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                         if (HasBorders || IsMinimized) {
 263                                 // clip region is not correct on win32.
 264                                 // use the entire form's area.
 265                                 clip = new Rectangle (0, 0, form.Width, form.Height);
 266                                 ThemeEngine.Current.DrawManagedWindowDecorations (pe.Graphics, clip, this);
 267                         }
 268                         XplatUI.PaintEventEnd (ref m, form.Handle, false);
 269                         return true;
 270                 }
 271
 272                 protected virtual bool HandleNCCalcSize (ref Message m)
 273                 {
 274                         XplatUIWin32.NCCALCSIZE_PARAMS ncp;
 275                         XplatUIWin32.RECT rect;
 276
 277                         if (m.WParam == (IntPtr)1) {
 278                                 ncp = (XplatUIWin32.NCCALCSIZE_PARAMS)Marshal.PtrToStructure (m.LParam,
 279                                                 typeof (XplatUIWin32.NCCALCSIZE_PARAMS));
 280
 281                                 ncp.rgrc1 = NCCalcSize (ncp.rgrc1);
 282
 283                                 Marshal.StructureToPtr (ncp, m.LParam, true);
 284                         } else {
 285                                 rect = (XplatUIWin32.RECT) Marshal.PtrToStructure (m.LParam, typeof (XplatUIWin32.RECT));
 286
 287                                 rect = NCCalcSize (rect);
 288
 289                                 Marshal.StructureToPtr (rect, m.LParam, true);
 290                         }
 291
 292                         return true;
 293                 }
 294
 295                 protected virtual XplatUIWin32.RECT NCCalcSize (XplatUIWin32.RECT proposed_window_rect)
 296                 {
 297                         int bw = ThemeEngine.Current.ManagedWindowBorderWidth (this);
 298
 299                         if (HasBorders) {
 300                                 proposed_window_rect.top += TitleBarHeight + bw;
 301                                 proposed_window_rect.bottom -= bw;
 302                                 proposed_window_rect.left += bw;
 303                                 proposed_window_rect.right -= bw;
 304                         }
 305
 306                         if (XplatUI.RequiresPositiveClientAreaSize) {
 307                                 // This is necessary for Linux, can't handle <= 0-sized
 308                                 // client areas correctly.
 309                                 if (proposed_window_rect.right <= proposed_window_rect.left) {
 310                                         proposed_window_rect.right += proposed_window_rect.left - proposed_window_rect.right + 1;
 311                                 }
 312                                 if (proposed_window_rect.top >= proposed_window_rect.bottom) {
 313                                         proposed_window_rect.bottom += proposed_window_rect.top - proposed_window_rect.bottom + 1;
 314                                 }
 315                         }
 316
 317                         return proposed_window_rect;
 318                 }
 319
 320                 protected virtual bool HandleNCHitTest (ref Message m)
 321                 {
 322
 323                         int x = Control.LowOrder ((int)m.LParam.ToInt32 ());
 324                         int y = Control.HighOrder ((int)m.LParam.ToInt32 ());
 325
 326                         NCPointToClient (ref x, ref y);
 327
 328                         FormPos pos = FormPosForCoords (x, y);
 329
 330                         if (pos == FormPos.TitleBar) {
 331                                 m.Result = new IntPtr ((int)HitTest.HTCAPTION);
 332                                 return true;
 333                         }
 334
 335                         if (!IsSizable)
 336                                 return false;
 337
 338                         switch (pos) {
 339                         case FormPos.Top:
 340                                 m.Result = new IntPtr ((int)HitTest.HTTOP);
 341                                 break;
 342                         case FormPos.Left:
 343                                 m.Result = new IntPtr ((int)HitTest.HTLEFT);
 344                                 break;
 345                         case FormPos.Right:
 346                                 m.Result = new IntPtr ((int)HitTest.HTRIGHT);
 347                                 break;
 348                         case FormPos.Bottom:
 349                                 m.Result = new IntPtr ((int)HitTest.HTBOTTOM);
 350                                 break;
 351                         case FormPos.TopLeft:
 352                                 m.Result = new IntPtr ((int)HitTest.HTTOPLEFT);
 353                                 break;
 354                         case FormPos.TopRight:
 355                                 m.Result = new IntPtr ((int)HitTest.HTTOPRIGHT);
 356                                 break;
 357                         case FormPos.BottomLeft:
 358                                 m.Result = new IntPtr ((int)HitTest.HTBOTTOMLEFT);
 359                                 break;
 360                         case FormPos.BottomRight:
 361                                 m.Result = new IntPtr ((int)HitTest.HTBOTTOMRIGHT);
 362                                 break;
 363                         default:
 364                                 // We return false so that DefWndProc handles things
 365                                 return false;
 366                         }
 367                         return true;
 368                 }
 369
 370                 public virtual void UpdateBorderStyle (FormBorderStyle border_style)
 371                 {
 372                         if (form.IsHandleCreated) {
 373                                 XplatUI.SetBorderStyle (form.Handle, border_style);
 374                         }
 375
 376                         if (ShouldRemoveWindowManager (border_style)) {
 377                                 form.RemoveWindowManager ();
 378                                 return;
 379                         }
 380
 381                         ThemeEngine.Current.ManagedWindowSetButtonLocations (this);
 382                 }
 383
 384
 385
 386                 public virtual void SetWindowState (FormWindowState old_state, FormWindowState window_state)
 387                 {
 388                         UpdateWindowState (old_state, window_state, false);
 389                 }
 390
 391                 public virtual FormWindowState GetWindowState ()
 392                 {
 393                         return form.window_state;
 394                 }
 395
 396                 public virtual void PointToClient (ref int x, ref int y)
 397                 {
 398                         // toolwindows stay in screencoords we just have to make sure
 399                         // they obey the working area
 400                         Rectangle working = SystemInformation.WorkingArea;
 401
 402                         if (x > working.Right)
 403                                 x = working.Right;
 404                         if (x < working.Left)
 405                                 x = working.Left;
 406
 407                         if (y < working.Top)
 408                                 y = working.Top;
 409                         if (y > working.Bottom)
 410                                 y = working.Bottom;
 411                 }
 412
 413                 public virtual void PointToScreen (ref int x, ref int y)
 414                 {
 415                         XplatUI.ClientToScreen (form.Handle, ref x, ref y);
 416                 }
 417
 418                 protected virtual bool ShouldRemoveWindowManager (FormBorderStyle style)
 419                 {
 420                         return style != FormBorderStyle.FixedToolWindow && style != FormBorderStyle.SizableToolWindow;
 421                 }
 422
 423                 public bool IconRectangleContains (int x, int y)
 424                 {
 425                         if (!ShowIcon)
 426                                 return false;
 427
 428                         Rectangle icon = ThemeEngine.Current.ManagedWindowGetTitleBarIconArea (this);
 429                         return icon.Contains (x, y);
 430                 }
 431
 432                 public bool ShowIcon {
 433                         get {
 434 #if NET_2_0
 435                                 if (!Form.ShowIcon)
 436                                         return false;
 437 #endif
 438                                 if (!HasBorders)
 439                                         return false;
 440                                 if (IsMinimized)
 441                                         return true;
 442                                 if (IsToolWindow || Form.FormBorderStyle == FormBorderStyle.FixedDialog)
 443                                         return false;
 444                                 return true;
 445                         }
 446                 }
 447
 448                 protected virtual void Activate ()
 449                 {
 450                         form.Refresh ();
 451                 }
 452
 453                 public virtual bool IsActive {
 454                         get {
 455                                 return true;
 456                         }
 457                 }
 458
 459
 460                 private void FormSizeChangedHandler (object sender, EventArgs e)
 461                 {
 462                         if (form.IsHandleCreated) {
 463                                 ThemeEngine.Current.ManagedWindowSetButtonLocations (this);
 464                                 XplatUI.InvalidateNC (form.Handle);
 465                         }
 466                 }
 467
 468                 protected virtual bool HandleRButtonDown (ref Message m)
 469                 {
 470                         Activate ();
 471                         return false;
 472                 }
 473
 474                 protected virtual bool HandleLButtonDown (ref Message m)
 475                 {
 476                         Activate ();
 477                         return false;
 478                 }
 479
 480                 protected virtual bool HandleLButtonDblClick(ref Message m)
 481                 {
 482                         return false;
 483                 }
 484
 485                 protected virtual bool HandleNCMouseLeave (ref Message m)
 486                 {
 487                         int x = Control.LowOrder ((int)m.LParam.ToInt32 ());
 488                         int y = Control.HighOrder ((int)m.LParam.ToInt32 ());
 489
 490                         NCPointToClient (ref x, ref y);
 491                         FormPos pos = FormPosForCoords (x, y);
 492
 493                         if (pos != FormPos.TitleBar) {
 494                                 HandleTitleBarLeave (x, y);
 495                                 return true;
 496                         }
 497
 498                         return true;
 499                 }
 500
 501                 protected virtual bool HandleNCMouseMove (ref Message m)
 502                 {
 503                         int x = Control.LowOrder((int)m.LParam.ToInt32( ));
 504                         int y = Control.HighOrder((int)m.LParam.ToInt32( ));
 505
 506                         NCPointToClient (ref x, ref y);
 507                         FormPos pos = FormPosForCoords (x, y);
 508
 509                         if (pos == FormPos.TitleBar) {
 510                                 HandleTitleBarMouseMove (x, y);
 511                                 return true;
 512                         }
 513
 514                         if (form.ActiveMenu != null && XplatUI.IsEnabled (form.Handle)) {
 515                                 MouseEventArgs mea = new MouseEventArgs (Form.FromParamToMouseButtons (m.WParam.ToInt32 ()), form.mouse_clicks, x, y, 0);
 516                                 form.ActiveMenu.OnMouseMove (form, mea);
 517                         }
 518
 519                         return true;
 520
 521                 }
 522
 523                 protected virtual bool HandleNCLButtonDown (ref Message m)
 524                 {
 525                         Activate ();
 526
 527                         start = Cursor.Position;
 528                         virtual_position = form.Bounds;
 529
 530                         int x = Control.LowOrder ((int) m.LParam.ToInt32 ());
 531                         int y = Control.HighOrder ((int) m.LParam.ToInt32 ());
 532
 533                         // Need to adjust because we are in NC land
 534                         NCPointToClient (ref x, ref y);
 535                         FormPos pos = FormPosForCoords (x, y);
 536
 537                         if (form.ActiveMenu != null && XplatUI.IsEnabled (form.Handle)) {
 538                                 MouseEventArgs mea = new MouseEventArgs (Form.FromParamToMouseButtons (m.WParam.ToInt32 ()), form.mouse_clicks, x, y - TitleBarHeight, 0);
 539                                 form.ActiveMenu.OnMouseDown (form, mea);
 540                         }
 541
 542                         if (pos == FormPos.TitleBar) {
 543                                 HandleTitleBarDown (x, y);
 544                                 return true;
 545                         }
 546
 547                         if (IsSizable) {
 548                                 if ((pos & FormPos.AnyEdge) == 0)
 549                                         return false;
 550
 551                                 virtual_position = form.Bounds;
 552                                 state = State.Sizing;
 553                                 sizing_edge = pos;
 554                                 form.Capture = true;
 555                                 return true;
 556                         }
 557
 558                         return false;
 559                 }
 560
 561                 protected virtual void HandleNCLButtonDblClick (ref Message m)
 562                 {
 563                         int x = Control.LowOrder ((int)m.LParam.ToInt32 ());
 564                         int y = Control.HighOrder ((int)m.LParam.ToInt32 ());
 565
 566                         // Need to adjust because we are in NC land
 567                         NCPointToClient (ref x, ref y);
 568
 569                         FormPos pos = FormPosForCoords (x, y);
 570                         if (pos == FormPos.TitleBar || pos == FormPos.Top)
 571                                 HandleTitleBarDoubleClick (x, y);
 572
 573                 }
 574
 575                 protected virtual void HandleTitleBarDoubleClick (int x, int y)
 576                 {
 577
 578                 }
 579
 580                 protected virtual void HandleTitleBarLeave (int x, int y)
 581                 {
 582                         title_buttons.MouseLeave (x, y);
 583                 }
 584
 585                 protected virtual void HandleTitleBarMouseMove (int x, int y)
 586                 {
 587                         bool any_change = false;
 588
 589                         any_change = title_buttons.MouseMove (x, y);
 590
 591                         if (any_change) {
 592                                 if (IsMaximized && form.IsMdiChild)
 593                                         XplatUI.InvalidateNC (form.MdiParent.Handle);
 594                                 else
 595                                         XplatUI.InvalidateNC (form.Handle);
 596                         }
 597                 }
 598
 599                 protected virtual void HandleTitleBarUp (int x, int y)
 600                 {
 601                         title_buttons.MouseUp (x, y);
 602
 603                         return;
 604                 }
 605
 606                 protected virtual void HandleTitleBarDown (int x, int y)
 607                 {
 608                         title_buttons.MouseDown (x, y);
 609
 610                         if (!TitleButtons.AnyPushedTitleButtons && !IsMaximized) {
 611                                 state = State.Moving;
 612                                 clicked_point = new Point (x, y);
 613                                 if (form.Parent != null) {
 614                                         form.CaptureWithConfine (form.Parent);
 615                                 } else {
 616                                         form.Capture = true;
 617                                 }
 618                         }
 619
 620                         XplatUI.InvalidateNC (form.Handle);
 621                 }
 622
 623                 private bool HandleMouseMove (Form form, ref Message m)
 624                 {
 625                         switch (state) {
 626                         case State.Moving:
 627                                 HandleWindowMove (m);
 628                                 return true;
 629                         case State.Sizing:
 630                                 HandleSizing (m);
 631                                 return true;
 632                         }
 633
 634                         return false;
 635                 }
 636
 637                 private void HandleMouseLeave (ref Message m)
 638                 {
 639                         form.ResetCursor ();
 640                 }
 641
 642                 protected virtual void HandleWindowMove (Message m)
 643                 {
 644                         Point move = MouseMove (m);
 645
 646                         UpdateVP (virtual_position.X + move.X, virtual_position.Y + move.Y,
 647                                         virtual_position.Width, virtual_position.Height);
 648                 }
 649
 650                 private void HandleSizing (Message m)
 651                 {
 652                         Rectangle pos = virtual_position;
 653                         Size minimum_size = SystemInformation.MinWindowTrackSize;
 654                         int mw = minimum_size.Width;
 655                         int mh = minimum_size.Height;
 656                         int x = Cursor.Position.X;
 657                         int y = Cursor.Position.Y;
 658
 659                         PointToClient (ref x, ref y);
 660
 661                         if ((sizing_edge & FormPos.Top) != 0) {
 662                                 if (pos.Bottom - y < mh)
 663                                         y = pos.Bottom - mh;
 664                                 pos.Height = pos.Bottom - y;
 665                                 pos.Y = y;
 666                         } else if ((sizing_edge & FormPos.Bottom) != 0) {
 667                                 int height = y - pos.Top;
 668                                 if (height <= mh)
 669                                         height = mh;
 670                                 pos.Height = height;
 671                         }
 672
 673                         if ((sizing_edge & FormPos.Left) != 0) {
 674                                 if (pos.Right - x < mw)
 675                                         x = pos.Right - mw;
 676                                 pos.Width = pos.Right - x;
 677                                 pos.X = x;
 678                         } else if ((sizing_edge & FormPos.Right) != 0) {
 679                                 int width = x - form.Left;
 680                                 if (width <= mw)
 681                                         width = mw;
 682                                 pos.Width = width;
 683                         }
 684
 685                         UpdateVP (pos);
 686                 }
 687
 688                 public bool IsMaximized {
 689                         get { return GetWindowState () == FormWindowState.Maximized; }
 690                 }
 691
 692                 public bool IsMinimized {
 693                         get { return GetWindowState () == FormWindowState.Minimized; }
 694                 }
 695
 696                 public bool IsSizable {
 697                         get {
 698                                 switch (form.FormBorderStyle) {
 699                                 case FormBorderStyle.Sizable:
 700                                 case FormBorderStyle.SizableToolWindow:
 701                                         return (form.window_state != FormWindowState.Minimized);
 702                                 default:
 703                                         return false;
 704                                 }
 705                         }
 706                 }
 707
 708                 public bool HasBorders {
 709                         get {
 710                                 return form.FormBorderStyle != FormBorderStyle.None;
 711                         }
 712                 }
 713
 714                 public bool IsToolWindow {
 715                         get {
 716                                 if (form.FormBorderStyle == FormBorderStyle.SizableToolWindow ||
 717                                     form.FormBorderStyle == FormBorderStyle.FixedToolWindow ||
 718                                     form.GetCreateParams().IsSet (WindowExStyles.WS_EX_TOOLWINDOW))
 719                                         return true;
 720                                 return false;
 721                         }
 722                 }
 723
 724                 public int TitleBarHeight {
 725                         get {
 726                                 return ThemeEngine.Current.ManagedWindowTitleBarHeight (this);
 727                         }
 728                 }
 729
 730                 public int BorderWidth {
 731                         get {
 732                                 return ThemeEngine.Current.ManagedWindowBorderWidth (this);
 733                         }
 734                 }
 735
 736                 public virtual int MenuHeight {
 737                         get {
 738                                 return (form.Menu != null ? ThemeEngine.Current.MenuHeight : 0);
 739                         }
 740                 }
 741
 742                 protected void UpdateVP (Rectangle r)
 743                 {
 744                         UpdateVP (r.X, r.Y, r.Width, r.Height);
 745                 }
 746
 747                 protected void UpdateVP (Point loc, int w, int h)
 748                 {
 749                         UpdateVP (loc.X, loc.Y, w, h);
 750                 }
 751
 752                 protected void UpdateVP (int x, int y, int w, int h)
 753                 {
 754                         virtual_position.X = x;
 755                         virtual_position.Y = y;
 756                         virtual_position.Width = w;
 757                         virtual_position.Height = h;
 758
 759                         DrawVirtualPosition (virtual_position);
 760                 }
 761
 762                 protected virtual void HandleLButtonUp (ref Message m)
 763                 {
 764                         if (state == State.Idle)
 765                                 return;
 766
 767                         ClearVirtualPosition ();
 768
 769                         form.Capture = false;
 770                         if (state == State.Moving && form.Location != virtual_position.Location)
 771                                 form.Location = virtual_position.Location;
 772                         else if (state == State.Sizing && form.Bounds != virtual_position)
 773                                 form.Bounds = virtual_position;
 774                         state = State.Idle;
 775
 776                         OnWindowFinishedMoving ();
 777                 }
 778
 779                 private bool HandleNCLButtonUp (ref Message m)
 780                 {
 781                         if (form.Capture) {
 782                                 ClearVirtualPosition ();
 783
 784                                 form.Capture = false;
 785                                 state = State.Idle;
 786                                 if (form.MdiContainer != null)
 787                                         form.MdiContainer.SizeScrollBars();
 788                         }
 789
 790                         int x = Control.LowOrder ((int) m.LParam.ToInt32 ());
 791                         int y = Control.HighOrder ((int) m.LParam.ToInt32 ());
 792
 793                         NCPointToClient (ref x, ref y);
 794                         FormPos pos = FormPosForCoords (x, y);
 795
 796                         if (pos == FormPos.TitleBar) {
 797                                 HandleTitleBarUp (x, y);
 798                                 return true;
 799                         }
 800
 801                         return true;
 802                 }
 803
 804                 protected void DrawTitleButton (Graphics dc, TitleButton button, Rectangle clip)
 805                 {
 806                         if (!button.Rectangle.IntersectsWith (clip))
 807                                 return;
 808
 809                         dc.FillRectangle (SystemBrushes.Control, button.Rectangle);
 810                         ControlPaint.DrawCaptionButton (dc, button.Rectangle,
 811                                         button.Caption, button.State);
 812                 }
 813
 814                 public virtual void DrawMaximizedButtons (object sender, PaintEventArgs pe)
 815                 {
 816                 }
 817
 818                 protected Point MouseMove (Message m)
 819                 {
 820                         Point cp = Cursor.Position;
 821                         return new Point (cp.X - start.X, cp.Y - start.Y);
 822                 }
 823
 824                 protected virtual void DrawVirtualPosition (Rectangle virtual_position)
 825                 {
 826                         form.Bounds = virtual_position;
 827                         start = Cursor.Position;
 828                 }
 829
 830                 protected virtual void ClearVirtualPosition ()
 831                 {
 832
 833                 }
 834
 835                 protected virtual void OnWindowFinishedMoving ()
 836                 {
 837                 }
 838
 839                 protected virtual void NCPointToClient(ref int x, ref int y) {
 840                         form.PointToClient(ref x, ref y);
 841                         NCClientToNC (ref x, ref y);
 842                 }
 843
 844                 protected virtual void NCClientToNC (ref int x, ref int y) {
 845                         y += TitleBarHeight;
 846                         y += BorderWidth;
 847                         y += MenuHeight;
 848                 }
 849
 850                 internal Point GetMenuOrigin ()
 851                 {
 852                         return new Point (BorderWidth, BorderWidth + TitleBarHeight);
 853                 }
 854
 855                 protected FormPos FormPosForCoords (int x, int y)
 856                 {
 857                         int bw = BorderWidth;
 858                         if (y < TitleBarHeight + bw) {
 859                                 //      Console.WriteLine ("A");
 860                                 if (y > bw && x > bw &&
 861                                                 x < form.Width - bw)
 862                                         return FormPos.TitleBar;
 863
 864                                 if (x < bw || (x < 20 && y < bw))
 865                                         return FormPos.TopLeft;
 866
 867                                 if (x > form.Width - bw ||
 868                                         (x > form.Width - 20 && y < bw))
 869                                         return FormPos.TopRight;
 870
 871                                 if (y < bw)
 872                                         return FormPos.Top;
 873
 874                         } else if (y > form.Height - 20) {
 875                                 //      Console.WriteLine ("B");
 876                                 if (x < bw ||
 877                                                 (x < 20 && y > form.Height - bw))
 878                                         return FormPos.BottomLeft;
 879
 880                                 if (x > form.Width - (bw * 2) ||
 881                                                 (x > form.Width - 20 &&
 882                                                  y > form.Height - bw))
 883                                         return FormPos.BottomRight;
 884
 885                                 if (y > form.Height - (bw * 2))
 886                                         return FormPos.Bottom;
 887
 888
 889                         } else if (x < bw) {
 890                                 //      Console.WriteLine ("C");
 891                                 return FormPos.Left;
 892                         } else if (x > form.Width - (bw * 2)) {
 893 //                              Console.WriteLine ("D");
 894                                 return FormPos.Right;
 895                         } else {
 896                                 //                      Console.WriteLine ("E   {0}", form.Width - bw);
 897                         }
 898
 899                         return FormPos.None;
 900                 }
 901         }
 902         internal class TitleButton
 903         {
 904                 public Rectangle Rectangle;
 905                 public ButtonState State;
 906                 public CaptionButton Caption;
 907                 private EventHandler Clicked;
 908                 public bool Visible;
 909
 910                 public TitleButton (CaptionButton caption, EventHandler clicked)
 911                 {
 912                         Caption = caption;
 913                         Clicked = clicked;
 914                 }
 915
 916                 public void OnClick ()
 917                 {
 918                         if (Clicked != null) {
 919                                 Clicked (this, EventArgs.Empty);
 920                         }
 921                 }
 922         }
 923
 924         internal class TitleButtons : System.Collections.IEnumerable
 925         {
 926                 public TitleButton MinimizeButton;
 927                 public TitleButton MaximizeButton;
 928                 public TitleButton RestoreButton;
 929                 public TitleButton CloseButton;
 930                 public TitleButton HelpButton;
 931
 932                 public TitleButton [] AllButtons;
 933                 public bool Visible;
 934
 935                 private ToolTip.ToolTipWindow tooltip;
 936                 private Timer tooltip_timer;
 937                 private TitleButton tooltip_hovered_button;
 938                 private TitleButton tooltip_hidden_button;
 939                 private const int tooltip_hide_interval = 3000;
 940                 private const int tooltip_show_interval = 1000;
 941                 private Form form;
 942
 943                 public TitleButtons (Form frm)
 944                 {
 945                         this.form = frm;
 946                         this.Visible = true;
 947
 948                         MinimizeButton = new TitleButton (CaptionButton.Minimize, new EventHandler (ClickHandler));
 949                         MaximizeButton = new TitleButton (CaptionButton.Maximize, new EventHandler (ClickHandler));
 950                         RestoreButton = new TitleButton (CaptionButton.Restore, new EventHandler (ClickHandler));
 951                         CloseButton = new TitleButton (CaptionButton.Close, new EventHandler (ClickHandler));
 952                         HelpButton = new TitleButton (CaptionButton.Help, new EventHandler (ClickHandler));
 953
 954                         AllButtons = new TitleButton [] { MinimizeButton, MaximizeButton, RestoreButton, CloseButton, HelpButton };
 955                 }
 956
 957                 private void ClickHandler (object sender, EventArgs e)
 958                 {
 959                         if (!Visible) {
 960                                 return;
 961                         }
 962
 963                         TitleButton button = (TitleButton) sender;
 964
 965                         switch (button.Caption) {
 966                                 case CaptionButton.Close:
 967                                         form.Close ();
 968                                         break;
 969                                 case CaptionButton.Help:
 970                                         Console.WriteLine ("Help not implemented.");
 971                                         break;
 972                                 case CaptionButton.Maximize:
 973                                         form.WindowState = FormWindowState.Maximized;
 974                                         break;
 975                                 case CaptionButton.Minimize:
 976                                         form.WindowState = FormWindowState.Minimized;
 977                                         break;
 978                                 case CaptionButton.Restore:
 979                                         form.WindowState = FormWindowState.Normal;
 980                                         break;
 981                         }
 982                 }
 983
 984                 public TitleButton FindButton (int x, int y)
 985                 {
 986                         if (!Visible) {
 987                                 return null;
 988                         }
 989
 990                         foreach (TitleButton button in AllButtons) {
 991                                 if (button.Visible && button.Rectangle.Contains (x, y)) {
 992                                         return button;
 993                                 }
 994                         }
 995                         return null;
 996                 }
 997
 998                 public bool AnyPushedTitleButtons {
 999                         get {
1000                                 if (!Visible) {
1001                                         return false;
1002                                 }
1003
1004                                 foreach (TitleButton button in AllButtons) {
1005                                         if (button.Visible && button.State == ButtonState.Pushed) {
1006                                                 return true;
1007                                         }
1008                                 }
1009                                 return false;
1010                         }
1011                 }
1012
1013                 #region IEnumerable Members
1014
1015                 public System.Collections.IEnumerator GetEnumerator ()
1016                 {
1017                         return AllButtons.GetEnumerator ();
1018                 }
1019                 #endregion
1020
1021                 #region ToolTip helpers
1022                 // Called from MouseMove if mouse is over a button
1023                 public void ToolTipStart (TitleButton button)
1024                 {
1025                         tooltip_hovered_button = button;
1026
1027                         if (tooltip_hovered_button == tooltip_hidden_button)
1028                                 return;
1029                         tooltip_hidden_button = null;
1030
1031                         if (tooltip != null && tooltip.Visible)
1032                                 ToolTipShow (true);
1033
1034                         if (tooltip_timer == null) {
1035
1036                                 tooltip_timer = new Timer ();
1037                                 tooltip_timer.Tick += new EventHandler (ToolTipTimerTick);
1038                         }
1039
1040                         tooltip_timer.Interval = tooltip_show_interval;
1041                         tooltip_timer.Start ();
1042                         tooltip_hovered_button = button;
1043                 }
1044
1045                 public void ToolTipTimerTick (object sender, EventArgs e)
1046                 {
1047                         if (tooltip_timer.Interval == tooltip_hide_interval) {
1048                                 tooltip_hidden_button = tooltip_hovered_button;
1049                                 ToolTipHide (false);
1050                         } else {
1051                                 ToolTipShow (false);
1052                         }
1053                 }
1054                 // Called from timer (with only_refresh = false)
1055                 // Called from ToolTipStart if tooltip is already shown (with only_refresh = true)
1056                 public void ToolTipShow (bool only_refresh)
1057                 {
1058                         if (!form.Visible)
1059                                 return;
1060
1061                         string text = Locale.GetText (tooltip_hovered_button.Caption.ToString ());
1062
1063                         tooltip_timer.Interval = tooltip_hide_interval;
1064                         tooltip_timer.Enabled = true;
1065
1066                         if (only_refresh && (tooltip == null || !tooltip.Visible)) {
1067                                 return;
1068                         }
1069
1070                         if (tooltip == null)
1071                                 tooltip = new ToolTip.ToolTipWindow ();
1072                         else if (tooltip.Text == text && tooltip.Visible)
1073                                 return;
1074                         else if (tooltip.Visible)
1075                                 tooltip.Visible = false;
1076
1077                         if (form.WindowState == FormWindowState.Maximized && form.MdiParent != null)
1078                                 tooltip.Present (form.MdiParent, text);
1079                         else
1080                                 tooltip.Present (form, text);
1081
1082                 }
1083
1084                 // Called from MouseLeave (with reset_hidden_button = true)
1085                 // Called from MouseDown  (with reset_hidden_button = false)
1086                 // Called from MouseMove if mouse isn't over any button (with reset_hidden_button = false)
1087                 // Called from Timer if hiding (with reset_hidden_button = false)
1088                 public void ToolTipHide (bool reset_hidden_button)
1089                 {
1090                         if (tooltip_timer != null)
1091                                 tooltip_timer.Enabled = false;
1092                         if (tooltip != null && tooltip.Visible)
1093                                 tooltip.Visible = false;
1094                         if (reset_hidden_button)
1095                                 tooltip_hidden_button = null;
1096                 }
1097                 #endregion
1098
1099                 public bool MouseMove (int x, int y)
1100                 {
1101                         if (!Visible) {
1102                                 return false;
1103                         }
1104
1105                         bool any_change = false;
1106                         bool any_pushed_buttons = AnyPushedTitleButtons;
1107                         bool any_tooltip = false;
1108                         TitleButton over_button = FindButton (x, y);
1109
1110                         foreach (TitleButton button in this) {
1111                                 if (button == null)
1112                                         continue;
1113
1114                                 if (button == over_button) {
1115                                         if (any_pushed_buttons) {
1116                                                 any_change |= button.State != ButtonState.Pushed;
1117                                                 button.State = ButtonState.Pushed;
1118                                         }
1119                                         ToolTipStart (button);
1120                                         any_tooltip = true;
1121                                 } else {
1122                                         if (any_pushed_buttons) {
1123                                                 any_change |= button.State != ButtonState.Normal;
1124                                                 button.State = ButtonState.Normal;
1125                                         }
1126                                 }
1127                         }
1128
1129                         if (!any_tooltip)
1130                                 ToolTipHide (false);
1131
1132                         return any_change;
1133                 }
1134
1135                 public void MouseDown (int x, int y)
1136                 {
1137                         if (!Visible) {
1138                                 return;
1139                         }
1140
1141                         ToolTipHide (false);
1142
1143                         foreach (TitleButton button in this) {
1144                                 if (button != null) {
1145                                         button.State = ButtonState.Normal;
1146                                 }
1147                         }
1148                         TitleButton clicked_button = FindButton (x, y);
1149                         if (clicked_button != null) {
1150                                 clicked_button.State = ButtonState.Pushed;
1151                         }
1152                 }
1153
1154                 public void MouseUp (int x, int y)
1155                 {
1156                         if (!Visible) {
1157                                 return;
1158                         }
1159
1160                         TitleButton clicked_button = FindButton (x, y);
1161                         if (clicked_button != null) {
1162                                 clicked_button.OnClick ();
1163                         }
1164
1165                         foreach (TitleButton button in this) {
1166                                 if (button == null)
1167                                         continue;
1168
1169                                 button.State = ButtonState.Normal;
1170                         }
1171
1172                         if (clicked_button == CloseButton && !form.closing)
1173                                 XplatUI.InvalidateNC (form.Handle);
1174                 }
1175
1176                 internal void MouseLeave (int x, int y)
1177                 {
1178                         if (!Visible) {
1179                                 return;
1180                         }
1181
1182                         foreach (TitleButton button in this) {
1183                                 if (button == null)
1184                                         continue;
1185
1186                                 button.State = ButtonState.Normal;
1187                         }
1188
1189                         ToolTipHide (true);
1190                 }
1191         }
1192 }
1193
1194