/*
Copyright (C) 2012, University of Cambridge, Department of Psychiatry.
Created by Rudolf Cardinal (rnc1001@cam.ac.uk).
This file is part of CamCOPS.
CamCOPS is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
CamCOPS is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with CamCOPS. If not, see <https://www.gnu.org/licenses/>.
*/
// #define DEBUG_DATA_FLOW
#include "bmi.h"
#include "common/textconst.h"
#include "lib/convert.h"
#include "maths/mathfunc.h"
#include "questionnairelib/commonoptions.h"
#include "questionnairelib/questionnaire.h"
#include "questionnairelib/quheight.h"
#include "questionnairelib/qumass.h"
#include "questionnairelib/qutext.h"
#include "questionnairelib/qutextedit.h"
#include "questionnairelib/quwaist.h"
#include "tasklib/taskfactory.h"
#include "tasklib/taskregistrar.h"
using convert::toDp;
using mathfunc::noneNull;
const QString Bmi::BMI_TABLENAME("bmi");
const QString FN_MASS_KG("mass_kg");
const QString FN_HEIGHT_M("height_m");
const QString FN_WAIST_CM("waist_cm");
const QString FN_COMMENT("comment");
// const int BMI_DP = 2;
void initializeBmi(TaskFactory& factory)
{
static TaskRegistrar<Bmi> registered(factory);
}
Bmi::Bmi(CamcopsApp& app, DatabaseManager& db, const int load_pk) :
Task(app, db, BMI_TABLENAME, false, false, false), // ... anon, clin, resp
m_questionnaire(nullptr)
{
addField(FN_MASS_KG, QMetaType::fromType<double>());
addField(FN_HEIGHT_M, QMetaType::fromType<double>());
addField(FN_WAIST_CM, QMetaType::fromType<double>());
addField(FN_COMMENT, QMetaType::fromType<QString>());
load(load_pk); // MUST ALWAYS CALL from derived Task constructor.
}
// ============================================================================
// Class info
// ============================================================================
QString Bmi::shortname() const
{
return "BMI";
}
QString Bmi::longname() const
{
return tr("Body mass index");
}
QString Bmi::description() const
{
return tr("Mass, height, BMI; also waist circumference.");
}
// ============================================================================
// Instance info
// ============================================================================
bool Bmi::isComplete() const
{
// Waist circumference optional
return noneNull(values({FN_MASS_KG, FN_HEIGHT_M}));
}
QStringList Bmi::summary() const
{
QStringList lines;
lines.append(QString("%1 kg, %2 m; BMI = %3 kg/m^2; %4.")
.arg(
prettyValue(FN_MASS_KG),
prettyValue(FN_HEIGHT_M),
bmiString(),
category()
));
if (!valueIsNullOrEmpty(FN_WAIST_CM)) {
lines.append(
QString("%1 %2 cm.")
.arg(tr("Waist circumference:"), prettyValue(FN_WAIST_CM))
);
}
if (!valueIsNullOrEmpty(FN_COMMENT)) {
lines.append(
QString("%1 %2").arg(tr("Comments:"), valueString(FN_COMMENT))
);
}
return lines;
}
QStringList Bmi::detail() const
{
return completenessInfo() + summary();
}
OpenableWidget* Bmi::editor(const bool read_only)
{
auto heading = [this](const QString& xstringname) -> QuElement* {
return (new QuText(xstring(xstringname)))->setBold(true);
};
auto height_units = new QuUnitSelector(CommonOptions::heightUnits());
auto height_edit = new QuHeight(fieldRef(FN_HEIGHT_M), height_units);
auto mass_units = new QuUnitSelector(CommonOptions::massUnits());
auto mass_edit = new QuMass(fieldRef(FN_MASS_KG), mass_units);
auto waist_units = new QuUnitSelector(CommonOptions::waistUnits());
auto waist_edit = new QuWaist(
fieldRef(FN_WAIST_CM),
waist_units,
false
); // Not mandatory
// Comments
FieldRefPtr fr_comment = fieldRef(FN_COMMENT, false);
QuPagePtr page(
(new QuPage{
// ---------------------------------------------------------------
// Height
// ---------------------------------------------------------------
heading("title_1"),
height_units,
heading("title_2"),
height_edit,
// ---------------------------------------------------------------
// Mass
// ---------------------------------------------------------------
heading("title_3"),
mass_units,
heading("title_4"),
mass_edit,
// ---------------------------------------------------------------
// Waist circumference
// ---------------------------------------------------------------
new QuText(xstring("optional")),
heading("title_5"),
waist_units,
heading("title_6"),
waist_edit,
// ---------------------------------------------------------------
// Comments
// ---------------------------------------------------------------
(new QuText(TextConst::comments()))->setBold(true),
new QuTextEdit(fr_comment),
})
->setTitle(longname())
);
m_questionnaire = new Questionnaire(m_app, {page});
m_questionnaire->setType(QuPage::PageType::Clinician);
m_questionnaire->setReadOnly(read_only);
return m_questionnaire;
}
// ============================================================================
// Task-specific calculations
// ============================================================================
QVariant Bmi::bmiVariant() const
{
if (!isCompleteCached()) {
return QVariant();
}
const double mass_kg = valueDouble(FN_MASS_KG);
const double height_m = valueDouble(FN_HEIGHT_M);
if (abs(height_m) < 0.0001) {
// It is possible that a platform may not handle division by zero. We
// could also limit height to a sensible range. It's probably better to
// allow a patient to skip this task altogether rather than end up with
// silly small height values.
return QVariant();
}
const double bmi = mass_kg / (height_m * height_m);
return QVariant(bmi);
}
QString Bmi::bmiString(const int dp) const
{
const QVariant bmi = bmiVariant();
if (bmi.isNull()) {
return "?";
}
return toDp(bmi.toDouble(), dp);
}
QString Bmi::category() const
{
const QVariant bmiv = bmiVariant();
if (bmiv.isNull()) {
return "?";
}
const double bmi = bmiv.toDouble();
if (bmi >= 40) {
return xstring("obese_3");
}
if (bmi >= 35) {
return xstring("obese_2");
}
if (bmi >= 30) {
return xstring("obese_1");
}
if (bmi >= 25) {
return xstring("overweight");
}
if (bmi >= 18.5) {
return xstring("normal");
}
if (bmi >= 17.5) {
return xstring("underweight_17.5_18.5");
}
if (bmi >= 17) {
return xstring("underweight_17_17.5");
}
if (bmi >= 16) {
return xstring("underweight_16_17");
}
if (bmi >= 15) {
return xstring("underweight_15_16");
}
if (bmi >= 13) {
return xstring("underweight_13_15");
}
return xstring("underweight_under_13");
}