private int zindexBottom = BASE_ZINDEX; // Bottom is decremented when a control is moved to back.
private void AddToCanvas(IHmiControl control, double leftShift = 0, double topShift = 0)
{
control.OwnerPage = this;
SetName(control, control.Name);
Panel.SetZIndex(control.fe, zindexTop++);
Location0.Shift(control.fe, leftShift, topShift);
gridCanvas.Children.Add(control.fe);
}
private void ArrowKeyNudge(Key key, bool ctrl)
{
IHmiControl control = SelectedControl;
double delta = ctrl ? 10 * GridSize : GridSize; // Ctrl+arrows for 10x nudge
double left, left0 = GetLeft(control);
double top, top0 = GetTop(control);
switch (key)
{
case Key.Left: left = Math.Max(left0 - delta, 0); top = top0; break;
case Key.Right: left = left0 + delta; top = top0; break;
case Key.Up: left = left0; top = Math.Max(top0 - delta, 0); break;
case Key.Down: left = left0; top = top0 + delta; break;
default: return;
}
double dx = left - left0, dy = top - top0;
if (dx == 0 && dy == 0) // at the edge
{
SystemSounds.Beep.Play();
return;
}
if ((control.Flags & ECtrlFlags.IsGroup) > 0 && !Keyboard.IsKeyDown(Key.LeftShift) && !Keyboard.IsKeyDown(Key.RightShift))
{
foreach (object child in gridCanvas.Children)
{
if ((child is IHmiControl control2) && IsInside(control2, control))
{
Location0.Shift(control2.fe, dx, dy);
}
}
}
Location0.Shift(control.fe, dx, dy);
if (SelectedControl == control)
{
marker.Margin = control.fe.Margin;
designer.UpdateLocation();
}
}