在VC++应用程序中实现颜色选择组合框.docx

在VC+应用程序中实现颜色选择组合框-相信读者朋友们对OFFICE2000一定非常熟悉吧，它里面的东东可真不少，不管是活泼可爱的大眼夹，还是各种平面造型的Windows控件都很受广大用户喜欢。那么这次就让我们来模仿它做个十分常用的控件：颜色组合框。如果你现在正在做关于字处理类的软件时这个东东一定对你有用。程序编译运行后的界面效果如图一所示： 图一、颜色选择组合框 = 0x0400) iMaxColor = COLOR_INFOBK; if(WINVER = 0x0500) iMaxColor = 28; /初始化CB颜色列表框的Item(常见的SysColor值) for(int iLoop = iMinColor; iLoop iIndex = AddString(strColorNameiLoop); lpItem- crColor = :GetSysColor(iLoop); lpItem- lpCaption = strColorNameiLoop; / if(m_crItem.IsEmpty() m_crItem.AddHead(lpItem); else m_crItem.AddTail(lpItem); /该Item是为了用户自定义颜色而设置 LPBSCBITEM lpItem = new BSCBITEM; lpItem- iIndex = AddString(More Colors); lpItem- crColor = RGB(213, 233, 249); lpItem- lpCaption = More Colors; if(m_crItem.IsEmpty() m_crItem.AddHead(lpItem); else m_crItem.AddTail(lpItem); /初始化当前颜色 m_crColor = m_crItem.GetHead()- crColor; BOOL CBSColorComboBox:OnEraseBkgnd(CDC* pDC) ASSERT(pDC- GetSafeHdc(); return false; void CBSColorComboBox:OnPaint() CPaintDC dc(this); OnCBPaint(&dc); void CBSColorComboBox:OnCBPaint(CDC* pDC) ASSERT(pDC- GetSafeHdc(); /绘制客户区 CDC dMemDC; dMemDC.CreateCompatibleDC(pDC); dMemDC.SetMapMode(pDC- GetMapMode(); /画动作 CBitmap mNewBmp; RECT rc; GetClientRect(&rc); mNewBmp.CreateCompatibleBitmap(pDC, rc.right - rc.left, rc.bottom - rc.top); CBitmap* pOldBmp = dMemDC.SelectObject(&mNewBmp); /子类可以以friend方式来访问父类的protected成员变量和函数 CWnd:DefWindowProc(WM_PAINT, (WPARAM)dMemDC.m_hDC, 0); pDC- BitBlt(rc.left, rc.top, rc.right - rc.left, rc.bottom - rc.top, &dMemDC,rc.left ,rc.top, SRCCOPY); /恢复 dMemDC.SelectObject(pOldBmp); pOldBmp- DeleteObject(); dMemDC.DeleteDC(); GetWindowRect(&rc); ScreenToClient(&rc); pDC- DrawEdge(&rc, (m_bOverControl ? BDR_RAISEDINNER: BDR_SUNKENINNER), BF_RECT); void CBSColorComboBox:OnTimer(UINT nIDEvent) if(nIDEvent = 888 & IsWindowEnabled() CPoint point; :GetCursorPos(&point); CRect rect; GetWindowRect(&rect); if(rect.PtInRect(point) m_bOverControl = true; else m_bOverControl = false; KillTimer(nIDEvent); CComboBox:OnTimer(nIDEvent); void CBSColorComboBox:MeasureItem(LPMEASUREITEMSTRUCT lpMeasureItemStruct) lpMeasureItemStruct- itemHeight = iIconY + 5; void CBSColorComboBox:DrawItem(LPDRAWITEMSTRUCT lpDIS) ASSERT(lpDIS- CtlType = ODT_COMBOBOX); /画笔 CDC* pDC = CDC:FromHandle(lpDIS- hDC); ASSERT(pDC- GetSafeHdc(); /绘制区 RECT rc = lpDIS- rcItem; RECT rcIcon(rc), rcTxt(rc); /当前的Item索引号 LPBSCBITEM lpItem = GetItem(lpDIS- itemID); if(lpItem != NULL) /画颜色Icon rcIcon.right = rcIcon.left + iIconX; rcIcon.top += (rc.bottom - rc.top - iIconY) / 2; rcIcon.bottom = rcIcon.top + iIconY; pDC- FillSolidRect(rcIcon.left, rcIcon.top, rcIcon.right - rcIcon.left, rcIcon.bottom - rcIcon.top, lpItem- crColor); pDC- DrawEdge(&rcIcon, BDR_RAISEDINNER, BF_RECT); /开始画文字 int nOldBkMode = pDC- SetBkMode(TRANSPARENT); pDC- SetTextColor(RGB(0, 0, 0); rcTxt.left = rcIcon.right + 5; rcTxt.top = rcIcon.top; pDC- DrawText(lpItem- lpCaption, &rcTxt, DT_VCENTER | DT_END_ELLIPSIS | DT_NOCLIP | DT_SINGLELINE); pDC- SetBkMode(nOldBkMode); void CBSColorComboBox:OnMouseMove(UINT nFlags, CPoint point) m_bOverControl = true; SetTimer(888, 100, NULL); CComboBox:OnMouseMove(nFlags, point); LPBSCBITEM CBSColorComboBox:GetItem(int iIndex) /当前的Item索引号 POSITION pos = m_crItem.FindIndex(iIndex); if(pos) LPBSCBITEM lpItem = m_crItem.GetAt(pos); ASSERT(lpItem); return lpItem; else return (LPBSCBITEM)NULL; COLORREF CBSColorComboBox:GetColor() if(IsWindowEnabled() return m_crColor; else return (m_crColor = GetItem(this- GetCurSel()- crColor); void CBSColorComboBox:GetRGBValue(int* R, int* G, int* B) *R = GetRValue(DWORD)m_crColor); *G = GetGValue(DWORD)m_crColor); *B = GetBValue(DWORD)m_crColor); void CBSColorComboBox:OnSelchange() int iIndex = GetCurSel(); if(iIndex != CB_ERR & iIndex = 0) CDC* pDC = this- GetDC(); /绘制区 RECT rc; int iScrollX = :GetSystemMetrics(SM_CXVSCROLL); GetClientRect(&rc); pDC- FillSolidRect(rc.left + 2, rc.top + 2, rc.right - rc.left - iScrollX - 4, rc.bottom - rc.top - 2, :GetSysColor(COLOR_WINDOW); RECT rcIcon(rc), rcTxt(rc); /当前的Item索引号 LPBSCBITEM lpItem = GetItem(iIndex); if(lpItem != NULL) m_crColor = lpItem- crColor; /画颜色Icon rcIcon.left += 2; rcIcon.right = rcIcon.left + iIconX; rcIcon.top += (rc.bottom - rc.top - iIconY) / 2; rcIcon.bottom = rcIcon.top + iIconY; pDC- FillSolidRect(rcIcon.left, rcIcon.top, rcIcon.right - rcIcon.left, rcIcon.bottom - rcIcon.top, lpItem- crColor); pDC- DrawEdge(&rcIcon, BDR_RAISEDINNER, BF_RECT); /开始画文字 int nOldBkMode = pDC- SetBkMode(TRANSPARENT); pDC- SetTextColor(RGB(0, 0, 0); rcTxt.left = rcIcon.right + 5; rcTxt.top = rcIcon.top; CFont* font = CFont:FromHandle(HFONT):GetStockObject(DEFAULT_GUI_FONT); pDC- SelectObject(font); pDC- DrawText(lpItem- lpCaption, &rcTxt, DT_VCENTER | DT_END_ELLIPSIS | DT_NOCLIP | DT_SINGLELINE); pDC- SetBkMode(nOldBkMode); pDC- DeleteDC(); void CBSColorComboBox:OnSelendok() int iIndex = this- GetCurSel(); LPBSCBITEM lpTmpItem = GetItem(iIndex); if(lpTmpItem != NULL) if(lpTmpItem- lpCaption = More Colors) CColorDialog crDlg(RGB(255, 0, 0), CC_FULLOPEN); int i