我正在使用比例转换来允许用户调整控件大小。但是,发生的事情是,当您开始移动鼠标时,控件会跳到新的大小,然后奇怪地缩放。您将鼠标从起始位置移动的越远,大小的增加就越大。

我期望它计算量表的应用方式。这是代码:

private void ResizeGrip_MouseDown(object sender, MouseButtonEventArgs e)
{
    ResizeHandle.CaptureMouse();

    //Get the initial coordinate cursor location on the window
    initBtmX = e.GetPosition(this).X;

    bottomResize = true;
}

private void ResizeGrip_MouseUp(object sender, MouseButtonEventArgs e)
{
    bottomResize = false;
    ResizeHandle.ReleaseMouseCapture();
}

private void ResizeGrip_MouseMove(object sender, MouseEventArgs e)
{
    if( bottomResize == true)
    {
        //Get the new Y coordinate cursor location
        double newBtmX = e.GetPosition(this).X;


        //Get the smallest change between the initial and new cursor location
        double diffX = initBtmX - newBtmX;

        // Let our rectangle capture the mouse
        ResizeHandle.CaptureMouse();

        double newWidth = e.GetPosition(this).X - diffX;

        double scaler = newWidth / ResizeContainer.ActualWidth;

        Console.WriteLine("newWidth: {0}, scalar: {1}", newWidth, scaler);


        if (scaler < 0.75 || scaler > 3)
            return;

        ScaleTransform scale = new ScaleTransform(scaler, scaler);

        ResizeContainer.LayoutTransform = scale;
    }
}

更新:现在使用XAML

<wtk:IToolDialog x:Name="VideoPlayer" ParentControl="{Binding ElementName=Stage}" DialogTitle="Video Player" Margin="90,5,0,0">
    <Grid> 
        <Grid x:Name="ResizeContainer" ClipToBounds="True" Width="320" Height="240" HorizontalAlignment="Center" VerticalAlignment="Bottom" Margin="0,0,0,1">
            <!-- The video frame -->
            <Image Stretch="Fill" Source="{Binding CurrentFrameImage}" x:Name="VideoImage" />
            <Grid>
                <pplcontrols:VideoGroundPlane Foreground="Black" GridSize="20" GroundPlane="{Binding GroundPlane}">
                </pplcontrols:VideoGroundPlane>
            </Grid>
            <Grid x:Name="HitMask" IsHitTestVisible="False"/>
        </Grid>
        <ResizeGrip Cursor="SizeNWSE" x:Name="ResizeHandle" VerticalAlignment="Bottom" HorizontalAlignment="Right" Mouse.MouseDown="ResizeGrip_MouseDown" Mouse.MouseUp="ResizeGrip_MouseUp" Mouse.MouseMove="ResizeGrip_MouseMove"></ResizeGrip>
    </Grid>
</wtk:IToolDialog>
有帮助吗?

解决方案

您不使用resizecontainer.rendertrans.rendertrans.resizecontainer.layouttransform的任何原因吗?即使用

ResizeContainer.LayoutTransform = scale;

如果您希望秤是线性的,我认为您应该使用

double scaler = 1 - diff / ResizeContainer.ActualWidth;

编辑:

代码中有一个错误,如果您尝试调整不止一次大小,则导致缩放控件大小“跳跃”。我建议您做以下操作:

将RenderTransForm添加到您的ResizeContainer网格中:

<Grid.RenderTransform>
    <ScaleTransform x:Name="transform" ScaleX="1" ScaleY="1" />
</Grid.RenderTransform>

将Mousemove事件处理程序中的代码更改为以下内容:

if (bottomResize)
{
    double newBtmX = e.GetPosition(this).X;
    double scaler = -(initBtmX - newBtmX) / grid1.ActualWidth;
    initBtmX = newBtmX;

    transform.ScaleX += scaler;
    transform.ScaleY += scaler;
}

这样,您可以将秤在拖动时移动的任何少量移动。网格中的所有儿童控制也应扩展。

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