//TODO
// This event handler deals with Frambebuffer Updates coming from the host. An
// EncodedRectangle object is passed via the VncEventArgs (actually an IDesktopUpdater
// object so that *only* Draw() can be called here--Decode() is done elsewhere).
// The VncClient object handles thread marshalling onto the UI thread.
protected void VncUpdate(object sender, VncEventArgs e)
{
try
{
e.DesktopUpdater.Draw(desktop);
}
catch
{
throw;
}
// Before Invalidating the control, specify the rectangle that needs to be
// re-painted. This speeds OnPaint dramatically, since the rest of the
// screen doesn't need to change. Also, adjust the invalidated rectangle
// to accomodate scrolling or centering, since the desktop will either be
// clipped or centered on the screen.
int x, y;
//int desktopImageWidth = (int)(desktop.Size.Width * ScaleX);
//int desktopImageHeight = (int)(desktop.Size.Height * ScaleY);
int desktopImageWidth = ClientSize.Width;
int desktopImageHeight = ClientSize.Height;
// определим - то что нужно апдейтить вообще попадает в видимую часть
Rectangle newUpdateRectangle = e.DesktopUpdater.UpdateRectangle;
if (ShownRectangle.IntersectsWith(newUpdateRectangle))
{
newUpdateRectangle.Intersect(ShownRectangle);
if (newUpdateRectangle.IsEmpty) return;
}
else
{
return;
}
//if (ClientSize.Width > desktopImageWidth)
//{
// int dx = (ClientRectangle.Width - desktopImageWidth) / 2;
// x = (int)(e.DesktopUpdater.UpdateRectangle.X * ScaleX) + dx;
//}
//else
//{
// x = (int)(e.DesktopUpdater.UpdateRectangle.X * ScaleX) + AutoScrollPosition.X;
//}
//if (ClientSize.Height > desktopImageHeight)
//{
// int dy = (ClientRectangle.Height - desktopImageHeight) / 2;
// y = (int)(e.DesktopUpdater.UpdateRectangle.Y * ScaleY) + dy;
//}
//else
//{
// y = (int)(e.DesktopUpdater.UpdateRectangle.Y * ScaleY) + AutoScrollPosition.Y;
//}
x = (int)((newUpdateRectangle.Left - ShownRectangle.Left) * ScaleX);
y = (int)((newUpdateRectangle.Top - ShownRectangle.Top) * ScaleY);
int width = (int) (newUpdateRectangle.Width * ScaleX);
int height = (int)(newUpdateRectangle.Height * ScaleY);
Rectangle adjusted = new Rectangle(x, y, width, height);
//Rectangle adjusted = new Rectangle(x,
// y,
// (int)(e.DesktopUpdater.UpdateRectangle.Width * ScaleX),
// (int)(e.DesktopUpdater.UpdateRectangle.Height * ScaleY));
//if (ClientSize.Width > desktop.Size.Width)
//{
// int dx = (ClientRectangle.Width - desktop.Width) / 2;
// x = e.DesktopUpdater.UpdateRectangle.X + dx;
//}
//else
//{
// x = e.DesktopUpdater.UpdateRectangle.X + AutoScrollPosition.X;
//}
//if (ClientSize.Height > desktop.Size.Height)
//{
// int dy = (ClientRectangle.Height - desktop.Height) / 2;
// y = e.DesktopUpdater.UpdateRectangle.Y + dy;
//}
//else
//{
// y = e.DesktopUpdater.UpdateRectangle.Y + AutoScrollPosition.Y;
//}
//Rectangle adjusted = new Rectangle(x,
// y,
// e.DesktopUpdater.UpdateRectangle.Width,
// e.DesktopUpdater.UpdateRectangle.Height);
Invalidate(adjusted, true);
//Invalidate();
if (state == RuntimeState.Connected) {
vnc.RequestScreenUpdate( fullScreenRefresh);
// Make sure the next screen update is incremental
fullScreenRefresh = false;
}
}
/// <summary>
/// Worker thread lives here and processes protocol messages infinitely, triggering events or other actions as necessary.
/// </summary>
private void GetRfbUpdates()
{
int rectangles;
int enc;
// Get the initial destkop from the host
RequestScreenUpdate(true);
while (true)
{
if (CheckIfThreadDone())
break;
try
{
switch (rfb.ReadServerMessageType())
{
case RfbProtocol.FRAMEBUFFER_UPDATE:
rectangles = rfb.ReadFramebufferUpdate();
if (CheckIfThreadDone())
{
break;
}
for (int i = 0; i < rectangles; ++i)
{
// Get the update rectangle's info
Rectangle rectangle;
EncodedRectangle er;
rfb.ReadFramebufferUpdateRectHeader(out rectangle, out enc);
// Build a derived EncodedRectangle type and pull-down all the pixel info
er = factory.Build(rectangle, enc);
er.Decode();
// Let the UI know that an updated rectangle is available, but check
// to see if the user closed things down first.
if (!CheckIfThreadDone() && VncUpdate != null)
{
VncEventArgs e = new VncEventArgs(er);
// In order to play nicely with WinForms controls, we do a check here to
// see if it is necessary to synchronize this event with the UI thread.
if (VncUpdate.Target is System.Windows.Forms.Control)
{
Control target = VncUpdate.Target as Control;
if (target != null)
{
target.Invoke(VncUpdate, new object[] { this, e });
}
}
else
{
// Target is not a WinForms control, so do it on this thread...
VncUpdate(this, new VncEventArgs(er));
}
}
}
break;
case RfbProtocol.BELL:
Beep(500, 300); // TODO: are there better values than these?
break;
case RfbProtocol.SERVER_CUT_TEXT:
if (CheckIfThreadDone())
{
break;
}
Clipboard.SetDataObject(rfb.ReadServerCutText().Replace("\n", Environment.NewLine), true);
break;
case RfbProtocol.SET_COLOUR_MAP_ENTRIES:
// TODO: Needs to be implemented fully
// rfb.ReadColourMapEntry();
break;
}
}
catch
{
OnConnectionLost();
}
}
}
