/// <summary>
/// Called when the <see cref="Content"/> was exchanged.
/// </summary>
/// <param name="newContent">The new content.</param>
/// <param name="oldContent">The old content.</param>
protected virtual void OnContentChanged(UIControl newContent, UIControl oldContent)
{
if (oldContent != null)
{
VisualChildren.Remove(oldContent);
}
if (newContent != null)
{
// Apply ContentStyle to Content.
if (IsLoaded && !string.IsNullOrEmpty(ContentStyle))
{
newContent.Style = ContentStyle;
}
VisualChildren.Add(newContent);
}
InvalidateMeasure();
}
/// <summary>
/// Opens a window and returns without waiting for the newly opened window to close.
/// </summary>
/// <param name="owner">
/// The owner of this window. If this window is closed, the focus moves back to the owner. Must
/// not be <see langword="null"/>.
/// </param>
/// <remarks>
/// The window is added to the <see cref="UIScreen"/> of the <paramref name="owner"/>
/// (unless it was already added to a screen) and activated (see <see cref="Activate"/>).
/// <see cref="DialogResult"/> is reset to <see langword="null"/>.
/// </remarks>
/// <exception cref="ArgumentNullException">
/// <paramref name="owner"/> is <see langword="null"/>.
/// </exception>
/// <exception cref="ArgumentException">
/// <paramref name="owner"/> is not loaded. The owner needs to be a visible control.
/// </exception>
public void Show(UIControl owner)
{
if (owner == null)
throw new ArgumentNullException("owner");
var screen = owner.Screen;
if (screen == null)
throw new ArgumentException("Invalid owner. Owner must be loaded.", "owner");
Owner = owner;
// Make visible and add to screen.
IsVisible = true;
if (VisualParent == null)
screen.Children.Add(this);
Activate();
DialogResult = null;
#else
DialogResult = false;
}
protected override void OnHandleInput(InputContext context)
{
var screen = Screen;
var inputService = InputService;
var uiService = UIService;
bool mouseOrTouchWasHandled = inputService.IsMouseOrTouchHandled;
UIControl oldFocusedControl = screen.FocusManager.FocusedControl;
if (mouseOrTouchWasHandled && _setSpecialCursor)
{
// This window has changed the cursor in the last frame, but in this frame another
// window has the mouse.
// Minor problem: If the other window has also changed the cursor, then we remove
// its special cursor. But this case should be rare.
uiService.Cursor = null;
_setSpecialCursor = false;
}
// Continue resizing and dragging if already in progress.
ContinueResizeAndDrag(context);
base.OnHandleInput(context);
if (!IsLoaded)
return;
// Handling of activation is very complicated. For example: The window is clicked, but
// a context menu is opened by this click. And there are other difficult cases... Horror!
if (!mouseOrTouchWasHandled)
{
// The mouse was not handled by any control that handled input before this window;
if (!screen.IsFocusWithin // Nothing in window is focused.
|| IsFocusWithin // This window is focused.
|| oldFocusedControl == screen.FocusManager.FocusedControl) // The focus was not changed by a visual child. (Don't
{ // activate window if focus moved to a new context menu or other popup!!!)
// Mouse must be over the window and left or right mouse button must be pressed.
if (IsMouseOver)
{
if ((inputService.IsPressed(MouseButtons.Left, false)
|| inputService.IsPressed(MouseButtons.Right, false)))
{
Activate();
}
}
}
}
// If the focus moves into this window, it should become activated.
if (IsFocusWithin && !IsActive)
Activate();
// Check whether to start resizing or dragging.
StartResizeAndDrag(context);
// Update mouse cursor.
if ((uiService.Cursor == null || _setSpecialCursor) // Cursor of UIService was set by this window.
&& (!inputService.IsMouseOrTouchHandled || _isResizing)) // Mouse was not yet handled or is currently resizing.
{
switch (_resizeDirection)
{
case ResizeDirection.N:
case ResizeDirection.S:
uiService.Cursor = screen.Renderer.GetCursor("SizeNS");
_setSpecialCursor = true;
break;
case ResizeDirection.E:
case ResizeDirection.W:
uiService.Cursor = screen.Renderer.GetCursor("SizeWE");
_setSpecialCursor = true;
break;
case ResizeDirection.NE:
case ResizeDirection.SW:
uiService.Cursor = screen.Renderer.GetCursor("SizeNESW");
_setSpecialCursor = true;
break;
case ResizeDirection.NW:
case ResizeDirection.SE:
uiService.Cursor = screen.Renderer.GetCursor("SizeNWSE");
_setSpecialCursor = true;
break;
default:
uiService.Cursor = null;
_setSpecialCursor = false;
break;
}
}
// Mouse cannot act through a window.
if (IsMouseOver)
inputService.IsMouseOrTouchHandled = true;
if (IsModal)
{
// Modal windows absorb all input.
inputService.IsMouseOrTouchHandled = true;
inputService.SetGamePadHandled(context.AllowedPlayer, true);
inputService.IsKeyboardHandled = true;
}
}
/// <summary>
/// Opens this <see cref="ContextMenu"/> (adds it to the <see cref="UIScreen"/>).
/// </summary>
/// <param name="owner">The control that opened this context menu.</param>
/// <param name="position">
/// The position of the mouse cursor - or where the context menu should be opened.
/// (<see cref="Offset"/> will be applied to this position.)
/// </param>
/// <exception cref="ArgumentNullException">
/// <paramref name="owner"/> is <see langword="null"/>.
/// </exception>
/// <exception cref="ArgumentException">
/// <paramref name="owner"/> is not loaded. The owner needs to be a visible control.
/// </exception>
public void Open(UIControl owner, Vector2F position)
{
if (owner == null)
{
throw new ArgumentNullException("owner");
}
var screen = owner.Screen;
if (screen == null)
{
throw new ArgumentException("Invalid owner. The owner must be loaded.", "owner");
}
if (!IsEnabled)
{
return;
}
// Close if already opened.
Close();
Owner = owner;
// Make visible and add to screen.
IsVisible = true;
screen.Children.Add(this);
// Choose position near the given position.
// The context menu is positioned so that it fits onto the screen.
Measure(new Vector2F(float.PositiveInfinity));
float x = position.X;
if (x + DesiredWidth > screen.ActualWidth)
{
// Show context menu on the left.
x = x - DesiredWidth;
}
float offset = Offset;
float y = position.Y + offset;
if (y + DesiredHeight > screen.ActualHeight)
{
// Show context menu on top.
// (We use 0.5 * offset if context menu is above cursor. This assumes that the cursor
// is similar to the typical arrow where the hot spot is at the top. If the cursor is a
// different shape we might need to adjust the offset.)
y = y - DesiredHeight - 1.5f * offset;
}
X = x;
Y = y;
if (GlobalSettings.PlatformID == PlatformID.WindowsPhone8)
{
// Imitate position of Silverlight WP7 context menus.
if (screen.ActualHeight >= screen.ActualWidth)
{
// Portrait mode.
X = 0;
HorizontalAlignment = HorizontalAlignment.Stretch;
VerticalAlignment = VerticalAlignment.Top;
}
else
{
// Landscape mode.
Y = 0;
Width = screen.ActualWidth / 2;
HorizontalAlignment = HorizontalAlignment.Left;
VerticalAlignment = VerticalAlignment.Stretch;
if (position.X <= screen.ActualWidth / 2)
{
// Show context menu on right half of the screen.
X = screen.ActualWidth / 2;
}
else
{
// Show context menu on the left half of the screen.
X = 0;
}
}
}
screen.FocusManager.Focus(this);
IsOpen = true;
}