/// <summary>
/// Hide popup menu and all child menus.
/// </summary>
public virtual void Hide()
{
if (!Visible)
{
return;
}
// Lock update
IsLayoutLocked = true;
// Close child
HideChild();
// Unlink from window
Parent = null;
// Close window
if (_window != null)
{
var win = _window;
_window = null;
win.Close();
}
// Unlink from parent
if (_parentCM != null)
{
_parentCM._childCM = null;
_parentCM = null;
}
// Hide
Visible = false;
OnHide();
}
/// <summary>
/// Hides child popup menu if any opened.
/// </summary>
public void HideChild()
{
if (_childCM != null)
{
_childCM.Hide();
_childCM = null;
}
}
/// <summary>
/// Shows new child context menu.
/// </summary>
/// <param name="child">The child menu.</param>
/// <param name="location">The child menu initial location.</param>
/// <param name="isSubMenu">True if context menu is a normal sub-menu, otherwise it is a custom menu popup linked as child.</param>
public void ShowChild(ContextMenuBase child, Vector2 location, bool isSubMenu = true)
{
// Hide current child
HideChild();
// Set child
_childCM = child;
_childCM._parentCM = this;
_childCM._isSubMenu = isSubMenu;
// Show child
_childCM.Show(this, location);
}
/// <summary>
/// Show context menu over given control.
/// </summary>
/// <param name="parent">Parent control to attach to it.</param>
/// <param name="location">Popup menu origin location in parent control coordinates.</param>
public virtual void Show(Control parent, Vector2 location)
{
Assert.IsNotNull(parent);
// Ensure to be closed
Hide();
// Peek parent control window
var parentWin = parent.RootWindow;
if (parentWin == null)
{
return;
}
// Check if show menu inside the other menu - then link as a child to prevent closing the calling menu window on lost focus
if (_parentCM == null && parentWin.ChildrenCount == 1 && parentWin.Children[0] is ContextMenuBase parentCM)
{
parentCM.ShowChild(this, parentCM.ScreenToClient(parent.ClientToScreen(location)), false);
return;
}
// Unlock and perform controls update
UnlockChildrenRecursive();
PerformLayout();
// Calculate popup direction and initial location (fit on a single monitor)
var dpiScale = Platform.DpiScale;
Vector2 dpiSize = Size * dpiScale;
Vector2 locationWS = parent.PointToWindow(location);
Vector2 locationSS = parentWin.ClientToScreen(locationWS * dpiScale);
Location = Vector2.Zero;
Rectangle monitorBounds = Platform.GetMonitorBounds(locationSS);
Vector2 rightBottomLocationSS = locationSS + dpiSize;
bool isUp = false, isLeft = false;
if (monitorBounds.Bottom < rightBottomLocationSS.Y)
{
// Direction: up
isUp = true;
locationSS.Y -= dpiSize.Y;
}
if (monitorBounds.Right < rightBottomLocationSS.X)
{
// Direction: left
isLeft = true;
locationSS.X -= dpiSize.X;
}
// Update direction flag
if (isUp)
{
_direction = isLeft ? ContextMenuDirection.LeftUp : ContextMenuDirection.RightUp;
}
else
{
_direction = isLeft ? ContextMenuDirection.LeftDown : ContextMenuDirection.RightDown;
}
// Create window
var desc = CreateWindowSettings.Default;
desc.Position = locationSS;
desc.StartPosition = WindowStartPosition.Manual;
desc.Size = dpiSize;
desc.Fullscreen = false;
desc.HasBorder = false;
desc.SupportsTransparency = false;
desc.ShowInTaskbar = false;
desc.ActivateWhenFirstShown = true;
desc.AllowInput = true;
desc.AllowMinimize = false;
desc.AllowMaximize = false;
desc.AllowDragAndDrop = false;
desc.IsTopmost = true;
desc.IsRegularWindow = false;
desc.HasSizingFrame = false;
_window = Platform.CreateWindow(ref desc);
_window.LostFocus += OnWindowLostFocus;
// Attach to the window
_parentCM = parent as ContextMenuBase;
Parent = _window.GUI;
// Show
Visible = true;
if (_window == null)
{
return;
}
_window.Show();
PerformLayout();
Focus();
OnShow();
}
