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

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   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) 2006 Novell, Inc.
  21 //
  22 // Authors:
  23 //      Jackson Harper (jackson@ximian.com)
  24 //
  25 //
  26
  27 // This is an internal class that allows us to use a textbox for label editing
  28 // in the tree and in listview.  The textbox will make itself invisible when
  29 // the user pressed the enter key
  30
  31 namespace System.Windows.Forms {
  32
  33         internal class LabelEditTextBox : FixedSizeTextBox {
  34
  35                 public LabelEditTextBox () : base (true, true)
  36                 {
  37                 }
  38
  39                 protected override bool IsInputKey (Keys key_data)
  40                 {
  41                         if ((key_data & Keys.Alt) == 0) {
  42                                 switch (key_data & Keys.KeyCode) {
  43                                 case Keys.Enter:
  44                                         return true;
  45                                 case Keys.Escape:
  46                                         return true;
  47                                 }
  48                         }
  49                         return base.IsInputKey (key_data);
  50                 }
  51
  52                 protected override void OnKeyDown (KeyEventArgs e)
  53                 {
  54                         if (!Visible)
  55                                 return;
  56
  57                         switch (e.KeyCode) {
  58                                 case Keys.Return:
  59                                         Visible = false;
  60                                         Parent.Focus ();
  61                                         e.Handled = true;
  62                                         OnEditingFinished (e);
  63                                         break;
  64                                 case Keys.Escape:
  65                                         Visible = false;
  66                                         Parent.Focus ();
  67                                         e.Handled = true;
  68                                         OnEditingCancelled (e);
  69                                         break;
  70                         }
  71                 }
  72
  73                 protected override void OnLostFocus (EventArgs e)
  74                 {
  75                         if (Visible) {
  76                                 OnEditingFinished (e);
  77                         }
  78                 }
  79
  80                 protected void OnEditingCancelled (EventArgs e)
  81                 {
  82                         EventHandler eh = (EventHandler)(Events[EditingCancelledEvent]);
  83                         if (eh != null)
  84                                 eh (this, e);
  85                 }
  86
  87                 protected void OnEditingFinished (EventArgs e)
  88                 {
  89                         EventHandler eh = (EventHandler)(Events [EditingFinishedEvent]);
  90                         if (eh != null)
  91                                 eh (this, e);
  92                 }
  93
  94                 static object EditingCancelledEvent = new object ();
  95                 public event EventHandler EditingCancelled {
  96                         add { Events.AddHandler (EditingCancelledEvent, value); }
  97                         remove { Events.RemoveHandler (EditingCancelledEvent, value); }
  98                 }
  99
 100                 static object EditingFinishedEvent = new object ();
 101                 public event EventHandler EditingFinished {
 102                         add { Events.AddHandler (EditingFinishedEvent, value); }
 103                         remove { Events.AddHandler (EditingFinishedEvent, value); }
 104                 }
 105         }
 106 }
 107