1.将菜单栏归零，工具栏放在窗口低部，加载自己新建的工具栏
CMainFrame::OnCreate（）函数中 this->SetMenu(0);
2.将窗口初始化为最大化
APP类中：m_pMainWnd->ShowWindow(SW_MAXIMIZE);
3.去掉边框
CMainFrame::PreCreateWindow（）函数中 cs.style = WS_POPUP;
4.在FRAME类中添加工具栏命令消息，关闭通过ON_COMMAND(ToolBar下的图片ID,实现的函数) this->PostMessage(WM_CLOSE);
5.在VIEW类中添加系统消息keydown
void CDRAWView::OnKeyDown(UINT nChar, UINT nRepCnt, UINT nFlags)
{
if(nChar == VK_ESCAPE)
{
AfxGetMainWnd()->PostMessage(WM_CLOSE);
}
CView::OnKeyDown(nChar, nRepCnt, nFlags);
}
6.将桌面背景贴到窗口上
在Frame.h中添加成员变量和成员函数class CMainFrame : public CFrameWnd{ public: int m_ScreenX; int m_ScreenY; stack stk;//保存图片，实现撤销操作} Frame.cpp的构造函数和析构函数
CMainFrame::CMainFrame(){ m_ScreenX = GetSystemMetrics(SM_CXSCREEN);//屏幕长（调用函数为获取屏幕分辨率） m_ScreenY = GetSystemMetrics(SM_CYSCREEN);//屏幕宽 CWindowDC dc(GetDesktopWindow());//获取桌面屏幕 CDC cdc; cdc.CreateCompatibleDC(&dc);//兼容性DC相当于没有画纸的DC CBitmap* bitmap = new CBitmap; bitmap->CreateCompatibleBitmap(&dc,m_ScreenX,m_ScreenY);//创建一个兼容性位图，第一个参数 cdc.SelectObject(bitmap);//将画纸放在DC上（只有兼容性DC才可以放画纸） cdc.BitBlt(0,0,m_ScreenX,m_ScreenY,&dc,0,0,SRCCOPY); stk.push(bitmap);}CMainFrame::~CMainFrame(){ if(stk.empty() == false) { delete(stk.top()); stk.pop(); }} VIEW.cpp
void CDRAWView::OnDraw(CDC* /*pDC*/){ CDRAWDoc* pDoc = GetDocument(); ASSERT_VALID(pDoc); if (!pDoc) return; CMainFrame* pFrame = (CMainFrame*)AfxGetMainWnd();//父类指针强转为子类，才可使用子类特有变量 CClientDC dc(this); CDC cdc; cdc.CreateCompatibleDC(&dc); cdc.SelectObject(pFrame->stk.top()); dc.BitBlt(0,0,pFrame->m_ScreenX,pFrame->m_ScreenY,&cdc,0,0,SRCCOPY); } 7.添加工具栏
在资源视图中Toolbar下自行绘制，更改对应ID;
在resource.h中将宏改为连续数字
ON_COMMAND_RANGE(ID_PEN,ID_ELLIPSE,&CDRAWView::ONChangeDrawStyle)//连续宏可使用
声明枚举类型 enum{PEN,LINE,RECTANGLE,TRIANGLE,ELLIPSE};（铅笔，直线，长方形，三角形，椭圆形）与resource.h中的顺序对应
在View.h中
class CDRAWView : public CView{ public: int m_DrawStyle; void ONChangeDrawStyle(UINT uid); bool m_blsFlag; CPoint PointMouseDown;}; 在View.cpp中
void CDRAWView::ONChangeDrawStyle(UINT uid){ m_DrawStyle = uid - ID_PEN;}CDRAWView::CDRAWView(){ m_DrawStyle = ID_PEN; m_blsFlag = false;}void CDRAWView::OnLButtonDown(UINT nFlags, CPoint point){ m_blsFlag = true; PointMouseDown = point; CView::OnLButtonDown(nFlags, point);}void CDRAWView::OnLButtonUp(UINT nFlags, CPoint point){ m_blsFlag = false; CView::OnLButtonUp(nFlags, point);}void CDRAWView::OnMouseMove(UINT nFlags, CPoint point){ CClientDC dc(this); CMainFrame* pFrame = (CMainFrame*)AfxGetMainWnd(); if(m_blsFlag) { if(m_DrawStyle == PEN) { dc.MoveTo(PointMouseDown.x,PointMouseDown.y); dc.LineTo(point.x,point.y); PointMouseDown = point; return ; } else { //======================================解决闪屏======================================== CDC MemDC; MemDC.CreateCompatibleDC(&dc); CBitmap* bitmap = new CBitmap; bitmap->CreateCompatibleBitmap(&dc,pFrame->m_ScreenX,pFrame->m_ScreenY); MemDC.SelectObject(bitmap); //-------------------------------------栈顶图片贴图擦除痕迹------------------------------------------------ CDC cdc; cdc.CreateCompatibleDC(&dc); cdc.SelectObject(pFrame->stk.top()); MemDC.BitBlt(0,0,pFrame->m_ScreenX,pFrame->m_ScreenY,&cdc,0,0,SRCCOPY); //------------------------------------------------------------------------------------------------------- switch(m_DrawStyle) { case LINE: MemDC.MoveTo(PointMouseDown.x,PointMouseDown.y); MemDC.LineTo(point.x,point.y); break; case TRIANGLE: { POINT points[3] = { {(PointMouseDown.x+point.x)/2,PointMouseDown.y},{PointMouseDown.x,point.y},{point.x,point.y}}; MemDC.Polygon(points,3); } break; case ELLIPSE: MemDC.Ellipse(PointMouseDown.x,PointMouseDown.y,point.x,point.y); break; case RECTANGLE: MemDC.Rectangle(PointMouseDown.x,PointMouseDown.y,point.x,point.y); break; } dc.BitBlt(0,0,pFrame->m_ScreenX,pFrame->m_ScreenY,&MemDC,0,0,SRCCOPY); //=================================================================================================== } } CView::OnMouseMove(nFlags, point);}