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// ************************************************************************************************
//
// BornAgain: simulate and fit reflection and scattering
//
//! @file GUI/View/Info/CautionSign.cpp
//! @brief Implements class CautionSign.
//!
//! @homepage http://www.bornagainproject.org
//! @license GNU General Public License v3 or higher (see COPYING)
//! @copyright Forschungszentrum Jülich GmbH 2018
//! @authors Scientific Computing Group at MLZ (see CITATION, AUTHORS)
//
// ************************************************************************************************
#include "GUI/View/Info/CautionSign.h"
#include "Base/Util/Assert.h"
#include "GUI/View/Info/CautionSignWidget.h"
#include <QAbstractScrollArea>
#include <QEvent>
#include <QScrollBar>
#include <QTimer>
namespace {
const int xpos_offset = 40;
const int ypos_offset = 40;
} // namespace
CautionSign::CautionSign(QWidget* parent)
: QObject(parent)
, m_caution_widget(nullptr)
, m_area(nullptr)
, m_clear_just_had_happened(false)
{
setArea(parent);
}
//! Clears caution message;
void CautionSign::clear()
{
delete m_caution_widget;
m_caution_widget = nullptr;
m_caution_message.clear();
m_clear_just_had_happened = true;
QTimer::singleShot(10, this, [this] { m_clear_just_had_happened = false; });
}
//! Shows caution sign on the screen. If clear of previous caution sign had happened just
//! few msec ago, make a small delay, to stress its reapearance.
void CautionSign::setCautionMessage(const QString& cautionMessage)
{
ASSERT(m_area);
if (m_clear_just_had_happened) {
m_clear_just_had_happened = false;
QTimer::singleShot(50, this, [this, cautionMessage] { setCautionMessage(cautionMessage); });
} else {
m_caution_message = cautionMessage;
if (!m_caution_widget)
m_caution_widget = new CautionSignWidget(m_area);
m_caution_widget->setCautionMessage(m_caution_message);
updateLabelGeometry();
m_caution_widget->show();
}
}
void CautionSign::setArea(QWidget* area)
{
m_area = area;
m_area->installEventFilter(this);
}
bool CautionSign::eventFilter(QObject* obj, QEvent* event)
{
if (event->type() == QEvent::Resize)
updateLabelGeometry();
return QObject::eventFilter(obj, event);
}
void CautionSign::updateLabelGeometry()
{
if (!m_caution_widget || !m_area)
return;
QPoint pos = positionForCautionSign();
m_caution_widget->setPosition(pos.x(), pos.y());
}
QPoint CautionSign::positionForCautionSign() const
{
ASSERT(m_area);
int x = m_area->width() - xpos_offset;
int y = m_area->height() - ypos_offset;
if (auto* scrollArea = dynamic_cast<QAbstractScrollArea*>(m_area)) {
if (QScrollBar* horizontal = scrollArea->horizontalScrollBar()) {
if (horizontal->isVisible())
y -= horizontal->height();
}
if (QScrollBar* vertical = scrollArea->verticalScrollBar()) {
if (vertical->isVisible())
x -= vertical->width();
}
}
return {x, y};
}
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