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WPF precision scrolling

The Brick answered on February 15, 2023 Popularity 1/10 Helpfulness 1/10

answer WPF precision scrolling

related WPF precision scrolling

WPF precision scrolling

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Private Sub ScrollViewer_PreviewMouseWheel(sender As Object, e As MouseWheelEventArgs)
' Try catches here just to ensure app does not crash and instead falls back to default WPF scrolling behaviour if an exception occurs here for whatever reason

    	Try

        	' Disables custom scroll handling when scroll by one screen at a time is enabled in mouse settings. Feel free to handle this yourself if you wish.

        	If System.Windows.Forms.SystemInformation.MouseWheelScrollLines = -1 Then

            		e.Handled = False

        	Else

            		Try

                		' Scrolls the scroll viewer according to the delta value and the user's scrolling settings

                		Dim SenderScrollViewer As System.Windows.Controls.ScrollViewer = sender

                    		SenderScrollViewer.ScrollToVerticalOffset(SenderScrollViewer.VerticalOffset - e.Delta * 10 * System.Windows.Forms.SystemInformation.MouseWheelScrollLines / 120)

                		e.Handled = True

            		Catch

        		End Try

        	End If

    	Catch

    	End Try
End Sub

Popularity 1/10 Helpfulness 1/10 Language vb

Source: codingguides.quinnscomputing.com

Tags: vba wpf

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Contributed on Feb 15 2023

The Brick

0 Answers Avg Quality 2/10

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WPF precision scrolling

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 private void ScrollViewer_PreviewMouseWheel(object sender, MouseWheelEventArgs e)
        {
// Try catches here just to ensure app does not crash and instead falls back to default WPF scrolling behaviour if an exception occurs here for whatever reason

try

{

// Disables custom scroll handling when scroll by one screen at a time is enabled in mouse settings. Feel free to handle this yourself if you wish.

if (System.Windows.Forms.SystemInformation.MouseWheelScrollLines == -1)

        e.Handled = false;

   else

   	try

        {

        	// Scrolls the scroll viewer according to the delta value and the user's scrolling settings

                System.Windows.Controls.ScrollViewer SenderScrollViewer = (System.Windows.Controls.ScrollViewer)sender;

                SenderScrollViewer.ScrollToVerticalOffset(SenderScrollViewer.VerticalOffset - e.Delta * 10 * 		System.Windows.Forms.SystemInformation.MouseWheelScrollLines / (double)120);

                e.Handled = true;

                }

                catch

                {

                }

        }

        catch

        {

        }
        }

Popularity 2/10 Helpfulness 1/10 Language csharp

Source: codingguides.quinnscomputing.com

Tags: wpf c#

Link to this answer
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Contributed on Feb 15 2023

The Brick

0 Answers Avg Quality 2/10

WPF precision scrolling

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