public VisiCalcFormBase()
{
_formSystemLayer = new FormSystemLayer(this, new NuGenWndProcDelegate(this.RealWndProc));
this.Controls.Add(_formSystemLayer);
_formSystemLayer.Visible = false;
DecideOpacitySetting();
this.ResumeLayout(false);
}
private FormSystemLayer FindFormSystemLayer(Form host)
{
if (host != null)
{
Control.ControlCollection controls = host.Controls;
for (Int32 i = 0; i < controls.Count; ++i)
{
FormSystemLayer formSystemLayer = controls[i] as FormSystemLayer;
if (formSystemLayer != null)
{
return(formSystemLayer);
}
}
}
return(null);
}
/// <summary>
/// Manages some special handling of window messages.
/// </summary>
/// <param name="m"></param>
/// <returns>true if the message was handled, false if the caller should handle the message.</returns>
public Boolean HandleParentWndProc(ref Message m)
{
Boolean returnVal = true;
switch (m.Msg)
{
case WinUser.WM_NCPAINT:
{
goto default;
}
case WinUser.WM_NCACTIVATE:
{
if (_forceActiveTitleBar && m.WParam == IntPtr.Zero)
{
if (_ignoreNcActivate > 0)
{
--_ignoreNcActivate;
goto default;
}
else if (Form.ActiveForm != _host || // Gets rid of: if you have the form active, then click on the desktop --> desktop refreshes
!_host.Visible) // Gets rid of: desktop refresh on exit
{
goto default;
}
else
{
_parentWndProc(ref m);
User32.SendMessage(
_host.Handle
, WinUser.WM_NCACTIVATE
, new IntPtr(1)
, IntPtr.Zero
);
break;
}
}
else
{
goto default;
}
}
case WinUser.WM_ACTIVATE:
{
goto default;
}
case WinUser.WM_ACTIVATEAPP:
{
_parentWndProc(ref m);
}
// Check if the app is being deactivated
if (_forceActiveTitleBar && m.WParam == IntPtr.Zero)
{
// If so, put our titlebar in the inactive state
User32.PostMessage(_host.Handle, WinUser.WM_NCACTIVATE,
IntPtr.Zero, IntPtr.Zero);
++_ignoreNcActivate;
}
if (m.WParam == new IntPtr(1))
{
foreach (Form childForm in _host.OwnedForms)
{
FormSystemLayer childFormEx = FindFormSystemLayer(childForm);
if (childFormEx != null)
{
if (childFormEx.ForceActiveTitleBar && childForm.IsHandleCreated)
{
User32.PostMessage(
childForm.Handle
, WinUser.WM_NCACTIVATE
, new IntPtr(1)
, IntPtr.Zero
);
}
}
}
FormSystemLayer ownerEx = FindFormSystemLayer(_host.Owner);
if (ownerEx != null)
{
if (ownerEx.ForceActiveTitleBar && _host.Owner.IsHandleCreated)
{
User32.PostMessage(
_host.Owner.Handle
, WinUser.WM_NCACTIVATE
, new IntPtr(1)
, IntPtr.Zero
);
}
}
}
break;
default:
returnVal = false;
break;
}
GC.KeepAlive(_host);
return(returnVal);
}
public VisiCalcFormBase()
{
_formSystemLayer = new FormSystemLayer(this, new NuGenWndProcDelegate(this.RealWndProc));
this.Controls.Add(_formSystemLayer);
_formSystemLayer.Visible = false;
DecideOpacitySetting();
this.ResumeLayout(false);
}