Como: Fazer um objeto seguir o ponteiro do mouse
This example shows how to change the dimensions of an object when the mouse pointer moves on the screen.
The example includes an Extensible Application Markup Language (XAML) file that creates the user interface (UI) and a code-behind file that creates the event handler.
Exemplo
O seguinte XAML cria o UI, que consiste um Ellipse dentro de um StackPanele anexa um manipulador de eventos para o MouseMove de evento.
<Window x:Class="WCSamples.Window1"
xmlns="https://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="https://schemas.microsoft.com/winfx/2006/xaml"
Title="mouseMoveWithPointer"
Height="400"
Width="500"
>
<Canvas MouseMove="MouseMoveHandler"
Background="LemonChiffon">
<Ellipse Name="ellipse" Fill="LightBlue"
Width="100" Height="100"/>
</Canvas>
</Window>
The following code behind creates the MouseMove event handler. When the mouse pointer moves, the height and the width of the Ellipse are increased and decreased.
' raised when the mouse pointer moves.
' Expands the dimensions of an Ellipse when the mouse moves.
Private Sub OnMouseMoveHandler(ByVal sender As Object, ByVal e As MouseEventArgs)
'Get the x and y coordinates of the mouse pointer.
Dim position As System.Windows.Point
position = e.GetPosition(Me)
Dim pX As Double
pX = position.X
Dim pY As Double
pY = position.Y
'Set the Height and Width of the Ellipse to the mouse coordinates.
ellipse1.Height = pY
ellipse1.Width = pX
End Sub
// raised when the mouse pointer moves.
// Expands the dimensions of an Ellipse when the mouse moves.
private void MouseMoveHandler(object sender, MouseEventArgs e)
{
// Get the x and y coordinates of the mouse pointer.
System.Windows.Point position = e.GetPosition(this);
double pX = position.X;
double pY = position.Y;
// Sets the Height/Width of the circle to the mouse coordinates.
ellipse.Width = pX;
ellipse.Height = pY;
}