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

   1 // Permission is hereby granted, free of charge, to any person obtaining
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   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. (http://www.novell.com)
  21 //
  22 // Authors:
  23 //      Peter Bartok    (pbartok@novell.com)
  24 //
  25 //
  26
  27 // NOT COMPLETE
  28
  29 using System.ComponentModel;
  30
  31 namespace System.Windows.Forms {
  32         [ToolboxItemFilter("System.Windows.Forms")]
  33         public abstract class CommonDialog : System.ComponentModel.Component {
  34                 #region DialogForm
  35                 internal class DialogForm : Form {
  36                         #region DialogForm Local Variables
  37                         protected CommonDialog  owner;
  38                         #endregion DialogForm Local Variables
  39
  40                         #region DialogForm Constructors
  41                         internal DialogForm(CommonDialog owner) {
  42                                 this.owner = owner;
  43                         }
  44                         #endregion DialogForm Constructors
  45
  46                         #region Protected Instance Properties
  47                         protected override CreateParams CreateParams {
  48                                 get {
  49                                         CreateParams    cp;
  50
  51                                         ControlBox = true;
  52                                         MinimizeBox = false;
  53                                         MaximizeBox = false;
  54
  55                                         cp = base.CreateParams;
  56
  57                                         cp.Style = (int)(WindowStyles.WS_POPUP | WindowStyles.WS_CAPTION | WindowStyles.WS_SYSMENU | WindowStyles.WS_CLIPCHILDREN | WindowStyles.WS_CLIPSIBLINGS);
  58
  59                                         return cp;
  60                                 }
  61                         }
  62                         #endregion      // Protected Instance Properties
  63
  64                         #region Internal Methods
  65                         internal DialogResult RunDialog () {
  66                                 this.StartPosition = FormStartPosition.CenterScreen;
  67
  68                                 owner.InitFormsSize (this);
  69
  70                                 this.ShowDialog ();
  71
  72                                 return this.DialogResult;
  73
  74                         }
  75                         #endregion Internal Methods
  76                 }
  77                 #endregion DialogForm
  78
  79                 #region Local Variables
  80                 internal DialogForm     form;
  81                 #endregion Local Variables
  82
  83                 #region Public Constructors
  84                 public CommonDialog() {
  85                         form = new DialogForm(this);
  86                 }
  87                 #endregion Public Constructors
  88
  89                 #region Internal Methods
  90                 internal virtual void InitFormsSize(Form form) {
  91                         // Override this to set a default size for the form
  92                         form.Width = 200;
  93                         form.Height = 200;
  94                 }
  95                 #endregion Internal Methods
  96
  97                 #region Public Instance Methods
  98                 public abstract void Reset();
  99
 100                 public DialogResult ShowDialog() {
 101                         return ShowDialog(null);
 102                 }
 103
 104                 public DialogResult ShowDialog(IWin32Window ownerWin32) {
 105                         #if broken
 106                         Control         owner = null;
 107
 108                         if (ownerWin32 != null) {
 109                                 owner = Control.FromHandle(ownerWin32.Handle);
 110                         }
 111                         #endif
 112
 113                         RunDialog(form.Handle);
 114
 115                         if (form.Visible) {
 116                                 throw new InvalidOperationException("Already visible forms cannot be displayed as a modal dialog. Set the Visible property to 'false' prior to calling Form.ShowDialog.");
 117                         }
 118
 119                         if (!form.IsHandleCreated) {
 120                                 form.CreateControl();
 121                         }
 122
 123                         #if broken
 124                         form.form_parent_window.Parent = owner;
 125                         #endif
 126
 127                         XplatUI.SetModal(form.window.Handle, true);
 128
 129                         form.Show();
 130
 131                         form.end_modal = false;
 132                         form.is_modal = true;
 133                         Application.ModalRun(form);
 134                         form.is_modal = false;
 135                         form.Hide();
 136
 137                         XplatUI.SetModal(form.window.Handle, false);
 138
 139                         return form.DialogResult;
 140                 }
 141                 #endregion      // Public Instance Methods
 142
 143                 #region Protected Instance Methods
 144                 protected virtual IntPtr HookProc(IntPtr hWnd, int msg, IntPtr wparam, IntPtr lparam) {
 145                         return IntPtr.Zero;
 146                 }
 147
 148                 protected virtual void OnHelpRequest(EventArgs e) {
 149                         if (HelpRequest != null) {
 150                                 HelpRequest(this, e);
 151                         }
 152                 }
 153
 154                 protected virtual IntPtr OwnerWndProc(IntPtr hWnd, int msg, IntPtr wparam, IntPtr lparam) {
 155                         return IntPtr.Zero;
 156                 }
 157
 158                 protected abstract bool RunDialog(IntPtr hwndOwner);
 159                 #endregion      // Protected Instance Methods
 160
 161                 #region Events
 162                 public event EventHandler HelpRequest;
 163                 #endregion      // Events
 164         }
 165 }