分类: C/C++
2008-08-05 13:52:50
最近,我想用MFC设计一个可以换肤的程序。在网上我没有搜索到任何想要的东西,所以我决定自己写一个。这不是一个很难的问题,但是需要对Windows操作系统的绘制窗口的机制比较熟悉。
二、背景
我提供了下面的一些类:
1. CSkinWin----CSkinWin类是一个绘制定制(自绘)窗口的类。它绘制窗口上、下、左、右边框和标题栏按钮如最大化、关闭按钮。为了作到这一点,CSkinWin类从一个ini文件读入配置信息,在ini文件配置窗口各边框的位图。需要指出的是,ini文件的格式是从Windows Blinds(Stardock的杰作)的UIS格式拷贝过来的,因为我希望在我的程序里支持Windows Blinds的主题。
2. CSkinButton---CSkinButton类是绘制定制(自绘)按钮的类。它用四个位图分别代表正常、有焦点、按下和无效状态。位图格式也是Windows Blinds格式,参数在同一个ini文件中定义。因为一个窗口会有多个按钮实例,所以我设计了CSkinButtonResource类来存放定制(自绘)按钮的皮肤。
3. CMyBimtap 等--- 一些相关类,其中有些是来自Codeproject. 尽管我已经不记得这些作者了,但我还是要感谢它们.
三、用法//defines the following member in the dialog class CSkinButtonResource m_btnres; //skin button resource CSkinWin m_skinWin; //skin win BOOL m_bFirst; //first time call CObList m_wndList; //hold button instance //In OnInitDialog m_bFirst = TRUE; SetSkin( "skin\\neostyle\\theme.ini" ); //SetSkin is a function to change skin BOOL CSkinTestDlg::SetSkin(CString file) { m_skinWin.LoadSkin( file ); //load skin bitmap and parameters m_btnres.LoadSkin( file ); if ( m_bFirst ) { //if it''s the first time call, InstallSkin m_skinWin.InstallSkin( this ); //call EnumChildWindows to subclass all buttons EnumChildWindows( m_hWnd, EnumChildProc, (LPARAM)this ); m_bFirst = FALSE; } //redraw window after change skin SetWindowPos( 0, 0, 0, 0, 0, SWP_NOSIZE | SWP_NOMOVE |SWP_FRAMECHANGED ); return TRUE; } //enum child window and take chance to subclass them #define GetWindowStyle(hwnd) ((DWORD)GetWindowLong(hwnd, GWL_STYLE)) BOOL CALLBACK EnumChildProc( HWND hwnd, // handle to child window LPARAM lParam // application-defined value ) { char classname[200]; CSkinTestDlg *dlg = (CSkinTestDlg *)lParam; DWORD style; GetClassName( hwnd, classname, 200 ); style = GetWindowStyle( hwnd ); if ( strcmp( classname, "Button" ) == 0 ) { style = (UINT)GetWindowLong(hwnd, GWL_STYLE) & 0xff; if ( style == BS_PUSHBUTTON || style == BS_DEFPUSHBUTTON ) dlg->SubClassButton( hwnd ); } return TRUE; } //subclass push buttons BOOL CSkinTestDlg::SubClassButton( HWND hwnd ) { CSkinButton * btn = new CSkinButton(); CWnd* pWnd = CWnd::FromHandlePermanent(hwnd); if ( pWnd == NULL) { btn->SubclassWindow( hwnd ); btn->SetResource( &m_btnres ); return TRUE; } return FALSE; } //free CSkinButton instances void CSkinTestDlg::OnDestroy() { CDialog::OnDestroy(); // TODO: Add your message handler code here POSITION pos; pos = m_wndList.GetHeadPosition(); while( pos ) { CObject *ob = m_wndList.GetAt(pos); if ( ob->GetRuntimeClass() == RUNTIME_CLASS(CSkinButton) ) { delete (CSkinButton*)ob; } m_wndList.GetNext(pos); } }四、历史