学步园

下面的类不是我写的，我只简单介绍一下用法：

1>将AtlBitmapSkinButton.h头文件导入到工程中；
2>添加#include "AtlBitmapSkinButton.h"头文件；
3>添加按钮控件IDC_BUTTON1，并将其Ower Draw属性改为True；
4>在

BEGIN_MSG_MAP(CDialog)
......
REFLECT_NOTIFICATIONS()//这句不要忘了！
END_MSG_MAP()
5>CAtlBitmapButton m_button1;
6>在OnInitDialog里面添加如下代码：
m_button1.SubclassWindow(GetDlgItem(IDC_BUTTON1));
m_button1.LoadStateBitmaps(IDB_BITMAP1, IDB_BITMAP2, IDB_BITMAP3);
IDB_BITMAP1:当前显示，IDB_BITMAP2:鼠标按下，IDB_BITMAP3:鼠标滑过

class CAtlBitmapButton;<br /> typedef CWindowImpl < CAtlBitmapButton, CWindow, CWinTraits < WS_CHILD | WS_VISIBLE | BS_OWNERDRAW> > CCustButton;</p> <p>class CAtlBitmapButton : public CCustButton<br /> {<br /> public:<br /> DECLARE_WND_SUPERCLASS(NULL, _T("BUTTON"))</p> <p> CAtlBitmapButton()<br /> {<br /> m_bButtonDown = m_bTracking = false;<br /> }</p> <p> ~CAtlBitmapButton()<br /> {<br /> }</p> <p> BEGIN_MSG_MAP(CAtlBitmapButton)<br /> MESSAGE_HANDLER(OCM_DRAWITEM, OnDrawItem)<br /> MESSAGE_HANDLER(WM_DESTROY, OnDestroy)<br /> MESSAGE_HANDLER(WM_ERASEBKGND, OnEraseBkgnd)<br /> MESSAGE_HANDLER(WM_LBUTTONDOWN, OnLButtonDown)<br /> MESSAGE_HANDLER(WM_LBUTTONUP, OnLButtonUP)<br /> MESSAGE_HANDLER(WM_MOUSEMOVE, OnMouseMove)<br /> MESSAGE_HANDLER(WM_MOUSELEAVE, OnMouseLeave)<br /> MESSAGE_HANDLER(WM_KILLFOCUS, OnKillFocus)<br /> END_MSG_MAP()</p> <p> LRESULT OnMouseLeave(UINT uMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled)<br /> {<br /> ATLASSERT(m_bTracking);<br /> m_bTracking = false;<br /> Invalidate();<br /> return 0;<br /> }<br /> LRESULT OnDrawItem(UINT uMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled)<br /> {<br /> // TODO : Add Code for message handler. Call DefWindowProc if necessary.<br /> LPDRAWITEMSTRUCT lpdis = (LPDRAWITEMSTRUCT)lParam;<br /> HDC hdcMem = ::CreateCompatibleDC(lpdis->hDC);<br /> HBITMAP hbmMem = ::CreateCompatibleBitmap(lpdis->hDC,<br /> lpdis->rcItem.right - lpdis->rcItem.left,<br /> lpdis->rcItem.bottom - lpdis->rcItem.top);</p> <p> HGDIOBJ hbmOld = ::SelectObject(hdcMem, (HGDIOBJ)hbmMem);<br /> HBRUSH transparent = CreateSolidBrush(GetSysColor(COLOR_BTNFACE));<br /> RECT rect={lpdis->rcItem.left, lpdis->rcItem.top, lpdis->rcItem .right, lpdis->rcItem.bottom };<br /> int cx = rect.right - rect.left;<br /> int cy = rect.bottom -rect.top;</p> <p> FillRect(hdcMem , &rect, transparent);</p> <p> POINT mouse_position;<br /> if ((m_bButtonDown) &&(::GetCapture() == m_hWnd) &&(::GetCursorPos(&mouse_position)))<br /> {<br /> if (::WindowFromPoint(mouse_position) == m_hWnd)<br /> {<br /> if ((GetState() & BST_PUSHED) != BST_PUSHED)<br /> {<br /> SetState(TRUE);<br /> return -1;<br /> }<br /> }<br /> else<br /> {<br /> if ((GetState() & BST_PUSHED) == BST_PUSHED)<br /> {<br /> SetState(FALSE);<br /> return -1;<br /> }<br /> }<br /> }</p> <p> if (lpdis->itemState & ODS_SELECTED)<br /> {<br /> if (!m_bmpDown)<br /> {<br /> FillRect(lpdis->hDC, &rect, CreateSolidBrush(GetSysColor(COLOR_BTNFACE)));<br /> }<br /> else<br /> DrawBitmap(lpdis->hDC, m_bmpDown, rect);<br /> }<br /> else<br /> {<br /> if (!m_bmpNormal)<br /> FillRect(lpdis->hDC, &rect, CreateSolidBrush(GetSysColor(COLOR_BTNFACE)));<br /> else<br /> {<br /> if ((m_bTracking) && m_bmpOver)<br /> DrawBitmap(lpdis->hDC, m_bmpOver, rect);<br /> else<br /> DrawBitmap(lpdis->hDC, m_bmpNormal, rect);<br /> }<br /> }</p> <p> ::SelectObject(hdcMem, hbmOld);<br /> ::DeleteObject((HGDIOBJ)hbmMem);<br /> ::DeleteDC(hdcMem);</p> <p> return 0;<br /> }</p> <p> public:</p> <p> LRESULT OnDestroy(UINT uMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled)<br /> {<br /> // TODO : Add Code for message handler. Call DefWindowProc if necessary.<br /> return 0;<br /> }</p> <p> LRESULT OnEraseBkgnd(UINT uMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled)<br /> {<br /> return 1;<br /> }</p> <p> LRESULT OnLButtonDown(UINT uMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled)<br /> {<br /> // TODO : Add Code for message handler. Call DefWindowProc if necessary.</p> <p> if (m_bTracking)<br /> {<br /> TRACKMOUSEEVENT t =<br /> {<br /> sizeof(TRACKMOUSEEVENT),<br /> TME_CANCEL | TME_LEAVE,<br /> m_hWnd,<br /> 0<br /> };<br /> if (::_TrackMouseEvent(&t))<br /> {<br /> m_bTracking = false;<br /> }<br /> }</p> <p> m_bButtonDown = true;</p> <p> bHandled = false;</p> <p> return 0;<br /> }<br /> LRESULT OnLButtonUP(UINT uMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled)<br /> {<br /> // TODO : Add Code for message handler. Call DefWindowProc if necessary.<br /> m_bButtonDown = false;<br /> bHandled = false;<br /> return 0;<br /> }</p> <p> LRESULT OnMouseMove(UINT uMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled)<br /> {<br /> // TODO : Add Code for message handler. Call DefWindowProc if necessary.<br /> if ((m_bButtonDown) &&(::GetCapture() == m_hWnd))<br /> {<br /> POINT p2;<br /> p2.x = LOWORD(lParam);<br /> p2.y = HIWORD(lParam);</p> <p> ::ClientToScreen(m_hWnd, &p2);<br /> HWND mouse_wnd = ::WindowFromPoint(p2);</p> <p> bool pressed = ((GetState() & BST_PUSHED) == BST_PUSHED);<br /> bool need_pressed = (mouse_wnd == m_hWnd);<br /> if (pressed != need_pressed)<br /> {<br /> SetState(need_pressed ? TRUE : FALSE);<br /> Invalidate();<br /> }<br /> }<br /> else<br /> {<br /> if (!m_bTracking)<br /> {<br /> TRACKMOUSEEVENT t =<br /> {<br /> sizeof(TRACKMOUSEEVENT),<br /> TME_LEAVE,<br /> m_hWnd,<br /> 0<br /> };<br /> if (::_TrackMouseEvent(&t))<br /> {<br /> m_bTracking = true;<br /> Invalidate();<br /> }<br /> }<br /> }<br /> bHandled = false;<br /> return 0;<br /> }</p> <p> int GetBitmapWidth(HBITMAP hBitmap)<br /> {<br /> BITMAP bm;<br /> GetObject(hBitmap, sizeof(BITMAP), (PSTR)&bm);<br /> return bm.bmWidth;<br /> }</p> <p> int GetBitmapHeight(HBITMAP hBitmap)<br /> {<br /> BITMAP bm;<br /> GetObject(hBitmap, sizeof(BITMAP), (PSTR)&bm);<br /> return bm.bmHeight;<br /> }</p> <p> void DrawBitmap(HDC hdc, HBITMAP hBitmap, RECT& rc)<br /> {<br /> if (!hBitmap)<br /> {<br /> ATLTRACE("/nUnable to load bitmap....");<br /> return;<br /> }</p> <p> int cx = rc.right - rc.left;<br /> int cy = rc.bottom - rc.top;</p> <p> int nbmpWidth= GetBitmapWidth(hBitmap);<br /> int nbmpHeight = GetBitmapHeight(hBitmap);<br /> HDC hdcMem = CreateCompatibleDC(hdc);<br /> SelectObject(hdcMem, hBitmap);</p> <p> StretchBlt(hdc, rc.left, rc.top, cx, cy, hdcMem, 0, 0, nbmpWidth, nbmpHeight, SRCCOPY);</p> <p> DeleteDC(hdcMem);<br /> }</p> <p> void LoadStateBitmaps(UINT nSelected, UINT nDown, UINT nOver)<br /> {<br /> if (m_bmpNormal)<br /> m_bmpNormal.DeleteObject();<br /> if (m_bmpDown)<br /> m_bmpDown.DeleteObject();<br /> if (m_bmpOver)<br /> m_bmpOver.DeleteObject();</p> <p> m_bmpNormal.LoadBitmap(nSelected);<br /> m_bmpDown.LoadBitmap(nDown);<br /> m_bmpOver.LoadBitmap(nOver);<br /> }</p> <p> UINT GetState() const<br /> {<br /> ATLASSERT(::IsWindow(m_hWnd));<br /> return (UINT)::SendMessage(m_hWnd, BM_GETSTATE, 0, 0L);<br /> }</p> <p> void SetState(BOOL bHighlight)<br /> {<br /> ATLASSERT(::IsWindow(m_hWnd));<br /> ::SendMessage(m_hWnd, BM_SETSTATE, bHighlight, 0L);<br /> } </p> <p>private:<br /> int m_nBorder;<br /> CBitmap m_bmpNormal, m_bmpDown, m_bmpOver;<br /> short m_DrawMode;<br /> BOOL m_bTracking;<br /> BOOL m_bButtonDown; </p> <p> LRESULT OnKillFocus(UINT uMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled)<br /> {<br /> // TODO : Add Code for message handler. Call DefWindowProc if necessary.<br /> if (::GetCapture() == m_hWnd)<br /> {<br /> ::ReleaseCapture();<br /> ATLASSERT(!m_bTracking);<br /> m_bButtonDown = false;<br /> ATLTRACE("/nKillFocus");<br /> }<br /> bHandled = false;<br /> return 0;<br /> }<br /> };

from: http://www.codeproject.com/KB/wtl/mousetrack.aspx