MFC用GDI+动感歌词的制作

源代码：http://download.csdn.net/detail/nuptboyzhb/4219669

源代码：

1.       插入一个对话框的资源，删除默认控件，并为对话框创建一个类，命名为ClyricDlg;

2.       在对话框的头文件中添加GDI+相关的头文件和动态库

#define UNICODE

#ifndef ULONG_PTR

#define ULONG_PTR unsigned long*

#endif

#include "GDIPlus\\Includes\\GdiPlus.h"   ////Modify your path

using namespace Gdiplus;

#pragma comment(lib, "GDIPlus\\Lib\\gdiplus.lib") //Modify your lib path

3.       新增公有成员变量：

int m_kind;

int cx;

BOOL UpdateDisplay(int Transparent=255);

HINSTANCE hFuncInst ;

typedef BOOL (WINAPI *MYFUNC)(HWND,HDC,

POINT*,SIZE*,HDC,POINT*,COLORREF,BLENDFUNCTION*,DWORD);

MYFUNC UpdateLayeredWindow;

BLENDFUNCTION m_Blend;

HDC m_hdcMemory;

4.       新增私有成员变量：

BOOL m_bBack;

GdiplusStartupInput gdiplusStartupInput;

ULONG_PTR           gdiplusToken;

5.       在构造函数中初始化如下成员变量：

m_bBack=false;

m_kind=cx=0;

GdiplusStartup(&gdiplusToken, &gdiplusStartupInput, NULL);

6.       为对话框添加OnCreate函数，并编辑代码如下：

hFuncInst = LoadLibrary("User32.DLL");

BOOL bRet=FALSE;

if(hFuncInst)

UpdateLayeredWindow=(MYFUNC)GetProcAddress(hFuncInst, "UpdateLayeredWindow");

else

{

AfxMessageBox("User32.dll ERROR!");

exit(0);

}

// Initialize GDI+.

m_Blend.BlendOp=0; //theonlyBlendOpdefinedinWindows2000

m_Blend.BlendFlags=0; //nothingelseisspecial...

m_Blend.AlphaFormat=1; //...

m_Blend.SourceConstantAlpha=255;//AC_SRC_ALPHA

7.       实现其成员函数UpdataDisplay

[cpp] view plaincopy

1. BOOL CLyricDlg::UpdateDisplay(int Transparent)
2. {
3. //获得DC，创建兼容DC
4. HDC hdcTemp=GetDC()->m_hDC;
5. m_hdcMemory=CreateCompatibleDC(hdcTemp);
6. HBITMAP hBitMap=CreateCompatibleBitmap(hdcTemp,755,350);
7. SelectObject(m_hdcMemory,hBitMap);
8. //设置透明度最大值为100
9. if(Transparent<0||Transparent>100)      Transparent=100;
10. //将透明度参数，传递给BLENDFUNCTION；
11. m_Blend.SourceConstantAlpha=int(Transparent*2.55);//1~255
12. RECT rct;
13. //获取窗口的屏幕位置
14. GetWindowRect(&rct);
15. //窗口左上角的坐标
16. POINT ptWinPos={rct.left,rct.top};
17. //创建2个兼容DC的画笔，Graphics类在GDI+中定义
18. Graphics graph(m_hdcMemory);
19. Graphics graphics(m_hdcMemory);
20. //设置平滑模式
21. graphics.SetSmoothingMode(SmoothingModeAntiAlias);
22. graphics.SetInterpolationMode(InterpolationModeHighQualityBicubic);
23. //设置字体，FontFamily也在GDI+中定义
24. FontFamily fontFamily(L"Arial Black");
25. StringFormat strformat;
26. //获取系统时间
27. CTime time=CTime::GetCurrentTime();
28. CString timestr=time.Format("%H-%M-%M");
29. wchar_t pszbuf[][80]={{L"http://blog.csdn.net/nuptboyzhb"},
30. {L"南京邮电大学郑海波"},
31. {L"I wish you will lead a  happy life!"},
32. {L"[email protected]"},
33. {L"NUPT"}
34. };
35. //创建一个画笔的路径
36. GraphicsPath path;
37. path.AddString(pszbuf[m_kind],wcslen(pszbuf[m_kind]),&fontFamily,
38. FontStyleRegular,38,Point(10,10),&strformat);
39. //创建一支画笔
40. Pen pen(Color(155,215,215,215),3);
41. //画笔画出已经创建的路径
42. graphics.DrawPath(&pen,&path);
43. /*画出字体的边缘部分*/
44. for(int i=1; i<9; i+=1)
45. {
46. Pen pen(Color(62, 0, 2, 2),(float)i);
47. pen.SetLineJoin(LineJoinRound);
48. graphics.DrawPath(&pen, &path);
49. }
50. SolidBrush brush(Color(25,228,228,228));
51. Pen pen1(Color(155,223,223,223));
52. Pen pen2(Color(55,223,223,223));
53. Image image(L"1.png");
54. if(m_bBack)//画背景和图片
55. {
56. graphics.FillRectangle(&brush,3,5,750,90);
57. graphics.DrawRectangle(&pen1,2,6,751,91);
58. graphics.DrawRectangle(&pen2,1,5,753,93);
59. graphics.DrawImage(&image,600,5);
60. }
61. //创建线性渐变画刷
62. LinearGradientBrush linGrBrush(
63. Point(0,0),Point(0,90),
64. Color(255,255,255,255),
65. Color(255,30,120,195));
66. LinearGradientBrush linGrBrushW(
67. Point(0,10),Point(0,60),
68. Color(255,255,255,255),
69. Color(15,1,1,1));
70. //用线性渐变画刷填充路径
71. graphics.FillPath(&linGrBrush,&path);
72. graphics.FillPath(&linGrBrushW,&path);
73. //设置窗口的风格
74. DWORD dwExStyle=GetWindowLong(m_hWnd,GWL_EXSTYLE);
75. if((dwExStyle&0x80000)!=0x80000)
76. SetWindowLong(m_hWnd,GWL_EXSTYLE,dwExStyle^0x80000);
77. //更新窗口层
78. SIZE sizeWindow={755,350};
79. POINT ptSrc={0,0};
80. BOOL bRet=FALSE;
81. HDC hdcScreen=::GetDC (m_hWnd);
82. //UpdateLayeredWindow功能是更新一个窗口的位置、大小、形状、内容和透明度
83. bRet= UpdateLayeredWindow( m_hWnd,hdcScreen,&ptWinPos,
84. &sizeWindow,m_hdcMemory,&ptSrc,0,&m_Blend,2);
85. graph.ReleaseHDC(m_hdcMemory);
86. ::ReleaseDC(m_hWnd,hdcScreen);
87. hdcScreen=NULL;
88. ::ReleaseDC(m_hWnd,hdcTemp);
89. hdcTemp=NULL;
90. DeleteObject(hBitMap);
91. DeleteDC(m_hdcMemory);
92. m_hdcMemory=NULL;
93. return bRet;
94. }

8.       添加OnTimer(UINT nIDEvent)消息响应函数，编辑代码如下：

cx+=1;

if(cx>20)

{

m_kind++;

m_bBack=false;

UpdateDisplay();

cx=0;

}

if(m_kind>3)

m_kind=0;

9.       编辑OnInitDialog()函数

// TODO: Add extra initialization here

UpdateDisplay();

SetTimer(1,50,NULL);