// In sliverligh there is no readily available change event for DataContext.
// To create it I had to write an interface and a static class.
// Interface contains one method with is implemented below, this
// method is called be the control itself. To made this, I had to
// register my control in static class 'DataContextChangedHelper'(in constructor)
// with call method when DataContext will be changed.
public void DataContextChanged(DownloadListItemControl sender, DependencyPropertyChangedEventArgs e)
{
QueuedDownload model = (DataContext as QueuedDownload);
model.PropertyChanged += OnDownloadedProgressTextChanged;
SetDownloadedProgressText(model);
}
private void SetDownloadedProgressText(QueuedDownload model)
{
if (model.DownloadSize == long.MaxValue)
{
DownloadedProgressText = KIndeterminateDownloadSize;
}
else
{
DownloadedProgressText = String.Format("{0} / {1} kB", model.DownloadedBytes / 1024, model.DownloadSize / 1024);
}
}
private void OnDownloadMenuActivated(object sender, RoutedEventArgs args)
{
MenuItem menuItem = sender as MenuItem;
Debug.Assert(menuItem != null);
QueuedDownload downloadItem = menuItem.CommandParameter as QueuedDownload;
Debug.Assert(downloadItem != null);
switch (menuItem.Tag.ToString())
{
case "Cancel":
App.Engine.CancelDownload(downloadItem);
break;
}
}
private void OnDownloadClicked(object sender, SelectionChangedEventArgs args)
{
if (DownloadsList.SelectedIndex != -1)
{
QueuedDownload clickedDownload = DownloadsList.SelectedItem as QueuedDownload;
Debug.Assert(clickedDownload != null);
// pause/resume download
if (clickedDownload.State == QueuedDownload.DownloadState.Paused || clickedDownload.State == QueuedDownload.DownloadState.Stopped)
{
App.Engine.StartDownload(clickedDownload);
}
else
{
App.Engine.StatisticsManager.LogDownloadEnd(clickedDownload);
App.Engine.StopDownload(clickedDownload);
}
// set selected index to -1 to enable repeated clicks on item
DownloadsList.SelectedIndex = -1;
}
}