How to make a Dialog resizable

[THEARTOFWEB]

Hi,

I am dealing with dialog window created usign ResEdit as a resource editor. Now, I'd need to make a window resizable and to have all the child controls in it resize themselves according to the dialog size. Can iy actually be done?


This is the code for the dialog:

//
// Dialog resources
//

IDD_POPUP DIALOG 25, 25, 485, 254
STYLE DS_SETFONT | DS_MODALFRAME | DS_FIXEDSYS | WS_POPUP | WS_CAPTION | WS_SYSMENU
CAPTION "List View Window"
FONT 8, "MS Shell Dlg"
BEGIN
    CONTROL "", IDC_LIST1, WC_LISTVIEW, WS_TABSTOP | WS_BORDER | LVS_ALIGNLEFT | LVS_REPORT, 4294967294, 4294967295, 489, 230
END

thanks

[THEARTOFWEB]

I see lots of examples of how to do this out there but they are all for MFC
or other toolkits. I need to do this in a C++ app using normal win32 API
calls.

[hoxsiew]

There's nothing inherent to MFC that makes this any different. Basically you have to do it all yourself. Make the dialog resizable (resizing border: WS_SIZEBOX or WS_THICKFRAME), then handle the WM_SIZE message. In your handler, resize all you controls to fit the dialog the way you want by calling MoveWindow or SetWindoPos on them.

[THEARTOFWEB]

I noticed something strange with this code:

INT_PTR CALLBACK procPopup(HWND hDlg, UINT message, WPARAM wParam, LPARAM lParam)
{
	UNREFERENCED_PARAMETER(lParam);

	RECT rc;
	memset(&rc,0,sizeof(RECT));
	GetWindowRect(hDlg, &rc);
	
	TCHAR szBottom[5] = {0};
	_itot_s(rc.bottom,szBottom,5,10);

	TCHAR szRight[5] = {0};
	_itot_s(rc.right,szRight,5,10);

	TCHAR szTop[5] = {0};
	_itot_s(rc.top,szTop,5,10);

	TCHAR szLeft[5] = {0};
	_itot_s(rc.left,szLeft,5,10);

	TCHAR marameo[256] = {0};
	_tcsncat_s(marameo, _T("Bottom: "),10);
	_tcsncat_s(marameo, szBottom,5);
	_tcsncat_s(marameo, _T(" Width: "),10);
	_tcsncat_s(marameo, szRight,5);
	_tcsncat_s(marameo, _T(" Top: "),10);
	_tcsncat_s(marameo, szTop,5);
	_tcsncat_s(marameo, _T(" Left: "),10);
	_tcsncat_s(marameo, szLeft,5);


	switch (message)
	{
	case WM_SIZE:
		SetWindowText(hDlg, (LPTSTR)marameo);
		break;

	case WM_MOVE:
		//SetWindowText(hDlg, (LPTSTR)marameo);
		break;
	}

}

even if I just move the window that will affect "bottom" and "right" vars...so I think using the values from RECT might be wrong approach

[THEARTOFWEB]

I guess this is the right code to achieve the goal:

	int dlgw           = 0;
	int dlgh           = 0;
	TCHAR szWidth[5]   = {0};
	TCHAR szHeight[5]  = {0};
	TCHAR marameo[256] = {0};
	HWND hListView     = GetDlgItem(hDlg, IDC_LIST1);

	case WM_SIZE:
		//
		// WM_SIZE Notification
		// http://msdn.microsoft.com/en-us/library/ms632646%28VS.85%29.aspx
		//

		// Resize List view inside window
		//
		dlgw = (int)LOWORD(lParam);
		dlgh = (int)HIWORD(lParam);

		_itot_s(dlgw,szWidth,5,10);
		_itot_s(dlgh,szHeight,5,10);

		_tcsncat_s(marameo, _T("Width: "),10);
		_tcsncat_s(marameo, szWidth,5);
		_tcsncat_s(marameo, _T(" Height: "),10);
		_tcsncat_s(marameo, szHeight,5);
	
		SetWindowText(hDlg, (LPTSTR)marameo);

		MoveWindow(hListView, -1, -1, (dlgw + 2), (dlgh -25) , true);
		ShowWindow(hListView, SW_SHOW);
		/////////////////////////////////////////////////////////////////////
		break;

Now, I'd like to avoid the window from resizing less the x300, y250 like it has some min width and minheight values....do you think that is possible?

thanks

[VladimirF]

Now, I'd like to avoid the window from resizing less the x300, y250 like it has some min width and minheight values....do you think that is possible?

Sure - check out WM_GETMINMAXINFO message.

[THEARTOFWEB]

by the way, I have found the the status bar does not need any actual parameters to be redrawn! the following creates a status bar in the Dialog:

	// Create Status Bar
	//
	InitCommonControls();
	HWND hWndStatus = CreateWindowEx(0,STATUSCLASSNAME,NULL,WS_CHILD | WS_VISIBLE,0,0,10,10,hDlg,(HMENU)IDC_STATUSBAR,hInst,NULL);
	
	UINT indicators[] = {250,1100};                                         // Lunghezza celle status bar:
																			//da 0 a 250 e da 250 a 1100

	SendMessage( hWndStatus, SB_SETPARTS, 2, (LPARAM)(LPINT)indicators);    // setta la status bar in due celle con
																			// con le misure create prima (indicators)

	SendMessage( hWndStatus, SB_SETTEXT, 0, (LPARAM)TEXT("Hello World!") ); // Riempi prima cella
	SendMessage( hWndStatus, SB_SETTEXT, 1, (LPARAM)TEXT("Hello World!") ); // Riempi seconda cella

	if (hWndStatus == NULL)
	{
		MessageBox (NULL, TEXT("Status Bar not created!"), NULL, MB_OK );
	}

with this I handle the WM_SIZE inside the dlgProc:

MoveWindow(hStatusBar, 0, 0, 0 ,0 , true);
ShowWindow(hStatusBar, SW_SHOW);

it gets redrawn correctly!

[THEARTOFWEB]

Sure - check out WM_GETMINMAXINFO message.

uhm...I think I need some help with that

[THEARTOFWEB]

I tried adding this:

	case WM_GETMINMAXINFO:
		pMMI = (LPMINMAXINFO)lParam;
		pMMI->ptMaxTrackSize.x = 300;
		pMMI->ptMaxTrackSize.y = 300;
		break;

Yet, whenever I move or resize the Dialog window it resizes to those parameters and cannot be resized anymore :-(

EDIT: sorry that was a shame of me:

	case WM_GETMINMAXINFO:
		pMMI = (LPMINMAXINFO)lParam;
		pMMI->ptMinTrackSize.x = 300;
		pMMI->ptMinTrackSize.y = 300;
		break;

[Marc G]

If you want to move a lot of windows without too much flickering, you can use DeferWindowPos.

[happyuk]

http://andyuk2010.blogspot.com/2011/...-controls.html

0 down vote


The above blog posting has instructions on how to create a minimalist re-sizeable dialog in MFC.

It is basically an implementation of Paulo Messina's posting at CodeProject but with as much extraneous stuff removed as possible, just to help clarify how to do it better.

It is fairly straightforward to implement once you've had a bit of practice: the important bits are to:

i. ensure you have his CodeProject libraries etc pulled into your project and it all compiles correctly.

ii. do the extra initialization required inside the OnInitDialog method: make the gripper visible, set the maximum dilog size, add anchor points to the dialog control items that you wish to 'stretch' etc.

iii. Replace usage of CDialog with CResizableDialog at the appropriate points: in the dialog class definition, constructor, DoDataExchange, BEGIN_MESSAGE_MAP, OnInitDialog etc.