MFC透明窗口 问题：窗口移动，背景透明解决

父子窗口，父窗口透明，子窗口绘制控件   子窗口设置透明衍射rgb(255,0,255)

把控件的绘制底色设置成这个颜色就可以实现控件边缘透明，字体也是

处理单击选中移动：OLButtonDown{

PostMessage(WM_NCLBUTTONDOWN,HTCAPTION,MAKELPARAM(point.x,point.y);

}

 

 

#include "stdafx.h"
#include "Test.h"
#include "TestDlg.h"

#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif

/////////////////////////////////////////////////////////////////////////////
// CTestApp

BEGIN_MESSAGE_MAP(CTestApp, CWinApp)
 //{{AFX_MSG_MAP(CTestApp)
  // NOTE - the ClassWizard will add and remove mapping macros here.
  //    DO NOT EDIT what you see in these blocks of generated code!
 //}}AFX_MSG
 ON_COMMAND(ID_HELP, CWinApp::OnHelp)
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CTestApp construction

CTestApp::CTestApp()
{
 // TODO: add construction code here,
 // Place all significant initialization in InitInstance
}

/////////////////////////////////////////////////////////////////////////////
// The one and only CTestApp object

CTestApp theApp;
ULONG_PTR gdiplusToken;

/////////////////////////////////////////////////////////////////////////////
// CTestApp initialization

BOOL CTestApp::InitInstance()
{
 AfxEnableControlContainer();
 GdiplusStartupInput gdiplusStartupInput;
 GdiplusStartup(&gdiplusToken, &gdiplusStartupInput, NULL);
 // Standard initialization
 // If you are not using these features and wish to reduce the size
 //  of your final executable, you should remove from the following
 //  the specific initialization routines you do not need.

#ifdef _AFXDLL
 Enable3dControls();   // Call this when using MFC in a shared DLL
#else
 Enable3dControlsStatic(); // Call this when linking to MFC statically
#endif

 CTestDlg dlg;
 m_pMainWnd = &dlg;
 int nResponse = dlg.DoModal();
 if (nResponse == IDOK)
 {
  // TODO: Place code here to handle when the dialog is
  //  dismissed with OK
 }
 else if (nResponse == IDCANCEL)
 {
  // TODO: Place code here to handle when the dialog is
  //  dismissed with Cancel
 }

 // Since the dialog has been closed, return FALSE so that we exit the
 //  application, rather than start the application's message pump.
 return FALSE;
}

int CTestApp::ExitInstance()
{
 // TODO: Add your specialized code here and/or call the base class
 GdiplusShutdown(gdiplusToken);
 return CWinApp::ExitInstance();
}

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public:
 CAboutDlg();

// Dialog Data
 //{{AFX_DATA(CAboutDlg)
 enum { IDD = IDD_ABOUTBOX };
 //}}AFX_DATA

 // ClassWizard generated virtual function overrides
 //{{AFX_VIRTUAL(CAboutDlg)
 protected:
 virtual void DoDataExchange(CDataExchange* pDX);    // DDX/DDV support
 //}}AFX_VIRTUAL

// Implementation
protected:
 //{{AFX_MSG(CAboutDlg)
 //}}AFX_MSG
 DECLARE_MESSAGE_MAP()
};

CAboutDlg::CAboutDlg() : CDialog(CAboutDlg::IDD)
{
 //{{AFX_DATA_INIT(CAboutDlg)
 //}}AFX_DATA_INIT
}

void CAboutDlg::DoDataExchange(CDataExchange* pDX)
{
 CDialog::DoDataExchange(pDX);
 //{{AFX_DATA_MAP(CAboutDlg)
 //}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CAboutDlg, CDialog)
 //{{AFX_MSG_MAP(CAboutDlg)
  // No message handlers
 //}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CTestDlg dialog

CTestDlg::CTestDlg(CWnd* pParent /*=NULL*/)
 : CDialog(CTestDlg::IDD, pParent)
{
 //{{AFX_DATA_INIT(CTestDlg)
  // NOTE: the ClassWizard will add member initialization here
 //}}AFX_DATA_INIT
 // Note that LoadIcon does not require a subsequent DestroyIcon in Win32
 m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);
}

void CTestDlg::DoDataExchange(CDataExchange* pDX)
{
 CDialog::DoDataExchange(pDX);
 //{{AFX_DATA_MAP(CTestDlg)
  // NOTE: the ClassWizard will add DDX and DDV calls here
 //}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CTestDlg, CDialog)
 //{{AFX_MSG_MAP(CTestDlg)
 ON_WM_SYSCOMMAND()
 ON_WM_PAINT()
 ON_WM_QUERYDRAGICON()
 ON_WM_MOVE()
 ON_WM_CREATE()
 //}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CTestDlg message handlers

BOOL CTestDlg::OnInitDialog()
{
 CDialog::OnInitDialog();
 // Add "About..." menu item to system menu.
 // IDM_ABOUTBOX must be in the system command range.
 ASSERT((IDM_ABOUTBOX & 0xFFF0) == IDM_ABOUTBOX);
 ASSERT(IDM_ABOUTBOX < 0xF000);

 CMenu* pSysMenu = GetSystemMenu(FALSE);
 if (pSysMenu != NULL)
 {
  CString strAboutMenu;
  strAboutMenu.LoadString(IDS_ABOUTBOX);
  if (!strAboutMenu.IsEmpty())
  {
   pSysMenu->AppendMenu(MF_SEPARATOR);
   pSysMenu->AppendMenu(MF_STRING, IDM_ABOUTBOX, strAboutMenu);
  }
 }

 // Set the icon for this dialog.  The framework does this automatically
 //  when the application's main window is not a dialog
 SetIcon(m_hIcon, TRUE);   // Set big icon
 SetIcon(m_hIcon, FALSE);  // Set small icon
 
 // TODO: Add extra initialization here
 //初始化GDI+.
 m_Blend.BlendOp=0; //theonlyBlendOpdefinedinWindows2000
 m_Blend.BlendFlags=0; //nothingelseisspecial...
 m_Blend.AlphaFormat=1; //...
 m_Blend.SourceConstantAlpha=255;//AC_SRC_ALPHA

 //窗体样式为0x80000为层级窗体
 DWORD dwExStyle=GetWindowLong(m_hWnd,GWL_EXSTYLE);
 SetWindowLong(m_hWnd,GWL_EXSTYLE,dwExStyle^0x80000);
 
 //绘制内存位图
 HDC hdcTemp=GetDC()->m_hDC;
 m_hdcMemory=CreateCompatibleDC(hdcTemp);
 HBITMAP hBitMap=CreateCompatibleBitmap(hdcTemp,500,500);
 SelectObject(m_hdcMemory,hBitMap);
 
 //使用GDI+载入PNG图片
 HDC hdcScreen=::GetDC (m_hWnd);
 RECT rct;
 GetWindowRect(&rct);
 POINT ptWinPos={rct.left,rct.top};
 Graphics graph(m_hdcMemory);   //GDI+中的类
 Image image(L"bk.png",TRUE);   //GDI+中的类
 graph.DrawImage(&image,0,0,267,154); //后面两个参数要设置成跟图片一样大小，否则会失真

 //使用UpdateLayerWindow进行窗口透明处理
 HMODULE hFuncInst=LoadLibrary("User32.DLL");
 typedef BOOL (
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WINAPI *MYFUNC)(HWND,HDC,POINT*,SIZE*,HDC,POINT*,COLORREF,BLENDFUNCTION*,DWORD);         
 MYFUNC UpdateLayeredWindow;
 UpdateLayeredWindow=(MYFUNC)GetProcAddress(hFuncInst,"UpdateLayeredWindow");
 SIZE sizeWindow={267,154};
 POINT ptSrc={0,0};
 UpdateLayeredWindow( m_hWnd,hdcScreen,&ptWinPos,&sizeWindow,m_hdcMemory,&ptSrc,0,&m_Blend,2);

 return TRUE;  // return TRUE  unless you set the focus to a control
}

void CTestDlg::OnSysCommand(UINT nID, LPARAM lParam)
{
 if ((nID & 0xFFF0) == IDM_ABOUTBOX)
 {
  CAboutDlg dlgAbout;
  dlgAbout.DoModal();
 }
 else
 {
  CDialog::OnSysCommand(nID, lParam);
 }
}

// If you add a minimize button to your dialog, you will need the code below
//  to draw the icon.  For MFC applications using the document/view model,
//  this is automatically done for you by the framework.

void CTestDlg::OnPaint()
{
 if (IsIconic())
 {
  CPaintDC dc(this); // device context for painting

  SendMessage(WM_ICONERASEBKGND, (WPARAM) dc.GetSafeHdc(), 0);

  // Center icon in client rectangle
  int cxIcon = GetSystemMetrics(SM_CXICON);
  int cyIcon = GetSystemMetrics(SM_CYICON);
  CRect rect;
  GetClientRect(&rect);
  int x = (rect.Width() - cxIcon + 1) / 2;
  int y = (rect.Height() - cyIcon + 1) / 2;

  // Draw the icon
  dc.DrawIcon(x, y, m_hIcon);
 }
 else
 {
  CDialog::OnPaint();
 }
}

// The system calls this to obtain the cursor to display while the user drags
//  the minimized window.
HCURSOR CTestDlg::OnQueryDragIcon()
{
 return (HCURSOR) m_hIcon;
}

void CTestDlg::OnMove(int x, int y)
{
 CDialog::OnMove(x, y);
 // TODO: Add your message handler code here
 CRect rcWindow;                  // 使用MoveWindow函数的示例
 GetWindowRect(rcWindow);
 rcWindow.bottom-=10;
 rcWindow.left+=10;
 rcWindow.right-=10;
 rcWindow.top+=20;
 pChildWnd->MoveWindow(&rcWindow);
}

int CTestDlg::OnCreate(LPCREATESTRUCT lpCreateStruct)
{
 if (CDialog::OnCreate(lpCreateStruct) == -1)
  return -1;
 
 // TODO: Add your specialized creation code here
 //创建子窗体
 pChildWnd=new COnWindow(this);
 pChildWnd->Create(IDD_ONWINDOW_DIALOG);
 pChildWnd->ShowWindow(SW_SHOW);

 return 0;
}
///////////////////////////////////////////////

 

 

// OnWindow.cpp : implementation file
//

#include "stdafx.h"
#include "Test.h"
#include "OnWindow.h"
#include "TestDlg.h"

#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif

/////////////////////////////////////////////////////////////////////////////
// COnWindow dialog

COnWindow::COnWindow(CWnd* pParent /*=NULL*/)
 : CDialog(COnWindow::IDD, pParent)
{
 //{{AFX_DATA_INIT(COnWindow)
 //}}AFX_DATA_INIT
}

void COnWindow::DoDataExchange(CDataExchange* pDX)
{
 CDialog::DoDataExchange(pDX);
 //{{AFX_DATA_MAP(COnWindow)
 //}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(COnWindow, CDialog)
 //{{AFX_MSG_MAP(COnWindow)
 ON_WM_CTLCOLOR()
 //}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// COnWindow message handlers

BOOL COnWindow::OnInitDialog()
{
 CDialog::OnInitDialog();
 
 // TODO: Add extra initialization here
 m_brush.CreateSolidBrush(RGB(255,0,255));  //背景设置为粉红色

 //SetWindowsLong将窗体设置为层级窗体
 DWORD dwExStyle=GetWindowLong(m_hWnd,GWL_EXSTYLE);
 SetWindowLong(m_hWnd,GWL_EXSTYLE,dwExStyle|0x80000);
 
 //用SetLayeredWindowAttributes设置透明色为0，它比UpdateLayeredWindow的使用要简单些
 HMODULE hInst=LoadLibrary("User32.DLL");
 typedef BOOL (WINAPI *MYFUNC)(HWND,COLORREF,BYTE,DWORD);
 MYFUNC SetLayeredWindowAttributes = NULL;
 SetLayeredWindowAttributes=(MYFUNC)GetProcAddress(hInst, "SetLayeredWindowAttributes");
 SetLayeredWindowAttributes(this->GetSafeHwnd(),0xff00ff,0,1);
 FreeLibrary(hInst);

 //载入按钮位图
 m_ok.LoadBitmaps(IDB_OK1,IDB_OK2);
 m_cancel.LoadBitmaps(IDB_CANCEL1,IDB_CANCEL2);
 m_ok.SubclassDlgItem(IDOK, this);
 m_cancel.SubclassDlgItem(IDCANCEL, this);

 return TRUE;  // return TRUE unless you set the focus to a control
               // EXCEPTION: OCX Property Pages should return FALSE
}

HBRUSH COnWindow::OnCtlColor(CDC* pDC, CWnd* pWnd, UINT nCtlColor)
{
 HBRUSH hbr = CDialog::OnCtlColor(pDC, pWnd, nCtlColor);
 // TODO: Change any attributes of the DC here
 if(nCtlColor=CTLCOLOR_DLG)
  return m_brush;
 return  CDialog::OnCtlColor(pDC,   pWnd,   nCtlColor);  
}

void COnWindow::OnOK()
{
 // TODO: Add extra validation here
 HWND hWnd=GetParent()->m_hWnd;
 ::SendMessage(hWnd,WM_CLOSE,0,0);
}

void COnWindow::OnCancel()
{
 // TODO: Add extra cleanup here
 HWND hWnd=GetParent()->m_hWnd;
 ::SendMessage(hWnd,WM_CLOSE,0,0);
}