[FIXED] What property supported in QPropertyAnimation to be animated?

Issue

I am learning Qt and think animating button things are important. I am trying to create my custom QPushButton class which reimplement mouse enter & leave event and use qt animation framework. QPropertyAnimation

QPropertyAnimation(QObject * target, const QByteArray & propertyName, QObject * parent = 0)

So if i want to animate its size, i can use "geometry" as propertyName but it confuses me when i wanna change both text color and background color too... what should i put as propertyName? been searching anywhere but didn't find any documentations about what property i could animate and how it is named in propertyName constructor argument.

Expected answer would be all possible parameter Like "geometry" in QtCore.QPropertyAnimation(self,"geometry") (pyqt4/pyside)

I use PyQt4 but I can use PySide & Qt4.8 C++ too so answer in any of those libraries will be okay (gonna learn them all)

Edit:

I found this one using "color" and it changes whole pushbutton color (background color), still don't know how to get text visible & animate the text-color

Solution

Text color and background color are not Qt properties. So you can't animate them using QPropertyAnimation.

You can find the list of QWidget properties in the appropriate section of the official documentation: http://doc.qt.io/qt-4.8/qwidget.html

If you want to dynamically change some arbitrary attributes like text color, you can launch a QTimer and perform necessary operations in a slot connected to the timer timeout signal.

---

--upd--

In C++ Qt you can't animate 'color' property because there is no such property. If you try to do it, you'll get the following warning in the console:

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

---

As a subclass of QVariantAnimation, QPropertyAnimation does not support all QVariant property types. Supported types are listed in the doc:

Not all QVariant types are supported. Below is a list of currently supported QVariant types:

Int
UInt
Double
Float
QLine
QLineF
QPoint
QPointF
QSize
QSizeF
QRect
QRectF
QColor

If you want to animate a property of some other type, you should register an interpolator function for it:

QVariant cursorInterpolator(const QCursor &start, const QCursor &end, qreal progress)
{
    ...
    return QCursor(...);
}
...
qRegisterAnimationInterpolator<QCursor>(cursorInterpolator);

Answered By - hank