contrib/src/gizmos/splittree.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        splittree.cpp
   3 // Purpose:     Classes to achieve a remotely-scrolled tree in a splitter
   4 //              window that can be scrolled by a scrolled window higher in the
   5 //              hierarchy
   6 // Author:      Julian Smart
   7 // Modified by:
   8 // Created:     8/7/2000
   9 // RCS-ID:      $Id$
  10 // Copyright:   (c) Julian Smart
  11 // Licence:     wxWindows licence
  12 /////////////////////////////////////////////////////////////////////////////
  13
  14 // ============================================================================
  15 // declarations
  16 // ============================================================================
  17
  18 // ----------------------------------------------------------------------------
  19 // headers
  20 // ----------------------------------------------------------------------------
  21 #ifdef __GNUG__
  22     #pragma interface "splittree.cpp"
  23 #endif
  24
  25 // For compilers that support precompilation, includes "wx/wx.h".
  26 #include "wx/wxprec.h"
  27
  28 #ifdef __BORLANDC__
  29     #pragma hdrstop
  30 #endif
  31
  32 // for all others, include the necessary headers (this file is usually all you
  33 // need because it includes almost all "standard" wxWindows headers)
  34 #ifndef WX_PRECOMP
  35     #include "wx/wx.h"
  36 #endif
  37
  38 #include "wx/generic/treectlg.h"
  39
  40 #include "wx/gizmos/splittree.h"
  41
  42 /*
  43  * wxRemotelyScrolledTreeCtrl
  44  */
  45
  46 #if USE_GENERIC_TREECTRL
  47 IMPLEMENT_CLASS(wxRemotelyScrolledTreeCtrl, wxGenericTreeCtrl)
  48 #else
  49 IMPLEMENT_CLASS(wxRemotelyScrolledTreeCtrl, wxTreeCtrl)
  50 #endif
  51
  52 #if USE_GENERIC_TREECTRL
  53 BEGIN_EVENT_TABLE(wxRemotelyScrolledTreeCtrl, wxGenericTreeCtrl)
  54 #else
  55 BEGIN_EVENT_TABLE(wxRemotelyScrolledTreeCtrl, wxTreeCtrl)
  56 #endif
  57         EVT_SIZE(wxRemotelyScrolledTreeCtrl::OnSize)
  58         EVT_PAINT(wxRemotelyScrolledTreeCtrl::OnPaint)
  59         EVT_TREE_ITEM_EXPANDED(-1, wxRemotelyScrolledTreeCtrl::OnExpand)
  60         EVT_TREE_ITEM_COLLAPSED(-1, wxRemotelyScrolledTreeCtrl::OnExpand)
  61         EVT_SCROLLWIN(wxRemotelyScrolledTreeCtrl::OnScroll)
  62 END_EVENT_TABLE()
  63
  64 wxRemotelyScrolledTreeCtrl::wxRemotelyScrolledTreeCtrl(wxWindow* parent, wxWindowID id, const wxPoint& pt,
  65         const wxSize& sz, long style):
  66         wxTreeCtrl(parent, id, pt, sz, style)
  67 {
  68 }
  69
  70 wxRemotelyScrolledTreeCtrl::~wxRemotelyScrolledTreeCtrl()
  71 {
  72 }
  73
  74 void wxRemotelyScrolledTreeCtrl::HideVScrollbar()
  75 {
  76 #ifdef __WXMSW__
  77     if (!IsKindOf(CLASSINFO(wxGenericTreeCtrl)))
  78     {
  79         ::ShowScrollBar((HWND) GetHWND(), SB_VERT, FALSE);
  80     }
  81     else
  82 #endif
  83     {
  84         // Implicit in overriding SetScrollbars
  85     }
  86 }
  87
  88 // Number of pixels per user unit (0 or -1 for no scrollbar)
  89 // Length of virtual canvas in user units
  90 // Length of page in user units
  91 void wxRemotelyScrolledTreeCtrl::SetScrollbars(int pixelsPerUnitX, int pixelsPerUnitY,
  92                              int noUnitsX, int noUnitsY,
  93                              int xPos, int yPos,
  94                              bool noRefresh)
  95 {
  96     if (IsKindOf(CLASSINFO(wxGenericTreeCtrl)))
  97     {
  98         wxGenericTreeCtrl* win = (wxGenericTreeCtrl*) this;
  99         win->wxGenericTreeCtrl::SetScrollbars(pixelsPerUnitX, 0, noUnitsX, 0, xPos, 0, noRefresh);
 100
 101             wxScrolledWindow* scrolledWindow = GetScrolledWindow();
 102             if (scrolledWindow)
 103             {
 104             scrolledWindow->SetScrollbars(0, pixelsPerUnitY, 0, noUnitsY, 0, yPos, noRefresh);
 105         }
 106     }
 107 }
 108
 109 // In case we're using the generic tree control.
 110 // Get the view start
 111 void wxRemotelyScrolledTreeCtrl::GetViewStart(int *x, int *y) const
 112 {
 113     if (IsKindOf(CLASSINFO(wxGenericTreeCtrl)))
 114     {
 115             wxScrolledWindow* scrolledWindow = GetScrolledWindow();
 116
 117         wxGenericTreeCtrl* win = (wxGenericTreeCtrl*) this;
 118         int x1, y1, x2, y2;
 119         win->wxGenericTreeCtrl::GetViewStart(& x1, & y1);
 120         * x = x1; * y = y1;
 121         if (!scrolledWindow)
 122             return;
 123
 124         scrolledWindow->GetViewStart(& x2, & y2);
 125         * y = y2;
 126     }
 127 }
 128
 129 // In case we're using the generic tree control.
 130 void wxRemotelyScrolledTreeCtrl::PrepareDC(wxDC& dc)
 131 {
 132     if (IsKindOf(CLASSINFO(wxGenericTreeCtrl)))
 133     {
 134             wxScrolledWindow* scrolledWindow = GetScrolledWindow();
 135
 136         wxGenericTreeCtrl* win = (wxGenericTreeCtrl*) this;
 137
 138         int startX, startY;
 139         GetViewStart(& startX, & startY);
 140
 141         int xppu1, yppu1, xppu2, yppu2;
 142         win->wxGenericTreeCtrl::GetScrollPixelsPerUnit(& xppu1, & yppu1);
 143         scrolledWindow->GetScrollPixelsPerUnit(& xppu2, & yppu2);
 144
 145         dc.SetDeviceOrigin( -startX * xppu1, -startY * yppu2 );
 146         dc.SetUserScale( m_scaleX, m_scaleY );
 147     }
 148 }
 149
 150 // Scroll to the given line (in scroll units where each unit is
 151 // the height of an item)
 152 void wxRemotelyScrolledTreeCtrl::ScrollToLine(int posHoriz, int posVert)
 153 {
 154 #ifdef __WXMSW__
 155     if (!IsKindOf(CLASSINFO(wxGenericTreeCtrl)))
 156     {
 157             UINT sbCode = SB_THUMBPOSITION;
 158             HWND vertScrollBar = 0;
 159             MSWDefWindowProc((WXUINT) WM_VSCROLL, MAKELONG(sbCode, posVert), (WXHWND) vertScrollBar);
 160     }
 161     else
 162 #endif
 163     {
 164         wxGenericTreeCtrl* win = (wxGenericTreeCtrl*) this;
 165                 win->Refresh();
 166                 /* Doesn't work yet because scrolling is ignored by Scroll
 167         int xppu, yppu;
 168             wxScrolledWindow* scrolledWindow = GetScrolledWindow();
 169             if (scrolledWindow)
 170             {
 171                         scrolledWindow->GetScrollPixelsPerUnit(& xppu, & yppu);
 172                         win->Scroll(-1, posVert*yppu);
 173                 }
 174                 */
 175     }
 176 }
 177
 178 void wxRemotelyScrolledTreeCtrl::OnSize(wxSizeEvent& event)
 179 {
 180         HideVScrollbar();
 181         AdjustRemoteScrollbars();
 182         event.Skip();
 183 }
 184
 185 void wxRemotelyScrolledTreeCtrl::OnExpand(wxTreeEvent& event)
 186 {
 187         AdjustRemoteScrollbars();
 188         event.Skip();
 189
 190     // If we don't have this, we get some bits of lines still remaining
 191     if (event.GetEventType() == wxEVT_COMMAND_TREE_ITEM_COLLAPSED)
 192         Refresh();
 193 }
 194
 195 // Adjust the containing wxScrolledWindow's scrollbars appropriately
 196 void wxRemotelyScrolledTreeCtrl::AdjustRemoteScrollbars()
 197 {
 198     // WILL THIS BE DONE AUTOMATICALLY BY THE GENERIC TREE CONTROL?
 199 /*
 200
 201 Problem with remote-scrolling the generic tree control. It relies
 202 on PrepareDC for adjusting the device origin, which in turn takes
 203 values from wxScrolledWindow: which we've turned off in order to use
 204 a different scrollbar :-( So we could override PrepareDC and use
 205 the _other_ scrolled window's position instead.
 206 Note also ViewStart would need to be overridden.
 207 Plus, wxGenericTreeCtrl::OnPaint will reset the device origin.
 208
 209 */
 210
 211     // Assumption: wxGenericTreeCtrl will adjust the scrollbars automatically,
 212     // since it'll call SetScrollbars and we've defined this to Do The Right Thing.
 213     if (!IsKindOf(CLASSINFO(wxGenericTreeCtrl)))
 214         return;
 215
 216         wxScrolledWindow* scrolledWindow = GetScrolledWindow();
 217         if (scrolledWindow)
 218         {
 219                 wxRect itemRect;
 220                 if (GetBoundingRect(GetRootItem(), itemRect))
 221                 {
 222                         int itemHeight = itemRect.GetHeight();
 223
 224                         int w, h;
 225                         GetClientSize(&w, &h);
 226
 227                         wxRect rect(0, 0, 0, 0);
 228                         CalcTreeSize(rect);
 229                         int treeViewHeight = rect.GetHeight()/itemHeight;
 230
 231                         int scrollPixelsPerLine = itemHeight;
 232                         int scrollPos = - (itemRect.y / itemHeight);
 233
 234                         scrolledWindow->SetScrollbars(0, scrollPixelsPerLine, 0, treeViewHeight, 0, scrollPos);
 235
 236                         // Ensure that when a scrollbar becomes hidden or visible,
 237                         // the contained window sizes are right.
 238                         // Problem: this is called too early (?)
 239                         wxSizeEvent event(scrolledWindow->GetSize(), scrolledWindow->GetId());
 240                         scrolledWindow->GetEventHandler()->ProcessEvent(event);
 241                 }
 242         }
 243 }
 244
 245
 246 // Calculate the area that contains both rectangles
 247 static wxRect CombineRectangles(const wxRect& rect1, const wxRect& rect2)
 248 {
 249     wxRect rect;
 250
 251     int right1 = rect1.GetRight();
 252     int bottom1 = rect1.GetBottom();
 253     int right2 = rect2.GetRight();
 254     int bottom2 = rect2.GetBottom();
 255
 256     wxPoint topLeft = wxPoint(wxMin(rect1.x, rect2.x), wxMin(rect1.y, rect2.y));
 257     wxPoint bottomRight = wxPoint(wxMax(right1, right2), wxMax(bottom1, bottom2));
 258
 259     rect.x = topLeft.x; rect.y = topLeft.y;
 260     rect.SetRight(bottomRight.x);
 261     rect.SetBottom(bottomRight.y);
 262
 263     return rect;
 264 }
 265
 266
 267 // Calculate the tree overall size so we can set the scrollbar
 268 // correctly
 269 void wxRemotelyScrolledTreeCtrl::CalcTreeSize(wxRect& rect)
 270 {
 271         CalcTreeSize(GetRootItem(), rect);
 272 }
 273
 274 void wxRemotelyScrolledTreeCtrl::CalcTreeSize(wxTreeItemId& id, wxRect& rect)
 275 {
 276         // TODO: implement GetFirst/NextVisibleItem
 277         // for wxGenericTreeCtrl, plus GetBoundingRect.
 278
 279         // More efficient implementation would be to find the last item (but how?)
 280         // Q: is the bounding rect relative to the top of the virtual tree workspace
 281         // or the top of the window? How would we convert?
 282         wxRect itemSize;
 283         if (GetBoundingRect(id, itemSize))
 284         {
 285                 rect = CombineRectangles(rect, itemSize);
 286         }
 287
 288         long cookie;
 289         wxTreeItemId childId = GetFirstChild(id, cookie);
 290         while (childId != 0)
 291         {
 292                 CalcTreeSize(childId, rect);
 293                 childId = GetNextChild(childId, cookie);
 294         }
 295 }
 296
 297 // Find the scrolled window that contains this control
 298 wxScrolledWindow* wxRemotelyScrolledTreeCtrl::GetScrolledWindow() const
 299 {
 300         wxWindow* parent = wxWindow::GetParent();
 301         while (parent)
 302         {
 303                 if (parent->IsKindOf(CLASSINFO(wxScrolledWindow)))
 304                         return (wxScrolledWindow*) parent;
 305                 parent = parent->GetParent();
 306         }
 307         return NULL;
 308 }
 309
 310 void wxRemotelyScrolledTreeCtrl::OnPaint(wxPaintEvent& event)
 311 {
 312         wxPaintDC dc(this);
 313
 314         wxTreeCtrl::OnPaint(event);
 315
 316     // Reset the device origin since it may have been set
 317     dc.SetDeviceOrigin(0, 0);
 318
 319         wxSize sz = GetClientSize();
 320
 321         wxPen pen(wxSystemSettings::GetSystemColour(wxSYS_COLOUR_3DLIGHT), 1, wxSOLID);
 322         dc.SetPen(pen);
 323         dc.SetBrush(* wxTRANSPARENT_BRUSH);
 324
 325         wxRect itemRect;
 326         if (GetBoundingRect(GetRootItem(), itemRect))
 327         {
 328                 int itemHeight = itemRect.GetHeight();
 329                 wxRect rcClient = GetRect();
 330                 int cy=0;
 331                 wxTreeItemId h;
 332                 for(h=GetFirstVisibleItem();h;h=GetNextVisible(h))
 333                 {
 334                         dc.DrawLine(rcClient.x, cy, rcClient.x + rcClient.width, cy);
 335                         cy += itemHeight;
 336                 }
 337                 dc.DrawLine(rcClient.x, cy, rcClient.x + rcClient.width, cy);
 338         }
 339 }
 340
 341 void wxRemotelyScrolledTreeCtrl::OnScroll(wxScrollWinEvent& event)
 342 {
 343     int orient = event.GetOrientation();
 344     if (orient == wxHORIZONTAL)
 345     {
 346         // Don't 'skip' or we'd get into infinite recursion
 347         return;
 348     }
 349     wxScrolledWindow* scrollWin = GetScrolledWindow();
 350     if (!scrollWin)
 351         return;
 352
 353     int x, y;
 354     scrollWin->GetViewStart(& x, & y);
 355
 356     ScrollToLine(-1, y);
 357 }
 358
 359 /*
 360  * wxThinSplitterWindow
 361  */
 362
 363 IMPLEMENT_CLASS(wxThinSplitterWindow, wxSplitterWindow)
 364
 365 BEGIN_EVENT_TABLE(wxThinSplitterWindow, wxSplitterWindow)
 366         EVT_SIZE(wxThinSplitterWindow::OnSize)
 367 END_EVENT_TABLE()
 368
 369 wxThinSplitterWindow::wxThinSplitterWindow(wxWindow* parent, wxWindowID id,
 370       const wxPoint& pos,
 371       const wxSize& sz,
 372       long style):
 373       wxSplitterWindow(parent, id, pos, sz, style)
 374 {
 375 }
 376
 377 void wxThinSplitterWindow::SizeWindows()
 378 {
 379         // The client size may have changed inbetween
 380         // the sizing of the first window and the sizing of
 381         // the second. So repeat SizeWindows.
 382     wxSplitterWindow::SizeWindows();
 383     wxSplitterWindow::SizeWindows();
 384 }
 385
 386 // Tests for x, y over sash
 387 bool wxThinSplitterWindow::SashHitTest(int x, int y, int tolerance)
 388 {
 389         return wxSplitterWindow::SashHitTest(x, y, 4);
 390 }
 391
 392 void wxThinSplitterWindow::DrawSash(wxDC& dc)
 393 {
 394     if ( m_sashPosition == 0 || !m_windowTwo)
 395         return;
 396     if (GetWindowStyle() & wxSP_NOSASH)
 397         return;
 398
 399     int w, h;
 400     GetClientSize(&w, &h);
 401
 402         if ( m_splitMode == wxSPLIT_VERTICAL )
 403         {
 404                 dc.SetPen(* m_facePen);
 405                 dc.SetBrush(* m_faceBrush);
 406                 int h1 = h-1;
 407                 int y1 = 0;
 408                 if ( (GetWindowStyleFlag() & wxSP_BORDER) != wxSP_BORDER && (GetWindowStyleFlag() & wxSP_3DBORDER) != wxSP_3DBORDER )
 409                         h1 += 1; // Not sure why this is necessary...
 410                 if ( (GetWindowStyleFlag() & wxSP_3DBORDER) == wxSP_3DBORDER)
 411                 {
 412                         y1 = 2; h1 -= 3;
 413                 }
 414                 dc.DrawRectangle(m_sashPosition, y1, m_sashSize, h1);
 415         }
 416         else
 417         {
 418                 dc.SetPen(* m_facePen);
 419                 dc.SetBrush(* m_faceBrush);
 420                 int w1 = w-1;
 421                 int x1 = 0;
 422                 if ( (GetWindowStyleFlag() & wxSP_BORDER) != wxSP_BORDER && (GetWindowStyleFlag() & wxSP_3DBORDER) != wxSP_3DBORDER )
 423                         w1 ++;
 424                 if ( (GetWindowStyleFlag() & wxSP_3DBORDER) == wxSP_3DBORDER)
 425                 {
 426                         x1 = 2; w1 -= 3;
 427                 }
 428                 dc.DrawRectangle(x1, m_sashPosition, w1, m_sashSize);
 429         }
 430
 431     dc.SetPen(wxNullPen);
 432     dc.SetBrush(wxNullBrush);
 433 }
 434
 435 void wxThinSplitterWindow::OnSize(wxSizeEvent& event)
 436 {
 437         wxSplitterWindow::OnSize(event);
 438 }
 439
 440 /*
 441  * wxSplitterScrolledWindow
 442  */
 443
 444 IMPLEMENT_CLASS(wxSplitterScrolledWindow, wxScrolledWindow)
 445
 446 BEGIN_EVENT_TABLE(wxSplitterScrolledWindow, wxScrolledWindow)
 447         EVT_SCROLLWIN(wxSplitterScrolledWindow::OnScroll)
 448         EVT_SIZE(wxSplitterScrolledWindow::OnSize)
 449 END_EVENT_TABLE()
 450
 451 wxSplitterScrolledWindow::wxSplitterScrolledWindow(wxWindow* parent, wxWindowID id,
 452       const wxPoint& pos,
 453       const wxSize& sz,
 454       long style):
 455       wxScrolledWindow(parent, id, pos, sz, style)
 456 {
 457 }
 458
 459 void wxSplitterScrolledWindow::OnSize(wxSizeEvent& event)
 460 {
 461         wxSize sz = GetClientSize();
 462         if (GetChildren().First())
 463         {
 464                 ((wxWindow*) GetChildren().First()->Data())->SetSize(0, 0, sz.x, sz.y);
 465         }
 466 }
 467
 468 void wxSplitterScrolledWindow::OnScroll(wxScrollWinEvent& event)
 469 {
 470     // Ensure that events being propagated back up the window hierarchy
 471     // don't cause an infinite loop
 472     static bool inOnScroll = FALSE;
 473     if (inOnScroll)
 474         return;
 475     inOnScroll = TRUE;
 476
 477     int orient = event.GetOrientation();
 478
 479     int nScrollInc = CalcScrollInc(event);
 480     if (nScrollInc == 0)
 481     {
 482         inOnScroll = FALSE;
 483         return;
 484     }
 485
 486     if (orient == wxHORIZONTAL)
 487     {
 488         int newPos = m_xScrollPosition + nScrollInc;
 489         SetScrollPos(wxHORIZONTAL, newPos, TRUE );
 490     }
 491     else
 492     {
 493         int newPos = m_yScrollPosition + nScrollInc;
 494         SetScrollPos(wxVERTICAL, newPos, TRUE );
 495     }
 496
 497     if (orient == wxHORIZONTAL)
 498     {
 499         m_xScrollPosition += nScrollInc;
 500     }
 501     else
 502     {
 503         m_yScrollPosition += nScrollInc;
 504     }
 505
 506     // Find targets in splitter window and send the event to them
 507     wxNode* node = GetChildren().First();
 508     while (node)
 509     {
 510         wxWindow* child = (wxWindow*) node->Data();
 511         if (child->IsKindOf(CLASSINFO(wxSplitterWindow)))
 512         {
 513             wxSplitterWindow* splitter = (wxSplitterWindow*) child;
 514             if (splitter->GetWindow1())
 515                 splitter->GetWindow1()->ProcessEvent(event);
 516             if (splitter->GetWindow2())
 517                 splitter->GetWindow2()->ProcessEvent(event);
 518             break;
 519         }
 520         node = node->Next();
 521     }
 522
 523 #ifdef __WXMAC__
 524     m_targetWindow->MacUpdateImmediately() ;
 525 #endif
 526
 527     inOnScroll = FALSE;
 528 }
 529