|
protected GetNavigationSourceRectangle ( ) : |
||
| Результат | ||
/// <summary>
/// If a key down event is unhandled, this will attempt to handle it by navigating or scrolling.
/// </summary>
/// <param name="control"></param>
/// <param name="e"></param>
static void OnWindowlessUnhandledKeyDown(Control control, KeyEventArgs e)
{
if (e.Handled)
{
return;
}
WindowlessControlHost host = control as WindowlessControlHost;
switch (e.KeyCode)
{
case Keys.F19:
case Keys.F20:
case Keys.Up:
case Keys.Down:
case Keys.Left:
case Keys.Right:
{
// attempt to navigate first
Point p = WindowlessPointToForm(control, Point.Empty);
Rectangle sourceRect;
if (host != null)
{
sourceRect = host.GetNavigationSourceRectangle();
}
else
{
sourceRect = new Rectangle(0, 0, control.Width, control.Height);
}
Rectangle rect = sourceRect;
rect.X += p.X;
rect.Y += p.Y;
Control bestControl = null;
Control topLevelControl = FormlessTopLevelControl(control);
if (e.KeyCode == Keys.F19 || e.KeyCode == Keys.F20)
{
Control previous = null;
Control next = null;
bool found = false;
RecurseControls(topLevelControl, (current) =>
{
if (current == control)
{
found = true;
return(true);
}
if (!IsFocusable(current))
{
return(true);
}
if (!found)
{
previous = current;
}
next = current;
return(!found);
},
null);
if (e.KeyCode == Keys.F19)
{
bestControl = previous;
}
else
{
bestControl = next;
}
//WindowlessNavigateEventArgs ne = new WindowlessNavigateEventArgs(control,
}
else
{
ulong bestScore;
bestControl = GetBestNavigationHost(rect, e.KeyCode, topLevelControl, control, out bestScore);
}
WindowlessNavigateEventArgs ne = new WindowlessNavigateEventArgs(control, sourceRect, e.KeyCode, bestControl);
Control parent = control;
while (parent != null)
{
WindowlessControlHost parentHost = parent as WindowlessControlHost;
if (parentHost != null)
{
parentHost.OnWindowlessNavigate(control, ne);
}
parent = parent.Parent;
}
if (ne.Destination != null && ne.Destination != control)
{
WindowlessControlHost destHost = ne.Destination as WindowlessControlHost;
if (destHost != null)
{
WindowlessControlHost reportChain = destHost;
while (reportChain != null)
{
reportChain.OnWindowlessNavigatingTo(destHost, ne);
reportChain = reportChain.Parent as WindowlessControlHost;
}
}
if (ne.Destination != null)
{
e.Handled = true;
// focus causes problems if this is not actually on a form
if (topLevelControl is Form)
{
ne.Destination.Focus();
}
}
}
const int scrollSpeed = 8;
// now attempt to scroll
parent = control;
while (!e.Handled && parent != null)
{
ScrollableControl scrollControl = parent as ScrollableControl;
if (scrollControl != null)
{
// see if we want to scroll this window
if (scrollControl.AutoScroll && !e.Handled)
{
int left = Int32.MaxValue;
int top = Int32.MaxValue;
int right = Int32.MinValue;
int bottom = Int32.MinValue;
foreach (Control childControl in scrollControl.Controls)
{
left = Math.Min(left, childControl.Left);
top = Math.Min(top, childControl.Top);
bottom = Math.Max(bottom, childControl.Bottom);
right = Math.Max(right, childControl.Right);
}
Point oldPos = scrollControl.AutoScrollPosition;
if (e.KeyCode == Keys.Down && bottom > scrollControl.ClientSize.Height)
{
scrollControl.AutoScrollPosition = new Point(Math.Abs(scrollControl.AutoScrollPosition.X), Math.Min(Math.Abs(scrollControl.AutoScrollPosition.Y) + scrollSpeed, Math.Abs(scrollControl.AutoScrollPosition.Y) + (bottom - scrollControl.ClientSize.Height)));
}
if (e.KeyCode == Keys.Up && scrollControl.AutoScrollPosition.Y < 0)
{
scrollControl.AutoScrollPosition = new Point(Math.Abs(scrollControl.AutoScrollPosition.X), Math.Max(0, Math.Abs(scrollControl.AutoScrollPosition.Y) - scrollSpeed));
}
if (e.KeyCode == Keys.Right && right > scrollControl.ClientSize.Width)
{
scrollControl.AutoScrollPosition = new Point(Math.Min(Math.Abs(scrollControl.AutoScrollPosition.X) + scrollSpeed, Math.Abs(scrollControl.AutoScrollPosition.X) + (right - scrollControl.ClientSize.Width)), Math.Abs(scrollControl.AutoScrollPosition.Y));
}
if (e.KeyCode == Keys.Left && scrollControl.AutoScrollPosition.X < 0)
{
scrollControl.AutoScrollPosition = new Point(Math.Max(0, Math.Abs(scrollControl.AutoScrollPosition.X) - scrollSpeed), Math.Abs(scrollControl.AutoScrollPosition.Y));
}
e.Handled = scrollControl.AutoScrollPosition != oldPos;
}
}
parent = parent.Parent;
}
}
break;
}
}
