[英]In Concurrency in C# there is a 'MouseEventArgs' does not contain a definition for 'GetPosition'
[英]'MouseEventArgs' does not contain a definition for 'GetPosition'
我確定這是一個非常簡單的方法,但我正在開發一個 C# UWP 應用程序,並試圖制作一個可拖動的用戶控件,但在我的鼠標事件中,我收到以下錯誤:
CS1061“MouseEventArgs”不包含“GetPosition”的定義,並且找不到接受“MouseEventArgs”類型的第一個參數的擴展方法“GetPosition”(您是否缺少 using 指令或程序集引用?)
我發現這個示例我在堆棧上使用( 拖動 WPF 用戶控件)並且之前使用過鼠標按下事件在 winforms 中的列表框之間拖動項目,但沒有這個問題。
這是我的代碼:
<UserControl
x:Class="HopHaus.TimerControl"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:local="using:HopHaus"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
mc:Ignorable="d"
d:DesignHeight="300"
d:DesignWidth="400" Width="120" Height="60">
<Grid Margin="0,0,0,167" Width="120">
<Rectangle Fill="#FF404040" HorizontalAlignment="Left" Height="60" Margin="1,0,-1,-133" Stroke="Black" VerticalAlignment="Top" Width="120"/>
<TextBox x:Name="timersetBox" Margin="-1,-2,1,-59" TextWrapping="Wrap" Text="00" VerticalAlignment="Top" Height="60" BorderBrush="Transparent" FontFamily="Fonts/DIGITAL.TTF#Digital" Foreground="#FF72FB00" FontSize="50" Background="Transparent" TextAlignment="Right" AcceptsReturn="True" SelectionHighlightColor="#000078D7" Width="120"/>
<Border x:Name="dragBrdr" BorderBrush="Black" BorderThickness="1" HorizontalAlignment="Left" Height="59" Margin="2,0,0,-59" VerticalAlignment="Top" Width="118"/>
</Grid>
</UserControl>
和:
public sealed partial class TimerControl : UserControl
{
Point currentPoint;
Point anchorPoint;
bool isInDrag;
public TimerControl()
{
this.InitializeComponent();
}
private TranslateTransform transform = new TranslateTransform();
private void root_MouseMove(object sender, MouseEventArgs e)
{
if (isInDrag)
{
var element = sender as FrameworkElement;
currentPoint = e.GetPosition(null);
transform.X += currentPoint.X - anchorPoint.X;
transform.Y += (currentPoint.Y - anchorPoint.Y);
this.RenderTransform = transform;
anchorPoint = currentPoint;
}
}
}
我使用System.Windows.Input
和using Windows.Devices.Input
提前感謝一堆提供的任何幫助。
為了更好地支持觸摸和墨跡書寫,對鼠標事件進行了抽象。 這稱為指針。 所以你有一個 PointerMoved 事件
在 xaml 中:
<Grid Background="{ThemeResource ApplicationPageBackgroundThemeBrush}"
PointerMoved="Grid_PointerMoved">
</Grid>
並在代碼中
private void Grid_PointerMoved(object sender, PointerRoutedEventArgs e)
{
var point = e.GetCurrentPoint(null);
}
但我仍然不確定如何獲取我的 var 點並將其轉換為我的 MainPage 上用戶控件的新位置
正如@Dave Smits 所說,您需要一個Pointer
事件句柄。 有關句柄指針輸入的更多詳細信息,請參閱此文檔。 我認為你困惑的是這段代碼var point = e.GetCurrentPoint(null);
返回PointerPoint
對象而不是轉換所需的Point
結構。 在這種情況下,您可以通過PointerPoint.Position
屬性獲取Point
結構。 更新代碼如下:
<UserControl
...
mc:Ignorable="d"
d:DesignHeight="300"
d:DesignWidth="400"
Width="120" Height="60" PointerMoved="Grid_PointerMoved" CanDrag="True">
<Grid Margin="0,0,0,167" Width="120" >
<Rectangle Fill="#FF404040" HorizontalAlignment="Left" Height="60" Margin="1,0,-1,-133" Stroke="Black" VerticalAlignment="Top" Width="120"/>
<TextBox x:Name="timersetBox" Margin="-1,-2,1,-59" TextWrapping="Wrap" Text="00" VerticalAlignment="Top" Height="60" BorderBrush="Transparent" FontFamily="Fonts/DIGITAL.TTF#Digital" Foreground="#FF72FB00" FontSize="50" Background="Transparent" TextAlignment="Right" AcceptsReturn="True" SelectionHighlightColor="#000078D7" Width="120"/>
<Border x:Name="dragBrdr" BorderBrush="Black" BorderThickness="1" HorizontalAlignment="Left" Height="59" Margin="2,0,0,-59" VerticalAlignment="Top" Width="118"/>
</Grid>
</UserControl>
背后的代碼
Point currentPoint;
Point anchorPoint;
bool isInDrag;
private TranslateTransform transform = new TranslateTransform();
private void Grid_PointerMoved(object sender, PointerRoutedEventArgs e)
{
anchorPoint = new Point(300, 200);
isInDrag = true;
if (isInDrag)
{
var element = sender as FrameworkElement;
PointerPoint currentPointpointer = e.GetCurrentPoint(null);
currentPoint = currentPointpointer.Position;
transform.X += currentPoint.X - anchorPoint.X;
transform.Y += (currentPoint.Y - anchorPoint.Y);
this.RenderTransform = transform;
anchorPoint = currentPoint;
}
}
此外,對於從一個點到另一個點的轉換,我建議您使用PointAnimation 。
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