C++ COptItem_TreeCtrl::GetSelectedItemID方法代码示例

bool CMsgTree::DeleteSelectedItem() // returns true if the item was deleted
{
	COptItem_TreeCtrl *TreeCtrl = GetTreeCtrl();
	int Order = TreeCtrl->IDToOrder(TreeCtrl->GetSelectedItemID(GetParent(hTreeView)));
	_ASSERT(Order >= 0);
	CTreeItem *SelectedItem = &TreeCtrl->Value[Order];

	//NightFox: fix for langpack and fix cut char space in text
	if (MessageBox(GetParent(hTreeView),
		((SelectedItem->Flags & TIF_GROUP) ?
			TranslateT("Do you really want to delete this category with its messages?") :
			TranslateT("Do you really want to delete this message?")),
		TranslateT("New Away System"), MB_ICONQUESTION | MB_YESNO | MB_DEFBUTTON2) == IDYES) {
		NMMSGTREE nm = { 0 };
		nm.ItemOld = SelectedItem;
		nm.hdr.code = MTN_DELETEITEM;
		nm.hdr.hwndFrom = hTreeView;
		nm.hdr.idFrom = GetDlgCtrlID(hTreeView);
		if (!SendMessage(GetParent(hTreeView), WM_NOTIFY, 0, (LPARAM)&nm)) {
			TreeCtrl->Delete(GetParent(hTreeView), TreeCtrl->GetSelectedItemID(GetParent(hTreeView)));
			return true;
		}
	}
	return false;
}

CBaseTreeItem* CMsgTree::GetSelection() // returns NULL if there's nothing selected
{
	COptItem_TreeCtrl *TreeCtrl = GetTreeCtrl();
	int Order = TreeCtrl->IDToOrder(TreeCtrl->GetSelectedItemID(GetParent(hTreeView)));
	if (Order == -1)
		return NULL;
	return (Order <= TREECTRL_ROOTORDEROFFS) ? (CBaseTreeItem*)&TreeCtrl->RootItems[ROOT_ORDER_TO_INDEX(Order)] : (CBaseTreeItem*)&TreeCtrl->Value[Order];
}

static LRESULT CALLBACK MsgTreeSubclassProc(HWND hWnd, UINT Msg, WPARAM wParam, LPARAM lParam)
{
	CMsgTree *dat = CWndUserData(GetParent(hWnd)).GetMsgTree();
	switch (Msg) {
	case UM_MSGTREE_UPDATE: // returns TRUE if updated
		{
			bool Modified = dat->MsgTreePage.GetModified();
			TCString WndTitle;
			if (Modified) {
				WndTitle.GetBuffer(256);
				HWND hCurWnd = hWnd;
				do {
					hCurWnd = GetParent(hCurWnd);
				} while (hCurWnd && !GetWindowText(hCurWnd, WndTitle, 256));
				WndTitle.ReleaseBuffer();
			}
			if (!Modified || MessageBox(GetParent(hWnd), TCString(TranslateT("You've made changes to multiple message trees at a time.\r\nDo you want to leave changes in \"")) + WndTitle + TranslateT("\" dialog?\r\nPress Yes to leave changes in this dialog, or No to discard its changes and save changes of the other message tree instead."), WndTitle + _T(" - ") + TranslateT("New Away System"), MB_ICONQUESTION | MB_YESNO) == IDNO) {
				COptItem_TreeCtrl *TreeCtrl = dat->GetTreeCtrl();
				TCString OldTitle, OldMsg, NewTitle, NewMsg;
				int OldOrder = TreeCtrl->IDToOrder(TreeCtrl->GetSelectedItemID(GetParent(hWnd)));
				if (OldOrder != -1) {
					CBaseTreeItem* ItemOld = (OldOrder <= TREECTRL_ROOTORDEROFFS) ? (CBaseTreeItem*)&TreeCtrl->RootItems[ROOT_ORDER_TO_INDEX(OldOrder)] : (CBaseTreeItem*)&TreeCtrl->Value[OldOrder];
					OldTitle = ItemOld->Title;
					if (!(ItemOld->Flags & TIF_ROOTITEM))
						OldMsg = ((CTreeItem*)ItemOld)->User_Str1;
				}
				dat->UpdateLock++;
				dat->MsgTreePage.DBToMemToPage();
				dat->UpdateLock--;
				NMMSGTREE nm = { 0 };
				int Order = TreeCtrl->IDToOrder(TreeCtrl->GetSelectedItemID(GetParent(hWnd)));
				if (Order != -1) {
					nm.ItemNew = (Order <= TREECTRL_ROOTORDEROFFS) ? (CBaseTreeItem*)&TreeCtrl->RootItems[ROOT_ORDER_TO_INDEX(Order)] : (CBaseTreeItem*)&TreeCtrl->Value[Order];
					NewTitle = nm.ItemNew->Title;
					if (!(nm.ItemNew->Flags & TIF_ROOTITEM))
						NewMsg = ((CTreeItem*)nm.ItemNew)->User_Str1;
				}
				if (OldTitle.IsEmpty())
					OldTitle = _T(""); // to be sure that NULL will be equal to "" in the latter comparisons
				if (OldMsg.IsEmpty())
					OldMsg = _T("");
				if (NewTitle.IsEmpty())
					NewTitle = _T("");
				if (NewMsg.IsEmpty())
					NewMsg = _T("");

				if (OldTitle != (const TCHAR*)NewTitle || OldMsg != (const TCHAR*)NewMsg) {
					// probably it's better to leave nm.ItemOld = NULL, to prevent accidental rewriting of it with old data from an edit control etc.
					nm.hdr.code = MTN_SELCHANGED;
					nm.hdr.hwndFrom = hWnd;
					nm.hdr.idFrom = GetDlgCtrlID(hWnd);
					SendMessage(GetParent(hWnd), WM_NOTIFY, 0, (LPARAM)&nm);
				}
				return true;
			}
		}
		return false;

	case WM_KEYDOWN:
		switch (wParam) {
		case VK_DELETE:
			dat->DeleteSelectedItem();
			break;
		case VK_INSERT:
			dat->AddMessage();
			break;
		}
		break;

	case WM_RBUTTONDOWN:
		SetFocus(hWnd);
		{
			TVHITTESTINFO hitTest;
			hitTest.pt.x = (short)LOWORD(lParam);
			hitTest.pt.y = (short)HIWORD(lParam);
			TreeView_HitTest(hWnd, &hitTest);
			if (hitTest.hItem && hitTest.flags & TVHT_ONITEM)
				TreeView_SelectItem(hWnd, hitTest.hItem);

			return DefWindowProc(hWnd, Msg, wParam, lParam);
		}
		break;

	case WM_CONTEXTMENU:
		{
			TVHITTESTINFO ht;
			ht.pt.x = GET_X_LPARAM(lParam);
			ht.pt.y = GET_Y_LPARAM(lParam);
			TVITEM tvi = { 0 };
			if (ht.pt.x == -1 && ht.pt.y == -1) { // use selected item 
				if (tvi.hItem = TreeView_GetSelection(hWnd)) {
					TreeView_EnsureVisible(hWnd, tvi.hItem);
					RECT rc;
					TreeView_GetItemRect(hWnd, tvi.hItem, &rc, true);
					ht.pt.x = rc.left;
					ht.pt.y = rc.bottom;
				}
			}
			else {
				ScreenToClient(hWnd, &ht.pt);
//.........这里部分代码省略.........