WPF

<Canvas Width="300" Height="200" Background="AntiqueWhite" >
    <Image Name="image1" Source="images/Silverlight_Logo.jpg" Stretch="None" MouseLeftButtonDown="image1_MouseLeftButtonDown"  MouseMove="image1_MouseMove" MouseLeftButtonUp="image1_MouseLeftButtonUp" >
        <Image.RenderTransform>
            <TranslateTransform x:Name="imageTransform" X="0" Y="0" />
        </Image.RenderTransform>
    </Image>
</Canvas>

Point anchorPoint;
Point currentPoint;
bool isInDrag = false;

private void image1_MouseLeftButtonDown(object sender, MouseButtonEventArgs e)
{
    FrameworkElement element = sender as FrameworkElement;
    anchorPoint = e.GetPosition(null);
    element.CaptureMouse();
    isInDrag = true;
    e.Handled = true;
}

private void image1_MouseMove(object sender, MouseEventArgs e)
{
    if (isInDrag)
    {
        FrameworkElement element = sender as FrameworkElement;
        currentPoint = e.GetPosition(null);

        imageTransform.X += (currentPoint.X - anchorPoint.X);
        imageTransform.Y += (currentPoint.Y - anchorPoint.Y);

        anchorPoint = currentPoint;
    }
}

private void image1_MouseLeftButtonUp(object sender, MouseButtonEventArgs e)
{
    if (isInDrag)
    {
        FrameworkElement element = sender as FrameworkElement;
        element.ReleaseMouseCapture();
        isInDrag = false;
        e.Handled = true;
    }
}

Mark Salsbery
Microsoft MVP - Visual C++

John Simmons / outlaw programmer wrote:

This is part of Microsoft's ongoing campaign to "Change for the sake of change". Since 1990, we've used an ampersand (&) to indicate an underlined character, but for WPF, they changed it for no apparent reason to an underscore.

Pete O'Hanlon wrote:

They changed it because & isn't valid in XML.

John Simmons / outlaw programmer wrote:

Any Comments?

public partial class Window2 : Window
{
    public Window2()
    {
        InitializeComponent();
    }

    public static DependencyProperty PercentDoneProperty =
                DependencyProperty.Register("PercentDone", typeof(double), typeof(Window2));
    public double PercentDone
    {
        get { return (double)GetValue(PercentDoneProperty); }
        set
        {
            SetValue(PercentDoneProperty, value);
        }
    }

    MyTestClass mtc = new MyTestClass();

    private void progbar_Loaded(object sender, RoutedEventArgs e)
    {
        // This one binds to the dependency property
        progbar.DataContext = this;
        // This one binds to the INotifyPropertyChanged-implemented property
        //progbar.DataContext = mtc;

        DispatcherTimer dispatcherTimer = new DispatcherTimer();
        dispatcherTimer.Tick += new EventHandler(dispatcherTimer_Tick);
        dispatcherTimer.Interval = new TimeSpan(0, 0, 0, 0, 250);
        dispatcherTimer.Start();
    }

    void dispatcherTimer_Tick(object sender, EventArgs e)
    {
        if (PercentDone < 100)
            PercentDone = PercentDone + 1;
        if (mtc.PercentDone < 100)
            mtc.PercentDone = mtc.PercentDone + 1;
    }

}


public class MyTestClass : INotifyPropertyChanged
{
    private double _percentDone = 0;
    public double PercentDone
    {
        get { return _percentDone; }
        set { _percentDone = value; Changed("PercentDone"); }
    }

    #region INotifyPropertyChanged Implementation

    public event PropertyChangedEventHandler PropertyChanged;

    protected virtual void Changed(string propertyName)
    {
        PropertyChangedEventHandler handler = PropertyChanged;
        if (handler != null)
        {
            handler(this, new PropertyChangedEventArgs(propertyName));
        }
    }

    #endregion
}

<Window x:Class="WPFTester.Window2"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:local="clr-namespace:WPFTester"
    Title="Window2" Height="450" Width="500" >
    <Grid >
        <StackPanel >
            <ProgressBar x:Name="progbar" Width="200" Height="20" Value="{Binding Path=PercentDone}" Loaded="progbar_Loaded" /> 
        </StackPanel>
    </Grid>
</Window>

Mark Salsbery
Microsoft MVP - Visual C++

John Simmons / outlaw programmer wrote:

I never found any reference that said I had to do that.

Mark Salsbery
Microsoft MVP - Visual C++