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Size Grip Control

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29 Aug 2006CPOL2 min read 35.2K   261   9  
A very easy way of resizing CWnd based objects.
// TestSizeGripDlg.cpp : implementation file
//

#include "stdafx.h"
#include "TestSizeGrip.h"
#include "TestSizeGripDlg.h"

#ifdef _DEBUG
#define new DEBUG_NEW
#endif


// CAboutDlg dialog used for App About

class CAboutDlg : public CDialog
{
public:
	CAboutDlg();

// Dialog Data
	enum { IDD = IDD_ABOUTBOX };

	protected:
	virtual void DoDataExchange(CDataExchange* pDX);    // DDX/DDV support

// Implementation
protected:
	DECLARE_MESSAGE_MAP()
};

CAboutDlg::CAboutDlg() : CDialog(CAboutDlg::IDD)
{
}

void CAboutDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
}

BEGIN_MESSAGE_MAP(CAboutDlg, CDialog)
END_MESSAGE_MAP()


// CTestSizeGripDlg dialog



CTestSizeGripDlg::CTestSizeGripDlg(CWnd* pParent /*=NULL*/)
	: CDialog(CTestSizeGripDlg::IDD, pParent)
{
	m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);
}

void CTestSizeGripDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
}

BEGIN_MESSAGE_MAP(CTestSizeGripDlg, CDialog)
	ON_WM_SYSCOMMAND()
	ON_WM_PAINT()
	ON_WM_QUERYDRAGICON()
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()


// CTestSizeGripDlg message handlers

BOOL CTestSizeGripDlg::OnInitDialog()
{
	CDialog::OnInitDialog();

	// Add "About..." menu item to system menu.

	// IDM_ABOUTBOX must be in the system command range.
	ASSERT((IDM_ABOUTBOX & 0xFFF0) == IDM_ABOUTBOX);
	ASSERT(IDM_ABOUTBOX < 0xF000);

	CMenu* pSysMenu = GetSystemMenu(FALSE);
	if (pSysMenu != NULL)
	{
		CString strAboutMenu;
		strAboutMenu.LoadString(IDS_ABOUTBOX);
		if (!strAboutMenu.IsEmpty())
		{
			pSysMenu->AppendMenu(MF_SEPARATOR);
			pSysMenu->AppendMenu(MF_STRING, IDM_ABOUTBOX, strAboutMenu);
		}
	}

	// Set the icon for this dialog.  The framework does this automatically
	//  when the application's main window is not a dialog
	SetIcon(m_hIcon, TRUE);			// Set big icon
	SetIcon(m_hIcon, FALSE);		// Set small icon

	// TODO: Add extra initialization here
	CRect rect;
	GetClientRect(&rect);
	rect.left = rect.right-12;
	m_rightGrip.Create(NULL, _T(""), WS_CHILD|WS_VISIBLE, rect, this, 12);
	
	GetClientRect(&rect);
	rect.top = 100;
	rect.bottom = 300;
	rect.left = 100;
	rect.right = 300;
	m_tc.Create(NULL, _T(""), WS_CHILD|WS_VISIBLE, rect, this, 13);
	
	return TRUE;  // return TRUE  unless you set the focus to a control
}

void CTestSizeGripDlg::OnSysCommand(UINT nID, LPARAM lParam)
{
	if ((nID & 0xFFF0) == IDM_ABOUTBOX)
	{
		CAboutDlg dlgAbout;
		dlgAbout.DoModal();
	}
	else
	{
		CDialog::OnSysCommand(nID, lParam);
	}
}

// If you add a minimize button to your dialog, you will need the code below
//  to draw the icon.  For MFC applications using the document/view model,
//  this is automatically done for you by the framework.

void CTestSizeGripDlg::OnPaint() 
{
	if (IsIconic())
	{
		CPaintDC dc(this); // device context for painting

		SendMessage(WM_ICONERASEBKGND, reinterpret_cast<WPARAM>(dc.GetSafeHdc()), 0);

		// Center icon in client rectangle
		int cxIcon = GetSystemMetrics(SM_CXICON);
		int cyIcon = GetSystemMetrics(SM_CYICON);
		CRect rect;
		GetClientRect(&rect);
		int x = (rect.Width() - cxIcon + 1) / 2;
		int y = (rect.Height() - cyIcon + 1) / 2;

		// Draw the icon
		dc.DrawIcon(x, y, m_hIcon);
	}
	else
	{
		CDialog::OnPaint();
	}
}

// The system calls this function to obtain the cursor to display while the user drags
//  the minimized window.
HCURSOR CTestSizeGripDlg::OnQueryDragIcon()
{
	return static_cast<HCURSOR>(m_hIcon);
}

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This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)


Written By
Web Developer
Greece Greece
My name is George Drivas.
The programming was for me the main job. Now I am coding mostly for fun. My main language is C\C++ and I am using the most common developments tools. I am interesting mostly for the MFC development. This site is (in my opinion) the best for MFC development. I hope that I will be able to contribute in this community.

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