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// 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;
}
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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.
In his job experience 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. 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 electronics and robotics company (
www.robotechsrl.com).
He lives in Pisa and in Follonica (GR), Italy.