vc 按钮自绘

按钮自绘，将按钮区域分成三部分，左边、右边、中间都由贴图绘制，可用于手动进度条按钮，或者左右选择项按钮

cpp代码部分：

1. // LRSkinButton.cpp : implementation file
2. //
3. #include "stdafx.h"
4. #include "CRedrawButtonDemo.h"
5. #include "LRSkinButton.h"
6. #ifdef _DEBUG
7. #define new DEBUG_NEW
8. #undef THIS_FILE
9. static char THIS_FILE[] = __FILE__;
10. #endif
11. /////////////////////////////////////////////////////////////////////////////
12. // CLRSkinButton
13. CLRSkinButton::CLRSkinButton()
14. {
15. m_nWidth = 17;
16. m_nHeight = 16;
17. m_bDrawBorder = TRUE;
18. }
19. CLRSkinButton::~CLRSkinButton()
20. {
21. }
22. BEGIN_MESSAGE_MAP(CLRSkinButton, CButton)
23. //{{AFX_MSG_MAP(CLRSkinButton)
24. // NOTE - the ClassWizard will add and remove mapping macros here.
25. //}}AFX_MSG_MAP
26. ON_WM_CAPTURECHANGED()
27. ON_WM_MOUSEMOVE()
28. ON_WM_SETCURSOR()
29. ON_WM_KILLFOCUS()
30. END_MESSAGE_MAP()
31. void CLRSkinButton::DrawItem( LPDRAWITEMSTRUCT lpDrawItemStruct )
32. {
33. //  TRACE("DrawItem\n");
34. // TODO:  添加您的代码以绘制指定项
35. CDC* pDC = CDC::FromHandle(lpDrawItemStruct->hDC);
36. HDC hDC = pDC->GetSafeHdc();
37. // 按钮客户区域
38. CRect rectItem(lpDrawItemStruct->rcItem);
39. m_nHeight = rectItem.Height();
40. m_nWidth = 26;
41. CRect rectCenter(rectItem.left+m_nWidth, rectItem.top, rectItem.right-m_nWidth, rectItem.bottom);
42. CRect rectLeft(rectItem.left, rectItem.top, rectItem.left+m_nWidth, rectItem.top+m_nHeight);
43. CRect rectRight(rectItem.right-m_nWidth,rectItem.top,rectItem.right,rectItem.bottom);
44. static int nClrWidth = rectCenter.Width()/10;
45. CRect rectColor(rectCenter.left, rectCenter.top, rectCenter.left, rectCenter.bottom);
46. rectCenter.DeflateRect(0,1,0,1);
47. //  pDC->SetBkMode(TRANSPARENT);
48. HPEN hOldPen;
49. UINT action, state;
50. action = lpDrawItemStruct->itemAction;
51. state  = lpDrawItemStruct->itemState;
52. BOOL bIsPressed, bIsFocus, bIsDisabled;
53. bIsPressed = state & ODS_SELECTED;
54. bIsDisabled = state & ODS_DISABLED;
55. bIsFocus = (state & ODS_FOCUS) == ODS_FOCUS; // ::GetFocus() == m_hWnd;
56. ::SetBkColor(hDC, RGB(22, 33, 55));
57. // Draw pressed button
58. if (bIsPressed)
59. {// 按钮按下状态
60. /*
61. HPEN penBtnHiLight = CreatePen(PS_SOLID, 0, GetSysColor(COLOR_3DHILIGHT));//COLOR_3DLIGHT)); // Bianco
62. HPEN penBtnShadow = CreatePen(PS_SOLID, 0, GetSysColor(COLOR_3DSHADOW));   // Grigio scuro
63. // draw darkline of left-top conner
64. hOldPen = (HPEN)SelectObject(hDC,penBtnShadow);
65. MoveToEx(hDC,rectItem.left, rectItem.bottom-1,NULL);
66. LineTo(hDC,rectItem.left, rectItem.top);
67. LineTo(hDC,rectItem.right, rectItem.top);
68. // draw hilight line of right-bottom conner
69. SelectObject(hDC,penBtnHiLight);
70. MoveToEx(hDC,rectItem.left, rectItem.bottom-1,NULL);
71. LineTo(hDC,rectItem.right-1, rectItem.bottom-1);
72. LineTo(hDC,rectItem.right-1, rectItem.top-1);
73. //release resource
74. SelectObject(hDC,hOldPen);
75. DeleteObject(penBtnShadow);
76. DeleteObject(penBtnHiLight);
77. */
78. // 判断点击的是左区域还是右区域
79. POINT pos;
80. GetCursorPos( &pos );
81. ScreenToClient(&pos);
82. if (PtInRect( &rectLeft, pos))
83. {// 左键
84. TRACE(_T("Clicked Left...\n"));
85. nClrWidth -= 5;
86. if (nClrWidth <=0)
87. {
88. nClrWidth = 0;
89. }
90. }
91. if (PtInRect( &rectRight, pos))
92. {// 右键
93. TRACE(_T("Clicked Right...\n"));
94. nClrWidth += 5;
95. if (nClrWidth >= rectCenter.Width())
96. {
97. nClrWidth = rectCenter.Width();
98. }
99. }
100. }
101. else // ...else draw non pressed button
102. {
103. if(!m_bIsFlat || (m_bIsFlat && m_MouseOnButton))
104. {// 鼠标移动到按钮上面时的状态
105. /*
106. HPEN pen3DLight = CreatePen(PS_SOLID, 0, GetSysColor(COLOR_3DHILIGHT));//COLOR_3DLIGHT));       // Light gray
107. HPEN penBtnShadow = CreatePen(PS_SOLID, 0, GetSysColor(COLOR_3DSHADOW));   // Dark gray
108. // White line
109. hOldPen = (HPEN)SelectObject(hDC,pen3DLight);
110. MoveToEx(hDC,rectItem.left, rectItem.bottom-1,NULL);
111. LineTo(hDC,rectItem.left, rectItem.top);
112. LineTo(hDC,rectItem.right, rectItem.top);
113. // Dark gray line
114. SelectObject(hDC,penBtnShadow);
115. MoveToEx(hDC,rectItem.left, rectItem.bottom-1,NULL);
116. LineTo(hDC,rectItem.right-1, rectItem.bottom-1);
117. LineTo(hDC,rectItem.right-1, rectItem.top-1);
118. //
119. SelectObject(hDC,hOldPen);
120. DeleteObject(pen3DLight);
121. DeleteObject(penBtnShadow);
122. */
123. }
124. else{// FLAT 属性
125. if(m_bDrawBorder)
126. { // 失去焦点的时候绘制按钮边框
127. HPEN penBorder = CreatePen(PS_SOLID, 1, GetSysColor(COLOR_BTNTEXT));
128. hOldPen = (HPEN)SelectObject(hDC,penBorder);
129. SelectObject(hDC,GetStockObject(NULL_BRUSH));
130. // 绘制按钮边框
131. Rectangle(hDC,rectItem.left, rectItem.top, rectItem.right, rectItem.bottom);
132. SelectObject(hDC, hOldPen);
133. DeleteObject(penBorder);
134. }
135. }
136. }
137. //  if (lpDrawItemStruct->itemData != NULL)
138. //  {
139. // 画图标
140. CRect rect(rectCenter);
141. //  rect.DeflateRect(0,5,0,0); // 改变矩形范围
142. CDC dcMem;
143. dcMem.CreateCompatibleDC(pDC);
144. // 背景图
145. CBitmap bmp;
146. BITMAP bitmap;
147. bmp.LoadBitmap(m_nBmpBK);
148. bmp.GetBitmap( &bitmap );
149. CBitmap* pOldBmp = dcMem.SelectObject(&bmp);
150. pDC->StretchBlt(rectCenter.left, rectCenter.top, rectCenter.Width(), rectCenter.Height(), &dcMem, 0, 0, bitmap.bmWidth, bitmap.bmHeight, SRCCOPY);
151. bmp.DeleteObject();
152. // 左按钮图
153. bmp.LoadBitmap( m_nBmpLeft );
154. dcMem.SelectObject( &bmp );
155. bmp.GetBitmap( &bitmap );
156. //  pDC->BitBlt(rectLeft.left,rectLeft.top,rectLeft.Width(),rectLeft.Height(),&dcMem,0,0,SRCCOPY);
157. pDC->StretchBlt(rectLeft.left, rectLeft.top, rectLeft.Width(), rectLeft.Height(), &dcMem, 0, 0, bitmap.bmWidth, bitmap.bmHeight, SRCCOPY);
158. bmp.DeleteObject();
159. // 右按钮图
160. bmp.LoadBitmap( m_nBmpRight );
161. bmp.GetBitmap( &bitmap );
162. dcMem.SelectObject( &bmp );
163. //  pDC->BitBlt(rectRight.left,rectRight.top,rectRight.Width(),rectRight.Height(),&dcMem,0,0,SRCCOPY);
164. pDC->StretchBlt(rectRight.left, rectRight.top, rectRight.Width(), rectRight.Height(), &dcMem, 0, 0, bitmap.bmWidth, bitmap.bmHeight, SRCCOPY);
165. bmp.DeleteObject();
166. dcMem.SelectObject(pOldBmp);
167. // 绘制颜色进度条
168. bmp.LoadBitmap(IDB_BMP_BTNLEFT);
169. //  CBrush brush(&bmp);   //RGB(255, 255, 0)
170. CBrush brush(RGB(255, 255, 0));   //
171. rectColor.right = rectColor.left+nClrWidth;
172. pDC->FillRect(rectColor, &brush);
173. //      CBrush *pOldBrush = (CBrush*)pDC->SelectObject(&brush);
174. //      pDC->Rectangle(&rectColor);
175. //      pDC->SelectObject(pOldBrush);
176. bmp.DeleteObject();
177. // 绘制文字
178. rect = rectCenter;
179. //  rect.DeflateRect(0,5,0,0);  // 调整矩形大小
180. rect.InflateRect(0,1,0,1);
181. pDC->SetTextColor(RGB(0,0,0));
182. //      rect.OffsetRect(2,1); // 平行移动矩形位置
183. //  char zsCaption[64] = {0};
184. CString str;
185. GetWindowText( str );
186. COLORREF clr = GetSysColor( COLOR_3DHILIGHT);
187. clr = RGB(55, 155, 55);
188. if (bIsPressed)
189. {
190. clr = RGB(155, 55, 55);
191. }
192. else if (bIsFocus /*|| m_MouseOnButton*/)
193. {
194. clr = RGB(55, 55, 155);
195. HPEN penBorder = CreatePen(PS_SOLID, 1, RGB(255,0,255));
196. hOldPen = (HPEN)SelectObject(hDC,penBorder);
197. SelectObject(hDC,GetStockObject(NULL_BRUSH));
198. // 绘制按钮边框
199. Rectangle(hDC,rect.left, rect.top, rect.right, rect.bottom);
200. SelectObject(hDC, hOldPen);
201. DeleteObject(penBorder);
202. }
203. pDC->SetBkColor(clr);
204. pDC->SetTextColor( RGB(255, 0, 0) );
205. pDC->DrawText(str, str.GetLength(),rect, DT_CENTER | DT_VCENTER| DT_SINGLELINE);
206. //  }
207. }
208. void CLRSkinButton::SetBtnBmps( UINT uBmpBK, UINT uBmpLeft, UINT uBmpRight )
209. {
210. m_nBmpBK = uBmpBK;
211. m_nBmpLeft = uBmpLeft;
212. m_nBmpRight = uBmpRight;
213. }
214. void CLRSkinButton::PreSubclassWindow()
215. {
216. UINT nBS = GetButtonStyle();
217. if(nBS & BS_DEFPUSHBUTTON)
218. m_bDefaultBtn = TRUE;
219. else
220. m_bDefaultBtn = FALSE;
221. SetButtonStyle(nBS | BS_OWNERDRAW);
222. CButton::PreSubclassWindow();
223. }
224. /////////////////////////////////////////////////////////////////////////////
225. // CLRSkinButton message handlers
226. void CLRSkinButton::OnCaptureChanged(CWnd *pWnd)
227. {
228. if(m_MouseOnButton == TRUE)
229. {
230. ReleaseCapture();
231. Invalidate();
232. }
233. CButton::OnCaptureChanged(pWnd);
234. }
235. void CLRSkinButton::OnMouseMove(UINT nFlags, CPoint point)
236. {
237. CButton::OnMouseMove(nFlags, point);
238. HWND hParent; // Finestra che contiene il bottone
239. // If the mouse enter the button with the left button pressed then do nothing
240. if (nFlags & MK_LBUTTON && !m_MouseOnButton)
241. return;
242. // If our button is not flat then do nothing
243. if (m_bIsFlat)
244. {
245. hParent = ::GetParent(m_hWnd);
246. if ((::GetCapture() != m_hWnd) &&   (hParent != NULL))
247. {
248. m_MouseOnButton = TRUE;
249. SetCapture();
250. Invalidate();
251. }
252. else
253. {
254. RECT rc;
255. GetClientRect(&rc);
256. if (!PtInRect(&rc,point))
257. {
258. // Redraw only if mouse goes out
259. if (m_MouseOnButton == TRUE)
260. {
261. m_MouseOnButton = FALSE;
262. Invalidate();
263. }
264. // If user is NOT pressing left button then release capture!
265. if (!(nFlags & MK_LBUTTON))
266. ReleaseCapture();
267. }
268. }
269. }
270. }
271. BOOL CLRSkinButton::OnSetCursor(CWnd* pWnd, UINT nHitTest, UINT message)
272. {
273. if (m_hBtnCursor != NULL)
274. {
275. ::SetCursor(m_hBtnCursor);
276. return TRUE;
277. }
278. return CButton::OnSetCursor(pWnd, nHitTest, message);
279. }
280. void CLRSkinButton::OnKillFocus(CWnd* pNewWnd)
281. {
282. CButton::OnKillFocus(pNewWnd);
283. if(!m_bIsFlat)
284. {
285. m_MouseOnButton = FALSE;
286. Invalidate();
287. }
288. }