QML实现文件十六进制显示Demo

#include "qhexview.h" #include "document/buffer/qmemorybuffer.h" #include <QFontDatabase> #include <QApplication> #include <QPaintEvent> #include <QHelpEvent> #include <QScrollBar> #include <QPainter> #include <QToolTip> #include <cmath> #include <QThread> #include <QDebug> #define CURSOR_BLINK_INTERVAL 500 // ms 光标闪烁时间 #define DOCUMENT_WHEEL_LINES 3 QHexView::QHexView(QWidget *parent) : QAbstractScrollArea(parent), m_document(nullptr), m_renderer(nullptr), m_readonly(false) { // QFont f = QFontDatabase::systemFont(QFontDatabase::FixedFont); // if(f.styleHint() != QFont::TypeWriter) // { // f.setFamily("Monospace"); // Force Monospaced font // f.setStyleHint(QFont::TypeWriter); // } // this->setFont(f); // setFont(QFont("Monospace")); auto font =QFont(QString::fromLocal8Bit("新宋体")); font.setPixelSize(12); setFont(font); this->setFocusPolicy(Qt::StrongFocus); this->setMouseTracking(true); this->verticalScrollBar()->setSingleStep(10); this->verticalScrollBar()->setPageStep(10); m_blinktimer = new QTimer(this); m_blinktimer->setInterval(CURSOR_BLINK_INTERVAL); connect(m_blinktimer, &QTimer::timeout, this, &QHexView::blinkCursor); this->setDocument(QHexDocument::fromMemory<QMemoryBuffer>(QByteArray(), this)); } QHexDocument *QHexView::document() { return m_document; } void QHexView::setDocument(QHexDocument *document) { if(m_renderer) m_renderer->deleteLater(); if(m_document) m_document->deleteLater(); m_document = document; m_renderer = new QHexRenderer(m_document, this->fontMetrics(), this); connect(m_document, &QHexDocument::documentChanged, this, [&]() { this->adjustScrollBars(); this->viewport()->update(); }); connect(m_document->cursor(), &QHexCursor::positionChanged, this, &QHexView::moveToSelection); connect(m_document->cursor(), &QHexCursor::insertionModeChanged, this, &QHexView::renderCurrentLine); this->adjustScrollBars(); this->viewport()->update(); } void QHexView::setReadOnly(bool b) { m_readonly = b; if(m_document) m_document->cursor()->setInsertionMode(QHexCursor::OverwriteMode); } void QHexView::adjustScrollBarValue(quint64 line) { QScrollBar *vscrollbar = this->verticalScrollBar(); int sizeFactor = this->documentSizeFactor(); quint64 docLines = m_renderer->documentLines(); if(line < docLines){ vscrollbar->setValue(line/sizeFactor); } } void QHexView::alignmentHead(bool head) { QScrollBar *vscrollbar = this->verticalScrollBar(); if(head){ vscrollbar->setValue(0); } else{ vscrollbar->setValue(vscrollbar->maximum()); } } void QHexView::setTheme(bool darkTheme) { m_isDarkTheme = darkTheme; if(m_renderer){ m_renderer->setTheme(darkTheme); } update(); } void QHexView::setHexLineWidth(quint8 value) { if(m_document){ m_document->setHexLineWidth(value); update(); } } bool QHexView::event(QEvent *e) { if(m_renderer && (e->type() == QEvent::FontChange)) { m_renderer->updateMetrics(QFontMetricsF(this->font())); return true; } if(m_document && m_renderer && (e->type() == QEvent::ToolTip)) { QHelpEvent* helpevent = static_cast<QHelpEvent*>(e); QHexPosition position; QPoint abspos = absolutePosition(helpevent->pos()); if(m_renderer->hitTest(abspos, &position, this->firstVisibleLine())) { QString comments = m_document->metadata()->comments(position.line, position.column); if(!comments.isEmpty()) QToolTip::showText(helpevent->globalPos(), comments, this); } return true; } return QAbstractScrollArea::event(e); } void QHexView::keyPressEvent(QKeyEvent *e) { if(!m_renderer || !m_document) { QAbstractScrollArea::keyPressEvent(e); return; } QHexCursor* cur = m_document->cursor(); m_blinktimer->stop(); m_renderer->enableCursor(); bool handled = this->processMove(cur, e); if(!handled) handled = this->processAction(cur, e); if(!handled) handled = this->processTextInput(cur, e); if(!handled) QAbstractScrollArea::keyPressEvent(e); // m_blinktimer->start(); } QPoint QHexView::absolutePosition(const QPoint & pos) const { QPoint shift(horizontalScrollBar()->value(), 0); return pos + shift; } void QHexView::mousePressEvent(QMouseEvent *e) { QAbstractScrollArea::mousePressEvent(e); if(!m_renderer || (e->buttons() != Qt::LeftButton)) return; /*** * 按钮点击 */ auto rect1 = QRect(m_renderer->getAsciiX()+ 1,5,14,14); auto rect2 = QRect(m_renderer->getAsciiEnd() - 1 - 14,5,14,14); if(rect1.contains(e->pos())){ m_bHeadIconPressed = true; } if(rect2.contains(e->pos())){ m_bBottomIconPressed = true; } QHexPosition position; QPoint abspos = absolutePosition(e->pos()); if(!m_renderer->hitTest(abspos, &position, this->firstVisibleLine())) return; m_renderer->selectArea(abspos); if(m_renderer->editableArea(m_renderer->selectedArea())) m_document->cursor()->moveTo(position); //点击的时候清除选中背景 add by lyy auto data = m_document->metadata(); data->clear(); e->accept(); } void QHexView::mouseMoveEvent(QMouseEvent *e) { QAbstractScrollArea::mouseMoveEvent(e); if(!m_renderer || !m_document) return; QPoint abspos = absolutePosition(e->pos()); if(e->buttons() == Qt::LeftButton) { if(m_blinktimer->isActive()) { m_blinktimer->stop(); m_renderer->enableCursor(false); } QHexCursor* cursor = m_document->cursor(); QHexPosition position; if(!m_renderer->hitTest(abspos, &position, this->firstVisibleLine())) return; cursor->select(position.line, position.column, 0); e->accept(); } if(e->buttons() != Qt::NoButton) return; int hittest = m_renderer->hitTestArea(abspos); if(m_renderer->editableArea(hittest)) this->setCursor(Qt::IBeamCursor); else this->setCursor(Qt::ArrowCursor); } void QHexView::mouseReleaseEvent(QMouseEvent *e) { QAbstractScrollArea::mouseReleaseEvent(e); /*** * 按钮点击 */ auto rect1 = QRect(m_renderer->getAsciiX()+ 1,5,14,14); auto rect2 = QRect(m_renderer->getAsciiEnd() - 1 - 14,5,14,14); if(rect1.contains(e->pos()) && m_bHeadIconPressed){ alignmentHead(true); } if(rect2.contains(e->pos()) && m_bBottomIconPressed){ alignmentHead(false); } m_bHeadIconPressed = false; m_bBottomIconPressed = false; if(e->button() != Qt::LeftButton) return; // if(!m_blinktimer->isActive()) m_blinktimer->start(); e->accept(); } void QHexView::focusInEvent(QFocusEvent *e) { QAbstractScrollArea::focusInEvent(e); if(!m_renderer) return; m_renderer->enableCursor(); // m_blinktimer->start(); } void QHexView::focusOutEvent(QFocusEvent *e) { QAbstractScrollArea::focusOutEvent(e); if(!m_renderer) return; m_blinktimer->stop(); m_renderer->enableCursor(false); } void QHexView::wheelEvent(QWheelEvent *e) { if(e->angleDelta().y() == 0) { int value = this->verticalScrollBar()->value(); if(e->angleDelta().x() < 0) // Scroll Down this->verticalScrollBar()->setValue(value + DOCUMENT_WHEEL_LINES); else if(e->angleDelta().x() > 0) // Scroll Up this->verticalScrollBar()->setValue(value - DOCUMENT_WHEEL_LINES); return; }