An error occurs when using animation effects.

[IknowQT]

An error occurs when using animation effects.

• Error Message
  QPropertyAnimation: you're trying to animate a non-existing property AnmOuterBoundary of your QObject

Q_OBJECT
		Q_PROPERTY(qreal AnmFrameAlpha READ AnmFrameAlpha WRITE SetAnmFrameAlpha)

public:
	qreal	AnmFrameAlpha() const;
public slots:
	void SetAnmFrameAlpha(qreal rAlpha);

qreal usrCntrListItem::AnmFrameAlpha() const
{
	return this->windowOpacity();
}
void usrCntrListItem::SetAnmFrameAlpha(qreal rAlpha)
{
	this->setWindowOpacity(rAlpha);
	this->update();
}

void usrCntrListItem::SetCheckVisible(bool bShow)
{
	//this->ui.frame->setVisible(bShow);
	this->ui.chk_Enable->setVisible(bShow);

	auto anim = new QPropertyAnimation(this->ui.frame, "AnmFrameAlpha", this);
	anim->setDuration(1500);
	//anim->setStartValue(bShow ? 1.0 : 0.0);
	//anim->setEndValue(!bShow ? 1.0 : 0.0);
	anim->setStartValue(bShow ? 0.0 : 1.0);
	anim->setEndValue(bShow ? 1.0 : 0.0);
	anim->start();		
}

[jsulm]

@IknowQT said in An error occurs when using animation effects.:

auto anim = new QPropertyAnimation(this->ui.frame, "AnmFrameAlpha", this);

This can't work: AnmFrameAlpha is a property of your usrCntrListItem class, not frame.
Should be:

auto anim =  new QPropertyAnimation(this, "AnmFrameAlpha", this);

[Pl45m4]

@IknowQT

It says that you dont have AnmOuterBoundary property. The weird thing is, that the property name in your animation is correct.
I've noticed that your proptery name and your property READ have the exact same name... Could be the issue here.
(Edit: Is possible)

Since it seems like your are trying to animate the opacity, you could also do it this way:

• https://stackoverflow.com/a/32985126

Maybe it works for you.

Edit:

Another thought: Have you done a clean & rebuild and re-run qmake / cmake already?
If there was a property with the name, the error msg states, there could be some junk temp files from former builds laying around.

[jsulm]

@IknowQT said in An error occurs when using animation effects.:

you're trying to animate a non-existing property AnmOuterBoundary of your QObject

Do you have another animation trying to animate AnmOuterBoundary property?
In the code you posted you only have property AnmFrameAlpha.

[IknowQT]

@jsulm

Although I did not capture well, an error message is displayed even if I change to AnyFrame Alpha.

[jsulm]

@IknowQT said in An error occurs when using animation effects.:

an error message

Would be nice to see it...

[IknowQT]

@jsulm

QPropertyAnimation: you're trying to animate a non-existing property AnmFrameAlpha of your QObject

void usrCntrListItem::SetCheckVisible(bool bShow)
{
	if (bShow)
	{
		QSize s = this->ui.frame->size();

		auto anim =  new QPropertyAnimation(this->ui.frame, "AnmFrameAlpha", this);
		anim->setDuration(1500);
		anim->setStartValue(0.0);
		anim->setEndValue(1.0);
		anim->start(QAbstractAnimation::DeleteWhenStopped);
	}
	else
	{
		auto anim = new QPropertyAnimation(this->ui.frame, "AnmFrameAlpha", this);
		anim->setDuration(500);
		anim->setStartValue(1.0);
		anim->setEndValue(0.0);
		anim->start(QAbstractAnimation::DeleteWhenStopped);		
	}
}

qreal usrCntrListItem::AnmFrameAlpha() const
{
	return this->windowOpacity();
}

void usrCntrListItem::SetAnmFrameAlpha(qreal rAlpha)
{
	this->setWindowOpacity(rAlpha);
	this->update();
}

## Header
	Q_OBJECT
		Q_PROPERTY(qreal AnmFrameAlpha READ AnmFrameAlpha WRITE SetAnmFrameAlpha)
public:
qreal	AnmFrameAlpha() const;

public slots:
	void SetAnmFrameAlpha(qreal rAlpha);

[jsulm]

@IknowQT said in An error occurs when using animation effects.:

auto anim = new QPropertyAnimation(this->ui.frame, "AnmFrameAlpha", this);

This can't work: AnmFrameAlpha is a property of your usrCntrListItem class, not frame.
Should be:

auto anim =  new QPropertyAnimation(this, "AnmFrameAlpha", this);

[IknowQT]

@jsulm

Does this mean that the custom class that inherits Qframe class should apply it?

[Pl45m4]

@IknowQT

He wrote the solution.

You need to assign the property to the item you want to animate.

What do you really want to animate? Your frame or this , where the property is (the userListItem)?

[jsulm]

@IknowQT said in An error occurs when using animation effects.:

Does this mean that the custom class that inherits Qframe class should apply it?

Yes, because this property is a property of that custom class. There is no such property in QFrame, so how should it work?