QSlider滑块点击时在滑块上显示当前值 （二）

#include "CustomSlider.h" CustomSlider::CustomSlider(QWidget * parent) : QSlider(parent) , m_parentWidget(parent) , m_sliderDisplayLabel(NULL) { } CustomSlider::~CustomSlider() { } void CustomSlider::setBeginTimeLabel(QTime beginTime) { m_beginTime = beginTime; } void CustomSlider::setEndTimeLabel(QTime endTime) { m_endTime = endTime; } void CustomSlider::updateInterval() { m_interval = m_beginTime.secsTo(m_endTime)/(maximum()-minimum()); } void CustomSlider::mousePressEvent(QMouseEvent *ev) { if (!m_sliderDisplayLabel) { updateInterval(); m_sliderDisplayLabel = new QLabel(this); m_sliderDisplayLabel->setWindowFlags(Qt::Dialog); m_sliderDisplayLabel->setWindowFlags(Qt::Dialog|Qt::FramelessWindowHint); m_sliderDisplayLabel->setAttribute(Qt::WA_TranslucentBackground); m_sliderDisplayLabel->setText(m_beginTime.addSecs(sliderPosition()*m_interval).toString("hh:mm:ss")); m_sliderDisplayLabel->move(m_parentWidget->mapToGlobal(pos()).x()+sliderPosition()*(frameGeometry().width()-11)/(maximum()-minimum())-19,m_parentWidget->mapToGlobal(pos()).y()-12); m_sliderDisplayLabel->setVisible(true); } return QSlider::mousePressEvent(ev); } void CustomSlider::mouseReleaseEvent(QMouseEvent *ev) { if (m_sliderDisplayLabel) { delete m_sliderDisplayLabel; m_sliderDisplayLabel = NULL; } return QSlider::mouseReleaseEvent(ev); } void CustomSlider::mouseMoveEvent(QMouseEvent *ev) { if (m_sliderDisplayLabel) { m_sliderDisplayLabel->setText(m_beginTime.addSecs(sliderPosition()*m_interval).toString("hh:mm:ss")); m_sliderDisplayLabel->move(m_parentWidget->mapToGlobal(pos()).x()+sliderPosition()*(frameGeometry().width()-11)/(maximum()-minimum())-19,m_parentWidget->mapToGlobal(pos()).y()-12); m_sliderDisplayLabel->setVisible(true); } return QSlider::mouseMoveEvent(ev); }