自定义编辑框VC,可加载更改字体，添加背景图片，显示输入提示信息

 1 #pragma once
 2 
 3 #include "AdvEdit.h"
 4 // CBkgEditBox
 5 
 6 class CBkgEditBox : public CEdit
 7 {
 8     DECLARE_DYNAMIC(CBkgEditBox)
 9 
10 public:
11     CBkgEditBox();
12     virtual ~CBkgEditBox();
13 
14 protected:
15     DECLARE_MESSAGE_MAP()
16 public:
17     afx_msg BOOL OnEraseBkgnd(CDC* pDC);
18     afx_msg void OnSetFocus(CWnd* pOldWnd);
19     afx_msg void OnMouseHover(UINT nFlags, CPoint point);
20     afx_msg void OnMouseLeave();
21     afx_msg void OnMouseMove(UINT nFlags, CPoint point);
22     afx_msg HBRUSH OnCtlColor(CDC* pDC, CWnd* pWnd, UINT nCtlColor);
23     afx_msg HBRUSH CtlColor(CDC* pDC, UINT nCtlColor);
24     afx_msg void OnChar(UINT nChar, UINT nRepCnt, UINT nFlags);
25     afx_msg void OnKillFocus(CWnd* pNewWnd);
26     
27 private:
28     BOOL m_bFirstDraw;          // 第一次绘制背景标识 
29     Gdiplus::Image *m_pPngBg;   // 背景位图资源
30     BOOL m_bHover;              // 鼠标是否在编辑框上标识
31     BOOL m_bAllowMouseTrack;    // 鼠标移动时是否允许追踪鼠标移动     
32     COLORREF m_clrBkgnd;        // 默认背景Hover颜色
33     COLORREF m_clrHoverBkgnd;   // 默认背景UnHover颜色
34     COLORREF m_clrText;         // 字体颜色
35     CString  m_strTipStr;       // 输入提示信息
36     CBrush   m_brhNull;         // 空画刷对象
37     CFont*   m_pTextFont;       // 编辑框字体
38     
39 public:
40     BOOL SetBackgndRes( UINT nResourceID, LPCTSTR lpszType=_T("PNG"));
41     void SetGrayTipString(LPCTSTR lpszTipString);
42     void SetTextColor(COLORREF clrText);
43     BOOL SetTextFont(int nHeight = 18, int nWidth = 10, LPCTSTR lpszFaceName = _T("宋体"));
44   BOOL IsEditEmpty();
45 };

  1 // MyEditBox.cpp : 实现文件
  2 //
  3 
  4 #include "stdafx.h"
  6 #include "BkgEditBox.h"
  7 
  8 
  9 // CBkgEditBox
 10 
 11 IMPLEMENT_DYNAMIC(CBkgEditBox, CEdit)
 12 
 13 CBkgEditBox::CBkgEditBox()
 14 {
 15     m_bFirstDraw = TRUE;
 16     m_pPngBg     = NULL;
 17     m_bHover     = FALSE;
 18     m_bAllowMouseTrack = TRUE;
 19 
 20     m_clrBkgnd      = RGB(255,255,255);
 21     m_clrHoverBkgnd = RGB(255,255,255);
 22     m_clrText       = RGB(0,0,0);
 23     m_strTipStr = _T("");
 24 
 25     m_brhNull.CreateStockObject(NULL_BRUSH);
 26     m_pTextFont = NULL;
 27 }
 28 
 29 CBkgEditBox::~CBkgEditBox()
 30 {
 31     if (NULL != m_pTextFont)
 32     {
 33         delete m_pTextFont;
 34         m_pTextFont = NULL;
 35     }
 36 }
 37 
 38 
 39 BEGIN_MESSAGE_MAP(CBkgEditBox, CEdit)
 40     ON_WM_ERASEBKGND()
 41     ON_WM_SETFOCUS()
 42     ON_WM_MOUSEHOVER()
 43     ON_WM_MOUSELEAVE()
 44     ON_WM_MOUSEMOVE()
 45     ON_WM_CTLCOLOR()
 46     ON_WM_CTLCOLOR_REFLECT()
 47     ON_WM_CHAR()
 48     ON_WM_KILLFOCUS()
 49 END_MESSAGE_MAP()
 50 
 51 
 52 
 53 // CBkgEditBox 消息处理程序
 54 
 55 
 56 
 57 
 58 BOOL CBkgEditBox::OnEraseBkgnd(CDC* pDC)
 59 {
 60     // 图片背景与编辑框的距离顶点
 61     int nLeftStep,nTopStep,nWidthStep,nHeightStep;
 62     nLeftStep = 1;
 63     nTopStep  = 5;
 64     nWidthStep  = 2;
 65     nHeightStep = 8;
 66     CDC* pOldDC = pDC;
 67     if (NULL != m_pPngBg)
 68     {
 69         pDC = GetParent()->GetDC();
 70         CRect rect;
 71         GetWindowRect(&rect);
 72         this->GetParent()->ScreenToClient(&rect);
 73 
 74         int nWidth  = m_pPngBg->GetWidth();
 75         int nHeight = m_pPngBg->GetHeight();
 76 
 77         // 不是第一次绘制时需要调整位置
 78         if (!m_bFirstDraw)
 79         {
 80             rect.left -= nLeftStep;
 81             rect.top  -= nTopStep;
 82         }else
 83         {
 84             MoveWindow(rect.left + nLeftStep, rect.top + nTopStep,
 85                 nWidth - nWidthStep, nHeight - nHeightStep);
 86         }
 87 
 88 
 89         CDC MemDc;
 90         MemDc.CreateCompatibleDC(pDC);
 91 
 92         CBitmap bitMemMap;
 93         bitMemMap.CreateCompatibleBitmap(pDC, nWidth, nHeight);
 94         MemDc.SelectObject(&bitMemMap);
 95 
 96         Gdiplus::Graphics graphics(MemDc.m_hDC);
 97         graphics.DrawImage(m_pPngBg, 0, 0, nWidth, nHeight);
 98         pDC->BitBlt(rect.left, rect.top, nWidth,nHeight, &MemDc, 0, 0,SRCCOPY);
 99     
100         bitMemMap.DeleteObject();
101         MemDc.DeleteDC(); 
102         m_bFirstDraw = FALSE;
103 
104         pDC = pOldDC;
105     }
106 
107 
108     
109     {
110     
111         // 内阴影
112         CBrush brhInnerShadow;
113         if (!m_bHover)
114         {
115             brhInnerShadow.CreateSolidBrush(m_clrBkgnd);
116         }else
117         {
118             brhInnerShadow.CreateSolidBrush(m_clrHoverBkgnd);
119         }
120         
121 
122         CBrush* pOldBrh = pDC->SelectObject(&brhInnerShadow);
123         pDC->SelectStockObject(NULL_PEN);
124         CRect rcShadow;
125         GetClientRect(&rcShadow);
126         if (NULL != m_pPngBg)
127         {
128             rcShadow.right  = rcShadow.left + m_pPngBg->GetWidth() - nWidthStep;
129             rcShadow.bottom = rcShadow.top + m_pPngBg->GetHeight() - nHeightStep;
130         }
131         pDC->Rectangle(&rcShadow);
132         if(NULL!=pOldBrh)
133         {
134             pDC->SelectObject(pOldBrh);
135         }
136         brhInnerShadow.DeleteObject();
137         this->UpdateWindow();
138 
139     }
140 
141     return CEdit::OnEraseBkgnd(pDC);
142 }
143 
144 BOOL CBkgEditBox::SetBackgndRes( UINT nResourceID, LPCTSTR lpszType/*=_T("PNG")*/ )
145 {
146     return G_ImageFromIDResource(nResourceID, lpszType, m_pPngBg);
147 }
148 
149 
150 void CBkgEditBox::OnMouseHover(UINT nFlags, CPoint point)
151 {
152     m_bHover = TRUE;
153     Invalidate();
154 
155     CEdit::OnMouseHover(nFlags, point);
156 }
157 
158 
159 void CBkgEditBox::OnMouseLeave()
160 {
161     // Hover结束
162     m_bHover = FALSE;
163     // 重绘背景
164     Invalidate();
165 
166     // 鼠标离开，继续追踪HOVER消息
167     m_bAllowMouseTrack = TRUE;
168 
169     //CWnd* pWnd =this->GetParent();
170 
171     //CRect rcTmp;
172     //GetClientRect(rcTmp);
173     //rcTmp.OffsetRect(3, 3);
174     ////InvalidateRect(rcTmp);
175     //this->ClientToScreen(&rcTmp);
176     //pWnd->ScreenToClient(&rcTmp);
177     //pWnd->InvalidateRect(&rcTmp);
178     //pWnd->UpdateWindow();
179 
180 
181 
182     CEdit::OnMouseLeave();
183 }
184 
185 
186 void CBkgEditBox::OnMouseMove(UINT nFlags, CPoint point)
187 {
188     // 默认情况下，窗口是不响应 WM_MOUSELEAVE 和 WM_MOUSEHOVER 消息的，
189     // 所以要使用 _TrackMouseEvent 函数来激活这两个消息
190     // https://msdn.microsoft.com/en-us/library/ms645604
191 
192     if (m_bAllowMouseTrack)
193     {
194         TRACKMOUSEEVENT tme;
195         tme.cbSize      = sizeof(TRACKMOUSEEVENT);
196         tme.dwFlags     = TME_HOVER|TME_LEAVE;
197         tme.hwndTrack   = m_hWnd;
198         tme.dwHoverTime = 10; // 超过10ms才会认为HOVER
199 
200         _TrackMouseEvent(&tme);
201         m_bAllowMouseTrack = FALSE;
202     }
203 
204     CEdit::OnMouseMove(nFlags, point);
205 }
206 
207 BOOL CBkgEditBox::IsEditEmpty()
208 {
209     CString strText;
210     GetWindowText(strText);
211     if (strText.IsEmpty())
212     {
213         return TRUE;
214     }
215     if (strText == m_strTipStr)
216     {
217         return TRUE;
218     }
219     return FALSE;
220 }
221 
222 
223 HBRUSH CBkgEditBox::OnCtlColor(CDC* pDC, CWnd* pWnd, UINT nCtlColor)
224 {
225     HBRUSH hbr = CEdit::OnCtlColor(pDC, pWnd, nCtlColor);
226 
227     // TODO:  在此更改 DC 的任何特性
228 
229     // TODO:  如果默认的不是所需画笔，则返回另一个画笔
230     
231     return hbr;
232 }
233 
234 HBRUSH CBkgEditBox::CtlColor( CDC* pDC, UINT nCtlColor )
235 {
236     // 设置透明背景
237     pDC->SetBkMode(TRANSPARENT);
238     
239     CString sText;
240     GetWindowText(sText);
241     if (sText == m_strTipStr)
242     {
243         pDC->SetTextColor(RGB(150,150,150));
244     }else
245     {
246         pDC->SetTextColor(m_clrText);
247     }
248 
249     return m_brhNull;
250 }
251 
252 
253 void CBkgEditBox::OnChar(UINT nChar, UINT nRepCnt, UINT nFlags)
254 {
255     Invalidate(TRUE);
256 
257     CEdit::OnChar(nChar, nRepCnt, nFlags);
258 }
259 
260 
261 void CBkgEditBox::OnSetFocus(CWnd* pOldWnd)
262 {
263     CEdit::OnSetFocus(pOldWnd);
264     
265     CString sText;
266     GetWindowText(sText);
267     if (sText == m_strTipStr)
268     {
269         SetWindowText(_T(""));
270     }
271     Invalidate(TRUE);
272     return ;
273     
274 }
275 void CBkgEditBox::OnKillFocus(CWnd* pNewWnd)
276 {
277     CEdit::OnKillFocus(pNewWnd);
278 
279     CString sText;
280     GetWindowText(sText);
281     if (_T("") == sText)
282     {
283         SetWindowText(m_strTipStr);
284     }
285 }
286 
287 void CBkgEditBox::SetGrayTipString( LPCTSTR lpszTipString )
288 {
289     m_strTipStr = lpszTipString;
290 
291     SetWindowText(lpszTipString);
292 }
293 
294 void CBkgEditBox::SetTextColor( COLORREF clrText )
295 {
296     m_clrText = m_clrText;
297 }
298 
299 // https://msdn.microsoft.com/zh-tw/library/vstudio/2ek64h34.aspx
300 BOOL CBkgEditBox::SetTextFont( int nHeight /*= 20*/, int nWidth /*= 12*/, LPCTSTR lpszFaceName /*= _T("宋体")*/ )
301 {
302     if (NULL != m_pTextFont)
303     {
304         delete m_pTextFont;
305         m_pTextFont = NULL;
306     }
307     m_pTextFont = new CFont;
308     m_pTextFont->CreateFont(
309         nHeight,                   // nHeight
310         nWidth,                    // nWidth
311         0,                         // nEscapement
312         0,                         // nOrientation
313         FW_NORMAL,                 // nWeight
314         FALSE,                     // bItalic
315         FALSE,                     // bUnderline
316         0,                         // cStrikeOut
317         ANSI_CHARSET,              // nCharSet
318         OUT_DEFAULT_PRECIS,        // nOutPrecision
319         CLIP_DEFAULT_PRECIS,       // nClipPrecision
320         DEFAULT_QUALITY,           // nQuality
321         DEFAULT_PITCH | FF_SWISS,  // nPitchAndFamily
322         lpszFaceName);
323 
324     this->SetFont(m_pTextFont);
325     return TRUE;
326 }