运行qproperties和imation后qwiget的怪异行为

我正在两个小部件上运行下一个动画:

QParallelAnimationGroup* animGroup = new QParallelAnimationGroup;

for (int i = 0; i < 2; ++i) {
    //widgets is an array of 2 QLabels
    QPropertyAnimation* anim = new QPropertyAnimation(widgets[i], "geometry");
    anim->setDuration(750);
    anim->setStartValue(widgets[i]->geometry());
    widgets[i]->setProperty("animating", true);
    qDebug() << QString("Animation Start %1: ").arg(widgets[i]->objectName()) << widgets[i]->pos() << " g " << widgets[i]->geometry();
    //
    anim->setEndValue(widgets[!i]->geometry());
    anim->setEasingCurve(QEasingCurve::OutBack);
    animGroup->addAnimation(anim);
}

animGroup->start(QAbstractAnimation::DeleteWhenStopped);

到目前为止,动画可以按预期移动两个窗口小部件,但是一旦我调整窗口的大小,这些窗口小部件就会自动移回原来的位置。包含这两个小部件的当前布局是QHBox布局,并具有以下项(顺序相同):

qLabel0 | qspaceritem0 qtooltip按钮qspaceritem1| Qabel1

动画之后,它们变成:

Qabel1 | qspaceritem0 qtooltip按钮qspaceritem1| qLabel0

但是每当我更改窗口的大小时,小部件上的位置都会重置为原始布局。我还没有从窗口实现ResizeEvent。

我使用Visual StudioQueVisualStudioTooal2.3.1和Qt 12的Windows 10,用MSVC201764版本和C++ 17启用。

完成测试代码(新项目):

swapietemstest.cpp不锈钢

#include "SwapItemsTest.h"

#include <array>

#include <QHBoxLayout>
#include <QToolButton>
#include <QSpacerItem>
#include <QLabel>
#include <QDebug>
#include <QParallelAnimationGroup>
#include <QPropertyAnimation>
#include <QTimer>

SwapItemsTest::SwapItemsTest(QWidget *parent)
    : QMainWindow(parent)
{
    ui.setupUi(this);

    auto layout = new QHBoxLayout;

    auto toolButton = new QToolButton;

    auto left = new QLabel("Left");
    left->setFixedSize(50, size().height());
    left->setFrameShape(QFrame::Box);
    left->setFrameShadow(QFrame::Plain);
    left->setLineWidth(2);

    left->setAlignment(Qt::AlignCenter);

    auto right = new QLabel("Right");

    right->setFixedSize(50, size().height());
    right->setAlignment(Qt::AlignCenter);
    right->setFrameShape(QFrame::Box);
    right->setFrameShadow(QFrame::Plain);
    right->setLineWidth(2);

    layout->addWidget(left);

    layout->addSpacerItem(new QSpacerItem(40, 40));

    layout->addWidget(toolButton);

    layout->addSpacerItem(new QSpacerItem(40, 40));

    layout->addWidget(right);

    ui.centralWidget->setLayout(layout);

    auto widgets = std::array{left, right};

    connect(toolButton, &QToolButton::clicked, [widgets]() {
        QParallelAnimationGroup* animGroup = new QParallelAnimationGroup;

        for (int i = 0; i < 2; ++i) {
            //widgets is an array of 2 QLabels
            QPropertyAnimation* anim = new QPropertyAnimation(widgets[i], "geometry");
            anim->setDuration(750);
            anim->setStartValue(widgets[i]->geometry());
            widgets[i]->setProperty("animating", true);
            anim->setEndValue(widgets[!i]->geometry());
            anim->setEasingCurve(QEasingCurve::OutBack);
            animGroup->addAnimation(anim);
        }

        animGroup->start(QAbstractAnimation::DeleteWhenStopped); 
    });


}

最快的

#pragma once

#include <QtWidgets/QMainWindow>
#include "ui_SwapItemsTest.h"

class SwapItemsTest : public QMainWindow
{
    Q_OBJECT

public:
    SwapItemsTest(QWidget *parent = Q_NULLPTR);

private:
    Ui::SwapItemsTestClass ui;
};