Scaletransform非线性转换
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24-10-2019 - |
题
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>
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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