/usr/lib/Wt/examples/treeview/TreeViewExample.C is in witty-examples 3.3.0-1build1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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* Copyright (C) 2008 Emweb bvba, Kessel-Lo, Belgium.
*
* See the LICENSE file for terms of use.
*/
#include "TreeViewExample.h"
#include <iostream>
#include <boost/lexical_cast.hpp>
#include <Wt/WApplication>
#include <Wt/WContainerWidget>
#include <Wt/WEnvironment>
#include <Wt/WPanel>
#include <Wt/WPushButton>
#include <Wt/WStandardItem>
#include <Wt/WStandardItemModel>
#include <Wt/WText>
#include <Wt/WTreeView>
using namespace Wt;
static const char *weatherIcons[] = {
"sun01.png",
"cloudy01.png",
"w_cloud.png",
"rain.png",
"storm.png",
"snow.png"
};
TreeViewExample::TreeViewExample(WStandardItemModel *model,
const WString& titleText)
: model_(model)
{
belgium_ = model_->item(0, 0)->child(0, 0);
new WText(titleText, this);
/*
* Now create the view
*/
WPanel *panel = new WPanel(this);
panel->resize(600, 300);
panel->setCentralWidget(treeView_ = new WTreeView());
if (!WApplication::instance()->environment().ajax())
treeView_->resize(WLength::Auto, 290);
treeView_->setAlternatingRowColors(true);
treeView_->setRowHeight(25);
treeView_->setModel(model_);
treeView_->setColumnWidth(1, WLength(100));
treeView_->setColumnAlignment(1, AlignCenter);
treeView_->setColumnWidth(3, WLength(100));
treeView_->setColumnAlignment(3, AlignCenter);
treeView_->setRowHeaderCount(1);
treeView_->setColumnWidth(0, 300);
/*
* Expand the first (and single) top level node
*/
treeView_->setExpanded(model->index(0, 0), true);
treeView_->setExpanded(model->index(0, 0, model->index(0, 0)), true);
/*
* Setup some buttons to manipulate the view and the model.
*/
WContainerWidget *wc = new WContainerWidget(this);
WPushButton *b;
b = new WPushButton("Toggle row height", wc);
b->clicked().connect(this, &TreeViewExample::toggleRowHeight);
b->setToolTip("Toggles row height between 31px and 25px");
b = new WPushButton("Toggle stripes", wc);
b->clicked().connect(this, &TreeViewExample::toggleStripes);
b->setToolTip("Toggle alternating row colors");
b = new WPushButton("Toggle root", wc);
b->clicked().connect(this, &TreeViewExample::toggleRoot);
b->setToolTip("Toggles root item between all and the first continent.");
b = new WPushButton("Add rows", wc);
b->clicked().connect(this, &TreeViewExample::addRows);
b->setToolTip("Adds some cities to Belgium");
}
WStandardItemModel *TreeViewExample::createModel(bool useInternalPath,
WObject *parent)
{
/*
* Setup a model.
*
* We use the standard item model, which is a general model
* suitable for hierarchical (tree-like) data, but stores all data
* in memory.
*/
WStandardItemModel *result = new WStandardItemModel(0, 4, parent);
/*
* Headers ...
*/
result->setHeaderData(0, Horizontal, std::string("Places"));
result->setHeaderData(1, Horizontal, std::string("Weather"));
result->setHeaderData(2, Horizontal, std::string("Drink"));
result->setHeaderData(3, Horizontal, std::string("Visited"));
/*
* ... and data
*/
WStandardItem *continent, *country;
result->appendRow(continent = continentItem("Europe"));
continent->appendRow(country = countryItem("Belgium", "be"));
country->appendRow(cityItems("Brussels", Rain, "Beer", useInternalPath,
true));
country->appendRow(cityItems("Leuven", Rain, "Beer", useInternalPath, true));
continent->appendRow(country = countryItem("France", "fr"));
country->appendRow(cityItems("Paris", Cloud, "Wine", useInternalPath, true));
country->appendRow(cityItems("Bordeaux", SunCloud, "Bordeaux wine",
useInternalPath, false));
continent->appendRow(country = countryItem("Spain", "sp"));
country->appendRow(cityItems("Barcelona", Sun, "Cava", useInternalPath,
true));
country->appendRow(cityItems("Madrid", Sun, "San Miguel", useInternalPath,
false));
result->appendRow(continent = continentItem("Africa"));
continent->appendRow(country = countryItem("Morocco (المغرب)", "ma"));
country->appendRow(cityItems("Casablanca", Sun, "Tea", useInternalPath,
false));
return result;
}
WStandardItem *TreeViewExample::continentItem(const std::string& continent)
{
WStandardItem *result = new WStandardItem(continent);
result->setColumnCount(4);
return result;
}
WStandardItem *TreeViewExample::countryItem(const std::string& country,
const std::string& code)
{
WStandardItem *result = new WStandardItem(WString::fromUTF8(country));
result->setIcon("icons/flag_" + code + ".png");
return result;
}
std::vector<WStandardItem *>
TreeViewExample::cityItems(const std::string& city,
WeatherIcon weather,
const std::string& drink,
bool useInternalPath, bool visited)
{
std::vector<WStandardItem *> result;
WStandardItem *item;
// column 0: country
item = new WStandardItem(WString::fromUTF8(city));
result.push_back(item);
// column 1: weather
item = new WStandardItem();
item->setIcon(std::string("icons/") + weatherIcons[weather]);
result.push_back(item);
// column 2: drink
item = new WStandardItem(drink);
if (useInternalPath)
item->setLink(WLink(WLink::InternalPath, "/drinks/" + drink));
result.push_back(item);
// column 3: visited
item = new WStandardItem();
item->setCheckable(true);
item->setChecked(visited);
result.push_back(item);
return result;
}
void TreeViewExample::toggleRowHeight()
{
if (treeView_->rowHeight() == WLength(31))
treeView_->setRowHeight(25);
else
treeView_->setRowHeight(31);
}
void TreeViewExample::toggleStripes()
{
treeView_->setAlternatingRowColors(!treeView_->alternatingRowColors());
}
void TreeViewExample::toggleRoot()
{
if (treeView_->rootIndex() == WModelIndex())
treeView_->setRootIndex(model_->index(0, 0));
else
treeView_->setRootIndex(WModelIndex());
}
void TreeViewExample::addRows()
{
static int COUNT = 10;
for (int i = 0; i < COUNT; ++i) {
std::string cityName = "City "
+ boost::lexical_cast<std::string>(belgium_->rowCount() + 1);
bool useInternalPath = false;
belgium_->appendRow(cityItems(cityName, Storm, "Juice", useInternalPath,
false));
}
treeView_->scrollTo(belgium_->child(belgium_->rowCount() -COUNT )->index(),
WAbstractItemView::PositionAtTop);
}
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