MFC贴图实现ScrollBar控件

// CustomScroll.cpp : implementation file // #include "stdafx.h" #include "SkinDlg.h" #include "CustomScroll.h" #ifdef _DEBUG #define new DEBUG_NEW #undef THIS_FILE static char THIS_FILE[] = __FILE__; #endif ///////////////////////////////////////////////////////////////////////////// // CCustomScroll CCustomScroll::CCustomScroll() { m_ButtonDown = FALSE; m_IsLeft = FALSE; m_MinRange = 0; m_MaxRange = 200; m_CurPos = 0; m_IsLeftArrow = FALSE; m_IsRightArrow = FALSE; m_IsTopArrow=FALSE; m_IsBottomArrow=FALSE; m_IsLeftRange = FALSE; m_IsRightRange = FALSE; m_IsTopRange=FALSE; m_IsBottomRange; } CCustomScroll::~CCustomScroll() { } BEGIN_MESSAGE_MAP(CCustomScroll, CStatic) //{{AFX_MSG_MAP(CCustomScroll) ON_WM_PAINT() ON_WM_LBUTTONDOWN() ON_WM_LBUTTONUP() ON_WM_MOUSEMOVE() ON_WM_TIMER() //}}AFX_MSG_MAP END_MESSAGE_MAP() ///////////////////////////////////////////////////////////////////////////// // CCustomScroll message handlers BOOL CCustomScroll::CreateStatic(CWnd *pParent, DWORD dwStyle, UINT nIDStatic, UINT nID) { m_pParent = pParent; ASSERT(m_pParent); //获取父窗口中的静态文本 ASSERT(::IsWindow(pParent->GetDlgItem(nIDStatic)->m_hWnd)); CRect recttemp; pParent->GetDlgItem(nIDStatic)->GetWindowRect(&recttemp); pParent->ScreenToClient(&recttemp); // m_ClientRect = recttemp; pParent->GetDlgItem(nIDStatic)->ShowWindow(SW_HIDE); m_bHorizontal=(dwStyle & SBS_VERT) ? FALSE : TRUE; BOOL ret = CStatic::Create("",dwStyle,recttemp,pParent,nID); pParent->GetDlgItem(nIDStatic)->GetClientRect(&m_ClientRect); if (ret) { CBitmap bmp; // bmp.LoadBitmap(m_LeftArrow); if (m_bHorizontal) { bmp.LoadBitmap(m_LeftArrow); BITMAP bInfo; bmp.GetBitmap(&bInfo); m_ThumbHeight = bInfo.bmHeight; m_ThumbWidth = bInfo.bmWidth; if (bmp.GetSafeHandle()) bmp.DeleteObject(); // bmp.LoadBitmap(IDB_THUMB); bmp.LoadBitmap(IDB_THUMB); // bmp.LoadBitmap(m_bHorizontal?IDB_HTHUMB:/*IDB_VTHUMB*/IDB_THUMB); bmp.GetBitmap(&bInfo); m_ThumbRect.CopyRect(CRect(m_ThumbWidth,0,m_ThumbWidth+bInfo.bmWidth,bInfo.bmHeight)); if (bmp.GetSafeHandle()) bmp.DeleteObject(); SetScrollRange(m_MinRange,m_MaxRange); } else { bmp.LoadBitmap(m_TopArrow); BITMAP bInfo; bmp.GetBitmap(&bInfo); m_ThumbHeight = bInfo.bmHeight; m_ThumbWidth = bInfo.bmWidth; if (bmp.GetSafeHandle()) bmp.DeleteObject(); // bmp.LoadBitmap(IDB_THUMB); bmp.LoadBitmap(IDB_THUMB); // bmp.LoadBitmap(m_bHorizontal?IDB_HTHUMB:/*IDB_VTHUMB*/IDB_THUMB); bmp.GetBitmap(&bInfo); m_ThumbRect.CopyRect(CRect(0,m_ThumbHeight,bInfo.bmWidth,m_ThumbHeight+bInfo.bmHeight)); if (bmp.GetSafeHandle()) bmp.DeleteObject(); SetScrollRange(m_MinRange,m_MaxRange); } } ShowWindow(SW_SHOW); return ret; } void CCustomScroll::DrawHorScroll() { CClientDC dc(this); CMemDC_C memdc(&dc,m_ClientRect); CDC bmpdc; bmpdc.CreateCompatibleDC(&dc); //绘制左箭头 CBitmap bmp; bmp.LoadBitmap(m_LeftArrow); CBitmap* pOldbmp = bmpdc.SelectObject(&bmp); CRect LeftArrowRect (m_ClientRect.left,m_ClientRect.top,m_ClientRect.left+m_ThumbWidth,m_ClientRect.bottom); memdc.StretchBlt(m_ClientRect.left,m_ClientRect.top,m_ThumbWidth,m_ThumbHeight,&bmpdc,0,0,m_ThumbWidth,m_ThumbHeight,SRCCOPY); if (pOldbmp) bmpdc.SelectObject(pOldbmp); if (bmp.GetSafeHandle()) bmp.DeleteObject(); pOldbmp = NULL; //通道的开始位置和宽度 int nChanelStart = m_ClientRect.left+m_ThumbWidth; int nChanelWidth = m_ClientRect.Width()- 2*m_ThumbWidth; //绘制通道 bmp.LoadBitmap(m_ChanelBK); pOldbmp = bmpdc.SelectObject(&bmp); memdc.StretchBlt(nChanelStart,m_ClientRect.top,nChanelWidth,m_ClientRect.Height(),&bmpdc,0,0,1,10,SRCCOPY); if (pOldbmp) bmpdc.SelectObject(pOldbmp); if (bmp.GetSafeHandle()) bmp.DeleteObject(); //绘制右箭头 bmp.LoadBitmap(m_RightArrow); pOldbmp = bmpdc.SelectObject(&bmp); int nRArrowStart = m_ThumbWidth+nChanelWidth; memdc.StretchBlt(nRArrowStart,m_ClientRect.top,m_ThumbWidth,m_ClientRect.Height(),&bmpdc,0,0,m_ThumbWidth,m_ThumbHeight,SRCCOPY); //绘制滚动块 if (bmp.GetSafeHandle()) bmp.DeleteObject(); bmp.LoadBitmap(m_ThumbBK); pOldbmp = bmpdc.SelectObject(&bmp); memdc.StretchBlt(m_ThumbRect.left,m_ThumbRect.top,m_ThumbRect.Width()+1,m_ThumbRect.Height(),&bmpdc,0,0,m_ThumbRect.Width(),m_ThumbRect.Height(),SRCCOPY); } void CCustomScroll::DrawVScroll() { CClientDC dc(this); CMemDC_C memdc(&dc,m_ClientRect); CDC bmpdc; bmpdc.CreateCompatibleDC(&dc); //绘制上箭头 CBitmap bmp; bmp.LoadBitmap(m_TopArrow); CBitmap* pOldbmp = bmpdc.SelectObject(&bmp); // CRect LeftArrowRect (m_ClientRect.left,m_ClientRect.top,m_ClientRect.right,m_ClientRect.bottom+m_ThumbHeight); memdc.StretchBlt(m_ClientRect.left,m_ClientRect.top,m_ThumbWidth,m_ThumbHeight,&bmpdc,0,0,m_ThumbWidth,m_ThumbHeight,SRCCOPY); // CRect rectUpArrow (m_ClientRect.left,m_ClientRect.top,m_ClientRect.right,m_ClientRect.bottom+m_ThumbHeight); // memdc.StretchBlt(rectUpArrow.left,rectUpArrow.top,rectUpArrow.Width(),rectUpArrow.Height(),&bmpdc,0,0,m_ThumbWidth,m_ThumbHeight,SRCCOPY); if (pOldbmp) bmpdc.SelectObject(pOldbmp); if (bmp.GetSafeHandle()) bmp.DeleteObject(); pOldbmp = NULL; //通道的开始位置和宽度 int nChanelStart = m_ClientRect.top+m_ThumbHeight; int nChanelHeight = m_ClientRect.Height()- 2*m_ThumbHeight; //绘制通道 bmp.LoadBitmap(m_ChanelBK); pOldbmp = bmpdc.SelectObject(&bmp); // memdc.StretchBlt(nChanelStart,m_ClientRect.top,nChanelWidth,m_ClientRect.Height(),&bmpdc,0,0,1,10,SRCCOPY); memdc.StretchBlt(m_ClientRect.left,nChanelStart,m_ClientRect.Width(),nChanelHeight,&bmpdc,0,0,m_ThumbWidth,1,SRCCOPY); // // CRect rectChannelDown(m_ClientRect.left, m_ClientRect.top + m_ThumbHeight/2, m_ClientRect.right, nChanelStart + nChanelHeight); // // memdc.StretchBlt(rectChannelDown.left+1, rectChannelDown.top, rectChannelDown.Width()-1, rectChannelDown.Height(), &bmpdc, 0, 0, m_ThumbWidth, m_ThumbHeight, SRCCOPY); if (pOldbmp) bmpdc.SelectObject(pOldbmp); if (bmp.GetSafeHandle()) bmp.DeleteObject(); //绘制下箭头 bmp.LoadBitmap(m_BottomArrow); pOldbmp = bmpdc.SelectObject(&bmp); int nRArrowStart = m_ThumbHeight+nChanelHeight; // memdc.StretchBlt(nRArrowStart,m_ClientRect.top,m_ThumbWidth,m_ClientRect.Height(),&bmpdc,0,0,m_ThumbWidth,m_ThumbHeight,SRCCOPY); memdc.StretchBlt(m_ClientRect.left,nRArrowStart,m_ClientRect.Width(),m_ThumbHeight,&bmpdc,0,0,m_ThumbWidth,m_ThumbHeight,SRCCOPY); if (pOldbmp) bmpdc.SelectObject(pOldbmp); if (bmp.GetSafeHandle()) bmp.DeleteObject(); //绘制滚动块 // if (bmp.GetSafeHandle()) // bmp.DeleteObject(); bmp.LoadBitmap(m_ThumbBK); pOldbmp = bmpdc.SelectObject(&bmp); // memdc.StretchBlt(m_ThumbRect.left,m_ThumbRect.top,m_ThumbRect.Width(),m_ThumbRect.Height(),&bmpdc,0,0,/*m_ThumbRect.Width(),m_ThumbRect.Height()*/m_ThumbWidth,m_ThumbHeight,SRCCOPY); memdc.StretchBlt(m_ThumbRect.left,m_ThumbRect.top,m_ThumbRect.Width(),m_ThumbRect.Height(),&bmpdc,0,0,/*m_ThumbRect.Width(),m_ThumbRect.Height()*/m_ThumbWidth,m_ThumbHeight,SRCCOPY); } void CCustomScroll::DrawControl() { if (m_bHorizontal) DrawHorScroll(); else DrawVScroll(); } void CCustomScroll::OnPaint() { CPaintDC dc(this); // device context for painting DrawControl(); // Do not call CStatic::OnPaint() for painting messages } void CCustomScroll::OnLButtonDown(UINT nFlags, CPoint point) { m_Startpt = point; //确定滚动区域 CRect rcScroll = m_ClientRect; DWORD wparam; SetCapture(); if (m_bHorizontal) { rcScroll.left += m_ThumbWidth; rcScroll.right-= m_ThumbWidth; if (m_ThumbRect.PtInRect(point)) { m_ButtonDown = TRUE; } else if (rcScroll.