System\Windows\Forms\Control.cs (144)
260private Control? _parent;
261private WeakReference<Control>? _reflectParent;
312/// Initializes a new instance of the <see cref="Control"/> class.
406/// Initializes a new instance of the <see cref="Control"/> class.
413/// Initializes a new instance of the <see cref="Control"/> class.
421/// Initializes a new instance of the <see cref="Control"/> class.
423public Control(Control? parent, string? text) : this()
430/// Initializes a new instance of the <see cref="Control"/> class.
432public Control(Control? parent, string? text, int left, int top, int width, int height) : this(parent, text)
506/// of Control inheritance in WinForms. The constructor of <see cref="Control"/> calls <see cref="CreateParams"/>,
513/// and related logic may be triggered during the base <see cref="Control"/> construction process, before the
1055Control? parent = ParentInternal;
1223Control? parent = ParentInternal;
1664if (container.ParentInternal is not Control parent
1887Control? control = ParentInternal;
2433Control topMost = TopMostParent;
2499Control? parent = ParentInternal;
2561Control control;
2568Control marshalingControl = FindMarshalingControl();
2612private static ISite? GetSitedParentSite(Control control)
2880public Control? Parent
2886internal virtual Control? ParentInternal
2958private Control? ReflectParent
2960get => _reflectParent?.TryGetTarget(out Control? parent) ?? false ? parent : null;
2965Control? existing = ReflectParent;
3411for (Control? control = this; control is not null; control = control.ParentInternal)
3455public Control? TopLevelControl => TopLevelControlInternal;
3457internal Control? TopLevelControlInternal
3461Control? control = this;
3471internal Control TopMostParent
3475Control control = this;
4442internal virtual void AssignParent(Control? value)
4587Control marshaler = FindMarshalingControl();
4640for (Control? ctl = this; ctl is not null; ctl = ctl._parent)
4655internal static void CheckParentingCycle(Control? bottom, Control? toFind)
4658Control? lastParent = null;
4660for (Control? ctl = bottom; ctl is not null; ctl = ctl.ParentInternal)
4693private void ChildGotFocus(Control child)
4706public bool Contains([NotNullWhen(true)] Control? ctl)
4885Control[] controlSnapshot = new Control[children.Count];
4888foreach (Control control in controlSnapshot)
4983/// Disposes of the resources (other than memory) used by the <see cref="Control"/>.
5045Control child = children[i];
5268Control marshaler = FindMarshalingControl();
5322Control? current = this;
5337private Control FindMarshalingControl()
5341Control? c = this;
5345Control? p = c.ParentInternal;
5446public static Control? FromChildHandle(IntPtr handle)
5451Control? control = FromHandle(hwnd);
5465/// it with the first parent <see cref="Control"/> if possible.
5473public static Control? FromHandle(IntPtr handle)
5522public Control? GetChildAtPoint(Point pt, GetChildAtPointSkip skipValue)
5533Control? control = FromChildHandle(hwnd);
5546public Control? GetChildAtPoint(Point pt) => GetChildAtPoint(pt, GetChildAtPointSkip.None);
5554Control? c = IsContainerControl ? ParentInternal : this;
5564private static bool IsFocusManagingContainerControl(Control ctl)
5664Control? control = this;
5695Control? ctl = FromHandle(hWndChild);
5717internal Control[] GetChildControlsInTabOrder(bool handleCreatedOnly)
5721foreach (Control c in Controls)
5731Control[] controls = new Control[holders.Count];
5740internal virtual Control? GetFirstChildControlInTabOrder(bool forward)
5747Control? found = null;
5823public Control? GetNextControl(Control? ctl, bool forward)
5834Control? found = ctl.GetFirstChildControlInTabOrder(forward: true);
5845Control? found = null;
5846Control? p = ctl._parent;
5908Control? found = null;
5909Control? parent = ctl._parent ?? throw new InvalidOperationException(
5929Control sibling = siblings[c];
5989Control? found = ctl.GetFirstChildControlInTabOrder(forward: false);
6006/// Return <see cref="Handle"/> if <paramref name="window"/> is a <see cref="Control"/>.
6012if (window is Control control)
6286Control marshaler = FindMarshalingControl();
6480protected void InvokePaint(Control c, PaintEventArgs e)
6485protected void InvokePaintBackground(Control c, PaintEventArgs e)
6496/// Returns <see langword="true"/> if <paramref name="descendant"/> is a descendant of this <see cref="Control"/>.
6498internal bool IsDescendant(Control? descendant)
6500Control? control = descendant;
6642private static bool IsScaledByParent(Control control)
6644Control? parentControl = control.Parent;
6700private object MarshaledInvoke(Control caller, Delegate method, object?[]? args, bool synchronous)
6873protected void InvokeOnClick(Control? toInvoke, EventArgs e)
7003internal virtual void OnChildLayoutResuming(Control child, bool performLayout)
7136Control.ControlCollection children,
7488Control source,
7505Control control,
7519private Control Control { get; }
7535public VisualStylesModeChangeEventArgs CreateForControl(Control control)
7574public void RequestLayout(Control? target, Control cause)
7594public void RequestAncestorLayouts(Control? target, Control cause)
7596for (Control? current = target; current is not null; current = current.ParentInternal)
7602private static int GetLayoutDepth(Control control)
7606for (Control? parent = control.ParentInternal; parent is not null; parent = parent.ParentInternal)
7615Control source,
7621public Control Source { get; } = source;
7630public VisualStylesModeLayoutRequest(Control target, Control cause)
7637public Control Cause { get; }
7639public Control Target { get; }
7680Control? parent = ParentInternal;
7856Control child = children[i];
8253protected void InvokeGotFocus(Control? toInvoke, EventArgs e)
8411protected void InvokeLostFocus(Control? toInvoke, EventArgs e)
8995Control? parent = ParentInternal;
9125for (Control? c = ParentInternal; c is not null; c = c.ParentInternal)
9163public void PerformLayout(Control? affectedControl, string? affectedProperty)
9279foreach (Control c in Controls)
9412/// on the <see cref="Control"/> referenced by the <paramref name="msg"/> <see cref="Message.HWnd"/>. It
9427internal static PreProcessControlState PreProcessControlMessageInternal(Control? target, ref Message message)
9574Control child = Controls[i];
9777Control? topMostParent = null;
9976Control?[]? controlSnapshot = null;
9989controlSnapshot = new Control[children.Count];
9993Control childControl = children[i];
10053Control? childControl = controlSnapshot[i];
10274Control child = children[i];
10391internal virtual void Scale(SizeF includedFactor, SizeF excludedFactor, Control requestingControl, bool causedByFontChanged = false)
10427internal void ScaleChildControls(SizeF includedFactor, SizeF excludedFactor, Control requestingControl, bool causedByFontChanged = false)
10436Control child = children[i];
10692public bool SelectNextControl(Control? ctl, bool forward, bool tabStopOnly, bool nested, bool wrap)
10694Control? nextSelectableControl = GetNextSelectableControl(ctl, forward, tabStopOnly, nested, wrap);
10706private Control? GetNextSelectableControl(Control? ctl, bool forward, bool tabStopOnly, bool nested, bool wrap)
10714Control? start = ctl;
10765((Control)c).SelectNextControl(this, true, true, true, true);
11271internal static AutoValidate GetAutoValidateForControl(Control control)
11672private void UpdateChildControlIndex(Control control)
11679if (this is TabControl || GetType() == typeof(Control))
11689Control? previousControl = FromHandle(hWnd);
11748private void UpdateChildZOrder(Control control)
11758Control child = Controls[i];
11933internal void WmContextMenu(ref Message m, Control sourceControl)
11973Control? control = FromHandle(m.LParamInternal);
13595Control? controlParent = ParentInternal;
13612void AddIfCreated(Control? control)
13671internal virtual ToolInfoWrapper<Control> GetToolInfoWrapper(TOOLTIP_FLAGS flags, string? caption, ToolTip tooltip)
System\Windows\Forms\Controls\Buttons\ButtonInternal\DarkMode\ButtonDarkModeRendererBase.cs (1)
107Control control,
System\Windows\Forms\Controls\Buttons\ButtonInternal\DarkMode\IButtonRenderer.cs (1)
44Control control,
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 = [];
420if (errBindings[j].Control is Control control)
465Dictionary<Control, string> controlError = new(bindingsCount);
470if (errBindings[j].Control is not Control control)
498foreach (KeyValuePair<Control, string> entry in controlError)
671return extendee is Control and not Form;
702private ControlItem EnsureControlItem(Control control)
718internal ErrorWindow EnsureErrorWindow(Control parent)
736public string GetError(Control control) => EnsureControlItem(control).Error;
745public ErrorIconAlignment GetIconAlignment(Control control) => EnsureControlItem(control).IconAlignment;
754public int GetIconPadding(Control control) => EnsureControlItem(control).IconPadding;
772public void SetError(Control control, string? value)
796public void SetIconAlignment(Control control, ErrorIconAlignment value)
804public 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)
140HandleRef<HWND> handle = parent is not null ? (new(parent)) : Control.GetHandleRef(PInvoke.GetActiveWindow());
197private static void ShowHTMLFile(Control? parent, string? url, HelpNavigator command, object? param)
217HandleRef<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;
1812Control? parent = ParentInternal;
1834private bool SelectNextControlInContainer(Control? ctl, bool forward, bool tabStopOnly,
1915Control? parent = ParentInternal;
1937private bool SelectNextControlInPanel(Control? ctl, bool forward, bool tabStopOnly,
2004private static void SelectNextActiveControl(Control ctl, bool forward, bool tabStopOnly, bool nested, bool wrap)
2035foreach (Control control in sc.Controls)
2040foreach (Control child in control.Controls)
2297internal 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 (75)
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;
723PInvoke.SetWindowTheme(HWND, $"{Control.DarkModeIdentifier}_{Control.ExplorerThemeIdentifier}", null);
797Control[] controls = [.. _tools.Keys];
798foreach (Control control in controls)
806Control[] controls = [.. _tools.Keys];
807foreach (Control control in controls)
819private void SetToolInfo(Control control, string? caption)
847private void CreateRegion(Control control)
873if (sender is not Control control)
901private void DestroyRegion(Control control)
917new ToolInfoWrapper<Control>(control).SendMessage(this, PInvoke.TTM_DELTOOLW);
976private unsafe ToolInfoWrapper<Control> GetTOOLINFO(Control control, string? caption)
1006return new(Control.GetSafeHandle(window), flags);
1016public string? GetToolTip(Control? control)
1034Control? current = TopLevelControl;
1043Control? currentControl = Control.FromHandle(hwndControl);
1077current = Control.FromHandle(found);
1080current = Control.FromChildHandle(found);
1097Control? control = Control.FromHandle(hwnd);
1151Control[] controls = [.. _tools.Keys];
1152foreach (Control control in controls)
1209public void SetToolTip(Control control, string? caption)
1218private void SetToolTipInternal(Control control, TipInfo info)
1251ToolInfoWrapper<Control> toolInfo = GetTOOLINFO(control, info!.Caption);
1270private void SetToolTipToControl(Control associatedControl)
1313if (window is Control associatedControl)
1413PInvokeCore.GetWindowRect(Control.GetSafeHandle(window), out var r);
1433PInvokeCore.GetWindowRect(Control.GetSafeHandle(window), out var r);
1451PInvokeCore.GetWindowRect(Control.GetSafeHandle(window), out var r);
1469PInvokeCore.GetWindowRect(Control.GetSafeHandle(window), out var r);
1506if ((tool is Control toolAsControl && _tools.TryGetValue(toolAsControl, out TipInfo? tipInfo)) ||
1507(ownerWindow is Control ownerWindowAsControl && _tools.TryGetValue(ownerWindowAsControl, out tipInfo)))
1536ToolInfoWrapper<HandleRef<HWND>> info = new(Control.GetSafeHandle(ownerWindow));
1733if (win is Control control && control.IsDisposed)
1741ToolInfoWrapper<HandleRef<HWND>> info = new(Control.GetSafeHandle(win));
1749if (win is not Control tool)
1784Control[] controls = [.. _owners.Values];
1793Control? tool = window as Control;
1796ToolInfoWrapper<Control> toolInfo = new(tool);
1831if (window is Control windowAsControl)
1959ToolInfoWrapper<Control> toolInfo = default;
1968private Control? GetCurrentToolWindow()
1971return _owners.TryGetValue(hwnd, out Control? control) ? control : Control.FromHandle(hwnd);
1980if (window is not Control windowAsControl || !_tools.TryGetValue(windowAsControl, out TipInfo? tipInfo))
2005PInvokeCore.GetWindowRect(Control.GetSafeHandle(window), out var r);
2041Control? toolControl = window as Control;
2155if (window is Control windowAsControl && !_tools.TryGetValue(windowAsControl, out tipInfo))
2229if (window is not Control control || !_tools.TryGetValue(control, out TipInfo? tipInfo))
2335font = Control.DefaultFont;
2338Control? control = window as Control ?? Control.FromHandle(window.Handle);