本文介绍了一种基于MFC的简单换肤方案，通过WH_CBT钩子实现在窗口创建和销毁时进行子类化处理，以改变窗口的外观。文章详细展示了如何通过自定义绘图函数为按钮、编辑框等控件定制样式。
mfc程序的界面一向是大家所诟病的，我之前在写微笔记的时候一直痛心界面的丑陋，所以我下定决定自己写一个换肤的库，虽然有不少bug，但是毕竟是自己的成果，还是蛮开心的。
MySkin.h
- #pragma warning(disable:4786)
- #include <map>
- #ifndef ULONG_PTR
- //#define ULONG_PTR unsigned long*
- #include "GdiPlus.h"
- using namespace Gdiplus;
- #endif
- #pragma comment(lib,"gdiplus.lib")
- using namespace std;
- void InitMySkin();
- void UninitMySkin();
- LRESULT CALLBACK
- _MySkinHookFunc(int code, WPARAM wParam, LPARAM lParam);
- LRESULT CALLBACK _MySkinListBoxProc( HWND hwnd,
- UINT uMsg,
- WPARAM wParam,
- LPARAM lParam
- );
- LRESULT CALLBACK _MySkinDialogProc( HWND hwnd,
- UINT uMsg,
- WPARAM wParam,
- LPARAM lParam
- );
- LRESULT CALLBACK _MySkinButtonProc( HWND hwnd,
- UINT uMsg,
- WPARAM wParam,
- LPARAM lParam
- );
- LRESULT CALLBACK _MySkinStaticProc( HWND hwnd,
- UINT uMsg,
- WPARAM wParam,
- LPARAM lParam
- );
- LRESULT CALLBACK _MySkinEditProc( HWND hwnd,
- UINT uMsg,
- WPARAM wParam,
- LPARAM lParam
- );
MySkin.cpp
- #include "StdAfx.h"
- #include "MySkin.h"
- map<HWND,WNDPROC> g_mOldFunc;
- HHOOK g_hMySkinHook;
- GdiplusStartupInput g_gdiplusStartupInput;
- ULONG_PTR g_pGdiToken;
- #define WM_MYDRAWITEM WM_USER+1
- #define WM_MYCTLCOLOR WM_USER+2
- #define WM_MYMEASUREITEM WM_USER+3
- #define WM_GIFSTOP WM_USER+3
- void InitMySkin()
- {
- g_hMySkinHook=SetWindowsHookEx(WH_CBT,_MySkinHookFunc,0,GetCurrentThreadId());
- GdiplusStartup(&g_pGdiToken,&g_gdiplusStartupInput,NULL);
- }
- void UninitMySkin()
- {
- UnhookWindowsHookEx(g_hMySkinHook);
- GdiplusShutdown(g_pGdiToken);
- }
- LRESULT CALLBACK
- _MySkinHookFunc(int code, WPARAM wParam, LPARAM lParam)
- {
- if(code==HCBT_CREATEWND)
- {
- HWND hWin=(HWND)wParam;
- CBT_CREATEWND* s=(CBT_CREATEWND*)lParam;
- TCHAR szClass[255]={0};
- GetClassName(hWin,szClass,255);
- if(_tcsicmp(szClass,"listbox")==0)
- {
- int nStyle=GetWindowLong(hWin,GWL_STYLE);
- if(!(nStyle & LBS_OWNERDRAWFIXED))
- {
- SetWindowLong(hWin,GWL_STYLE,GetWindowLong(hWin,GWL_STYLE)|LBS_OWNERDRAWFIXED|LBS_HASSTRINGS);
- g_mOldFunc[hWin]=(WNDPROC)SetWindowLong(hWin,GWL_WNDPROC,(long)_MySkinListBoxProc);
- }
- }else if(_tcsicmp(szClass,_T("#32770"))==0)
- {
- SetWindowLong(hWin,GWL_STYLE,GetWindowLong(hWin,GWL_STYLE)&~WS_SYSMENU);
- g_mOldFunc[hWin]=(WNDPROC)SetWindowLong(hWin,GWL_WNDPROC,(long)_MySkinDialogProc);
- }else if(_tcsicmp(szClass,_T("button"))==0)
- {
- int nStyle=GetWindowLong(hWin,GWL_STYLE);
- if(!(nStyle & BS_OWNERDRAW))
- {
- nStyle=(GetWindowLong(hWin,GWL_STYLE) & BS_TYPEMASK);
- if(nStyle== BS_PUSHBUTTON || nStyle==BS_DEFPUSHBUTTON)
- {
- SetWindowLong(hWin,GWL_STYLE,GetWindowLong(hWin,GWL_STYLE)|BS_OWNERDRAW);
- g_mOldFunc[hWin]=(WNDPROC)SetWindowLong(hWin,GWL_WNDPROC,(long)_MySkinButtonProc);
- }
- }
- }else if(_tcsicmp(szClass,_T("static"))==0)
- {
- int nStyle=GetWindowLong(hWin,GWL_STYLE);
- if(!(nStyle & SS_OWNERDRAW))
- {
- g_mOldFunc[hWin]=(WNDPROC)SetWindowLong(hWin,GWL_WNDPROC,(long)_MySkinStaticProc);
- }
- }else if(_tcsicmp(szClass,_T("edit"))==0)
- {
- g_mOldFunc[hWin]=(WNDPROC)SetWindowLong(hWin,GWL_WNDPROC,(long)_MySkinEditProc);
- }
- return 0;
- }
- else if(code==HCBT_DESTROYWND)
- {
- HWND hWin=(HWND)wParam;
- if(g_mOldFunc[hWin])
- {
- SetWindowLong(hWin,GWL_WNDPROC,(long)g_mOldFunc[hWin]);
- g_mOldFunc.erase(hWin);
- }
- }
- return CallNextHookEx(g_hMySkinHook,code,wParam,lParam);
- }
- LRESULT CALLBACK _MySkinDialogProc( HWND hwnd,
- UINT uMsg,
- WPARAM wParam,
- LPARAM lParam
- )
- {
- if(uMsg==WM_MEASUREITEM)
- {
- LPMEASUREITEMSTRUCT ms=(LPMEASUREITEMSTRUCT)lParam;
- HWND hWin=GetDlgItem(hwnd,ms->CtlID);
- SendMessage(hWin,WM_MYMEASUREITEM,wParam,lParam);
- return 0;
- }
- else if(uMsg==WM_DRAWITEM)
- {
- LPDRAWITEMSTRUCT ds=(LPDRAWITEMSTRUCT)lParam;
- HWND h=GetDlgItem(hwnd,ds->CtlID);
- ::SendMessage(ds->hwndItem,WM_MYDRAWITEM,wParam,lParam);
- return 0;
- }
- else if(uMsg==WM_CTLCOLOREDIT)
- {
- HBRUSH b=(HBRUSH)::SendMessage(HWND(lParam),WM_MYCTLCOLOR,wParam,lParam);
- return (long)b;
- }else if(uMsg==WM_CTLCOLORDLG)
- {
- CDC dc;
- dc.Attach((HDC)wParam);
- static CBrush b;
- static bool bFont=false;
- b.DeleteObject();
- b.CreateSolidBrush(RGB(253,255,240));
- dc.Detach();
- return (long)(HBRUSH)b;
- }
- else if(uMsg==WM_NCPAINT)
- {
- HDC hdc=GetWindowDC(hwnd);
- CDC *dc=CDC::FromHandle(hdc);
- CRect r1,r2,rLeft,rTop,rRight,rBottom;
- GetWindowRect(hwnd,r1);
- GetClientRect(hwnd,&r2);
- CWnd::FromHandle(hwnd)->ClientToScreen(&r2);
- rLeft.left=0;
- rLeft.top=0;
- rLeft.right=r2.left-r1.left;
- rLeft.bottom=r1.Height();
- rTop.left=0;
- rTop.top=0;
- rTop.right=r1.Width();
- rTop.bottom=r2.top-r1.top;
- rRight.left=r2.left-r1.left+r2.Width();
- rRight.top=0;
- rRight.right=r1.Width();
- rRight.bottom=r1.Height();
- rBottom.left=0;
- rBottom.top=r2.top-r1.top+r2.Height();
- rBottom.right=r1.Width();
- rBottom.bottom=r1.Height();
- dc->FillSolidRect(&rLeft,RGB(113,113,113));
- dc->FillSolidRect(&rTop,RGB(113,113,113));
- dc->FillSolidRect(&rRight,RGB(113,113,113));
- dc->FillSolidRect(&rBottom,RGB(113,113,113));
- CRect rClose;
- rClose.left=r1.Width()-30;
- rClose.right=r1.Width()-10;
- rClose.top=3;
- rClose.bottom=28;
- dc->Draw3dRect(&rClose,RGB(250,250,250),RGB(250,250,250));
- dc->SetBkMode(TRANSPARENT);
- dc->SetTextColor(RGB(250,250,250));
- dc->DrawText(_T("X"),&rClose,DT_CENTER|DT_VCENTER|DT_SINGLELINE);
- HWND hPar=GetParent(hwnd);
- if(hPar==GetDesktopWindow() || IsWindowEnabled(hPar) || hwnd==AfxGetMainWnd()->m_hWnd)
- {
- CRect rMini;
- rMini.left=rClose.left-25;
- rMini.right=rClose.left-5;
- rMini.top=3;
- rMini.bottom=28;
- dc->Draw3dRect(&rMini,RGB(250,250,250),RGB(250,250,250));
- dc->DrawText(_T("_"),&rMini,DT_CENTER|DT_VCENTER|DT_SINGLELINE);
- }
- TCHAR szTitle[_MAX_PATH]={0};
- GetWindowText(hwnd,szTitle,_MAX_PATH);
- dc->TextOut(5,10,szTitle);
- ReleaseDC(hwnd,hdc);
- return 0;
- }else if(uMsg==WM_NCLBUTTONDOWN)
- {
- CPoint p;
- GetCursorPos(&p);
- CRect r,r1,r2;
- GetWindowRect(hwnd,&r);
- CRect rClose;
- rClose.left=r.Width()-30;
- rClose.right=r.Width()-10;
- rClose.top=3;
- rClose.bottom=28;
- r1=rClose;
- CRect rMini;
- rMini.left=rClose.left-25;
- rMini.right=rClose.left-5;
- rMini.top=3;
- rMini.bottom=28;
- r2=rMini;
- r1.OffsetRect(r.TopLeft());
- r2.OffsetRect(r.TopLeft());
- if(PtInRect(&r1,p))
- {
- PostMessage(hwnd,WM_SYSCOMMAND,SC_CLOSE,MAKELPARAM(p.x,p.y));
- return 0;
- }
- HWND hPar=GetParent(hwnd);
- if(hPar==GetDesktopWindow() || IsWindowEnabled(hPar) || hwnd==AfxGetMainWnd()->m_hWnd)
- {
- if(PtInRect(&r2,p))
- {
- PostMessage(hwnd,WM_SYSCOMMAND,SC_MINIMIZE,MAKELPARAM(p.x,p.y));
- return 0;
- }
- }
- }else if(uMsg==WM_NCACTIVATE)
- {
- SendMessage(hwnd,WM_NCPAINT,0,0);
- return 1;
- }else if(uMsg==WM_SETTEXT)
- {
- CallWindowProc(g_mOldFunc[hwnd],hwnd,uMsg,wParam,lParam);
- SendMessage(hwnd,WM_NCPAINT,0,0);
- return 1;
- }
- return CallWindowProc(g_mOldFunc[hwnd],hwnd,uMsg,wParam,lParam);
- }
- LRESULT CALLBACK _MySkinListBoxProc( HWND hwnd,
- UINT uMsg,
- WPARAM wParam,
- LPARAM lParam
- )
- {
- if(uMsg==WM_ERASEBKGND)
- {
- CDC dc;
- dc.Attach((HDC)wParam);
- CRect r;
- GetClientRect(hwnd,&r);
- dc.FillSolidRect(&r,RGB(255,255,176));
- dc.Detach();
- return 0;
- }
- else if(uMsg==WM_MYMEASUREITEM)
- {
- LPMEASUREITEMSTRUCT ms=(LPMEASUREITEMSTRUCT)lParam;
- ms->itemHeight=30;
- return 0;
- }
- else if(uMsg==WM_MYDRAWITEM)
- {
- LPDRAWITEMSTRUCT ds=(LPDRAWITEMSTRUCT)lParam;
- CDC dc;
- dc.Attach(ds->hDC);
- CRect r=ds->rcItem;
- if( (ds->itemState & ODS_SELECTED))
- {
- dc.FillSolidRect(r.left,r.top,r.Width(),r.Height(),RGB(227,251,251));
- dc.DrawEdge(&r,EDGE_SUNKEN,BF_BOTTOM);
- }
- else/* if((ds->itemAction & ODA_DRAWENTIRE) || !(ds->itemState & ODS_SELECTED))*/
- {
- dc.FillSolidRect(r.left,r.top,r.Width(),r.Height(),RGB(255,255,176));
- dc.DrawEdge(&r,EDGE_RAISED,BF_BOTTOM);
- }
- CPen p;
- p.CreatePen(PS_SOLID,2,RGB(92,92,92));
- CPen *oldPen=dc.SelectObject(&p);
- dc.MoveTo(r.left,r.bottom-1);
- dc.LineTo(r.right,r.bottom-1);
- dc.SelectObject(oldPen);
- TCHAR txt[255]={0};
- SendMessage(ds->hwndItem,LB_GETTEXT,ds->itemID,(long)txt);
- dc.SetBkMode(TRANSPARENT);
- // dc.SetBkColor(RGB(222,22,2));
- dc.SetTextColor(RGB(111,111,11));
- CFont f;
- f.CreatePointFont(120,_T("微软雅黑"));
- CFont *oldFont=dc.SelectObject(&f);
- dc.DrawText(txt,strlen(txt),&(ds->rcItem),DT_CENTER|DT_VCENTER|DT_SINGLELINE);
- dc.SelectObject(oldFont);
- dc.Detach();
- return 0;
- }
- return CallWindowProc(g_mOldFunc[hwnd],hwnd,uMsg,wParam,lParam);
- }
- LRESULT CALLBACK _MySkinButtonProc( HWND hwnd,
- UINT uMsg,
- WPARAM wParam,
- LPARAM lParam
- )
- {
- if(uMsg==WM_MYDRAWITEM)
- {
- LPDRAWITEMSTRUCT ds=(LPDRAWITEMSTRUCT)lParam;
- CDC dc;
- CRect r=ds->rcItem;
- dc.Attach(ds->hDC);
- dc.Draw3dRect(&ds->rcItem,RGB(2,25,25),RGB(10,0,10));
- dc.FillSolidRect(&ds->rcItem,RGB(143,143,216));//Here you can define the required color to appear on the Button.
- UINT state=ds->itemState; //This defines the state of the Push button either pressed or not.
- if((state & ODS_SELECTED))
- {
- dc.DrawEdge(&ds->rcItem,EDGE_SUNKEN,BF_RECT);
- }
- else
- {
- dc.DrawEdge(&ds->rcItem,EDGE_RAISED,BF_RECT);
- }
- dc.SetBkMode(TRANSPARENT);
- dc.SetTextColor(RGB(0,0,0)); //Setting the Text Color
- TCHAR buffer[MAX_PATH]; //To store the Caption of the button.
- ZeroMemory(buffer,MAX_PATH ); //Intializing the buffer to zero
- ::GetWindowText(ds->hwndItem,buffer,MAX_PATH); //Get the Caption of Button Window
- dc.DrawText(buffer,&ds->rcItem,DT_CENTER|DT_VCENTER|DT_SINGLELINE);//Redraw the Caption of Button Window
- dc.Detach();
- return 0;
- }
- return CallWindowProc(g_mOldFunc[hwnd],hwnd,uMsg,wParam,lParam);
- }
- LRESULT CALLBACK _MySkinStaticProc( HWND hwnd,
- UINT uMsg,
- WPARAM wParam,
- LPARAM lParam
- )
- {
- if(uMsg==WM_PAINT)
- {
- HWND hPar=GetParent(hwnd);
- HDC pDc=GetDC(hPar);
- COLORREF color=GetBkColor(pDc);
- ReleaseDC(hPar,pDc);
- CPaintDC dc(CWnd::FromHandle(hwnd));
- CRect r;
- GetClientRect(hwnd,&r);
- dc.FillSolidRect(&r,color);
- TCHAR szText[_MAX_PATH]={0};
- GetWindowText(hwnd,szText,_MAX_PATH);
- CFont *ff=dc.GetCurrentFont();
- LOGFONT lf;
- memset(&lf, 0, sizeof(LOGFONT));
- lf.lfCharSet = DEFAULT_CHARSET;
- ff->GetLogFont(&lf);
- if(lf.lfHeight+2>r.Height())
- {
- lf.lfHeight=r.Height()+2;
- }
- else
- {
- lf.lfHeight=lf.lfHeight+2;
- }
- _tcscpy(lf.lfFaceName,_T("微软雅黑"));
- CFont f;
- f.CreateFontIndirect(&lf);
- // f.CreatePointFont(90,_T("微软雅黑"));
- CFont *oldFont=dc.SelectObject(&f);
- dc.SetBkMode(TRANSPARENT);
- dc.SetTextColor(RGB(7,126,152));
- int height=dc.DrawText(szText,&r,DT_EDITCONTROL|DT_WORDBREAK|DT_CALCRECT);
- //r.DeflateRect(0,height);
- dc.DrawText(szText,&r,DT_EDITCONTROL|DT_WORDBREAK);
- dc.SelectObject(oldFont);
- return 0;
- }
- return CallWindowProc(g_mOldFunc[hwnd],hwnd,uMsg,wParam,lParam);
- }
- LRESULT CALLBACK _MySkinEditProc( HWND hwnd,
- UINT uMsg,
- WPARAM wParam,
- LPARAM lParam
- )
- {
- if(uMsg==WM_MYCTLCOLOR)
- {
- CDC dc;
- dc.Attach((HDC)wParam);
- static CBrush b;
- static bool bFont=false;
- b.DeleteObject();
- b.CreateSolidBrush(RGB(181,207,230));
- dc.SetBkMode(TRANSPARENT);
- dc.SetBkColor(RGB(181,207,230));
- dc.SetTextColor(RGB(88,3,46));
- dc.Detach();
- if(!bFont)
- {
- static CFont f;
- f.CreatePointFont(120,_T("微软雅黑"));
- SendMessage(hwnd,WM_SETFONT,(WPARAM)(HFONT)f,MAKELPARAM(1,0));
- bFont=1;
- }
- return (long)(HBRUSH)b;
- }
- return CallWindowProc(g_mOldFunc[hwnd],hwnd,uMsg,wParam,lParam);
- }
这个换肤是挂钩WH_CBT钩子，这个钩子会在窗口的创建前和销毁前响应，正好适合我们在这里子类化来修改新窗口的消息处理函数，我们把修改的窗口保存到一个map里，然后当窗口销毁时还原原来的消息处理函数，在绘制的过程中，CStatic我用的是wm_paint消息，而其他的控件我用的是owner draw。在这里我发现一点，就是在一个窗体owner draw之前会判断当前有没有无效区，也就是调用beginpaint函数，要是调用了，就不会owner draw，因为子窗体在wm_paint里已经自我绘制了，就不需要交给父窗体来帮他绘制。
换肤很简单，在mfc的InitInstance中，主窗体doModal前调用InitMySkin()即可，释放在ExitInstance中调用UninitMySkin()即可。
本文有不足之处，还望大家多多指正。
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