| 1 | ///////////////////////////////////////////////////////////////////////////// |
| 2 | // Name: scrolbar.cpp |
| 3 | // Purpose: wxScrollBar |
| 4 | // Author: David Webster |
| 5 | // Modified by: |
| 6 | // Created: 10/15/99 |
| 7 | // RCS-ID: $Id$ |
| 8 | // Copyright: (c) David Webster |
| 9 | // Licence: wxWindows licence |
| 10 | ///////////////////////////////////////////////////////////////////////////// |
| 11 | |
| 12 | // For compilers that support precompilation, includes "wx.h". |
| 13 | #include "wx/wxprec.h" |
| 14 | |
| 15 | #ifndef WX_PRECOMP |
| 16 | #include "wx/defs.h" |
| 17 | #include "wx/utils.h" |
| 18 | #endif |
| 19 | |
| 20 | #include "wx/scrolbar.h" |
| 21 | #include "wx/os2/private.h" |
| 22 | |
| 23 | IMPLEMENT_DYNAMIC_CLASS(wxScrollBar, wxControl) |
| 24 | |
| 25 | // Scrollbar |
| 26 | bool wxScrollBar::Create ( |
| 27 | wxWindow* pParent |
| 28 | , wxWindowID vId |
| 29 | , const wxPoint& rPos |
| 30 | , const wxSize& rSize |
| 31 | , long lStyle |
| 32 | #if wxUSE_VALIDATORS |
| 33 | , const wxValidator& rValidator |
| 34 | #endif |
| 35 | , const wxString& rsName |
| 36 | ) |
| 37 | { |
| 38 | int nX = rPos.x; |
| 39 | int nY = rPos.y; |
| 40 | int nWidth = rSize.x; |
| 41 | int nHeight = rSize.y; |
| 42 | |
| 43 | if (!pParent) |
| 44 | return FALSE; |
| 45 | pParent->AddChild(this); |
| 46 | SetName(rsName); |
| 47 | #if wxUSE_VALIDATORS |
| 48 | SetValidator(rValidator); |
| 49 | #endif |
| 50 | SetBackgroundColour(pParent->GetBackgroundColour()) ; |
| 51 | SetForegroundColour(pParent->GetForegroundColour()) ; |
| 52 | |
| 53 | if (vId == -1L) |
| 54 | m_windowId = (int)NewControlId(); |
| 55 | else |
| 56 | m_windowId = vId; |
| 57 | |
| 58 | if (nWidth == -1) |
| 59 | { |
| 60 | if (lStyle & wxHORIZONTAL) |
| 61 | nWidth = 140; |
| 62 | else |
| 63 | nWidth = 14; |
| 64 | } |
| 65 | if (nHeight == -1) |
| 66 | { |
| 67 | if (lStyle & wxVERTICAL) |
| 68 | nHeight = 140; |
| 69 | else |
| 70 | nHeight = 14; |
| 71 | } |
| 72 | |
| 73 | DWORD dwStyle = WS_VISIBLE; |
| 74 | |
| 75 | if (GetWindowStyleFlag() & wxCLIP_SIBLINGS) |
| 76 | dwStyle |= WS_CLIPSIBLINGS; |
| 77 | |
| 78 | DWORD dwDirection = (lStyle & wxHORIZONTAL) ? SBS_HORZ: SBS_VERT; |
| 79 | |
| 80 | HWND hScrollBar = ::WinCreateWindow( (HWND)GetHwndOf(pParent) |
| 81 | ,WC_SCROLLBAR |
| 82 | ,(PSZ)NULL |
| 83 | ,dwDirection | dwStyle |
| 84 | ,0, 0, 0, 0 |
| 85 | ,(HWND)GetHwndOf(pParent) |
| 86 | ,HWND_TOP |
| 87 | ,(HMENU)m_windowId |
| 88 | ,NULL |
| 89 | ,NULL |
| 90 | ); |
| 91 | |
| 92 | m_nPageSize = 1; |
| 93 | m_nViewSize = 1; |
| 94 | m_nObjectSize = 1; |
| 95 | ::WinSendMsg( hScrollBar |
| 96 | ,SBM_SETSCROLLBAR |
| 97 | ,(MPARAM)0 |
| 98 | ,MPFROM2SHORT(0,1) |
| 99 | ); |
| 100 | ::WinShowWindow( hScrollBar |
| 101 | ,TRUE |
| 102 | ); |
| 103 | SetFont(*wxSMALL_FONT); |
| 104 | |
| 105 | m_hWnd = hScrollBar; |
| 106 | |
| 107 | // |
| 108 | // Subclass again for purposes of dialog editing mode |
| 109 | // |
| 110 | SubclassWin((WXHWND)hScrollBar); |
| 111 | SetSize( nX |
| 112 | ,nY |
| 113 | ,nWidth |
| 114 | ,nHeight |
| 115 | ); |
| 116 | return TRUE; |
| 117 | } // end of wxScrollBar::Create |
| 118 | |
| 119 | wxScrollBar::~wxScrollBar() |
| 120 | { |
| 121 | } |
| 122 | |
| 123 | bool wxScrollBar::OS2OnScroll ( |
| 124 | int nOrientation |
| 125 | , WXWORD wParam |
| 126 | , WXWORD wPos |
| 127 | , WXHWND hControl |
| 128 | ) |
| 129 | { |
| 130 | int nPosition; |
| 131 | int nMaxPos; |
| 132 | int nTrackPos = wPos; |
| 133 | int nMinPos; |
| 134 | int nScrollInc; |
| 135 | wxEventType vScrollEvent = wxEVT_NULL; |
| 136 | |
| 137 | MRESULT vRange; |
| 138 | |
| 139 | // |
| 140 | // When we're dragging the scrollbar we can't use pos parameter because it |
| 141 | // is limited to 16 bits |
| 142 | // |
| 143 | if (wParam == SB_SLIDERPOSITION || wParam == SB_SLIDERTRACK) |
| 144 | { |
| 145 | SBCDATA vScrollInfo; |
| 146 | |
| 147 | vScrollInfo.sHilite = SB_SLIDERTRACK; |
| 148 | |
| 149 | ::WinSendMsg((HWND)GetHwnd(), WM_QUERYWINDOWPARAMS, (PVOID)&vScrollInfo, NULL); |
| 150 | |
| 151 | nTrackPos = vScrollInfo.posThumb; |
| 152 | nPosition = vScrollInfo.posFirst; |
| 153 | nMaxPos = vScrollInfo.posLast; |
| 154 | } |
| 155 | else |
| 156 | { |
| 157 | nPosition = (int)(MRESULT)::WinSendMsg((HWND)GetHwnd(), SBM_QUERYPOS, (MPARAM)NULL, (MPARAM)NULL); |
| 158 | vRange = ::WinSendMsg((HWND)GetHwnd(), SBM_QUERYRANGE, (MPARAM)NULL, (MPARAM)NULL); |
| 159 | nMinPos = SHORT1FROMMR(vRange); |
| 160 | nMaxPos = SHORT2FROMMR(vRange); |
| 161 | } |
| 162 | // |
| 163 | // A page size greater than one has the effect of reducing the effective |
| 164 | // range, therefore the range has already been boosted artificially - so |
| 165 | // reduce it again. |
| 166 | // |
| 167 | if (m_nPageSize > 1) |
| 168 | nMaxPos -= (m_nPageSize - 1); |
| 169 | switch (wParam) |
| 170 | { |
| 171 | case SB_LINEUP: |
| 172 | nScrollInc = -1; |
| 173 | vScrollEvent = wxEVT_SCROLL_LINEUP; |
| 174 | break; |
| 175 | |
| 176 | case SB_LINEDOWN: |
| 177 | nScrollInc = 1; |
| 178 | vScrollEvent = wxEVT_SCROLL_LINEDOWN; |
| 179 | break; |
| 180 | |
| 181 | case SB_PAGEUP: |
| 182 | nScrollInc = -GetPageSize(); |
| 183 | vScrollEvent = wxEVT_SCROLL_PAGEUP; |
| 184 | break; |
| 185 | |
| 186 | case SB_PAGEDOWN: |
| 187 | nScrollInc = GetPageSize(); |
| 188 | vScrollEvent = wxEVT_SCROLL_PAGEDOWN; |
| 189 | break; |
| 190 | |
| 191 | case SB_SLIDERTRACK: |
| 192 | nScrollInc = nTrackPos - nPosition; |
| 193 | vScrollEvent = wxEVT_SCROLL_THUMBTRACK; |
| 194 | break; |
| 195 | |
| 196 | case SB_ENDSCROLL: |
| 197 | nScrollInc = 0; |
| 198 | vScrollEvent = wxEVT_SCROLL_ENDSCROLL; |
| 199 | break; |
| 200 | |
| 201 | default: |
| 202 | nScrollInc = 0; |
| 203 | } |
| 204 | if (nScrollInc) |
| 205 | { |
| 206 | nPosition += nScrollInc; |
| 207 | |
| 208 | if (nPosition < 0) |
| 209 | nPosition = 0; |
| 210 | if (nPosition > nMaxPos) |
| 211 | nPosition = nMaxPos; |
| 212 | SetThumbPosition(nPosition); |
| 213 | } |
| 214 | else if ( vScrollEvent != wxEVT_SCROLL_THUMBRELEASE && |
| 215 | vScrollEvent != wxEVT_SCROLL_ENDSCROLL |
| 216 | ) |
| 217 | { |
| 218 | // |
| 219 | // Don't process the event if there is no displacement, |
| 220 | // unless this is a thumb release or end scroll event. |
| 221 | // |
| 222 | return FALSE; |
| 223 | } |
| 224 | |
| 225 | wxScrollEvent vEvent( vScrollEvent |
| 226 | ,m_windowId |
| 227 | ); |
| 228 | |
| 229 | vEvent.SetOrientation(IsVertical() ? wxVERTICAL : wxHORIZONTAL); |
| 230 | vEvent.SetPosition(nPosition); |
| 231 | vEvent.SetEventObject(this); |
| 232 | return GetEventHandler()->ProcessEvent(vEvent); |
| 233 | } // end of wxScrollBar::OS2OnScroll |
| 234 | |
| 235 | void wxScrollBar::SetThumbPosition ( |
| 236 | int nViewStart |
| 237 | ) |
| 238 | { |
| 239 | SBCDATA vInfo; |
| 240 | |
| 241 | memset(&vInfo, '\0', sizeof(SBCDATA)); |
| 242 | vInfo.cb = sizeof(SBCDATA); |
| 243 | vInfo.posThumb = nViewStart; |
| 244 | |
| 245 | ::WinSendMsg((HWND)GetHwnd(), WM_SETWINDOWPARAMS, (MPARAM)&vInfo, (MPARAM)NULL); |
| 246 | ::WinSendMsg((HWND)GetHwnd(), SBM_SETPOS, (MPARAM)nViewStart, (MPARAM)NULL); |
| 247 | } // end of wxScrollBar::SetThumbPosition |
| 248 | |
| 249 | int wxScrollBar::GetThumbPosition() const |
| 250 | { |
| 251 | return((int)(MRESULT)::WinSendMsg((HWND)GetHwnd(), SBM_QUERYPOS, (MPARAM)NULL, (MPARAM)NULL)); |
| 252 | } // end of wxScrollBar::GetThumbPosition |
| 253 | |
| 254 | void wxScrollBar::SetScrollbar ( |
| 255 | int nPosition |
| 256 | , int nThumbSize |
| 257 | , int nRange |
| 258 | , int nPageSize |
| 259 | , bool bRefresh |
| 260 | ) |
| 261 | { |
| 262 | SBCDATA vInfo; |
| 263 | // |
| 264 | // The lRange (number of scroll steps) is the |
| 265 | // object length minus the page size. |
| 266 | // |
| 267 | int nRange1 = wxMax((m_nObjectSize - m_nPageSize), 0); |
| 268 | |
| 269 | m_nViewSize = nPageSize; |
| 270 | m_nPageSize = nThumbSize; |
| 271 | m_nObjectSize = nRange; |
| 272 | |
| 273 | |
| 274 | // |
| 275 | // Try to adjust the lRange to cope with page size > 1 |
| 276 | // (see comment for SetPageLength) |
| 277 | // |
| 278 | if (m_nPageSize > 1 ) |
| 279 | { |
| 280 | nRange1 += (m_nPageSize - 1); |
| 281 | } |
| 282 | vInfo.cb = sizeof(SBCDATA); |
| 283 | vInfo.cVisible = m_nPageSize; |
| 284 | vInfo.posFirst = 0; |
| 285 | vInfo.posLast = nRange1; |
| 286 | vInfo.posThumb = nPosition; |
| 287 | |
| 288 | ::WinSendMsg((HWND)GetHwnd(), WM_SETWINDOWPARAMS, (MPARAM)&vInfo, (MPARAM)NULL); |
| 289 | } // end of wxScrollBar::SetScrollbar |
| 290 | |
| 291 | WXHBRUSH wxScrollBar::OnCtlColor ( |
| 292 | WXHDC hDC |
| 293 | , WXHWND hWnd |
| 294 | , WXUINT uCtlColor |
| 295 | , WXUINT uMessage |
| 296 | , WXWPARAM wParam |
| 297 | , WXLPARAM lParam |
| 298 | ) |
| 299 | { |
| 300 | // |
| 301 | // Does nothing under OS/2 |
| 302 | // |
| 303 | return 0; |
| 304 | } // end of wxScrollBar::OnCtlColor |
| 305 | |
| 306 | void wxScrollBar::Command ( |
| 307 | wxCommandEvent& rEvent |
| 308 | ) |
| 309 | { |
| 310 | SetThumbPosition(rEvent.GetInt()); |
| 311 | ProcessCommand(rEvent); |
| 312 | } // end of wxScrollBar::Command |
| 313 | |