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// ************************************************************************************************
//
// BornAgain: simulate and fit reflection and scattering
//
//! @file GUI/View/Info/OverlayLabelController.cpp
//! @brief Implements class OverlayLabelController.
//!
//! @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/OverlayLabelController.h"
#include "Base/Util/Assert.h"
#include "GUI/View/Info/OverlayLabelWidget.h"
#include <QEvent>
OverlayLabelController::OverlayLabelController(QObject* parent)
: QObject(parent)
, m_label(nullptr)
, m_area(nullptr)
{
}
void OverlayLabelController::setText(const QString& text)
{
m_text = text;
}
void OverlayLabelController::setArea(QAbstractScrollArea* area)
{
m_area = area;
m_area->installEventFilter(this);
}
//! Shows/removes a label from the controlled widget
void OverlayLabelController::setShown(bool shown)
{
if (shown) {
ASSERT(m_area);
if (!m_label) {
m_label = new OverlayLabelWidget(m_area);
m_label->setText(m_text);
updateLabelGeometry();
m_label->show();
}
} else {
delete m_label;
m_label = nullptr;
}
}
bool OverlayLabelController::eventFilter(QObject* obj, QEvent* event)
{
if (event->type() == QEvent::Resize)
updateLabelGeometry();
return QObject::eventFilter(obj, event);
}
void OverlayLabelController::updateLabelGeometry()
{
if (!m_label || !m_area)
return;
m_label->setRectangle(QRect(0, 0, m_area->width(), m_area->height()));
m_label->setPosition(0, 0);
}
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