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