/// <summary>
/// One of the controls has changed its location in the filesystem.
/// This method is invoked to synchronize this change with all other controls.
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void FolderTextPath_BrowseEvent(object sender,
FileSystemModels.Browse.BrowsingEventArgs e)
{
var location = e.Location;
SelectedFolder = location.Path;
if (e.IsBrowsing == false && e.Result == BrowseResult.Complete)
{
NavigateToFolder(location);
}
else
{
if (e.IsBrowsing == true)
{
// The sender has messaged: "I am chnaging location..."
// So, we set this property to tell the others:
// 1) Don't change your location now (eg.: Disable UI)
// 2) We'll be back to tell you the location when we know it
if (TreeBrowser != sender)
{
TreeBrowser.SetExternalBrowsingState(true);
}
if (FolderTextPath != sender)
{
FolderTextPath.SetExternalBrowsingState(true);
}
if (FolderItemsView != sender)
{
FolderItemsView.SetExternalBrowsingState(true);
}
}
}
}
/// <summary>
/// Master controler interface method to navigate all views
/// to the folder indicated in <paramref name="folder"/>
/// - updates all related viewmodels.
/// </summary>
/// <param name="request"></param>
private async Task <FinalBrowseResult> NavigateToFolderAsync(BrowseRequest request,
object sender)
{
// Make sure the task always processes the last input but is not started twice
await _SlowStuffSemaphore.WaitAsync();
try
{
var newPath = request.NewLocation;
var cancel = request.CancelTok;
if (cancel != null)
{
cancel.ThrowIfCancellationRequested();
}
TreeBrowser.SetExternalBrowsingState(true);
FolderItemsView.SetExternalBrowsingState(true);
FolderTextPath.SetExternalBrowsingState(true);
FinalBrowseResult browseResult = null;
// Navigate TreeView to this file system location
if (TreeBrowser != sender)
{
browseResult = await TreeBrowser.NavigateToAsync(request);
if (cancel != null)
{
cancel.ThrowIfCancellationRequested();
}
if (browseResult.Result != BrowseResult.Complete)
{
return(FinalBrowseResult.FromRequest(request, BrowseResult.InComplete));
}
}
// Navigate Folder ComboBox to this folder
if (FolderTextPath != sender)
{
browseResult = await FolderTextPath.NavigateToAsync(request);
if (cancel != null)
{
cancel.ThrowIfCancellationRequested();
}
if (browseResult.Result != BrowseResult.Complete)
{
return(FinalBrowseResult.FromRequest(request, BrowseResult.InComplete));
}
}
if (cancel != null)
{
cancel.ThrowIfCancellationRequested();
}
// Navigate Folder/File ListView to this folder
if (FolderItemsView != sender)
{
browseResult = await FolderItemsView.NavigateToAsync(request);
if (cancel != null)
{
cancel.ThrowIfCancellationRequested();
}
if (browseResult.Result != BrowseResult.Complete)
{
return(FinalBrowseResult.FromRequest(request, BrowseResult.InComplete));
}
}
if (browseResult != null)
{
if (browseResult.Result == BrowseResult.Complete)
{
SelectedFolder = newPath.Path;
// Log location into history of recent locations
NaviHistory.Forward(newPath);
}
}
return(browseResult);
}
catch (Exception exp)
{
var result = FinalBrowseResult.FromRequest(request, BrowseResult.InComplete);
result.UnexpectedError = exp;
return(result);
}
finally
{
TreeBrowser.SetExternalBrowsingState(true);
FolderItemsView.SetExternalBrowsingState(false);
FolderTextPath.SetExternalBrowsingState(false);
_SlowStuffSemaphore.Release();
}
}
