Nasıl yapılır: ScrollChanged Olayını İşleme
Örnek
Bu örnek, bir olayı ScrollChanged işlemeyi ScrollViewer gösterir.
Bölümleri FlowDocument olan bir öğe Paragraph XAML'de tanımlanır. Olay ScrollChanged kullanıcı etkileşimi nedeniyle oluştuğunda, bir işleyici çağrılır ve olayın oluştuğuna TextBlock işaret eden bir metni yazılır.
<ScrollViewer Name="svrContent" CanContentScroll="False" ScrollChanged="sChanged">
<FlowDocument FontFamily="Arial" PageWidth="400">
<Paragraph>
Lorem ipsum dolor sit amet, consectetuer adipiscing elit, sed diam nonummy nibh euismod tincidunt ut
laoreet dolore magna aliquam erat volutpat. Ut wisi enim ad minim veniam, quis nostrud exerci tation
ullamcorper suscipit lobortis nisl ut aliquip ex ea commodo consequat. Duis autem vel eum iriure.
Lorem ipsum dolor sit amet, consectetuer adipiscing elit, sed diam nonummy nibh euismod tincidunt ut
laoreet dolore magna aliquam erat volutpat. Ut wisi enim ad minim veniam, quis nostrud exerci tation
ullamcorper suscipit lobortis nisl ut aliquip ex ea commodo consequat. Duis autem vel eum iriure.
Lorem ipsum dolor sit amet, consectetuer adipiscing elit, sed diam nonummy nibh euismod tincidunt ut
laoreet dolore magna aliquam erat volutpat. Ut wisi enim ad minim veniam, quis nostrud exerci tation
ullamcorper suscipit lobortis nisl ut aliquip ex ea commodo consequat. Duis autem vel eum iriure.
</Paragraph>
<Paragraph>
Lorem ipsum dolor sit amet, consectetuer adipiscing elit, sed diam nonummy nibh euismod tincidunt ut
laoreet dolore magna aliquam erat volutpat. Ut wisi enim ad minim veniam, quis nostrud exerci tation
ullamcorper suscipit lobortis nisl ut aliquip ex ea commodo consequat. Duis autem vel eum iriure.
Lorem ipsum dolor sit amet, consectetuer adipiscing elit, sed diam nonummy nibh euismod tincidunt ut
laoreet dolore magna aliquam erat volutpat. Ut wisi enim ad minim veniam, quis nostrud exerci tation
ullamcorper suscipit lobortis nisl ut aliquip ex ea commodo consequat. Duis autem vel eum iriure.
Lorem ipsum dolor sit amet, consectetuer adipiscing elit, sed diam nonummy nibh euismod tincidunt ut
laoreet dolore magna aliquam erat volutpat. Ut wisi enim ad minim veniam, quis nostrud exerci tation
ullamcorper suscipit lobortis nisl ut aliquip ex ea commodo consequat. Duis autem vel eum iriure.
</Paragraph>
</FlowDocument>
</ScrollViewer>
private void sChanged(object sender, ScrollChangedEventArgs e)
{
if (svrContent.CanContentScroll == true)
{
tBlock1.Foreground = System.Windows.Media.Brushes.Red;
tBlock1.Text = "ScrollChangedEvent just Occurred";
tBlock2.Text = "ExtentHeight is now " + e.ExtentHeight.ToString();
tBlock3.Text = "ExtentWidth is now " + e.ExtentWidth.ToString();
tBlock4.Text = "ExtentHeightChange was " + e.ExtentHeightChange.ToString();
tBlock5.Text = "ExtentWidthChange was " + e.ExtentWidthChange.ToString();
tBlock6.Text = "HorizontalOffset is now " + e.HorizontalOffset.ToString();
tBlock7.Text = "VerticalOffset is now " + e.VerticalOffset.ToString();
tBlock8.Text = "HorizontalChange was " + e.HorizontalChange.ToString();
tBlock9.Text = "VerticalChange was " + e.VerticalChange.ToString();
tBlock10.Text = "ViewportHeight is now " + e.ViewportHeight.ToString();
tBlock11.Text = "ViewportWidth is now " + e.ViewportWidth.ToString();
tBlock12.Text = "ViewportHeightChange was " + e.ViewportHeightChange.ToString();
tBlock13.Text = "ViewportWidthChange was " + e.ViewportWidthChange.ToString();
}
else
{
tBlock1.Text = "";
}
Private Sub sChanged(ByVal sender As Object, ByVal args As ScrollChangedEventArgs)
If (sv1.CanContentScroll = True) Then
tBlock1.Foreground = System.Windows.Media.Brushes.Red
tBlock1.Text = "ScrollChangedEvent just Occurred"
tBlock3.Text = "ExtentWidth is now " + args.ExtentWidth.ToString()
tBlock4.Text = "ExtentHeightChange was " + args.ExtentHeightChange.ToString()
tBlock5.Text = "ExtentWidthChange was " + args.ExtentWidthChange.ToString()
tBlock6.Text = "HorizontalOffset is now " + args.HorizontalOffset.ToString()
tBlock7.Text = "VerticalOffset is now " + args.VerticalOffset.ToString()
tBlock8.Text = "HorizontalChange was " + args.HorizontalChange.ToString()
tBlock9.Text = "VerticalChange was " + args.VerticalChange.ToString()
tBlock10.Text = "ViewportHeight is now " + args.ViewportHeight.ToString()
tBlock11.Text = "ViewportWidth is now " + args.ViewportWidth.ToString()
tBlock12.Text = "ViewportHeightChange was " + args.ViewportHeightChange.ToString()
tBlock13.Text = "ViewportWidthChange was " + args.ViewportWidthChange.ToString()
Else
tBlock1.Text = ""
End If