public LoadingScreen()
{
InitializeComponent();
BackGrid.Visibility = Visibility.Visible;
LoadRing.IsActive = true;
BackGrid.Fade(value: 1, duration: 400).StartAsync();
}
/// <summary>
/// //移动,根据X.Y的值来移动。并把当前鼠标位置赋值给mouseXY.
/// </summary>
private void Domousemove(ContentControl img, MouseEventArgs e)
{
if (e.LeftButton != MouseButtonState.Pressed)
{
return;
}
var group = BackGrid.FindResource("Imageview") as TransformGroup;
var transform = group.Children[1] as TranslateTransform;
var transform1 = group.Children[0] as TranslateTransform;
var position = e.GetPosition(img);
transform.X -= mouseXY.X - position.X;
transform.Y -= mouseXY.Y - position.Y;
if (scale < 1.1)
{
transform.X = 0; transform.Y = 0;
return;
}
if ((700 - transform.X) >= 700 * scale && transform.Y > 0)
{
transform.X = (700 - 700 * scale); transform.Y = 0; return;
}
if ((600 - transform.Y) >= 600 * scale && transform.X > 0)
{
transform.X = 0; transform.Y = (600 - 600 * scale); return;
}
if (transform.X > 0 && transform.Y <= 0)
{
transform.X = 0; return;
}
if (transform.Y > 0 && transform.X <= 0)
{
transform.Y = 0; return;
}
if (transform.X > 0 && transform.Y > 0)
{
transform.X = 0; transform.Y = 0; return;
}
if ((700 - transform.X) >= 700 * scale && (600 - transform.Y) < 600 * scale)
{
transform.X = (700 - 700 * scale); return;
}
if ((600 - transform.Y) >= 600 * scale && (700 - transform.X) < 700 * scale)
{
transform.Y = (600 - 600 * scale); return;
}
if ((700 - transform.X) >= 700 * scale && (600 - transform.Y) >= 600 * scale)
{
transform.X = (700 - 700 * scale); transform.Y = (600 - 600 * scale); return;
}
mouseXY = position;
}
/// <summary>
/// //实现图幅的放大缩小
/// </summary>
private void ContentControl_MouseWheel(object sender, MouseWheelEventArgs e)
{
var img = sender as ContentControl;
if (img == null)
{
return;
}
var point = e.GetPosition(img);
var group = BackGrid.FindResource("Imageview") as TransformGroup;
var delta = e.Delta * 0.001;
DowheelZoom(group, point, delta);
}
