WPF.以编程方式将图像移动到(X,Y)的最简单方法？

Question

有没有人知道使用没有XAML的WPF动画动画从Image的当前位置动画到新位置(X,Y)的简单方法,100%以编程方式？并且没有引用"this"(使用RegisterName等).

我正在尝试为Image做一个扩展类来做动画的东西.通过动画更改宽度和高度属性很容易,但在搜索对象的位置动画后,它突然变得更加先进.

因为它是一个扩展类,所以我只会引用实际的Image对象,而X和YI想要移动它.

public static void MoveTo(this Image targetControl, double X, double Y, double Width, double Height){
 //code here
 ...
}

更新:

谢谢.几乎工作.似乎GetTop和GetLeft返回'NaN'没有明确设置.在这篇文章中找到了解决方法:Canvas.GetTop()返回NaN

public static void MoveTo(this Image target, double newX, double newY) {
                Vector offset = VisualTreeHelper.GetOffset(target);
                var top = offset.Y;
                var left = offset.X;
                TranslateTransform trans = new TranslateTransform();
                target.RenderTransform = trans;
                DoubleAnimation anim1 = new DoubleAnimation(0, newY - top, TimeSpan.FromSeconds(10));
                DoubleAnimation anim2 = new DoubleAnimation(0, newX - left, TimeSpan.FromSeconds(10));
                trans.BeginAnimation(TranslateTransform.YProperty, anim1);
                trans.BeginAnimation(TranslateTransform.XProperty, anim2);
        }

我不得不将两个值(FROM)与0交换.我认为必须是因为在这种情况下,图片的左上角是原点？但现在它有效.

Answer 1

试试这个:

public static void MoveTo(this Image target, double newX, double newY)
{
    var top = Canvas.GetTop(target);
    var left = Canvas.GetLeft(target);
    TranslateTransform trans = new TranslateTransform();
    target.RenderTransform = trans;
    DoubleAnimation anim1 = new DoubleAnimation(top, newY - top, TimeSpan.FromSeconds(10));
    DoubleAnimation anim2 = new DoubleAnimation(left, newX - left, TimeSpan.FromSeconds(10));
    trans.BeginAnimation(TranslateTransform.XProperty,anim1);
    trans.BeginAnimation(TranslateTransform.YProperty,anim2);
}

Answer 2

这是...它改变了大小并MediaElement在Canvas. 只需输入您的参数：

Storyboard story = new Storyboard();
DoubleAnimation dbWidth = new DoubleAnimation();
dbWidth.From = mediaElement1.Width;
dbWidth.To = 600;
dbWidth.Duration = new Duration(TimeSpan.FromSeconds(.25));

DoubleAnimation dbHeight = new DoubleAnimation();
dbHeight.From = mediaElement1.Height;
dbHeight.To = 400;
dbHeight.Duration = dbWidth.Duration;

story.Children.Add(dbWidth);
Storyboard.SetTargetName(dbWidth, mediaElement1.Name);
Storyboard.SetTargetProperty(dbWidth, new PropertyPath(MediaElement.WidthProperty));

story.Children.Add(dbHeight);
Storyboard.SetTargetName(dbHeight, mediaElement1.Name);
Storyboard.SetTargetProperty(dbHeight, new PropertyPath(MediaElement.HeightProperty));

DoubleAnimation dbCanvasX = new DoubleAnimation();
dbCanvasX.From = 0;
dbCanvasX.To = 5;
dbCanvasX.Duration = new Duration(TimeSpan.FromSeconds(.25));

DoubleAnimation dbCanvasY = new DoubleAnimation();
dbCanvasY.From = 0;
dbCanvasY.To = 5;
dbCanvasY.Duration = dbCanvasX.Duration;

story.Children.Add(dbCanvasX);
Storyboard.SetTargetName(dbCanvasX, mediaElement1.Name);
Storyboard.SetTargetProperty(dbCanvasX, new PropertyPath(Canvas.LeftProperty));

story.Children.Add(dbCanvasY);
Storyboard.SetTargetName(dbCanvasY, mediaElement1.Name);
Storyboard.SetTargetProperty(dbCanvasY, new PropertyPath(Canvas.TopProperty));

story.Begin(this);

<Viewbox Stretch="Uniform" StretchDirection="Both" SnapsToDevicePixels="True">
        <Grid  Width="640" Height="480" Name="MainLayout" SnapsToDevicePixels="True" Background="Black">
            <Canvas Width="640" Height="480" Name="MainCanvas" SnapsToDevicePixels="True">
                <MediaElement Height="171" HorizontalAlignment="Left" Name="mediaElement1" VerticalAlignment="Top" Width="337" LoadedBehavior="Manual" Margin="166,140,0,0" Canvas.Left="-162" Canvas.Top="-140" />
                <Button Canvas.Left="294" Canvas.Top="196" Content="Button" Height="23" Name="button1" Width="75" Click="button1_Click" />
            </Canvas>
        </Grid>
    </Viewbox>

更新：

而不是MediaElement使用这一行：

 <Rectangle Height="171" HorizontalAlignment="Left" Name="mediaElement1" VerticalAlignment="Top" Width="337"    Margin="166,140,0,0" Canvas.Left="-162" Canvas.Top="-140" Fill="{DynamicResource {x:Static SystemColors.MenuBarBrushKey}}" />

并且不要忘记将 C# 代码放在：

private void button1_Click(object sender, RoutedEventArgs e) {}

您也可以使用MediaElement，但您必须定义 aVideoClip才能看到某些东西；)