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