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MyTreeView.cpp
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// WinDjView
// Copyright (C) 2004-2015 Andrew Zhezherun
//
// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation; either version 2 of the License, or
// (at your option) any later version.
//
// This program 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 General Public License for more details.
//
// You should have received a copy of the GNU General Public License along
// with this program; if not, write to the Free Software Foundation, Inc.,
// 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
// http://www.gnu.org/copyleft/gpl.html
#include "stdafx.h"
#include "WinDjView.h"
#include "MyTreeView.h"
#include "Drawing.h"
#ifdef _DEBUG
#define new DEBUG_NEW
#endif
int s_nOffsetLeft = 3;
int s_nTextOffset = 5;
int s_nOffsetRight = 2;
static HCURSOR hCursorLink = NULL;
// CMyTreeView control
IMPLEMENT_DYNAMIC(CMyTreeView, CMyScrollView)
CMyTreeView::CMyTreeView()
: m_nItemHeight(20), m_pImageList(NULL), m_bWrapLabels(true), m_hTheme(NULL),
m_pSelection(NULL), m_pHoverNode(NULL), m_szDisplay(0, 0),
m_bMouseInTooltip(false), m_bRedirectWheel(true), m_bLinesAtRoot(false),
m_bHasLines(false), m_bHasGlyphs(false), m_bBatchUpdate(false),
m_bInsideOnSize(false)
{
m_pRoot = new TreeNode(NULL, -1, -1, NULL);
m_pRoot->bCollapsed = false;
CreateSystemIconFont(m_font);
LOGFONT lf;
m_font.GetLogFont(&lf);
lf.lfUnderline = true;
m_fontHover.CreateFontIndirect(&lf);
}
CMyTreeView::~CMyTreeView()
{
delete m_pRoot;
}
CMyTreeView::TreeNode::~TreeNode()
{
TreeNode* pNode = pChild;
while (pNode != NULL)
{
TreeNode* pNext = pNode->pNext;
delete pNode;
pNode = pNext;
}
}
BEGIN_MESSAGE_MAP(CMyTreeView, CMyScrollView)
ON_WM_CREATE()
ON_WM_DESTROY()
ON_WM_SIZE()
ON_WM_ERASEBKGND()
ON_MESSAGE_VOID(WM_THEMECHANGED, OnThemeChanged)
ON_WM_LBUTTONDOWN()
ON_WM_RBUTTONDOWN()
ON_WM_MOUSEMOVE()
ON_WM_SETFOCUS()
ON_WM_KILLFOCUS()
ON_WM_SETCURSOR()
ON_MESSAGE_VOID(WM_MOUSELEAVE, OnMouseLeave)
ON_WM_KEYDOWN()
ON_WM_SYSCOLORCHANGE()
ON_WM_LBUTTONDBLCLK()
ON_WM_STYLECHANGED()
END_MESSAGE_MAP()
// CMyTreeView message handlers
void CMyTreeView::OnDraw(CDC* pDC)
{
CRect rcViewport(CPoint(0, 0), GetViewportSize());
CRect rcClip;
pDC->GetClipBox(rcClip);
rcClip.IntersectRect(CRect(rcClip), rcViewport);
m_offscreenDC.Create(pDC, rcClip.Size());
m_offscreenDC.SetViewportOrg(-rcClip.TopLeft());
m_offscreenDC.IntersectClipRect(rcClip);
CPoint ptScroll = GetScrollPosition();
CFont* pOldFont = m_offscreenDC.SelectObject(&m_font);
COLORREF crBackground = ::GetSysColor(COLOR_WINDOW);
m_offscreenDC.SetBkColor(crBackground);
int nBottom = PaintNode(&m_offscreenDC, m_pRoot, rcClip);
if (nBottom < m_szDisplay.cy)
{
CRect rcBottom(0, nBottom, m_szDisplay.cx, m_szDisplay.cy);
m_offscreenDC.FillSolidRect(rcBottom - ptScroll, crBackground);
}
m_offscreenDC.SelectObject(pOldFont);
pDC->BitBlt(rcClip.left, rcClip.top, rcClip.Width(), rcClip.Height(),
&m_offscreenDC, rcClip.left, rcClip.top, SRCCOPY);
m_offscreenDC.Release();
}
int CMyTreeView::PaintNode(CDC* pDC, TreeNode* pNode, const CRect& rcClip)
{
CPoint ptScroll = GetScrollPosition();
bool bFocus = (GetFocus() == this);
int nBottom = (pNode == m_pRoot ? 0 : pNode->rcNode.bottom);
CRect rcLine(pNode->rcNode);
rcLine.right = m_szDisplay.cx;
CRect rcIntersect;
if (pNode != m_pRoot && rcIntersect.IntersectRect(rcClip, rcLine - ptScroll))
{
COLORREF crBackground = ::GetSysColor(COLOR_WINDOW);
pDC->FillSolidRect(rcLine - ptScroll, crBackground);
CFont* pOldFont = NULL;
if (pNode == m_pHoverNode)
pOldFont = pDC->SelectObject(&m_fontHover);
UINT nFlags = DT_LEFT | DT_NOPREFIX | DT_TOP | (m_bWrapLabels ? DT_WORDBREAK : DT_SINGLELINE);
if (pNode == m_pSelection)
{
CRect rcSel(pNode->rcLabel);
rcSel.DeflateRect(s_nTextOffset - 3, 0, 0, 0);
COLORREF crSel = ::GetSysColor(bFocus ? COLOR_HIGHLIGHT : COLOR_BTNFACE);
pDC->FillSolidRect(rcSel - ptScroll, crSel);
COLORREF crSelText = ::GetSysColor(bFocus ? COLOR_HIGHLIGHTTEXT : COLOR_WINDOWTEXT);
pDC->SetTextColor(crSelText);
pDC->DrawText(pNode->strLabel, pNode->rcText - ptScroll, nFlags);
if (bFocus)
DrawDottedRect(pDC, rcSel - ptScroll, crSelText);
}
else
{
COLORREF crText = ::GetSysColor(pNode == m_pHoverNode ? COLOR_HOTLIGHT : COLOR_WINDOWTEXT);
pDC->SetTextColor(crText);
pDC->DrawText(pNode->strLabel, pNode->rcText - ptScroll, DT_LEFT | DT_NOPREFIX | DT_WORDBREAK);
}
if (pNode == m_pHoverNode)
pDC->SelectObject(pOldFont);
if (m_pImageList != NULL && pNode->nImage != -1)
{
m_pImageList->Draw(pDC, pNode == m_pSelection ? pNode->nSelectedImage : pNode->nImage,
pNode->rcImage.TopLeft() + (-ptScroll), ILD_NORMAL);
}
COLORREF crLines = ::GetSysColor(COLOR_BTNSHADOW);
if (m_hTheme != NULL)
XPGetThemeColor(m_hTheme, TVP_BRANCH, 0, TMT_EDGESHADOWCOLOR, &crLines);
if (m_bHasLines && (pNode->pParent != m_pRoot || m_bLinesAtRoot))
{
// Draw lines
if (m_pRoot->pChild != pNode)
{
// This node is not the first child of the root, so there should be a vertical top half-line here
DrawDottedLine(pDC, CPoint(pNode->nLineX, pNode->rcNode.top) + (-ptScroll),
CPoint(pNode->nLineX, pNode->nLineY) + (-ptScroll), crLines);
}
if (pNode->HasSibling())
{
// This node is not the last child, so there should be a vertical bottom half-line here
DrawDottedLine(pDC, CPoint(pNode->nLineX, pNode->nLineY) + (-ptScroll),
CPoint(pNode->nLineX, pNode->rcNode.bottom) + (-ptScroll), crLines);
}
// Horizontal line
DrawDottedLine(pDC, CPoint(pNode->nLineX, pNode->nLineY) + (-ptScroll),
CPoint(pNode->nLineStopX, pNode->nLineY) + (-ptScroll), crLines);
if (pNode->HasChildren() && !pNode->bCollapsed)
{
// Vertical line to the first child
DrawDottedLine(pDC, CPoint(pNode->pChild->nLineX, pNode->nLineY) + (-ptScroll),
CPoint(pNode->pChild->nLineX, pNode->rcNode.bottom) + (-ptScroll), crLines);
}
TreeNode* pParent = pNode->pParent;
while (pParent != m_pRoot)
{
if (pParent->HasSibling())
{
// This node has a sibling node, so there should be a full vertical line here
DrawDottedLine(pDC, CPoint(pParent->nLineX, pNode->rcNode.top) + (-ptScroll),
CPoint(pParent->nLineX, pNode->rcNode.bottom) + (-ptScroll), crLines);
}
pParent = pParent->pParent;
}
}
if (pNode->HasChildren() && m_bHasGlyphs && (pNode->pParent != m_pRoot || m_bLinesAtRoot))
{
// Draw glyph
if (m_hTheme != NULL)
{
int iGlyph = (pNode->bCollapsed ? GLPS_CLOSED : GLPS_OPENED);
XPDrawThemeBackground(m_hTheme, pDC->m_hDC, TVP_GLYPH, iGlyph, pNode->rcGlyph - ptScroll, NULL);
}
else
{
pDC->FillSolidRect(pNode->rcGlyph - ptScroll, crBackground);
FrameRect(pDC, pNode->rcGlyph - ptScroll, ::GetSysColor(COLOR_BTNSHADOW));
CRect rcHorz(pNode->rcGlyph.left + 2, pNode->rcGlyph.CenterPoint().y,
pNode->rcGlyph.right - 2, pNode->rcGlyph.CenterPoint().y + 1);
pDC->FillSolidRect(rcHorz - ptScroll, RGB(0, 0, 0));
if (pNode->bCollapsed)
{
CRect rcVert(pNode->rcGlyph.CenterPoint().x, pNode->rcGlyph.top + 2,
pNode->rcGlyph.CenterPoint().x + 1, pNode->rcGlyph.bottom - 2);
pDC->FillSolidRect(rcVert - ptScroll, RGB(0, 0, 0));
}
}
}
}
if (pNode->HasChildren() && !pNode->bCollapsed)
{
for (TreeNode* pChild = pNode->pChild; pChild != NULL; pChild = pChild->pNext)
nBottom = PaintNode(pDC, pChild, rcClip);
}
return nBottom;
}
void CMyTreeView::SetItemHeight(int nHeight)
{
m_nItemHeight = nHeight;
RecalcLayout();
}
void CMyTreeView::SetImageList(CImageList* pImageList, DWORD dwStyle)
{
m_pImageList = pImageList;
RecalcLayout();
}
void CMyTreeView::SetWrapLabels(bool bWrapLabels)
{
if (m_bWrapLabels != bWrapLabels)
{
m_bWrapLabels = bWrapLabels;
RecalcLayout();
}
}
void CMyTreeView::SetRedirectWheel(bool bRedirectWheel)
{
m_bRedirectWheel = bRedirectWheel;
}
HTREEITEM CMyTreeView::InsertItem(LPCTSTR pszItem, HTREEITEM hParent, HTREEITEM hInsertAfter)
{
return InsertItem(pszItem, -1, -1, hParent, hInsertAfter);
}
HTREEITEM CMyTreeView::InsertItem(LPCTSTR pszItem, int nImage, int nSelectedImage, HTREEITEM hParent, HTREEITEM hInsertAfter)
{
TreeNode* pParent = (hParent == TVI_ROOT ? m_pRoot : reinterpret_cast<TreeNode*>(hParent));
ASSERT_POINTER(pParent, TreeNode);
TreeNode* pInsertAfter = NULL;
if (hInsertAfter == TVI_LAST)
{
pInsertAfter = pParent->pLastChild;
}
else if (hInsertAfter != TVI_FIRST)
{
pInsertAfter = reinterpret_cast<TreeNode*>(hInsertAfter);
ASSERT_POINTER(pInsertAfter, TreeNode);
ASSERT(pInsertAfter->pParent == pParent);
}
TreeNode* pNode = new TreeNode(pszItem, nImage, nSelectedImage, pParent);
if (pInsertAfter != NULL)
{
pNode->pNext = pInsertAfter->pNext;
pInsertAfter->pNext = pNode;
}
else
{
pNode->pNext = pParent->pChild;
pParent->pChild = pNode;
}
if (pParent->pLastChild == pInsertAfter)
pParent->pLastChild = pNode;
if (!m_bBatchUpdate)
RecalcLayout();
return reinterpret_cast<HTREEITEM>(pNode);
}
bool CMyTreeView::DeleteItem(HTREEITEM hItem)
{
if (hItem == TVI_ROOT)
return false;
TreeNode* pNode = reinterpret_cast<TreeNode*>(hItem);
ASSERT_POINTER(pNode, TreeNode);
while (pNode->pChild != NULL)
{
bool bBatchUpdate = m_bBatchUpdate;
m_bBatchUpdate = true;
DeleteItem(reinterpret_cast<HTREEITEM>(pNode->pChild));
m_bBatchUpdate = bBatchUpdate;
}
TreeNode* pParent = pNode->pParent;
if (pParent->pChild == pNode)
{
pParent->pChild = pNode->pNext;
if (pParent->pLastChild == pNode)
pParent->pLastChild = NULL;
}
else
{
TreeNode* pPrev = pParent->pChild;
while (pPrev != NULL && pPrev->pNext != pNode)
pPrev = pPrev->pNext;
if (pPrev == NULL)
return false;
pPrev->pNext = pNode->pNext;
if (pParent->pLastChild == pNode)
pParent->pLastChild = pPrev;
}
if (m_pSelection == pNode)
m_pSelection = NULL;
NMTREEVIEW nmtv;
InitNotification(nmtv, TVN_DELETEITEM);
nmtv.itemOld.mask = TVIF_HANDLE | TVIF_PARAM;
nmtv.itemOld.hItem = (HTREEITEM) pNode;
nmtv.itemOld.lParam = (LPARAM) pNode->dwUserData;
GetParent()->SendMessage(WM_NOTIFY, GetDlgCtrlID(), (LPARAM) &nmtv);
if (!m_bBatchUpdate)
RecalcLayout();
return true;
}
void CMyTreeView::DeleteAllItems()
{
bool bBatchUpdate = m_bBatchUpdate;
m_bBatchUpdate = true;
while (m_pRoot->pChild != NULL)
DeleteItem(reinterpret_cast<HTREEITEM>(m_pRoot->pChild));
m_bBatchUpdate = bBatchUpdate;
if (!m_bBatchUpdate)
RecalcLayout();
}
void CMyTreeView::InitNotification(NMTREEVIEW& nmtv, UINT nCode)
{
ZeroMemory(&nmtv, sizeof(nmtv));
nmtv.hdr.hwndFrom = GetSafeHwnd();
nmtv.hdr.idFrom = GetDlgCtrlID();
nmtv.hdr.code = nCode;
}
void CMyTreeView::BeginBatchUpdate()
{
m_bBatchUpdate = true;
}
void CMyTreeView::EndBatchUpdate()
{
m_bBatchUpdate = false;
RecalcLayout();
if (m_pSelection != NULL && m_pSelection->nIndex == -1)
SelectNode(NULL);
}
void CMyTreeView::RecalcLayout()
{
CScreenDC dcScreen;
CDC dc;
dc.CreateCompatibleDC(&dcScreen);
CFont* pOldFont = dc.SelectObject(&m_font);
TEXTMETRIC tm;
dc.GetTextMetrics(&tm);
int nFontHeight = tm.tmHeight;
int nTextOffsetTop = max(0, (m_nItemHeight - nFontHeight) / 2);
CSize szGlyph(9, 9);
if (m_hTheme != NULL)
{
CSize sz(9, 9);
XPGetThemePartSize(m_hTheme, dc.m_hDC, TVP_GLYPH, GLPS_CLOSED, NULL, TS_TRUE, &sz);
XPGetThemePartSize(m_hTheme, dc.m_hDC, TVP_GLYPH, GLPS_OPENED, NULL, TS_TRUE, &szGlyph);
szGlyph.cx = max(szGlyph.cx, sz.cx);
szGlyph.cy = max(szGlyph.cy, sz.cy);
}
int nChildOffset = szGlyph.cx + 10;
CSize szViewport = ::GetClientSize(this);
bool bHScroll = false, bVScroll = false;
do
{
int nTop = 0;
int nLevel = 0;
stack<pair<TreeNode*, bool> > s;
s.push(make_pair(m_pRoot, true));
m_items.clear();
m_szDisplay = CSize(0, 0);
while (!s.empty())
{
TreeNode* pNode = s.top().first;
if (pNode != m_pRoot && s.top().second)
{
pNode->nIndex = (int)m_items.size();
m_items.push_back(pNode);
pNode->rcNode.left = s_nOffsetLeft + (nLevel - 1)*nChildOffset;
pNode->rcNode.top = nTop;
pNode->rcNode.bottom = nTop + m_nItemHeight;
bool bHasLine = nLevel > 1 || m_bLinesAtRoot;
if (nLevel > 1 && !m_bLinesAtRoot)
pNode->rcNode.left -= nChildOffset;
pNode->rcText.left = pNode->rcNode.left + (bHasLine ? nChildOffset : 0);
pNode->rcText.top = nTop + nTextOffsetTop;
pNode->rcGlyph.left = pNode->rcNode.left + 4;
pNode->rcGlyph.right = pNode->rcGlyph.left + szGlyph.cx;
pNode->rcGlyph.top = nTop + (m_nItemHeight + 1 - szGlyph.cy) / 2;
pNode->rcGlyph.bottom = pNode->rcGlyph.top + szGlyph.cy;
pNode->nLineX = pNode->rcGlyph.left + szGlyph.cx / 2;
pNode->nLineY = pNode->rcGlyph.top + szGlyph.cy / 2;
pNode->nLineStopX = pNode->rcNode.left + nChildOffset;
if (m_pImageList != NULL && pNode->nImage != -1)
{
int cx = 0, cy = 0;
::ImageList_GetIconSize(m_pImageList->m_hImageList, &cx, &cy);
pNode->rcImage.top = pNode->rcNode.top + (m_nItemHeight - cy) / 2;
pNode->rcImage.bottom = pNode->rcImage.top + cy;
pNode->rcImage.left = pNode->rcText.left;
pNode->rcImage.right = pNode->rcImage.left + cx;
pNode->rcText.left += cx;
}
pNode->rcText.left += s_nTextOffset;
pNode->rcText.right = pNode->rcText.left + 2;
if (!pNode->strLabel.IsEmpty())
{
pNode->rcText.right = max(pNode->rcText.right, szViewport.cx - s_nOffsetRight);
pNode->rcText.bottom = nTop + m_nItemHeight;
UINT nFlags = DT_CALCRECT | DT_LEFT | DT_NOPREFIX | DT_TOP |
(m_bWrapLabels ? DT_WORDBREAK : DT_SINGLELINE);
int nHeight = dc.DrawText(pNode->strLabel, pNode->rcText, nFlags);
pNode->rcText.bottom = pNode->rcText.top + nHeight;
}
else
pNode->rcText.bottom = nTop + m_nItemHeight - 2;
pNode->rcNode.bottom = max(pNode->rcNode.bottom, pNode->rcText.bottom + 2);
pNode->rcNode.bottom += (pNode->rcNode.bottom % 2);
pNode->rcLabel = pNode->rcText;
pNode->rcLabel.left -= s_nTextOffset;
pNode->rcLabel.right += s_nOffsetRight;
pNode->rcLabel.top = pNode->rcNode.top;
pNode->rcLabel.bottom = pNode->rcNode.bottom;
pNode->rcNode.left = 0;
pNode->rcNode.right = pNode->rcLabel.right;
m_szDisplay.cx = max(m_szDisplay.cx, pNode->rcNode.Width());
nTop = pNode->rcNode.bottom;
}
else
{
pNode->nIndex = -1;
}
if (pNode->HasChildren())
{
s.push(make_pair(pNode->pChild, s.top().second && !pNode->bCollapsed));
++nLevel;
}
else
{
while (!s.empty() && s.top().first->pNext == NULL)
{
s.pop();
--nLevel;
}
if (!s.empty())
s.top().first = s.top().first->pNext;
}
}
m_szDisplay.cy = nTop;
} while (AdjustViewportSize(m_szDisplay, szViewport, bHScroll, bVScroll));
m_szDisplay.cx = max(m_szDisplay.cx, szViewport.cx);
m_szDisplay.cy = max(m_szDisplay.cy, szViewport.cy);
CSize szPage(szViewport.cx*9/10, szViewport.cy*9/10);
CSize szLine(15, 15);
SetScrollSizes(m_szDisplay, szPage, szLine, false);
dc.SelectObject(pOldFont);
SetHoverNode(NULL);
if (!m_bInsideOnSize)
UpdateHoverNode();
Invalidate();
UpdateWindow();
}
int CMyTreeView::OnCreate(LPCREATESTRUCT lpCreateStruct)
{
m_bHasLines = (lpCreateStruct->style & TVS_HASLINES) != 0;
m_bLinesAtRoot = (lpCreateStruct->style & TVS_LINESATROOT) != 0;
m_bHasGlyphs = (lpCreateStruct->style & TVS_HASBUTTONS) != 0;
if (CMyScrollView::OnCreate(lpCreateStruct) == -1)
return -1;
if (IsThemed())
m_hTheme = XPOpenThemeData(m_hWnd, L"TREEVIEW");
m_toolTip.Create(this);
return 0;
}
void CMyTreeView::OnDestroy()
{
if (m_hTheme != NULL)
{
XPCloseThemeData(m_hTheme);
m_hTheme = NULL;
}
m_toolTip.DestroyWindow();
CMyScrollView::OnDestroy();
}
void CMyTreeView::OnSize(UINT nType, int cx, int cy)
{
if (cx > 0 && cy > 0)
{
m_bInsideOnSize = true;
RecalcLayout();
m_bInsideOnSize = false;
}
CMyScrollView::OnSize(nType, cx, cy);
}
BOOL CMyTreeView::OnEraseBkgnd(CDC* pDC)
{
return true;
}
void CMyTreeView::OnThemeChanged()
{
if (m_hTheme != NULL)
XPCloseThemeData(m_hTheme);
m_hTheme = NULL;
if (IsThemed())
m_hTheme = XPOpenThemeData(m_hWnd, L"TREEVIEW");
m_font.DeleteObject();
CreateSystemIconFont(m_font);
LOGFONT lf;
m_font.GetLogFont(&lf);
lf.lfUnderline = true;
m_fontHover.DeleteObject();
m_fontHover.CreateFontIndirect(&lf);
RecalcLayout();
}
void CMyTreeView::OnSysColorChange()
{
Invalidate();
}
void CMyTreeView::OnLButtonDown(UINT nFlags, CPoint point)
{
SetFocus();
UpdateHoverNode(point);
int nArea;
TreeNode* pNode = HitTest(point, &nArea);
if (pNode != NULL)
{
if (nArea == HT_IMAGE || nArea == HT_LABEL)
{
SelectNode(pNode, TVC_BYMOUSE);
}
else if (nArea == HT_GLYPH && pNode->HasChildren())
{
bool bAllChildren = (nFlags & (MK_CONTROL | MK_SHIFT)) != 0;
ToggleNode(pNode, bAllChildren);
}
}
CMyScrollView::OnLButtonDown(nFlags, point);
}
void CMyTreeView::OnRButtonDown(UINT nFlags, CPoint point)
{
SetFocus();
UpdateHoverNode(point);
int nArea;
TreeNode* pNode = HitTest(point, &nArea);
if (pNode != NULL)
{
if (nArea == HT_IMAGE || nArea == HT_LABEL)
{
SelectNode(pNode, TVC_UNKNOWN);
}
}
CMyScrollView::OnRButtonDown(nFlags, point);
}
CMyTreeView::TreeNode* CMyTreeView::HitTest(CPoint point, int* pnArea)
{
return HitTest(m_pRoot, point, pnArea);
}
CMyTreeView::TreeNode* CMyTreeView::HitTest(TreeNode* pNode, CPoint point, int* pnArea)
{
CPoint ptScroll = GetScrollPosition();
if (pNode != m_pRoot && pNode->rcNode.PtInRect(point + ptScroll))
{
if (pNode->rcLabel.PtInRect(point + ptScroll))
*pnArea = HT_LABEL;
else if (pNode->rcImage.PtInRect(point + ptScroll))
*pnArea = HT_IMAGE;
else if (pNode->rcGlyph.PtInRect(point + ptScroll))
*pnArea = HT_GLYPH;
else
*pnArea = HT_OTHER;
return pNode;
}
if (pNode->HasChildren() && !pNode->bCollapsed)
{
for (TreeNode* pChild = pNode->pChild; pChild != NULL; pChild = pChild->pNext)
{
TreeNode* pResult = HitTest(pChild, point, pnArea);
if (pResult != NULL)
return pResult;
}
}
return NULL;
}
void CMyTreeView::InvalidateNode(TreeNode* pNode)
{
CPoint ptScroll = GetScrollPosition();
InvalidateRect(pNode->rcNode - ptScroll);
}
void CMyTreeView::OnMouseMove(UINT nFlags, CPoint point)
{
bool bDragging = (nFlags & (MK_LBUTTON | MK_RBUTTON)) != 0;
if (bDragging)
return;
UpdateHoverNode(point);
CMyScrollView::OnMouseMove(nFlags, point);
}
void CMyTreeView::OnMouseLeave()
{
if (!m_bMouseInTooltip)
SetHoverNode(NULL);
}
void CMyTreeView::UpdateHoverNode()
{
CPoint ptCursor;
::GetCursorPos(&ptCursor);
ScreenToClient(&ptCursor);
UpdateHoverNode(ptCursor);
}
void CMyTreeView::UpdateHoverNode(const CPoint& point)
{
CRect rcViewport(CPoint(0, 0), GetViewportSize());
if (!rcViewport.PtInRect(point))
{
SetHoverNode(NULL);
return;
}
int nArea;
TreeNode* pNode = HitTest(point, &nArea);
if (pNode != NULL && nArea != HT_IMAGE && nArea != HT_LABEL)
pNode = NULL;
SetHoverNode(pNode);
SendMessage(WM_SETCURSOR, (WPARAM) m_hWnd, MAKELPARAM(HTCLIENT, WM_MOUSEMOVE));
}
void CMyTreeView::SetHoverNode(TreeNode* pNode)
{
if (pNode == m_pHoverNode)
return;
if (m_pHoverNode != NULL)
{
InvalidateNode(m_pHoverNode);
m_toolTip.Hide();
m_bMouseInTooltip = false;
++m_toolTip.m_nNextCode;
}
m_pHoverNode = pNode;
if (pNode != NULL)
{
InvalidateNode(pNode);
CPoint ptScroll = GetScrollPosition();
CRect rcLabel = pNode->rcLabel - ptScroll;
CRect rcViewport(CPoint(0, 0), GetViewportSize());
CRect rcIntersect;
if (rcIntersect.IntersectRect(rcLabel, rcViewport) && rcIntersect != rcLabel)
{
CPoint ptTooltip = pNode->rcLabel.TopLeft() + (-ptScroll);
ptTooltip.Offset(s_nTextOffset - 3, 0);
CRect rcTooltip(pNode->rcLabel);
rcTooltip.DeflateRect(s_nTextOffset - 3, 0, 0, 0);
CRect rcTooltipText(pNode->rcText - rcTooltip.TopLeft());
rcTooltip -= ptScroll;
ClientToScreen(rcTooltip);
m_bMouseInTooltip = true;
++m_toolTip.m_nNextCode;
m_toolTip.Show(pNode->strLabel, m_bWrapLabels, rcTooltip, rcTooltipText);
}
}
GetTopLevelParent()->UpdateWindow();
TRACKMOUSEEVENT tme;
ZeroMemory(&tme, sizeof(tme));
tme.cbSize = sizeof(tme);
tme.dwFlags = TME_LEAVE | (m_pHoverNode == NULL || m_toolTip.IsWindowVisible() ? TME_CANCEL : 0);
tme.hwndTrack = m_hWnd;
tme.dwHoverTime = HOVER_DEFAULT;
::TrackMouseEvent(&tme);
}
void CMyTreeView::OnSetFocus(CWnd* pOldWnd)
{
CMyScrollView::OnSetFocus(pOldWnd);
if (m_pSelection != NULL)
{
InvalidateNode(m_pSelection);
UpdateWindow();
}
}
void CMyTreeView::OnKillFocus(CWnd* pNewWnd)
{
CMyScrollView::OnKillFocus(pNewWnd);
SetHoverNode(NULL);
if (m_pSelection != NULL)
{
InvalidateNode(m_pSelection);
UpdateWindow();
}
}
BOOL CMyTreeView::OnSetCursor(CWnd* pWnd, UINT nHitTest, UINT message)
{
if (m_bPanning)
return true;
if (hCursorLink == NULL)
hCursorLink = ::LoadCursor(0, IDC_HAND);
if (hCursorLink == NULL)
hCursorLink = AfxGetApp()->LoadCursor(IDC_CURSOR_LINK);
if (nHitTest == HTCLIENT && m_pHoverNode != NULL)
{
SetCursor(hCursorLink);
return true;
}
return CMyScrollView::OnSetCursor(pWnd, nHitTest, message);
}
bool CMyTreeView::OnScrollBy(CSize szScrollBy, bool bDoScroll)
{
if (!CMyScrollView::OnScrollBy(szScrollBy, bDoScroll))
return false;
SetHoverNode(NULL);
if (!m_bPanning)
UpdateHoverNode();
UpdateWindow();
return true;
}
bool CMyTreeView::OnStartPan()
{
SetHoverNode(NULL);
return true;
}
void CMyTreeView::OnKeyDown(UINT nChar, UINT nRepCnt, UINT nFlags)
{
// Notify parent
NMTVKEYDOWN tvkd;
tvkd.hdr.hwndFrom = GetSafeHwnd();
tvkd.hdr.idFrom = GetDlgCtrlID();
tvkd.hdr.code = TVN_KEYDOWN;
tvkd.wVKey = (WORD) nChar;
tvkd.flags = 0;
GetParent()->SendMessage(WM_NOTIFY, GetDlgCtrlID(), (LPARAM) &tvkd);
TreeNode* pSelectNode = NULL;
switch (nChar)
{
case VK_DOWN:
pSelectNode = FindNextNode(m_pSelection);
break;
case VK_UP:
pSelectNode = FindPrevNode(m_pSelection);
break;
case VK_RIGHT:
if (m_pSelection != NULL)
{
if (m_pSelection->HasChildren())
{
if (m_pSelection->bCollapsed)
ToggleNode(m_pSelection);
else
pSelectNode = m_pSelection->pChild;
}
}
else
{
pSelectNode = FindNextNode(NULL);
}
break;
case VK_LEFT:
if (m_pSelection != NULL)
{
if (m_pSelection->HasChildren() && !m_pSelection->bCollapsed)
ToggleNode(m_pSelection);
else if (m_pSelection->pParent != m_pRoot)
pSelectNode = m_pSelection->pParent;
}
else
{
pSelectNode = FindPrevNode(NULL);
}
break;
case VK_ADD:
if (m_pSelection != NULL && m_pSelection->HasChildren() && m_pSelection->bCollapsed)
ToggleNode(m_pSelection);
break;
case VK_SUBTRACT:
if (m_pSelection != NULL && m_pSelection->HasChildren() && !m_pSelection->bCollapsed)
ToggleNode(m_pSelection);
break;
case VK_NEXT:
pSelectNode = FindNextPageNode(m_pSelection);
break;
case VK_PRIOR:
pSelectNode = FindPrevPageNode(m_pSelection);
break;
}
if (pSelectNode != NULL && pSelectNode != m_pSelection)
SelectNode(pSelectNode, TVC_BYKEYBOARD);
CMyScrollView::OnKeyDown(nChar, nRepCnt, nFlags);
}
void CMyTreeView::SelectItem(HTREEITEM hItem)
{
if (hItem == TVI_ROOT)
{
SelectNode(NULL);
return;
}
TreeNode* pNode = (TreeNode*)hItem;
SelectNode(pNode);
}
void CMyTreeView::SelectNode(TreeNode* pNode, UINT nAction)
{
if (m_pSelection != pNode)
{
NMTREEVIEW nmtv;
InitNotification(nmtv, TVN_SELCHANGING);
nmtv.action = nAction;