As I have already explained in my last article WPF involves so many event but here I will
explain about the Input Event of the WPF. As input word implies some parameter
which woks for the system or application as a input on the basis of parameter
system or application will respond and event stands for the action like whenever
you click on a button or type some text into a form in your browser, you are
using events.
The Input Events divided into three categories
Keyboard events, Mouse events, Stylus events. This part of article explain about
the Stylus events.
Stylus Events:
A Stylus is the pen-like device used by Tablet
PCs--acts like a mouse by default. In other words, its use raises events such as
MouseMove, MouseDown, and MouseUp. This behavior is essential for a stylus to be
usable with programs that aren't designed specifically for a Tablet PC. However,
if you want to provide an experience that is optimized for a stylus, you can
handle stylus-specific events such as StylusMove, StylusDown, and StylusUp. A
stylus can do more "tricks" than a mouse, as evidenced by some of its events
that have no mouse counterpart, such as StylusInAirMove,
StylusSystemGesture, StylusInRange, and StylusOutOfRange. There are other ways
to exploit a stylus without handling these events directly, however. The next
chapter, "Introducing WPF's Controls," shows how this can be done with a
powerful InkCanvas element.
Example of the Stylus Event
Xaml Code
<Window
x:Class="AboutDialog" MouseRightButtonDown= "AboutDialog_MouseRightButtonDown"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Title="ABOUT
DEVELOPMENT" SizeToContent="WidthAndHeight"
Background="Blue">
<StackPanel>
<Label
FontWeight="Bold"
FontSize="20"
Foreground="White">
DEVELOPMENT BOOKS
</Label>
<Label>BOOK
FOR STUDENTS</Label>
<Label>LIST
OF BOOKS:</Label>
<ListBox>
<ListBoxItem>BOOK
1</ListBoxItem>
<ListBoxItem>BOOK
2</ListBoxItem>
<ListBoxItem>BOOK
3</ListBoxItem>
</ListBox>
<StackPanel
Orientation="Horizontal"
HorizontalAlignment="Center">
<Button
MinWidth="75"
Margin="10">Help</Button>
<Button
MinWidth="75"
Margin="10">OK</Button>
</StackPanel>
</StackPanel>
</Window>
Vb Code
Imports
System.Windows
Imports
System.Windows.Input
Imports
System.Windows.Media
Imports
System.Windows.Controls
Partial Public Class AboutDialog
Inherits
Window
Public Sub New()
InitializeComponent()
End Sub
Private Sub
AboutDialog_MouseRightButtonDown(ByVal sender
As Object,
ByVal e As MouseButtonEventArgs)
' Display information about this event
' In this example, all possible sources derive
from Control
Dim source
As Control =
TryCast(e.Source,
Control)
' Toggle the border on the source control
If source.BorderThickness <>
New Thickness(5)
Then
source.BorderThickness = New Thickness(5)
source.BorderBrush = Brushes.Black
Else
source.BorderThickness = New Thickness(0)
End If
End Sub
End Class
Output Window
Conclusion
Hope this article helps you to understand the
Input Events in WPF.