77 lines
2.1 KiB
C++
77 lines
2.1 KiB
C++
#include "./clearplaintextedit.h"
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#include <QHBoxLayout>
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#include <QScrollBar>
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#include <QStyle>
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#include <QStyleOptionFrame>
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using namespace std;
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namespace QtUtilities {
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/*!
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* \class ClearPlainTextEdit
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* \brief A QPlainTextEdit with an embedded button for clearing its contents.
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*/
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/*!
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* \brief Constructs a clear plain text edit.
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*/
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ClearPlainTextEdit::ClearPlainTextEdit(QWidget *parent)
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: QPlainTextEdit(parent)
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, ButtonOverlay(viewport())
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{
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handleCustomLayoutCreated();
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ButtonOverlay::setClearButtonEnabled(true);
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}
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/*!
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* \brief Destroys the clear plain text edit.
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*/
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ClearPlainTextEdit::~ClearPlainTextEdit()
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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 ClearPlainTextEdit::handleTextChanged()
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{
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updateClearButtonVisibility(!document()->isEmpty());
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}
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void ClearPlainTextEdit::handleClearButtonClicked()
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{
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// do no call clear() here to prevent clearing of undo history
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QTextCursor cursor(document());
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cursor.select(QTextCursor::Document);
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cursor.removeSelectedText();
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}
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void ClearPlainTextEdit::handleCustomLayoutCreated()
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{
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// set alignment to show buttons in the bottom right corner
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ButtonOverlay::buttonLayout()->setAlignment(Qt::AlignBottom | Qt::AlignRight);
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const QStyle *const s = style();
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QStyleOptionFrame opt;
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opt.initFrom(this);
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setContentsMarginsFromEditFieldRectAndFrameWidth(s->subElementRect(QStyle::SE_FrameContents, &opt, this),
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s->pixelMetric(QStyle::PM_DefaultFrameWidth, &opt, m_widget), s->pixelMetric(QStyle::PM_LayoutVerticalSpacing, &opt, m_widget));
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connect(this, &QPlainTextEdit::textChanged, this, &ClearPlainTextEdit::handleTextChanged);
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// ensure button layout is realigned when scrolling
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connect(verticalScrollBar(), &QScrollBar::actionTriggered, this, &ClearPlainTextEdit::handleScroll);
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connect(this, &QPlainTextEdit::cursorPositionChanged, this, &ClearPlainTextEdit::handleScroll);
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}
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void ClearPlainTextEdit::handleScroll()
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{
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buttonLayout()->update();
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}
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bool ClearPlainTextEdit::isCleared() const
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{
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return document()->isEmpty();
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}
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} // namespace QtUtilities
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