基于MDI的CTabCtrl实例

/****************************************************************************\ Datei : MDITabs.h Projekt: MDITabs, a tabcontrol for switching between MDI-views Inhalt : CMDITabs implementation Datum : 03.10.2001 Autor : Christian Rodemeyer Hinweis: � 2001 by Christian Rodemeyer \****************************************************************************/ #include "stdafx.h" #include "MDITabs.h" #include <AFXPRIV.H> #include <algorithm> #include <vector> #ifdef _DEBUG #define new DEBUG_NEW #undef THIS_FILE static char THIS_FILE[] = __FILE__; #endif ///////////////////////////////////////////////////////////////////////////// // CMDITabs CMDITabs::CMDITabs() { m_mdiClient = NULL; m_minViews = 0; m_bImages = false; m_bTop = false; } BEGIN_MESSAGE_MAP(CMDITabs, CTabCtrl) //{{AFX_MSG_MAP(CMDITabs) ON_NOTIFY_REFLECT(TCN_SELCHANGE, OnSelChange) ON_WM_PAINT() ON_WM_NCPAINT() ON_WM_CONTEXTMENU() ON_WM_LBUTTONDBLCLK() //}}AFX_MSG_MAP ON_MESSAGE(WM_SIZEPARENT, OnSizeParent) END_MESSAGE_MAP() ///////////////////////////////////////////////////////////////////////////// // CMDITabs message handlers afx_msg LRESULT CMDITabs::OnSizeParent(WPARAM, LPARAM lParam) { if (GetItemCount() < m_minViews) { ShowWindow(SW_HIDE); } else { AFX_SIZEPARENTPARAMS* pParams = reinterpret_cast<AFX_SIZEPARENTPARAMS*>(lParam); const int height = 26 + (m_bImages ? 1 : 0); const int offset = 2; m_height = height + offset; m_width = pParams->rect.right - pParams->rect.left; if (m_bTop) { pParams->rect.top += height; MoveWindow(pParams->rect.left, pParams->rect.top - height, m_width, m_height, true); } else { pParams->rect.bottom -= height; MoveWindow(pParams->rect.left, pParams->rect.bottom - offset, m_width, m_height, true); } ShowWindow(SW_NORMAL); } return 0; } void CMDITabs::OnSelChange(NMHDR* pNMHDR, LRESULT* pResult) { TCITEM item; item.mask = TCIF_PARAM; GetItem(GetCurSel(), &item); ::BringWindowToTop(HWND(item.lParam)); *pResult = 0; } void CMDITabs::Update() { SetRedraw(false); HWND active = ::GetTopWindow(m_mdiClient); // get active view window (actually the frame of the view) typedef std::vector<HWND> TWndVec; typedef TWndVec::iterator TWndIter; TWndVec vChild; // put all child windows in a list (actually a vector) for (HWND child = active; child; child = ::GetNextWindow(child, GW_HWNDNEXT)) { vChild.push_back(child); } TCITEM item; char text[256]; item.pszText = text; for (int i = GetItemCount(); i--;) // for each tab { item.mask = TCIF_PARAM; GetItem(i, &item); TWndIter it = std::find(vChild.begin(), vChild.end(), HWND(item.lParam)); if (it == vChild.end()) // associatete view does no longer exist, so delete the tab { DeleteItem(i); if (m_bImages) RemoveImage(i); } else // update the tab's text, image and selection state { item.mask = TCIF_TEXT; ::GetWindowText(*it, text, 256); if (m_bImages) m_images.Replace(i, (HICON)::GetClassLong(*it, GCL_HICONSM)); SetItem(i, &item); if (*it == active) SetCurSel(i); // associated view is active => make it the current selection vChild.erase(it); // remove view from list } } // all remaining views in vChild have to be added as new tabs i = GetItemCount(); for (TWndIter it = vChild.begin(), end = vChild.end(); it != end; ++it) { item.mask = TCIF_TEXT|TCIF_PARAM|TCIF_IMAGE; ::GetWindowText(*it, text, 256); if (m_bImages) m_images.Add((HICON)::GetClassLong(*it, GCL_HICONSM)); item.iImage = i; item.lParam = LPARAM(*it); InsertItem(i, &item); if (*it == active) SetCurSel(i); ++i; } // this removes the control when there are no tabs and shows it when there is at least one tab bool bShow = GetItemCount() >= m_minViews; if ((!bShow && IsWindowVisible()) || (bShow && !IsWindowVisible())) { static_cast<CMDIFrameWnd*>(FromHandlePermanent(::GetParent(m_mdiClient)))->RecalcLayout(); } RedrawWindow(NULL, NULL, RDW_FRAME|RDW_INVALIDATE|RDW_ERASE); SetRedraw(true); } void CMDITabs::OnPaint() { CPaintDC dc(this); if (GetItemCount() == 0) return; // do nothing // cache some system colors DWORD shadow = ::GetSysColor(COLOR_3DSHADOW); DWORD dark = ::GetSysColor(COLOR_3DDKSHADOW); DWORD hilight = ::GetSysColor(COLOR_3DHILIGHT); DWORD light = ::GetSysColor(COLOR_3DLIGHT); // Special preparations for spin-buttons (in case there are more tabs than fit into the window) // extend borders and prevent system from overdrawing our new pixels if (m_bTop) { ::SetPixel(dc, m_width - 5, m_height - 8, hilight); ::SetPixel(dc, m_width - 5, m_height - 7, light); ::SetPixel(dc, m_width - 6, m_height - 8, hilight); ::SetPixel(dc, m_width - 6, m_height - 7, light); ::ExcludeClipRect(dc, 0, m_height - 6, m_width, m_height - 2); ::ExcludeClipRect(dc, m_width - 6, m_height - 8, m_width - 2, m_height - 6); } else { ::SetPixel(dc, m_width - 5, 2, shadow); ::SetPixel(dc, m_width - 5, 3, dark); ::SetPixel(dc, m_width - 6, 2, shadow); ::SetPixel(dc, m_width - 6, 3, dark); ::ExcludeClipRect(dc, 0, 0, m_width, 2); ::ExcludeClipRect(dc, m_width - 6, 2, m_width - 2, 4); } // windows should draw the control as usual _AFX_THREAD_STATE* pThreadState = AfxGetThreadState(); pThreadState->m_lastSentMsg.wParam = WPARAM(HDC(dc)); Default(); // extend the horizontal border to the left margin if (m_bTop) { ::SetPixel(dc, 0, m_height - 8, hilight); ::SetPixel(dc, 0, m_height - 7, light); } else { ::SetPixel(dc, 0, 2, shadow); } // special drawing if the leftmost tab is selected CRect rect; GetItemRect(GetCurSel(), rect); if (rect.left == 2) // is at the leftmost position a tab selected? { // if yes, remove the leftmost white line and extend the bottom border of the tab int j = m_bImages ? 1 : 0; HPEN pen = ::CreatePen(PS_SOLID, 1, ::GetSysColor(COLOR_3DFACE)); HGDIOBJ old = ::SelectObject(dc, pen); ::MoveToEx(dc, 0, 2, NULL); ::LineTo(dc, 0, 22 + j); ::MoveToEx(dc, 1, 2, NULL); ::LineTo(dc, 1, 22 + j); ::SelectObject(dc, old); ::DeleteObject(pen); if (m_bTop) { ::SetPixel(dc, 0, 0, hilight); ::SetPixel(dc, 1, 0, hilight); ::SetPixel(dc, 0, 1, light); ::SetPixel(dc, 1, 1, light); } else { ::SetPixel(dc, 0, 22 + j, shadow); ::SetPixel(dc, 1, 22 + j, shadow); ::SetPixel(dc, 0, 23 + j, dark); ::SetPixel(dc, 1, 23 + j, dark); } } } void CMDITabs::OnNcPaint() { HDC hdc = ::GetWindowDC(m_hWnd); CRect rect; rect.left = 0; rect.top = m_bTop ? 0 : -2; rect.right = m_width; rect.bottom = m_height; HPEN pen = ::CreatePen(PS_SOLID, 0, ::GetSysColor(COLOR_3DFACE)); HGDIOBJ old = ::SelectObject(hdc, pen); if (m_bTop) { DrawEdge(hdc, rect, EDGE_SUNKEN, BF_LEFT|BF_RIGHT|BF_TOP); ::MoveToEx(hdc, 2, m_height - 1, NULL); ::LineTo(hdc, m_width - 2, m_height - 1); ::MoveToEx(hdc, 2, m_height - 2, NULL); ::LineTo(hdc, m_width - 2, m_height - 2); } else { DrawEdge(hdc, rect, EDGE_SUNKEN, BF_LEFT|BF_RIGHT|BF_BOTTOM); ::MoveToEx(hdc, 2, 0, NULL); ::LineTo(hdc, m_width - 2, 0); ::MoveToEx(hdc, 2, 1, NULL); ::LineTo(hdc, m_width - 2, 1); } ::SelectObject(hdc, old); ::DeleteObject(pen); ::ReleaseDC(m_hWnd, hdc); } void CMDITabs::Create(CFrameWnd* pMainFrame, DWORD dwStyle) { m_bTop = (dwStyle & MT_TOP); m_minViews = (dwStyle & MT_HIDEWLT2VIEWS) ? 2 : 1; CTabCtrl::Create(WS_CHILD|WS_VISIBLE|(m_bTop?0:T