【最新】 MFC 修改ComboBox的样式，下拉列表的背景色 + 按钮样式

/* CComBox控件属性必须为: Owner Drawer : Variable Has Strings : False; Type: Drop List; Sort:False 四个条件缺一不可 参考网站: https://blog.csdn.net/wyansai/article/details/51002535?utm_source=blogxgwz0 https://blog.csdn.net/wyansai/article/details/50971959 */ #include "stdafx.h" #include "PngComboBox.h" #include "resource.h" IMPLEMENT_DYNAMIC(CPngComboBox, CComboBox) BEGIN_MESSAGE_MAP(CPngComboBox, CComboBox) ON_WM_PAINT() ON_WM_MOUSEMOVE() ON_WM_ERASEBKGND() ON_WM_LBUTTONDOWN() ON_WM_LBUTTONUP() ON_MESSAGE(WM_MOUSELEAVE, OnMouseLeave) ON_CONTROL_REFLECT(CBN_SELCHANGE, OnCbnSelchange) END_MESSAGE_MAP() // // CPngComboBox::CPngComboBox() { m_bOver = FALSE; m_bArtFont = FALSE; m_pBrsh = CBrush::FromHandle((HBRUSH)GetStockObject(NULL_BRUSH)); m_bgPen.CreatePen(PS_SOLID, 1, RGB(160, 31, 208)); m_font.CreateFont(15, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, _T("宋体")); m_bDown = FALSE; m_selItem = 666666666; m_preSelItem = 666666666; m_bFous = FALSE; m_endIcon = NULL; m_crFrame = DEF_FRAME_COLOR; m_crBgTitle = DEF_BG_COLOR; m_crBgSelected = DEF_SELECT_COLOR; m_crBgNoSelected = DEF_BG_COLOR; m_crArtFont = DEF_FRAME_COLOR; m_norImg = NULL; m_clickImg = NULL; } CPngComboBox::~CPngComboBox() { if(m_bgPen.m_hObject != NULL) { m_bgPen.DeleteObject(); } if(m_pBrsh->m_hObject != NULL) { m_pBrsh->DeleteObject(); } if(m_font.m_hObject != NULL) { m_font.DeleteObject(); } for(auto *e : m_vecItemList) { if(e != NULL) { delete e; } } } void CPngComboBox::AddNewString(CString leftText, UINT icon, COLORREF leftColor) { ItemList *pItem = new ItemList; pItem->clrLeft = leftColor; pItem->hIcon = icon ? AfxGetApp()->LoadIcon(icon) : NULL; pItem->strUrl = leftText; pItem->iItem = AddString(leftText); m_vecItemList.push_back(pItem); } void CPngComboBox::SetEndIcon(UINT endIcon) { m_endIcon = endIcon; } void CPngComboBox::SetRightButton(UINT norImg, UINT clickImg) { m_norImg = ImageFromResource(AfxGetInstanceHandle(), norImg, _T("PNG")); m_clickImg = ImageFromResource(AfxGetInstanceHandle(), clickImg, _T("PNG")); if(!m_norImg || !m_clickImg) { m_norImg = m_clickImg = NULL; } } Image *CPngComboBox::ImageFromResource(HINSTANCE hInstance, UINT uImgID, LPCTSTR lpType) { HRSRC hResInfo = ::FindResource(hInstance, MAKEINTRESOURCE(uImgID), lpType); if(hResInfo == NULL) { return NULL; //fail } DWORD dwSize; dwSize = SizeofResource(hInstance, hResInfo); //get resource size(bytes) HGLOBAL hResData; hResData = ::LoadResource(hInstance, hResInfo); if(hResData == NULL) { return NULL; //fail } HGLOBAL hMem; hMem = ::GlobalAlloc(GMEM_MOVEABLE, dwSize); if(hMem == NULL) { ::FreeResource(hResData); return NULL; } LPVOID lpResData, lpMem; lpResData = ::LockResource(hResData); lpMem = ::GlobalLock(hMem); ::CopyMemory(lpMem, lpResData, dwSize); //copy memory ::GlobalUnlock(hMem); ::FreeResource(hResData); //free memory IStream *pStream; HRESULT hr; hr = ::CreateStreamOnHGlobal(hMem, TRUE, &pStream);//create stream object Image *pImage = NULL; if(SUCCEEDED(hr)) { pImage = Image::FromStream(pStream);//get GDI+ pointer pStream->Release(); } ::GlobalFree(hMem); return pImage; } void CPngComboBox::SetComboColor(COLORREF crFrame, COLORREF crBgTitle, COLORREF crBgSelected, COLORREF crBgNoSelected) { m_crFrame = crFrame; m_crBgTitle = crBgTitle; m_crBgSelected = crBgSelected; m_crBgNoSelected = crBgNoSelected; } void CPngComboBox::SetFontType(int fontSize, CString fontType, BOOL bArtFont, COLORREF crArtFont) { m_font.Detach(); LOGFONT lf; memset(&lf, 0, sizeof(LOGFONT)); lf.lfHeight = fontSize; _tcsncpy_s(lf.lfFaceName, LF_FACESIZE, fontType, fontType.GetLength()); VERIFY(m_font.CreateFontIndirect(&lf)); m_bArtFont = bArtFont; m_crArtFont = crArtFont; } void CPngComboBox::OnNcPaint(CDC *pDC) { //绘制客户区 CDC dMemDC; dMemDC.CreateCompatibleDC(pDC); dMemDC.SetMapMode(pDC->GetMapMode()); //画动作 CBitmap mNewBmp; CRect rc; GetClientRect(&rc); mNewBmp.CreateCompatibleBitmap(pDC, rc.right - rc.left, rc.bottom - rc.top); CBitmap *pOldBmp = dMemDC.SelectObject(&mNewBmp); CPen *pOldPen = dMemDC.SelectObject(&m_bgPen); CBrush bgBs(m_crBgNoSelected); CBrush *pOldBrsh = dMemDC.SelectObject(&bgBs); dMemDC.Rectangle(&rc); dMemDC.SelectObject(pOldPen); dMemDC.SelectObject(&pOldBrsh); if((GetCurSel() > 4) || (GetCurSel() < 0)) { return; } PItemList pItem = m_vecItemList[GetCurSel()]; CPen m_penLeft; CPen m_penRight; CRect rcLeft, rcMid, rcRight; rcLeft = rcMid = rcRight = rc; dMemDC.SetBkMode(TRANSPARENT); //画第一段图标 if(pItem->hIcon != NULL) { rcLeft.left = 5; rcLeft.right = rcLeft.left + 16; rcLeft.top += 4; ::DrawIconEx(dMemDC.m_hDC, rcLeft.left, rcLeft.top, pItem->hIcon, 16, 16, NULL, NULL, DI_NORMAL); } else { rcLeft.right = 0; } //画第二段文本 rcMid.left = rcLeft.right + 5; CFont *pOldFont = dMemDC.SelectObject(&m_font); DrawTextString(&dMemDC, pItem->strUrl, pItem->clrLeft, m_crArtFont, &rcMid); dMemDC.SelectObject(pOldFont); CRect rcEnd(rc); rcEnd.left = rc.right - 22; if(m_norImg == NULL) { if(m_bDown) { dMemDC.DrawFrameControl(&rcEnd, DFC_SCROLL, DFCS_SCROLLDOWN | DFCS_FLAT | DFCS_MONO | DFCS_PUSHED); } else { dMemDC.DrawFrameControl(&rcEnd, DFC_SCROLL, DFCS_SCROLLDOWN | DFCS_FLAT | DFCS_MONO); } } else { Graphics graphics(dMemDC.m_hDC); if(m_bDown) { graphics.DrawImage(m_norImg, rcEnd.left, rcEnd.top + 1, 20, 22); } else { graphics.DrawImage(m_clickImg, rcEnd.left, rcEnd.top + 1, 20, 22); } graphics.ReleaseHDC(dMemDC.m_hDC); } 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(); } void CPngComboBox::OnPaint() { CPaintDC dc(this); // device context for painting OnNcPaint(&dc); } void CPngComboBox::DrawContent(UINT iState, CRect rcClient, CDC *pDC, int itemID) { PItemList pItem = m_vecItemList[itemID]; CPen m_penLeft; CPen m_penRight; CRect rcLeft, rcMid; rcLeft = rcMid = rcClient; pDC->SetBkMode(TRANSPARENT); if(iState & ODS_SELECTED) { //及时更新选择区域 UpdateRect(); } if(itemID == m_selItem) { CPen bgPen; bgPen.CreatePen(PS_SOLID, 1, RGB(141, 178, 227)); CPen *pOldPen = pDC->SelectObject(&bgPen); CBrush bgBs(m_crBgSelected); CBrush *pOldBrush = pDC->SelectObject(&bgBs); pDC->RoundRect(&rcClient, CPoint(5, 5)); pDC->SelectObject(pOldBrush); pDC->SelectObject(pOldPen); bgPen.DeleteObject(); } else { CBrush bgBs(m_crBgNoSelected); pDC->FillRect(&rcClient, &bgBs); } //画第一段图标 if(pItem->hIcon != NULL) { rcLeft.left = 5; rcLeft.right = rcLeft.left + 16; rcLeft.top += 4; ::DrawIconEx(pDC->m_hDC, rcLeft.left, rcLeft.top, pItem->hIcon, 16, 16, NULL, N