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added initial support for custom windows
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unified repositioning of all windows (callback and non), now made all at once
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@ppescher
ppescher committed Oct 13, 2002
1 parent b15a319 commit db9f799
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Showing 2 changed files with 85 additions and 30 deletions.
88 changes: 66 additions & 22 deletions ResizableLib/ResizableLayout.cpp
View file
Original file line number Diff line number Diff line change
Expand Up @@ -16,6 +16,7 @@

#include "stdafx.h"
#include "ResizableLayout.h"
#include "ResizableMsgSupport.inl"

#ifdef _DEBUG
#undef THIS_FILE
Expand Down Expand Up @@ -72,15 +73,19 @@ void CResizableLayout::AddAnchor(HWND hWnd, CSize sizeTypeTL, CSize sizeTypeBR)
sizeMarginBR.cx = rectChild.right - rectParent.Width() * sizeTypeBR.cx / 100;
sizeMarginBR.cy = rectChild.bottom - rectParent.Height() * sizeTypeBR.cy / 100;

// add to the list and the map
// prepare the structure
LayoutInfo layout(hWnd, sizeTypeTL, sizeMarginTL,
sizeTypeBR, sizeMarginBR, sClassName);

POSITION pos;
// initialize resize properties (overridable)
InitResizeProperties(layout);

// must not be already there!
// (this is probably due to a duplicate call to AddAnchor)
POSITION pos;
ASSERT(!m_mapLayout.Lookup(hWnd, pos));

// add to the list and the map
pos = m_listLayout.AddTail(layout);
m_mapLayout.SetAt(hWnd, pos);
}
Expand Down Expand Up @@ -116,7 +121,7 @@ void CResizableLayout::ArrangeLayout()
int countCB = m_listLayoutCB.GetCount();

// reposition child windows
HDWP hdwp = ::BeginDeferWindowPos(count);
HDWP hdwp = ::BeginDeferWindowPos(count + countCB);

POSITION pos = m_listLayout.GetHeadPosition();
while (pos != NULL)
Expand All @@ -130,24 +135,20 @@ void CResizableLayout::ArrangeLayout()
// only if size or position changed
if ((uFlags & (SWP_NOMOVE|SWP_NOSIZE)) != (SWP_NOMOVE|SWP_NOSIZE))
{
hdwp = ::DeferWindowPos(hdwp, layout.hWnd, NULL, rectChild.left, rectChild.top,
rectChild.Width(), rectChild.Height(), uFlags);
hdwp = ::DeferWindowPos(hdwp, layout.hWnd, NULL, rectChild.left,
rectChild.top, rectChild.Width(), rectChild.Height(), uFlags);
}
}
::EndDeferWindowPos(hdwp);

// force updating of non-callback windows
// since the others may need it

// reposition callback windows
hdwp = ::BeginDeferWindowPos(countCB);
// for callback items you may use GetAnchorPosition to know the
// new position and size of a non-callback item after resizing

pos = m_listLayoutCB.GetHeadPosition();
while (pos != NULL)
{
// get layout info
layout = m_listLayoutCB.GetNext(pos);
// request data
// request layout data
if (!ArrangeLayoutCallback(layout))
continue;

Expand All @@ -157,10 +158,12 @@ void CResizableLayout::ArrangeLayout()
// only if size or position changed
if ((uFlags & (SWP_NOMOVE|SWP_NOSIZE)) != (SWP_NOMOVE|SWP_NOSIZE))
{
hdwp = ::DeferWindowPos(hdwp, layout.hWnd, NULL, rectChild.left, rectChild.top,
rectChild.Width(), rectChild.Height(), uFlags);
hdwp = ::DeferWindowPos(hdwp, layout.hWnd, NULL, rectChild.left,
rectChild.top, rectChild.Width(), rectChild.Height(), uFlags);
}
}

// finally move all the windows at once
::EndDeferWindowPos(hdwp);
}

Expand All @@ -186,8 +189,12 @@ void CResizableLayout::ClipChildWindow(const CResizableLayout::LayoutInfo& layou
rgn.SetRectRgn(&rect);
}

// go clipping?
if (LikesClipping(layout))
// get the clipping property
BOOL bClipping = layout.properties.bAskClipping ?
LikesClipping(layout) : layout.properties.bCachedLikesClipping;

// modify region accordingly
if (bClipping)
pRegion->CombineRgn(pRegion, &rgn, RGN_DIFF);
else
pRegion->CombineRgn(pRegion, &rgn, RGN_OR);
Expand All @@ -198,7 +205,7 @@ void CResizableLayout::GetClippingRegion(CRgn* pRegion)
CWnd* pWnd = GetResizableWnd();

// System's default clipping area is screen's size,
// not enough for max track size:
// not enough for max track size, for example:
// if screen is 1024 x 768 and resizing border is 4 pixels,
// maximized size is 1024+4*2=1032 x 768+4*2=776,
// but max track size is 4 pixels bigger 1036 x 780 (don't ask me why!)
Expand Down Expand Up @@ -235,7 +242,7 @@ void CResizableLayout::GetClippingRegion(CRgn* pRegion)
ClipChildWindow(layout, pRegion);
}

// fix for RTL layouts (1 pixel too-much)
// fix for RTL layouts (1 pixel of horz offset)
if (pWnd->GetExStyle() & WS_EX_LAYOUTRTL)
pRegion->OffsetRgn(-1,0);
}
Expand All @@ -246,7 +253,9 @@ void CResizableLayout::EraseBackground(CDC* pDC)

// retrieve the background brush
HBRUSH hBrush = NULL;

// is this a dialog box?
// (using class atom is quickier than using the class name)
ATOM atomWndClass = (ATOM)::GetClassLong(hWnd, GCW_ATOM);
if (atomWndClass == (ATOM)0x8002)
{
Expand All @@ -260,6 +269,7 @@ void CResizableLayout::EraseBackground(CDC* pDC)
hBrush = (HBRUSH)::GetClassLong(hWnd, GCL_HBRBACKGROUND);
}

// fill the clipped background
CRgn rgn;
GetClippingRegion(&rgn);

Expand All @@ -284,6 +294,15 @@ void CResizableLayout::GetTotalClientRect(LPRECT lpRect)
BOOL CResizableLayout::NeedsRefresh(const CResizableLayout::LayoutInfo& layout,
const CRect& rectOld, const CRect& rectNew)
{
if (layout.bMsgSupport)
{
REFRESHPROPERTY refresh;
refresh.rcOld = rectOld;
refresh.rcNew = rectNew;
if (Send_NeedsRefresh(layout.hWnd, &refresh))
return refresh.bNeedsRefresh;
}

int nDiffWidth = (rectNew.Width() - rectOld.Width());
int nDiffHeight = (rectNew.Height() - rectOld.Height());

Expand All @@ -295,7 +314,7 @@ BOOL CResizableLayout::NeedsRefresh(const CResizableLayout::LayoutInfo& layout,
BOOL bRefresh = FALSE;

// window classes that need refresh when resized
if (layout.sWndClass == "Static")
if (layout.sWndClass == WC_STATIC)
{
DWORD style = ::GetWindowLong(layout.hWnd, GWL_STYLE);

Expand Down Expand Up @@ -337,7 +356,7 @@ BOOL CResizableLayout::NeedsRefresh(const CResizableLayout::LayoutInfo& layout,
// window classes that don't redraw client area correctly
// when the hor scroll pos changes due to a resizing
BOOL bHScroll = FALSE;
if (layout.sWndClass == "ListBox")
if (layout.sWndClass == WC_LISTBOX)
bHScroll = TRUE;

// fix for horizontally scrollable windows
Expand Down Expand Up @@ -367,6 +386,13 @@ BOOL CResizableLayout::NeedsRefresh(const CResizableLayout::LayoutInfo& layout,

BOOL CResizableLayout::LikesClipping(const CResizableLayout::LayoutInfo& layout)
{
if (layout.bMsgSupport)
{
CLIPPINGPROPERTY clipping;
if (Send_LikesClipping(layout.hWnd, &clipping))
return clipping.bLikesClipping;
}

DWORD style = ::GetWindowLong(layout.hWnd, GWL_STYLE);

// skip windows that wants background repainted
Expand Down Expand Up @@ -450,8 +476,9 @@ void CResizableLayout::CalcNewChildPosition(const CResizableLayout::LayoutInfo&
// adjust position, if client area has been scrolled
rectNew.OffsetRect(rectParent.TopLeft());

// window classes that need refresh when resized
BOOL bRefresh = NeedsRefresh(layout, rectChild, rectNew);
// get the refresh property
BOOL bRefresh = layout.properties.bAskRefresh ?
NeedsRefresh(layout, rectChild, rectNew) : layout.properties.bCachedNeedsRefresh;

// set flags
uFlags = SWP_NOZORDER | SWP_NOACTIVATE | SWP_NOREPOSITION;
Expand All @@ -465,3 +492,20 @@ void CResizableLayout::CalcNewChildPosition(const CResizableLayout::LayoutInfo&
// update rect
rectChild = rectNew;
}

void CResizableLayout::InitResizeProperties(CResizableLayout::LayoutInfo &layout)
{
// check if custom window supports this library
// (properties must be correctly set by the window)
layout.bMsgSupport = Send_QueryProperties(layout.hWnd, &layout.properties);

// default properties
if (!layout.bMsgSupport)
{
// clipping property is assumed as static
layout.properties.bAskClipping = FALSE;
layout.properties.bCachedLikesClipping = LikesClipping(layout);
// refresh property is assumed as dynamic
layout.properties.bAskRefresh = TRUE;
}
}
27 changes: 19 additions & 8 deletions ResizableLib/ResizableLayout.h
View file
Original file line number Diff line number Diff line change
Expand Up @@ -18,6 +18,7 @@
#define AFX_RESIZABLELAYOUT_H__INCLUDED_

#include <afxtempl.h>
#include "ResizableMsgSupport.h"

#if _MSC_VER > 1000
#pragma once
Expand Down Expand Up @@ -49,14 +50,19 @@ class CResizableLayout
// bottom-right corner
SIZE sizeTypeBR;
SIZE sizeMarginBR;

// custom window support
BOOL bMsgSupport;
RESIZEPROPERTIES properties;

public:
LayoutInfo() : hWnd(NULL), nCallbackID(0)
LayoutInfo() : hWnd(NULL), nCallbackID(0), bMsgSupport(FALSE)
{ }

LayoutInfo(HWND hwnd, SIZE tl_t, SIZE tl_m,
SIZE br_t, SIZE br_m, CString classname)
: hWnd(hwnd), nCallbackID(0), sWndClass(classname),
: hWnd(hwnd), nCallbackID(0),
sWndClass(classname), bMsgSupport(FALSE),
sizeTypeTL(tl_t), sizeMarginTL(tl_m),
sizeTypeBR(br_t), sizeMarginBR(br_m)
{ }
Expand All @@ -74,10 +80,13 @@ class CResizableLayout
const CRect &rectParent, CRect &rectChild, UINT& uFlags);

protected:
// override to specify clipping for custom or unsupported windows
// override to initialize resize properties (clipping, refresh)
virtual void InitResizeProperties(CResizableLayout::LayoutInfo& layout);

// override to specify clipping for unsupported windows
virtual BOOL LikesClipping(const CResizableLayout::LayoutInfo &layout);

// override to specify refresh for custom or unsupported windows
// override to specify refresh for unsupported windows
virtual BOOL NeedsRefresh(const CResizableLayout::LayoutInfo &layout,
const CRect &rectOld, const CRect &rectNew);

Expand Down Expand Up @@ -108,22 +117,24 @@ class CResizableLayout

// get rect of an anchored window, given the parent's client area
BOOL GetAnchorPosition(HWND hWnd, const CRect &rectParent,
CRect &rectChild, UINT& uFlags)
CRect &rectChild, UINT* lpFlags = NULL)
{
POSITION pos;
if (!m_mapLayout.Lookup(hWnd, pos))
return FALSE;

CalcNewChildPosition(m_listLayout.GetAt(pos), rectParent, rectChild, uFlags);
UINT uTmpFlags;
CalcNewChildPosition(m_listLayout.GetAt(pos), rectParent, rectChild,
(lpFlags != NULL) ? (*lpFlags) : uTmpFlags);
return TRUE;
}

// get rect of an anchored window, given the parent's client area
BOOL GetAnchorPosition(UINT nID, const CRect &rectParent,
CRect &rectChild, UINT& uFlags)
CRect &rectChild, UINT* lpFlags = NULL)
{
return GetAnchorPosition(::GetDlgItem(GetResizableWnd()->GetSafeHwnd(), nID),
rectParent, rectChild, uFlags);
rectParent, rectChild, lpFlags);
}

// remove an anchored control from the layout, given its HWND
Expand Down

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