MFC common controls [turn]

• Reference video: https://www.bilibili.com/video/BV1JW41147NX?t=2&p=3

catalogue

MFC common controls [turn]

Static text box CStatic

Normal button CButton

Edit box CEdit

Combo box (drop-down box) CComboBox

List control CListCtrl

Tree control CTreeCtrl

Add Icon resource (icon)

Label control CTabCtrl

Static text box CStatic

• Static text box is the simplest control. It is mainly used to display text information. It cannot accept user input. Generally, it does not need to connect variables or process messages.  
• Important properties of static text boxes are:
  • ID: the default ID of all static text boxes is IDC_STATIC, static ID, not responding to any message (event)
  • Caption: modify the displayed content

Interface	function
CWnd::SetWindowText	Set control content
CWnd::GetWindowText	Get control content
CStatic::SetBitmap	Set bitmap (picture with suffix bmp)

Associated control variables:

• Due to XXX_STATIC static ID is a variable that cannot be associated, so you need to modify the ID before associating the variable:

• In the main dialog class OnInitDialog(), complete the corresponding interface test:

• Example 1: setting text

m_text.SetWindowTextW(TEXT("ha-ha"));

CString str;
m_text.GetWindowTextW(str);
MessageBox(str);

• Example 2: display picture:

//Set the static control window style to bitmap centered display
m_pic.ModifyStyle(0xf, SS_BITMAP | SS_CENTERIMAGE);

//Get bitmap handle through path
#define HBMP(filepath,width,height) (HBITMAP)LoadImage(AfxGetInstanceHandle(),filepath,IMAGE_BITMAP,width,height,LR_LOADFROMFILE|LR_CREATEDIBSECTION)

//The width and height settings should be set according to the size of the control
CRect rect;
m_pic.GetWindowRect(rect);

//Static control setting bitmap
m_pic.SetBitmap(HBMP(TEXT("./1.bmp"), rect.Width(), rect.Height()));

Normal button CButton

• The main attribute of the button is Caption, which sets the text displayed on the button.
• The most messages processed by the command button are: BN_CLICKED, double-click the button to jump to the processing function.
  • Alternatively, click button properties - > control event - > select the desired event and add the processing function:

Interface	function
CWnd::SetWindowText	Set control content
CWnd::GetWindowText	Get control content
CWnd::EnableWindow	Sets whether the control is grayed out

Associated control variables:

• In the main dialog class OnInitDialog(), complete the corresponding interface test

//Get the contents of the button
CString str;
m_button.GetWindowText(str);
MessageBox(str);

//Set button content
m_button.SetWindowText(TEXT("^_^"));

//Set button status to gray
m_button.EnableWindow(FALSE);
m_button.EnableWindow(TRUE);

Edit box CEdit

• Common attribute settings:

attribute	meaning
Number	True can only enter numbers
Password	True password mode
Want return	True receives the Enter key to wrap the line automatically. Line wrapping can only be performed in multiline mode
Multiline	True multiline mode
Auto VScroll	True: when there are too many characters in the vertical direction, the scroll bar will appear automatically, and the Vertical Scroll setting is valid
Vertical Scroll	True when there are too many characters in the vertical direction, the scroll bar will appear automatically. It is used with Auto VScroll
Horizontal Scroll	True when there are too many characters in the vertical direction, the scroll bar will appear automatically. It is used in combination with auto hscoll
Read Only	True read only

• Common interfaces:

Interface	function
CWnd::SetWindowText	Set control content
CWnd::GetWindowText	Get control content

Associate control variables

• In the main dialog class OnInitDialog(), complete the corresponding interface test:

/Set button content
m_edit.SetWindowText(TEXT("this is a test"));

//Get the contents of the button
CString str;
m_edit.GetWindowText(str);
MessageBox(str);

Associate basic type variables

• If an edit box is connected with a variable of Value category, the variable represents the edit box, and the content displayed in the edit box is the Value of the variable.
• However, changing the content of the edit box will not automatically update the value of the corresponding variable. Similarly, changing the value of the variable will not automatically refresh the content of the edit box. To maintain consistency, you need to use the UpdateData() function to update:
  • If the contents of the edit box are changed, the statement UpdateData(TRUE) should be used to obtain the dialog box data
  • If value of the variable changes, dialog box control should be initialized with the statement update data (false)

• In the main dialog class OnInitDialog(), complete the corresponding code test:

m_e1 = 10.11;

UpdateData(FALSE); //FALSE indicates that M_ The value of E1 is updated to the corresponding control

UpdateData(TRUE); //TRUE indicates that the value of the control is updated to m_e1 variable

Combo box (drop-down box) CComboBox

• Common attribute settings:

attribute	meaning
data	Set the content, and use the semicolon ";" in English between different contents separate
type	Display style
Sort	True auto sort content

• Common interfaces:

CComboBox::AddString	Add a string to the combo box
CComboBox::SetCurSel	Sets the current selection (which item is currently displayed), and the subscript starts from 0
CComboBox::GetCurSel	Gets the subscript of the currently selected item in the combo box
CComboBox::GetLBText	Gets the content of the specified location
CComboBox::DeleteString	Deletes the string at the specified location
CComboBox::InsertString	Inserts a string at the specified location

• After associating control variables, test the interface:

• Example:

m_cbx.AddString(TEXT("Tang Monk"));
m_cbx.AddString(TEXT("Sun WuKong"));
m_cbx.AddString(TEXT("Zhu Bajie"));
m_cbx.AddString(TEXT("Monk Sha"));

//Set default options
m_cbx.SetCurSel(0);

//insert
m_cbx.InsertString(4, TEXT("White dragon horse"));

//delete
m_cbx.DeleteString(3);

//Get the specific contents of the index of No. 1
CString str;
m_cbx.GetLBText(1, str);
MessageBox(str);

• Get the selected subscript and display the content:

//Get the index position
int index = m_cbx.GetCurSel();

CString str;
m_cbx.GetLBText(index, str);

MessageBox(str);

• Common events for combo boxes are: CBN_SELCHANGE: this event is automatically triggered when an item in the combo box is selected.

void CMFCApplication2Dlg::OnCbnSelchangeCombo1()
{
	// TODO: add control notification handler code here
}

List control CListCtrl

• Common attribute settings: View - > report (report method)

• Common interfaces:

Interface	function
CListCtrl::SetExtendedStyle	Set list style
CListCtrl::GetExtendedStyle	Get list style
CListCtrl::InsertColumn	Insert a column, mainly used to set the title
CListCtrl::InsertItem	Insert new item content on a line
CListCtrl::SetItemText	Set the sub item content of a row and a column
CListCtrl::GetItemText	Get the contents of a row or column

• After associating control variables, test the interface:

• Example:

//Set style
//LVS_EX_GRIDLINES grid
//LVS_EX_FULLROWSELECT selects the entire row
m_list.SetExtendedStyle(m_list.GetExtendedStyle()
	| LVS_EX_GRIDLINES | LVS_EX_FULLROWSELECT);

//Insert title
CString head[] = { TEXT("full name"), TEXT("Age"), TEXT("Gender") };

//Insert column
m_list.InsertColumn(0, head[0], LVCFMT_LEFT, 100);
m_list.InsertColumn(1, head[1], LVCFMT_LEFT, 100);
m_list.InsertColumn(2, head[2], LVCFMT_LEFT, 100);

//Insert the body content, first determine the row, and then determine the column
for (int i = 0; i < 10; i++)
{
	CString str;
	str.Format(TEXT("Zhang San_%d"), i );

	//OK line
	m_list.InsertItem(i, str);

	//Set column
	int j = 0;
	m_list.SetItemText(i, ++j, TEXT("male"));
	m_list.SetItemText(i, ++j, TEXT("23"));
}

• Program rendering:

Tree control CTreeCtrl

• Common attribute settings:

attribute	meaning
has buttons	True has an expand button
has lines	True has expansion lines
lines at root	True has a root node

• Common interfaces:

Interface	function
AfxGetApp()	Get application object pointer
CWinApp::LoadIcon	Load custom icon
CImageList::Create	Create image list
CImageList::Add	Image list append Icon
CTreeCtrl::SetImageList	Set drawing status list
CTreeCtrl::InsertItem	Insert node
CTreeCtrl::SelectItem	Set default selection
CTreeCtrl::GetSelectedItem	Get selected item
CTreeCtrl::GetItemText	Get something

• Associated control variables:

Add Icon resource (icon)

• Put the ico resource file in the project res folder

• Resource view - > icon - > Add Resource:

• Import ico file

• Load icon through code

//1. Settings Icon

//Prepare HICON Icon
HICON icons[4];
icons[0] = AfxGetApp()->LoadIconW(IDI_ICON1);
icons[1] = AfxGetApp()->LoadIconW(IDI_ICON2);
icons[2] = AfxGetApp()->LoadIconW(IDI_ICON3);
icons[3] = AfxGetApp()->LoadIconW(IDI_ICON4);

//CImageList list; // This collection must be saved h do member properties

//Create a picture collection
list.Create(30, 30, ILC_COLOR32, 4, 4);
//Add specific pictures
for (int i = 0; i < 4;i++)
{
	list.Add(icons[i]);
}
m_tree.SetImageList(&list, TVSIL_NORMAL);


//2. Set node
HTREEITEM root = m_tree.InsertItem(TEXT("Root node"), 0, 0, NULL);
HTREEITEM parent = m_tree.InsertItem(TEXT("Parent node"), 1, 1, root);
HTREEITEM sub1 = m_tree.InsertItem(TEXT("Child node 1"), 2, 2, parent);
HTREEITEM sub2 = m_tree.InsertItem(TEXT("Child node 2"), 3, 3, parent);

//Set default options
m_tree.SelectItem(sub1);

• Common events of tree control are: TVN_SELCHANGED: this event is automatically triggered when a node is selected.

void CMy06CTreeCtrlDlg::OnTvnSelchangedTree1(NMHDR *pNMHDR, LRESULT *pResult)
{
	LPNMTREEVIEW pNMTreeView = reinterpret_cast<LPNMTREEVIEW>(pNMHDR);
	// TODO: add control notification handler code here
	*pResult = 0;

	//Get current item
	HTREEITEM item = m_tree.GetSelectedItem();

	CString name = m_tree.GetItemText(item);

	MessageBox(name);
}

Label control CTabCtrl

• Drag and drop Tab Control in the ui toolbox

• Put tabsheet H and tabsheet CPP is placed in the project file sibling directory and added to the project directory

• Associate Tab Control on ui with Control type (CTabSheet)

• Add dialog box
  • a) Resource view - > Dialog - > right click - > insert Dialog
  • b) Set corresponding properties:
    • Style - > child (child window)
    • Border - > none
  • c) Custom class: click dialog box template - > right click - > Add Class (MyDlg1, MyDlg2)
  • d) In the main dialog box, you need corresponding header files to define custom class objects

• OnInitDialog() in the main dialog class does initialization

//Add Tab
m_tab.AddPage(TEXT("System settings"), &dlg1, IDD_DIALOG1);
m_tab.AddPage(TEXT("system management"), &dlg2, IDD_DIALOG2);
//display
m_tab.Show();

• Attached:
• TabSheet.h:

#if !defined(AFX_TABSHEET_H__42EE262D_D15F_46D5_8F26_28FD049E99F4__INCLUDED_)
#define AFX_TABSHEET_H__42EE262D_D15F_46D5_8F26_28FD049E99F4__INCLUDED_

#if _MSC_VER > 1000
#pragma once
#endif // _MSC_VER > 1000
// TabSheet.h : header file
//

/
// CTabSheet window
#define MAXPAGE 16

class CTabSheet : public CTabCtrl
{
	// Construction
public:
	CTabSheet();
	
	// Attributes
public:
	
	// Operations
public:
	
	// Overrides
	// ClassWizard generated virtual function overrides
	//{{AFX_VIRTUAL(CTabSheet)
	//}}AFX_VIRTUAL
	
	// Implementation
public:
	int GetCurSel();
	int SetCurSel(int nItem);
	void Show();
	void SetRect();
	BOOL AddPage(LPCTSTR title, CDialog *pDialog, UINT ID);
	virtual ~CTabSheet();
	
	// Generated message map functions
protected:
	LPCTSTR m_Title[MAXPAGE];
	UINT m_IDD[MAXPAGE];
	CDialog* m_pPages[MAXPAGE];
	int m_nNumOfPages;
	int m_nCurrentPage;
	//{{AFX_MSG(CTabSheet)
	afx_msg void OnLButtonDown(UINT nFlags, CPoint point);
	afx_msg void OnHScroll(UINT nSBCode, UINT nPos, CScrollBar* pScrollBar);
	//}}AFX_MSG
	
	DECLARE_MESSAGE_MAP()
};

/

//{{AFX_INSERT_LOCATION}}
// Microsoft Visual C++ will insert additional declarations immediately before the previous line.

#endif // !defined(AFX_TABSHEET_H__42EE262D_D15F_46D5_8F26_28FD049E99F4__INCLUDED_)

• TabSheet.cpp:

// TabSheet.cpp : implementation file
//

#include "stdafx.h"
//#include "Property5.h"
#include "TabSheet.h"

#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif

/
// CTabSheet

CTabSheet::CTabSheet()
{
	m_nNumOfPages = 0;
	m_nCurrentPage = 0;
}

CTabSheet::~CTabSheet()
{
}


BEGIN_MESSAGE_MAP(CTabSheet, CTabCtrl)
	//{{AFX_MSG_MAP(CTabSheet)
	ON_WM_LBUTTONDOWN()
	ON_WM_HSCROLL()
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/
// CTabSheet message handlers

BOOL CTabSheet::AddPage(LPCTSTR title, CDialog *pDialog,UINT ID)
{
	if( MAXPAGE == m_nNumOfPages )
		return FALSE;

	m_nNumOfPages++;

	m_pPages[m_nNumOfPages-1] = pDialog;
	m_IDD[m_nNumOfPages-1] = ID;
	m_Title[m_nNumOfPages-1] = title;

	return TRUE;
}

void CTabSheet::SetRect()
{
	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-2;
	nYc=tabRect.bottom-nY-2;

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

}

void CTabSheet::Show()
{
	int i = 0;
	for( i=0; i < m_nNumOfPages; i++ )
	{
		m_pPages[i]->Create( m_IDD[i], this );
		if (AfxGetMainWnd())
			InsertItem( i, m_Title[i] );
		else
			return;
	}

	m_pPages[0]->ShowWindow(SW_SHOW);
	for( i=1; i < m_nNumOfPages; i++)
		m_pPages[i]->ShowWindow(SW_HIDE);

	SetRect();

}

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

	if(m_nCurrentPage != GetCurFocus())
	{
		m_pPages[m_nCurrentPage]->ShowWindow(SW_HIDE);
		m_nCurrentPage=GetCurFocus();
		m_pPages[m_nCurrentPage]->ShowWindow(SW_SHOW);
//		m_pPages[m_nCurrentPage]->SetFocus();

		//AfxMessageBox("checked"); wbm test
	}
	
}

int CTabSheet::SetCurSel(int nItem)
{
	if( nItem < 0 || nItem >= m_nNumOfPages)
		return -1;

	int ret = m_nCurrentPage;

	if(m_nCurrentPage != nItem )
	{
		m_pPages[m_nCurrentPage]->ShowWindow(SW_HIDE);
		m_nCurrentPage = nItem;
		m_pPages[m_nCurrentPage]->ShowWindow(SW_SHOW);
//		m_pPages[m_nCurrentPage]->SetFocus();
		CTabCtrl::SetCurSel(nItem);
	}

	return ret;
}

int CTabSheet::GetCurSel()
{
	return CTabCtrl::GetCurSel();
}

void CTabSheet::OnHScroll(UINT nSBCode, UINT nPos, CScrollBar* pScrollBar) 
{
	// TODO: Add your message handler code here and/or call default
	
	CTabCtrl::OnHScroll(nSBCode, nPos, pScrollBar);
}