->icon1()->setImageRef(imagePlus_[index]);
if (expandIcon_->icon2()->imageRef() != imageMin_[index])
expandIcon_->icon2()->setImageRef(imageMin_[index]);
if (noExpandIcon_->imageRef() != imageLine_[index])
noExpandIcon_->setImageRef(imageLine_[index]);
if (index == Last) {
layout_->elementAt(0, 0)
->decorationStyle().setBackgroundImage("");
layout_->elementAt(1, 0)
->decorationStyle().setBackgroundImage("");
} else {
layout_->elementAt(0, 0)
->decorationStyle().setBackgroundImage("icons/line-trunk.gif",
Wt::WCssDecorationStyle::RepeatY);
layout_->elementAt(1, 0)
->decorationStyle().setBackgroundImage("icons/line-trunk.gif",
Wt::WCssDecorationStyle::RepeatY);
} //
if (childNodes_.empty()) {
if (noExpandIcon_->isHidden()) {
noExpandIcon_->show();
expandIcon_->hide();
}
} else {
if (expandIcon_->isHidden()) {
noExpandIcon_->hide();
expandIcon_->show();
}
}
} //
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