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制作一个扩展类来做动画内容。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，它突然变得更加高级。

因为它是一个扩展类，所以我只会引用实际的Image对象以及我要移动它的X和Y.

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

更新

感谢。几乎工作。似乎GetTop和GetLeft返回'NaN'没有明确设置。在此帖子中找到了解决方法：Canvas.GetTop() returning 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......它会改变大小并在MediaElement下移动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>

<强>更新

而不是MediaElement使用此行：

 <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}}" />

不要忘记将C＃代码放到：

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

您也可以使用MediaElement，但必须定义VideoClip以查看内容;）

Answer 3

此代码基于@ DeanChalk的回答。

它将Image（Canvas）对角线内的RFID_Token从右上角移动到左下角，位于Image的中心位置{ {1}}（Canvas）。

RFID_Reader

<Canvas>
    <Canvas x:Name="RFID_Reader_Canvas">
        <Image x:Name="RFID_Reader" Source="RFID-Reader.png" Height="456" Width="682" Canvas.Left="37" Canvas.Top="524"/>
    </Canvas>
    <Canvas x:Name="RFID_Token_Canvas">
        <Image x:Name="RFID_Token" Source="RFID-Token.png" Height="268" Width="343" Canvas.Left="874" Canvas.Top="70"/>
    </Canvas>
</Canvas>

Answer 4

我的嵌套元素保持NaN或0值，这是Danny答案的修改版本：

    public void MoveTo(Canvas canvas, FrameworkElement target, FrameworkElement destination)
    {
        Point oldPoint = target.TransformToAncestor(canvas).Transform(new Point(0, 0));
        Point newPoint = destination.TransformToAncestor(canvas).Transform(new Point(0, 0));

        var EndX = destination.Width / 2 + newPoint.X - oldPoint.X - (target.Width / 2);
        var EndY = destination.Height / 2 + newPoint.Y - oldPoint.Y - (target.Height / 2);

        TranslateTransform trans = new TranslateTransform();
        target.RenderTransform = trans;
        DoubleAnimation anim1 = new DoubleAnimation(0, EndX, TimeSpan.FromSeconds(0.3));
        DoubleAnimation anim2 = new DoubleAnimation(0, EndY, TimeSpan.FromSeconds(0.3));
        trans.BeginAnimation(TranslateTransform.XProperty, anim1);
        trans.BeginAnimation(TranslateTransform.YProperty, anim2);
    }

Answer 5

请找到使用Canvas的Left和Top属性作为扩展方法的解决方案。请参阅以下代码：

    public static void MoveTo(this Image target, Point newP)
    {

        Point oldP = new Point();
        oldP.X = Canvas.GetLeft(target);
        oldP.Y = Canvas.GetTop(target);

        DoubleAnimation anim1 = new DoubleAnimation(oldP.X, newP.X, TimeSpan.FromSeconds(0.2));
        DoubleAnimation anim2 = new DoubleAnimation(oldP.Y, newP.Y , TimeSpan.FromSeconds(0.2));

        target.BeginAnimation(Canvas.LeftProperty , anim1);
        target.BeginAnimation(Canvas.TopProperty, anim2);

    }

WPF。以编程方式将图像移动到（X，Y）的最简单方法？

5 个答案: