如何设置Qt QStateMachine动画持续时间

Question

我正在尝试学习Qt框架。 我的QStateMachine代码可完成正确的操作（按此按钮可使聊天窗口弹出窗口更改大小）。 我无法更改动画的速度来获得良好的视觉过渡。 有什么建议么？

这是代码：

MainWindow::MainWindow()
{
   widget.setupUi( this );

   // chat window - Chat button opens
   ChatWindowClosedState = new QState();
   ChatWindowOpenState = new QState();

   ChatWindowOpenGeometry = widget.groupBox->geometry();
   ChatWindowClosedGeometry = widget.pushButton->geometry();
   ChatWindowClosedGeometry.translate( -ChatWindowClosedGeometry.width(), 0 );

   ChatWindowClosedState->assignProperty( widget.groupBox, "geometry", ChatWindowClosedGeometry );
   ChatWindowOpenState->assignProperty( widget.groupBox, "geometry", ChatWindowOpenGeometry );

   ChatWindowCloseTransition = ChatWindowClosedState->addTransition( widget.pushButton, SIGNAL( clicked() ), ChatWindowOpenState );
   ChatWindowCloseAnimation = new QPropertyAnimation( widget.pushButton, "geometry" );
   ChatWindowCloseAnimation->setDuration( 5000 );
   ChatWindowCloseTransition->addAnimation( ChatWindowCloseAnimation );

   ChatWindowOpenTransition = ChatWindowOpenState->addTransition( widget.pushButton, SIGNAL( clicked() ), ChatWindowClosedState );
   ChatWindowOpenAnimation = new QPropertyAnimation( widget.pushButton, "geometry" );
   ChatWindowOpenAnimation->setDuration( 5000 );
   ChatWindowOpenTransition->addAnimation( ChatWindowOpenAnimation );

   machine = new QStateMachine( this );
   machine->addState( ChatWindowClosedState );
   machine->addState( ChatWindowOpenState );
   machine->setInitialState( ChatWindowClosedState );
   machine->start();
}

Answer 1

编码

ChatWindowOpenAnimation = new QPropertyAnimation( widget.pushButton, "geometry" );

应该

ChatWindowOpenAnimation = new QPropertyAnimation( widget.groupBox, "geometry" );

动画被应用于错误的小部件。