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大家，我尝试缩放按钮的大小，代码工作正常，如果我只单击一次，但如果我连续单击多次按钮，按钮无法返回其原始大小。这是代码：

 private void ButtonSearchMedication_OnClick(object sender, RoutedEventArgs e)
    {


            //Assign variation of width in term of begin, end and duration
        DoubleAnimation widthAnimation  =new DoubleAnimation(ButtonSearchMedication.ActualWidth, ButtonSearchMedication.ActualWidth*0.8, new Duration(timeSpan:TimeSpan.FromSeconds(0.2)) );

        //Assign variation of height in term of begin, end and duration
        DoubleAnimation heightAnimation = new DoubleAnimation(ButtonSearchMedication.ActualHeight,ButtonSearchMedication.ActualHeight*0.8, new Duration(timeSpan:TimeSpan.FromSeconds(0.2)));

        //Assign properties to button
        ButtonSearchMedication.BeginAnimation(Button.WidthProperty,widthAnimation);
        ButtonSearchMedication.BeginAnimation(Button.HeightProperty,heightAnimation);
    }

私人无效ButtonSearchMedication_OnMouseLeave（对象发送者，MouseEventArgs e）{

            DoubleAnimation widthAnimation = new DoubleAnimation(ButtonSearchMedication.ActualWidth, ButtonSearchMedication.ActualWidth*1.25,new Duration(timeSpan:TimeSpan.FromSeconds(0.2)));
            DoubleAnimation heightAnimation = new DoubleAnimation(ButtonSearchMedication.ActualHeight, ButtonSearchMedication.ActualHeight*1.25,new Duration(timeSpan:TimeSpan.FromSeconds(0.2)));
            ButtonSearchMedication.BeginAnimation(Button.WidthProperty,widthAnimation);
            ButtonSearchMedication.BeginAnimation(Button.HeightProperty,heightAnimation);
        }

我能做些什么来确保按钮的大小在每次 MouseLeave 后变为原来的大小吗？谢谢

4

1 回答 1

1

鼠标单击/鼠标离开并不真正匹配。您可以不点击就离开。

无论如何，这里给你一个开始是固定的代码：

const double _width = 200;
const double _height = 100;

void ButtonSearchMedication_PreviewMouseLeftButtonDown(object sender, MouseButtonEventArgs e)
{
    var widthAnimation = new DoubleAnimation(_width * 0.8, TimeSpan.FromSeconds(0.2));
    var heightAnimation = new DoubleAnimation(_height * 0.8, TimeSpan.FromSeconds(0.2));
    buttonSearchMedication.BeginAnimation(WidthProperty, widthAnimation);
    buttonSearchMedication.BeginAnimation(HeightProperty, heightAnimation);
}

void ButtonSearchMedication_PreviewMouseLeftButtonUp(object sender, MouseEventArgs e)
{
    var widthAnimation = new DoubleAnimation(_width, TimeSpan.FromSeconds(0.2));
    var heightAnimation = new DoubleAnimation(_height, TimeSpan.FromSeconds(0.2));
    buttonSearchMedication.BeginAnimation(WidthProperty, widthAnimation);
    buttonSearchMedication.BeginAnimation(HeightProperty, heightAnimation);
}

我决定使用鼠标向下/向上事件，您可以将其更改为进入/离开或其他。

如您所见，大小是恒定的，并且动画仅使用to参数（这样在单击事件的情况下的多个操作不会堆叠）。如果按钮大小是动态的，那么您必须在开始动画之前检索并存储原始大小，可能通过使用另一个事件（例如鼠标输入）。

于 2020-01-14T09:55:40.300 回答