mcs/class/Managed.Windows.Forms/System.Windows.Forms/ContainerControl.cs

   1 // Permission is hereby granted, free of charge, to any person obtaining
   2 // a copy of this software and associated documentation files (the
   3 // "Software"), to deal in the Software without restriction, including
   4 // without limitation the rights to use, copy, modify, merge, publish,
   5 // distribute, sublicense, and/or sell copies of the Software, and to
   6 // permit persons to whom the Software is furnished to do so, subject to
   7 // the following conditions:
   8 //
   9 // The above copyright notice and this permission notice shall be
  10 // included in all copies or substantial portions of the Software.
  11 //
  12 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  13 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  14 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  15 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  16 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  17 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  18 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  19 //
  20 // Copyright (c) 2004 Novell, Inc.
  21 //
  22 // Authors:
  23 //      Peter Bartok    pbartok@novell.com
  24 //
  25 //
  26
  27
  28 // NOT COMPLETE
  29
  30 using System.ComponentModel;
  31 using System.ComponentModel.Design;
  32
  33 namespace System.Windows.Forms {
  34         public class ContainerControl : ScrollableControl, IContainerControl {
  35                 private Control active_control;
  36                 private Control focused_control;
  37                 private Control unvalidated_control;
  38
  39                 #region Public Constructors
  40                 public ContainerControl() {
  41                         active_control = null;
  42                         focused_control = null;
  43                         unvalidated_control = null;
  44                 }
  45                 #endregion      // Public Constructors
  46
  47                 #region Public Instance Properties
  48                 [Browsable (false)]
  49                 [DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
  50                 public Control ActiveControl {
  51                         get {
  52                                 return active_control;
  53                         }
  54
  55                         set {
  56                                 if ((active_control==value) || (value==null)) {
  57                                         return;
  58                                 }
  59
  60                                 active_control = value;
  61
  62                                 if (!Contains(value) && this != value) {
  63                                         throw new ArgumentException("Not a child control");
  64                                 }
  65
  66                                 // Scroll control into view
  67
  68                                 // Let the control know it's selected
  69                                 Select(value);
  70                         }
  71                 }
  72
  73                 [Browsable (false)]
  74                 public override BindingContext BindingContext {
  75                         get {
  76                                 if (base.BindingContext == null) {
  77                                         base.BindingContext = new BindingContext();
  78                                 }
  79                                 return base.BindingContext;
  80                         }
  81
  82                         set {
  83                                 base.BindingContext = value;
  84                         }
  85                 }
  86
  87                 [Browsable (false)]
  88                 [DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
  89                 public Form ParentForm {
  90                         get {
  91                                 Control parent;
  92
  93                                 parent = this.parent;
  94
  95                                 while (parent != null) {
  96                                         if (parent is Form) {
  97                                                 return (Form)parent;
  98                                         }
  99                                         parent = parent.parent;
 100                                 }
 101
 102                                 return null;
 103                         }
 104                 }
 105                 #endregion      // Public Instance Properties
 106
 107                 #region Protected Instance Methods
 108                 protected override CreateParams CreateParams {
 109                         get {
 110                                 return base.CreateParams;
 111                         }
 112                 }
 113                 #endregion      // Public Instance Methods
 114
 115                 #region Public Instance Methods
 116                 [MonoTODO]
 117                 public bool Validate() {
 118                         throw new NotImplementedException();
 119                 }
 120
 121                 public bool ActivateControl(Control control) {
 122                         return Select(control);
 123                 }
 124                 #endregion      // Public Instance Methods
 125
 126                 #region Protected Instance Methods
 127                 [EditorBrowsable (EditorBrowsableState.Advanced)]
 128                 protected override void AdjustFormScrollbars(bool displayScrollbars) {
 129                         // Internal MS
 130                 }
 131
 132                 protected override void Dispose(bool disposing) {
 133                         base.Dispose(disposing);
 134                 }
 135
 136                 [EditorBrowsable (EditorBrowsableState.Advanced)]
 137                 protected override void OnControlRemoved(ControlEventArgs e) {
 138                         if (e.Control == this.unvalidated_control) {
 139                                 this.unvalidated_control = null;
 140                         }
 141
 142                         if (e.Control == this.active_control) {
 143                                 this.unvalidated_control = null;
 144                         }
 145
 146                         base.OnControlRemoved(e);
 147                 }
 148
 149                 protected override void OnCreateControl() {
 150                         base.OnCreateControl();
 151                 }
 152
 153                 [EditorBrowsable (EditorBrowsableState.Advanced)]
 154                 protected override bool ProcessDialogChar(char charCode) {
 155                         if (GetTopLevel()) {
 156                                 if (ProcessMnemonic(charCode)) {
 157                                         return true;
 158                                 }
 159                         }
 160                         return base.ProcessDialogChar(charCode);
 161                 }
 162
 163                 protected override bool ProcessDialogKey(Keys keyData) {
 164                         Keys    key;
 165                         bool    forward;
 166
 167                         key = keyData & Keys.KeyCode;
 168                         forward = true;
 169
 170                         switch (key) {
 171                                 case Keys.Tab: {
 172                                         if (ProcessTabKey((Control.ModifierKeys & Keys.Shift) == 0)) {
 173                                                 return true;
 174                                         }
 175                                         break;
 176                                 }
 177
 178                                 case Keys.Left: {
 179                                         forward = false;
 180                                         goto case Keys.Down;
 181                                 }
 182
 183                                 case Keys.Up: {
 184                                         forward = false;
 185                                         goto case Keys.Down;
 186                                 }
 187
 188                                 case Keys.Right: {
 189                                         goto case Keys.Down;
 190                                 }
 191                                 case Keys.Down: {
 192                                         if (SelectNextControl(active_control, forward, false, false, true)) {
 193                                                 return true;
 194                                         }
 195                                         break;
 196                                 }
 197
 198
 199                         }
 200                         return base.ProcessDialogKey(keyData);
 201                 }
 202
 203                 protected override bool ProcessMnemonic(char charCode) {
 204                         bool    wrapped;
 205                         Control c;
 206
 207                         wrapped = false;
 208                         c = active_control;
 209
 210                         do {
 211                                 c = GetNextControl(c, true);
 212                                 if (c != null) {
 213                                         // This is stupid. I want to be able to call c.ProcessMnemonic directly
 214                                         if (c.ProcessControlMnemonic(charCode)) {
 215                                                 return(true);
 216                                         }
 217                                         continue;
 218                                 } else {
 219                                         if (wrapped) {
 220                                                 break;
 221                                         }
 222                                         wrapped = true;
 223                                 }
 224                         } while (c != active_control);
 225
 226                         return false;
 227                 }
 228
 229                 protected virtual bool ProcessTabKey(bool forward) {
 230                         return SelectNextControl(active_control, forward, true, true, true);
 231                 }
 232
 233                 protected override void Select(bool directed, bool forward) {
 234                         base.Select(directed, forward);
 235                 }
 236
 237                 protected virtual void UpdateDefaultButton() {
 238                         // MS Internal
 239                 }
 240
 241                 [EditorBrowsable (EditorBrowsableState.Advanced)]
 242                 protected override void WndProc(ref Message m) {
 243                         base.WndProc(ref m);
 244                 }
 245                 #endregion      // Protected Instance Methods
 246         }
 247 }