VC实现标题栏添加按钮

// NCButton.cpp: implementation of the CNCButton class. // ////////////////////////////////////////////////////////////////////// #include "stdafx.h" #include "NCButton.h" #ifdef _DEBUG #undef THIS_FILE static char THIS_FILE[]=__FILE__; #define new DEBUG_NEW #endif void TransparentBlt2( HDC hdcDest, // 目标DC int nXOriginDest, // 目标X偏移 int nYOriginDest, // 目标Y偏移 int nWidthDest, // 目标宽度 int nHeightDest, // 目标高度 HDC hdcSrc, // 源DC int nXOriginSrc, // 源X起点 int nYOriginSrc, // 源Y起点 int nWidthSrc, // 源宽度 int nHeightSrc, // 源高度 UINT crTransparent // 透明色,COLORREF类型 ) { HBITMAP hOldImageBMP, hImageBMP = CreateCompatibleBitmap(hdcDest, nWidthDest, nHeightDest); // 创建兼容位图 HBITMAP hOldMaskBMP, hMaskBMP = CreateBitmap(nWidthDest, nHeightDest, 1, 1, NULL); // 创建单色掩码位图 HDC hImageDC = CreateCompatibleDC(hdcDest); HDC hMaskDC = CreateCompatibleDC(hdcDest); hOldImageBMP = (HBITMAP)SelectObject(hImageDC, hImageBMP); hOldMaskBMP = (HBITMAP)SelectObject(hMaskDC, hMaskBMP); // 将源DC中的位图拷贝到临时DC中 if (nWidthDest == nWidthSrc && nHeightDest == nHeightSrc) BitBlt(hImageDC, 0, 0, nWidthDest, nHeightDest, hdcSrc, nXOriginSrc, nYOriginSrc, SRCCOPY); else StretchBlt(hImageDC, 0, 0, nWidthDest, nHeightDest, hdcSrc, nXOriginSrc, nYOriginSrc, nWidthSrc, nHeightSrc, SRCCOPY); // 设置透明色 SetBkColor(hImageDC, crTransparent); // 生成透明区域为白色，其它区域为黑色的掩码位图 BitBlt(hMaskDC, 0, 0, nWidthDest, nHeightDest, hImageDC, 0, 0, SRCCOPY); // 生成透明区域为黑色，其它区域保持不变的位图 SetBkColor(hImageDC, RGB(0,0,0)); SetTextColor(hImageDC, RGB(255,255,255)); BitBlt(hImageDC, 0, 0, nWidthDest, nHeightDest, hMaskDC, 0, 0, SRCAND); // 透明部分保持屏幕不变，其它部分变成黑色 SetBkColor(hdcDest,RGB(255,255,255)); SetTextColor(hdcDest,RGB(0,0,0)); BitBlt(hdcDest, nXOriginDest, nYOriginDest, nWidthDest, nHeightDest, hMaskDC, 0, 0, SRCAND); // "或"运算,生成最终效果 BitBlt(hdcDest, nXOriginDest, nYOriginDest, nWidthDest, nHeightDest, hImageDC, 0, 0, SRCPAINT); // 清理、恢复 SelectObject(hImageDC, hOldImageBMP); DeleteDC(hImageDC); SelectObject(hMaskDC, hOldMaskBMP); DeleteDC(hMaskDC); DeleteObject(hImageBMP); DeleteObject(hMaskBMP); } ////////////////////////////////////////////////////////////////////// // Construction/Destruction ////////////////////////////////////////////////////////////////////// CNCButton::CNCButton() { m_bCreated = FALSE; m_hParentWnd = NULL; m_hTooltip = NULL; m_strText = ""; m_nAlign = ALIGN_RIGHT | ALIGN_TOP; m_nState = BTNSTATE_NORMAL; m_nBmpNormal = 0; m_nBmpHover = 0; m_nBmpDown = 0; m_hFont = NULL; } CNCButton::~CNCButton() { if(m_hFont) { DeleteObject(m_hFont); m_hFont = NULL; } } //------------------------------------------------ // 绘制按钮 //------------------------------------------------ void CNCButton::OnPaint() { HDC hdc = GetWindowDC(m_hParentWnd); HBITMAP hMemBmp = CreateCompatibleBitmap(hdc, m_sizeBtn.cx, m_sizeBtn.cy); HDC hMemDC = CreateCompatibleDC(hdc); HBITMAP hOldBmp = (HBITMAP)SelectObject(hMemDC, hMemBmp); // 根据不同的状态画按钮 if((m_nState & BTNSTATE_MOUSEOVER) == BTNSTATE_MOUSEOVER) { if((m_nState & BTNSTATE_LBUTTONDOWN) == BTNSTATE_LBUTTONDOWN) { OnPaintDown(hMemDC); } else { OnPaintHover(hMemDC); } } else { OnPaintNormal(hMemDC); } // 拷贝到屏幕 BitBlt(hdc, m_Rect.left, m_Rect.top, m_sizeBtn.cx, m_sizeBtn.cy, hMemDC, 0, 0, SRCCOPY); if(hOldBmp) SelectObject(hMemDC, hOldBmp); DeleteObject(hMemBmp); ReleaseDC(m_hParentWnd, hMemDC); ReleaseDC(m_hParentWnd, hdc); } //---------------------------------------------------------------- // 创建按钮 // ptOffset为X坐标的位置与Y坐标的位置，具体的位置与对齐方式有关 // sizeBtn是按钮的宽度与高度 //---------------------------------------------------------------- BOOL CNCButton::Create(LPCTSTR lpszText, HWND hParentWnd, POINT& ptOffset, SIZE& sizeBtn, UINT nID) { if(m_bCreated) return FALSE; m_hParentWnd = hParentWnd; m_strText = lpszText; m_ptOffset = ptOffset; m_sizeBtn = sizeBtn; m_nID = nID; if(m_hParentWnd) { if(strlen(lpszText) > 0) { // 创建默认字体 LOGFONT logFont; ZeroMemory((void*)&logFont, sizeof(logFont)); strcpy(logFont.lfFaceName, "宋体"); logFont.lfHeight = -12; logFont.lfWeight = 400; logFont.lfCharSet = GB2312_CHARSET; logFont.lfOutPrecision = OUT_DEFAULT_PRECIS; logFont.lfClipPrecision = OUT_DEFAULT_PRECIS; logFont.lfQuality = PROOF_QUALITY; logFont.lfPitchAndFamily = VARIABLE_PITCH|FF_ROMAN; m_hFont = CreateFontIndirect(&logFont); } RECT rectParent; GetWindowRect(hParentWnd, &rectParent); OnParentSize(0, &rectParent); m_bCreated = TRUE; } else { m_bCreated = FALSE; } return m_bCreated; } //----------------------------------------------------- // 改变大小时调用 // hParentWnd为父窗口, lpRect为父窗口大小 //----------------------------------------------------- void CNCButton::OnParentSize(UINT nSide, LPRECT lpRect) { RECT rectParent; rectParent.left = 0; rectParent.top = 0; rectParent.right = lpRect->right - lpRect->left; rectParent.bottom = lpRect->bottom - lpRect->top; if((m_nAlign & ALIGN_RIGHT) == ALIGN_RIGHT) { m_Rect.right = rectParent.right - m_ptOffset.x; m_Rect.left = m_Rect.right - m_sizeBtn.cx; } else { if((m_nAlign & ALIGN_LEFT) == ALIGN_LEFT) { m_Rect.left = rectParent.left + m_ptOffset.x; m_Rect.right = m_Rect.left + m_sizeBtn.cx; } } if((m_nAlign & ALIGN_BOTTOM) == ALIGN_BOTTOM) { m_Rect.bottom = rectParent.bottom - m_ptOffset.y; m_Rect.top = m_Rect.bottom - m_sizeBtn.cy; } else { if((m_nAlign & ALIGN_TOP) == ALIGN_TOP) { m_Rect.top = rectParent.top + m_ptOffset.y; m_Rect.bottom = m_Rect.top + m_sizeBtn.cy; } } } //------------------------------------------------ // 设置对齐方式 //------------------------------------------------ void CNCButton::SetAlign(UINT nAlign) { m_nAlign = nAlign; } //------------------------------------------------ // WM_HITTEST消息处理 //------------------------------------------------ BOOL CNCButton::OnHitTest(POINT point) { //if(m_Rect.left == 272) // TRACE("%d,%d,%d,%d;%d,%d;()%d\r\n", m_Rect.left,m_Rect.top,m_Rect.right,m_Rect.bottom, // point.x,point.y,PtInRect(&m_Rect, point)); if(PtInRect(&m_Rect, point)) { m_nState |= BTNSTATE_MOUSEOVER; return TRUE; } else { m_nState &= ~BTNSTATE_MOUSEOVER; //TRACE("Hittest 结果:FALSE\r\n"); return FALSE; } } //--------------------------------------------- // 鼠标移动的消息处理 //--------------------------------------------- void CNCButton::OnMouseMove(POINT point) { SetState(GetState() | BTNSTATE_MOUSEOVER); if(GetCapture() != m_hParentWnd) { SetCapture(m_hParentWnd); OnPaint(); OnSetCursor(); ShowTooltip(TRUE); } } //--------------------------------------------- // 左键按下的消息处理 //--------------------------------------------- void CNCButton::OnMouseLButtonDown() { SetState(GetState() | BTNSTATE_LBUTTONDOWN); SetCapture(m_hParentWnd); ShowTooltip(FALSE); } //--------------------------------------------- // 左键释放的消息处理 //--------------------------------------------- void CNCButton::OnMouseLButtonUp() { SetState(GetState() & ~BTNSTATE_LBUTTONDOWN); if((GetState() & BTNSTATE_MOUSEOVER) != BTNSTATE_MOUSEOVER) ReleaseCapture(); } //--------------------------------------------- // 鼠标离开按钮之上 //--------------------------------------------- void CNCButton::OnMouseLeave() { // TRACE("MouseLeave\r\n"); if((GetState() & BTNSTATE_LBU