mcs/class/Managed.Windows.Forms/System.Windows.Forms/InternalWindowManager.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) 2005 Novell, Inc. (http://www.novell.com)
  21 //
  22 // Authors:
  23 //      Jackson Harper (jackson@ximian.com)
  24 //
  25 //
  26
  27
  28 using System;
  29 using System.Drawing;
  30 using System.Runtime.InteropServices;
  31
  32
  33 namespace System.Windows.Forms {
  34
  35         internal abstract class InternalWindowManager {
  36                 private TitleButtons title_buttons;
  37                 internal Form form;
  38
  39                 // moving windows
  40                 internal Point start;
  41                 internal State state;
  42                 protected Point clicked_point;
  43                 private FormPos sizing_edge;
  44                 internal Rectangle virtual_position;
  45
  46                 private Rectangle normal_bounds;
  47                 private Rectangle iconic_bounds;
  48
  49
  50                 public enum State {
  51                         Idle,
  52                         Moving,
  53                         Sizing,
  54                 }
  55
  56                 [Flags]
  57                 public enum FormPos {
  58                         None,
  59
  60                         TitleBar = 1,
  61
  62                         Top = 2,
  63                         Left = 4,
  64                         Right = 8,
  65                         Bottom = 16,
  66
  67                         TopLeft = Top | Left,
  68                         TopRight = Top | Right,
  69
  70                         BottomLeft = Bottom | Left,
  71                         BottomRight = Bottom | Right,
  72
  73                         AnyEdge = Top | Left | Right | Bottom,
  74                 }
  75
  76                 public InternalWindowManager (Form form)
  77                 {
  78                         this.form = form;
  79
  80                         form.SizeChanged += new EventHandler (FormSizeChangedHandler);
  81
  82                         title_buttons = new TitleButtons (form);
  83                         ThemeEngine.Current.ManagedWindowSetButtonLocations (this);
  84                 }
  85
  86                 public Form Form {
  87                         get { return form; }
  88                 }
  89
  90                 public int IconWidth {
  91                         get { return TitleBarHeight - 5; }
  92                 }
  93
  94                 public TitleButtons TitleButtons {
  95                         get {
  96                                 return title_buttons;
  97                         }
  98                 }
  99                 internal Rectangle NormalBounds {
 100                         get {
 101                                 return normal_bounds;
 102                         }
 103                         set {
 104                                 normal_bounds = value;
 105                         }
 106                 }
 107                 internal Size IconicSize {
 108                         get {
 109                                 return SystemInformation.MinimizedWindowSize;
 110                         }
 111                 }
 112
 113                 internal Rectangle IconicBounds {
 114                         get {
 115                                 if (iconic_bounds == Rectangle.Empty)
 116                                         return Rectangle.Empty;
 117                                 Rectangle result = iconic_bounds;
 118                                 result.Y = Form.Parent.ClientRectangle.Bottom - iconic_bounds.Y;
 119                                 return result;
 120                         }
 121                         set {
 122                                 iconic_bounds = value;
 123                                 iconic_bounds.Y = Form.Parent.ClientRectangle.Bottom - iconic_bounds.Y;
 124                         }
 125                 }
 126
 127                 internal virtual Rectangle MaximizedBounds {
 128                         get {
 129                                 return Form.Parent.ClientRectangle;
 130                         }
 131                 }
 132
 133                 public virtual void UpdateWindowState (FormWindowState old_window_state, FormWindowState new_window_state, bool force)
 134                 {
 135                         if (old_window_state == FormWindowState.Normal) {
 136                                 NormalBounds = form.Bounds;
 137                         } else if (old_window_state == FormWindowState.Minimized) {
 138                                 IconicBounds = form.Bounds;
 139                         }
 140
 141                         switch (new_window_state) {
 142                         case FormWindowState.Minimized:
 143                                 if (IconicBounds == Rectangle.Empty) {
 144                                         Size size = IconicSize;
 145                                         Point location = new Point (0, Form.Parent.ClientSize.Height - size.Height);
 146                                         IconicBounds = new Rectangle (location, size);
 147                                 }
 148                                 form.Bounds = IconicBounds;
 149                                 break;
 150                         case FormWindowState.Maximized:
 151                                 form.Bounds = MaximizedBounds;
 152                                 break;
 153                         case FormWindowState.Normal:
 154                                 form.Bounds = NormalBounds;
 155                                 break;
 156                         }
 157
 158                         UpdateWindowDecorations (new_window_state);
 159                         form.ResetCursor ();
 160                 }
 161
 162                 public virtual void UpdateWindowDecorations (FormWindowState window_state)
 163                 {
 164                         ThemeEngine.Current.ManagedWindowSetButtonLocations (this);
 165                         if (form.IsHandleCreated)
 166                                 XplatUI.RequestNCRecalc (form.Handle);
 167                 }
 168
 169                 public virtual bool WndProc (ref Message m)
 170                 {
 171 #if debug
 172                         Console.WriteLine(DateTime.Now.ToLongTimeString () + " " + this.GetType () .Name + " (Handle={0},Text={1}) received message {2}", form.IsHandleCreated ? form.Handle : IntPtr.Zero,  form.Text, m.ToString ());
 173 #endif
 174
 175                         switch ((Msg)m.Msg) {
 176
 177
 178                                 // The mouse handling messages are actually
 179                                 // not WM_NC* messages except for the first button and NCMOVEs
 180                                 // down because we capture on the form
 181
 182                         case Msg.WM_MOUSEMOVE:
 183                                 return HandleMouseMove (form, ref m);
 184
 185                         case Msg.WM_LBUTTONUP:
 186                                 HandleLButtonUp (ref m);
 187                                 break;
 188
 189                         case Msg.WM_RBUTTONDOWN:
 190                                 return HandleRButtonDown (ref m);
 191
 192                         case Msg.WM_LBUTTONDOWN:
 193                                 return HandleLButtonDown (ref m);
 194
 195                         case Msg.WM_LBUTTONDBLCLK:
 196                                 return HandleLButtonDblClick (ref m);
 197
 198                         case Msg.WM_PARENTNOTIFY:
 199                                 if (Control.LowOrder(m.WParam.ToInt32()) == (int) Msg.WM_LBUTTONDOWN)
 200                                         Activate ();
 201                                 break;
 202
 203                         case Msg.WM_NCHITTEST:
 204                                 return HandleNCHitTest (ref m);
 205
 206                                 // Return true from these guys, otherwise win32 will mess up z-order
 207                         case Msg.WM_NCLBUTTONUP:
 208                                 HandleNCLButtonUp (ref m);
 209                                 return true;
 210
 211                         case Msg.WM_NCLBUTTONDOWN:
 212                                 HandleNCLButtonDown (ref m);
 213                                 return true;
 214
 215                         case Msg.WM_NCMOUSEMOVE:
 216                                 HandleNCMouseMove (ref m);
 217                                 return true;
 218
 219                         case Msg.WM_NCLBUTTONDBLCLK:
 220                                 HandleNCLButtonDblClick (ref m);
 221                                 break;
 222
 223                         case Msg.WM_NCMOUSELEAVE:
 224                                 HandleNCMouseLeave (ref m);
 225                                 break;
 226
 227                         case Msg.WM_MOUSELEAVE:
 228                                 HandleMouseLeave (ref m);
 229                                 break;
 230
 231                         case Msg.WM_NCCALCSIZE:
 232                                 return HandleNCCalcSize (ref m);
 233
 234                         case Msg.WM_NCPAINT:
 235                                 return HandleNCPaint (ref m);
 236                         }
 237
 238                         return false;
 239                 }
 240
 241                 protected virtual bool HandleNCPaint (ref Message m)
 242                 {
 243                         PaintEventArgs pe = XplatUI.PaintEventStart (ref m, form.Handle, false);
 244
 245                         Rectangle clip;
 246
 247                         if (form.ActiveMenu != null) {
 248                                 Point pnt;
 249
 250                                 pnt = GetMenuOrigin ();
 251
 252                                 // The entire menu has to be in the clip rectangle because the
 253                                 // control buttons are right-aligned and otherwise they would
 254                                 // stay painted when the window gets resized.
 255                                 clip = new Rectangle (pnt.X, pnt.Y, form.ClientSize.Width, 0);
 256                                 clip = Rectangle.Union (clip, pe.ClipRectangle);
 257                                 pe.SetClip (clip);
 258                                 pe.Graphics.SetClip (clip);
 259
 260                                 form.ActiveMenu.Draw (pe, new Rectangle (pnt.X, pnt.Y, form.ClientSize.Width, 0));
 261                         }
 262                         // clip region is not correct on win32.
 263                         // use the entire form's area.
 264                         clip = new Rectangle (0, 0, form.Width, form.Height);
 265                         ThemeEngine.Current.DrawManagedWindowDecorations (pe.Graphics, clip, this);
 266                         XplatUI.PaintEventEnd (ref m, form.Handle, false);
 267                         return true;
 268                 }
 269
 270                 protected virtual bool HandleNCCalcSize (ref Message m)
 271                 {
 272                         XplatUIWin32.NCCALCSIZE_PARAMS ncp;
 273                         XplatUIWin32.RECT rect;
 274
 275                         if (m.WParam == (IntPtr)1) {
 276                                 ncp = (XplatUIWin32.NCCALCSIZE_PARAMS)Marshal.PtrToStructure (m.LParam,
 277                                                 typeof (XplatUIWin32.NCCALCSIZE_PARAMS));
 278
 279                                 ncp.rgrc1 = NCCalcSize (ncp.rgrc1);
 280
 281                                 Marshal.StructureToPtr (ncp, m.LParam, true);
 282                         } else {
 283                                 rect = (XplatUIWin32.RECT) Marshal.PtrToStructure (m.LParam, typeof (XplatUIWin32.RECT));
 284
 285                                 rect = NCCalcSize (rect);
 286
 287                                 Marshal.StructureToPtr (rect, m.LParam, true);
 288                         }
 289
 290                         return true;
 291                 }
 292
 293                 protected virtual XplatUIWin32.RECT NCCalcSize (XplatUIWin32.RECT proposed_window_rect)
 294                 {
 295                         int bw = ThemeEngine.Current.ManagedWindowBorderWidth (this);
 296
 297                         if (HasBorders) {
 298                                 proposed_window_rect.top += TitleBarHeight + bw;
 299                                 proposed_window_rect.bottom -= bw;
 300                                 proposed_window_rect.left += bw;
 301                                 proposed_window_rect.right -= bw;
 302                         }
 303
 304                         // This is necessary for Linux, can't handle <= 0-sized
 305                         // client areas correctly.
 306                         if (proposed_window_rect.right <= proposed_window_rect.left) {
 307                                 proposed_window_rect.right += proposed_window_rect.left - proposed_window_rect.right + 1;
 308                         }
 309                         if (proposed_window_rect.top >= proposed_window_rect.bottom) {
 310                                 proposed_window_rect.bottom += proposed_window_rect.top - proposed_window_rect.bottom + 1;
 311                         }
 312
 313                         return proposed_window_rect;
 314                 }
 315
 316                 protected virtual bool HandleNCHitTest (ref Message m)
 317                 {
 318
 319                         int x = Control.LowOrder ((int)m.LParam.ToInt32 ());
 320                         int y = Control.HighOrder ((int)m.LParam.ToInt32 ());
 321
 322                         NCPointToClient (ref x, ref y);
 323
 324                         FormPos pos = FormPosForCoords (x, y);
 325
 326                         if (pos == FormPos.TitleBar) {
 327                                 m.Result = new IntPtr ((int)HitTest.HTCAPTION);
 328                                 return true;
 329                         }
 330
 331                         if (!IsSizable)
 332                                 return false;
 333
 334                         switch (pos) {
 335                         case FormPos.Top:
 336                                 m.Result = new IntPtr ((int)HitTest.HTTOP);
 337                                 break;
 338                         case FormPos.Left:
 339                                 m.Result = new IntPtr ((int)HitTest.HTLEFT);
 340                                 break;
 341                         case FormPos.Right:
 342                                 m.Result = new IntPtr ((int)HitTest.HTRIGHT);
 343                                 break;
 344                         case FormPos.Bottom:
 345                                 m.Result = new IntPtr ((int)HitTest.HTBOTTOM);
 346                                 break;
 347                         case FormPos.TopLeft:
 348                                 m.Result = new IntPtr ((int)HitTest.HTTOPLEFT);
 349                                 break;
 350                         case FormPos.TopRight:
 351                                 m.Result = new IntPtr ((int)HitTest.HTTOPRIGHT);
 352                                 break;
 353                         case FormPos.BottomLeft:
 354                                 m.Result = new IntPtr ((int)HitTest.HTBOTTOMLEFT);
 355                                 break;
 356                         case FormPos.BottomRight:
 357                                 m.Result = new IntPtr ((int)HitTest.HTBOTTOMRIGHT);
 358                                 break;
 359                         default:
 360                                 // We return false so that DefWndProc handles things
 361                                 return false;
 362                         }
 363                         return true;
 364                 }
 365
 366                 public virtual void UpdateBorderStyle (FormBorderStyle border_style)
 367                 {
 368                         if (form.IsHandleCreated) {
 369                                 XplatUI.SetBorderStyle (form.Handle, border_style);
 370                         }
 371
 372                         if (ShouldRemoveWindowManager (border_style)) {
 373                                 form.RemoveWindowManager ();
 374                                 return;
 375                         }
 376
 377                         ThemeEngine.Current.ManagedWindowSetButtonLocations (this);
 378                 }
 379
 380
 381
 382                 public virtual void SetWindowState (FormWindowState old_state, FormWindowState window_state)
 383                 {
 384                         UpdateWindowState (old_state, window_state, false);
 385                 }
 386
 387                 public virtual FormWindowState GetWindowState ()
 388                 {
 389                         return form.window_state;
 390                 }
 391
 392                 public virtual void PointToClient (ref int x, ref int y)
 393                 {
 394                         // toolwindows stay in screencoords we just have to make sure
 395                         // they obey the working area
 396                         Rectangle working = SystemInformation.WorkingArea;
 397
 398                         if (x > working.Right)
 399                                 x = working.Right;
 400                         if (x < working.Left)
 401                                 x = working.Left;
 402
 403                         if (y < working.Top)
 404                                 y = working.Top;
 405                         if (y > working.Bottom)
 406                                 y = working.Bottom;
 407                 }
 408
 409                 public virtual void PointToScreen (ref int x, ref int y)
 410                 {
 411                         XplatUI.ClientToScreen (form.Handle, ref x, ref y);
 412                 }
 413
 414                 protected virtual bool ShouldRemoveWindowManager (FormBorderStyle style)
 415                 {
 416                         return style != FormBorderStyle.FixedToolWindow && style != FormBorderStyle.SizableToolWindow;
 417                 }
 418
 419                 public bool IconRectangleContains (int x, int y)
 420                 {
 421                         if (form.Icon == null)
 422                                 return false;
 423
 424                         int bw = ThemeEngine.Current.ManagedWindowBorderWidth (this);
 425                         Rectangle icon = new Rectangle (bw + 3, bw + 2, IconWidth, IconWidth);
 426                         return icon.Contains (x, y);
 427                 }
 428
 429                 protected virtual void Activate ()
 430                 {
 431                         form.Refresh ();
 432                 }
 433
 434                 public virtual bool IsActive {
 435                         get {
 436                                 return true;
 437                         }
 438                 }
 439
 440
 441                 private void FormSizeChangedHandler (object sender, EventArgs e)
 442                 {
 443                         if (form.IsHandleCreated) {
 444                                 ThemeEngine.Current.ManagedWindowSetButtonLocations (this);
 445                                 XplatUI.InvalidateNC (form.Handle);
 446                         }
 447                 }
 448
 449                 protected virtual bool HandleRButtonDown (ref Message m)
 450                 {
 451                         Activate ();
 452                         return false;
 453                 }
 454
 455                 protected virtual bool HandleLButtonDown (ref Message m)
 456                 {
 457                         Activate ();
 458                         return false;
 459                 }
 460
 461                 protected virtual bool HandleLButtonDblClick(ref Message m)
 462                 {
 463                         return false;
 464                 }
 465
 466                 protected virtual bool HandleNCMouseLeave (ref Message m)
 467                 {
 468                         int x = Control.LowOrder ((int)m.LParam.ToInt32 ());
 469                         int y = Control.HighOrder ((int)m.LParam.ToInt32 ());
 470
 471                         NCPointToClient (ref x, ref y);
 472                         FormPos pos = FormPosForCoords (x, y);
 473
 474                         if (pos != FormPos.TitleBar) {
 475                                 HandleTitleBarLeave (x, y);
 476                                 return true;
 477                         }
 478
 479                         return true;
 480                 }
 481
 482                 protected virtual bool HandleNCMouseMove (ref Message m)
 483                 {
 484                         int x = Control.LowOrder((int)m.LParam.ToInt32( ));
 485                         int y = Control.HighOrder((int)m.LParam.ToInt32( ));
 486
 487                         NCPointToClient (ref x, ref y);
 488                         FormPos pos = FormPosForCoords (x, y);
 489
 490                         if (pos == FormPos.TitleBar) {
 491                                 HandleTitleBarMouseMove (x, y);
 492                                 return true;
 493                         }
 494
 495                         if (form.ActiveMenu != null && XplatUI.IsEnabled (form.Handle)) {
 496                                 MouseEventArgs mea = new MouseEventArgs (Form.FromParamToMouseButtons (m.WParam.ToInt32 ()), form.mouse_clicks, x, y, 0);
 497                                 form.ActiveMenu.OnMouseMove (form, mea);
 498                         }
 499
 500                         return true;
 501
 502                 }
 503
 504                 protected virtual bool HandleNCLButtonDown (ref Message m)
 505                 {
 506                         Activate ();
 507
 508                         start = Cursor.Position;
 509                         virtual_position = form.Bounds;
 510
 511                         int x = Control.LowOrder ((int) m.LParam.ToInt32 ());
 512                         int y = Control.HighOrder ((int) m.LParam.ToInt32 ());
 513
 514                         // Need to adjust because we are in NC land
 515                         NCPointToClient (ref x, ref y);
 516                         FormPos pos = FormPosForCoords (x, y);
 517
 518                         if (form.ActiveMenu != null && XplatUI.IsEnabled (form.Handle)) {
 519                                 MouseEventArgs mea = new MouseEventArgs (Form.FromParamToMouseButtons (m.WParam.ToInt32 ()), form.mouse_clicks, x, y - TitleBarHeight, 0);
 520                                 form.ActiveMenu.OnMouseDown (form, mea);
 521                         }
 522
 523                         if (pos == FormPos.TitleBar) {
 524                                 HandleTitleBarDown (x, y);
 525                                 return true;
 526                         }
 527
 528                         if (IsSizable) {
 529                                 if ((pos & FormPos.AnyEdge) == 0)
 530                                         return false;
 531
 532                                 virtual_position = form.Bounds;
 533                                 state = State.Sizing;
 534                                 sizing_edge = pos;
 535                                 form.Capture = true;
 536                                 return true;
 537                         }
 538
 539                         return false;
 540                 }
 541
 542                 protected virtual void HandleNCLButtonDblClick (ref Message m)
 543                 {
 544                         int x = Control.LowOrder ((int)m.LParam.ToInt32 ());
 545                         int y = Control.HighOrder ((int)m.LParam.ToInt32 ());
 546
 547                         // Need to adjust because we are in NC land
 548                         NCPointToClient (ref x, ref y);
 549
 550                         FormPos pos = FormPosForCoords (x, y);
 551                         if (pos == FormPos.TitleBar || pos == FormPos.Top)
 552                                 HandleTitleBarDoubleClick (x, y);
 553
 554                 }
 555
 556                 protected virtual void HandleTitleBarDoubleClick (int x, int y)
 557                 {
 558
 559                 }
 560
 561                 protected virtual void HandleTitleBarLeave (int x, int y)
 562                 {
 563                         title_buttons.MouseLeave (x, y);
 564                 }
 565
 566                 protected virtual void HandleTitleBarMouseMove (int x, int y)
 567                 {
 568                         bool any_change = false;
 569
 570                         any_change = title_buttons.MouseMove (x, y);
 571
 572                         if (any_change) {
 573                                 if (IsMaximized && form.IsMdiChild)
 574                                         XplatUI.InvalidateNC (form.MdiParent.Handle);
 575                                 else
 576                                         XplatUI.InvalidateNC (form.Handle);
 577                         }
 578                 }
 579
 580                 protected virtual void HandleTitleBarUp (int x, int y)
 581                 {
 582                         title_buttons.MouseUp (x, y);
 583
 584                         return;
 585                 }
 586
 587                 protected virtual void HandleTitleBarDown (int x, int y)
 588                 {
 589                         title_buttons.MouseDown (x, y);
 590
 591                         if (!TitleButtons.AnyPushedTitleButtons && !IsMaximized) {
 592                                 state = State.Moving;
 593                                 clicked_point = new Point (x, y);
 594                                 if (form.Parent != null) {
 595                                         form.CaptureWithConfine (form.Parent);
 596                                 } else {
 597                                         form.Capture = true;
 598                                 }
 599                         }
 600
 601                         XplatUI.InvalidateNC (form.Handle);
 602                 }
 603
 604                 private bool HandleMouseMove (Form form, ref Message m)
 605                 {
 606                         switch (state) {
 607                         case State.Moving:
 608                                 HandleWindowMove (m);
 609                                 return true;
 610                         case State.Sizing:
 611                                 HandleSizing (m);
 612                                 return true;
 613                         }
 614
 615                         return false;
 616                 }
 617
 618                 private void HandleMouseLeave (ref Message m)
 619                 {
 620                         form.ResetCursor ();
 621                 }
 622
 623                 protected virtual void HandleWindowMove (Message m)
 624                 {
 625                         Point move = MouseMove (m);
 626
 627                         UpdateVP (virtual_position.X + move.X, virtual_position.Y + move.Y,
 628                                         virtual_position.Width, virtual_position.Height);
 629                 }
 630
 631                 private void HandleSizing (Message m)
 632                 {
 633                         Rectangle pos = virtual_position;
 634                         Size minimum_size = SystemInformation.MinWindowTrackSize;
 635                         int mw = minimum_size.Width;
 636                         int mh = minimum_size.Height;
 637                         int x = Cursor.Position.X;
 638                         int y = Cursor.Position.Y;
 639
 640                         PointToClient (ref x, ref y);
 641
 642                         if ((sizing_edge & FormPos.Top) != 0) {
 643                                 if (pos.Bottom - y < mh)
 644                                         y = pos.Bottom - mh;
 645                                 pos.Height = pos.Bottom - y;
 646                                 pos.Y = y;
 647                         } else if ((sizing_edge & FormPos.Bottom) != 0) {
 648                                 int height = y - pos.Top;
 649                                 if (height <= mh)
 650                                         height = mh;
 651                                 pos.Height = height;
 652                         }
 653
 654                         if ((sizing_edge & FormPos.Left) != 0) {
 655                                 if (pos.Right - x < mw)
 656                                         x = pos.Right - mw;
 657                                 pos.Width = pos.Right - x;
 658                                 pos.X = x;
 659                         } else if ((sizing_edge & FormPos.Right) != 0) {
 660                                 int width = x - form.Left;
 661                                 if (width <= mw)
 662                                         width = mw;
 663                                 pos.Width = width;
 664                         }
 665
 666                         UpdateVP (pos);
 667                 }
 668
 669                 public bool IsMaximized {
 670                         get { return GetWindowState () == FormWindowState.Maximized; }
 671                 }
 672
 673                 public bool IsMinimized {
 674                         get { return GetWindowState () == FormWindowState.Minimized; }
 675                 }
 676
 677                 public bool IsSizable {
 678                         get {
 679                                 switch (form.FormBorderStyle) {
 680                                 case FormBorderStyle.Sizable:
 681                                 case FormBorderStyle.SizableToolWindow:
 682                                         return (form.window_state != FormWindowState.Minimized);
 683                                 default:
 684                                         return false;
 685                                 }
 686                         }
 687                 }
 688
 689                 public bool HasBorders {
 690                         get {
 691                                 return form.FormBorderStyle != FormBorderStyle.None;
 692                         }
 693                 }
 694
 695                 public bool IsToolWindow {
 696                         get {
 697                                 if (form.FormBorderStyle == FormBorderStyle.SizableToolWindow ||
 698                                                 form.FormBorderStyle == FormBorderStyle.FixedToolWindow)
 699                                         return true;
 700                                 return false;
 701                         }
 702                 }
 703
 704                 public int TitleBarHeight {
 705                         get {
 706                                 return ThemeEngine.Current.ManagedWindowTitleBarHeight (this);
 707                         }
 708                 }
 709
 710                 public int BorderWidth {
 711                         get {
 712                                 return ThemeEngine.Current.ManagedWindowBorderWidth (this);
 713                         }
 714                 }
 715
 716                 public virtual int MenuHeight {
 717                         get {
 718                                 return (form.Menu != null ? ThemeEngine.Current.MenuHeight : 0);
 719                         }
 720                 }
 721
 722                 protected void UpdateVP (Rectangle r)
 723                 {
 724                         UpdateVP (r.X, r.Y, r.Width, r.Height);
 725                 }
 726
 727                 protected void UpdateVP (Point loc, int w, int h)
 728                 {
 729                         UpdateVP (loc.X, loc.Y, w, h);
 730                 }
 731
 732                 protected void UpdateVP (int x, int y, int w, int h)
 733                 {
 734                         virtual_position.X = x;
 735                         virtual_position.Y = y;
 736                         virtual_position.Width = w;
 737                         virtual_position.Height = h;
 738
 739                         DrawVirtualPosition (virtual_position);
 740                 }
 741
 742                 protected virtual void HandleLButtonUp (ref Message m)
 743                 {
 744                         if (state == State.Idle)
 745                                 return;
 746
 747                         ClearVirtualPosition ();
 748
 749                         form.Capture = false;
 750                         if (state == State.Moving && form.Location != virtual_position.Location)
 751                                 form.Location = virtual_position.Location;
 752                         else if (state == State.Sizing && form.Bounds != virtual_position)
 753                                 form.Bounds = virtual_position;
 754                         state = State.Idle;
 755
 756                         OnWindowFinishedMoving ();
 757                 }
 758
 759                 private bool HandleNCLButtonUp (ref Message m)
 760                 {
 761                         if (form.Capture) {
 762                                 ClearVirtualPosition ();
 763
 764                                 form.Capture = false;
 765                                 state = State.Idle;
 766                                 if (form.MdiContainer != null)
 767                                         form.MdiContainer.SizeScrollBars();
 768                         }
 769
 770                         int x = Control.LowOrder ((int) m.LParam.ToInt32 ());
 771                         int y = Control.HighOrder ((int) m.LParam.ToInt32 ());
 772
 773                         NCPointToClient (ref x, ref y);
 774                         FormPos pos = FormPosForCoords (x, y);
 775
 776                         if (pos == FormPos.TitleBar) {
 777                                 HandleTitleBarUp (x, y);
 778                                 return true;
 779                         }
 780
 781                         return true;
 782                 }
 783
 784                 protected void DrawTitleButton (Graphics dc, TitleButton button, Rectangle clip)
 785                 {
 786                         if (!button.Rectangle.IntersectsWith (clip))
 787                                 return;
 788
 789                         dc.FillRectangle (SystemBrushes.Control, button.Rectangle);
 790                         ControlPaint.DrawCaptionButton (dc, button.Rectangle,
 791                                         button.Caption, button.State);
 792                 }
 793
 794                 public virtual void DrawMaximizedButtons (object sender, PaintEventArgs pe)
 795                 {
 796                 }
 797
 798                 protected Point MouseMove (Message m)
 799                 {
 800                         Point cp = Cursor.Position;
 801                         return new Point (cp.X - start.X, cp.Y - start.Y);
 802                 }
 803
 804                 protected virtual void DrawVirtualPosition (Rectangle virtual_position)
 805                 {
 806                         form.Bounds = virtual_position;
 807                         start = Cursor.Position;
 808                 }
 809
 810                 protected virtual void ClearVirtualPosition ()
 811                 {
 812
 813                 }
 814
 815                 protected virtual void OnWindowFinishedMoving ()
 816                 {
 817                 }
 818
 819                 protected virtual void NCPointToClient(ref int x, ref int y) {
 820                         form.PointToClient(ref x, ref y);
 821                         NCClientToNC (ref x, ref y);
 822                 }
 823
 824                 protected virtual void NCClientToNC (ref int x, ref int y) {
 825                         y += TitleBarHeight;
 826                         y += BorderWidth;
 827                         y += MenuHeight;
 828                 }
 829
 830                 internal Point GetMenuOrigin ()
 831                 {
 832                         return new Point (BorderWidth, BorderWidth + TitleBarHeight);
 833                 }
 834
 835                 protected FormPos FormPosForCoords (int x, int y)
 836                 {
 837                         int bw = BorderWidth;
 838                         if (y < TitleBarHeight + bw) {
 839                                 //      Console.WriteLine ("A");
 840                                 if (y > bw && x > bw &&
 841                                                 x < form.Width - bw)
 842                                         return FormPos.TitleBar;
 843
 844                                 if (x < bw || (x < 20 && y < bw))
 845                                         return FormPos.TopLeft;
 846
 847                                 if (x > form.Width - bw ||
 848                                         (x > form.Width - 20 && y < bw))
 849                                         return FormPos.TopRight;
 850
 851                                 if (y < bw)
 852                                         return FormPos.Top;
 853
 854                         } else if (y > form.Height - 20) {
 855                                 //      Console.WriteLine ("B");
 856                                 if (x < bw ||
 857                                                 (x < 20 && y > form.Height - bw))
 858                                         return FormPos.BottomLeft;
 859
 860                                 if (x > form.Width - (bw * 2) ||
 861                                                 (x > form.Width - 20 &&
 862                                                  y > form.Height - bw))
 863                                         return FormPos.BottomRight;
 864
 865                                 if (y > form.Height - (bw * 2))
 866                                         return FormPos.Bottom;
 867
 868
 869                         } else if (x < bw) {
 870                                 //      Console.WriteLine ("C");
 871                                 return FormPos.Left;
 872                         } else if (x > form.Width - (bw * 2)) {
 873 //                              Console.WriteLine ("D");
 874                                 return FormPos.Right;
 875                         } else {
 876                                 //                      Console.WriteLine ("E   {0}", form.Width - bw);
 877                         }
 878
 879                         return FormPos.None;
 880                 }
 881         }
 882         internal class TitleButton
 883         {
 884                 public Rectangle Rectangle;
 885                 public ButtonState State;
 886                 public CaptionButton Caption;
 887                 private EventHandler Clicked;
 888                 public bool Visible;
 889
 890                 public TitleButton (CaptionButton caption, EventHandler clicked)
 891                 {
 892                         Caption = caption;
 893                         Clicked = clicked;
 894                 }
 895
 896                 public void OnClick ()
 897                 {
 898                         if (Clicked != null) {
 899                                 Clicked (this, EventArgs.Empty);
 900                         }
 901                 }
 902         }
 903
 904         internal class TitleButtons : System.Collections.IEnumerable
 905         {
 906                 public TitleButton MinimizeButton;
 907                 public TitleButton MaximizeButton;
 908                 public TitleButton RestoreButton;
 909                 public TitleButton CloseButton;
 910                 public TitleButton HelpButton;
 911
 912                 public TitleButton [] AllButtons;
 913                 public bool Visible;
 914
 915                 private ToolTip.ToolTipWindow tooltip;
 916                 private Timer tooltip_timer;
 917                 private TitleButton tooltip_hovered_button;
 918                 private TitleButton tooltip_hidden_button;
 919                 private const int tooltip_hide_interval = 3000;
 920                 private const int tooltip_show_interval = 1000;
 921                 private Form form;
 922
 923                 public TitleButtons (Form frm)
 924                 {
 925                         this.form = frm;
 926                         this.Visible = true;
 927
 928                         MinimizeButton = new TitleButton (CaptionButton.Minimize, new EventHandler (ClickHandler));
 929                         MaximizeButton = new TitleButton (CaptionButton.Maximize, new EventHandler (ClickHandler));
 930                         RestoreButton = new TitleButton (CaptionButton.Restore, new EventHandler (ClickHandler));
 931                         CloseButton = new TitleButton (CaptionButton.Close, new EventHandler (ClickHandler));
 932                         HelpButton = new TitleButton (CaptionButton.Help, new EventHandler (ClickHandler));
 933
 934                         AllButtons = new TitleButton [] { MinimizeButton, MaximizeButton, RestoreButton, CloseButton, HelpButton };
 935                 }
 936
 937                 private void ClickHandler (object sender, EventArgs e)
 938                 {
 939                         if (!Visible) {
 940                                 return;
 941                         }
 942
 943                         TitleButton button = (TitleButton) sender;
 944
 945                         switch (button.Caption) {
 946                                 case CaptionButton.Close:
 947                                         form.Close ();
 948                                         break;
 949                                 case CaptionButton.Help:
 950                                         Console.WriteLine ("Help not implemented.");
 951                                         break;
 952                                 case CaptionButton.Maximize:
 953                                         form.WindowState = FormWindowState.Maximized;
 954                                         break;
 955                                 case CaptionButton.Minimize:
 956                                         form.WindowState = FormWindowState.Minimized;
 957                                         break;
 958                                 case CaptionButton.Restore:
 959                                         form.WindowState = FormWindowState.Normal;
 960                                         break;
 961                         }
 962                 }
 963
 964                 public TitleButton FindButton (int x, int y)
 965                 {
 966                         if (!Visible) {
 967                                 return null;
 968                         }
 969
 970                         foreach (TitleButton button in AllButtons) {
 971                                 if (button.Visible && button.Rectangle.Contains (x, y)) {
 972                                         return button;
 973                                 }
 974                         }
 975                         return null;
 976                 }
 977
 978                 public bool AnyPushedTitleButtons {
 979                         get {
 980                                 if (!Visible) {
 981                                         return false;
 982                                 }
 983
 984                                 foreach (TitleButton button in AllButtons) {
 985                                         if (button.Visible && button.State == ButtonState.Pushed) {
 986                                                 return true;
 987                                         }
 988                                 }
 989                                 return false;
 990                         }
 991                 }
 992
 993                 #region IEnumerable Members
 994
 995                 public System.Collections.IEnumerator GetEnumerator ()
 996                 {
 997                         return AllButtons.GetEnumerator ();
 998                 }
 999                 #endregion
1000
1001                 #region ToolTip helpers
1002                 // Called from MouseMove if mouse is over a button
1003                 public void ToolTipStart (TitleButton button)
1004                 {
1005                         tooltip_hovered_button = button;
1006
1007                         if (tooltip_hovered_button == tooltip_hidden_button)
1008                                 return;
1009                         tooltip_hidden_button = null;
1010
1011                         if (tooltip != null && tooltip.Visible)
1012                                 ToolTipShow (true);
1013
1014                         if (tooltip_timer == null) {
1015
1016                                 tooltip_timer = new Timer ();
1017                                 tooltip_timer.Tick += new EventHandler (ToolTipTimerTick);
1018                         }
1019
1020                         tooltip_timer.Interval = tooltip_show_interval;
1021                         tooltip_timer.Start ();
1022                         tooltip_hovered_button = button;
1023                 }
1024
1025                 public void ToolTipTimerTick (object sender, EventArgs e)
1026                 {
1027                         if (tooltip_timer.Interval == tooltip_hide_interval) {
1028                                 tooltip_hidden_button = tooltip_hovered_button;
1029                                 ToolTipHide (false);
1030                         } else {
1031                                 ToolTipShow (false);
1032                         }
1033                 }
1034                 // Called from timer (with only_refresh = false)
1035                 // Called from ToolTipStart if tooltip is already shown (with only_refresh = true)
1036                 public void ToolTipShow (bool only_refresh)
1037                 {
1038                         if (!form.Visible)
1039                                 return;
1040
1041                         string text = Locale.GetText (tooltip_hovered_button.Caption.ToString ());
1042
1043                         tooltip_timer.Interval = tooltip_hide_interval;
1044                         tooltip_timer.Enabled = true;
1045
1046                         if (only_refresh && (tooltip == null || !tooltip.Visible)) {
1047                                 return;
1048                         }
1049
1050                         if (tooltip == null)
1051                                 tooltip = new ToolTip.ToolTipWindow ();
1052                         else if (tooltip.Text == text && tooltip.Visible)
1053                                 return;
1054                         else if (tooltip.Visible)
1055                                 tooltip.Visible = false;
1056
1057                         if (form.WindowState == FormWindowState.Maximized && form.MdiParent != null)
1058                                 tooltip.Present (form.MdiParent, text);
1059                         else
1060                                 tooltip.Present (form, text);
1061
1062                 }
1063
1064                 // Called from MouseLeave (with reset_hidden_button = true)
1065                 // Called from MouseDown  (with reset_hidden_button = false)
1066                 // Called from MouseMove if mouse isn't over any button (with reset_hidden_button = false)
1067                 // Called from Timer if hiding (with reset_hidden_button = false)
1068                 public void ToolTipHide (bool reset_hidden_button)
1069                 {
1070                         if (tooltip_timer != null)
1071                                 tooltip_timer.Enabled = false;
1072                         if (tooltip != null && tooltip.Visible)
1073                                 tooltip.Visible = false;
1074                         if (reset_hidden_button)
1075                                 tooltip_hidden_button = null;
1076                 }
1077                 #endregion
1078
1079                 public bool MouseMove (int x, int y)
1080                 {
1081                         if (!Visible) {
1082                                 return false;
1083                         }
1084
1085                         bool any_change = false;
1086                         bool any_pushed_buttons = AnyPushedTitleButtons;
1087                         bool any_tooltip = false;
1088                         TitleButton over_button = FindButton (x, y);
1089
1090                         foreach (TitleButton button in this) {
1091                                 if (button == null)
1092                                         continue;
1093
1094                                 if (button == over_button) {
1095                                         if (any_pushed_buttons) {
1096                                                 any_change |= button.State != ButtonState.Pushed;
1097                                                 button.State = ButtonState.Pushed;
1098                                         }
1099                                         ToolTipStart (button);
1100                                         any_tooltip = true;
1101                                 } else {
1102                                         if (any_pushed_buttons) {
1103                                                 any_change |= button.State != ButtonState.Normal;
1104                                                 button.State = ButtonState.Normal;
1105                                         }
1106                                 }
1107                         }
1108
1109                         if (!any_tooltip)
1110                                 ToolTipHide (false);
1111
1112                         return any_change;
1113                 }
1114
1115                 public void MouseDown (int x, int y)
1116                 {
1117                         if (!Visible) {
1118                                 return;
1119                         }
1120
1121                         ToolTipHide (false);
1122
1123                         foreach (TitleButton button in this) {
1124                                 if (button != null) {
1125                                         button.State = ButtonState.Normal;
1126                                 }
1127                         }
1128                         TitleButton clicked_button = FindButton (x, y);
1129                         if (clicked_button != null) {
1130                                 clicked_button.State = ButtonState.Pushed;
1131                         }
1132                 }
1133
1134                 public void MouseUp (int x, int y)
1135                 {
1136                         if (!Visible) {
1137                                 return;
1138                         }
1139
1140                         TitleButton clicked_button = FindButton (x, y);
1141                         if (clicked_button != null) {
1142                                 clicked_button.OnClick ();
1143                         }
1144
1145                         foreach (TitleButton button in this) {
1146                                 if (button == null)
1147                                         continue;
1148
1149                                 button.State = ButtonState.Normal;
1150                         }
1151
1152                         if (clicked_button == CloseButton && !form.closing)
1153                                 XplatUI.InvalidateNC (form.Handle);
1154                 }
1155
1156                 internal void MouseLeave (int x, int y)
1157                 {
1158                         if (!Visible) {
1159                                 return;
1160                         }
1161
1162                         foreach (TitleButton button in this) {
1163                                 if (button == null)
1164                                         continue;
1165
1166                                 button.State = ButtonState.Normal;
1167                         }
1168
1169                         ToolTipHide (true);
1170                 }
1171         }
1172 }
1173
1174