57 lines
1.4 KiB
C++
57 lines
1.4 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 Widgets {
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/*!
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* \class Widgets::ClearComboBox
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* \brief A QComboBox with an embedded button for clearing its contents.
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*/
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/*!
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* \brief Constructs a clear combo box.
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*/
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ClearComboBox::ClearComboBox(QWidget *parent) :
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QComboBox(parent),
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ButtonOverlay(this)
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{
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const QMargins margins = contentsMargins();
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QStyleOptionComboBox opt;
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opt.initFrom(this);
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const int frameWidth = style()->pixelMetric(QStyle::PM_ComboBoxFrameWidth, &opt, this);
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const int pad = 2;
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const int buttonWidth = style()->subControlRect(QStyle::CC_ComboBox, &opt, QStyle::SC_ComboBoxArrow, this).width();
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buttonLayout()->setContentsMargins(margins.left() + frameWidth + pad, margins.top() + frameWidth, margins.right() + frameWidth + pad + buttonWidth, margins.bottom() + frameWidth);
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setClearButtonEnabled(isEditable());
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connect(this, &ClearComboBox::currentTextChanged, this, &ClearComboBox::handleTextChanged);
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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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* \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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bool ClearComboBox::isCleared() const
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{
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return currentText().isEmpty();
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}
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}
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