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WPF公司。以编程方式将图像移动到(X,Y)的最简单方法?

animation wpf

Wolf5 · 技术社区 · 14 年前

有没有人知道一种简单的方法,可以使用WPF动画将一个从图像的当前位置移动到一个新位置(X,Y),而不使用XAML,100%编程?也没有提到“这个”(注册名等)。

我正在尝试为图像制作一个扩展类,以便对其进行动画处理。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,它突然变得更高级。

因为它是一个扩展类,所以我只能引用实际的图像对象和要移动到的X和Y。

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

更新:

谢谢。差不多可以了。似乎GetTop和GetLeft返回的“NaN”未显式设置。在这篇文章中找到了解决方法: 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);
        }

我不得不用0来交换其中的两个值。我想这一定是因为在这种情况下,图片的左上角是原点?但现在成功了。

5 回复 | 直到 7 年前

Danny Beckett 10 年前

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);
}

Danny Beckett 10 年前

在这里。。。它会改变大小并移动 MediaElement 在 Canvas . 只需输入参数:

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 中间元素 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}}" />

别忘了把C代码放在:

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

你可以用 中间元素 但是你必须定义 VideoClip 看到一些东西;)

Danny Beckett 10 年前

此代码基于@DeanChalk的答案。

它移动一个 Image 包含在 Canvas ( RFID_Token )从右上到左下呈对角线,位于另一个 图像 在 帆布 ( 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>

var StartX = Canvas.GetLeft(RFID_Token);
var StartY = Canvas.GetTop(RFID_Token);

var EndX = RFID_Reader.Width / 2 + Canvas.GetLeft(RFID_Reader) - StartX - (RFID_Token.Width / 2);
var EndY = RFID_Reader.Height / 2 + Canvas.GetTop(RFID_Reader) - StartY - (RFID_Token.Height / 2);

var AnimationX = new DoubleAnimation(0, EndX, TimeSpan.FromSeconds(1));
var AnimationY = new DoubleAnimation(0, EndY, TimeSpan.FromSeconds(1));

var Transform = new TranslateTransform();
RFID_Token_Canvas.RenderTransform = Transform;

Transform.BeginAnimation(TranslateTransform.XProperty, AnimationX);
Transform.BeginAnimation(TranslateTransform.YProperty, AnimationY);

Akli 7 年前

我的嵌套元素一直有NaN或0值,下面是Danny的修改版答案:

    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);
    }

laserman 9 年前

请为扩展方法找到一个使用Canvas的左侧和顶部属性的解决方案。请参见以下代码:

    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);

    }