如何設置Qt QStateMachine動畫持續時間

Question

我在學習Qt框架。我的QStateMachine代碼執行正確的操作（按下按鈕使聊天窗口彈出更改大小）。 我無法改變動畫的速度以獲得漂亮的視覺過渡。 有什麼建議嗎？

下面的代碼：

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

代碼

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

應該

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

的動畫是被應用到錯誤的部件。