分享
 
 
 

报表式CListCtrl的使用详解初稿

王朝vc·作者佚名  2006-01-08
窄屏简体版  字體: |||超大  

创建图形列表并和CListCtrl关联:

m_image_list.Create(IDB_CALLER2, 16, 10, RGB(192,192, 192));

m_image_list.SetBkColor( GetSysColor( COLOR_WINDOW ) );

m_caller_list.SetImageList( &m_image_list, LVSIL_SMALL);

为报表添加4列:

char *szColumn[]={"昵称","IP地址","登陆时间","状态"};

int widths[]={100,98,70,55};

LV_COLUMN lvc;

lvc.mask=LVCF_FMT|LVCF_WIDTH|LVCF_TEXT|LVCF_SUBITEM;

lvc.fmt=LVCFMT_LEFT;

for(int i=0;i<4;i++) {//插入各列

lvc.pszText=szColumn[i];

lvc.cx=widths[i];

lvc.iSubItem=i;

m_caller_list.InsertColumn(i,&lvc);

}

为报表添加两项,以附加方式添加:

char* data[4];

data[0]="所有人";

data[1]="0.0.0.0";

data[3]="在线";

data[2]=new char;

CTime now=CTime::GetCurrentTime();

CString temp = now.Format("%H:%M:%S");

data[2]=temp.GetBuffer(1);

LV_ITEM lvi;

lvi.mask=LVIF_TEXT|LVIF_IMAGE|LVIF_PARAM;

lvi.iSubItem=0;

lvi.pszText=(char *)data[0];

lvi.iImage = 0;

lvi.iItem=0;

m_caller_list.InsertItem(&lvi);

for (int j=0;j<4;j++) m_caller_list.SetItemText(count,j,data[j]);

count++;

lvi.iImage = 1;

lvi.iItem=count;

m_caller_list.InsertItem(&lvi);

data[0]="cherami";

data[1]="127.0.0.1";

for (int n=0;n<4;n++) m_caller_list.SetItemText(count,n,data[n]);

count++;

设置报表的样式

选中一整行:

m_list_ctrl.SetExtendedStyle(m_list_ctrl.GetExtendedStyle()|LVS_EX_FULLROWSELECT);

绘制表格:

m_list_ctrl.SetExtendedStyle(m_list_ctrl.GetExtendedStyle()|LVS_EX_GRIDLINES);

带复选框:

m_list_ctrl.SetExtendedStyle(m_list_ctrl.GetExtendedStyle()|LVS_EX_CHECKBOXES);

自动切换:

m_list_ctrl.SetExtendedStyle(m_list_ctrl.GetExtendedStyle()|LVS_EX_TRACKSELECT);

选定一行:

设置CListCtrl的Show selection always选项

SetItemState (iIndex, LVIS_SELECTED|LVIS_FOCUSED, LVIS_SELECTED|LVIS_FOCUSED)

选中一个或多个项目时,会发送LVN_ITEMCHANGED消息,可以使用

GetSelectedCount()方法得到被选定的项的数目。

点击列头的消息响应:

ON_NOTIFY(HDN_ITEMCLICKW, 0, ResponseFunc)

消息,需要自己添加

或者:

ON_NOTIFY(LVN_COLUMNCLICK, ID_yourCtrl, ResponseFunc)//向导添加

前者后响应,后者先响应

响应函数:

ResponseFunc(NMHDR *pNMHDR, LRESULT *pResult)

双击CListCtrl中的ITEM的消息是及消息函数:

ON_NOTIFY(NM_DBLCLK, ID_yourCtrl, ResponseFunc)

单击ITEM的消息响应:

ON_NOTIFY(NM_CLICK, ID_yourCtrl, ResponseFunc)

ResponseFunc(NMHDR *pNMHDR, LRESULT *pResult)

HDN_ITEMCLICK 就是Header control Notify message for mouse left click on the Header control!

而HDN_ITEMCLICK是当List View中存在一个Header Contrl时,Header Ctrl通知父窗口List View的!

CListCtrl中的Item被选中触发LBN_SELCHANGE(通过WM_COMMAND)消息!

删除CListCtrl中选定的项:

POSITION pos;

int nIndex;

for(; pos= GetFirstSelectedItemPosition();)

{

nIndex = GetNextSelectedItem(pos);

DeleteItem(nIndex);

}

在ListCtrl中进行排序

列表控件(CListCtrl)的顶部有一排按钮,用户可以通过选择不同的列来对记录进行排序。但是 CListCtrl并没有自动排序的功能,我们需要自己添加一个用于排序的回调函数来比较两个数据的大小,此外还需要响应排序按钮被点击的消息。下面讲述一下具体的做法。

CListCtrl提供了用于排序的函数,函数原型为:BOOL CListCtrl::SortItems( PFNLVCOMPARE pfnCompare, DWORD dwData )。其中第一个参数为全局排序函数的地址,第二个参数为用户数据,你可以根据你的需要传递一个数据或是指针。该函数返回-1代表第一项排应在第二项前面,返回1代表第一项排应在第二项后面,返回0代表两项相等。

用于排序的函数原形为:int CALLBACK ListCompare(LPARAM lParam1, LPARAM lParam2, LPARAM lParamSort),其中第三个参数为调用者传递的数据(即调用SortItems时的第二个参数dwData)。第一和第二个参数为用于比较的两项的ItemData,你可以通过DWORD CListCtrl::GetItemData( int nItem )/BOOL CListCtrl::SetItemData( int nItem, DWORD dwData )来对每一项的ItemData进行存取。在添加项时选用特定的CListCtrl::InsertItem也可以设置该值。由于你在排序时只能通过该值来确定项的位置所以你应该比较明确的确定该值的含义。

最后一点,我们需要知道什么时候需要排序,实现这点可以在父窗口中对LVN_COLUMNCLICK消息进行处理来实现。

下面我们看一个例子,这个例子是一个派生类,并支持顺序/倒序两种方式排序。为了简单我对全局数据进行排序,而在实际应用中会有多组需要排序的数据,所以需要通过传递参数的方式来告诉派序函数需要对什么数据进行排序。

//全局数据

struct DEMO_DATA

{

char szName[20];

int iAge;

}strAllData[5]={{"王某",30},{"张某",40},{"武某",32},{"陈某",20},{"李某",36}};

//CListCtrl派生类定义

class CSortList : public CListCtrl

{

// Construction

public:

CSortList();

BOOL m_fAsc;//是否顺序排序

int m_nSortedCol;//当前排序的列

protected:

//{{AFX_MSG(CSortList)

//}}AFX_MSG

...

};

//父窗口中包含该CListCtrl派生类对象

class CSort_in_list_ctrlDlg : public CDialog

{

// Construction

public:

CSort_in_list_ctrlDlg(CWnd* pParent = NULL); // standard constructor

// Dialog Data

//{{AFX_DATA(CSort_in_list_ctrlDlg)

enum { IDD = IDD_SORT_IN_LIST_CTRL_DIALOG };

CSortList m_listTest;

//}}AFX_DATA

}

//在父窗口中定义LVN_COLUMNCLICK消息映射

BEGIN_MESSAGE_MAP(CSort_in_list_ctrlDlg, CDialog)

//{{AFX_MSG_MAP(CSort_in_list_ctrlDlg)

ON_NOTIFY(LVN_COLUMNCLICK, IDC_LIST1, OnColumnclickList1)

//}}AFX_MSG_MAP

END_MESSAGE_MAP()

//初始化数据

BOOL CSort_in_list_ctrlDlg::OnInitDialog()

{

CDialog::OnInitDialog();

//初始化ListCtrl中数据列表

m_listTest.InsertColumn(0,"姓名");

m_listTest.InsertColumn(1,"年龄");

m_listTest.SetColumnWidth(0,80);

m_listTest.SetColumnWidth(1,80);

for(int i=0;i<5;i++)

{

m_listTest.InsertItem(i,strAllData[i].szName);

char szAge[10];

sprintf(szAge,"%d",strAllData[i].iAge);

m_listTest.SetItemText(i,1,szAge);

//设置每项的ItemData为数组中数据的索引

//在排序函数中通过该ItemData来确定数据

m_listTest.SetItemData(i,i);

}

return TRUE; // return TRUE unless you set the focus to a control

}

//处理消息

void CSort_in_list_ctrlDlg::OnColumnclickList1(NMHDR* pNMHDR, LRESULT* pResult)

{

NM_LISTVIEW* pNMListView = (NM_LISTVIEW*)pNMHDR;

//设置排序方式

if( pNMListView->iSubItem == m_listTest.m_nSortedCol )

m_listTest.m_fAsc = !m_listTest.m_fAsc;

else

{

m_listTest.m_fAsc = TRUE;

m_listTest.m_nSortedCol = pNMListView->iSubItem;

}

//调用排序函数

m_listTest.SortItems( ListCompare, (DWORD)&m_listTest );

*pResult = 0;

}

//排序函数实现

int CALLBACK ListCompare(LPARAM lParam1, LPARAM lParam2, LPARAM lParamSort)

{

//通过传递的参数来得到CSortList对象指针,从而得到排序方式

CSortList* pV=(CSortList*)lParamSort;

//通过ItemData来确定数据

DEMO_DATA* pInfo1=strAllData+lParam1;

DEMO_DATA* pInfo2=strAllData+lParam2;

CString szComp1,szComp2;

int iCompRes;

switch(pV->m_nSortedCol)

{

case(0):

//以第一列为根据排序

szComp1=pInfo1->szName;

szComp2=pInfo2->szName;

iCompRes=szComp1.Compare(szComp2);

break;

case(1):

//以第二列为根据排序

if(pInfo1->iAge == pInfo2->iAge)

iCompRes = 0;

else

iCompRes=(pInfo1->iAge < pInfo2->iAge)?-1:1;

break;

default:

ASSERT(0);

break;

}

//根据当前的排序方式进行调整

if(pV->m_fAsc)

return iCompRes;

else

return iCompRes*-1;

}

排序最快:

CListCtrl::SortItems

Example

// Sort the item in reverse alphabetical order.

static int CALLBACK

MyCompareProc(LPARAM lParam1, LPARAM lParam2, LPARAM lParamSort)

{

// lParamSort contains a pointer to the list view control.

// The lParam of an item is just its index.

CListCtrl* pListCtrl = (CListCtrl*) lParamSort;

CString strItem1 = pListCtrl->GetItemText(lParam1, 0);

CString strItem2 = pListCtrl->GetItemText(lParam2, 0);

return strcmp(strItem2, strItem1);

}

void snip_CListCtrl_SortItems()

{

// The pointer to my list view control.

extern CListCtrl* pmyListCtrl;

// Sort the list view items using my callback procedure.

pmyListCtrl->SortItems(MyCompareProc, (LPARAM) pmyListCtrl);

}

If you don’t want to allow the users to sort the list by clicking on the header, you can use the style LVS_NOSORTHEADER. However, if you do want to allow sorting, you do not specify the LVS_NOSORTHEADER. The control, though, does not sort the items. You have to handle the HDN_ITEMCLICK notification from the header control and process it appropriately. In the code below, we have used the sorting function SortTextItems() developed in a previous section. You may choose to sort the items in a different manner.

Step 1: Add two member variables

Add two member variables to the CListCtrl. The first variable to track which column has been sorted on, if any. The second variable to track if the sort is ascending or descending.

int nSortedCol;

BOOL bSortAscending;

Step 2: Initialize them in the constructor.

Initialize nSortedCol to -1 to indicate that no column has been sorted on. If the list is initially sorted, then this variable should reflect that.

nSortedCol = -1;

bSortAscending = TRUE;

Step 3: Add entry in message map to handle HDN_ITEMCLICK

Actually you need to add two entries. For HDN_ITEMCLICKA and HDN_ITEMCLICKW. Do not use the class wizard to add the entry. For one, you need to add two entries whereas the class wizard will allow you only one. Secondly, the class wizard uses the wrong macro in the entry. It uses ON_NOTIFY_REFLECT() instead of ON_NOTIFY(). Since the HDN_ITEMCLICK is a notification from the header control to the list view control, it is a direct notification and not a reflected one.

ON_NOTIFY(HDN_ITEMCLICKA, 0, OnHeaderClicked)

ON_NOTIFY(HDN_ITEMCLICKW, 0, OnHeaderClicked)

Note that we specify the same function for both the notification. Actually the program will receive one or the other and not both. What notification it receives will depend on the OS. The list view control on Windows 95 will send the ANSI version and the control on NT will send the UNICODE version.

Also, note that the second argument is zero. This value filters for the id of the control and we know that header control id is zero.

Step 4: Write the OnHeaderClicked() function

Here’s where you decide what to do when the user clicks on a column header. The expected behaviour is to sort the list based on the values of the items in that column. In this function we have used the SortTextItems() function developed in a previous section. If any of the columns displays numeric or date values, then you would have to provide custom sorting for them.

void CMyListCtrl::OnHeaderClicked(NMHDR* pNMHDR, LRESULT* pResult)

{

HD_NOTIFY *phdn = (HD_NOTIFY *) pNMHDR;

if( phdn->iButton == 0 )

{

// User clicked on header using left mouse button

if( phdn->iItem == nSortedCol )

bSortAscending = !bSortAscending;

else

bSortAscending = TRUE;

nSortedCol = phdn->iItem;

SortTextItems( nSortedCol, bSortAscending );

}

*pResult = 0;

}

让CListCtrl的SubItem也具有编辑功能:

要重载一个文本框,然后在LVN_BEGINLABELEDIT时改变文本框位置。

CInEdit m_InEdit;

if( ( GetStyle() & LVS_TYPEMASK ) == LVS_REPORT && ( m_nEditSubItem != 0 ) )

{

HWND hwndEdit;

CRect rtBound;

CString strText;

hwndEdit = (HWND)SendMessage( LVM_GETEDITCONTROL );

GetSubItemRect( pDispInfo->item.iItem, m_nEditSubItem, LVIR_LABEL, rtBound );

m_InEdit.SubclassWindow( hwndEdit );

m_InEdit.m_left = rtBound.left;

strText = GetItemText( pDispInfo->item.iItem, m_nEditSubItem );

m_InEdit.SetWindowText( strText );

}

void CInEdit::OnWindowPosChanging(WINDOWPOS FAR* lpwndpos)

{

CRect rtClient;

lpwndpos->x = m_left; // m_left在LVN_BEGINLABELEDIT中设置

CEdit::OnWindowPosChanging(lpwndpos);

// TODO: Add your message handler code here

}

 
 
 
免责声明:本文为网络用户发布,其观点仅代表作者个人观点,与本站无关,本站仅提供信息存储服务。文中陈述内容未经本站证实,其真实性、完整性、及时性本站不作任何保证或承诺,请读者仅作参考,并请自行核实相关内容。
2023年上半年GDP全球前十五强
 百态   2023-10-24
美众议院议长启动对拜登的弹劾调查
 百态   2023-09-13
上海、济南、武汉等多地出现不明坠落物
 探索   2023-09-06
印度或要将国名改为“巴拉特”
 百态   2023-09-06
男子为女友送行,买票不登机被捕
 百态   2023-08-20
手机地震预警功能怎么开?
 干货   2023-08-06
女子4年卖2套房花700多万做美容:不但没变美脸,面部还出现变形
 百态   2023-08-04
住户一楼被水淹 还冲来8头猪
 百态   2023-07-31
女子体内爬出大量瓜子状活虫
 百态   2023-07-25
地球连续35年收到神秘规律性信号,网友:不要回答!
 探索   2023-07-21
全球镓价格本周大涨27%
 探索   2023-07-09
钱都流向了那些不缺钱的人,苦都留给了能吃苦的人
 探索   2023-07-02
倩女手游刀客魅者强控制(强混乱强眩晕强睡眠)和对应控制抗性的关系
 百态   2020-08-20
美国5月9日最新疫情:美国确诊人数突破131万
 百态   2020-05-09
荷兰政府宣布将集体辞职
 干货   2020-04-30
倩女幽魂手游师徒任务情义春秋猜成语答案逍遥观:鹏程万里
 干货   2019-11-12
倩女幽魂手游师徒任务情义春秋猜成语答案神机营:射石饮羽
 干货   2019-11-12
倩女幽魂手游师徒任务情义春秋猜成语答案昆仑山:拔刀相助
 干货   2019-11-12
倩女幽魂手游师徒任务情义春秋猜成语答案天工阁:鬼斧神工
 干货   2019-11-12
倩女幽魂手游师徒任务情义春秋猜成语答案丝路古道:单枪匹马
 干货   2019-11-12
倩女幽魂手游师徒任务情义春秋猜成语答案镇郊荒野:与虎谋皮
 干货   2019-11-12
倩女幽魂手游师徒任务情义春秋猜成语答案镇郊荒野:李代桃僵
 干货   2019-11-12
倩女幽魂手游师徒任务情义春秋猜成语答案镇郊荒野:指鹿为马
 干货   2019-11-12
倩女幽魂手游师徒任务情义春秋猜成语答案金陵:小鸟依人
 干货   2019-11-12
倩女幽魂手游师徒任务情义春秋猜成语答案金陵:千金买邻
 干货   2019-11-12
 
推荐阅读
 
 
 
>>返回首頁<<
 
靜靜地坐在廢墟上,四周的荒凉一望無際,忽然覺得,淒涼也很美
© 2005- 王朝網路 版權所有