qt window animations

Window animationsedit Delete Reprint 2015-10-10 14:50:27 Tags: qt gradient animation

An application typically contains multiple animations, for example, you might want to move many graphic items at the same time or move them in a serial way.

Qanimationgroup: The animation group parent class to contain other animations so that these animations can be triggered serially or in parallel

Qsequentialanimationgroup: string Action Painting

Qparallelanimationgroup: Parallel animations

Qpropertyanimation?: Animation class, the second parameter represents a window tree, can be size, windowopacity, gemotry, and so on

1. Fade in and fade out

The constructor writes the following code:?

1? animation =NewQpropertyanimation ( This,"windowopacity");2 3Animation->setduration ( the);//Total animation Time4 5Animation->setstartvalue (1);//Start Opaque6 7Animation->setendvalue (0);//transparent when in contact8 9Animation->seteasingcurve (qeasingcurve::linear);//Gradient Time CurveTen  OneConnect (animation, &qpropertyanimation::finished A  -, This, [ This]{close ();});?//end of animation close window

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The parameters of the Setstartvalue method and the Setendvalue method are based on the? propertyname parameter in the class constructor, which is the second argument

? Common methods:

Start: Start animation

Pause: Pausing an animation

Stop: Stop animation

Setkeyvalueat (qreal, const qvariant &), insert key data to the position specified in Parameter 1, the state of parameter 2 appears

? setcurrenttime (int): Sets the current animation time

Setdirection (Direction): Animation direction, Forward, backward

StateChanged (Qabstractanimation::state, qabstractanimation::state)?: Status Change Signal

2, the minimization of the gradual reduction?

Note: It should be used outside the window, not in the constructor

1Qpropertyanimation *minimumanimation =2 3 NewQpropertyanimation (Videowidget,"Geometry");4 5Minimumanimation->setduration ( $);6 7Minimumanimation->Setendvalue (8 9Qrect (Maptoglobal (POS ()). x () + Videocount * videowidget->width ()Ten  One, Maptoglobal (POS ()). Y (),0,0) A  - ); -  theMinimumanimation->start ();

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qt window animations