Authors: Ulrich Czekalla <ulrich@codeweavers.com>, Huw Davies <huw@codeweavers.com>
Added drag and drop support to listview.
This commit is contained in:
Alexandre Julliard
parent
3ce815e7f3
commit
55cb8177b5
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@ -95,7 +95,7 @@
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* -- LVS_EX_UNDERLINEHOT
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*
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* Notifications:
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* -- LVN_BEGINDRAG, LVN_BEGINRDRAG
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* -- LVN_BEGINRDRAG
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* -- LVN_BEGINSCROLL, LVN_ENDSCROLL
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* -- LVN_GETINFOTIP
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* -- LVN_HOTTRACK
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@ -107,7 +107,6 @@
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*
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* Messages:
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* -- LVM_CANCELEDITLABEL
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* -- LVM_CREATEDRAGIMAGE
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* -- LVM_ENABLEGROUPVIEW
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* -- LVM_GETBKIMAGE, LVM_SETBKIMAGE
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* -- LVM_GETGROUPINFO, LVM_SETGROUPINFO
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@ -4000,7 +3999,70 @@ static DWORD LISTVIEW_ApproximateViewRect(LISTVIEW_INFO *infoPtr, INT nItemCount
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return dwViewRect;
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}
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/* << LISTVIEW_CreateDragImage >> */
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/***
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* DESCRIPTION:
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* Create a drag image list for the specified item.
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*
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* PARAMETER(S):
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* [I] infoPtr : valid pointer to the listview structure
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* [I] iItem : index of item
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* [O] lppt : Upperr-left corner of the image
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*
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* RETURN:
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* Returns a handle to the image list if successful, NULL otherwise.
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*/
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static HIMAGELIST LISTVIEW_CreateDragImage(LISTVIEW_INFO *infoPtr, INT iItem, LPPOINT lppt)
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{
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RECT rcItem;
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SIZE size;
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POINT pos;
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HDC hdc, hdcOrig;
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HBITMAP hbmp, hOldbmp;
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HIMAGELIST dragList = 0;
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TRACE("iItem=%d Count=%d \n", iItem, infoPtr->nItemCount);
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if (iItem < 0 || iItem >= infoPtr->nItemCount)
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return 0;
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rcItem.left = LVIR_BOUNDS;
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if (!LISTVIEW_GetItemRect(infoPtr, iItem, &rcItem))
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return 0;
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lppt->x = rcItem.left;
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lppt->y = rcItem.top;
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size.cx = rcItem.right - rcItem.left;
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size.cy = rcItem.bottom - rcItem.top;
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hdcOrig = GetDC(infoPtr->hwndSelf);
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hdc = CreateCompatibleDC(hdcOrig);
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hbmp = CreateCompatibleBitmap(hdcOrig, size.cx, size.cy);
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hOldbmp = SelectObject(hdc, hbmp);
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rcItem.left = rcItem.top = 0;
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rcItem.right = size.cx;
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rcItem.bottom = size.cy;
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FillRect(hdc, &rcItem, infoPtr->hBkBrush);
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pos.x = pos.y = 0;
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if (LISTVIEW_DrawItem(infoPtr, hdc, iItem, 0, pos, infoPtr->cditemmode))
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{
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dragList = ImageList_Create(size.cx, size.cy, ILC_COLOR, 10, 10);
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SelectObject(hdc, hOldbmp);
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ImageList_Add(dragList, hbmp, 0);
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}
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else
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SelectObject(hdc, hOldbmp);
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DeleteObject(hbmp);
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DeleteDC(hdc);
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ReleaseDC(infoPtr->hwndSelf, hdcOrig);
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TRACE("ret=%p\n", dragList);
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return dragList;
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}
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/***
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@ -7676,6 +7738,68 @@ static LRESULT LISTVIEW_KillFocus(LISTVIEW_INFO *infoPtr)
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return 0;
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}
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/***
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* DESCRIPTION:
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* Track mouse/dragging
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*
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* PARAMETER(S):
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* [I] infoPtr : valid pointer to the listview structure
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* [I] pt : mouse coordinate
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*
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* RETURN:
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* Zero
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*/
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static LRESULT LISTVIEW_TrackMouse(LISTVIEW_INFO *infoPtr, POINT pt)
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{
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INT cxDrag = GetSystemMetrics(SM_CXDRAG);
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INT cyDrag = GetSystemMetrics(SM_CYDRAG);
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RECT r;
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MSG msg;
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TRACE("\n");
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r.top = pt.y - cyDrag;
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r.left = pt.x - cxDrag;
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r.bottom = pt.y + cyDrag;
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r.right = pt.x + cxDrag;
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SetCapture(infoPtr->hwndSelf);
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while (1)
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{
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if (PeekMessageW(&msg, 0, 0, 0, PM_REMOVE | PM_NOYIELD))
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{
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if (msg.message == WM_MOUSEMOVE)
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{
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pt.x = (short)LOWORD(msg.lParam);
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pt.y = (short)HIWORD(msg.lParam);
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if (PtInRect(&r, pt))
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continue;
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else
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{
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ReleaseCapture();
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return 1;
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}
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}
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else if (msg.message >= WM_LBUTTONDOWN &&
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msg.message <= WM_RBUTTONDBLCLK)
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{
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break;
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}
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DispatchMessageW(&msg);
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}
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if (GetCapture() != infoPtr->hwndSelf)
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return 0;
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}
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ReleaseCapture();
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return 0;
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}
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/***
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* DESCRIPTION:
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* Processes double click messages (left mouse button).
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@ -7747,6 +7871,20 @@ static LRESULT LISTVIEW_LButtonDown(LISTVIEW_INFO *infoPtr, WORD wKey, POINTS pt
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infoPtr->nEditLabelItem = -1;
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if ((nItem >= 0) && (nItem < infoPtr->nItemCount))
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{
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if (LISTVIEW_TrackMouse(infoPtr, lvHitTestInfo.pt))
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{
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NMLISTVIEW nmlv;
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ZeroMemory(&nmlv, sizeof(nmlv));
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nmlv.iItem = nItem;
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nmlv.ptAction.x = lvHitTestInfo.pt.x;
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nmlv.ptAction.y = lvHitTestInfo.pt.y;
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notify_listview(infoPtr, LVN_BEGINDRAG, &nmlv);
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return 0;
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}
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if (infoPtr->dwStyle & LVS_SINGLESEL)
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{
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if (LISTVIEW_GetItemState(infoPtr, nItem, LVIS_SELECTED))
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@ -8500,7 +8638,8 @@ LISTVIEW_WindowProc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
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/* case LVM_CANCELEDITLABEL: */
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/* case LVM_CREATEDRAGIMAGE: */
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case LVM_CREATEDRAGIMAGE:
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return (LRESULT)LISTVIEW_CreateDragImage(infoPtr, (INT)wParam, (LPPOINT)lParam);
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case LVM_DELETEALLITEMS:
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return LISTVIEW_DeleteAllItems(infoPtr);
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