BOOL WINAPI SetScrollRangeEx (HWND hWnd, int iSBar, int iMinPos, int iMaxPos) /* jmt: iSBar not used */ { PMWSCROLLBARINFO pSBar; HWND pWin; RECT rcBar; DWORD dwStyle; /* jmt:2k0820 */ pWin = (HWND)hWnd; if ( !(pSBar = wndGetScrollbar (pWin)) ) return FALSE; pSBar->minPos = (iMinPos < iMaxPos)?iMinPos:iMaxPos; pSBar->maxPos = (iMinPos > iMaxPos)?iMinPos:iMaxPos; /* validate parameters. */ if (pSBar->curPos < pSBar->minPos) pSBar->curPos = pSBar->minPos; if (pSBar->pageStep <= 0) pSBar->pageStep = 0; else if (pSBar->pageStep > (pSBar->maxPos - pSBar->minPos + 1)) pSBar->pageStep = pSBar->maxPos - pSBar->minPos + 1; { int max = pSBar->maxPos; max -= ((pSBar->pageStep - 1) > 0)?(pSBar->pageStep - 1):0; if (pSBar->curPos > max) pSBar->curPos = max; } dwStyle = (GetWindowStyle (hWnd) & SBS_TYPEMASK); /* jmt: 2k0820 */ if (dwStyle == SBS_VERT) { wndGetVScrollbarRect (pWin, &rcBar); rcBar.left --; rcBar.right --; } else { wndGetHScrollbarRect (pWin, &rcBar); rcBar.top --; rcBar.bottom --; } wndScrollbarPos (pWin, dwStyle == SBS_HORZ, &rcBar); #if 0 SendMessage (hWnd, WM_NCPAINT, 0, (LPARAM)(&rcBar)); #else MwPaintScrollbars(hWnd,NULL,dwStyle); /* a must */ #endif return TRUE; }
BOOL SetScrollPosEx (HWND hWnd, int iSBar, int iNewPos) /* jmt: iSBar not used */ { PMWSCROLLBARINFO pSBar; HWND pWin; RECT rcBar; DWORD dwStyle; /* jmt:2k0820 */ pWin = (HWND)hWnd; if ( !(pSBar = wndGetScrollBar (pWin)) ) return FALSE; if (iNewPos < pSBar->minPos) pSBar->curPos = pSBar->minPos; else pSBar->curPos = iNewPos; { int max = pSBar->maxPos; max -= ((pSBar->pageStep - 1) > 0)?(pSBar->pageStep - 1):0; if (pSBar->curPos > max) pSBar->curPos = max; } dwStyle = (GetWindowStyle (hWnd) & SBS_TYPEMASK); /* jmt: 2k0820 */ if (dwStyle == SBS_VERT) { wndGetVScrollBarRect (pWin, &rcBar); rcBar.left --; rcBar.right --; } else { wndGetHScrollBarRect (pWin, &rcBar); rcBar.top --; rcBar.bottom --; } wndScrollBarPos (pWin, dwStyle == SBS_HORZ, &rcBar); #if 0 SendMessage (hWnd, WM_NCPAINT, 0, (LPARAM)(&rcBar)); #else MwPaintScrollbars(hWnd,NULL,dwStyle); /* a must */ #endif return TRUE; }
BOOL WINAPI EnableScrollBarEx (HWND hWnd, int iSBar, BOOL bEnable) /* jmt: iSBar not used */ { PMWSCROLLBARINFO pSBar; HWND pWin; BOOL bPrevState; RECT rcBar; DWORD dwStyle; /* jmt:2k0820 */ pWin = (HWND)hWnd; if ( !(pSBar = wndGetScrollbar (pWin)) ) return FALSE; bPrevState = !(pSBar->status & SBS_DISABLED); if (bEnable && !bPrevState) pSBar->status &= ~SBS_DISABLED; else if (!bEnable && bPrevState) pSBar->status |= SBS_DISABLED; else return FALSE; dwStyle = (GetWindowStyle (hWnd) & SBS_TYPEMASK); /* jmt: 2k0820 */ if (dwStyle == SBS_VERT) { wndGetVScrollbarRect (pWin, &rcBar); rcBar.left --; rcBar.right --; } else { wndGetHScrollbarRect (pWin, &rcBar); rcBar.top --; rcBar.bottom --; } #if 0 SendMessage (hWnd, WM_NCPAINT, 0, (LPARAM)(&rcBar)); #else MwPaintScrollbars(hWnd,NULL,dwStyle); /* a must */ #endif return TRUE; }
static LRESULT CALLBACK ScrollbarControlProc (HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam) /* jmt:2k0820 */ { DWORD dwStyle; MWSCROLLBARINFO* pData; int moveRange; RECT rcBar; dwStyle = (GetWindowStyle (hwnd) & SBS_TYPEMASK); switch (message) { case WM_CREATE: if (!(pData = malloc (sizeof (MWSCROLLBARINFO)))) { fprintf(stderr, "Create scroll bar control failure!\n"); return -1; } pData->minPos=0; /* min value of scroll range.*/ /* max value of scroll range.*/ pData->maxPos=0; if (dwStyle==SBS_VERT) moveRange=((hwnd->winrect.bottom-hwnd->winrect.top) -((hwnd->winrect.right-hwnd->winrect.left)<<1)); else moveRange=((hwnd->winrect.right-hwnd->winrect.left) -((hwnd->winrect.bottom-hwnd->winrect.top)<<1)); if (moveRange > MWM_MINBARLEN) { pData->maxPos=moveRange / MWM_MINBARLEN; if( (moveRange % MWM_MINBARLEN) ) pData->maxPos++; } printf("maxPos=%d\n",pData->maxPos); pData->curPos=0; /* current scroll pos.*/ /* steps per page.*/ pData->pageStep=1; if ( (pData->maxPos - 2) > 1) pData->pageStep = pData->maxPos - 2; printf("pageStep=%d\n",pData->pageStep); pData->barStart=0; /* start pixel of bar.*/ pData->barLen=MWM_MINBARLEN; /* length of bar.*/ pData->status=SBS_UNKNOWN; /* status of scroll bar.*/ #if 0 /* jmt: must handle WM_MOVE */ pData->rc=hwnd->winrect; /* screen coordinates position*/ #endif hwnd->userdata = (DWORD)pData; if (dwStyle == SBS_VERT) { wndGetVScrollBarRect (hwnd, &rcBar); rcBar.left --; rcBar.right --; } else { wndGetHScrollBarRect (hwnd, &rcBar); rcBar.top --; rcBar.bottom --; } /* adjust pData->barLen */ wndScrollBarPos (hwnd, dwStyle == SBS_HORZ, &rcBar); break; case WM_DESTROY: free ((void *)(hwnd->userdata)); break; case WM_PAINT: MwPaintScrollbars(hwnd,NULL,dwStyle); break; case WM_NCLBUTTONDOWN: case WM_NCLBUTTONDBLCLK: case WM_NCMOUSEMOVE: case WM_NCLBUTTONUP: MwHandleMessageScrollbar(hwnd, wParam, lParam, message, dwStyle); break; case WM_HSCROLL: case WM_VSCROLL: { int newTop,itemCount,itemVisibles; pData = (MWSCROLLBARINFO *)hwnd->userdata; newTop = pData->curPos; itemCount = pData->maxPos - pData->minPos + 1; itemVisibles = pData->pageStep; switch(wParam) { case SB_LINEDOWN: #define ITEM_BOTTOM(x) (x->curPos + itemVisibles - 1) if (ITEM_BOTTOM (pData) < (itemCount - 1 )) { newTop ++; } break; case SB_LINEUP: if (pData->curPos > 0) { newTop --; } break; case SB_PAGEDOWN: if ((pData->curPos + (itemVisibles << 1)) <= itemCount) newTop += itemVisibles; else newTop = itemCount - itemVisibles; if (newTop < 0) return 0; break; case SB_PAGEUP: if (pData->curPos >= itemVisibles) newTop -= itemVisibles; else newTop = 0; break; case SB_THUMBTRACK: newTop = (int)lParam; break; } pData->curPos = newTop; SendMessage (hwnd, WM_PAINT, 0, 0); sbSetScrollInfo (hwnd, pData, TRUE); return 0; } break; default: return DefWindowProc (hwnd, message, wParam, lParam); } return 0; }
BOOL SetScrollInfoEx (HWND hWnd, int iSBar, LPCSCROLLINFO lpsi, BOOL fRedraw) /* jmt: iSBar not used */ { PMWSCROLLBARINFO pSBar; HWND pWin; RECT rcBar; DWORD dwStyle; /* jmt:2k0820 */ pWin = (HWND)hWnd; if ( !(pSBar = wndGetScrollBar (pWin)) ) return FALSE; if( lpsi->fMask & SIF_RANGE ) { pSBar->minPos = (lpsi->nMin < lpsi->nMax)?lpsi->nMin:lpsi->nMax; pSBar->maxPos = (lpsi->nMin < lpsi->nMax)?lpsi->nMax:lpsi->nMin; } if( lpsi->fMask & SIF_POS ) pSBar->curPos = lpsi->nPos; if( lpsi->fMask & SIF_PAGE ) pSBar->pageStep = lpsi->nPage; /* validate parameters. */ if (pSBar->curPos < pSBar->minPos) pSBar->curPos = pSBar->minPos; if (pSBar->pageStep <= 0) pSBar->pageStep = 0; else if (pSBar->pageStep > (pSBar->maxPos - pSBar->minPos + 1)) pSBar->pageStep = pSBar->maxPos - pSBar->minPos + 1; { int max = pSBar->maxPos; max -= ((pSBar->pageStep - 1) > 0)?(pSBar->pageStep - 1):0; if (pSBar->curPos > max) pSBar->curPos = max; } dwStyle = (GetWindowStyle (hWnd) & SBS_TYPEMASK); /* jmt: 2k0820 */ if(fRedraw) { if (dwStyle == SBS_VERT) { wndGetVScrollBarRect (pWin, &rcBar); rcBar.left --; rcBar.right --; } else { wndGetHScrollBarRect (pWin, &rcBar); rcBar.top --; rcBar.bottom --; } wndScrollBarPos (pWin, dwStyle == SBS_HORZ, &rcBar); #if 0 SendMessage (hWnd, WM_NCPAINT, 0, (LPARAM)(&rcBar)); #else MwPaintScrollbars(hWnd,NULL,dwStyle); /* a must */ #endif } return TRUE; }
/* handle a non-client message for a scrollbar*/ void MwHandleMessageScrollbar(HWND hwnd, WPARAM hitcode, LPARAM lParam, UINT msg, DWORD style) { int pos = SBS_UNKNOWN; BOOL vertbar = (style==SBS_VERT); BOOL horzbar = (style==SBS_HORZ); int * pStat; POINT pt; RECT rc; static BOOL bDraw; static int downPos = SBS_UNKNOWN; static int sbCode; int newThumbPos; int itemMoveable,itemCount,itemVisible,moveRange; /* jmt:2k0819 */ int moveTop,moveBottom,moveLeft,moveRight; /* jmt:2k0819 */ int cx,cy; MWSCROLLBARINFO* pData; pData = (MWSCROLLBARINFO *)hwnd->userdata; rc = hwnd->winrect; cx=rc.right-rc.left; cy=rc.bottom-rc.top; POINTSTOPOINT(pt, lParam); for (;;) { /* use for() to allow break statement*/ if (vertbar) { pStat = &pData->status; rc = hwnd->winrect; rc.bottom = rc.top + cx; if (PtInRect(&rc, pt)) { pos = SBS_UPARROW; break; } rc.bottom = hwnd->winrect.bottom; rc.top = rc.bottom - cx; if (PtInRect(&rc, pt)) { pos = SBS_DOWNARROW; break; } pos = SBS_VERTTHUMB; } else if (horzbar) { pStat = &pData->status; rc = hwnd->winrect; rc.right = rc.left + cy; if (PtInRect(&rc, pt)) { pos = SBS_LEFTARROW; break; } rc.right = hwnd->winrect.right; rc.left = rc.right - cy; if (PtInRect(&rc, pt)) { pos = SBS_RIGHTARROW; break; } pos = SBS_HORZTHUMB; } else return; break; } if (pos == SBS_UNKNOWN) return; *pStat &= ~SBS_MASK; /* remove stray mouse states*/ if (msg == WM_NCLBUTTONDOWN || msg == WM_NCLBUTTONDBLCLK) *pStat |= pos; else *pStat &= ~pos; if (msg == WM_NCLBUTTONDOWN || msg == WM_NCLBUTTONDBLCLK) bDraw=TRUE; if (bDraw) MwPaintScrollbars(hwnd, NULL,style); if (pos == SBS_UPARROW || pos == SBS_LEFTARROW) /* jmt:2k0820 */ { if (pData->curPos != pData->minPos) sbCode = SB_LINEUP; } else if (pos == SBS_DOWNARROW || pos == SBS_RIGHTARROW) /* jmt:2k0820 */ { if (pData->curPos != pData->maxPos) sbCode = SB_LINEDOWN; } else if (pos == SBS_VERTTHUMB || pos == SBS_HORZTHUMB) { sbCode = SB_THUMBTRACK; } switch(msg) { case WM_NCLBUTTONDOWN: case WM_NCLBUTTONDBLCLK: downPos = pos; break; case WM_NCMOUSEMOVE: if (vertbar) { if (sbCode == SB_THUMBTRACK && downPos == SBS_VERTTHUMB) { /* jmt(2k0819): new algorithm for SB_THUMBTRACK */ rc = hwnd->winrect; moveTop = rc.top + cx; moveBottom = hwnd->winrect.bottom - cx; moveRange = moveBottom - moveTop; itemCount = pData->maxPos - pData->minPos + 1; itemVisible = pData->pageStep; itemMoveable = itemCount - itemVisible + 1; newThumbPos = ((pt.y - moveTop) * itemMoveable) / moveRange; printf("((%d-%d)*%d)/%d=%d\n", pt.y,moveTop,itemMoveable,moveRange,newThumbPos); if ( newThumbPos >= pData->minPos && newThumbPos <= pData->maxPos) { SendMessage (hwnd, WM_VSCROLL, SB_THUMBTRACK, newThumbPos); SendMessage (GetParent(hwnd), WM_VSCROLL, SB_THUMBTRACK, newThumbPos); } break; } } if (horzbar) { if (sbCode == SB_THUMBTRACK && downPos == SBS_HORZTHUMB) { /* jmt(2k0819): new algorithm for SB_THUMBTRACK */ rc = hwnd->winrect; moveLeft = rc.left + cy; moveRight = hwnd->winrect.right - cy; moveRange = moveRight - moveLeft; itemCount = pData->maxPos - pData->minPos + 1; itemVisible = pData->pageStep; itemMoveable = itemCount - itemVisible + 1; newThumbPos = ((pt.x - moveLeft) * itemMoveable) / moveRange; printf("((%d-%d)*%d)/%d=%d\n", pt.y,moveLeft,itemMoveable,moveRange,newThumbPos); if ( newThumbPos >= pData->minPos && newThumbPos <= pData->maxPos) { SendMessage (hwnd, WM_HSCROLL, SB_THUMBTRACK, newThumbPos); SendMessage (GetParent(hwnd), WM_HSCROLL, SB_THUMBTRACK, newThumbPos); } break; } } break; case WM_NCLBUTTONUP: bDraw=FALSE; downPos = SBS_UNKNOWN; if (sbCode==SB_THUMBTRACK) { if (vertbar) { /* jmt(2k0819): new algorithm for SB_THUMBTRACK */ rc = hwnd->winrect; moveTop = rc.top + cx; moveBottom = hwnd->winrect.bottom - cx; moveRange = moveBottom - moveTop; itemCount = pData->maxPos - pData->minPos + 1; itemVisible = pData->pageStep; itemMoveable = itemCount - itemVisible + 1; newThumbPos = ((pt.y - moveTop) * itemMoveable) / moveRange; printf("((%d-%d)*%d)/%d=%d\n", pt.y,moveTop,itemMoveable,moveRange,newThumbPos); if ( newThumbPos >= pData->minPos && newThumbPos <= pData->maxPos) { SendMessage (hwnd, WM_VSCROLL, SB_THUMBTRACK, newThumbPos); SendMessage (GetParent(hwnd), WM_VSCROLL, SB_THUMBTRACK, newThumbPos); } break; /* case */ } if (horzbar) { /* jmt(2k0819): new algorithm for SB_THUMBTRACK */ rc = hwnd->winrect; moveLeft = rc.left + cy; moveRight = hwnd->winrect.right - cy; moveRange = moveRight - moveLeft; itemCount = pData->maxPos - pData->minPos + 1; itemVisible = pData->pageStep; itemMoveable = itemCount - itemVisible + 1; newThumbPos = ((pt.x - moveLeft) * itemMoveable) / moveRange; printf("((%d-%d)*%d)/%d=%d\n", pt.y,moveLeft,itemMoveable,moveRange,newThumbPos); if ( newThumbPos >= pData->minPos && newThumbPos <= pData->maxPos) { SendMessage (hwnd, WM_HSCROLL, SB_THUMBTRACK, newThumbPos); SendMessage (GetParent(hwnd), WM_HSCROLL, SB_THUMBTRACK, newThumbPos); } break; /* case */ } } else { if (vertbar) { SendMessage (hwnd, WM_VSCROLL, sbCode, 0); SendMessage (GetParent(hwnd), WM_VSCROLL, sbCode, 0); } if (horzbar) { SendMessage (hwnd, WM_HSCROLL, sbCode, 0); SendMessage (GetParent(hwnd), WM_HSCROLL, sbCode, 0); } } break; } }