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458 lines
11 KiB
458 lines
11 KiB
/**********************************************************************/
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/** Microsoft Windows **/
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/** Copyright(c) Microsoft Corp., 1991, 1992 **/
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/**********************************************************************/
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/*
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* MODULE NAME: DDLIST.C
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*
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* AUTHOR: Vlad Sadovsky
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* Microsoft Corp.
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*
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* SHORT DESCRIPTION: Support for owner drawn dual-list in dialogs
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*
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* EXPORTED FUNCTIONS:
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*
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* FUNCTIONS:
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*
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*
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*
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* FILE HISTORY:
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*
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* vlads 05-09-92 Create.
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* georgep 05-21-92 Modify for Toolbar Customization.
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*
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\**********************************************************************/
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#include "ctlspriv.h"
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extern TCHAR szNull[];
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static HCURSOR hCurStop = NULL;
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static HCURSOR hCurCopy = NULL;
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static HCURSOR hCurMove = NULL;
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#define GWL_PDRAGPROP 0
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#define DF_ACTUALLYDRAG 0x0001
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#define DF_DEFERRED 0x0002
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#define INITLINESPERSECOND 6
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#define VERTCHANGENUMLINES 25
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#define TIMERID 238
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#define TIMERLEN 50
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#define DX_INSERT 16
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#define DY_INSERT 16
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typedef struct {
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WNDPROC lpfnDefProc;
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HWND hwndDrag;
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UINT uFlags;
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} DRAGPROP, *PDRAGPROP;
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UINT uDragListMsg = 0L;
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TCHAR szDragListMsgString[] = DRAGLISTMSGSTRING;
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static TCHAR szDragProp[] = TEXT("DragProp");
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Static BOOL
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PtInLBItem(HWND hLB, INT nItem, POINT pt,
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INT xInflate, INT yInflate)
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{
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RECT rc;
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if (nItem < 0)
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nItem = (int)SendMessage(hLB, LB_GETCURSEL, 0, 0L);
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if (SendMessage(hLB, LB_GETITEMRECT, nItem, (LPARAM)(LPRECT)&rc) == LB_ERR)
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return(FALSE);
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InflateRect(&rc, xInflate, yInflate);
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return(PtInRect(&rc, pt));
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}
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/*
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* DragListSubclassProc
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* --------------------
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*
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* Window procedure for subclassed list boxes
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*/
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LRESULT CALLBACK
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DragListSubclassProc(HWND hLB, UINT uMsg, WPARAM wParam, LPARAM lParam)
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{
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PDRAGPROP pDragProp;
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DRAGLISTINFO sNotify;
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WNDPROC lpfnDefProc;
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BOOL bDragging;
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pDragProp = (PDRAGPROP)GetProp(hLB, szDragProp);
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bDragging = pDragProp->hwndDrag == hLB;
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// Save this in case anything happens to pDragProp before we return.
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lpfnDefProc = pDragProp->lpfnDefProc;
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switch (uMsg) {
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case WM_DESTROY:
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if (bDragging)
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SendMessage(hLB, WM_RBUTTONDOWN, 0, 0L); // cancel drag
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// Restore the window proc just in case.
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SetWindowLong(hLB, GWL_WNDPROC, (LONG)lpfnDefProc);
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if (pDragProp) {
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LocalFree((HLOCAL)pDragProp);
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RemoveProp(hLB, szDragProp);
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}
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break;
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case WM_LBUTTONDOWN:
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{
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POINT pt;
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int nItem;
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if (bDragging) // nested button-down
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SendMessage(hLB, WM_RBUTTONDOWN, 0, 0L); // cancel drag
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SetFocus(hLB);
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LONG2POINT(lParam,pt);
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ClientToScreen(hLB, &pt);
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nItem = LBItemFromPt(hLB, pt, FALSE);
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if (nItem >= 0) {
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// andrewbe
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if (nItem != SendMessage(hLB, LB_GETCURSEL, 0, 0L)) {
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SendMessage(hLB, LB_SETCURSEL, nItem, 0L);
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if (GetWindowLong(hLB, GWL_STYLE) & LBS_NOTIFY)
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SendMessage(GetParent(hLB), WM_COMMAND,
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GET_WM_COMMAND_MPS(GetDlgCtrlID(hLB),hLB, LBN_SELCHANGE));
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}
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sNotify.uNotification = DL_BEGINDRAG;
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goto QueryParent;
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} else
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goto FakeDrag;
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}
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case WM_TIMER:
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if (wParam != TIMERID)
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break;
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// andrewbe -- Fixed attempt to squeeze 64 bits into lParam
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{
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POINT CursorPos;
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GetCursorPos(&CursorPos);
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ScreenToClient(hLB, &CursorPos);
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lParam = MAKELPARAM((WORD)CursorPos.x, (WORD)CursorPos.y);
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}
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// Fall through
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case WM_MOUSEMOVE:
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if (bDragging) {
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HWND hwndParent;
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DWORD dwRet;
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// We may be just simulating a drag, but not actually doing
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// anything.
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if (!(pDragProp->uFlags&DF_ACTUALLYDRAG))
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return(0L);
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// We don't want to do any dragging until the user has dragged
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// outside of the current selection.
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if (pDragProp->uFlags & DF_DEFERRED) {
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POINT pt;
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LONG2POINT(lParam,pt);
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if (PtInLBItem(hLB, -1, pt, 0, 4))
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return(0L);
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pDragProp->uFlags &= ~DF_DEFERRED;
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}
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sNotify.uNotification = DL_DRAGGING;
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QueryParent:
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hwndParent = GetParent(hLB);
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sNotify.hWnd = hLB;
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LONG2POINT(lParam,sNotify.ptCursor);
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ClientToScreen(hLB, &sNotify.ptCursor);
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dwRet = SendMessage(hwndParent, uDragListMsg, GetDlgCtrlID(hLB),
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(LPARAM)(LPDRAGLISTINFO)&sNotify);
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if (uMsg == WM_LBUTTONDOWN) {
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// Some things may not be draggable
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if (dwRet) {
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SetTimer(hLB, TIMERID, TIMERLEN, NULL);
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pDragProp->uFlags = DF_DEFERRED | DF_ACTUALLYDRAG;
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} else {
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FakeDrag:
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pDragProp->uFlags = 0;
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}
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// Set capture and change mouse cursor
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pDragProp->hwndDrag = hLB;
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SetCapture(hLB);
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} else {
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switch (dwRet) {
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case DL_STOPCURSOR:
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SetCursor(hCurStop);
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break;
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case DL_COPYCURSOR:
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SetCursor(hCurCopy);
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break;
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case DL_MOVECURSOR:
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SetCursor(hCurMove);
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break;
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default:
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break;
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}
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}
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// Don't call the def proc, since it may try to change the
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// selection or set timers or things like that.
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return(0L);
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}
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break;
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case WM_RBUTTONDOWN:
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case WM_LBUTTONUP:
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// if we are capturing mouse - release it and check for acceptable place
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// where mouse is now to decide drop or not
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if (bDragging) {
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HWND hwndParent;
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pDragProp->hwndDrag = NULL;
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KillTimer(hLB, TIMERID);
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ReleaseCapture();
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SetCursor(LoadCursor(NULL, IDC_ARROW));
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hwndParent = GetParent(hLB);
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sNotify.uNotification = uMsg==WM_LBUTTONUP ? DL_DROPPED : DL_CANCELDRAG;
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sNotify.hWnd = hLB;
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LONG2POINT(lParam,sNotify.ptCursor);
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ClientToScreen(hLB, &sNotify.ptCursor);
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SendMessage (hwndParent, uDragListMsg, GetDlgCtrlID(hLB),
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(LPARAM)(LPDRAGLISTINFO)&sNotify);
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// We need to make sure to return 0 in case this is from a
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// keyboard message.
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return(0L);
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}
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break;
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case WM_GETDLGCODE:
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if (bDragging)
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return(CallWindowProc(lpfnDefProc, hLB, uMsg, wParam, lParam)
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| DLGC_WANTMESSAGE);
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break;
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case WM_KEYDOWN:
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if (wParam == VK_ESCAPE)
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SendMessage(hLB, WM_RBUTTONDOWN, 0, 0L);
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case WM_CHAR:
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case WM_KEYUP:
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// We don't want the listbox processing this if we are dragging.
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if (bDragging)
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return(0L);
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break;
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default:
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break;
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}
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return(CallWindowProc(lpfnDefProc, hLB, uMsg, wParam, lParam));
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}
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BOOL WINAPI
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MakeDragList(HWND hLB)
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{
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PDRAGPROP pDragProp;
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if (!hCurStop)
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hCurStop = LoadCursor(hInst, (LPTSTR) MAKEINTRESOURCE(IDC_STOP));
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if (!hCurCopy)
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hCurCopy = LoadCursor(hInst, (LPTSTR) MAKEINTRESOURCE(IDC_COPY));
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if (!hCurMove)
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hCurMove = LoadCursor(hInst, (LPTSTR) MAKEINTRESOURCE(IDC_MOVE));
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if (!hCurStop || !hCurCopy || !hCurMove)
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return(FALSE);
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if (!uDragListMsg) {
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uDragListMsg = RegisterWindowMessage(szDragListMsgString);
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if (!uDragListMsg)
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return(FALSE);
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}
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// Check that we have not already subclassed this window.
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if (GetProp(hLB, szDragProp))
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return(TRUE);
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pDragProp = (PDRAGPROP)LocalAlloc(LPTR, sizeof(DRAGPROP));
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if (!pDragProp)
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return(FALSE);
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SetProp(hLB, szDragProp, (HANDLE)pDragProp);
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pDragProp->lpfnDefProc = (WNDPROC)SetWindowLong(hLB, GWL_WNDPROC,
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(LONG)DragListSubclassProc);
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return(TRUE);
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}
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INT WINAPI
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LBItemFromPt(HWND hLB, POINT pt, BOOL bAutoScroll)
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{
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static LONG dwLastScroll = 0;
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RECT rc;
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DWORD dwNow;
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INT nItem;
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WORD wScrollDelay, wActualDelay;
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ScreenToClient(hLB, &pt);
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GetClientRect(hLB, &rc);
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nItem = (INT)SendMessage(hLB, LB_GETTOPINDEX, 0, 0L);
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// Is the point in the LB client area?
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if (PtInRect(&rc, pt)) {
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// Check each visible item in turn.
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for ( ; ; ++nItem) {
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if (SendMessage(hLB, LB_GETITEMRECT, nItem, (LPARAM)(LPRECT)&rc)
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== LB_ERR)
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break;
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if (PtInRect(&rc, pt))
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return(nItem);
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}
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} else {
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// If we want autoscroll and the point is directly above or below the
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// LB, determine the direction and if it is time to scroll yet.
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if (bAutoScroll && (UINT)pt.x < (UINT)rc.right) {
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if (pt.y <= 0)
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--nItem;
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else {
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++nItem;
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pt.y = rc.bottom - pt.y;
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}
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wScrollDelay = (WORD)(1000 /
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(INITLINESPERSECOND - pt.y / VERTCHANGENUMLINES));
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dwNow = GetTickCount();
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wActualDelay = (WORD)(dwNow - dwLastScroll);
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if (wActualDelay > wScrollDelay) {
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// This will the actual number of scrolls per second to be
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// much closer to the required number.
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if (wActualDelay > wScrollDelay*2)
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dwLastScroll = dwNow;
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else
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dwLastScroll += wScrollDelay;
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SendMessage(hLB, LB_SETTOPINDEX, nItem, 0L);
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}
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}
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}
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return(-1);
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}
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VOID WINAPI
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DrawInsert(HWND hwndParent, HWND hLB, int nItem)
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{
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static POINT ptLastInsert;
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static INT nLastInsert = -1;
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RECT rc;
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// Erase the old mark if necessary
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if (nLastInsert >= 0 && nItem != nLastInsert) {
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rc.left = ptLastInsert.x;
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rc.top = ptLastInsert.y;
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rc.right = rc.left + DX_INSERT;
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rc.bottom = rc.top + DY_INSERT;
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// Need to update immediately in case the insert rects overlap.
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InvalidateRect(hwndParent, &rc, TRUE);
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UpdateWindow(hwndParent);
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nLastInsert = -1;
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}
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// Draw a new mark if necessary
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if (nItem != nLastInsert && nItem >= 0) {
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static HICON hInsert = NULL;
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if (!hInsert)
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hInsert = LoadIcon(hInst, (LPTSTR) MAKEINTRESOURCE(IDI_INSERT));
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if (hInsert) {
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HDC hDC;
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GetWindowRect(hLB, &rc);
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ScreenToClient(hLB, (LPPOINT)&rc);
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ptLastInsert.x = rc.left - DX_INSERT;
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SendMessage(hLB, LB_GETITEMRECT, nItem, (LPARAM)(LPRECT)&rc);
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ptLastInsert.y = rc.top - DY_INSERT / 2;
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nLastInsert = nItem;
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ClientToScreen(hLB, &ptLastInsert);
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ScreenToClient(hwndParent, &ptLastInsert);
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hDC = GetDC(hwndParent);
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DrawIcon(hDC, ptLastInsert.x, ptLastInsert.y, hInsert);
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ReleaseDC(hwndParent, hDC);
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}
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}
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}
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