poco/WebWidgets/src/ListBoxCell.cpp

//
// ListBoxCell.cpp
//
// $Id: //poco/Main/WebWidgets/src/ListBoxCell.cpp#2 $
//
// Library: WebWidgets
// Package: Controls
// Module:  ListBoxCell
//
// Copyright (c) 2007, Applied Informatics Software Engineering GmbH.
// and Contributors.
//
// Permission is hereby granted, free of charge, to any person or organization
// obtaining a copy of the software and accompanying documentation covered by
// this license (the "Software") to use, reproduce, display, distribute,
// execute, and transmit the Software, and to prepare derivative works of the
// Software, and to permit third-parties to whom the Software is furnished to
// do so, all subject to the following:
// 
// The copyright notices in the Software and this entire statement, including
// the above license grant, this restriction and the following disclaimer,
// must be included in all copies of the Software, in whole or in part, and
// all derivative works of the Software, unless such copies or derivative
// works are solely in the form of machine-executable object code generated by
// a source language processor.
// 
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT
// SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE
// FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE,
// ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
// DEALINGS IN THE SOFTWARE.
//


#include "Poco/WebWidgets/ListBoxCell.h"
#include "Poco/WebWidgets/RequestHandler.h"
#include "Poco/DateTime.h"
#include "Poco/StringTokenizer.h"
#include "Poco/NumberParser.h"


namespace Poco {
namespace WebWidgets {


const std::string ListBoxCell::EV_LOADDATA("load");
const std::string ListBoxCell::EV_AFTERLOAD("afterLoad");
const std::string ListBoxCell::EV_SELECTIONCHANGED("selChange");
const std::string ListBoxCell::ARG_ROW("row");


ListBoxCell::ListBoxCell(View* pOwner):
	Cell(pOwner, typeid(ListBoxCell)),
	_data(),
	_fmtCache(),
	_autoScroll(true)
{
}


ListBoxCell::ListBoxCell(View* pOwner, const std::type_info& type):
	Cell(pOwner, type),
	_data(),
	_fmtCache(),
	_autoScroll(true)
{
}


ListBoxCell::~ListBoxCell()
{
}


void ListBoxCell::handleForm(const std::string& field, const std::string& value)
{
	// a ListBox inside a form will just send the selected values
	// may contain multiple values like "field: 1,3"
	// a deselectAll() would be wrong event wise
	Poco::StringTokenizer tok(value, ", []", Poco::StringTokenizer::TOK_IGNORE_EMPTY | Poco::StringTokenizer::TOK_TRIM);
	std::set<int> selected;
	for (Poco::StringTokenizer::Iterator it = tok.begin(); it != tok.end(); ++it)
	{
		int val(-1);
		bool ok = Poco::NumberParser::tryParse(*it, val);
		if (ok)
			selected.insert(val);
	}
	for (int i = 0; i < _data.size(); ++i)
	{
		if (selected.find(i) != selected.end())
			selectByIndex(i);
		else
			deselectByIndex(i);
	}

	selectionChanged(this, selected);
}


ListBoxCell::Data::iterator ListBoxCell::find(const Any& elem)
{
	Data::iterator it = begin();
	Formatter::Ptr ptr=getFormatter();
	std::string elemStr(ptr->format(elem));
	std::size_t pos(0);
	while (it != end())
	{
		if (elemStr == _fmtCache[pos])
		{
			return it;
		}
		++it;
		++pos;
	}

	return it;
}


ListBoxCell::Data::const_iterator ListBoxCell::find(const Any& elem) const
{
	Data::const_iterator it = begin();
	Formatter::Ptr ptr=getFormatter();
	std::string elemStr(ptr->format(elem));
	std::size_t pos(0);
	while (it != end())
	{
		if (elemStr == _fmtCache[pos])
		{
			return it;
		}
		++it;
		++pos;
	}

	return it;
}


void ListBoxCell::setElements(const Data& elems)
{
	clearElements();
	_data = elems;
	Formatter::Ptr ptr = getFormatter();
	Data::iterator it = _data.begin();
	for (; it != _data.end(); ++it)
		_fmtCache.push_back(ptr->format(it->first));
}


void ListBoxCell::erase(const Any& elem)
{
	Data::iterator it = find(elem);
	if (it != _data.end())
		_data.erase(it);
}


void ListBoxCell::select(const Any& elem)
{
	Data::iterator it = find(elem);
	if (it != _data.end())
	{
		if (it->second != true)
		{
			it->second = true;
			int idx = static_cast<int>(it - _data.begin());
			rowSelected(this, idx);
		}
	}
}


void ListBoxCell::deselect(const Any& elem)
{
	Data::iterator it = find(elem);
	if (it != _data.end())
	{
		if (it->second != false)
		{
			it->second = false;
			int idx = static_cast<int>(it - _data.begin());
			rowDeselected(this, idx);
		}
	}
}


bool ListBoxCell::hasSelected() const
{
	Data::const_iterator it = _data.begin();
	for (; it != _data.end(); ++it)
		if (it->second) return true;
	return false;
}


const Any& ListBoxCell::getSelected() const
{
	Data::const_iterator it = _data.begin();
	for (; it != _data.end(); ++it)
		if (it->second) return it->first;

	throw Poco::NotFoundException("No element selected");
}


bool ListBoxCell::serializeJSON(std::ostream& out, const std::string& name)
{
	out << name << ":";
	Data::const_iterator it = _data.begin();
	bool written = false;
	for (std::size_t i = 0; i < _data.size(); ++i)
	{
		if (_data[i].second)
		{
			if (written)
				out << ",";
			else
				written = true;
			out << i;
		}
	}
	if (!written)
		out << "''";

	return true;
}


void ListBoxCell::selectByIndex(int idx, bool sel)
{
	if (idx >= 0 && idx < _data.size())
	{
		if (_data[idx].second != sel)
		{
			_data[idx].second = sel;
			if (sel)
				rowSelected(this, idx);
			else
				rowDeselected(this, idx);
		}
	}
}


void ListBoxCell::selectAll(bool sel)
{
	Data::iterator it = _data.begin();
	for (; it != _data.end(); ++it)
		it->second = sel;
}


void ListBoxCell::handleAjaxRequest(const Poco::Net::NameValueCollection& args, Poco::Net::HTTPServerResponse& response)
{
	const std::string& ev = args[RequestHandler::KEY_EVID];
	if (ev == EV_LOADDATA)
	{
		Poco::Net::HTTPServerResponse* pResp = &response;
		std::pair<ListBoxCell*, Poco::Net::HTTPServerResponse*> data = std::make_pair(this, pResp);
		beforeLoad(this, data);
	}
	else if (ev == EV_AFTERLOAD)
	{
		afterLoad(this);
		response.send();
	}
	else if (ev == EV_SELECTIONCHANGED)
	{
		handleForm("", args[ARG_ROW]);
		response.send();
	}
	else
		response.send();
}

} } // namespace Poco::WebWidgets