68 lines
1.5 KiB
C++
68 lines
1.5 KiB
C++
#include "./clearcombobox.h"
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#include <QHBoxLayout>
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#include <QStyle>
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#include <QStyleOptionComboBox>
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namespace QtUtilities {
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/*!
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* \class ClearComboBox
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* \brief A QComboBox with an embedded button for clearing its contents.
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*/
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/// \cond
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static inline auto *getComboBoxLineEdit(QComboBox *comboBox)
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{
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comboBox->setEditable(true);
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return comboBox->lineEdit();
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}
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/// \endcond
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/*!
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* \brief Constructs a clear combo box.
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* \remarks The combo box is initialized to be editable and which must not be changed.
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*/
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ClearComboBox::ClearComboBox(QWidget *parent)
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: QComboBox(parent)
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, ButtonOverlay(this, getComboBoxLineEdit(this))
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{
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ButtonOverlay::setClearButtonEnabled(true);
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}
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/*!
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* \brief Destroys the clear combo box.
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*/
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ClearComboBox::~ClearComboBox()
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{
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}
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/*!
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* \brief Updates the visibility of the clear button.
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*/
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void ClearComboBox::handleTextChanged(const QString &text)
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{
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updateClearButtonVisibility(!text.isEmpty());
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}
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void ClearComboBox::handleClearButtonClicked()
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{
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clearEditText();
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}
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void ClearComboBox::handleCustomLayoutCreated()
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{
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const QStyle *const s = style();
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QStyleOptionComboBox opt;
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opt.initFrom(this);
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setContentsMarginsFromEditFieldRectAndFrameWidth(
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s->subControlRect(QStyle::CC_ComboBox, &opt, QStyle::SC_ComboBoxEditField, this), s->pixelMetric(QStyle::PM_ComboBoxFrameWidth, &opt, this));
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connect(this, &ClearComboBox::currentTextChanged, this, &ClearComboBox::handleTextChanged);
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}
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bool ClearComboBox::isCleared() const
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{
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return currentText().isEmpty();
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}
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} // namespace QtUtilities
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