简单说明Month Calendar控件的应用。以及ComboBox控件的彩色化处理。通过派生类来实现.zip

//******************************************************************* //* TASKLIST.CPP - CTaskList implementation * //* * //* Implements a priority based drop down task list using an * //* ownerdrawn CComboBox. The listbox is sorted by priority level * //* * //* October 06 / 2002 * //* * //* Copyright PCSpectra 2002 (Free for any purpose, except to sell) * //* Website: www.pcspectra.ca * //* * //* Public methods: * //* =============== * //* AddTask() - Adds a task with a specified priority level to list * //* GetTask() - Returns the indexed task text comment use * //* GetPriority() to return the priority level * //* * //* SetCheck() - Set currently indexed item check state * //* GetCheck() - Returns check state of item at index * //* * //* SetColors() - Sets all priority colors * //* GetColorLevelX() - Returns color for X priority level * //* * //* SetPriority() - Changes an items priority and "should" resort * //* GetPriority() - Returns an items current priority level * //* * //* * //* Notes: * //* ====== * //* None * //* * //* History: * //* ======== * //* Month dd/yyyy - None so far * //******************************************************************* #include "stdafx.h" #include "TaskList.h" #include "resource.h" #ifdef _DEBUG #define new DEBUG_NEW #undef THIS_FILE static char THIS_FILE[] = __FILE__; #endif // Global variable // Namespace??? WNDPROC oldWndProc = NULL; // Object construction CTaskList::CTaskList() { // Initialize priority colors with defaults m_clrLevel1 = RGB(000,128,000); // Green m_clrLevel2 = RGB(255,128,000); // Orange m_clrLevel3 = RGB(255,000,000); // Red m_hListBox = NULL; // No handle yet } // Control initialization void CTaskList::PreSubclassWindow() { SetItemHeight(-1, 16); CComboBox::PreSubclassWindow(); } BEGIN_MESSAGE_MAP(CTaskList, CComboBox) //{{AFX_MSG_MAP(CTaskList) ON_CONTROL_REFLECT(CBN_DROPDOWN, OnDropdown) ON_MESSAGE(WM_CTLCOLORLISTBOX, OnCtlColorListBox) //}}AFX_MSG_MAP END_MESSAGE_MAP() // Control content management void CTaskList::AddTask(UINT nLevel, CString strComment) { CString temp; ASSERT((nLevel>0 && nLevel<4)); // Priority levels must be within 1 and 3 // Determine level of priority if(nLevel==1) temp="c"; if(nLevel==2) temp="b"; if(nLevel==3) temp="a"; temp += strComment; // Append comment onto priority level AddString(temp); } // Return task comment string CString CTaskList::GetTask(UINT nIndex) const { CString buff; GetLBText(nIndex, buff); return buff.Mid(1); } // Change item priority void CTaskList::SetPriority(UINT nIndex, UINT nLevel) { // Copy index items data into temp variables DWORD temp = GetItemData(nIndex); CString buff; GetLBText(nIndex, buff); // Remove old item from list DeleteString(nIndex); // Restore old item with changed priority SetItemData(nIndex, temp); // Determine which priority new item has if(nLevel==1) buff.SetAt(0, 'c'); if(nLevel==2) buff.SetAt(0, 'b'); if(nLevel==3) buff.SetAt(0, 'a'); // Insert new item InsertString(nIndex, buff); } // Get an items current priority UINT CTaskList::GetPriority(UINT nIndex) const { CString buff; GetLBText(nIndex, buff); UINT nLevel = 0; switch(buff.GetAt(1)){ case 'a': nLevel = 3; break; case 'b': nLevel = 2; break; case 'c': nLevel = 1; break; } return nLevel; } // Control drawing void CTaskList::DrawItem(LPDRAWITEMSTRUCT lpDIS) { // Initialize some variables required for drawing CDC* pDC = CDC::FromHandle(lpDIS->hDC); CRect rect(lpDIS->rcItem); int nIndex = lpDIS->itemID; // -1 = no item selected // No item is selected so don't draw inside combobox control if(nIndex<0) return; UINT nLen = GetLBTextLen(nIndex); // Allocate temp buffer to hold string and clear to zero LPSTR temp = new char[nLen+1]; memset(temp, 0, nLen+1); // Extract string from listbox and store in temp buffer GetLBText(nIndex, temp); // Copy temp buffer into CString for easier handling CString buff(temp); // Initialize DC pDC->SetBkMode(TRANSPARENT); // Construct bitmap object CBitmap bit; // Determine which bitmap to load from resources if(GetCheck(nIndex)) bit.LoadBitmap(IDB_CHECKED); else bit.LoadBitmap(IDB_UNCHECK); // Create a memory DC thats compatible with current DC CDC memDC; memDC.CreateCompatibleDC(pDC); // Select bitmap into memory DC // Store current DC object and restore later to avoid leaks CBitmap* pTempBit = memDC.SelectObject(&bit); // Bit blit the bitmap onto screen pDC->BitBlt(rect.left, rect.top, 16, 16, &memDC, 0, 0, SRCCOPY); // Restore bitmap object to avoid leaks memDC.SelectObject(pTempBit); // Adjust rectangle for priority color code rect.left+=18; CRect rcColor(rect); // Used to fill priority color code CSize size = pDC->GetTextExtent("Code"); // Color rectangle is width of text above rcColor.right=rcColor.left+size.cx; // Re-adjust item rectangle add padding rect.left=rcColor.right+4; // Draw the color code based on priority level switch(buff.GetAt(0)){ case 'a': // High pDC->SetTextColor(m_clrLevel3); pDC->DrawText("Code", rcColor, DT_LEFT | DT_SINGLELINE | DT_VCENTER); break; case 'b': // Urgent pDC->SetTextColor(m_clrLevel2); pDC->DrawText("Code", rcColor, DT_LEFT | DT_SINGLELINE | DT_VCENTER); break; case 'c': // Normal pDC->SetTextColor(m_clrLevel1); pDC->DrawText("Code", rcColor, DT_LEFT | DT_SINGLELINE | DT_VCENTER); break; } // Draw the item in normal state pDC->SetTextColor(RGB(0,0,0)); // Padd text ONLY!!! rect.DeflateRect(2,0,2,0); pDC->DrawText(buff.Mid(1), rect, DT_LEFT | DT_VCENTER | DT_SINGLELINE); rect.InflateRect(2,0,2,0); // Restore rectangle before item selection // Variables required for drawing item state properly UINT nState = lpDIS->itemState; UINT nAction = lpDIS->itemAction; /*** Determine how to draw the current item ***/ // The following code was borrowed (and used as a template) from a codeproject article // Control Subclassing // Posted 8 Aug 2001 // By Eric Sanchez // Used when an item needs to be selected if((nState & ODS_SELECTED) && (nAction & ODA_SELECT)) { // Draws the highlighted rect pDC->FillSolidRect(rect, GetSysColor(COLOR_HIGHLIGHT)); pDC->SetTextColor(GetSysColor(COLOR_HIGHLIGHTTEXT)); rect.DeflateRect(2,0,2,0); pDC->DrawText(buff.Mid(1), rect, DT_LEFT | DT_VCENTER | DT_SINGLELINE); } // The item needs to be deselected if(!(nState & ODS_SELECTED) && (nAction & ODA_SELECT)) { //We draw the background color pDC->FillSolidRect(rect, GetSysColor(COLOR_WINDOW)); pDC->SetTextColor(GetSysColor(COLOR_WINDOWTEXT)); rect.DeflateRect(2,0,2,0); pDC->DrawText(buff.Mid(1), rect, DT_LEFT | DT_VCENTER | DT_SINGLELINE); } // Item