protected override void OnMouseDown(MouseEventArgs e)
{
base.OnMouseDown(e);
if (e.Button == MouseButtons.Left && DockPane.DockPanel.AllowEndUserDocking && DockPane.AllowDockDragAndDrop && !DockHelper.IsDockStateAutoHide(DockPane.DockState) && DockPane.ActiveContent != null)
{
DockPane.DockPanel.BeginDrag(DockPane);
}
}
internal void SetDockState(bool isHidden, DockState visibleState, DockPane oldPane)
{
if (!IsSuspendSetDockState)
{
if (DockPanel == null && visibleState != 0)
{
throw new InvalidOperationException(Strings.DockContentHandler_SetDockState_NullPanel);
}
int num;
switch (visibleState)
{
default:
num = (IsDockStateValid(visibleState) ? 1 : 0);
break;
case DockState.Unknown:
num = 1;
break;
case DockState.Hidden:
num = 0;
break;
}
if (num == 0)
{
throw new InvalidOperationException(Strings.DockContentHandler_SetDockState_InvalidState);
}
DockPanel dockPanel = DockPanel;
dockPanel?.SuspendLayout(allWindows: true);
SuspendSetDockState();
DockState dockState = DockState;
if (m_isHidden != isHidden || dockState == DockState.Unknown)
{
m_isHidden = isHidden;
}
m_visibleState = visibleState;
m_dockState = (isHidden ? DockState.Hidden : visibleState);
if (visibleState == DockState.Unknown)
{
Pane = null;
}
else
{
m_isFloat = (m_visibleState == DockState.Float);
if (Pane == null)
{
Pane = DockPanel.DockPaneFactory.CreateDockPane(Content, visibleState, show: true);
}
else if (Pane.DockState != visibleState)
{
if (Pane.Contents.Count == 1)
{
Pane.SetDockState(visibleState);
}
else
{
Pane = DockPanel.DockPaneFactory.CreateDockPane(Content, visibleState, show: true);
}
}
}
if (Form.ContainsFocus && (DockState == DockState.Hidden || DockState == DockState.Unknown))
{
DockPanel.ContentFocusManager.GiveUpFocus(Content);
}
SetPaneAndVisible(Pane);
if (oldPane != null && !oldPane.IsDisposed && dockState == oldPane.DockState)
{
RefreshDockPane(oldPane);
}
if (Pane != null && DockState == Pane.DockState && (Pane != oldPane || (Pane == oldPane && dockState != oldPane.DockState)) && (Pane.DockWindow == null || Pane.DockWindow.Visible || Pane.IsHidden) && !Pane.IsAutoHide)
{
RefreshDockPane(Pane);
}
if (dockState != DockState)
{
if (DockState == DockState.Hidden || DockState == DockState.Unknown || DockHelper.IsDockStateAutoHide(DockState))
{
DockPanel.ContentFocusManager.RemoveFromList(Content);
}
else
{
DockPanel.ContentFocusManager.AddToList(Content);
}
OnDockStateChanged(EventArgs.Empty);
}
ResumeSetDockState();
dockPanel?.ResumeLayout(performLayout: true, allWindows: true);
}
}