System\Windows\Forms\Control.cs (126)
249private Control? _parent;
250private WeakReference<Control>? _reflectParent;
302/// Initializes a new instance of the <see cref="Control"/> class.
396/// Initializes a new instance of the <see cref="Control"/> class.
403/// Initializes a new instance of the <see cref="Control"/> class.
411/// Initializes a new instance of the <see cref="Control"/> class.
413public Control(Control? parent, string? text) : this()
420/// Initializes a new instance of the <see cref="Control"/> class.
422public Control(Control? parent, string? text, int left, int top, int width, int height) : this(parent, text)
496/// of Control inheritance in WinForms. The constructor of <see cref="Control"/> calls <see cref="CreateParams"/>,
503/// and related logic may be triggered during the base <see cref="Control"/> construction process, before the
876Control? parent = ParentInternal;
1044Control? parent = ParentInternal;
1492if (container.ParentInternal is not Control parent
1715Control? control = ParentInternal;
2261Control topMost = TopMostParent;
2327Control? parent = ParentInternal;
2389Control control;
2396Control marshalingControl = FindMarshalingControl();
2440private static ISite? GetSitedParentSite(Control control)
2708public Control? Parent
2714internal virtual Control? ParentInternal
2786private Control? ReflectParent
2788get => _reflectParent?.TryGetTarget(out Control? parent) ?? false ? parent : null;
2793Control? existing = ReflectParent;
3239for (Control? control = this; control is not null; control = control.ParentInternal)
3283public Control? TopLevelControl => TopLevelControlInternal;
3285internal Control? TopLevelControlInternal
3289Control? control = this;
3299internal Control TopMostParent
3303Control control = this;
4239internal virtual void AssignParent(Control? value)
4378Control marshaler = FindMarshalingControl();
4432for (Control? ctl = this; ctl is not null; ctl = ctl._parent)
4447internal static void CheckParentingCycle(Control? bottom, Control? toFind)
4450Control? lastParent = null;
4452for (Control? ctl = bottom; ctl is not null; ctl = ctl.ParentInternal)
4485private void ChildGotFocus(Control child)
4498public bool Contains([NotNullWhen(true)] Control? ctl)
4677Control[] controlSnapshot = new Control[children.Count];
4680foreach (Control control in controlSnapshot)
4775/// Disposes of the resources (other than memory) used by the <see cref="Control"/>.
4837Control child = children[i];
5060Control marshaler = FindMarshalingControl();
5106Control? current = this;
5121private Control FindMarshalingControl()
5125Control? c = this;
5129Control? p = c.ParentInternal;
5230public static Control? FromChildHandle(IntPtr handle)
5235Control? control = FromHandle(hwnd);
5249/// it with the first parent <see cref="Control"/> if possible.
5257public static Control? FromHandle(IntPtr handle)
5306public Control? GetChildAtPoint(Point pt, GetChildAtPointSkip skipValue)
5317Control? control = FromChildHandle(hwnd);
5330public Control? GetChildAtPoint(Point pt) => GetChildAtPoint(pt, GetChildAtPointSkip.None);
5338Control? c = IsContainerControl ? ParentInternal : this;
5348private static bool IsFocusManagingContainerControl(Control ctl)
5447Control? control = this;
5478Control? ctl = FromHandle(hWndChild);
5500internal Control[] GetChildControlsInTabOrder(bool handleCreatedOnly)
5504foreach (Control c in Controls)
5514Control[] controls = new Control[holders.Count];
5523internal virtual Control? GetFirstChildControlInTabOrder(bool forward)
5530Control? found = null;
5606public Control? GetNextControl(Control? ctl, bool forward)
5617Control? found = ctl.GetFirstChildControlInTabOrder(forward: true);
5628Control? found = null;
5629Control? p = ctl._parent;
5691Control? found = null;
5692Control? parent = ctl._parent ?? throw new InvalidOperationException(
5712Control sibling = siblings[c];
5772Control? found = ctl.GetFirstChildControlInTabOrder(forward: false);
5789/// Return <see cref="Handle"/> if <paramref name="window"/> is a <see cref="Control"/>.
5795if (window is Control control)
6067Control marshaler = FindMarshalingControl();
6261protected void InvokePaint(Control c, PaintEventArgs e)
6266protected void InvokePaintBackground(Control c, PaintEventArgs e)
6277/// Returns <see langword="true"/> if <paramref name="descendant"/> is a descendant of this <see cref="Control"/>.
6279internal bool IsDescendant(Control? descendant)
6281Control? control = descendant;
6423private static bool IsScaledByParent(Control control)
6425Control? parentControl = control.Parent;
6481private object MarshaledInvoke(Control caller, Delegate method, object?[]? args, bool synchronous)
6654protected void InvokeOnClick(Control? toInvoke, EventArgs e)
6784internal virtual void OnChildLayoutResuming(Control child, bool performLayout)
7086Control? parent = ParentInternal;
7262Control child = children[i];
7650protected void InvokeGotFocus(Control? toInvoke, EventArgs e)
7808protected void InvokeLostFocus(Control? toInvoke, EventArgs e)
8271Control? parent = ParentInternal;
8401for (Control? c = ParentInternal; c is not null; c = c.ParentInternal)
8439public void PerformLayout(Control? affectedControl, string? affectedProperty)
8555foreach (Control c in Controls)
8688/// on the <see cref="Control"/> referenced by the <paramref name="msg"/> <see cref="Message.HWnd"/>. It
8703internal static PreProcessControlState PreProcessControlMessageInternal(Control? target, ref Message message)
8850Control child = Controls[i];
9053Control? topMostParent = null;
9252Control?[]? controlSnapshot = null;
9265controlSnapshot = new Control[children.Count];
9269Control childControl = children[i];
9329Control? childControl = controlSnapshot[i];
9551Control child = children[i];
9668internal virtual void Scale(SizeF includedFactor, SizeF excludedFactor, Control requestingControl, bool causedByFontChanged = false)
9704internal void ScaleChildControls(SizeF includedFactor, SizeF excludedFactor, Control requestingControl, bool causedByFontChanged = false)
9713Control child = children[i];
9969public bool SelectNextControl(Control? ctl, bool forward, bool tabStopOnly, bool nested, bool wrap)
9971Control? nextSelectableControl = GetNextSelectableControl(ctl, forward, tabStopOnly, nested, wrap);
9983private Control? GetNextSelectableControl(Control? ctl, bool forward, bool tabStopOnly, bool nested, bool wrap)
9991Control? start = ctl;
10042((Control)c).SelectNextControl(this, true, true, true, true);
10550internal static AutoValidate GetAutoValidateForControl(Control control)
10951private void UpdateChildControlIndex(Control control)
10958if (this is TabControl || GetType() == typeof(Control))
10968Control? previousControl = FromHandle(hWnd);
11027private void UpdateChildZOrder(Control control)
11037Control child = Controls[i];
11212internal void WmContextMenu(ref Message m, Control sourceControl)
11252Control? control = FromHandle(m.LParamInternal);
12862Control? controlParent = ParentInternal;
12879void AddIfCreated(Control? control)
12938internal virtual ToolInfoWrapper<Control> GetToolInfoWrapper(TOOLTIP_FLAGS flags, string? caption, ToolTip tooltip)
System\Windows\Forms\ErrorProvider\ErrorProvider.cs (18)
17[ProvideProperty("IconPadding", typeof(Control))]
18[ProvideProperty("IconAlignment", typeof(Control))]
19[ProvideProperty("Error", typeof(Control))]
25private readonly Dictionary<Control, ControlItem> _items = [];
26private readonly Dictionary<Control, ErrorWindow> _windows = [];
428if (errBindings[j].Control is Control control)
473Dictionary<Control, string> controlError = new(bindingsCount);
478if (errBindings[j].Control is not Control control)
506foreach (KeyValuePair<Control, string> entry in controlError)
683return extendee is Control and not Form;
717private ControlItem EnsureControlItem(Control control)
733internal ErrorWindow EnsureErrorWindow(Control parent)
751public string GetError(Control control) => EnsureControlItem(control).Error;
760public ErrorIconAlignment GetIconAlignment(Control control) => EnsureControlItem(control).IconAlignment;
769public int GetIconPadding(Control control) => EnsureControlItem(control).IconPadding;
787public void SetError(Control control, string? value)
811public void SetIconAlignment(Control control, ErrorIconAlignment value)
819public void SetIconPadding(Control control, int padding)
System\Windows\Forms\Help\Help.cs (10)
22public static void ShowHelp(Control? parent, string? url)
30public static void ShowHelp(Control? parent, string? url, HelpNavigator navigator)
38public static void ShowHelp(Control? parent, string? url, string? keyword)
53public static void ShowHelp(Control? parent, string? url, HelpNavigator command, object? parameter)
69public static void ShowHelpIndex(Control? parent, string? url)
77public static unsafe void ShowPopup(Control? parent, string caption, Point location)
102private static unsafe void ShowHTML10Help(Control? parent, string? url, HelpNavigator command, object? param)
137HandleRef<HWND> handle = parent is not null ? (new(parent)) : Control.GetHandleRef(PInvoke.GetActiveWindow());
194private static void ShowHTMLFile(Control? parent, string? url, HelpNavigator command, object? param)
214HandleRef<HWND> handle = parent is not null ? new(parent) : Control.GetHandleRef(PInvoke.GetActiveWindow());
System\Windows\Forms\Help\HelpProvider.cs (24)
12[ProvideProperty("HelpString", typeof(Control))]
13[ProvideProperty("HelpKeyword", typeof(Control))]
14[ProvideProperty("HelpNavigator", typeof(Control))]
15[ProvideProperty("ShowHelp", typeof(Control))]
20private readonly Dictionary<Control, string?> _helpStrings = [];
21private readonly Dictionary<Control, bool> _showHelp = [];
22private readonly List<Control> _boundControls = [];
23private readonly Dictionary<Control, string?> _keywords = [];
24private readonly Dictionary<Control, HelpNavigator> _navigators = [];
55public virtual bool CanExtend(object? target) => target is Control;
63public virtual string? GetHelpKeyword(Control ctl)
75public virtual HelpNavigator GetHelpNavigator(Control ctl)
87public virtual string? GetHelpString(Control ctl)
98public virtual bool GetShowHelp(Control ctl)
109if (sender is not Control ctl)
123if (Control.MouseButtons != MouseButtons.None && !string.IsNullOrEmpty(helpString))
159if (sender is not Control ctl)
172public virtual void SetHelpString(Control ctl, string? helpString)
188public virtual void SetHelpKeyword(Control ctl, string? keyword)
204public virtual void SetHelpNavigator(Control ctl, HelpNavigator navigator)
218public virtual void SetShowHelp(Control ctl, bool value)
229internal bool ShouldSerializeShowHelp(Control ctl)
239public virtual void ResetShowHelp(Control ctl)
249private void UpdateEventBinding(Control ctl)
System\Windows\Forms\Layout\Containers\SplitContainer.cs (11)
64private Control? _nextActiveControl;
1537Control? group = this;
1803Control? parent = ParentInternal;
1825private bool SelectNextControlInContainer(Control? ctl, bool forward, bool tabStopOnly,
1906Control? parent = ParentInternal;
1928private bool SelectNextControlInPanel(Control? ctl, bool forward, bool tabStopOnly,
1995private static void SelectNextActiveControl(Control ctl, bool forward, bool tabStopOnly, bool nested, bool wrap)
2026foreach (Control control in sc.Controls)
2031foreach (Control child in control.Controls)
2288internal override void AfterControlRemoved(Control control, Control oldParent)
System\Windows\Forms\Panels\TableLayoutPanel\TableLayoutPanel.cs (19)
11[ProvideProperty("ColumnSpan", typeof(Control))]
12[ProvideProperty("RowSpan", typeof(Control))]
13[ProvideProperty("Row", typeof(Control))]
14[ProvideProperty("Column", typeof(Control))]
15[ProvideProperty("CellPosition", typeof(Control))]
177obj is Control control && control.Parent == this;
183public int GetColumnSpan(Control control) =>
186public void SetColumnSpan(Control control, int value)
197public int GetRowSpan(Control control) => _tableLayoutSettings.GetRowSpan(control);
199public void SetRowSpan(Control control, int value)
212public int GetRow(Control control) => _tableLayoutSettings.GetRow(control);
215public void SetRow(Control control, int row)
227public TableLayoutPanelCellPosition GetCellPosition(Control control) =>
231public void SetCellPosition(Control control, TableLayoutPanelCellPosition position) =>
240public int GetColumn(Control control) => _tableLayoutSettings.GetColumn(control);
243public void SetColumn(Control control, int column)
252public Control? GetControlFromPosition(int column, int row) =>
253(Control?)_tableLayoutSettings.GetControlFromPosition(column, row);
255public TableLayoutPanelCellPosition GetPositionFromControl(Control? control) =>
System\Windows\Forms\ToolTip\ToolTip.cs (73)
13[ProvideProperty(nameof(ToolTip), typeof(Control))]
36private readonly Dictionary<Control, TipInfo> _tools = [];
41private Control? _topLevelControl;
50private readonly Dictionary<HWND, Control> _owners = [];
69private readonly HashSet<Control> _created = [];
149internal string? GetCaptionForTool(Control tool)
305if (window is Control control &&
475private Control? TopLevelControl
484Control? currentTopLevel = null;
485Control[] controls = [.. _tools.Keys];
488var control = controls[i];
617private void AnnounceText(Control? tool, string text)
636Control control = (Control)sender!;
645Control control = (Control)sender!;
676public bool CanExtend(object target) => target is Control;
793Control[] controls = [.. _tools.Keys];
794foreach (Control control in controls)
802Control[] controls = [.. _tools.Keys];
803foreach (Control control in controls)
815private void SetToolInfo(Control control, string? caption)
843private void CreateRegion(Control control)
869if (sender is not Control control)
897private void DestroyRegion(Control control)
913new ToolInfoWrapper<Control>(control).SendMessage(this, PInvoke.TTM_DELTOOLW);
972private unsafe ToolInfoWrapper<Control> GetTOOLINFO(Control control, string? caption)
1002return new(Control.GetSafeHandle(window), flags);
1012public string? GetToolTip(Control? control)
1030Control? current = TopLevelControl;
1039Control? currentControl = Control.FromHandle(hwndControl);
1073current = Control.FromHandle(found);
1076current = Control.FromChildHandle(found);
1093Control? control = Control.FromHandle(hwnd);
1147Control[] controls = [.. _tools.Keys];
1148foreach (Control control in controls)
1205public void SetToolTip(Control control, string? caption)
1214private void SetToolTipInternal(Control control, TipInfo info)
1247ToolInfoWrapper<Control> toolInfo = GetTOOLINFO(control, info!.Caption);
1266private void SetToolTipToControl(Control associatedControl)
1309if (window is Control associatedControl)
1409PInvokeCore.GetWindowRect(Control.GetSafeHandle(window), out var r);
1429PInvokeCore.GetWindowRect(Control.GetSafeHandle(window), out var r);
1447PInvokeCore.GetWindowRect(Control.GetSafeHandle(window), out var r);
1465PInvokeCore.GetWindowRect(Control.GetSafeHandle(window), out var r);
1502if ((tool is Control toolAsControl && _tools.TryGetValue(toolAsControl, out TipInfo? tipInfo)) ||
1503(ownerWindow is Control ownerWindowAsControl && _tools.TryGetValue(ownerWindowAsControl, out tipInfo)))
1532ToolInfoWrapper<HandleRef<HWND>> info = new(Control.GetSafeHandle(ownerWindow));
1729if (win is Control control && control.IsDisposed)
1737ToolInfoWrapper<HandleRef<HWND>> info = new(Control.GetSafeHandle(win));
1745if (win is not Control tool)
1783Control[] controls = [.. _owners.Values];
1792Control? tool = window as Control;
1795ToolInfoWrapper<Control> toolInfo = new(tool);
1830if (window is Control windowAsControl)
1961ToolInfoWrapper<Control> toolInfo = default;
1970private Control? GetCurrentToolWindow()
1973return _owners.TryGetValue(hwnd, out Control? control) ? control : Control.FromHandle(hwnd);
1982if (window is not Control windowAsControl || !_tools.TryGetValue(windowAsControl, out TipInfo? tipInfo))
2007PInvokeCore.GetWindowRect(Control.GetSafeHandle(window), out var r);
2043Control? toolControl = window as Control;
2157if (window is Control windowAsControl && !_tools.TryGetValue(windowAsControl, out tipInfo))
2231if (window is not Control control || !_tools.TryGetValue(control, out TipInfo? tipInfo))
2337font = Control.DefaultFont;
2340Control? control = window as Control ?? Control.FromHandle(window.Handle);