Respond When the User Rotates the Mouse Wheel : Mouse « Windows Presentation Foundation « C# / CSharp Tutorial

1. C# / CSharp Tutorial
2. Windows Presentation Foundation
3. Mouse

<Window x:Class="WpfApplication1.Window1"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    Title="WPF" Height="300" Width="300">
    <Canvas>
        <Slider Canvas.Top="10" Canvas.Left="20" Name="sldSlider" 
                Minimum="0" Maximum="1000" Value="500"
                Width="250" MouseWheel="Slider_MouseWheel"/>
        <RichTextBox Canvas.Top="50" Canvas.Left="20" Width="250" Height="100" VerticalScrollBarVisibility="Visible">
            <FlowDocument>
                <List>
                    <ListItem>
                        <Paragraph>
                            <Bold>Bold List Item</Bold>
                        </Paragraph>
                    </ListItem>
                    <ListItem>
                        <Paragraph>
                            <Italic>Italic List Item</Italic>
                        </Paragraph>
                    </ListItem>
                    <ListItem>
                        <Paragraph>
                            <Underline>Underlined List Item</Underline>
                        </Paragraph>
                    </ListItem>
                </List>
                <List>
                    <ListItem>
                        <Paragraph>
                            <Bold>Bold List Item</Bold>
                        </Paragraph>
                    </ListItem>
                    <ListItem>
                        <Paragraph>
                            <Italic>Italic List Item</Italic>
                        </Paragraph>
                    </ListItem>
                    <ListItem>
                        <Paragraph>
                            <Underline>Underlined List Item</Underline>
                        </Paragraph>
                    </ListItem>
                </List>
                <List>
                    <ListItem>
                        <Paragraph>
                            <Bold>Bold List Item</Bold>
                        </Paragraph>
                    </ListItem>
                    <ListItem>
                        <Paragraph>
                            <Italic>Italic List Item</Italic>
                        </Paragraph>
                    </ListItem>
                    <ListItem>
                        <Paragraph>
                            <Underline>Underlined List Item</Underline>
                        </Paragraph>
                    </ListItem>
                </List>
                <Paragraph FontSize="12">
                    Lorem ipsum dolor sit amet, consectetuer adipiscing elit, 
                    sed diam nonummy nibh euismod tincidunt ut laoreet dolore 
                    magna aliquam erat volutpat.
                </Paragraph>
                <Paragraph FontSize="15">
                    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 FontSize="18">A List</Paragraph>
                <List>
                    <ListItem>
                        <Paragraph>
                            <Bold>Bold List Item</Bold>
                        </Paragraph>
                    </ListItem>
                    <ListItem>
                        <Paragraph>
                            <Italic>Italic List Item</Italic>
                        </Paragraph>
                    </ListItem>
                    <ListItem>
                        <Paragraph>
                            <Underline>Underlined List Item</Underline>
                        </Paragraph>
                    </ListItem>
                </List>
            </FlowDocument>
        </RichTextBox>
        <Rectangle Canvas.Top="160" Canvas.Left="20" Name="shpRectangle"
                   Fill="LightBlue" Width="50" Height="50" 
                   MouseWheel="Rectangle_MouseWheel">
        </Rectangle>
    </Canvas>
</Window>
//File:Window.xaml.cs

using System.Windows;
using System.Windows.Input;

namespace WpfApplication1
{
    public partial class Window1 : Window
    {
        public Window1()
        {
            InitializeComponent();
        }
        private void Slider_MouseWheel(object sender, MouseWheelEventArgs e)
        {
            sldSlider.Value += (e.Delta > 0) ? 5 : -5;
        }
        private void Rectangle_MouseWheel(object sender, MouseWheelEventArgs e)
        {
            if (e.LeftButton == MouseButtonState.Pressed)
            {
                double newWidth = shpRectangle.Width += (e.Delta > 0) ? 5 : -5;
                if (newWidth < 10) newWidth = 10;
                if (newWidth > 200) newWidth = 200;

                shpRectangle.Width = newWidth;
            }else{
                double newHeight = shpRectangle.Height += (e.Delta > 0) ? 5 : -5;
                if (newHeight < 10) newHeight = 10;
                if (newHeight > 200) newHeight = 200;
                shpRectangle.Height = newHeight;
            }
        }
    }
}

24.123.Mouse
	24.123.1.	A line which monitors the mouse entering its area
	24.123.2.	Respond When the User Rotates the Mouse Wheel
	24.123.3.	Mouse Position and TranslateTransform
	24.123.4.	Mouse Position
	24.123.5.	Detect whether the mouse button is pressed or released using the MouseButtonState property.
	24.123.6.	Handler MouseLeftButtonDown and MouseLeftButtonUp events
	24.123.7.	Mouse Enter and leave a Border
	24.123.8.	Make an object follow the mouse pointer as it moves on the screen.
	24.123.9.	Use Mouse.AddPreviewMouseDownHandler(myEllipse, PreviewMouseDownEllipse);
	24.123.10.	Use Mouse.AddMouseDownHandler(myEllipse, MouseDownEllipse);
	24.123.11.	Use Mouse.PreviewMouseDown /Mouse.MouseDown Attribute from Grid element
	24.123.12.	Grid MouseMove
	24.123.13.	Grid MouseLeftButtonDown
	24.123.14.	Grid MouseLeftButtonUp
	24.123.15.	UI Element Mouse Clicked Events
	24.123.16.	Handles the MouseDown event on the Canvas
	24.123.17.	Handles the MouseDown event on the UniformGrid
	24.123.18.	Mouse cursor override and clear
	24.123.19.	Check the mouse event source
	24.123.20.	Use the Mouse Wheel action methods that are defined by the IScrollInfo interface
	24.123.21.	Mouse.LostMouseCaptureEvent
	24.123.22.	Use Mouse.Capture to let a Control capture an event
	24.123.23.	Capture Mouse Ellipse
	24.123.24.	Get mouse position with Mouse.GetPosition
	24.123.25.	Point Hit Test
	24.123.26.	Replease mouse with Mouse.Capture(null)
	24.123.27.	Hit Result Behavior
	24.123.28.	Get mouse clicked position as Point class
	24.123.29.	Get mouse clicked position with MouseButtonEventArgs.GetPosition