public PreviewWindow(string file)
{
BrowseCommand = new BrowseCommand(this);
RefreshCommand = new RefreshCommand(this);
ExitCommand = new ExitCommand(this);
InitializeComponent();
File = file;
interop = new WindowInteropHelper(this);
interop.EnsureHandle();
}
public bool TranslateAccelerator(ref MSG msg)
{
if (msg.message != 0x100)
{
return(false);
}
var vk = msg.wParam.ToInt64();
ModifierKeys modState = ModifierKeys.None;
Dispatcher.Invoke(() => modState = Keyboard.Modifiers);
Action action = null;
try
{
switch (vk)
{
case 0x09:
if ((modState & ModifierKeys.Shift) == ModifierKeys.Shift)
{
action = () => contentPresenter.MoveFocus(new TraversalRequest(FocusNavigationDirection.Previous));
}
else
{
action = () => contentPresenter.MoveFocus(new TraversalRequest(FocusNavigationDirection.Next));
}
return(true);
case 0x42:
if ((modState & (ModifierKeys.Control | ModifierKeys.Alt | ModifierKeys.Shift)) == ModifierKeys.Control)
{
action = () =>
{
BrowseCommand.Execute(null);
contentPresenter.Focus();
};
return(true);
}
return(false);
case 0x74:
if ((modState & (ModifierKeys.Control | ModifierKeys.Alt | ModifierKeys.Shift | ModifierKeys.Windows)) == ModifierKeys.None)
{
action = () =>
{
RefreshCommand.Execute(null);
contentPresenter.Focus();
};
return(true);
}
return(false);
case 0x1b:
if ((modState & (ModifierKeys.Control | ModifierKeys.Alt | ModifierKeys.Shift | ModifierKeys.Windows)) == ModifierKeys.None)
{
action = () => ExitCommand.Execute(null);
return(true);
}
return(false);
default:
return(false);
}
}
finally
{
if (action != null)
{
Dispatcher.InvokeAsync(action, DispatcherPriority.Send);
}
}
}