Qt自绘控件之-IOS风格开关按钮

#include "SwitchButton.h" SwitchButton::SwitchButton(QWidget *parent) : QWidget(parent) , m_bChecked(false) , m_bShowText(true) { this->setMinimumSize(30, 20); QFont font; font.setFamily("Consolas"); font.setPointSize(15); this->setFont(font); m_timeLine.setDuration(200); m_timeLine.setUpdateInterval(10); m_timeLine.setCurveShape(QTimeLine::LinearCurve); connect(&m_timeLine, &QTimeLine::valueChanged, this, [=](qreal value) { m_curPos.setX((m_onPos.x() - m_offPos.x()) * value + m_offPos.x()); m_curPos.setY((m_onPos.y() - m_offPos.y()) * value + m_offPos.y()); update(); }); } SwitchButton::~SwitchButton() { } QSize SwitchButton::sizeHint() const { return QSize(60, 30); } void SwitchButton::resizeEvent(QResizeEvent *event) { QRect rect; rect.setWidth(this->geometry().width() - 1); rect.setHeight(this->geometry().height() - 1); int radius = rect.height() / 2.0; m_onPos.setX(rect.width() - radius); m_onPos.setY(rect.height() * 0.5); m_offPos.setX(radius); m_offPos.setY(rect.height() * 0.5); if (m_bChecked) { m_curPos = m_onPos; } else { m_curPos = m_offPos; } } void SwitchButton::paintEvent(QPaintEvent *event) { QPainter painter(this); painter.setRenderHint(QPainter::Antialiasing); QRect rect; rect.setWidth(this->geometry().width() - 1); rect.setHeight(this->geometry().height() - 1); int radius = rect.height() / 2.0; painter.setPen(Qt::NoPen); if (m_bChecked) { painter.setBrush(QBrush(QColor(0, 255, 0))); } else { painter.setBrush(QBrush(QColor(200, 200, 200))); } painter.drawEllipse(QPoint(radius, rect.height() * 0.5), radius, radius); painter.drawEllipse(QPoint(rect.width() - radius, rect.height() * 0.5), radius, radius); painter.drawRect(radius, 0, rect.width() - radius * 2, rect.height()); if (m_bShowText) { painter.setPen(QPen(QColor(255, 255, 255))); if (m_bChecked) { painter.drawText(QRect(0, 0, rect.width() * 0.5, rect.height()), "ON", QTextOption(Qt::AlignHCenter | Qt::AlignVCenter)); } else { painter.drawText(QRect(rect.width() * 0.5, 0, rect.width() * 0.5, rect.height()), "OFF", QTextOption(Qt::AlignHCenter | Qt::AlignVCenter)); } } painter.setPen(Qt::NoPen); painter.setBrush(QBrush(QColor(255, 255, 255))); if (m_bChecked) { int circleRadius = radius - 3; painter.drawEllipse(m_curPos, circleRadius, circleRadius); } else { int circleRadius = radius - 3; painter.drawEllipse(m_curPos, circleRadius, circleRadius); } } void SwitchButton::mousePressEvent(QMouseEvent *event) { } void SwitchButton::mouseMoveEvent(QMouseEvent *event) { } void SwitchButton::mouseReleaseEvent(QMouseEvent *event) { if (m_timeLine.state() != QTimeLine::Running) { m_bChecked = !m_bChecked; if (m_bChecked) { m_timeLine.setDirection(QTimeLine::Forward); m_timeLine.start(); } else { m_timeLine.setDirection(QTimeLine::Backward); m_timeLine.start(); } } }