+++ /dev/null
-/*
- * Drag List control
- *
- * Copyright 1999 Eric Kohl
- * Copyright 2004 Robert Shearman
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2.1 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
- *
- * NOTES
- *
- * This code was audited for completeness against the documented features
- * of Comctl32.dll version 6.0 on Mar. 10, 2004, by Robert Shearman.
- *
- * Unless otherwise noted, we believe this code to be complete, as per
- * the specification mentioned above.
- * If you discover missing features or bugs please note them below.
- *
- */
-
-#include "comctl32.h"
-
-WINE_DEFAULT_DEBUG_CHANNEL(commctrl);
-
-#define DRAGLIST_SUBCLASSID 0
-#define DRAGLIST_SCROLLPERIOD 200
-#define DRAGLIST_TIMERID 666
-
-/* properties relating to IDI_DRAGICON */
-#define DRAGICON_HOTSPOT_X 17
-#define DRAGICON_HOTSPOT_Y 7
-#define DRAGICON_HEIGHT 32
-
-/* internal Wine specific data for the drag list control */
-typedef struct _DRAGLISTDATA
-{
- /* are we currently in dragging mode? */
- BOOL dragging;
-
- /* cursor to use as determined by DL_DRAGGING notification.
- * NOTE: as we use LoadCursor we don't have to use DeleteCursor
- * when we are finished with it */
- HCURSOR cursor;
-
- /* optimisation so that we don't have to load the cursor
- * all of the time whilst dragging */
- LRESULT last_dragging_response;
-
- /* prevents flicker with drawing drag arrow */
- RECT last_drag_icon_rect;
-} DRAGLISTDATA;
-
-UINT uDragListMessage = 0; /* registered window message code */
-static DWORD dwLastScrollTime = 0;
-static HICON hDragArrow = NULL;
-
-/***********************************************************************
- * DragList_Notify (internal)
- *
- * Sends notification messages to the parent control. Note that it
- * does not use WM_NOTIFY like the rest of the controls, but a registered
- * window message.
- */
-static LRESULT DragList_Notify(HWND hwndLB, UINT uNotification)
-{
- DRAGLISTINFO dli;
- dli.hWnd = hwndLB;
- dli.uNotification = uNotification;
- GetCursorPos(&dli.ptCursor);
- return SendMessageW(GetParent(hwndLB), uDragListMessage, GetDlgCtrlID(hwndLB), (LPARAM)&dli);
-}
-
-/* cleans up after dragging */
-static void DragList_EndDrag(HWND hwnd, DRAGLISTDATA * data)
-{
- KillTimer(hwnd, DRAGLIST_TIMERID);
- ReleaseCapture();
- /* clear any drag insert icon present */
- InvalidateRect(GetParent(hwnd), &data->last_drag_icon_rect, TRUE);
- /* clear data for next use */
- memset(data, 0, sizeof(*data));
-}
-
-/***********************************************************************
- * DragList_SubclassWindowProc (internal)
- *
- * Handles certain messages to enable dragging for the ListBox and forwards
- * the rest to the ListBox.
- */
-static LRESULT CALLBACK
-DragList_SubclassWindowProc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam, UINT_PTR uIdSubclass, DWORD_PTR dwRefData)
-{
- DRAGLISTDATA * data = (DRAGLISTDATA*)dwRefData;
- switch (uMsg)
- {
- case WM_LBUTTONDOWN:
- SetFocus(hwnd);
- data->dragging = DragList_Notify(hwnd, DL_BEGINDRAG);
- if (data->dragging)
- {
- SetCapture(hwnd);
- SetTimer(hwnd, DRAGLIST_TIMERID, DRAGLIST_SCROLLPERIOD, NULL);
- }
- /* note that we don't absorb this message to let the list box
- * do its thing (normally selecting an item) */
- break;
-
- case WM_KEYDOWN:
- case WM_RBUTTONDOWN:
- /* user cancelled drag by either right clicking or
- * by pressing the escape key */
- if ((data->dragging) &&
- ((uMsg == WM_RBUTTONDOWN) || (wParam == VK_ESCAPE)))
- {
- /* clean up and absorb message */
- DragList_EndDrag(hwnd, data);
- DragList_Notify(hwnd, DL_CANCELDRAG);
- return 0;
- }
- break;
-
- case WM_MOUSEMOVE:
- case WM_TIMER:
- if (data->dragging)
- {
- LRESULT cursor = DragList_Notify(hwnd, DL_DRAGGING);
- /* optimisation so that we don't have to load the cursor
- * all of the time whilst dragging */
- if (data->last_dragging_response != cursor)
- {
- switch (cursor)
- {
- case DL_STOPCURSOR:
- data->cursor = LoadCursorW(NULL, (LPCWSTR)IDC_NO);
- SetCursor(data->cursor);
- break;
- case DL_COPYCURSOR:
- data->cursor = LoadCursorW(COMCTL32_hModule, (LPCWSTR)IDC_COPY);
- SetCursor(data->cursor);
- break;
- case DL_MOVECURSOR:
- data->cursor = LoadCursorW(NULL, (LPCWSTR)IDC_ARROW);
- SetCursor(data->cursor);
- break;
- }
- data->last_dragging_response = cursor;
- }
- /* don't pass this message on to List Box */
- return 0;
- }
- break;
-
- case WM_LBUTTONUP:
- if (data->dragging)
- {
- DragList_EndDrag(hwnd, data);
- DragList_Notify(hwnd, DL_DROPPED);
- }
- break;
-
- case WM_GETDLGCODE:
- /* tell dialog boxes that we want to receive WM_KEYDOWN events
- * for keys like VK_ESCAPE */
- if (data->dragging)
- return DLGC_WANTALLKEYS;
- break;
- case WM_NCDESTROY:
- RemoveWindowSubclass(hwnd, DragList_SubclassWindowProc, DRAGLIST_SUBCLASSID);
- Free(data);
- break;
- }
- return DefSubclassProc(hwnd, uMsg, wParam, lParam);
-}
-
-/***********************************************************************
- * MakeDragList (COMCTL32.13)
- *
- * Makes a normal ListBox into a DragList by subclassing it.
- *
- * RETURNS
- * Success: Non-zero
- * Failure: Zero
- */
-BOOL WINAPI MakeDragList (HWND hwndLB)
-{
- DRAGLISTDATA *data = Alloc(sizeof(DRAGLISTDATA));
-
- TRACE("(%p)\n", hwndLB);
-
- if (!uDragListMessage)
- uDragListMessage = RegisterWindowMessageW(DRAGLISTMSGSTRINGW);
-
- return SetWindowSubclass(hwndLB, DragList_SubclassWindowProc, DRAGLIST_SUBCLASSID, (DWORD_PTR)data);
-}
-
-/***********************************************************************
- * DrawInsert (COMCTL32.15)
- *
- * Draws insert arrow by the side of the ListBox item in the parent window.
- *
- * RETURNS
- * Nothing.
- */
-VOID WINAPI DrawInsert (HWND hwndParent, HWND hwndLB, INT nItem)
-{
- RECT rcItem, rcListBox, rcDragIcon;
- HDC hdc;
- DRAGLISTDATA * data;
-
- TRACE("(%p %p %d)\n", hwndParent, hwndLB, nItem);
-
- if (!hDragArrow)
- hDragArrow = LoadIconW(COMCTL32_hModule, (LPCWSTR)IDI_DRAGARROW);
-
- if (LB_ERR == SendMessageW(hwndLB, LB_GETITEMRECT, nItem, (LPARAM)&rcItem))
- return;
-
- if (!GetWindowRect(hwndLB, &rcListBox))
- return;
-
- /* convert item rect to parent co-ordinates */
- if (!MapWindowPoints(hwndLB, hwndParent, (LPPOINT)&rcItem, 2))
- return;
-
- /* convert list box rect to parent co-ordinates */
- if (!MapWindowPoints(HWND_DESKTOP, hwndParent, (LPPOINT)&rcListBox, 2))
- return;
-
- rcDragIcon.left = rcListBox.left - DRAGICON_HOTSPOT_X;
- rcDragIcon.top = rcItem.top - DRAGICON_HOTSPOT_Y;
- rcDragIcon.right = rcListBox.left;
- rcDragIcon.bottom = rcDragIcon.top + DRAGICON_HEIGHT;
-
- if (!GetWindowSubclass(hwndLB, DragList_SubclassWindowProc, DRAGLIST_SUBCLASSID, (DWORD_PTR*)&data))
- return;
-
- if (nItem < 0)
- SetRectEmpty(&rcDragIcon);
-
- /* prevent flicker by only redrawing when necessary */
- if (!EqualRect(&rcDragIcon, &data->last_drag_icon_rect))
- {
- /* get rid of any previous inserts drawn */
- RedrawWindow(hwndParent, &data->last_drag_icon_rect, NULL,
- RDW_INTERNALPAINT | RDW_ERASE | RDW_INVALIDATE | RDW_UPDATENOW);
-
- data->last_drag_icon_rect = rcDragIcon;
-
- if (nItem >= 0)
- {
- hdc = GetDC(hwndParent);
-
- DrawIcon(hdc, rcDragIcon.left, rcDragIcon.top, hDragArrow);
-
- ReleaseDC(hwndParent, hdc);
- }
- }
-}
-
-/***********************************************************************
- * LBItemFromPt (COMCTL32.14)
- *
- * Gets the index of the ListBox item under the specified point,
- * scrolling if bAutoScroll is TRUE and pt is outside of the ListBox.
- *
- * RETURNS
- * The ListBox item ID if pt is over a list item or -1 otherwise.
- */
-INT WINAPI LBItemFromPt (HWND hwndLB, POINT pt, BOOL bAutoScroll)
-{
- RECT rcClient;
- INT nIndex;
- DWORD dwScrollTime;
-
- TRACE("(%p %d x %d %s)\n",
- hwndLB, pt.x, pt.y, bAutoScroll ? "TRUE" : "FALSE");
-
- ScreenToClient (hwndLB, &pt);
- GetClientRect (hwndLB, &rcClient);
- nIndex = (INT)SendMessageW (hwndLB, LB_GETTOPINDEX, 0, 0);
-
- if (PtInRect (&rcClient, pt))
- {
- /* point is inside -- get the item index */
- while (TRUE)
- {
- if (SendMessageW (hwndLB, LB_GETITEMRECT, nIndex, (LPARAM)&rcClient) == LB_ERR)
- return -1;
-
- if (PtInRect (&rcClient, pt))
- return nIndex;
-
- nIndex++;
- }
- }
- else
- {
- /* point is outside */
- if (!bAutoScroll)
- return -1;
-
- if ((pt.x > rcClient.right) || (pt.x < rcClient.left))
- return -1;
-
- if (pt.y < 0)
- nIndex--;
- else
- nIndex++;
-
- dwScrollTime = GetTickCount ();
-
- if ((dwScrollTime - dwLastScrollTime) < DRAGLIST_SCROLLPERIOD)
- return -1;
-
- dwLastScrollTime = dwScrollTime;
-
- SendMessageW (hwndLB, LB_SETTOPINDEX, nIndex, 0);
- }
-
- return -1;
-}
projects / reactos.git / blobdiff