DynamicRenderer.Reset(StylusDevice, StylusPointCollection) 方法

定义

命名空间:

System.Windows.Input.StylusPlugIns

程序集:

PresentationCore.dll

清除对当前笔画的呈现并重新绘制它。

public:
 virtual void Reset(System::Windows::Input::StylusDevice ^ stylusDevice, System::Windows::Input::StylusPointCollection ^ stylusPoints);

public virtual void Reset (System.Windows.Input.StylusDevice stylusDevice, System.Windows.Input.StylusPointCollection stylusPoints);

abstract member Reset : System.Windows.Input.StylusDevice * System.Windows.Input.StylusPointCollection -> unit
override this.Reset : System.Windows.Input.StylusDevice * System.Windows.Input.StylusPointCollection -> unit

Public Overridable Sub Reset (stylusDevice As StylusDevice, stylusPoints As StylusPointCollection)

参数

stylusDevice

StylusDevice

当前的触笔设备。

stylusPoints

StylusPointCollection

要重新绘制的触笔接触点。

例外

ArgumentException

触笔或鼠标均未处于关闭状态。

示例

以下示例在绘制当前笔划时更改其颜色。

bool selectionMode = false;

public void ToggleSelect()
{
    StylusDevice currentStylus = Stylus.CurrentStylusDevice;

    // Check if the stylus is down or the mouse is pressed.
    if (Mouse.LeftButton != MouseButtonState.Pressed &&
        (currentStylus == null || currentStylus.InAir))
    {
        return;
    }
    
    selectionMode = !selectionMode;

    // If the control is in selection mode, change the color of 
    // the current stroke dark gray.
    if (selectionMode)
    {
        dynamicRenderer1.DrawingAttributes.Color = Colors.DarkGray;
    }
    else
    {
        dynamicRenderer1.DrawingAttributes.Color = Colors.Purple;
    }

    dynamicRenderer1.Reset(currentStylus, stylusPoints);
}

Private selectionMode As Boolean = False


Public Sub ToggleSelect() 
    Dim currentStylus As StylusDevice = Stylus.CurrentStylusDevice
    
    ' Check if the stylus is down or the mouse is pressed.
    If Mouse.LeftButton <> MouseButtonState.Pressed AndAlso _
      (currentStylus Is Nothing OrElse currentStylus.InAir) Then
        Return
    End If
    
    selectionMode = Not selectionMode
    
    ' If the control is in selection mode, change the color of 
    ' the current stroke dark gray.
    If selectionMode Then
        dynamicRenderer1.DrawingAttributes.Color = Colors.DarkGray
    
    Else
        dynamicRenderer1.DrawingAttributes.Color = Colors.Purple
    End If 
    
    dynamicRenderer1.Reset(currentStylus, stylusPoints)

End Sub

注解

重 DynamicRenderer 绘当前笔划以及传递到 Reset 方法中的任何触笔点。 此方法允许在用户仍在创建笔划时重绘笔划。 平板电脑笔必须触摸数字化器，或者在调用 时 Reset 必须按下鼠标左键。

继承者说明

在派生类中重写 Reset(StylusDevice, StylusPointCollection) 时，请务必调用基类的 Reset(StylusDevice, StylusPointCollection) 方法。