MFC——LIstCtrl中嵌入Edit和Combobox控件
在MFC中经常会使用到ListCtrl控件，并且在控件中可以对单元格进行Edit的编辑或者ComboBox的编辑。实现ListCtrl中用edit和combobox编辑并数据同步，下面就是我用到的这个功能的简单实例。
为了让ListCtrol能更好的为我们所用，我们创建一个CEditListCtrl类继承自CListCtrl：
EditListCtrl.h
- #pragma once
- #include "ListEdit.h"
- #include "ListComboBox.h"
- #include "_PersistAttriMapXML.h"
- #define IDC_CELL_EDIT 0xffe0
- #define IDC_CELL_COMBOBOX 0xffe1
- // CEditListCtrl
- class CEditListCtrl : public CListCtrl
- {
- DECLARE_DYNAMIC(CEditListCtrl)
- public:
- CEditListCtrl();
- virtual ~CEditListCtrl();
- protected:
- DECLARE_MESSAGE_MAP()
- private:
- CListEdit m_edit;
- CListComboBox m_comboBox;
- int m_nRow; //行
- int m_nCol; //列
- public:
- // 当编辑完成后同步数据
- void DisposeEdit(void);
- //发送失效消息
- void SendInvalidateMsg();
- // 设置当前窗口的风格
- void SetStyle(void);
- afx_msg void OnLButtonDblClk(UINT nFlags, CPoint point);
- afx_msg void OnCbnSelchangeCbCellComboBox();
- afx_msg void OnHScroll(UINT nSBCode, UINT nPos, CScrollBar* pScrollBar);
- afx_msg void OnVScroll(UINT nSBCode, UINT nPos, CScrollBar* pScrollBar);
- };
#pragma once
#include "ListEdit.h"
#include "ListComboBox.h"
#include "_PersistAttriMapXML.h"
#define IDC_CELL_EDIT 0xffe0
#define IDC_CELL_COMBOBOX 0xffe1
// CEditListCtrl
class CEditListCtrl : public CListCtrl
{
DECLARE_DYNAMIC(CEditListCtrl)
public:
CEditListCtrl();
virtual ~CEditListCtrl();
protected:
DECLARE_MESSAGE_MAP()
private:
CListEdit m_edit;
CListComboBox m_comboBox;
int m_nRow; //行
int m_nCol; //列
public:
// 当编辑完成后同步数据
void DisposeEdit(void);
//发送失效消息
void SendInvalidateMsg();
// 设置当前窗口的风格
void SetStyle(void);
afx_msg void OnLButtonDblClk(UINT nFlags, CPoint point);
afx_msg void OnCbnSelchangeCbCellComboBox();
afx_msg void OnHScroll(UINT nSBCode, UINT nPos, CScrollBar* pScrollBar);
afx_msg void OnVScroll(UINT nSBCode, UINT nPos, CScrollBar* pScrollBar);
};
- // EditListCtrl.cpp : implementation file
- //
- #include "stdafx.h"
- #include "CADIPlatform.h"
- #include "EditListCtrl.h"
- #include "CodeDBHelper.h"
- #include "PersistXmlParser.h"
- // CEditListCtrl
- IMPLEMENT_DYNAMIC(CEditListCtrl, CListCtrl)
- CEditListCtrl::CEditListCtrl()
- {
- }
- CEditListCtrl::~CEditListCtrl()
- {
- }
- BEGIN_MESSAGE_MAP(CEditListCtrl, CListCtrl)
- ON_WM_LBUTTONDBLCLK()
- ON_CBN_SELCHANGE(IDC_CELL_COMBOBOX, &CEditListCtrl::OnCbnSelchangeCbCellComboBox)
- ON_WM_HSCROLL()
- ON_WM_VSCROLL()
- END_MESSAGE_MAP()
- // CEditListCtrl message handlers
- // 当编辑完成后同步数据
- void CEditListCtrl::DisposeEdit(void)
- {
- int nIndex = GetSelectionMark();
- //同步更新处理数据
- CString sLable;
- _PersistItem* pPersistItem = (_PersistItem*)GetItemData(m_nRow);
- if(NULL == pPersistItem) return ;
- if(0 == m_nCol) //edit控件
- {
- CString szLable;
- m_edit.GetWindowText(szLable);
- SetItemText(m_nRow,m_nCol,szLable);
- pPersistItem->szPersistence = szLable;
- m_edit.ShowWindow(SW_HIDE);
- }
- else if((1 == m_nCol) || (2 == m_nCol))
- {
- m_comboBox.ShowWindow(SW_HIDE);
- }
- }
- // 设置当前窗口的风格
- void CEditListCtrl::SetStyle(void)
- {
- LONG lStyle;
- lStyle = GetWindowLong(m_hWnd,GWL_STYLE);
- lStyle &= ~LVS_TYPEMASK; //清除显示方式
- lStyle |= LVS_REPORT; //list模式
- lStyle |= LVS_SINGLESEL; //单选
- SetWindowLong(m_hWnd,GWL_STYLE,lStyle);
- //扩展模式
- DWORD dwStyle = GetExtendedStyle();
- dwStyle |= LVS_EX_FULLROWSELECT; //选中某行使其整行高亮
- dwStyle |= LVS_EX_GRIDLINES; //网格线
- SetExtendedStyle(dwStyle); //设置扩展风格
- }
- void CEditListCtrl::OnLButtonDblClk(UINT nFlags, CPoint point)
- {
- // TODO: Add your message handler code here and/or call default
- CListCtrl::OnLButtonDblClk(nFlags, point);
- LVHITTESTINFO info;
- info.pt = point;
- info.flags = LVHT_ONITEMLABEL;
- if(SubItemHitTest(&info) >= 0)
- {
- m_nRow = info.iItem;
- m_nCol = info.iSubItem;
- CRect rect;
- GetSubItemRect(m_nRow,m_nCol,LVIR_LABEL,rect);
- CString strValue;
- strValue = GetItemText(m_nRow,m_nCol);
- _PersistItem* pPersistItem = (_PersistItem*)GetItemData(m_nRow);
- if(NULL == pPersistItem) return ;
- //Edit单元格
- if((0 == m_nCol))
- {
- if(pPersistItem->nFlag & 0x01)
- {
- MB_PROMPT(RES_LOAD_STRING(IDS_ST_MODIFIYPKATTRI_20170502_01));
- return ;
- }
- if(NULL == m_edit)
- {
- //创建Edit控件
- // ES_WANTRETURN 使多行编辑器接收回车键输入并换行。如果不指定该风格,按回车键会选择缺省的命令按钮,这往往会导致对话框的关闭。
- m_edit.Create(WS_CHILD|WS_BORDER|ES_AUTOHSCROLL|ES_WANTRETURN|ES_LEFT,
- CRect(0,0,0,0),this,IDC_CELL_EDIT);
- }
- m_edit.MoveWindow(rect);
- m_edit.SetWindowText(strValue);
- m_edit.ShowWindow(SW_SHOW);
- m_edit.SetSel(0,-1);
- m_edit.SetFocus();
- UpdateWindow();
- }
- //ComboBox单元格
- if((1 == m_nCol))
- {
- if(NULL == m_comboBox)
- {
- //创建Combobox控件
- //CBS_DROPDOWNLIST : 下拉式组合框，但是输入框内不能进行输入
- //WS_CLIPCHILDREN : 其含义就是，父窗口不对子窗口区域进行绘制。默认情况下父窗口会对子窗口背景是进行绘制的，但是如果父窗口设置了WS_CLIPCHILDREN属性，父亲窗口不在对子窗口背景绘制.
- m_comboBox.Create(WS_CHILD|WS_VISIBLE|CBS_SORT|WS_BORDER|CBS_DROPDOWNLIST|WS_VSCROLL|WS_TABSTOP|CBS_AUTOHSCROLL,
- CRect(0,0,0,0),this,IDC_CELL_COMBOBOX);
- }
- m_comboBox.MoveWindow(rect);
- m_comboBox.ShowWindow(SW_SHOW);
- //TODO comboBox 初始化
- LoadPlmAttri();
- //当前cell的值
- CString strCellValue = GetItemText(m_nRow,m_nCol);
- int nIndex = m_comboBox.FindStringExact(0,strCellValue);
- if(CB_ERR == nIndex)
- m_comboBox.SetCurSel(0); //TODO 设置为当前值的Item
- else
- m_comboBox.SetCurSel(nIndex);
- m_comboBox.SetFocus();
- UpdateWindow();
- }
- }
- }
- void CEditListCtrl::OnCbnSelchangeCbCellComboBox()
- {
- //同步更新处理数据
- _PersistItem* pPersistItem = (_PersistItem*)GetItemData(m_nRow);
- if(NULL == pPersistItem) return ;
- if(1 == m_nCol) //combobox控件
- {
- CString szLable;
- int nindex = m_comboBox.GetCurSel();
- m_comboBox.GetLBText(nindex,szLable);
- ATTRIFIELD* pAttriField = (ATTRIFIELD*)m_comboBox.GetItemData(nindex);
- if(NULL == pAttriField)
- return ;
- //持久化的处理
- if(0 == pAttriField->szComment.CompareNoCase(ATTRIBUTE_PERSISTENCE))
- {
- pPersistItem->szPersistence=pAttriField->mapPersistenceValue[ATTRIBUTE_VALUE];
- SetItemText(m_nRow,m_nCol-1,pPersistItem->szPersistence);
- }
- pPersistItem->szUcProperty = pAttriField->szPLMToXML;
- pPersistItem->szXmlOption = pAttriField->szXMLOpention;
- SetItemText(m_nRow,m_nCol,pAttriField->szDetail);
- m_comboBox.ShowWindow(SW_HIDE);
- }
- }
- //发送失效消息
- void CEditListCtrl::SendInvalidateMsg()
- {
- //Edit单元格
- if((0 == m_nCol))
- {
- if(NULL == m_edit.m_hWnd) return ;
- BOOL bShow = m_edit.IsWindowVisible();
- if(bShow)
- ::SendMessage(m_edit.m_hWnd,WM_KILLFOCUS,(WPARAM)0,(LPARAM)0);
- }
- else if((1 == m_nCol)) //combobox
- {
- if(NULL == m_comboBox.m_hWnd) return ;
- BOOL bShow = m_comboBox.IsWindowVisible();
- if(bShow)
- ::SendMessage(m_comboBox.m_hWnd,WM_KILLFOCUS,(WPARAM)0,(LPARAM)0);
- }
- }
- void CEditListCtrl::OnHScroll(UINT nSBCode, UINT nPos, CScrollBar* pScrollBar)
- {
- SendInvalidateMsg();
- CListCtrl::OnHScroll(nSBCode, nPos, pScrollBar);
- }
- void CEditListCtrl::OnVScroll(UINT nSBCode, UINT nPos, CScrollBar* pScrollBar)
- {
- SendInvalidateMsg();
- CListCtrl::OnVScroll(nSBCode, nPos, pScrollBar);
- }
// EditListCtrl.cpp : implementation file
//
#include "stdafx.h"
#include "CADIPlatform.h"
#include "EditListCtrl.h"
#include "CodeDBHelper.h"
#include "PersistXmlParser.h"
// CEditListCtrl
IMPLEMENT_DYNAMIC(CEditListCtrl, CListCtrl)
CEditListCtrl::CEditListCtrl()
{
}
CEditListCtrl::~CEditListCtrl()
{
}
BEGIN_MESSAGE_MAP(CEditListCtrl, CListCtrl)
ON_WM_LBUTTONDBLCLK()
ON_CBN_SELCHANGE(IDC_CELL_COMBOBOX, &CEditListCtrl::OnCbnSelchangeCbCellComboBox)
ON_WM_HSCROLL()
ON_WM_VSCROLL()
END_MESSAGE_MAP()
// CEditListCtrl message handlers
// 当编辑完成后同步数据
void CEditListCtrl::DisposeEdit(void)
{
int nIndex = GetSelectionMark();
//同步更新处理数据
CString sLable;
_PersistItem* pPersistItem = (_PersistItem*)GetItemData(m_nRow);
if(NULL == pPersistItem) return ;
if(0 == m_nCol) //edit控件
{
CString szLable;
m_edit.GetWindowText(szLable);
SetItemText(m_nRow,m_nCol,szLable);
pPersistItem->szPersistence = szLable;
m_edit.ShowWindow(SW_HIDE);
}
else if((1 == m_nCol) || (2 == m_nCol))
{
m_comboBox.ShowWindow(SW_HIDE);
}
}
// 设置当前窗口的风格
void CEditListCtrl::SetStyle(void)
{
LONG lStyle;
lStyle = GetWindowLong(m_hWnd,GWL_STYLE);
lStyle &= ~LVS_TYPEMASK; //清除显示方式
lStyle |= LVS_REPORT; //list模式
lStyle |= LVS_SINGLESEL; //单选
SetWindowLong(m_hWnd,GWL_STYLE,lStyle);
//扩展模式
DWORD dwStyle = GetExtendedStyle();
dwStyle |= LVS_EX_FULLROWSELECT; //选中某行使其整行高亮
dwStyle |= LVS_EX_GRIDLINES; //网格线
SetExtendedStyle(dwStyle); //设置扩展风格
}
void CEditListCtrl::OnLButtonDblClk(UINT nFlags, CPoint point)
{
// TODO: Add your message handler code here and/or call default
CListCtrl::OnLButtonDblClk(nFlags, point);
LVHITTESTINFO info;
info.pt = point;
info.flags = LVHT_ONITEMLABEL;
if(SubItemHitTest(&info) >= 0)
{
m_nRow = info.iItem;
m_nCol = info.iSubItem;
CRect rect;
GetSubItemRect(m_nRow,m_nCol,LVIR_LABEL,rect);
CString strValue;
strValue = GetItemText(m_nRow,m_nCol);
_PersistItem* pPersistItem = (_PersistItem*)GetItemData(m_nRow);
if(NULL == pPersistItem) return ;
//Edit单元格
if((0 == m_nCol))
{
if(pPersistItem->nFlag & 0x01)
{
MB_PROMPT(RES_LOAD_STRING(IDS_ST_MODIFIYPKATTRI_20170502_01));
return ;
}
if(NULL == m_edit)
{
//创建Edit控件
// ES_WANTRETURN 使多行编辑器接收回车键输入并换行。如果不指定该风格,按回车键会选择缺省的命令按钮,这往往会导致对话框的关闭。
m_edit.Create(WS_CHILD|WS_BORDER|ES_AUTOHSCROLL|ES_WANTRETURN|ES_LEFT,
CRect(0,0,0,0),this,IDC_CELL_EDIT);
}
m_edit.MoveWindow(rect);
m_edit.SetWindowText(strValue);
m_edit.ShowWindow(SW_SHOW);
m_edit.SetSel(0,-1);
m_edit.SetFocus();
UpdateWindow();
}
//ComboBox单元格
if((1 == m_nCol))
{
if(NULL == m_comboBox)
{
//创建Combobox控件
//CBS_DROPDOWNLIST : 下拉式组合框，但是输入框内不能进行输入
//WS_CLIPCHILDREN : 其含义就是，父窗口不对子窗口区域进行绘制。默认情况下父窗口会对子窗口背景是进行绘制的，但是如果父窗口设置了WS_CLIPCHILDREN属性，父亲窗口不在对子窗口背景绘制.
m_comboBox.Create(WS_CHILD|WS_VISIBLE|CBS_SORT|WS_BORDER|CBS_DROPDOWNLIST|WS_VSCROLL|WS_TABSTOP|CBS_AUTOHSCROLL,
CRect(0,0,0,0),this,IDC_CELL_COMBOBOX);
}
m_comboBox.MoveWindow(rect);
m_comboBox.ShowWindow(SW_SHOW);
//TODO comboBox 初始化
LoadPlmAttri();
//当前cell的值
CString strCellValue = GetItemText(m_nRow,m_nCol);
int nIndex = m_comboBox.FindStringExact(0,strCellValue);
if(CB_ERR == nIndex)
m_comboBox.SetCurSel(0); //TODO 设置为当前值的Item
else
m_comboBox.SetCurSel(nIndex);
m_comboBox.SetFocus();
UpdateWindow();
}
}
}
void CEditListCtrl::OnCbnSelchangeCbCellComboBox()
{
//同步更新处理数据
_PersistItem* pPersistItem = (_PersistItem*)GetItemData(m_nRow);
if(NULL == pPersistItem) return ;
if(1 == m_nCol) //combobox控件
{
CString szLable;
int nindex = m_comboBox.GetCurSel();
m_comboBox.GetLBText(nindex,szLable);
ATTRIFIELD* pAttriField = (ATTRIFIELD*)m_comboBox.GetItemData(nindex);
if(NULL == pAttriField)
return ;
//持久化的处理
if(0 == pAttriField->szComment.CompareNoCase(ATTRIBUTE_PERSISTENCE))
{
pPersistItem->szPersistence=pAttriField->mapPersistenceValue[ATTRIBUTE_VALUE];
SetItemText(m_nRow,m_nCol-1,pPersistItem->szPersistence);
}
pPersistItem->szUcProperty = pAttriField->szPLMToXML;
pPersistItem->szXmlOption = pAttriField->szXMLOpention;
SetItemText(m_nRow,m_nCol,pAttriField->szDetail);
m_comboBox.ShowWindow(SW_HIDE);
}
}
//发送失效消息
void CEditListCtrl::SendInvalidateMsg()
{
//Edit单元格
if((0 == m_nCol))
{
if(NULL == m_edit.m_hWnd) return ;
BOOL bShow = m_edit.IsWindowVisible();
if(bShow)
::SendMessage(m_edit.m_hWnd,WM_KILLFOCUS,(WPARAM)0,(LPARAM)0);
}
else if((1 == m_nCol)) //combobox
{
if(NULL == m_comboBox.m_hWnd) return ;
BOOL bShow = m_comboBox.IsWindowVisible();
if(bShow)
::SendMessage(m_comboBox.m_hWnd,WM_KILLFOCUS,(WPARAM)0,(LPARAM)0);
}
}
void CEditListCtrl::OnHScroll(UINT nSBCode, UINT nPos, CScrollBar* pScrollBar)
{
SendInvalidateMsg();
CListCtrl::OnHScroll(nSBCode, nPos, pScrollBar);
}
void CEditListCtrl::OnVScroll(UINT nSBCode, UINT nPos, CScrollBar* pScrollBar)
{
SendInvalidateMsg();
CListCtrl::OnVScroll(nSBCode, nPos, pScrollBar);
}
CEditListCtrl 类是一个控件类在一个dialog容器中动态创建：
- RECT listRect;
- GetDlgItem(IDC_ST_LISTGROUP)->GetWindowRect(&listRect); //获取List控件所在位位置，用Group占位
- ScreenToClient(&listRect);
- m_list.Create(WS_CHILD|WS_BORDER|LVS_SINGLESEL|LVS_REPORT,listRect,this,IDC_EDIT_LIST);
- m_list.SetExtendedStyle(LVS_EX_FULLROWSELECT|LVS_EX_GRIDLINES|LVS_EX_UNDERLINEHOT);
- m_list.ShowWindow(SW_SHOW);
RECT listRect;
GetDlgItem(IDC_ST_LISTGROUP)->GetWindowRect(&listRect); //获取List控件所在位位置，用Group占位
ScreenToClient(&listRect);
m_list.Create(WS_CHILD|WS_BORDER|LVS_SINGLESEL|LVS_REPORT,listRect,this,IDC_EDIT_LIST);
m_list.SetExtendedStyle(LVS_EX_FULLROWSELECT|LVS_EX_GRIDLINES|LVS_EX_UNDERLINEHOT);
m_list.ShowWindow(SW_SHOW); RECT rect;
m_list.GetClientRect(&rect);
m_list.InsertColumn(0,FirstColName,LVCFMT_LEFT,rect.right/2);
m_list.InsertColumn(1,SecondColName,LVCFMT_LEFT,rect.right/2); 这样就动态的创建了一个listctrl
接下来 我们继续完善 ListCtrl中的Edit 和Combobox的创建
在上面CEditListCtrl 中有两个成员变量 分别是 m_edit 和m_comboBox。 这两个成员变量是我们自顶一个 Edit 和ComboBox
ListEdit.h
#pragma once// CListEditclass CListEdit : public CEdit{DECLARE_DYNAMIC(CListEdit)public:CListEdit();virtual ~CListEdit();protected:DECLARE_MESSAGE_MAP()public:afx_msg void OnKillFocus(CWnd* pNewWnd);protected:virtual void PreSubclassWindow();};
ListEdit.cpp
- // ListEdit.cpp : implementation file
- //
- #include "stdafx.h"
- #include "CADIPlatform.h"
- #include "ListEdit.h"
- #include "EditListCtrl.h"
- // CListEdit
- IMPLEMENT_DYNAMIC(CListEdit, CEdit)
- CListEdit::CListEdit()
- {
- }
- CListEdit::~CListEdit()
- {
- }
- BEGIN_MESSAGE_MAP(CListEdit, CEdit)
- ON_WM_KILLFOCUS()
- END_MESSAGE_MAP()
- // CListEdit message handlers
- void CListEdit::OnKillFocus(CWnd* pNewWnd)
- {
- CEdit::OnKillFocus(pNewWnd);
- //ShowWindow(SW_HIDE);
- CEditListCtrl* temp = (CEditListCtrl*)GetParent();
- temp->DisposeEdit();
- }
- void CListEdit::PreSubclassWindow()
- {
- // TODO: Add your specialized code here and/or call the base class
- CEdit::PreSubclassWindow();
- }
// ListEdit.cpp : implementation file
//
#include "stdafx.h"
#include "CADIPlatform.h"
#include "ListEdit.h"
#include "EditListCtrl.h"
// CListEdit
IMPLEMENT_DYNAMIC(CListEdit, CEdit)
CListEdit::CListEdit()
{
}
CListEdit::~CListEdit()
{
}
BEGIN_MESSAGE_MAP(CListEdit, CEdit)
ON_WM_KILLFOCUS()
END_MESSAGE_MAP()
// CListEdit message handlers
void CListEdit::OnKillFocus(CWnd* pNewWnd)
{
CEdit::OnKillFocus(pNewWnd);
//ShowWindow(SW_HIDE);
CEditListCtrl* temp = (CEditListCtrl*)GetParent();
temp->DisposeEdit();
}
void CListEdit::PreSubclassWindow()
{
// TODO: Add your specialized code here and/or call the base class
CEdit::PreSubclassWindow();
}
ListComboBox.h
- #pragma once
- // CListComboBox
- class CListComboBox : public CComboBox
- {
- DECLARE_DYNAMIC(CListComboBox)
- public:
- CListComboBox();
- virtual ~CListComboBox();
- protected:
- DECLARE_MESSAGE_MAP()
- public:
- afx_msg void OnKillFocus(CWnd* pNewWnd);
- afx_msg void OnCbnDropdown();
- };
#pragma once
// CListComboBox
class CListComboBox : public CComboBox
{
DECLARE_DYNAMIC(CListComboBox)
public:
CListComboBox();
virtual ~CListComboBox();
protected:
DECLARE_MESSAGE_MAP()
public:
afx_msg void OnKillFocus(CWnd* pNewWnd);
afx_msg void OnCbnDropdown();
};
ListComboBox.cpp
- // ListComboBox.cpp : implementation file
- //
- #include "stdafx.h"
- #include "CADIPlatform.h"
- #include "ListComboBox.h"
- #include "EditListCtrl.h"
- // CListComboBox
- IMPLEMENT_DYNAMIC(CListComboBox, CComboBox)
- CListComboBox::CListComboBox()
- {
- }
- CListComboBox::~CListComboBox()
- {
- }
- BEGIN_MESSAGE_MAP(CListComboBox, CComboBox)
- ON_WM_KILLFOCUS()
- ON_CONTROL_REFLECT(CBN_DROPDOWN, &CListComboBox::OnCbnDropdown)
- END_MESSAGE_MAP()
- // CListComboBox message handlers
- void CListComboBox::OnKillFocus(CWnd* pNewWnd)
- {
- CComboBox::OnKillFocus(pNewWnd);
- //ShowWindow(SW_HIDE);
- CEditListCtrl *temp = (CEditListCtrl*)GetParent();
- temp->DisposeEdit(); //调用父窗口的DisposeEdit()函数
- }
- void CListComboBox::OnCbnDropdown()
- {
- CClientDC dc(this);
- int nTotalHeight = 0;
- //获取字体信息
- dc.SelectObject(GetFont());
- //获取当前item的个数
- int nCount = GetCount();
- if(nCount <= 0) return ;
- //获取字体的高度
- CString strLable=_T("");
- GetLBText(GetCurSel(),strLable);
- int nHeight = dc.GetTextExtent(strLable).cy;
- //组合框高度
- CRect rect;
- GetWindowRect(rect);
- int height = rect.Height();
- if(nCount>30)
- nTotalHeight = 30*nHeight + height;
- else
- nTotalHeight = nCount*nHeight + height;
- //设置下拉的高度
- CRect rc;
- GetClientRect(&rc);
- SetWindowPos(NULL,0,0,rc.Width(),rc.Height()+nTotalHeight,SWP_NOZORDER|SWP_NOMOVE|SWP_SHOWWINDOW);
- }
// ListComboBox.cpp : implementation file
//
#include "stdafx.h"
#include "CADIPlatform.h"
#include "ListComboBox.h"
#include "EditListCtrl.h"
// CListComboBox
IMPLEMENT_DYNAMIC(CListComboBox, CComboBox)
CListComboBox::CListComboBox()
{
}
CListComboBox::~CListComboBox()
{
}
BEGIN_MESSAGE_MAP(CListComboBox, CComboBox)
ON_WM_KILLFOCUS()
ON_CONTROL_REFLECT(CBN_DROPDOWN, &CListComboBox::OnCbnDropdown)
END_MESSAGE_MAP()
// CListComboBox message handlers
void CListComboBox::OnKillFocus(CWnd* pNewWnd)
{
CComboBox::OnKillFocus(pNewWnd);
//ShowWindow(SW_HIDE);
CEditListCtrl *temp = (CEditListCtrl*)GetParent();
temp->DisposeEdit(); //调用父窗口的DisposeEdit()函数
}
void CListComboBox::OnCbnDropdown()
{
CClientDC dc(this);
int nTotalHeight = 0;
//获取字体信息
dc.SelectObject(GetFont());
//获取当前item的个数
int nCount = GetCount();
if(nCount <= 0) return ;
//获取字体的高度
CString strLable=_T("");
GetLBText(GetCurSel(),strLable);
int nHeight = dc.GetTextExtent(strLable).cy;
//组合框高度
CRect rect;
GetWindowRect(rect);
int height = rect.Height();
if(nCount>30)
nTotalHeight = 30*nHeight + height;
else
nTotalHeight = nCount*nHeight + height;
//设置下拉的高度
CRect rc;
GetClientRect(&rc);
SetWindowPos(NULL,0,0,rc.Width(),rc.Height()+nTotalHeight,SWP_NOZORDER|SWP_NOMOVE|SWP_SHOWWINDOW);
}
在这两个控件中 OnKillFocus 用来让控件失去焦点后的数据同步。
combobox中 CBN_DROPDOWN 消息用来处理计算下拉框的的高度。
到这里简单实例已经完成。 谢谢！