/// <summary>
/// Processes Windows messages.
/// </summary>
/// <param name="m">The Windows Message to process. </param>
protected override void WndProc(ref Message m)
{
switch (m.Msg)
{
case PI.WM_NCLBUTTONDOWN:
{
// Perform a hit test to determine which area the mouse press is over at the moment
uint result = PI.SendMessage(this.Handle, (int)PI.WM_NCHITTEST, 0, (uint)m.LParam);
// Only want to override the behaviour of moving the window via the caption bar
if (result == PI.HITTEST_CAPTION)
{
// Extract screen position of the mouse from the message LPARAM
Point screenPos = new Point((short)((uint)m.LParam & 0x0000FFFFU),
(short)(uint)(((uint)m.LParam & 0xFFFF0000U) >> 16));
// Find the mouse offset relative to the top left of the window
Point offset = new Point(screenPos.X - Location.X, screenPos.Y - Location.Y);
// Do not intercept message if inside the max/close buttons
if (!HitTestMaxButton(offset) && !HitTestCloseButton(offset))
{
// Capture the mouse until the mouse us is received and gain focus so we look active
Capture = true;
Activate();
// Use event to notify the request to drag the window
OnWindowCaptionDragging(new ScreenAndOffsetEventArgs(screenPos, offset));
// Eat the message!
return;
}
}
}
break;
case PI.WM_KEYDOWN:
base.WndProc(ref m);
if (_floatingMessages != null)
{
_floatingMessages.OnKEYDOWN(ref m);
}
return;
case PI.WM_MOUSEMOVE:
base.WndProc(ref m);
if (_floatingMessages != null)
{
_floatingMessages.OnMOUSEMOVE();
}
return;
case PI.WM_LBUTTONUP:
base.WndProc(ref m);
if (_floatingMessages != null)
{
_floatingMessages.OnLBUTTONUP();
}
return;
}
base.WndProc(ref m);
}
public bool PreFilterMessage(ref Message m)
{
switch (m.Msg)
{
case PI.WM_MOUSELEAVE:
// Only interested in the mouse leave if it relates to the floating window and so ignore any
// message that comes from the mouse leaving the source of a drag such as a docked window or
// a workspace/navigator tab.
if (m.HWnd == FloatingWindow.Handle)
{
// If mouse has left then we need to finish with docking. Most likely reason is the focus
// has been shifted to another application with ALT+TAB.
DragEnd(Control.MousePosition);
Dispose();
}
break;
case PI.WM_KEYDOWN:
{
// Extract the keys being pressed
Keys keys = ((Keys)((int)m.WParam.ToInt64()));
// Pressing escape ends dragging
if (keys == Keys.Escape)
{
DragQuit();
Dispose();
}
return(true);
}
case PI.WM_SYSKEYDOWN:
{
// Extract the keys being pressed
Keys keys = ((Keys)((int)m.WParam.ToInt64()));
// Pressing ALT+TAB ends dragging because user is moving to another app
if (PI.IsKeyDown(Keys.Tab) && ((Control.ModifierKeys & Keys.Alt) == Keys.Alt))
{
DragQuit();
Dispose();
}
break;
}
case PI.WM_MOUSEMOVE:
if (_monitorMouse)
{
// Update feedback to reflect the current mouse position
DragMove(Control.MousePosition);
}
break;
case PI.WM_LBUTTONUP:
if (_monitorMouse)
{
DragEnd(Control.MousePosition);
Dispose();
}
break;
}
return(false);
}
public bool PreFilterMessage(ref Message msg)
{
Form parentForm = this.FindForm();
Form parentMdi = (parentForm != null ? parentForm.MdiParent : null);
// Only interested in snooping messages if....
// The Form we are inside is the active form AND
// If an MDI Child Form then we must be the active MDI Child Form AND
// We are not in the hidden state AND
// We have an associated auto hidden group control that is not disposed AND
// We are not disposed
if ((parentForm != null) && ((parentForm == Form.ActiveForm) || (parentMdi != null && parentMdi.ActiveMdiChild == parentForm)) &&
parentForm.ContainsFocus && (_state != DockingAutoHiddenShowState.Hidden) && (_group != null) && !_group.IsDisposed && !IsDisposed)
{
switch (msg.Msg)
{
case PI.WM_KEYDOWN:
// Pressing escape removes the auto hidden window
if ((int)msg.WParam == PI.VK_ESCAPE)
{
MakeHidden();
return(true);
}
break;
case PI.WM_MOUSELEAVE:
// If the mouse is leaving a control then we start the dismiss timer so that a mouse move is required
// to cancel the mouse move and prevent the actual dismissal occuring. The exception to this is if the
// slide out dockspace has the focus, in which case we do nothing.
if (!_dismissRunning && !DockspaceControl.ContainsFocus)
{
_dismissTimer.Stop();
_dismissTimer.Start();
_dismissRunning = true;
}
break;
case PI.WM_MOUSEMOVE:
// Convert the mouse position into a screen location
Point screenPt = CommonHelper.ClientMouseMessageToScreenPt(msg);
// Is the mouse over ourself or over the associated auto hiiden group
if (RectangleToScreen(ClientRectangle).Contains(screenPt) ||
_group.RectangleToScreen(_group.ClientRectangle).Contains(screenPt))
{
// We do not dismiss while the mouse is over ourself
if (_dismissRunning)
{
_dismissTimer.Stop();
_dismissRunning = false;
}
}
else
{
// When mouse not over a relevant area we need to start the dismiss process
// unless the slide out dockspace has the focus, in which case we do nothing.
if (!_dismissRunning && !DockspaceControl.ContainsFocus)
{
_dismissTimer.Stop();
_dismissTimer.Start();
_dismissRunning = true;
}
}
// If first message for this window then need to track to get the mouse leave
if (_mouseTrackWindow != msg.HWnd)
{
_mouseTrackWindow = msg.HWnd;
// This structure needs to know its own size in bytes
PI.TRACKMOUSEEVENTS tme = new PI.TRACKMOUSEEVENTS();
tme.cbSize = (uint)Marshal.SizeOf(typeof(PI.TRACKMOUSEEVENTS));
tme.dwHoverTime = 100;
tme.dwFlags = (int)(PI.TME_LEAVE);
tme.hWnd = Handle;
// Call Win32 API to start tracking
PI.TrackMouseEvent(ref tme);
}
break;
}
}
return(false);
}
