Shape.PointToScreen メソッド

[アーティクル]
08/22/2008

更新 : 2007 年 11 月

指定したクライアントポイントの位置を計算して画面座標を算出します。

名前空間 : Microsoft.VisualBasic.PowerPacks
アセンブリ : Microsoft.VisualBasic.PowerPacks.Vs (Microsoft.VisualBasic.PowerPacks.Vs.dll 内)

構文

'宣言
Public Function PointToScreen ( _
    p As Point _
) As Point
'使用
Dim instance As Shape
Dim p As Point
Dim returnValue As Point

returnValue = instance.PointToScreen(p)

public Point PointToScreen(
    Point p
)

public:
Point PointToScreen(
    Point p
)

public function PointToScreen(
    p : Point
) : Point

パラメータ

p
型 : System.Drawing.Point

クライアント座標で示された変換対象の Point。

戻り値

型 : System.Drawing.Point

変換された Point、p を画面座標で表す Point。

例

ドラッグ操作がクライアント領域で終了したときに、PointToScreen メソッドと RectangleToScreen メソッドを使用して RectangleShape の色を変更する例を次に示します。この例では、RectangleShape1 という名前の RectangleShape コントロールがフォーム上に配置され、BackStyle プロパティが Opaque に設定されている必要があります。

Public isDrag As Boolean = True
Public theRectangle As System.Drawing.Rectangle

Private Sub Form1_MouseMove(ByVal sender As Object, ByVal e As  _
  System.Windows.Forms.MouseEventArgs) Handles _
  RectangleShape1.MouseMove

    ' If the mouse is being dragged, undraw and redraw the rectangle
    ' while the mouse moves.
    If (isDrag) Then

        ' Hide the previous rectangle by calling the
        ' DrawReversibleFrame method, using the same parameters.
        ControlPaint.DrawReversibleFrame(theRectangle, Me.BackColor, _
          FrameStyle.Dashed)

        ' Calculate the endpoint and dimensions for the new rectangle, 
        ' again by using the PointToScreen method.
        Dim startPoint As Point = New Point(RectangleShape1.Width, _
         RectangleShape1.Height)
        Dim endPoint As Point = RectangleShape1.PointToScreen(New Point(e.X, e.Y))
        Dim width As Integer = endPoint.X - startPoint.X
        Dim height As Integer = endPoint.Y - startPoint.Y
        theRectangle = New Rectangle(startPoint.X, startPoint.Y, _
         width, height)

        ' Draw the new rectangle by calling DrawReversibleFrame again.  
        ControlPaint.DrawReversibleFrame(theRectangle, Me.BackColor, _
          FrameStyle.Dashed)
    End If
End Sub

Private Sub Form1_MouseUp(ByVal sender As Object, ByVal e As  _
  System.Windows.Forms.MouseEventArgs) Handles RectangleShape1.MouseUp

    ' If the MouseUp event occurs, the user is not dragging.
    isDrag = False
    ' Draw the rectangle to be evaluated. Set a dashed frame style 
    ' by using the FrameStyle enumeration.
    ControlPaint.DrawReversibleFrame(theRectangle, Me.BackColor, _
      FrameStyle.Dashed)
    ' Find out which controls intersect the rectangle, and change
    ' their colors.
    ' The method uses the RectangleToScreen method to convert the 
    ' control's client coordinates to screen coordinates.
    Dim controlRectangle As Rectangle

    controlRectangle = RectangleShape1.RectangleToScreen _
      (RectangleShape1.ClientRectangle)
    If controlRectangle.IntersectsWith(theRectangle) Then
        RectangleShape1.BackColor = Color.BurlyWood
    End If

    ' Reset the rectangle.
    theRectangle = New Rectangle(0, 0, 0, 0)
End Sub

public bool isDrag = true;
public System.Drawing.Rectangle theRectangle;

private void Form1_MouseMove(object sender, System.Windows.Forms.MouseEventArgs e)
{

    // If the mouse is being dragged, undraw and redraw the rectangle
    // while the mouse moves.
    if (isDrag)

    // Hide the previous rectangle by calling the
    // DrawReversibleFrame method, using the same parameters.
    {
        ControlPaint.DrawReversibleFrame(theRectangle, this.BackColor, FrameStyle.Dashed);

        // Calculate the endpoint and dimensions for the new rectangle, 
        // again by using the PointToScreen method.
        Point startPoint = new Point(rectangleShape1.Width, rectangleShape1.Height);
        Point endPoint = rectangleShape1.PointToScreen(new Point(e.X, e.Y));
        int width = endPoint.X - startPoint.X;
        int height = endPoint.Y - startPoint.Y;
        theRectangle = new Rectangle(startPoint.X, startPoint.Y, width, height);

        // Draw the new rectangle by calling DrawReversibleFrame again.  
        ControlPaint.DrawReversibleFrame(theRectangle, this.BackColor, FrameStyle.Dashed);
    }
}

private void Form1_MouseUp(object sender, System.Windows.Forms.MouseEventArgs e)
{

    // If the MouseUp event occurs, the user is not dragging.
    isDrag = false;
    // Draw the rectangle to be evaluated. Set a dashed frame style 
    // by using the FrameStyle enumeration.
    ControlPaint.DrawReversibleFrame(theRectangle, this.BackColor, FrameStyle.Dashed);
    // Find out which controls intersect the rectangle, and change
    // their colors.
    // The method uses the RectangleToScreen method to convert the 
    // control's client coordinates to screen coordinates.
    Rectangle controlRectangle;

    controlRectangle = rectangleShape1.RectangleToScreen(rectangleShape1.ClientRectangle);
    if (controlRectangle.IntersectsWith(theRectangle))
    {
        rectangleShape1.BackColor = Color.BurlyWood;
    }

    // Reset the rectangle.
    theRectangle = new Rectangle(0, 0, 0, 0);
}