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lvlist.c
Package: shell.rar [view]
Upload User: xhy777
Upload Date: 2007-02-14
Package Size: 24088k
Code Size: 11k
Category:
Windows Kernel
Development Platform:
Visual C++
- // list view (small icons, multiple columns)
- #include "ctlspriv.h"
- #include "listview.h"
- #define COLUMN_VIEW
- void NEAR PASCAL ListView_LDrawItem(LV* plv, int i, LISTITEM FAR* pitem, HDC hdc, LPPOINT lpptOrg, RECT FAR* prcClip, UINT fDraw)
- {
- RECT rcIcon;
- RECT rcLabel;
- RECT rcBounds;
- RECT rcT;
- ListView_GetRects(plv, i, &rcIcon, &rcLabel, &rcBounds, NULL);
- if (!prcClip || IntersectRect(&rcT, &rcBounds, prcClip))
- {
- LV_ITEM item;
- char ach[CCHLABELMAX];
- UINT fText;
- if (lpptOrg)
- {
- OffsetRect(&rcIcon, lpptOrg->x - rcBounds.left,
- lpptOrg->y - rcBounds.top);
- OffsetRect(&rcLabel, lpptOrg->x - rcBounds.left,
- lpptOrg->y - rcBounds.top);
- }
- item.mask = LVIF_TEXT | LVIF_IMAGE | LVIF_STATE;
- item.iItem = i;
- item.iSubItem = 0;
- item.pszText = ach;
- item.cchTextMax = sizeof(ach);
- item.stateMask = LVIS_ALL;
- ListView_OnGetItem(plv, &item);
- fText = ListView_DrawImage(plv, &item, hdc,
- rcIcon.left, rcIcon.top, fDraw) | SHDT_ELLIPSES;
- // Don't draw the label if it is being edited.
- if (plv->iEdit != i)
- {
- if (fDraw & LVDI_TRANSTEXT)
- fText |= SHDT_TRANSPARENT;
- if (pitem->cxSingleLabel == SRECOMPUTE)
- ListView_RecomputeLabelSize(plv, pitem, i, hdc);
- if (pitem->cxSingleLabel < rcLabel.right - rcLabel.left)
- rcLabel.right = rcLabel.left + pitem->cxSingleLabel;
- SHDrawText(hdc, item.pszText, &rcLabel, LVCFMT_LEFT, fText,
- plv->cyLabelChar, plv->cxEllipses, plv->clrText,
- (plv->style & WS_DISABLED ? plv->clrBk : plv->clrTextBk));
- if ((fDraw & LVDI_FOCUS) && (pitem->state & LVIS_FOCUSED))
- DrawFocusRect(hdc, &rcLabel);
- }
- }
- }
- int NEAR ListView_LItemHitTest(LV* plv, int x, int y, UINT FAR* pflags)
- {
- int iHit;
- int i;
- int iCol;
- int xItem; //where is the x in relation to the item
- UINT flags;
- LISTITEM FAR* pitem;
- HDC hdc;
- flags = LVHT_NOWHERE;
- iHit = -1;
- #ifdef COLUMN_VIEW
- i = y / plv->cyItem;
- if (i >= 0 && i < plv->cItemCol)
- {
- iCol = (x + plv->xOrigin) / plv->cxItem;
- i += iCol * plv->cItemCol;
- if (i >= 0 && i < ListView_Count(plv))
- {
- iHit = i;
- xItem = x + plv->xOrigin - iCol * plv->cxItem;
- if (xItem < plv->cxState) {
- flags = LVHT_ONITEMSTATEICON;
- } else if (xItem < (plv->cxState + plv->cxSmIcon)) {
- flags = LVHT_ONITEMICON;
- }
- else
- {
- pitem = ListView_FastGetItemPtr(plv, i);
- if (pitem->cxSingleLabel == SRECOMPUTE)
- {
- hdc = ListView_RecomputeLabelSize(plv, pitem, i, NULL);
- ReleaseDC(HWND_DESKTOP, hdc);
- }
- if (xItem < (plv->cxSmIcon + plv->cxState + pitem->cxSingleLabel))
- flags = LVHT_ONITEMLABEL;
- }
- }
- }
- #else
- i = x / plv->cxItem;
- if (i < plv->cItemCol)
- {
- i += ((y + plv->xOrigin) / plv->cyItem) * plv->cItemCol;
- if (i < ListView_Count(plv))
- {
- iHit = i;
- flags = LVHT_ONITEMICON;
- }
- }
- #endif
- *pflags = flags;
- return iHit;
- }
- void NEAR ListView_LGetRects(LV* plv, int i, RECT FAR* prcIcon,
- RECT FAR* prcLabel, RECT FAR *prcBounds, RECT FAR* prcSelectBounds)
- {
- RECT rcIcon;
- RECT rcLabel;
- int x, y;
- int cItemCol = plv->cItemCol;
- if (cItemCol == 0)
- {
- // Called before other data has been initialized so call
- // update scrollbars which should make sure that that
- // we have valid data...
- ListView_UpdateScrollBars(plv);
- // but it's possible that updatescrollbars did nothing because of
- // LVS_NOSCROLL or redraw
- if (plv->cItemCol == 0)
- cItemCol = 1;
- else
- cItemCol = plv->cItemCol;
- }
- #ifdef COLUMN_VIEW
- x = (i / cItemCol) * plv->cxItem;
- y = (i % cItemCol) * plv->cyItem;
- rcIcon.left = x - plv->xOrigin + plv->cxState;
- rcIcon.top = y;
- #else
- x = (i % cItemCol) * plv->cxItem;
- y = (i / cItemCol) * plv->cyItem;
- rcIcon.left = x;
- rcIcon.top = y - plv->xOrigin;
- #endif
- rcIcon.right = rcIcon.left + plv->cxSmIcon;
- rcIcon.bottom = rcIcon.top + plv->cyItem;
- if (prcIcon)
- *prcIcon = rcIcon;
- rcLabel.left = rcIcon.right;
- rcLabel.right = rcIcon.left + plv->cxItem - plv->cxState;
- rcLabel.top = rcIcon.top;
- rcLabel.bottom = rcIcon.bottom;
- if (prcLabel)
- *prcLabel = rcLabel;
- if (prcBounds)
- {
- *prcBounds = rcLabel;
- prcBounds->left = rcIcon.left - plv->cxState;
- }
- if (prcSelectBounds)
- {
- *prcSelectBounds = rcLabel;
- prcSelectBounds->left = rcIcon.left;
- }
- }
- void NEAR ListView_LUpdateScrollBars(LV* plv)
- {
- RECT rcClient;
- int cItemCol;
- int cCol;
- int cColVis;
- SCROLLINFO si;
- Assert(plv);
- ListView_GetClientRect(plv, &rcClient, FALSE, NULL);
- #ifdef COLUMN_VIEW
- cColVis = (rcClient.right - rcClient.left) / plv->cxItem;
- cItemCol = max(1, (rcClient.bottom - rcClient.top) / plv->cyItem);
- #else
- cColVis = (rcClient.bottom - rcClient.top) / plv->cyItem;
- cItemCol = max(1, (rcClient.right - rcClient.left) / plv->cxItem);
- #endif
- cCol = (ListView_Count(plv) + cItemCol - 1) / cItemCol;
- // Make the client area smaller as appropriate, and
- // recompute cCol to reflect scroll bar.
- //
- si.cbSize = sizeof(SCROLLINFO);
- si.fMask = SIF_PAGE | SIF_RANGE | SIF_POS;
- si.nPage = cColVis;
- si.nMin = 0;
- #ifdef COLUMN_VIEW
- rcClient.bottom -= g_cyScrollbar;
- cItemCol = max(1, (rcClient.bottom - rcClient.top) / plv->cyItem);
- cCol = (ListView_Count(plv) + cItemCol - 1) / cItemCol;
- si.nPos = plv->xOrigin / plv->cxItem;
- si.nMax = cCol - 1;
- #ifdef IEWIN31_25
- plv->cxScrollPage = (int)si.nPage;
- SetScrollRange( plv->hwnd, SB_HORZ, (int) si.nMin,
- max( (int)(si.nMax-si.nPage+1), 0 ), FALSE );
- SetScrollPos( plv->hwnd, SB_HORZ, (int) si.nPos, TRUE );
- #else
- SetScrollInfo(plv->hwnd, SB_HORZ, &si, TRUE);
- #endif //IEWIN31_25
- #else
- rcClient.right -= cxScrollBar;
- cItemCol = max(1, (rcClient.right - rcClient.left) / plv->cxItem);
- cCol = (ListView_Count(plv) + cItemCol - 1) / cItemCol;
- si.nPos = plv->xOrigin / plv->cyItem;
- si.nMax = cCol - 1;
- #ifdef IEWIN31_25
- plv->cyScrollPage = si.nPage;
- SetScrollRange( plv->hwnd, SB_VERT, (int) si.nMin,
- max( (int) si.nMax-si.nPage+1, 0 ), FALSE );
- SetScrollPos( plv->hwnd, SB_VERT, (int) si.nPos, TRUE );
- #else
- SetScrollInfo(plv->hwnd, SB_VERT, &si, TRUE);
- #endif //IEWIN31_25
- #endif
- // Update number of visible lines...
- //
- if (plv->cItemCol != cItemCol)
- {
- plv->cItemCol = cItemCol;
- InvalidateRect(plv->hwnd, NULL, TRUE);
- }
- // make sure our position and page doesn't hang over max
- if ((si.nPos + (LONG)si.nPage - 1 > si.nMax) && si.nPos > 0) {
- int iNewPos, iDelta;
- iNewPos = (int)si.nMax - (int)si.nPage + 1;
- if (iNewPos < 0) iNewPos = 0;
- if (iNewPos != si.nPos) {
- iDelta = iNewPos - (int)si.nPos;
- #ifdef COLUMN_VIEW
- ListView_LScroll2(plv, iDelta, 0);
- #else
- ListView_LScroll2(plv, 0, iDelta);
- #endif
- ListView_LUpdateScrollBars(plv);
- }
- }
- // never have the other scrollbar
- #ifdef COLUMN_VIEW
- SetScrollRange(plv->hwnd, SB_VERT, 0, 0, TRUE);
- #else
- SetScrollRange(plv->hwnd, SB_HORZ, 0, 0, TRUE);
- #endif
- }
- void FAR PASCAL ListView_LScroll2(LV* plv, int dx, int dy)
- {
- #ifdef COLUMN_VIEW
- if (dx)
- {
- dx *= plv->cxItem;
- plv->xOrigin += dx;
- ScrollWindowEx(plv->hwnd, -dx, 0, NULL, NULL, NULL, NULL,
- SW_INVALIDATE | SW_ERASE);
- UpdateWindow(plv->hwnd);
- }
- #else
- if (dy)
- {
- dy *= plv->cyItem;
- plv->xOrigin += dy;
- ScrollWindowEx(plv->hwnd, 0, -dy, NULL, NULL, NULL, NULL,
- SW_INVALIDATE | SW_ERASE);
- UpdateWindow(plv->hwnd);
- }
- #endif
- }
- void NEAR ListView_LOnScroll(LV* plv, UINT code, int posNew)
- {
- RECT rcClient;
- int cPage;
- if (plv->hwndEdit)
- ListView_DismissEdit(plv, FALSE);
- ListView_GetClientRect(plv, &rcClient, TRUE, NULL);
- #ifdef COLUMN_VIEW
- cPage = (rcClient.right - rcClient.left) / plv->cxItem;
- ListView_ComOnScroll(plv, code, posNew, SB_HORZ, 1,
- cPage ? cPage : 1, ListView_LScroll2);
- #else
- cPage = (rcClient.bottom - rcClient.top) / plv->cyItem;
- ListView_ComOnScroll(plv, code, posNew, SB_VERT, 1,
- cPage ? cPage : 1, ListView_LScroll2);
- #endif
- }
- //------------------------------------------------------------------------------
- // This function will see if the size of column should be changed for the listview
- // It will check to see if the items between first and last exceed the current width
- // and if so will see if the columns are currently big enough. This wont happen
- // if we are not currently in listview or if the caller has set an explicit size.
- BOOL FAR PASCAL ListView_MaybeResizeListColumns(LV* plv, int iFirst, int iLast)
- {
- HDC hdc = NULL;
- int cxMaxLabel = 0;
- if (!ListView_IsListView(plv) || (plv->flags & LVF_COLSIZESET))
- return(FALSE);
- while (iFirst <= iLast)
- {
- LISTITEM FAR* pitem = ListView_FastGetItemPtr(plv, iFirst);
- if (pitem->cxSingleLabel == SRECOMPUTE)
- {
- hdc = ListView_RecomputeLabelSize(plv, pitem, iFirst, hdc);
- }
- if (pitem->cxSingleLabel > cxMaxLabel)
- cxMaxLabel = pitem->cxSingleLabel;
- iFirst++;
- }
- if (hdc)
- ReleaseDC(HWND_DESKTOP, hdc);
- // We have the max label width, see if this plus the rest of the slop will
- // cause us to want to resize.
- //
- cxMaxLabel += plv->cxSmIcon + g_cxIconMargin + plv->cxState;
- if (cxMaxLabel > g_cxScreen)
- cxMaxLabel = g_cxScreen;
- // Now see if we should resize the columns...
- if (cxMaxLabel > plv->cxItem)
- {
- int iScroll = plv->xOrigin / plv->cxItem;
- DebugMsg(DM_TRACE, "LV Resize Columns: %d", cxMaxLabel);
- ListView_ISetColumnWidth(plv, 0, cxMaxLabel, FALSE);
- plv->xOrigin = iScroll * plv->cxItem;
- return(TRUE);
- }
- return(FALSE);
- }