Imported Upstream version 4.2.0.179

Former-commit-id: 4610231f55806d2a05ed69e5ff3faa7336cc1479

mcs/class/System.Windows.Forms/System.Windows.Forms/RadioButton.cs

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+// Permission is hereby granted, free of charge, to any person obtaining
+// a copy of this software and associated documentation files (the
+// "Software"), to deal in the Software without restriction, including
+// without limitation the rights to use, copy, modify, merge, publish,
+// distribute, sublicense, and/or sell copies of the Software, and to
+// permit persons to whom the Software is furnished to do so, subject to
+// the following conditions:
+// 
+// The above copyright notice and this permission notice shall be
+// included in all copies or substantial portions of the Software.
+// 
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+//
+// Copyright (c) 2004-2005 Novell, Inc.
+//
+// Authors:
+//	Peter Bartok	pbartok@novell.com
+//
+
+using System.ComponentModel;
+using System.Drawing;
+using System.Drawing.Text;
+using System.Runtime.InteropServices;
+
+namespace System.Windows.Forms {
+	[DefaultProperty("Checked")]
+	[DefaultEvent("CheckedChanged")]
+	[ClassInterface (ClassInterfaceType.AutoDispatch)]
+	[ComVisible (true)]
+	[DefaultBindingProperty ("Checked")]
+	[ToolboxItem ("System.Windows.Forms.Design.AutoSizeToolboxItem," + Consts.AssemblySystem_Design)]
+	[Designer ("System.Windows.Forms.Design.RadioButtonDesigner, " + Consts.AssemblySystem_Design)]
+	public class RadioButton : ButtonBase {
+		#region Local Variables
+		internal Appearance		appearance;
+		internal bool			auto_check;
+		internal ContentAlignment	radiobutton_alignment;
+		internal CheckState		check_state;
+		#endregion	// Local Variables
+
+		#region RadioButtonAccessibleObject Subclass
+		[ComVisible(true)]
+		public class RadioButtonAccessibleObject : ButtonBaseAccessibleObject {
+			#region RadioButtonAccessibleObject Local Variables
+			private new RadioButton	owner;
+			#endregion	// RadioButtonAccessibleObject Local Variables
+
+			#region RadioButtonAccessibleObject Constructors
+			public RadioButtonAccessibleObject(RadioButton owner) : base(owner) {
+				this.owner = owner;
+			}
+			#endregion	// RadioButtonAccessibleObject Constructors
+
+			#region RadioButtonAccessibleObject Properties
+			public override string DefaultAction {
+				get {
+					return "Select";
+				}
+			}
+
+			public override AccessibleRole Role {
+				get {
+					return AccessibleRole.RadioButton;
+				}
+			}
+
+			public override AccessibleStates State {
+				get {
+					AccessibleStates	retval;
+
+					retval = AccessibleStates.Default;
+
+					if (owner.check_state == CheckState.Checked) {
+						retval |= AccessibleStates.Checked;
+					}
+
+					if (owner.Focused) {
+						retval |= AccessibleStates.Focused;
+					}
+
+					if (owner.CanFocus) {
+						retval |= AccessibleStates.Focusable;
+					}
+
+					return retval;
+				}
+			}
+			#endregion	// RadioButtonAccessibleObject Properties
+
+			#region RadioButtonAccessibleObject Methods
+			public override void DoDefaultAction() {
+				owner.PerformClick();
+			}
+			#endregion	// RadioButtonAccessibleObject Methods
+		}
+		#endregion	// RadioButtonAccessibleObject Sub-class
+
+		#region Public Constructors
+		public RadioButton() {
+			appearance = Appearance.Normal;
+			auto_check = true;
+			radiobutton_alignment = ContentAlignment.MiddleLeft;
+			TextAlign = ContentAlignment.MiddleLeft;
+			TabStop = false;
+		}
+		#endregion	// Public Constructors
+
+		#region Private Methods
+
+		// When getting OnEnter we need to set Checked as true in case none of the sibling radio
+		// buttons is checked.
+		private void PerformDefaultCheck ()
+		{
+			// if we are already checked, no need to check the other controls
+			if (!auto_check || Checked)
+				return;
+
+			bool is_any_selected = false;
+			Control c = Parent;
+			if (c != null) {
+				for (int i = 0; i < c.Controls.Count; i++) {
+					RadioButton rb = c.Controls [i] as RadioButton;
+					if (rb == null || !rb.auto_check)
+						continue;
+
+					if (rb.check_state == CheckState.Checked) {
+						is_any_selected = true;
+						break;
+					}
+				}
+			}
+
+			if (!is_any_selected)
+				Checked = true;
+		}
+
+		private void UpdateSiblings() {
+			Control	c;
+
+			if (auto_check == false) {
+				return;
+			}
+
+			// Remove tabstop property from and uncheck our radio-button siblings
+			c = this.Parent;
+			if (c != null) {
+				for (int i = 0; i < c.Controls.Count; i++) {
+					if ((this != c.Controls[i]) && (c.Controls[i] is RadioButton)) {
+						if (((RadioButton)(c.Controls[i])).auto_check) {
+							c.Controls[i].TabStop = false;
+							((RadioButton)(c.Controls[i])).Checked = false;
+						}
+					}
+				}
+			}
+
+			this.TabStop = true;
+		}
+
+		internal override void Draw (PaintEventArgs pe) {
+			// FIXME: This should be called every time something that can affect it
+			// is changed, not every paint.  Can only change so many things at a time.
+
+			// Figure out where our text and image should go
+			Rectangle glyph_rectangle;
+			Rectangle text_rectangle;
+			Rectangle image_rectangle;
+
+			ThemeEngine.Current.CalculateRadioButtonTextAndImageLayout (this, Point.Empty, out glyph_rectangle, out text_rectangle, out image_rectangle);
+
+			// Draw our button
+			if (FlatStyle != FlatStyle.System && Appearance != Appearance.Button)
+				ThemeEngine.Current.DrawRadioButton (pe.Graphics, this, glyph_rectangle, text_rectangle, image_rectangle, pe.ClipRectangle);
+			else
+				ThemeEngine.Current.DrawRadioButton (pe.Graphics, this.ClientRectangle, this);
+		}
+
+		internal override Size GetPreferredSizeCore (Size proposedSize)
+		{
+			if (this.AutoSize)
+				return ThemeEngine.Current.CalculateRadioButtonAutoSize (this);
+
+			return base.GetPreferredSizeCore (proposedSize);
+		}
+		#endregion	// Private Methods
+
+		#region Public Instance Properties
+		[DefaultValue(Appearance.Normal)]
+		[Localizable(true)]
+		public Appearance Appearance {
+			get {
+				return appearance;
+			}
+
+			set {
+				if (value != appearance) {
+					appearance = value;
+					EventHandler eh = (EventHandler)(Events [AppearanceChangedEvent]);
+					if (eh != null)
+						eh (this, EventArgs.Empty);
+					if (Parent != null)
+						Parent.PerformLayout (this, "Appearance");
+					Invalidate();
+				}
+			}
+		}
+
+		[DefaultValue(true)]
+		public bool AutoCheck {
+			get {
+				return auto_check;
+			}
+
+			set {
+				auto_check = value;
+			}
+		}
+
+		[Localizable(true)]
+		[DefaultValue(ContentAlignment.MiddleLeft)]
+		public ContentAlignment CheckAlign {
+			get {
+				return radiobutton_alignment;
+			}
+
+			set {
+				if (value != radiobutton_alignment) {
+					radiobutton_alignment = value;
+
+					Invalidate();
+				}
+			}
+		}
+
+		[DefaultValue(false)]
+		[SettingsBindable (true)]
+		[Bindable (true, BindingDirection.OneWay)]
+		public bool Checked {
+			get {
+				if (check_state != CheckState.Unchecked) {
+					return true;
+				}
+				return false;
+			}
+
+			set {
+				if (value && (check_state != CheckState.Checked)) {
+					check_state = CheckState.Checked;
+					Invalidate();
+					UpdateSiblings();
+					OnCheckedChanged(EventArgs.Empty);
+				} else if (!value && (check_state != CheckState.Unchecked)) {
+					TabStop = false;
+					check_state = CheckState.Unchecked;
+					Invalidate();
+					OnCheckedChanged(EventArgs.Empty);
+				}
+			}
+		}
+
+		[DefaultValue(false)]
+		public new bool TabStop {
+			get { return base.TabStop; }
+			set { base.TabStop = value; }
+		}
+
+		[DefaultValue(ContentAlignment.MiddleLeft)]
+		[Localizable(true)]
+		public override ContentAlignment TextAlign {
+			get { return base.TextAlign; }
+			set { base.TextAlign = value; }
+		}
+		#endregion	// Public Instance Properties
+
+		#region Protected Instance Properties
+		protected override CreateParams CreateParams {
+			get {
+				SetStyle(ControlStyles.AllPaintingInWmPaint, true);
+				SetStyle(ControlStyles.UserPaint, true);
+
+				return base.CreateParams;
+			}
+		}
+
+		protected override Size DefaultSize {
+			get {
+				return ThemeEngine.Current.RadioButtonDefaultSize;
+			}
+		}
+		#endregion	// Protected Instance Properties
+
+		#region Public Instance Methods
+		public void PerformClick() {
+			OnClick(EventArgs.Empty);
+		}
+
+		public override string ToString() {
+			return base.ToString() + ", Checked: " + this.Checked;
+		}
+		#endregion	// Public Instance Methods
+
+		#region Protected Instance Methods
+		protected override AccessibleObject CreateAccessibilityInstance() {
+			AccessibleObject	ao;
+
+			ao = base.CreateAccessibilityInstance ();
+			ao.role = AccessibleRole.RadioButton;
+
+			return ao;
+		}
+
+		protected virtual void OnCheckedChanged(EventArgs e) {
+			EventHandler eh = (EventHandler)(Events [CheckedChangedEvent]);
+			if (eh != null)
+				eh (this, e);
+		}
+
+		protected override void OnClick(EventArgs e) {
+			if (auto_check) {
+				if (!Checked) {
+					Checked = true;
+				}
+			} else {
+				Checked = !Checked;
+			}
+			
+			base.OnClick (e);
+		}
+
+		protected override void OnEnter(EventArgs e) {
+			PerformDefaultCheck ();
+			base.OnEnter(e);
+		}
+
+		protected override void OnHandleCreated(EventArgs e) {
+			base.OnHandleCreated(e);
+		}
+
+		protected override void OnMouseUp(MouseEventArgs mevent) {
+			base.OnMouseUp(mevent);
+		}
+
+		protected override bool ProcessMnemonic(char charCode) {
+			if (IsMnemonic(charCode, Text) == true) {
+				Select();
+				PerformClick();
+				return true;
+			}
+			
+			return base.ProcessMnemonic(charCode);
+		}
+		#endregion	// Protected Instance Methods
+
+		#region Events
+		static object AppearanceChangedEvent = new object ();
+		static object CheckedChangedEvent = new object ();
+
+		public event EventHandler AppearanceChanged {
+			add { Events.AddHandler (AppearanceChangedEvent, value); }
+			remove { Events.RemoveHandler (AppearanceChangedEvent, value); }
+		}
+
+		public event EventHandler CheckedChanged {
+			add { Events.AddHandler (CheckedChangedEvent, value); }
+			remove { Events.RemoveHandler (CheckedChangedEvent, value); }
+		}
+
+		[Browsable(false)]
+		[EditorBrowsable (EditorBrowsableState.Never)]
+		public new event EventHandler DoubleClick {
+			add { base.DoubleClick += value; }
+			remove { base.DoubleClick -= value; }
+		}
+		
+		[Browsable (false)]
+		[EditorBrowsable (EditorBrowsableState.Never)]
+		public new event MouseEventHandler MouseDoubleClick { 
+			add { base.MouseDoubleClick += value; }
+			remove { base.MouseDoubleClick -= value; }
+		}
+		#endregion	// Events
+	}
+}