src/msw/slidrmsw.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        slidermsw.cpp
   3 // Purpose:     wxSliderMSW
   4 // Author:      Julian Smart
   5 // Modified by:
   6 // Created:     04/01/98
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) Julian Smart and Markus Holzem
   9 // Licence:       wxWindows license
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 #ifdef __GNUG__
  13 #pragma implementation "slidrmsw.h"
  14 #endif
  15
  16 // For compilers that support precompilation, includes "wx.h".
  17 #include "wx/wxprec.h"
  18
  19 #ifdef __BORLANDC__
  20 #pragma hdrstop
  21 #endif
  22
  23 #ifndef WX_PRECOMP
  24 #include <stdio.h>
  25 #endif
  26
  27 #include "wx/utils.h"
  28 #include "wx/brush.h"
  29 #include "wx/msw/slidrmsw.h"
  30 #include "wx/msw/private.h"
  31
  32 IMPLEMENT_DYNAMIC_CLASS(wxSliderMSW, wxControl)
  33
  34 // Slider
  35 wxSliderMSW::wxSliderMSW()
  36 {
  37   m_staticValue = 0;
  38   m_staticMin = 0;
  39   m_staticMax = 0;
  40   m_pageSize = 1;
  41   m_lineSize = 1;
  42   m_rangeMax = 0;
  43   m_rangeMin = 0;
  44   m_tickFreq = 0;
  45 }
  46
  47 bool wxSliderMSW::Create(wxWindow *parent, wxWindowID id,
  48            int value, int minValue, int maxValue,
  49            const wxPoint& pos,
  50            const wxSize& size, long style,
  51            const wxValidator& validator,
  52            const wxString& name)
  53 {
  54   SetName(name);
  55   SetValidator(validator);
  56
  57   if (parent) parent->AddChild(this);
  58   SetBackgroundColour(parent->GetBackgroundColour()) ;
  59   SetForegroundColour(parent->GetForegroundColour()) ;
  60
  61   m_staticValue = 0;
  62   m_staticMin = 0;
  63   m_staticMax = 0;
  64   m_pageSize = 1;
  65   m_lineSize = 1;
  66   m_windowStyle = style;
  67   m_tickFreq = 0;
  68
  69   if ( id == -1 )
  70       m_windowId = (int)NewControlId();
  71   else
  72     m_windowId = id;
  73
  74   int x = pos.x;
  75   int y = pos.y;
  76   int width = size.x;
  77   int height = size.y;
  78
  79   // non-Win95 implementation
  80
  81   long msStyle = WS_CHILD | WS_VISIBLE | WS_BORDER | SS_CENTER;
  82
  83   bool want3D;
  84   WXDWORD exStyle = Determine3DEffects(WS_EX_CLIENTEDGE, &want3D) ;
  85
  86   m_staticValue = (WXHWND) CreateWindowEx(exStyle, wxT("STATIC"), NULL,
  87                            msStyle,
  88                            0, 0, 0, 0, (HWND) parent->GetHWND(), (HMENU)NewControlId(),
  89                            wxGetInstance(), NULL);
  90
  91   // Now create min static control
  92   wxSprintf(wxBuffer, wxT("%d"), minValue);
  93   m_staticMin = (WXHWND) CreateWindowEx(0, wxT("STATIC"), wxBuffer,
  94                          STATIC_FLAGS,
  95                          0, 0, 0, 0, (HWND) parent->GetHWND(), (HMENU)NewControlId(),
  96                          wxGetInstance(), NULL);
  97
  98   // Now create slider
  99   m_windowId = (int)NewControlId();
 100
 101   msStyle = 0;
 102   if (m_windowStyle & wxSL_VERTICAL)
 103     msStyle = SBS_VERT | WS_CHILD | WS_VISIBLE | WS_TABSTOP ;
 104   else
 105     msStyle = SBS_HORZ | WS_CHILD | WS_VISIBLE | WS_TABSTOP ;
 106
 107   HWND scroll_bar = CreateWindowEx(MakeExtendedStyle(m_windowStyle), wxT("SCROLLBAR"), wxBuffer,
 108                          msStyle,
 109                          0, 0, 0, 0, (HWND) parent->GetHWND(), (HMENU)m_windowId,
 110                          wxGetInstance(), NULL);
 111
 112   m_pageSize = (int)((maxValue-minValue)/10);
 113   m_rangeMax = maxValue;
 114   m_rangeMin = minValue;
 115
 116   ::SetScrollRange(scroll_bar, SB_CTL, minValue, maxValue, FALSE);
 117   ::SetScrollPos(scroll_bar, SB_CTL, value, FALSE);
 118   ShowWindow(scroll_bar, SW_SHOW);
 119
 120   m_hWnd = (WXHWND)scroll_bar;
 121
 122   // Subclass again for purposes of dialog editing mode
 123   SubclassWin(GetHWND());
 124
 125   // Finally, create max value static item
 126   wxSprintf(wxBuffer, wxT("%d"), maxValue);
 127   m_staticMax = (WXHWND) CreateWindowEx(0, wxT("STATIC"), wxBuffer,
 128                          STATIC_FLAGS,
 129                          0, 0, 0, 0, (HWND) parent->GetHWND(), (HMENU)NewControlId(),
 130                          wxGetInstance(), NULL);
 131
 132   SetFont(parent->GetFont());
 133
 134   if (GetFont().Ok())
 135   {
 136 //    GetFont()->RealizeResource();
 137     if (GetFont().GetResourceHandle())
 138     {
 139         if ( m_staticMin )
 140               SendMessage((HWND)m_staticMin,WM_SETFONT,
 141                       (WPARAM)GetFont().GetResourceHandle(),0L);
 142         if ( m_staticMax )
 143               SendMessage((HWND)m_staticMax,WM_SETFONT,
 144                   (WPARAM)GetFont().GetResourceHandle(),0L);
 145           if (m_staticValue)
 146             SendMessage((HWND)m_staticValue,WM_SETFONT,
 147                     (WPARAM)GetFont().GetResourceHandle(),0L);
 148     }
 149   }
 150
 151   SetSize(x, y, width, height);
 152   SetValue(value);
 153
 154   return TRUE;
 155 }
 156
 157 bool wxSliderMSW::MSWOnScroll(int WXUNUSED(orientation), WXWORD wParam,
 158                               WXWORD pos, WXHWND control)
 159 {
 160     int position = ::GetScrollPos((HWND)control, SB_CTL);
 161
 162     int nScrollInc;
 163     wxEventType scrollEvent = wxEVT_NULL;
 164     switch ( wParam )
 165     {
 166         case SB_TOP:
 167             nScrollInc = m_rangeMax - position;
 168             scrollEvent = wxEVT_SCROLL_TOP;
 169             break;
 170
 171         case SB_BOTTOM:
 172             nScrollInc = - position;
 173             scrollEvent = wxEVT_SCROLL_BOTTOM;
 174             break;
 175
 176         case SB_LINEUP:
 177             nScrollInc = - GetLineSize();
 178             scrollEvent = wxEVT_SCROLL_LINEUP;
 179             break;
 180
 181         case SB_LINEDOWN:
 182             nScrollInc = GetLineSize();
 183             scrollEvent = wxEVT_SCROLL_LINEDOWN;
 184             break;
 185
 186         case SB_PAGEUP:
 187             nScrollInc = -GetPageSize();
 188             scrollEvent = wxEVT_SCROLL_PAGEUP;
 189             break;
 190
 191         case SB_PAGEDOWN:
 192             nScrollInc = GetPageSize();
 193             scrollEvent = wxEVT_SCROLL_PAGEDOWN;
 194             break;
 195
 196         case SB_THUMBTRACK:
 197         case SB_THUMBPOSITION:
 198 #ifdef __WIN32__
 199             nScrollInc = (signed short)pos - position;
 200 #else
 201             nScrollInc = pos - position;
 202 #endif
 203             scrollEvent = wxEVT_SCROLL_THUMBTRACK;
 204             break;
 205
 206         default:
 207             nScrollInc = 0;
 208     }
 209
 210     if (nScrollInc == 0)
 211     {
 212         // no event...
 213         return FALSE;
 214     }
 215
 216     int newPos = position + nScrollInc;
 217
 218     if ( (newPos < GetMin()) || (newPos > GetMax()) )
 219     {
 220         // out of range - but we did process it
 221         return TRUE;
 222     }
 223
 224     SetValue(newPos);
 225
 226     wxScrollEvent event(scrollEvent, m_windowId);
 227     event.SetPosition(newPos);
 228     event.SetEventObject( this );
 229     GetEventHandler()->ProcessEvent(event);
 230
 231     wxCommandEvent cevent( wxEVT_COMMAND_SLIDER_UPDATED, GetId() );
 232     cevent.SetEventObject( this );
 233
 234     return GetEventHandler()->ProcessEvent( cevent );
 235 }
 236
 237 wxSliderMSW::~wxSliderMSW()
 238 {
 239     if (m_staticMin)
 240       DestroyWindow((HWND) m_staticMin);
 241     if (m_staticMax)
 242       DestroyWindow((HWND) m_staticMax);
 243     if (m_staticValue)
 244       DestroyWindow((HWND) m_staticValue);
 245 }
 246
 247 int wxSliderMSW::GetValue() const
 248 {
 249   return ::GetScrollPos(GetHwnd(), SB_CTL);
 250 }
 251
 252 void wxSliderMSW::SetValue(int value)
 253 {
 254   ::SetScrollPos(GetHwnd(), SB_CTL, value, TRUE);
 255   if (m_staticValue)
 256   {
 257     wxSprintf(wxBuffer, wxT("%d"), value);
 258     SetWindowText((HWND) m_staticValue, wxBuffer);
 259   }
 260 }
 261
 262 void wxSliderMSW::GetSize(int *width, int *height) const
 263 {
 264   RECT rect;
 265   rect.left = -1; rect.right = -1; rect.top = -1; rect.bottom = -1;
 266
 267   wxFindMaxSize(GetHWND(), &rect);
 268
 269   if (m_staticMin)
 270     wxFindMaxSize(m_staticMin, &rect);
 271   if (m_staticMax)
 272     wxFindMaxSize(m_staticMax, &rect);
 273   if (m_staticValue)
 274     wxFindMaxSize(m_staticValue, &rect);
 275
 276   *width = rect.right - rect.left;
 277   *height = rect.bottom - rect.top;
 278 }
 279
 280 void wxSliderMSW::GetPosition(int *x, int *y) const
 281 {
 282   wxWindow *parent = GetParent();
 283   RECT rect;
 284   rect.left = -1; rect.right = -1; rect.top = -1; rect.bottom = -1;
 285
 286   wxFindMaxSize(GetHWND(), &rect);
 287
 288   if (m_staticMin)
 289     wxFindMaxSize(m_staticMin, &rect);
 290   if (m_staticMax)
 291     wxFindMaxSize(m_staticMax, &rect);
 292   if (m_staticValue)
 293     wxFindMaxSize(m_staticValue, &rect);
 294
 295   // Since we now have the absolute screen coords,
 296   // if there's a parent we must subtract its top left corner
 297   POINT point;
 298   point.x = rect.left;
 299   point.y = rect.top;
 300   if (parent)
 301     ::ScreenToClient((HWND) parent->GetHWND(), &point);
 302
 303   // We may be faking the client origin.
 304   // So a window that's really at (0, 30) may appear
 305   // (to wxWin apps) to be at (0, 0).
 306   if (GetParent())
 307   {
 308     wxPoint pt(GetParent()->GetClientAreaOrigin());
 309     point.x -= pt.x;
 310     point.y -= pt.y;
 311   }
 312   *x = point.x;
 313   *y = point.y;
 314 }
 315
 316 // TODO one day, make sense of all this horros and replace it with a readable
 317 //      DoGetBestSize()
 318 void wxSliderMSW::DoSetSize(int x, int y, int width, int height, int sizeFlags)
 319 {
 320   int x1 = x;
 321   int y1 = y;
 322   int w1 = width;
 323   int h1 = height;
 324
 325   int currentX, currentY;
 326   GetPosition(&currentX, &currentY);
 327   if (x == -1 || (sizeFlags & wxSIZE_ALLOW_MINUS_ONE))
 328     x1 = currentX;
 329   if (y == -1 || (sizeFlags & wxSIZE_ALLOW_MINUS_ONE))
 330     y1 = currentY;
 331
 332   AdjustForParentClientOrigin(x1, y1, sizeFlags);
 333
 334   wxChar buf[300];
 335
 336   int x_offset = x;
 337   int y_offset = y;
 338
 339   int cx;     // slider,min,max sizes
 340   int cy;
 341   int cyf;
 342
 343   wxGetCharSize(GetHWND(), &cx, &cy,& this->GetFont());
 344
 345   if ((m_windowStyle & wxSL_VERTICAL) != wxSL_VERTICAL)
 346   {
 347     if ( m_windowStyle & wxSL_LABELS )
 348     {
 349     int min_len = 0;
 350
 351     GetWindowText((HWND) m_staticMin, buf, 300);
 352     GetTextExtent(buf, &min_len, &cyf,NULL,NULL, & this->GetFont());
 353
 354     int max_len = 0;
 355
 356     GetWindowText((HWND) m_staticMax, buf, 300);
 357     GetTextExtent(buf, &max_len, &cyf,NULL,NULL, & this->GetFont());
 358     if (m_staticValue)
 359     {
 360       int new_width = (int)(wxMax(min_len, max_len));
 361       int valueHeight = (int)cyf;
 362 #ifdef __WIN32__
 363       // For some reason, under Win95, the text edit control has
 364       // a lot of space before the first character
 365       new_width += 3*cx;
 366 #endif
 367       MoveWindow((HWND) m_staticValue, x_offset, y_offset, new_width, valueHeight, TRUE);
 368       x_offset += new_width + cx;
 369     }
 370
 371     MoveWindow((HWND) m_staticMin, x_offset, y_offset, (int)min_len, cy, TRUE);
 372     x_offset += (int)(min_len + cx);
 373
 374     int slider_length = (int)(w1 - x_offset - max_len - cx);
 375
 376     int slider_height = cy;
 377
 378     // Slider must have a minimum/default length/height
 379     if (slider_length < 100)
 380       slider_length = 100;
 381
 382     MoveWindow(GetHwnd(), x_offset, y_offset, slider_length, slider_height, TRUE);
 383     x_offset += slider_length + cx;
 384
 385     MoveWindow((HWND) m_staticMax, x_offset, y_offset, (int)max_len, cy, TRUE);
 386     }
 387     else
 388     {
 389         // No labels
 390         if ( w1 < 0 )
 391             w1 = 200;
 392         if ( h1 < 0 )
 393             h1 = 20;
 394         MoveWindow(GetHwnd(), x1, y1, w1, h1, TRUE);
 395     }
 396   }
 397   else
 398   {
 399     if ( m_windowStyle & wxSL_LABELS )
 400     {
 401     int min_len;
 402     GetWindowText((HWND) m_staticMin, buf, 300);
 403     GetTextExtent(buf, &min_len, &cyf,NULL,NULL,& this->GetFont());
 404
 405     int max_len;
 406     GetWindowText((HWND) m_staticMax, buf, 300);
 407     GetTextExtent(buf, &max_len, &cyf,NULL,NULL, & this->GetFont());
 408
 409     if (m_staticValue)
 410     {
 411       int new_width = (int)(wxMax(min_len, max_len));
 412       int valueHeight = (int)cyf;
 413 /*** Suggested change by George Tasker - remove this block...
 414 #ifdef __WIN32__
 415       // For some reason, under Win95, the text edit control has
 416       // a lot of space before the first character
 417       new_width += 3*cx;
 418 #endif
 419  ... and replace with following line: */
 420       new_width += cx;
 421
 422       MoveWindow((HWND) m_staticValue, x_offset, y_offset, new_width, valueHeight, TRUE);
 423       y_offset += valueHeight;
 424     }
 425
 426     MoveWindow((HWND) m_staticMin, x_offset, y_offset, (int)min_len, cy, TRUE);
 427     y_offset += cy;
 428
 429     int slider_length = (int)(h1 - y_offset - cy - cy);
 430
 431     // Use character height as an estimate of slider width (yes, width)
 432     int slider_width = cy;
 433
 434     // Slider must have a minimum/default length
 435     if (slider_length < 100)
 436       slider_length = 100;
 437
 438     MoveWindow(GetHwnd(), x_offset, y_offset, slider_width, slider_length, TRUE);
 439     y_offset += slider_length;
 440
 441     MoveWindow((HWND) m_staticMax, x_offset, y_offset, (int)max_len, cy, TRUE);
 442     }
 443     else
 444     {
 445         // No labels
 446         if ( w1 < 0 )
 447             w1 = 20;
 448         if ( h1 < 0 )
 449             h1 = 200;
 450         MoveWindow(GetHwnd(), x1, y1, w1, h1, TRUE);
 451     }
 452   }
 453 }
 454
 455 void wxSliderMSW::SetRange(int minValue, int maxValue)
 456 {
 457   m_rangeMin = minValue;
 458   m_rangeMax = maxValue;
 459
 460   ::SetScrollRange(GetHwnd(), SB_CTL, m_rangeMin, m_rangeMax, TRUE);
 461   wxChar buf[40];
 462   if ( m_staticMin )
 463   {
 464       wxSprintf(buf, wxT("%d"), m_rangeMin);
 465       SetWindowText((HWND) m_staticMin, buf);
 466   }
 467
 468   if ( m_staticMax )
 469   {
 470     wxSprintf(buf, wxT("%d"), m_rangeMax);
 471     SetWindowText((HWND) m_staticMax, buf);
 472   }
 473 }
 474
 475 WXHBRUSH wxSliderMSW::OnCtlColor(WXHDC pDC, WXHWND pWnd, WXUINT nCtlColor,
 476             WXUINT message, WXWPARAM wParam, WXLPARAM lParam)
 477 {
 478   if ( nCtlColor == CTLCOLOR_SCROLLBAR )
 479     return 0;
 480
 481   // Otherwise, it's a static
 482   return wxControl::OnCtlColor(pDC, pWnd, nCtlColor, message, wParam, lParam);
 483 }
 484
 485 // For trackbars only
 486 void wxSliderMSW::SetTickFreq(int n, int pos)
 487 {
 488 }
 489
 490 void wxSliderMSW::SetPageSize(int pageSize)
 491 {
 492   m_pageSize = pageSize;
 493 }
 494
 495 int wxSliderMSW::GetPageSize() const
 496 {
 497   return m_pageSize;
 498 }
 499
 500 void wxSliderMSW::ClearSel()
 501 {
 502 }
 503
 504 void wxSliderMSW::ClearTicks()
 505 {
 506 }
 507
 508 void wxSliderMSW::SetLineSize(int lineSize)
 509 {
 510   m_lineSize = lineSize;
 511 }
 512
 513 int wxSliderMSW::GetLineSize() const
 514 {
 515   return m_lineSize;
 516 }
 517
 518 int wxSliderMSW::GetSelEnd() const
 519 {
 520   return 0;
 521 }
 522
 523 int wxSliderMSW::GetSelStart() const
 524 {
 525   return 0;
 526 }
 527
 528 void wxSliderMSW::SetSelection(int minPos, int maxPos)
 529 {
 530 }
 531
 532 void wxSliderMSW::SetThumbLength(int len)
 533 {
 534 }
 535
 536 int wxSliderMSW::GetThumbLength() const
 537 {
 538   return 0;
 539 }
 540
 541 void wxSliderMSW::SetTick(int tickPos)
 542 {
 543 }
 544
 545 bool wxSliderMSW::ContainsHWND(WXHWND hWnd) const
 546 {
 547     return ( hWnd == GetStaticMin() || hWnd == GetStaticMax() || hWnd == GetEditValue() );
 548 }
 549
 550 void wxSliderMSW::Command (wxCommandEvent & event)
 551 {
 552   SetValue (event.GetInt());
 553   ProcessCommand (event);
 554 }
 555
 556 bool wxSliderMSW::Show(bool show)
 557 {
 558     wxWindow::Show(show);
 559
 560     int cshow;
 561     if (show)
 562         cshow = SW_SHOW;
 563     else
 564         cshow = SW_HIDE;
 565
 566     if(m_staticValue)
 567         ShowWindow((HWND) m_staticValue, (BOOL)cshow);
 568     if(m_staticMin)
 569         ShowWindow((HWND) m_staticMin, (BOOL)cshow);
 570     if(m_staticMax)
 571         ShowWindow((HWND) m_staticMax, (BOOL)cshow);
 572     return TRUE;
 573 }
 574
 575