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 #if !USE_SHARED_LIBRARY
  33 IMPLEMENT_DYNAMIC_CLASS(wxSliderMSW, wxControl)
  34 #endif
  35
  36 // Slider
  37 wxSliderMSW::wxSliderMSW()
  38 {
  39   m_staticValue = 0;
  40   m_staticMin = 0;
  41   m_staticMax = 0;
  42   m_pageSize = 1;
  43   m_lineSize = 1;
  44   m_rangeMax = 0;
  45   m_rangeMin = 0;
  46   m_tickFreq = 0;
  47 }
  48
  49 bool wxSliderMSW::Create(wxWindow *parent, wxWindowID id,
  50            int value, int minValue, int maxValue,
  51            const wxPoint& pos,
  52            const wxSize& size, long style,
  53            const wxValidator& validator,
  54            const wxString& name)
  55 {
  56   SetName(name);
  57   SetValidator(validator);
  58
  59   if (parent) parent->AddChild(this);
  60   SetBackgroundColour(parent->GetBackgroundColour()) ;
  61   SetForegroundColour(parent->GetForegroundColour()) ;
  62
  63   m_staticValue = 0;
  64   m_staticMin = 0;
  65   m_staticMax = 0;
  66   m_pageSize = 1;
  67   m_lineSize = 1;
  68   m_windowStyle = style;
  69   m_tickFreq = 0;
  70
  71   if ( id == -1 )
  72       m_windowId = (int)NewControlId();
  73   else
  74     m_windowId = id;
  75
  76   int x = pos.x;
  77   int y = pos.y;
  78   int width = size.x;
  79   int height = size.y;
  80
  81   // non-Win95 implementation
  82
  83   long msStyle = WS_CHILD | WS_VISIBLE | WS_BORDER | SS_CENTER;
  84
  85   bool want3D;
  86   WXDWORD exStyle = Determine3DEffects(WS_EX_CLIENTEDGE, &want3D) ;
  87
  88   m_staticValue = (WXHWND) CreateWindowEx(exStyle, _T("STATIC"), NULL,
  89                            msStyle,
  90                            0, 0, 0, 0, (HWND) parent->GetHWND(), (HMENU)NewControlId(),
  91                            wxGetInstance(), NULL);
  92
  93   // Now create min static control
  94   wxSprintf(wxBuffer, _T("%d"), minValue);
  95   m_staticMin = (WXHWND) CreateWindowEx(0, _T("STATIC"), wxBuffer,
  96                          STATIC_FLAGS,
  97                          0, 0, 0, 0, (HWND) parent->GetHWND(), (HMENU)NewControlId(),
  98                          wxGetInstance(), NULL);
  99
 100   // Now create slider
 101   m_windowId = (int)NewControlId();
 102
 103   msStyle = 0;
 104   if (m_windowStyle & wxSL_VERTICAL)
 105     msStyle = SBS_VERT | WS_CHILD | WS_VISIBLE | WS_TABSTOP ;
 106   else
 107     msStyle = SBS_HORZ | WS_CHILD | WS_VISIBLE | WS_TABSTOP ;
 108
 109   HWND scroll_bar = CreateWindowEx(MakeExtendedStyle(m_windowStyle), _T("SCROLLBAR"), wxBuffer,
 110                          msStyle,
 111                          0, 0, 0, 0, (HWND) parent->GetHWND(), (HMENU)m_windowId,
 112                          wxGetInstance(), NULL);
 113
 114   m_pageSize = (int)((maxValue-minValue)/10);
 115   m_rangeMax = maxValue;
 116   m_rangeMin = minValue;
 117
 118   ::SetScrollRange(scroll_bar, SB_CTL, minValue, maxValue, FALSE);
 119   ::SetScrollPos(scroll_bar, SB_CTL, value, FALSE);
 120   ShowWindow(scroll_bar, SW_SHOW);
 121
 122   m_hWnd = (WXHWND)scroll_bar;
 123
 124   // Subclass again for purposes of dialog editing mode
 125   SubclassWin(GetHWND());
 126
 127   // Finally, create max value static item
 128   wxSprintf(wxBuffer, _T("%d"), maxValue);
 129   m_staticMax = (WXHWND) CreateWindowEx(0, _T("STATIC"), wxBuffer,
 130                          STATIC_FLAGS,
 131                          0, 0, 0, 0, (HWND) parent->GetHWND(), (HMENU)NewControlId(),
 132                          wxGetInstance(), NULL);
 133
 134   SetFont(parent->GetFont());
 135
 136   if (GetFont().Ok())
 137   {
 138 //    GetFont()->RealizeResource();
 139     if (GetFont().GetResourceHandle())
 140     {
 141         if ( m_staticMin )
 142               SendMessage((HWND)m_staticMin,WM_SETFONT,
 143                       (WPARAM)GetFont().GetResourceHandle(),0L);
 144         if ( m_staticMax )
 145               SendMessage((HWND)m_staticMax,WM_SETFONT,
 146                   (WPARAM)GetFont().GetResourceHandle(),0L);
 147           if (m_staticValue)
 148             SendMessage((HWND)m_staticValue,WM_SETFONT,
 149                     (WPARAM)GetFont().GetResourceHandle(),0L);
 150     }
 151   }
 152
 153   SetSize(x, y, width, height);
 154   SetValue(value);
 155
 156   return TRUE;
 157 }
 158
 159 bool wxSliderMSW::MSWOnScroll(int WXUNUSED(orientation), WXWORD wParam,
 160                               WXWORD pos, WXHWND control)
 161 {
 162     int position = ::GetScrollPos((HWND)control, SB_CTL);
 163
 164     int nScrollInc;
 165     wxEventType scrollEvent = wxEVT_NULL;
 166     switch ( wParam )
 167     {
 168         case SB_TOP:
 169             nScrollInc = m_rangeMax - position;
 170             scrollEvent = wxEVT_SCROLL_TOP;
 171             break;
 172
 173         case SB_BOTTOM:
 174             nScrollInc = - position;
 175             scrollEvent = wxEVT_SCROLL_BOTTOM;
 176             break;
 177
 178         case SB_LINEUP:
 179             nScrollInc = - GetLineSize();
 180             scrollEvent = wxEVT_SCROLL_LINEUP;
 181             break;
 182
 183         case SB_LINEDOWN:
 184             nScrollInc = GetLineSize();
 185             scrollEvent = wxEVT_SCROLL_LINEDOWN;
 186             break;
 187
 188         case SB_PAGEUP:
 189             nScrollInc = -GetPageSize();
 190             scrollEvent = wxEVT_SCROLL_PAGEUP;
 191             break;
 192
 193         case SB_PAGEDOWN:
 194             nScrollInc = GetPageSize();
 195             scrollEvent = wxEVT_SCROLL_PAGEDOWN;
 196             break;
 197
 198         case SB_THUMBTRACK:
 199         case SB_THUMBPOSITION:
 200 #ifdef __WIN32__
 201             nScrollInc = (signed short)pos - position;
 202 #else
 203             nScrollInc = pos - position;
 204 #endif
 205             scrollEvent = wxEVT_SCROLL_THUMBTRACK;
 206             break;
 207
 208         default:
 209             nScrollInc = 0;
 210     }
 211
 212     if (nScrollInc == 0)
 213     {
 214         // no event...
 215         return FALSE;
 216     }
 217
 218     int newPos = position + nScrollInc;
 219
 220     if ( (newPos < GetMin()) || (newPos > GetMax()) )
 221     {
 222         // out of range - but we did process it
 223         return TRUE;
 224     }
 225
 226     SetValue(newPos);
 227
 228     wxScrollEvent event(scrollEvent, m_windowId);
 229     event.SetPosition(newPos);
 230     event.SetEventObject( this );
 231     GetEventHandler()->ProcessEvent(event);
 232
 233     wxCommandEvent cevent( wxEVT_COMMAND_SLIDER_UPDATED, GetId() );
 234     cevent.SetEventObject( this );
 235
 236     return GetEventHandler()->ProcessEvent( cevent );
 237 }
 238
 239 wxSliderMSW::~wxSliderMSW()
 240 {
 241     if (m_staticMin)
 242       DestroyWindow((HWND) m_staticMin);
 243     if (m_staticMax)
 244       DestroyWindow((HWND) m_staticMax);
 245     if (m_staticValue)
 246       DestroyWindow((HWND) m_staticValue);
 247 }
 248
 249 int wxSliderMSW::GetValue() const
 250 {
 251   return ::GetScrollPos(GetHwnd(), SB_CTL);
 252 }
 253
 254 void wxSliderMSW::SetValue(int value)
 255 {
 256   ::SetScrollPos(GetHwnd(), SB_CTL, value, TRUE);
 257   if (m_staticValue)
 258   {
 259     wxSprintf(wxBuffer, _T("%d"), value);
 260     SetWindowText((HWND) m_staticValue, wxBuffer);
 261   }
 262 }
 263
 264 void wxSliderMSW::GetSize(int *width, int *height) const
 265 {
 266   RECT rect;
 267   rect.left = -1; rect.right = -1; rect.top = -1; rect.bottom = -1;
 268
 269   wxFindMaxSize(GetHWND(), &rect);
 270
 271   if (m_staticMin)
 272     wxFindMaxSize(m_staticMin, &rect);
 273   if (m_staticMax)
 274     wxFindMaxSize(m_staticMax, &rect);
 275   if (m_staticValue)
 276     wxFindMaxSize(m_staticValue, &rect);
 277
 278   *width = rect.right - rect.left;
 279   *height = rect.bottom - rect.top;
 280 }
 281
 282 void wxSliderMSW::GetPosition(int *x, int *y) const
 283 {
 284   wxWindow *parent = GetParent();
 285   RECT rect;
 286   rect.left = -1; rect.right = -1; rect.top = -1; rect.bottom = -1;
 287
 288   wxFindMaxSize(GetHWND(), &rect);
 289
 290   if (m_staticMin)
 291     wxFindMaxSize(m_staticMin, &rect);
 292   if (m_staticMax)
 293     wxFindMaxSize(m_staticMax, &rect);
 294   if (m_staticValue)
 295     wxFindMaxSize(m_staticValue, &rect);
 296
 297   // Since we now have the absolute screen coords,
 298   // if there's a parent we must subtract its top left corner
 299   POINT point;
 300   point.x = rect.left;
 301   point.y = rect.top;
 302   if (parent)
 303     ::ScreenToClient((HWND) parent->GetHWND(), &point);
 304
 305   // We may be faking the client origin.
 306   // So a window that's really at (0, 30) may appear
 307   // (to wxWin apps) to be at (0, 0).
 308   if (GetParent())
 309   {
 310     wxPoint pt(GetParent()->GetClientAreaOrigin());
 311     point.x -= pt.x;
 312     point.y -= pt.y;
 313   }
 314   *x = point.x;
 315   *y = point.y;
 316 }
 317
 318 // TODO one day, make sense of all this horros and replace it with a readable
 319 //      DoGetBestSize()
 320 void wxSliderMSW::DoSetSize(int x, int y, int width, int height, int sizeFlags)
 321 {
 322   int x1 = x;
 323   int y1 = y;
 324   int w1 = width;
 325   int h1 = height;
 326
 327   int currentX, currentY;
 328   GetPosition(&currentX, &currentY);
 329   if (x == -1 || (sizeFlags & wxSIZE_ALLOW_MINUS_ONE))
 330     x1 = currentX;
 331   if (y == -1 || (sizeFlags & wxSIZE_ALLOW_MINUS_ONE))
 332     y1 = currentY;
 333
 334   AdjustForParentClientOrigin(x1, y1, sizeFlags);
 335
 336   wxChar buf[300];
 337
 338   int x_offset = x;
 339   int y_offset = y;
 340
 341   int cx;     // slider,min,max sizes
 342   int cy;
 343   int cyf;
 344
 345   wxGetCharSize(GetHWND(), &cx, &cy,& this->GetFont());
 346
 347   if ((m_windowStyle & wxSL_VERTICAL) != wxSL_VERTICAL)
 348   {
 349     if ( m_windowStyle & wxSL_LABELS )
 350     {
 351     int min_len = 0;
 352
 353     GetWindowText((HWND) m_staticMin, buf, 300);
 354     GetTextExtent(buf, &min_len, &cyf,NULL,NULL, & this->GetFont());
 355
 356     int max_len = 0;
 357
 358     GetWindowText((HWND) m_staticMax, buf, 300);
 359     GetTextExtent(buf, &max_len, &cyf,NULL,NULL, & this->GetFont());
 360     if (m_staticValue)
 361     {
 362       int new_width = (int)(wxMax(min_len, max_len));
 363       int valueHeight = (int)cyf;
 364 #ifdef __WIN32__
 365       // For some reason, under Win95, the text edit control has
 366       // a lot of space before the first character
 367       new_width += 3*cx;
 368 #endif
 369       MoveWindow((HWND) m_staticValue, x_offset, y_offset, new_width, valueHeight, TRUE);
 370       x_offset += new_width + cx;
 371     }
 372
 373     MoveWindow((HWND) m_staticMin, x_offset, y_offset, (int)min_len, cy, TRUE);
 374     x_offset += (int)(min_len + cx);
 375
 376     int slider_length = (int)(w1 - x_offset - max_len - cx);
 377
 378     int slider_height = cy;
 379
 380     // Slider must have a minimum/default length/height
 381     if (slider_length < 100)
 382       slider_length = 100;
 383
 384     MoveWindow(GetHwnd(), x_offset, y_offset, slider_length, slider_height, TRUE);
 385     x_offset += slider_length + cx;
 386
 387     MoveWindow((HWND) m_staticMax, x_offset, y_offset, (int)max_len, cy, TRUE);
 388     }
 389     else
 390     {
 391         // No labels
 392         if ( w1 < 0 )
 393             w1 = 200;
 394         if ( h1 < 0 )
 395             h1 = 20;
 396         MoveWindow(GetHwnd(), x1, y1, w1, h1, TRUE);
 397     }
 398   }
 399   else
 400   {
 401     if ( m_windowStyle & wxSL_LABELS )
 402     {
 403     int min_len;
 404     GetWindowText((HWND) m_staticMin, buf, 300);
 405     GetTextExtent(buf, &min_len, &cyf,NULL,NULL,& this->GetFont());
 406
 407     int max_len;
 408     GetWindowText((HWND) m_staticMax, buf, 300);
 409     GetTextExtent(buf, &max_len, &cyf,NULL,NULL, & this->GetFont());
 410
 411     if (m_staticValue)
 412     {
 413       int new_width = (int)(wxMax(min_len, max_len));
 414       int valueHeight = (int)cyf;
 415 /*** Suggested change by George Tasker - remove this block...
 416 #ifdef __WIN32__
 417       // For some reason, under Win95, the text edit control has
 418       // a lot of space before the first character
 419       new_width += 3*cx;
 420 #endif
 421  ... and replace with following line: */
 422       new_width += cx;
 423
 424       MoveWindow((HWND) m_staticValue, x_offset, y_offset, new_width, valueHeight, TRUE);
 425       y_offset += valueHeight;
 426     }
 427
 428     MoveWindow((HWND) m_staticMin, x_offset, y_offset, (int)min_len, cy, TRUE);
 429     y_offset += cy;
 430
 431     int slider_length = (int)(h1 - y_offset - cy - cy);
 432
 433     // Use character height as an estimate of slider width (yes, width)
 434     int slider_width = cy;
 435
 436     // Slider must have a minimum/default length
 437     if (slider_length < 100)
 438       slider_length = 100;
 439
 440     MoveWindow(GetHwnd(), x_offset, y_offset, slider_width, slider_length, TRUE);
 441     y_offset += slider_length;
 442
 443     MoveWindow((HWND) m_staticMax, x_offset, y_offset, (int)max_len, cy, TRUE);
 444     }
 445     else
 446     {
 447         // No labels
 448         if ( w1 < 0 )
 449             w1 = 20;
 450         if ( h1 < 0 )
 451             h1 = 200;
 452         MoveWindow(GetHwnd(), x1, y1, w1, h1, TRUE);
 453     }
 454   }
 455 }
 456
 457 void wxSliderMSW::SetRange(int minValue, int maxValue)
 458 {
 459   m_rangeMin = minValue;
 460   m_rangeMax = maxValue;
 461
 462   ::SetScrollRange(GetHwnd(), SB_CTL, m_rangeMin, m_rangeMax, TRUE);
 463   wxChar buf[40];
 464   if ( m_staticMin )
 465   {
 466       wxSprintf(buf, _T("%d"), m_rangeMin);
 467       SetWindowText((HWND) m_staticMin, buf);
 468   }
 469
 470   if ( m_staticMax )
 471   {
 472     wxSprintf(buf, _T("%d"), m_rangeMax);
 473     SetWindowText((HWND) m_staticMax, buf);
 474   }
 475 }
 476
 477 WXHBRUSH wxSliderMSW::OnCtlColor(WXHDC pDC, WXHWND pWnd, WXUINT nCtlColor,
 478             WXUINT message, WXWPARAM wParam, WXLPARAM lParam)
 479 {
 480   if ( nCtlColor == CTLCOLOR_SCROLLBAR )
 481     return 0;
 482
 483   // Otherwise, it's a static
 484   if (GetParent()->GetTransparentBackground())
 485     SetBkMode((HDC) pDC, TRANSPARENT);
 486   else
 487     SetBkMode((HDC) pDC, OPAQUE);
 488
 489   ::SetBkColor((HDC) pDC, RGB(GetBackgroundColour().Red(), GetBackgroundColour().Green(), GetBackgroundColour().Blue()));
 490   ::SetTextColor((HDC) pDC, RGB(GetForegroundColour().Red(), GetForegroundColour().Green(), GetForegroundColour().Blue()));
 491
 492   wxBrush *backgroundBrush = wxTheBrushList->FindOrCreateBrush(GetBackgroundColour(), wxSOLID);
 493
 494   return (WXHBRUSH) backgroundBrush->GetResourceHandle();
 495 }
 496
 497 // For trackbars only
 498 void wxSliderMSW::SetTickFreq(int n, int pos)
 499 {
 500 }
 501
 502 void wxSliderMSW::SetPageSize(int pageSize)
 503 {
 504   m_pageSize = pageSize;
 505 }
 506
 507 int wxSliderMSW::GetPageSize() const
 508 {
 509   return m_pageSize;
 510 }
 511
 512 void wxSliderMSW::ClearSel()
 513 {
 514 }
 515
 516 void wxSliderMSW::ClearTicks()
 517 {
 518 }
 519
 520 void wxSliderMSW::SetLineSize(int lineSize)
 521 {
 522   m_lineSize = lineSize;
 523 }
 524
 525 int wxSliderMSW::GetLineSize() const
 526 {
 527   return m_lineSize;
 528 }
 529
 530 int wxSliderMSW::GetSelEnd() const
 531 {
 532   return 0;
 533 }
 534
 535 int wxSliderMSW::GetSelStart() const
 536 {
 537   return 0;
 538 }
 539
 540 void wxSliderMSW::SetSelection(int minPos, int maxPos)
 541 {
 542 }
 543
 544 void wxSliderMSW::SetThumbLength(int len)
 545 {
 546 }
 547
 548 int wxSliderMSW::GetThumbLength() const
 549 {
 550   return 0;
 551 }
 552
 553 void wxSliderMSW::SetTick(int tickPos)
 554 {
 555 }
 556
 557 bool wxSliderMSW::ContainsHWND(WXHWND hWnd) const
 558 {
 559     return ( hWnd == GetStaticMin() || hWnd == GetStaticMax() || hWnd == GetEditValue() );
 560 }
 561
 562 void wxSliderMSW::Command (wxCommandEvent & event)
 563 {
 564   SetValue (event.GetInt());
 565   ProcessCommand (event);
 566 }
 567
 568 bool wxSliderMSW::Show(bool show)
 569 {
 570     wxWindow::Show(show);
 571
 572     int cshow;
 573     if (show)
 574         cshow = SW_SHOW;
 575     else
 576         cshow = SW_HIDE;
 577
 578     if(m_staticValue)
 579         ShowWindow((HWND) m_staticValue, (BOOL)cshow);
 580     if(m_staticMin)
 581         ShowWindow((HWND) m_staticMin, (BOOL)cshow);
 582     if(m_staticMax)
 583         ShowWindow((HWND) m_staticMax, (BOOL)cshow);
 584     return TRUE;
 585 }
 586
 587