Qt 实现窗口大小过渡动画demo

#include "AnimationResizeWidget.h" #include <QtCore/QEventLoop> AnimationResizeWidget::AnimationResizeWidget(QWidget *parent) { setAttribute(Qt::WA_StyledBackground); m_pAnimation = new QPropertyAnimation(this); m_pAnimation->setEasingCurve(QEasingCurve::Linear); m_pAnimation->setTargetObject(this); m_pAnimation->setPropertyName("animSize"); connect(m_pAnimation, &QPropertyAnimation::valueChanged, [this](){ emit animSizeChanged(); }); setDuration(200); } AnimationResizeWidget::~AnimationResizeWidget() { delete m_pAnimation; } void AnimationResizeWidget::setDuration(int msecs) { m_pAnimation->setDuration(msecs); } const int AnimationResizeWidget::duration() const { return m_pAnimation->duration(); } QSize AnimationResizeWidget::animSize() const { return size(); } void AnimationResizeWidget::setAnimSize(QSize size) { setFixedSize(size); } void AnimationResizeWidget::setStartSize(const QSize &size) { m_pAnimation->setStartValue(size); } QSize AnimationResizeWidget::startSize() const { return m_pAnimation->startValue().toSize(); } void AnimationResizeWidget::setEndSize(const QSize &size) { m_pAnimation->setEndValue(size); } QSize AnimationResizeWidget::endSize() const { return m_pAnimation->endValue().toSize(); } void AnimationResizeWidget::run() { if(m_pAnimation->startValue() == m_pAnimation->endValue()) return; QEventLoop loop; connect(m_pAnimation, &QAbstractAnimation::finished, [&](){ loop.quit(); }); emit animStarted(); m_pAnimation->start(); loop.exec(); m_pAnimation->disconnect(m_pAnimation, &QAbstractAnimation::finished, nullptr, nullptr); emit animFinished(); }