public virtual void CreateHandle()
{
if (NativeWindow != null)
{
throw new InvalidOperationException($"Cannot call {nameof(CreateHandle)}() on a {nameof(Control)} instance that already has one");
}
CreateParams cp = CreateParams;
cp.ParentHandle = IntPtr.Zero;
NativeWindow = ControlNativeWindow.Create(this, cp);
}
protected void SubclassWindow()
{
if (!HandleValid)
{
throw new InvalidOperationException("You must have a valid handle before calling this method");
}
if (NativeWindow is ControlNativeWindow)
{
throw new InvalidOperationException("The NativeWindow has already been subclassed");
}
NativeWindow = ControlNativeWindow.SubclassWindow(this, Handle, NativeWindow.OwnsHandle);
}
public Control ()
{
if (WindowsFormsSynchronizationContext.AutoInstall)
if (!(SynchronizationContext.Current is WindowsFormsSynchronizationContext))
SynchronizationContext.SetSynchronizationContext (new WindowsFormsSynchronizationContext ());
layout_type = LayoutType.Anchor;
anchor_style = AnchorStyles.Top | AnchorStyles.Left;
is_created = false;
is_visible = true;
is_captured = false;
is_disposed = false;
is_enabled = true;
is_entered = false;
layout_pending = false;
is_toplevel = false;
causes_validation = true;
has_focus = false;
layout_suspended = 0;
mouse_clicks = 1;
tab_index = -1;
cursor = null;
right_to_left = RightToLeft.Inherit;
border_style = BorderStyle.None;
background_color = Color.Empty;
dist_right = 0;
dist_bottom = 0;
tab_stop = true;
ime_mode = ImeMode.Inherit;
use_compatible_text_rendering = true;
show_keyboard_cues = false;
show_focus_cues = SystemInformation.MenuAccessKeysUnderlined;
use_wait_cursor = false;
backgroundimage_layout = ImageLayout.Tile;
use_compatible_text_rendering = Application.use_compatible_text_rendering;
padding = this.DefaultPadding;
maximum_size = new Size();
minimum_size = new Size();
margin = this.DefaultMargin;
auto_size_mode = AutoSizeMode.GrowOnly;
control_style = ControlStyles.UserPaint | ControlStyles.AllPaintingInWmPaint |
ControlStyles.Selectable | ControlStyles.StandardClick |
ControlStyles.StandardDoubleClick;
control_style |= ControlStyles.UseTextForAccessibility;
parent = null;
background_image = null;
text = string.Empty;
name = string.Empty;
window_target = new ControlWindowTarget(this);
window = new ControlNativeWindow(this);
child_controls = CreateControlsInstance();
bounds.Size = DefaultSize;
client_size = ClientSizeFromSize (bounds.Size);
client_rect = new Rectangle (Point.Empty, client_size);
explicit_bounds = bounds;
}
