取色工具源码

    自己写的一款取色工具，源码如下：

  1 // -----------------------------------------------------
  2 // 函数名  : CCatchColorDlg::OnBnClickedButtonCatchcolor
  3 // 函数功能: 取色事件
  4 // 输入参数: 
  5 // 输出参数: 
  6 // 返回值  : 
  7 // -----------------------------------------------------
  8 void CCatchColorDlg::OnBnClickedButtonCatchcolor()
  9 {
 10     // 鼠标状态为左键按下
 11     mouse_event(MOUSEEVENTF_LEFTDOWN, 0, 0, 0, 0);
 12 
 13     // 设置鼠标的形状
 14     m_hPoint =  AfxGetApp()->LoadCursor(IDC_CURSOR1);
 15     ::SetCursor(m_hPoint);
 16     InitAll(FALSE);
 17     
 18 }
 19 
 20 void CCatchColorDlg::OnEnChangeEditRgb()
 21 {
 22     UpdateData();
 23 
 24     // 如果是系统取色
 25     if (CatchColorMode_System == m_iCurrentMode) 
 26     {
 27         if (m_strRgb.IsEmpty()) 
 28         {
 29             m_strHex.Empty();
 30         } 
 31         else 
 32         {
 33             int nIndex = m_strRgb.Find(",");
 34             int nIndexTmp = 0;
 35             CString strRed;
 36             CString strGreen;
 37             CString strBlue;
 38             strRed.Empty();
 39             strGreen.Empty();
 40             strRed.Empty();
 41             while (-1 != nIndex && 0 != nIndex) 
 42             {
 43                 if(strRed.IsEmpty()) 
 44                 {
 45                     strRed = m_strRgb.Left(nIndex);
 46                 } 
 47                 else if (strGreen.IsEmpty()) 
 48                 {
 49                     strGreen = m_strRgb.Mid(nIndexTmp + 1, nIndex - nIndexTmp - 1);
 50                     strBlue = m_strRgb.Right(m_strRgb.GetLength() - nIndex - 1);
 51                 } 
 52                 else 
 53                 {
 54                     m_strHex.Empty();
 55                     break;
 56                 }
 57                 nIndexTmp = nIndex;
 58                 nIndex = m_strRgb.Find(_T(","), (nIndex + 1));
 59             }
 60 
 61             // RGB编辑框是否不为空
 62             BOOL bRgbNotEmpty = (!strRed.IsEmpty()) 
 63                                 && (!strBlue.IsEmpty())
 64                                 && (!strGreen.IsEmpty());
 65             if (bRgbNotEmpty) 
 66             {
 67                 // 是否是不合法的RGB值
 68                 BOOL bNotValidRGB = (!CheckRGB(atoi(strRed)))
 69                                     || (!CheckRGB(atoi(strGreen)))
 70                                     || (!CheckRGB(atoi(strBlue)));
 71                 if (bNotValidRGB) 
 72                 {
 73                         m_strHex.Empty();
 74                 } 
 75                 else 
 76                 {
 77                     m_strHex.Format(_T("#%02X%02X%02X"), atoi(strRed), atoi(strGreen), atoi(strBlue));
 78                     m_Color = RGB(atoi(strRed), atoi(strGreen), atoi(strBlue));
 79                 }
 80             }
 81             GetDlgItem(IDC_STATIC_COLOR)->RedrawWindow();
 82             UpdateData(FALSE);
 83         }
 84     }
 85     UpdateData(FALSE);
 86     GetDlgItem(IDC_STATIC_COLOR)->RedrawWindow();
 87 }
 88 
 89 void CCatchColorDlg::OnEnChangeEditHex()
 90 {
 91     UpdateData();
 92 
 93     if (CatchColorMode_System == m_iCurrentMode) 
 94     {
 95         if (m_strHex.IsEmpty() 
 96             || MaxHexWidth != m_strHex.GetLength()
 97             || HEX_FLAG != m_strHex.Left(strlen(HEX_FLAG))) 
 98         {
 99             return;
100         }
101         else 
102         {
103             int iHex = 0;
104             int iLength = m_strHex.GetLength();
105 
106             char* pstrHex = NULL;
107             pstrHex = (char*)malloc(sizeof(char)*(iLength + 1));
108             memset(pstrHex, 0, (iLength + 1));
109             memcpy(pstrHex, (LPCTSTR)m_strHex, iLength);
110 
111             char* pHex = NULL;
112             pHex = &pstrHex[1];
113             iHex = strtol(pHex, NULL, 16);
114 
115             int iRed = 0, iGreen = 0, iBule = 0;
116             ChangeHexToRGB(iHex, iRed, iGreen, iBule);
117             m_strRgb.Format(_T("%d, %d, %d"),iRed, iGreen, iBule);
118 
119             free(pstrHex);
120             pstrHex = NULL;
121 
122             m_Color = RGB(iRed, iGreen, iBule);
123             GetDlgItem(IDC_STATIC_COLOR)->RedrawWindow();
124             UpdateData(FALSE);
125         }
126     }
127 }
128 
129 BOOL CCatchColorDlg::CheckRGB(int color)
130 {
131     return ((MinRGBValue <= color) && (MaxRGBValue >= color));
132 }
133 
134 
135 void CCatchColorDlg::GetCurrentColor()
136 {
137     UpdateData();
138 
139     // 如果是屏幕取色
140     if (CatchColorMode_Screen == m_iCurrentMode) 
141     {
142         HDC hDC = ::GetDC(NULL);
143         CPoint pt; 
144         GetCursorPos(&pt); 
145         COLORREF clr = ::GetPixel(hDC,pt.x,pt.y);
146 
147         CString ClrText; 
148         m_strRgb.Format( _T("(%d,%d,%d)"), GetRValue(clr), GetGValue(clr), GetBValue(clr));
149         m_strHex.Format(_T("#%02X%02X%02X"), GetRValue(clr), GetGValue(clr), GetBValue(clr));
150 
151         ::ReleaseDC(NULL, hDC);
152         m_Color = clr;
153         GetDlgItem(IDC_STATIC_COLOR)->RedrawWindow();
154 
155         UpdateData(FALSE);
156     }
157     
158 }
159 
160 void CCatchColorDlg::SetCurrentColor()
161 {
162     ReleaseCapture();
163     m_iCurrentMode = CatchColorMode_System;
164     SetClipboard(m_strHex);
165     CString strMeg;
166     strMeg.Empty();
167     strMeg.Format(_T("%s已经被保存到剪贴板上了."), m_strHex);
168     MessageBox(strMeg, _T("取色"), MB_OK|MB_ICONINFORMATION);
169     InitAll(TRUE);
170 }
171 
172 BOOL CCatchColorDlg::SetClipboard(CString strText)
173 {
174     if (!OpenClipboard())
175     {
176         return FALSE;
177     }
178 
179     EmptyClipboard();
180     int iLength = strText.GetLength();
181     HGLOBAL hglbCopy;
182     LPTSTR  lptstrCopy; 
183     hglbCopy = GlobalAlloc(GMEM_MOVEABLE, 
184             (iLength + 1) * sizeof(char)); 
185 
186     if (NULL == hglbCopy) 
187     { 
188         CloseClipboard(); 
189         return FALSE; 
190     }
191 
192     lptstrCopy = (LPTSTR)GlobalLock(hglbCopy);
193     memcpy(lptstrCopy, (LPCTSTR)strText, iLength);
194     GlobalUnlock(hglbCopy); 
195     SetClipboardData(CF_TEXT, hglbCopy);
196     CloseClipboard();
197     return TRUE; 
198 }
199 
200 void CCatchColorDlg::ChangeHexToRGB(int iHex, int& iRed, int& iGreen, int& iBlue)
201 {
202     iRed = ( 0xff <<16 & iHex ) >> 16;
203     iGreen = ( 0xff <<8 & iHex ) >> 8;
204     iBlue =0xff & iHex;
205 
206 }
207 void CCatchColorDlg::OnBnClickedButtonCatchsyscolor()
208 {
209     m_iCurrentMode = CatchColorMode_System;
210 
211     CColorDialog colorDlg;
212     if (IDOK == colorDlg.DoModal()) 
213     {
214         COLORREF clr = colorDlg.GetColor();
215         CString ClrText; 
216         m_strRgb.Format(_T("(%d,%d,%d)"), GetRValue(clr), GetGValue(clr) ,GetBValue(clr));
217         m_strHex.Format(_T("#%02X%02X%02X"), GetRValue(clr), GetGValue(clr), GetBValue(clr));
218         m_Color = clr;
219 
220         UpdateData(FALSE);
221 
222         CString strMeg;
223         strMeg.Empty();
224 
225         if (SetClipboard(m_strHex))
226         {
227             strMeg.Format(_T("%s已被成功拷贝到剪贴板上了"),m_strHex);
228         }
229         else
230         {
231             strMeg.Format(_T("%s无法拷贝到剪贴板上"));
232         }
233         MessageBox(strMeg, _T("成功"), MB_OK | MB_ICONINFORMATION);
234         GetDlgItem(IDC_STATIC_COLOR)->RedrawWindow();
235     }
236     else 
237     {
238         return;
239     }
240 }
241 
242 
243 HBRUSH CCatchColorDlg::OnCtlColor(CDC* pDC, CWnd* pWnd, UINT nCtlColor)
244 {
245     HBRUSH hbr = CDialog::OnCtlColor(pDC, pWnd, nCtlColor);
246 
247     // 如果是颜色静态文本框
248     if(IDC_STATIC_COLOR == pWnd->GetDlgCtrlID())
249     {
250         pDC->SetBkMode(TRANSPARENT);
251         m_brush.Detach();
252         m_brush.CreateSolidBrush(m_Color);
253         pDC->SelectObject(&m_brush);
254         hbr = m_brush;
255     } 
256     else if (CTLCOLOR_STATIC == nCtlColor 
257              && IDC_STATIC_COLOR != pWnd->GetDlgCtrlID()) 
258     {
259         pDC->SetBkMode(TRANSPARENT);
260         pDC->SetTextColor(RGB(0, 0, 0));
261         pDC->SetBkColor(DEFAULT_COLOR);
262         hbr = m_TextBrush;
263     }
264     return hbr;
265 }
266 
267 void CCatchColorDlg::OnLButtonDown(UINT nFlags, CPoint point)
268 {
269     
270     UpdateData();
271 
272     // 如果是屏幕取色模式，鼠标左键按下，则取色
273     if (CatchColorMode_Screen == m_iCurrentMode)
274     {
275         GetCurrentColor();
276     }
277     // 如果不是屏幕取色模式，鼠标左键按下，则移动对话框
278     else
279     {
280         PostMessage(WM_NCLBUTTONDOWN, HTCAPTION, MAKELPARAM(point.x, point.y)); 
281     }
282 
283     CDialog::OnLButtonDown(nFlags, point);
284     
285 }
286 
287 void CCatchColorDlg::InitAll(BOOL bEnable)
288 {
289     GetDlgItem(IDC_BUTTON_CATCHSYSCOLOR)->EnableWindow(bEnable);
290     GetDlgItem(IDC_BUTTON_GETVERSION)->EnableWindow(bEnable);
291 
292     if (!bEnable) 
293     {
294         m_iCurrentMode = CatchColorMode_Screen;
295         SetCapture();
296     }
297 }
298 
299 void CCatchColorDlg::OnLButtonUp(UINT nFlags, CPoint point)
300 {
301     // 如果当前模式是屏幕取色模式，鼠标左键松开，则取色，并显示
302     if (CatchColorMode_Screen == m_iCurrentMode) 
303     {
304         GetCurrentColor();
305         SetCurrentColor();
306     }
307 
308     CDialog::OnLButtonUp(nFlags, point);
309 }
310 
311 void CCatchColorDlg::OnMouseMove(UINT nFlags, CPoint point)
312 {
313     // 鼠标移动，取色
314     GetCurrentColor();
315 
316     CDialog::OnMouseMove(nFlags, point);
317 }
318 
319 BOOL CCatchColorDlg::OnSetCursor(CWnd* pWnd, UINT nHitTest, UINT message)
320 {
321     if (HTNOWHERE == nHitTest) 
322     {
323         // 如果是屏幕取色模式，设置鼠标的形状为取色工具图标
324         if (CatchColorMode_Screen == m_iCurrentMode) 
325         {
326             ::SetCursor(m_hPoint);
327             return TRUE;
328         }
329     }
330 
331     return CDialog::OnSetCursor(pWnd, nHitTest, message);
332 }
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原文地址：https://www.cnblogs.com/ahcc08/p/3692980.html