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6月19日

Creating a CTabCtrl Application


Rating:

Ben Hill (view profile)
April 3, 2000

Environment: VC6 SP3, NT4, Windows 2000 Pro, Windows 2000 Server

Firstly add the CMyTabCtrl.cpp and CMyTabCtrl.h to your project.

Using Visual Studio add a CTabCtrl control to your dialog. Add a member variable for this control as a CMyTabCtrl type not a simple CTabCtrl. CMyTabCtrl is derived from CTabCtrl.

You can simply add a CTabCtrl member variable and manually edit the file to become CMyTabCtrl

Now create dialogs for every page you require. These must be child dialogs with no border. Any controls here in these dialogs are handled by their own class.

Create a Class for each dialog. In the example these are CTabOne, CTabTwo and CTabThree.

In the CmyTabCtrl constructor you must add a new for each page. Also in the Init function you must specify all tab dialogs to hide all but one

In this example the OnLButtonDown message handler is used to show and hide the various dialogs. The page is managed with a variable m_tabCurrent which holds the value of selected pages.

In the main app dialogs OnInitDialog message handler add the tabs you require for your dialog. In this example these are Tab One, Tab Two and Tab Three.

Functionality for the left and right cursor keys to select the tabs can be added in the CMyTabCtrl class.

CMyTabCtrl::CMyTabCtrl()
{
m_tabPages[0]=new CTabOne;
m_tabPages[1]=new CTabTwo;
m_tabPages[2]=new CTabThree;

m_nNumberOfPages=3;
}

CMyTabCtrl::~CMyTabCtrl()
{
for(int nCount=0; nCount < m_nNumberOfPages; nCount++){
  delete m_tabPages[nCount];
}
}

void CMyTabCtrl::Init()
{
m_tabCurrent=0;

m_tabPages[0]->Create(IDD_TAB_ONE, this);
m_tabPages[1]->Create(IDD_TAB_TWO, this);
m_tabPages[2]->Create(IDD_TAB_THREE, this);

m_tabPages[0]->ShowWindow(SW_SHOW);
m_tabPages[1]->ShowWindow(SW_HIDE);
m_tabPages[2]->ShowWindow(SW_HIDE);

SetRectangle();
}

void CMyTabCtrl::SetRectangle()
{
CRect tabRect, itemRect;
int nX, nY, nXc, nYc;

GetClientRect(&tabRect);
GetItemRect(0, &itemRect);

nX=itemRect.left;
nY=itemRect.bottom+1;
nXc=tabRect.right-itemRect.left-1;
nYc=tabRect.bottom-nY-1;

m_tabPages[0]->SetWindowPos(&wndTop, nX, nY, nXc, nYc, SWP_SHOWWINDOW);
for(int nCount=1; nCount < m_nNumberOfPages; nCount++){
  m_tabPages[nCount]->SetWindowPos(&wndTop, nX, nY, nXc, nYc, SWP_HIDEWINDOW);
}
}

//////////////////////////////////////////////////////
// CMyTabCtrl message handlers

void CMyTabCtrl::OnLButtonDown(UINT nFlags, CPoint point)
{
CTabCtrl::OnLButtonDown(nFlags, point);

if(m_tabCurrent != GetCurFocus()){
  m_tabPages[m_tabCurrent]->ShowWindow(SW_HIDE);
  m_tabCurrent=GetCurFocus();
  m_tabPages[m_tabCurrent]->ShowWindow(SW_SHOW);
  m_tabPages[m_tabCurrent]->SetFocus();
}
}
The Dialog Showing, Hiding and Drawing code is from the C++ Forum On this site. It was posted by someone whom I don't have name for.

If it was you then please let me know and I will have your name added

I hope this code is of some use. It has helped me to develop much more complex dialogs.

Downloads
Download demo project - 18 Kb
Download source - 2 Kb

原帖地址:http://www.codeguru.com/Cpp/controls/controls/tabcontrols/article.php/c5239

6月18日

VC中读写ini文件

我们写的程序当中,总有一些配置信息需要保存下来,以便完成程序的功能,最简单的办法就是将这些信息写入INI文件中,程序初始化时再读入.具体应用如下:
  一.将信息写入.INI文件中.
  1.所用的WINAPI函数原型为:
BOOL WritePrivateProfileString(
LPCTSTR lpAppName,
LPCTSTR lpKeyName,
LPCTSTR lpString,
LPCTSTR lpFileName
);
  其中各参数的意义:
   LPCTSTR lpAppName 是INI文件中的一个字段名.
   LPCTSTR lpKeyName 是lpAppName下的一个键名,通俗讲就是变量名.
   LPCTSTR lpString 是键值,也就是变量的值,不过必须为LPCTSTR型或CString型的.
LPCTSTR lpFileName 是完整的INI文件名.
2.具体使用方法:设现有一名学生,需把他的姓名和年龄写入 c:\stud\student.ini 文件中.
CString strName,strTemp;
int nAge;
strName="张三";
nAge=12;
::WritePrivateProfileString("StudentInfo","Name",strName,"c:\\stud\\student.ini");
此时c:\stud\student.ini文件中的内容如下:
[StudentInfo]
   Name=张三
  3.要将学生的年龄保存下来,只需将整型的值变为字符型即可:
strTemp.Format("%d",nAge);
::WritePrivateProfileString("StudentInfo","Age",strTemp,"c:\\stud\\student.ini");
  二.将信息从INI文件中读入程序中的变量.
  1.所用的WINAPI函数原型为:
DWORD GetPrivateProfileString(
LPCTSTR lpAppName,
LPCTSTR lpKeyName,
LPCTSTR lpDefault,
LPTSTR lpReturnedString,
DWORD nSize,
LPCTSTR lpFileName
);
  其中各参数的意义:
   前二个参数与 WritePrivateProfileString中的意义一样.
   lpDefault : 如果INI文件中没有前两个参数指定的字段名或键名,则将此值赋给变量.
   lpReturnedString : 接收INI文件中的值的CString对象,即目的缓存器.
   nSize : 目的缓存器的大小.
   lpFileName : 是完整的INI文件名.
  2.具体使用方法:现要将上一步中写入的学生的信息读入程序中.
CString strStudName;
int nStudAge;
GetPrivateProfileString("StudentInfo","Name","默认姓名",strStudName.GetBuffer(MAX_PATH),MAX_PATH,"c:\\stud\\student.ini");
  执行后 strStudName 的值为:"张三",若前两个参数有误,其值为:"默认姓名".
  3.读入整型值要用另一个WINAPI函数:
UINT GetPrivateProfileInt(
LPCTSTR lpAppName,
LPCTSTR lpKeyName,
INT nDefault,
LPCTSTR lpFileName
);
  这里的参数意义与上相同.使用方法如下:
nStudAge=GetPrivateProfileInt("StudentInfo","Age",10,"c:\\stud\\student.ini");
  三.循环写入多个值,设现有一程序,要将最近使用的几个文件名保存下来,具体程序如下:
  1.写入:
CString strTemp,strTempA;
int i;
int nCount=6;
file://共有6个文件名需要保存
for(i=0;i {strTemp.Format("%d",i);
strTempA=文件名;
file://文件名可以从数组,列表框等处取得.
::WritePrivateProfileString("UseFileName","FileName"+strTemp,strTempA,"c:\\usefile\\usefile.ini");
}
strTemp.Format("%d",nCount);
::WritePrivateProfileString("FileCount","Count",strTemp,"c:\\usefile\\usefile.ini");
file://将文件总数写入,以便读出.
  2.读出:
nCount=::GetPrivateProfileInt("FileCount","Count",0,"c:\\usefile\\usefile.ini");
for(i=0;i {strTemp.Format("%d",i);
strTemp="FileName"+strTemp;
::GetPrivateProfileString("CurrentIni",strTemp,"default.fil", strTempA.GetBuffer(MAX_PATH),MAX_PATH,"c:\\usefile\\usefile.ini");
file://使用strTempA中的内容.
}
  补充四点:
   1.INI文件的路径必须完整,文件名前面的各级目录必须存在,否则写入不成功,该函数返回 FALSE 值.
   2.文件名的路径中必须为 \\ ,因为在VC++中, \\ 才表示一个 \ .
   3.也可将INI文件放在程序所在目录,此时 lpFileName 参数为: ".\\student.ini".
   4.从网页中粘贴源代码时,最好先粘贴至记事本中,再往VC中粘贴,否则易造成编译错误,开始时我也十分不解,好好的代码怎么就不对呢?后来才找到这个方法.还有一些代码中使用了全角字符如:<,\等,也会造成编译错误.

原帖地址:http://www.caisong.com/read.php/368.htm