分类： C/C++
2008-08-05 13:54:26
BOOL IRStartup( HINSTANCE hModule, DWORD dwThreadID )
{
globalWndHookEx = SetWindowsHookEx(
WH_CALLWNDPROC, (HOOKPROC) IRCallWndProc, hModule, dwThreadID );
return TRUE;
}
这也是像SkinMagic一类工具的初始化函数。当然在退出时也要释放钩子的。
BOOL IRComplete( void )
{
UnhookWindowsHookEx( globalWndHookEx );
return TRUE;
}
接下来，就是IRCallWndProc这个回调函数的编写，这是至关重要的一个环节，这个函数就是对所要换肤的类对象进行了监视，并改变其消息处理函数，实现换肤的目的。
LRESULT CALLBACK IRCallWndProc( int nCode, WPARAM wParam, LPARAM lParam )
{
PCWPSTRUCT pcs = (PCWPSTRUCT) lParam;
HWND hWnd = pcs->hwnd;
if( hWnd ) {
char sClassName[201] = "\0";
GetClassName( hWnd, sClassName, 200 );
if( strcmp( sClassName, "Button" ) == 0 ) {
CWnd *pWnd = CWnd::FromHandle( hWnd );
DWORD dwStyle = pWnd->GetStyle();
if( dwStyle == 0x50010000 ) {
WNDPROC WndProc;
WndProc = (WNDPROC) GetWindowLong( hWnd, GWL_WNDPROC );
if( CButtonExt::m_cWndProc != NULL && \
WndProc != CButtonExt::m_cWndProc )
{
return CallNextHookEx( globalWndHookEx,
nCode,
wParam,
lParam );
}
if( WndProc != (WNDPROC) CButtonExt::DefWindowProc ) {
WndProc = (WNDPROC) SetWindowLong(
hWnd,
GWL_WNDPROC,
(LONG) CButtonExt::DefWindowProc );
CButtonExt::m_cWndProc = WndProc;
}
}
}
}
return CallNextHookEx( globalWndHookEx, nCode, wParam, lParam );
}
这样就对按钮的消息进行了挂钩处理了，就可以重新来绘制按钮了。紧接着就是给出按钮控件的绘制方法，我是用一个类来实现的，都是使用的静态函数直接调用的。
#define STATUS_BUTTON_NORMAL 0x00000000
#define STATUS_BUTTON_HOVER 0x00000001
#define STATUS_BUTTON_DOWN 0x00000002
class CButtonExt
{
public:
CButtonExt() {}
~CButtonExt() {}
static UINT m_nStatus;
static WNDPROC m_cWndProc;
static LRESULT DefWindowProc( HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam )
{
CWnd *pWnd = NULL;
CPoint point;
pWnd = CWnd::FromHandle( hWnd );
switch( message )
{
case WM_PAINT:
return OnPaint( pWnd );
break;
case WM_LBUTTONDOWN:
point.x = LOWORD(lParam);
point.y = HIWORD(lParam);
return OnLButtonDown( pWnd, 0, point );
break;
case WM_LBUTTONUP:
point.x = LOWORD(lParam);
point.y = HIWORD(lParam);
return OnLButtonUp( pWnd, 0, point );
break;
case WM_LBUTTONDBLCLK:
point.x = LOWORD(lParam);
point.y = HIWORD(lParam);
return OnLButtonDblClk( pWnd, 0, point );
break;
case WM_MOUSEMOVE:
point.x = LOWORD(lParam);
point.y = HIWORD(lParam);
return OnMouseMove( pWnd, 0, point );
break;
default:
break;
}
return CallWindowProc( m_cWndProc, hWnd, message, wParam, lParam );
}
static LRESULT OnLButtonDown( CWnd *pWnd, UINT nFlags, CPoint point ) {
m_nStatus = STATUS_BUTTON_DOWN;
pWnd->Invalidate();
pWnd->UpdateWindow();
return TRUE;
}
static LRESULT OnLButtonUp( CWnd *pWnd, UINT nFlags, CPoint point ) {
if( m_nStatus != STATUS_BUTTON_NORMAL ) {
m_nStatus = STATUS_BUTTON_NORMAL;
pWnd->Invalidate();
pWnd->UpdateWindow();
SendMessage( pWnd->GetParent()->m_hWnd,
WM_COMMAND,
pWnd->GetDlgCtrlID(),
(LPARAM) (pWnd->m_hWnd) );
}
return TRUE;
}
static LRESULT OnLButtonDblClk( CWnd *pWnd, UINT nFlags, CPoint point ) {
return TRUE;
}
static LRESULT OnMouseMove( CWnd *pWnd, UINT nFlags, CPoint point ) {
HRGN hRgn = CreateRectRgn( 0, 0, 0, 0 );
pWnd->GetWindowRgn( hRgn );
BOOL bIn = PtInRegion( hRgn, point.x, point.y );
if( bIn ) {
if( m_nStatus == STATUS_BUTTON_DOWN ) return TRUE;
if( m_nStatus != STATUS_BUTTON_HOVER ) {
m_nStatus = STATUS_BUTTON_HOVER;
pWnd->Invalidate();
pWnd->UpdateWindow();
pWnd->SetCapture();
}
} else {
if ( m_nStatus == STATUS_BUTTON_HOVER ) {
m_nStatus = STATUS_BUTTON_NORMAL;
pWnd->Invalidate();
pWnd->UpdateWindow();
ReleaseCapture();
}
}
DeleteObject( hRgn );
return TRUE;
}
static LRESULT OnPaint( CWnd *pWnd ) {
CPaintDC dc(pWnd);
CString cs;
RECT rc;
CFont Font;
CFont *pOldFont;
CBrush Brush;
CBrush *pOldBrush;
CPen Pen;
CPen *pOldPen;
POINT pt;
pt.x = 2;
pt.y = 2;
dc.SetBkMode( TRANSPARENT );
Font.CreateFont( 12, 0, 0, 0, FW_HEAVY, 0, 0, 0, ANSI_CHARSET, \
OUT_TT_PRECIS, CLIP_DEFAULT_PRECIS, DEFAULT_QUALITY, \
VARIABLE_PITCH | FF_SWISS, "MS Sans Serif" );
pOldFont = dc.SelectObject( &Font );
if( m_nStatus == STATUS_BUTTON_DOWN ) {
Brush.CreateSolidBrush( RGB( 160, 160, 160 ) );
Pen.CreatePen( PS_SOLID, 1, RGB( 100, 100, 100 ) );
dc.SetTextColor( RGB( 50, 50, 250 ) );
} else if( m_nStatus == STATUS_BUTTON_HOVER ) {
Brush.CreateSolidBrush( RGB( 60, 60, 180 ) );
Pen.CreatePen( PS_SOLID, 1, RGB( 0, 0, 0 ) );
dc.SetTextColor( RGB( 250, 250, 50 ) );
} else if( m_nStatus == STATUS_BUTTON_NORMAL ) {
Brush.CreateSolidBrush( RGB( 240, 240, 240 ) );
Pen.CreatePen( PS_SOLID, 1, RGB( 120, 120, 120 ) );
dc.SetTextColor( RGB( 50, 50, 50 ) );
}
pOldBrush = dc.SelectObject( &Brush );
pOldPen = dc.SelectObject( &Pen );
pWnd->GetClientRect( &rc );
dc.RoundRect( &rc, pt );
HRGN hRgn = CreateRectRgn( rc.left, rc.top, rc.right, rc.bottom );
pWnd->SetWindowRgn( hRgn, TRUE );
DeleteObject( hRgn );
pWnd->GetWindowText( cs );
dc.DrawText( cs, &rc, DT_CENTER | DT_VCENTER | DT_SINGLELINE );
dc.SelectObject( pOldFont );
dc.SelectObject( pOldBrush );
dc.SelectObject( pOldPen );
return TRUE;
}
static LRESULT OnEraseBkgnd( CWnd *pWnd, CDC *pDC ) {
return TRUE;
}
};
UINT CButtonExt::m_nStatus = STATUS_BUTTON_NORMAL;
WNDPROC CButtonExt::m_cWndProc = NULL
程序结构还是很清楚的，这时做一些简单的说明。m_nStatus用来标志按钮的状态，m_cWndProc用来保存系统的消息处理函数地址。其他就不用说了吧。
最后，就是如何在程序中使用的问题了。调用方法其实很简单，在CSkinApp类的InitInstance()函数中加入这样的一句话：
IRStartup( GetModuleHandle( NULL ), GetCurrentThreadId() );在CSkinApp类的ExitInstance()中加入这样的一句话：
IRComplete();这样就实现了对按钮的换肤，是不是很简单啊，我只是做了一个简单的实现，还有很多工作需要大家一起来做，希望有兴趣的朋友一起来做，有什么问题请到 上发问，同时也希望大家把你们的作品公布出来，SkinDemo的开发网站就在，发布你的后继开发，贴出你的心得。 下载本文示例代码