可设置文字颜色的listbox

// ColorListBox.cpp : implementation file //------------------------------------------------------------------- // // CColorListBox class - // A CListBox-derived class with optional colored items. // // Version: 1.0 01/10/1998 Copyright � Patrice Godard // // Version: 2.0 09/17/1999 Copyright � Paul M. Meidinger // //------------------------------------------------------------------- #include "stdafx.h" #include "ColorListBox.h" #ifdef _DEBUG #define new DEBUG_NEW #undef THIS_FILE static char THIS_FILE[] = __FILE__; #endif ///////////////////////////////////////////////////////////////////////////// // CColorListBox //------------------------------------------------------------------- // CColorListBox::CColorListBox() // // Return Value: None. // // Parameters : None. // // Remarks : Standard constructor. // { } // CColorListBox //------------------------------------------------------------------- // CColorListBox::~CColorListBox() // // Return Value: None. // // Parameters : None. // // Remarks : Destructor. // { } // ~CColorListBox() BEGIN_MESSAGE_MAP(CColorListBox, CListBox) //{{AFX_MSG_MAP(CColorListBox) //}}AFX_MSG_MAP END_MESSAGE_MAP() ///////////////////////////////////////////////////////////////////////////// // CColorListBox message handlers //------------------------------------------------------------------- // void CColorListBox::DrawItem(LPDRAWITEMSTRUCT lpDIS) // // Return Value: None. // // Parameters : lpDIS - A long pointer to a DRAWITEMSTRUCT structure // that contains information about the type of drawing required. // // Remarks : Called by the framework when a visual aspect of // an owner-draw list box changes. // { if ((int)lpDIS->itemID < 0) return; CDC* pDC = CDC::FromHandle(lpDIS->hDC); COLORREF crText; CString sText; COLORREF crNorm = (COLORREF)lpDIS->itemData; // Color information is in item data. COLORREF crHilite = RGB(255-GetRValue(crNorm), 255-GetGValue(crNorm), 255-GetBValue(crNorm)); // If item has been selected, draw the highlight rectangle using the item's color. if ((lpDIS->itemState & ODS_SELECTED) && (lpDIS->itemAction & (ODA_SELECT | ODA_DRAWENTIRE))) { CBrush brush(crNorm); pDC->FillRect(&lpDIS->rcItem, &brush); } // If item has been deselected, draw the rectangle using the window color. if (!(lpDIS->itemState & ODS_SELECTED) && (lpDIS->itemAction & ODA_SELECT)) { CBrush brush(::GetSysColor(COLOR_WINDOW)); pDC->FillRect(&lpDIS->rcItem, &brush); } // If item has focus, draw the focus rect. if ((lpDIS->itemAction & ODA_FOCUS) && (lpDIS->itemState & ODS_FOCUS)) pDC->DrawFocusRect(&lpDIS->rcItem); // If item does not have focus, redraw (erase) the focus rect. if ((lpDIS->itemAction & ODA_FOCUS) && !(lpDIS->itemState & ODS_FOCUS)) pDC->DrawFocusRect(&lpDIS->rcItem); // Set the background mode to TRANSPARENT to draw the text. int nBkMode = pDC->SetBkMode(TRANSPARENT); // If the item's color information is set, use the highlight color // gray text color, or normal color for the text. if (lpDIS->itemData) { if (lpDIS->itemState & ODS_SELECTED) crText = pDC->SetTextColor(crHilite); else if (lpDIS->itemState & ODS_DISABLED) crText = pDC->SetTextColor(::GetSysColor(COLOR_GRAYTEXT)); else crText = pDC->SetTextColor(crNorm); } // Else the item's color information is not set, so use the // system colors for the text. else { if (lpDIS->itemState & ODS_SELECTED) crText = pDC->SetTextColor(::GetSysColor(COLOR_HIGHLIGHTTEXT)); else if (lpDIS->itemState & ODS_DISABLED) crText = pDC->SetTextColor(::GetSysColor(COLOR_GRAYTEXT)); else crText = pDC->SetTextColor(::GetSysColor(COLOR_WINDOWTEXT)); } // Get and display item text. GetText(lpDIS->itemID, sText); CRect rect = lpDIS->rcItem; // Setup the text format. UINT nFormat = DT_LEFT | DT_SINGLELINE | DT_VCENTER; if (GetStyle() & LBS_USETABSTOPS) nFormat |= DT_EXPANDTABS; // Calculate the rectangle size before drawing the text. pDC->DrawText(sText, -1, &rect, nFormat | DT_CALCRECT); pDC->DrawText(sText, -1, &rect, nFormat); pDC->SetTextColor(crText); pDC->SetBkMode(nBkMode); } // DrawItem //------------------------------------------------------------------- // void CColorListBox::MeasureItem(LPMEASUREITEMSTRUCT lpMIS) // // Return Value: None. // // Parameters : lpMIS - A long pointer to a // MEASUREITEMSTRUCT structure. // // Remarks : Called by the framework when a list box with // an owner-draw style is created. // { // ### Is the default list box item height the same as // the menu check height??? lpMIS->itemHeight = ::GetSystemMetrics(SM_CYMENUCHECK); } // MeasureItem //------------------------------------------------------------------- // int CColorListBox::AddString(LPCTSTR lpszItem) // // Return Value: The zero-based index to the string in the list box. // The return value is LB_ERR if an error occurs; the // return value is LB_ERRSPACE if insufficient space // is available to store the new string. // // Parameters : lpszItem - Points to the null-terminated // string that is to be added. // // Remarks : Call this member function to add a string to a list // box. Provided because CListBox::AddString is NOT // a virtual function. // { return ((CListBox*)this)->AddString(lpszItem); } // AddString //------------------------------------------------------------------- // int CColorListBox::AddString(LPCTSTR lpszItem, COLORREF rgb) // // Return Value: The zero-based index to the string in the list box. // The return value is LB_ERR if an error occurs; the // return value is LB_ERRSPACE if insufficient space // is available to store the new string. // // Parameters : lpszItem - Points to the null-terminated // string that is to be added. // rgb - Specifies the color to be associated with the item. // // Remarks : Call this member function to add a string to a list // box with a custom color. // { int nItem = AddString(lpszItem); if (nItem >= 0) SetItemData(nItem, rgb); return nItem; } // AddString //------------------------------------------------------------------- // int CColorListBox::InsertString(int nIndex, LPCTSTR lpszItem) // // Return Value: The zero-based index of the position at which the // string was inserted. The return value is LB_ERR if // an error occurs; the return value is LB_ERRSPACE if // insufficient space is available to store the new string. // // Parameters : nIndex - Specifies the zero-based index of the position // to insert the string. If this parameter is �1, the string // is added to the end of the list. // lpszItem - Points to the null-terminated string that // is to be inserted. // // Remarks : Inserts a string into the list box. Provided because // CListBox::InsertString is NOT a virtual function. // { return ((CListBox*)this)->InsertString(nIndex, lpszItem); } // InsertString //------------------------------------------------------------------- // int CColorListBox::InsertString(int nIndex, LPCTSTR lpszItem, COLORREF rgb) // // Return Value: The zero-based index of the position at which the // string was inserted. The return value is LB_ERR if // an error occurs; the return value is LB_ERRSPACE if // insufficient space is available to store the new string. // // Parameters : nIndex - Specifies the zero-based index of the position // to insert the string. If this parameter is �1, the string // is added to the end of the list. // lpszItem - Points to the null-terminated string that // is to be inserted. // rgb - Specifies the color to be associated with the item. //