MFC截图工具

#include "pch.h"
#include "MFC截图工具.h"
#include "afxdialogex.h"
#include "CutPictureDlg.h"


// CutPictureDlg 对话框

IMPLEMENT_DYNAMIC(CutPictureDlg, CDialogEx)

CutPictureDlg::CutPictureDlg(CWnd* pParent /*=nullptr*/)
	: CDialogEx(IDD_DIALOG_CUTPIC, pParent)
{
	m_traker.m_nStyle = CRectTracker::dottedLine | CRectTracker::resizeInside;
	m_traker.m_nHandleSize = 5;
	m_traker.m_rect.SetRect(0,0,0,0);
	width = GetSystemMetrics(SM_CXSCREEN);
	hight = GetSystemMetrics(SM_CYSCREEN);
	CDC *pDc=GetDesktopWindow()->GetDC();
	CBitmap bmp;
	bmp.CreateCompatibleBitmap(pDc, width,hight);
	m_memDc.CreateCompatibleDC(pDc);
	m_memDc.SelectObject(&bmp);
	m_memDc.BitBlt(0,0, width, hight,pDc,0,0,SRCCOPY);
	pDc->DeleteDC();
	bmp.DeleteObject();
}

CutPictureDlg::~CutPictureDlg()
{
}

void CutPictureDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialogEx::DoDataExchange(pDX);
}


BEGIN_MESSAGE_MAP(CutPictureDlg, CDialogEx)
	ON_WM_LBUTTONDOWN()
	ON_WM_PAINT()
	ON_WM_LBUTTONDBLCLK()
END_MESSAGE_MAP()


// CutPictureDlg 消息处理程序


void CutPictureDlg::OnLButtonDown(UINT nFlags, CPoint point)
{
	// TODO: 在此添加消息处理程序代码和/或调用默认值
	if (m_traker.HitTest(point)<0) {
	
		m_traker.TrackRubberBand(this,point,TRUE);
		m_traker.m_rect.NormalizeRect();
	}
	else {
	
		m_traker.Track(this,point,TRUE);
	
	}
	Invalidate(FALSE);
	CDialogEx::OnLButtonDown(nFlags, point);
}


void CutPictureDlg::OnPaint()
{
	CPaintDC dc(this); // device context for painting
	dc.BitBlt(0,0,width,hight,&m_memDc,0,0,SRCCOPY);
	m_traker.Draw(&dc);
}


void CutPictureDlg::OnLButtonDblClk(UINT nFlags, CPoint point)
{
	// TODO: 在此添加消息处理程序代码和/或调用默认值
	int wid = m_traker.m_rect.Width();
	int hei = m_traker.m_rect.Height();

	CBitmap bmp;
	bmp.CreateCompatibleBitmap(&m_memDc,wid,hei);
	CDC memDc;
	memDc.CreateCompatibleDC(NULL);
	memDc.SelectObject(&bmp);
	memDc.BitBlt(0,0,wid,hei,&m_memDc, m_traker.m_rect.left, m_traker.m_rect.top,SRCCOPY);
	OpenClipboard();
	EmptyClipboard();
	SetClipboardData(CF_BITMAP,bmp);
	CloseClipboard();
	CTime t = CTime::GetCurrentTime();
	srand(time(NULL));
	CString strPicName;
	strPicName.Format(L"C:\\Users\\GreatWall\\Desktop\\截图%s.png", t.Format("%y%m%d%H%M%S"));
	CImage img;
	img.Attach(bmp);
	img.Save(strPicName);
	img.Detach();
	this->ShowWindow(SW_HIDE);
	CDialogEx::OnLButtonDblClk(nFlags, point);
}