Click here to Skip to main content
12,248,978 members (36,586 online)
Click here to Skip to main content

Stats

1.2M views
27.3K downloads
258 bookmarked
Posted

ResizableLib

, 15 Jun 2004 CPOL
A set of classes to ease the development of resizable windows with MFC
ResizableDialog
Demo.dsp
Demo.dsw
Release_Static
Demo.exe
Demo.exe.manifest
res
bitmap1.bmp
Demo.ico
toolbar1.bmp
ResizableFormViewMDI
Demo.dsp
Demo.dsw
Release_Static
Demo.exe
Demo.exe.manifest
res
Demo.ico
DemoDoc.ico
DemoDoc0.ico
DemoDoc1.ico
DemoDoc2.ico
ResizableFormViewSDI
Demo.dsp
Demo.dsw
Release_Static
Demo.exe
Demo.exe.manifest
res
Demo.ico
DemoDoc.ico
Toolbar.bmp
ResizableLib
.cvsignore
Docs
CVS
Entries
Repository
Root
Release_Static
ResizableLib.lib
ResizableLib.dsp
ResizableLib.dsw
.cvsignore
ResizableLib.dsp
ResizableLib.dsw
ChangeLog
ResizableLib.dsp
ResizableLib.dsw
ResizableMsgSupport.inl
Doxyfile-include
Doxyfile
ResizableLib.dsp
ResizableLib.dsw
ResizableLib.dsp
ResizableLib.dsw
.cvsignore
ResizableProperties
Demo.dsp
Demo.dsw
Release_Static
Demo.exe
Demo.exe.manifest
res
Demo.ico
ResizableWizard97
Release_Static
Wizard97.exe
Wizard97.exe.manifest
res
Baner16.bmp
Baner256.bmp
Water16.bmp
Water256.bmp
Wizard97.ico
Wizard97.dsp
Wizard97.dsw
// ResizableLayout.cpp: implementation of the CResizableLayout class.
//
/////////////////////////////////////////////////////////////////////////////
//
// Copyright (C) 2000-2001 by Paolo Messina
// (http://www.geocities.com/ppescher - ppescher@yahoo.com)
//
// The contents of this file are subject to the Artistic License (the "License").
// You may not use this file except in compliance with the License. 
// You may obtain a copy of the License at:
// http://www.opensource.org/licenses/artistic-license.html
//
// If you find this code useful, credits would be nice!
//
/////////////////////////////////////////////////////////////////////////////

#include "stdafx.h"
#include "ResizableLayout.h"

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

//////////////////////////////////////////////////////////////////////
// Construction/Destruction
//////////////////////////////////////////////////////////////////////

#define BS_TYPEMASK SS_TYPEMASK

void CResizableLayout::AddAnchor(HWND hWnd, CSize sizeTypeTL, CSize sizeTypeBR)
{
	CWnd* pParent = GetResizableWnd();

	// child window must be valid
	ASSERT(::IsWindow(hWnd));
	// must be child of parent window
	ASSERT(::IsChild(pParent->GetSafeHwnd(), hWnd));
	// top-left anchor must be valid
	ASSERT(sizeTypeTL != NOANCHOR);

	// get control's window class
	CString st;
	GetClassName(hWnd, st.GetBufferSetLength(MAX_PATH), MAX_PATH);
	st.ReleaseBuffer();

	// add the style 'clipsiblings' to a GroupBox
	// to avoid unnecessary repainting of controls inside
	if (st == "Button")
	{
		DWORD style = GetWindowLong(hWnd, GWL_STYLE);
		if ((style & BS_TYPEMASK) == BS_GROUPBOX)
			SetWindowLong(hWnd, GWL_STYLE, style | WS_CLIPSIBLINGS);
	}

	// window classes that don't redraw client area correctly
	// when the hor scroll pos changes due to a resizing
	BOOL bHScroll = FALSE;
	if (st == "ListBox")
		bHScroll = TRUE;

	// window classes that need refresh when resized
	BOOL bRefresh = NeedsRefresh(hWnd);

	// get parent window's rect
	CRect rectParent;
	GetTotalClientRect(&rectParent);
	// and child control's rect
	CRect rectChild;
	::GetWindowRect(hWnd, &rectChild);
	pParent->ScreenToClient(&rectChild);

	// go calculate margins
	CSize sizeMarginTL, sizeMarginBR;

	if (sizeTypeBR == NOANCHOR)
		sizeTypeBR = sizeTypeTL;
	
	// calculate margin for the top-left corner

	sizeMarginTL.cx = rectChild.left - rectParent.Width() * sizeTypeTL.cx / 100;
	sizeMarginTL.cy = rectChild.top - rectParent.Height() * sizeTypeTL.cy / 100;
	
	// calculate margin for the bottom-right corner

	sizeMarginBR.cx = rectChild.right - rectParent.Width() * sizeTypeBR.cx / 100;
	sizeMarginBR.cy = rectChild.bottom - rectParent.Height() * sizeTypeBR.cy / 100;

	// add to the list
	LayoutInfo layout(hWnd, sizeTypeTL, sizeMarginTL,
		sizeTypeBR, sizeMarginBR, bHScroll, bRefresh);
	// always add before callbacks
	m_arrLayout.InsertAt(m_iFirstCallback++, layout);
}

// one callback control cannot rely upon another callback control's
// size and/or position (they're updated all together at the end)
void CResizableLayout::AddAnchorCallback(UINT nCallbackID)
{
	// add to the list
	LayoutInfo layout;
	layout.nCallbackID = nCallbackID;
	// callbacks added to tail (for efficiency)
	m_arrLayout.Add(layout);
}

BOOL CResizableLayout::ArrangeLayoutCallback(LayoutInfo& /*layout*/)
{
	ASSERT(FALSE);
	// must be overridden, if callback is used
	
	return FALSE;	// no output data
}

void CResizableLayout::ArrangeLayout()
{
	CWnd* pParent = GetResizableWnd();

	// get parent window's rect
	CRect rectParent;
	GetTotalClientRect(&rectParent);

	// init some vars
	int i, count = m_arrLayout.GetSize();
	HDWP hdwp = BeginDeferWindowPos(count);

	for (i=0; i<count; ++i)
	{
		LayoutInfo layout = m_arrLayout[i];
		
		if (layout.hWnd == NULL)	// callback
		{
			if (i == m_iFirstCallback)	// first time only
			{
				// update previous controls
				EndDeferWindowPos(hdwp);
				// start again for callback controls
				hdwp = BeginDeferWindowPos(count-i);
			}
			// callbacks are added at the end, so that
			// you don't have multiple screen updates

			if (!ArrangeLayoutCallback(layout))	// request data
				continue;
		}

		CRect rectChild, newrc;
		CWnd* pWnd = CWnd::FromHandle(layout.hWnd); // temporary solution

		pWnd->GetWindowRect(&rectChild);
		pParent->ScreenToClient(&rectChild);
		
		// calculate new top-left corner

		newrc.left = layout.sizeMarginTL.cx + rectParent.Width() * layout.sizeTypeTL.cx / 100;
		newrc.top = layout.sizeMarginTL.cy + rectParent.Height() * layout.sizeTypeTL.cy / 100;
		
		// calculate new bottom-right corner

		newrc.right = layout.sizeMarginBR.cx + rectParent.Width() * layout.sizeTypeBR.cx / 100;
		newrc.bottom = layout.sizeMarginBR.cy + rectParent.Height() * layout.sizeTypeBR.cy / 100;

		if (!newrc.EqualRect(&rectChild))
		{
			if (layout.bAdjHScroll)
			{
				// needs repainting, due to horiz scrolling
				int diff = newrc.Width() - rectChild.Width();
				int max = pWnd->GetScrollLimit(SB_HORZ);
			
				layout.bNeedRefresh = FALSE;
				if (max > 0 && pWnd->GetScrollPos(SB_HORZ) > max - diff)
				{
					layout.bNeedRefresh = TRUE;
				}
			}

			// set flags 
			DWORD flags = SWP_NOZORDER | SWP_NOACTIVATE | SWP_NOREPOSITION;
			if (layout.bNeedRefresh)
				flags |= SWP_NOCOPYBITS;
			if (newrc.TopLeft() == rectChild.TopLeft())
				flags |= SWP_NOMOVE;
			if (newrc.Size() == rectChild.Size())
				flags |= SWP_NOSIZE;
			
			hdwp = DeferWindowPos(hdwp, layout.hWnd, NULL, newrc.left, newrc.top,
				newrc.Width(), newrc.Height(), flags);
		}
	}
	// go re-arrange child windows
	EndDeferWindowPos(hdwp);
}

void CResizableLayout::EnumAndClipChildWindow(HWND hWnd, CDC* pDC)
{
	// obtain window position
	CRect rect;
	::GetWindowRect(hWnd, &rect);
	GetResizableWnd()->ScreenToClient(&rect);
	pDC->DPtoLP(&rect);

	// use window region if any
	CRgn rgn;
	rgn.CreateRectRgn(0,0,0,0);
	if (COMPLEXREGION == ::GetWindowRgn(hWnd, rgn))
	{
		rgn.OffsetRgn(rect.TopLeft());
	}
	else
	{
		rgn.SetRectRgn(&rect);
	}

	// go clipping?
	if (LikesClipping(hWnd))
		pDC->SelectClipRgn(&rgn, RGN_DIFF);
	else
		pDC->SelectClipRgn(&rgn, RGN_OR);
}

void CResizableLayout::ClipChildren(CDC *pDC)
{
	// only clips anchored controls
	for (int i=0; i<m_arrLayout.GetSize(); ++i)
	{
		HWND hWnd = m_arrLayout[i].hWnd;
		if (hWnd != NULL && ::IsWindowVisible(hWnd))
			EnumAndClipChildWindow(m_arrLayout[i].hWnd, pDC);
	}
}

void CResizableLayout::GetTotalClientRect(LPRECT lpRect)
{
	GetResizableWnd()->GetClientRect(lpRect);
}

BOOL CResizableLayout::NeedsRefresh(HWND hWnd)
{
	// get window class
	CString st;
	GetClassName(hWnd, st.GetBufferSetLength(MAX_PATH), MAX_PATH);
	st.ReleaseBuffer();

	// optimistic, no need to refresh
	BOOL bRefresh = FALSE;

	// window classes that need refresh when resized
	if (st == "Static")
	{
		DWORD style = GetWindowLong(hWnd, GWL_STYLE);

		switch (style & SS_TYPEMASK)
		{
		case SS_LEFT:
		case SS_CENTER:
		case SS_RIGHT:
		case SS_ENHMETAFILE:
		case SS_BITMAP:
			// word-wrapped text needs bRefresh
			bRefresh = TRUE;
			break;

		case SS_ICON:
		case SS_SIMPLE:
		case SS_ETCHEDHORZ:
		case SS_ETCHEDVERT:
			break;

		default:
			// centered images or text need bRefresh
			if (style & SS_CENTERIMAGE)
				bRefresh = TRUE;
		}
	}

	return bRefresh;
}

BOOL CResizableLayout::LikesClipping(HWND hWnd)
{
	// check child type
	CString st;
	GetClassName(hWnd, st.GetBufferSetLength(MAX_PATH), MAX_PATH);
	st.ReleaseBuffer();

	DWORD style = GetWindowLong(hWnd, GWL_STYLE);

	// skip windows that wants background repainted
	if (st == TOOLBARCLASSNAME && (style & TBSTYLE_TRANSPARENT))
		return FALSE;
	if (st == "Button" && (style & BS_TYPEMASK) == BS_GROUPBOX)
		return FALSE;
	if (st == "Static")
	{
		switch (style & SS_TYPEMASK)
		{
		case SS_BLACKRECT:
		case SS_GRAYRECT:
		case SS_WHITERECT:
		case SS_ETCHEDHORZ:
		case SS_ETCHEDVERT:
		case SS_BITMAP:
			break;
		case SS_ICON:
		case SS_ENHMETAFILE:
			if (style & SS_CENTERIMAGE)
				return FALSE;
			break;
		default:
			return FALSE;
		}
	}

	// assume the others like clipping
	return TRUE;
}

By viewing downloads associated with this article you agree to the Terms of Service and the article's licence.

If a file you wish to view isn't highlighted, and is a text file (not binary), please let us know and we'll add colourisation support for it.

License

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

Share

About the Author

Paolo Messina
Technical Lead RoboTech srl
Italy Italy
Paolo began programming at the age of 9 with a glorious Olivetti M24 (i8086) and GW-BASIC, then he played a bit with Turbo C, Turbo Pascal and Assembly (using the MS-DOS Debug). Quick BASIC and Visual Basic shortly followed, until he learned C++ in College. He tought himself MFC and Windows programming, along with some DHTML and Javascript.

Always attracted by low-level programming and Assembly, he started to appreciate the joys of templates and STL while working for his Master Thesis. For seven months he was playing with airplanes and automatic control at the Unversity of Illinois at Urbana-Champaign, where he first met QNX and embedded systems.

At work he learned Java to develop user interfaces and graphical editors, and re-discovered the Eclipse IDE that he had used in its early versions with the QNX SDK. There he also deepened his knowledge of Linux and embedded systems, microcontrollers firmware and embedded voice recognition, while also practicing electronics design.

He graduated in Computer Engineering (Ingegneria informatica) at the University of Pisa, Italy, in December 2003. Currently working for an edutainment robotics company (www.robotechsrl.com).

He lives in Peccioli (Pisa) and Follonica (GR), Italy.

You may also be interested in...

| Advertise | Privacy | Terms of Use | Mobile
Web02 | 2.8.160426.1 | Last Updated 15 Jun 2004
Article Copyright 2001 by Paolo Messina
Everything else Copyright © CodeProject, 1999-2016
Layout: fixed | fluid