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380 lines
9.1 KiB
380 lines
9.1 KiB
//+-------------------------------------------------------------------------
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//
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// Microsoft Windows
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//
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// Copyright (C) Microsoft Corporation, 1999 - 1999
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//
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// File: trobimpl.cpp
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//
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//--------------------------------------------------------------------------
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// trobimpl.cpp : implementation file
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//
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#include "stdafx.h"
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#include "amc.h"
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#include "trobimpl.h"
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/////////////////////////////////////////////////////////////////////////////
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// CTreeObserverTreeImpl
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CTreeObserverTreeImpl::CTreeObserverTreeImpl() :
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m_pTreeSrc(NULL), m_dwStyle(0), m_tidRoot(NULL)
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{
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}
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CTreeObserverTreeImpl::~CTreeObserverTreeImpl()
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{
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}
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HRESULT CTreeObserverTreeImpl::SetStyle(DWORD dwStyle)
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{
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ASSERT((dwStyle & ~(TOBSRV_HIDEROOT | TOBSRV_FOLDERSONLY)) == 0);
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m_dwStyle = dwStyle;
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return S_OK;
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}
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HRESULT CTreeObserverTreeImpl::SetTreeSource(CTreeSource* pTreeSrc)
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{
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// Window may be gone before source is disconnected
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if (IsWindow(m_hWnd))
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DeleteAllItems();
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m_pTreeSrc = pTreeSrc;
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if (pTreeSrc == NULL)
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return S_OK;
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// Must have window before populating tree
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ASSERT(IsWindow(m_hWnd));
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// populate top level of tree
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TREEITEMID tidRoot = m_pTreeSrc->GetRootItem();
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if (tidRoot != NULL)
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{
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// Trigger handler as though item were just added
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ItemAdded(tidRoot);
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}
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return S_OK;
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}
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TREEITEMID CTreeObserverTreeImpl::GetSelection()
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{
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HTREEITEM hti = GetSelectedItem();
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if (hti)
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return static_cast<TREEITEMID>(GetItemData(hti));
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else
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return NULL;
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}
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void CTreeObserverTreeImpl::SetSelection(TREEITEMID tid)
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{
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ASSERT(m_pTreeSrc != NULL);
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HTREEITEM hti = FindHTI(tid, TRUE);
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ASSERT(hti != NULL);
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SelectItem(hti);
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EnsureVisible(hti);
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}
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void CTreeObserverTreeImpl::ExpandItem(TREEITEMID tid)
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{
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ASSERT(m_pTreeSrc != NULL);
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HTREEITEM hti = FindHTI(tid, TRUE);
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if (hti != NULL)
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Expand(hti, TVE_EXPAND);
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}
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BOOL CTreeObserverTreeImpl::IsItemExpanded(TREEITEMID tid)
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{
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ASSERT(m_pTreeSrc != NULL);
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HTREEITEM hti = FindHTI(tid, TRUE);
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return (IsItemExpanded(hti));
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}
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HTREEITEM CTreeObserverTreeImpl::FindChildHTI(HTREEITEM htiParent, TREEITEMID tid)
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{
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HTREEITEM htiTemp;
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if (htiParent == TVI_ROOT)
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htiTemp = GetRootItem();
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else
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htiTemp = GetChildItem(htiParent);
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while (htiTemp && GetItemData(htiTemp) != tid)
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{
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htiTemp = GetNextSiblingItem(htiTemp);
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}
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return htiTemp;
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}
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HTREEITEM CTreeObserverTreeImpl::FindHTI(TREEITEMID tid, BOOL bAutoExpand)
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{
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ASSERT(m_pTreeSrc != NULL);
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if (tid == NULL || (tid == m_tidRoot && RootHidden()))
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return TVI_ROOT;
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HTREEITEM htiParent = FindHTI(m_pTreeSrc->GetParentItem(tid), bAutoExpand);
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if (htiParent == NULL)
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return NULL;
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if (bAutoExpand && !WasItemExpanded(htiParent))
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Expand(htiParent, TVE_EXPAND);
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return FindChildHTI(htiParent, tid);
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}
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HTREEITEM CTreeObserverTreeImpl::AddOneItem(HTREEITEM htiParent, HTREEITEM htiAfter, TREEITEMID tid)
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{
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ASSERT(m_pTreeSrc != NULL);
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TVINSERTSTRUCT insert;
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insert.hParent = htiParent;
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insert.hInsertAfter = htiAfter;
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insert.item.mask = TVIF_PARAM | TVIF_TEXT | TVIF_CHILDREN | TVIF_IMAGE | TVIF_SELECTEDIMAGE;
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insert.item.lParam = tid;
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insert.item.iImage = m_pTreeSrc->GetItemImage(tid);
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insert.item.iSelectedImage = insert.item.iImage;
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insert.item.cChildren = m_pTreeSrc->GetChildItem(tid) ? 1 : 0;
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TCHAR name[MAX_PATH];
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m_pTreeSrc->GetItemName(tid, name, countof(name));
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insert.item.pszText = name;
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return InsertItem(&insert);
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}
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void CTreeObserverTreeImpl::AddChildren(HTREEITEM hti)
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{
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ASSERT(m_pTreeSrc != NULL);
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TREEITEMID tidChild;
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// if adding top level item
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if (hti == TVI_ROOT)
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{
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if (RootHidden())
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{
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// if root is hidden, add its children
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ASSERT(m_tidRoot != 0);
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tidChild = m_pTreeSrc->GetChildItem(m_tidRoot);
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}
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else
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{
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// else add root item itself
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tidChild = m_pTreeSrc->GetRootItem();
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}
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}
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else
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{
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// convert to TID, then get its child
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TREEITEMID tid = static_cast<TREEITEMID>(GetItemData(hti));
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ASSERT(tid != 0);
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tidChild = m_pTreeSrc->GetChildItem(tid);
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}
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while (tidChild)
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{
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// Add visible items
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if (!ShowFoldersOnly() || m_pTreeSrc->IsFolderItem(tidChild))
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AddOneItem(hti, TVI_LAST, tidChild);
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tidChild = m_pTreeSrc->GetNextSiblingItem(tidChild);
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}
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}
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void CTreeObserverTreeImpl::ItemAdded(TREEITEMID tid)
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{
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ASSERT(m_pTreeSrc != NULL);
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ASSERT(tid != 0);
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// if only folders visible, skip this item
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if (ShowFoldersOnly() && !m_pTreeSrc->IsFolderItem(tid))
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return;
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// Get parent tree item
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TREEITEMID tidParent = m_pTreeSrc->GetParentItem(tid);
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// if this is the tree root and the root is not displayed
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if (tidParent == NULL && RootHidden())
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{
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// Can only have one hidden root
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ASSERT(m_tidRoot == NULL);
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// Just save TID as the hidden root and return
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m_tidRoot = tid;
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// since root is hidden, add its children to the tree
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AddChildren(TVI_ROOT);
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return;
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}
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// Add new item to tree
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HTREEITEM htiParent = FindHTI(tidParent);
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// Parent exists and has been expanded
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if (WasItemExpanded(htiParent))
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{
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// Determine previous tree item
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// Because the source doesn't support GetPrevSibling
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// we have to get the next TID then use our own tree to
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// back up to the previous item
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//
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HTREEITEM htiPrev;
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TREEITEMID tidNext = m_pTreeSrc->GetNextSiblingItem(tid);
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if (tidNext)
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{
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HTREEITEM htiNext = FindChildHTI(htiParent, tidNext);
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ASSERT(htiNext);
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htiPrev = GetPrevSiblingItem(htiNext);
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if (htiPrev == NULL)
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htiPrev = TVI_FIRST;
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}
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else
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{
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htiPrev = TVI_LAST;
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}
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// Insert the new tree item
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AddOneItem(htiParent, htiPrev, tid);
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}
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else if (htiParent)
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{
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// Set child count so parent can expand
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TV_ITEM item;
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item.mask = TVIF_CHILDREN;
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item.hItem = htiParent;
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item.cChildren = 1;
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SetItem(&item);
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}
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}
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void CTreeObserverTreeImpl::ItemRemoved(TREEITEMID tidParent, TREEITEMID tid)
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{
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ASSERT(m_pTreeSrc != NULL);
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ASSERT(tid != 0);
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// if deleting hidden root, clear tree and return
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if (tid == m_tidRoot)
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{
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DeleteAllItems();
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m_tidRoot = NULL;
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return;
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}
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// Get parent tree item
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HTREEITEM htiParent = FindHTI(tidParent);
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if (WasItemExpanded(htiParent))
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{
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// Find removed item
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HTREEITEM hti = FindChildHTI(htiParent, tid);
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// Remove the item
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DeleteItem(hti);
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}
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}
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void CTreeObserverTreeImpl::ItemChanged(TREEITEMID tid, DWORD dwAttrib)
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{
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ASSERT(m_pTreeSrc != NULL);
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ASSERT(tid != 0);
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if (dwAttrib & TIA_NAME)
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{
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// Get changed tree item
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HTREEITEM hti = FindHTI(tid);
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// Force item update
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if (hti != 0)
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{
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TCHAR name[MAX_PATH];
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m_pTreeSrc->GetItemName(tid, name, countof(name));
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TVITEM item;
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item.hItem = hti;
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item.mask = TVIF_TEXT;
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item.pszText = name;
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SetItem(&item);
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}
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}
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}
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void CTreeObserverTreeImpl::OnItemExpanding(NMHDR* pNMHDR, LRESULT* pResult)
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{
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NM_TREEVIEW* pNotify = (NM_TREEVIEW*)pNMHDR;
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ASSERT(pNotify != NULL);
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HTREEITEM hti = pNotify->itemNew.hItem;
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ASSERT(hti != NULL);
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// Enumerate the folders below this item
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if (pNotify->action == TVE_EXPAND)
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{
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// Only add children on first expansion
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if (!(pNotify->itemNew.state & TVIS_EXPANDEDONCE))
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AddChildren(hti);
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}
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// Flip state of icon open/closed
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ASSERT(m_pTreeSrc != NULL);
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TREEITEMID tid = pNotify->itemNew.lParam;
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ASSERT(m_pTreeSrc->IsFolderItem(tid));
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int iImage = (pNotify->action == TVE_EXPAND) ?
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m_pTreeSrc->GetItemOpenImage(tid) : m_pTreeSrc->GetItemImage(tid);
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TVITEM item;
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item.hItem = hti;
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item.mask = TVIF_IMAGE | TVIF_SELECTEDIMAGE;
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item.iImage = item.iSelectedImage = iImage;
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SetItem(&item);
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*pResult = 0;
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}
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void CTreeObserverTreeImpl::OnSingleExpand(NMHDR* pNMHDR, LRESULT* pResult)
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{
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*pResult = TVNRET_DEFAULT;
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}
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BEGIN_MESSAGE_MAP(CTreeObserverTreeImpl, CTreeCtrl)
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ON_NOTIFY_REFLECT(TVN_SINGLEEXPAND, OnSingleExpand)
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ON_NOTIFY_REFLECT(TVN_ITEMEXPANDING, OnItemExpanding)
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END_MESSAGE_MAP()
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/////////////////////////////////////////////////////////////////////////////
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// CFavoritesView message handlers
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