public void Disconnect()
{
// Cancel read thread
m_cancelTokenSource?.Cancel();
// There may not be any received messages and it may be blocked by Read.
// Therefore, send FramebufferUpdate so that the client sends a message.
m_client?.WriteFramebufferUpdateRequest();
// Wait for completion or timeout (5 second).
m_readTask?.Wait(5 * 1000);
// Disconnect
m_client?.DisconnectVnc();
// Execute to draw this control black.
// Without this, the screen will not be updated and the VNC image will remain.
NativeMethods.InvalidateRect(m_handle, (IntPtr)0, false);
}
protected override void OnPaint(PaintEventArgs e)
{
if (DesignMode)
{
e.Graphics.DrawRectangle(Pens.DarkGray, 0, 0, this.Width - 1, this.Height - 1);
}
else
{
if (m_client != null && m_client.Connected)
{
if (m_last.Enable)
{
m_client.WritePointerEvent(m_last.Mask, (UInt16)m_last.X, (UInt16)m_last.Y);
m_lastPointerSendDt = DateTime.Now;
m_last.Enable = false;
}
// NearestNeighbor is the fastest.
e.Graphics.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.NearestNeighbor;
// At the time of connection, the background black is left, so erase it
if (!m_prevConnected)
{
m_prevConnected = true;
e.Graphics.Clear(this.BackColor);
}
// Lock to access below.
// - m_client.InternalCanvas
// - m_encodeList
lock (m_client.CanvasLock)
{
BitmapConverter.ToBitmap(m_client.InternalCanvas, (Bitmap)m_image);
// When the size changes, redraw it all.
// Or if the focus is lost, redraw it all.
if (m_prevSize.Width != this.Width || m_prevSize.Height != this.Height || m_needsRedraw)
{
m_prevSize.Width = this.Width;
m_prevSize.Height = this.Height;
m_needsRedraw = false;
// I could not draw correctly if the size was not an integer ratio.
// Therefore, find the integer ratio that the denominator becomes 10 or less.
m_xZoom = new Fraction(this.Width, m_client.ServerInitBody.FramebufferWidth, 10);
m_yZoom = new Fraction(this.Height, m_client.ServerInitBody.FramebufferHeight, 10);
int width = (int)(m_client.ServerInitBody.FramebufferWidth * m_xZoom.Numerator / m_xZoom.Denominator);
int height = (int)(m_client.ServerInitBody.FramebufferHeight * m_yZoom.Numerator / m_yZoom.Denominator);
// Redraw all
e.Graphics.DrawImage(m_image, 0, 0, width, height);
}
// If the size is the same, draw only the difference.
else
{
foreach (var list in m_encodeList)
{
foreach (var v in list)
{
// To draw correctly, I calculate drawing source rectangle and drawing destination rectangle.
// ex.
// Framebuffer = 640x480
// Control = 320x240
// Source Rectangle(x,y,w,h) = (101, 101, 10, 10)
// => (100, 100, 12, 12) (Convert to be divisible)
// Dest Rectangle(x,y,w,h) => (50, 50, 5, 5)
int newX = (int)(v.X / m_xZoom.Denominator) * m_xZoom.Denominator;
int newY = (int)(v.Y / m_yZoom.Denominator) * m_yZoom.Denominator;
int newW = (int)(Math.Ceiling((double)(v.Width + v.X - newX) / m_xZoom.Denominator) * m_xZoom.Denominator);
int newH = (int)(Math.Ceiling((double)(v.Height + v.Y - newY) / m_yZoom.Denominator) * m_yZoom.Denominator);
int xpos = newX * m_xZoom.Numerator / m_xZoom.Denominator;
int ypos = newY * m_yZoom.Numerator / m_yZoom.Denominator;
int width = newW * m_xZoom.Numerator / m_xZoom.Denominator;
int height = newH * m_yZoom.Numerator / m_yZoom.Denominator;
e.Graphics.DrawImage(m_image, new Rectangle(xpos, ypos, width, height), newX, newY, newW, newH, GraphicsUnit.Pixel);
}
}
m_encodeList.Clear();
}
}
m_client.WriteFramebufferUpdateRequest();
}
else
{
m_prevConnected = false;
e.Graphics.FillRectangle(Brushes.Black, 0, 0, this.Width, this.Height);
}
}
}