SurfHelper: A popup window killer and history cleaner

////////////////////////////////////////////////////////////////////////
// DlgItemResizer.cpp : implementation file
//	
// Written by Magnus Egelberg (magnus.egelberg@lundalogik.se)
// Much of this code comes from Eli Vingot (elivingt@internet-zahav.net)
// 
//

#include "stdafx.h"
#include "DlgItemResizer.h"

CDlgItemResizer::CDlgItemResizer()
{
	m_szInitial = CSize(0,0);
}

CDlgItemResizer::~CDlgItemResizer()
{
	// Make sure to delete all allocated items
	for (INT i = 0; i < m_vecControls.size(); i++)
	{
		delete m_vecControls[i];
	}
}

void CDlgItemResizer::Add(HWND hWnd, UINT uFlags)
{
	HWND hParent = GetParent(hWnd);

	if (uFlags == 0)
		return; 

	CRect rc;
	GetWindowRect(hWnd, &rc);
	ScreenToClient(hParent, &rc);

	DLGITEMINFO *item    = new DLGITEMINFO;
	item->m_uFlags       = uFlags;
	item->m_hWnd         = hWnd;
	item->m_rectPosition = rc;

	// Set inital size if not set
	if (m_szInitial.cx == 0 || m_szInitial.cy == 0)
	{
		CRect rc;
		GetClientRect(hParent, &rc);
		m_szInitial = rc.Size();
	}

	// Add it to the array
	m_vecControls.push_back(item);
}

void CDlgItemResizer::Resize(HWND hWnd)
{
	// Just return if no initial size yet
	if (m_szInitial.cx == 0 || m_szInitial.cy == 0)
		return;

	// Don't bother to resize minimized windows
	if (GetWindowLong(hWnd, GWL_STYLE) & WS_MINIMIZE)
		return;

	CRect client;
	GetClientRect(hWnd, &client);

	for (INT i = 0; i < m_vecControls.size(); i++)
	{
		DLGITEMINFO *item = (DLGITEMINFO *)m_vecControls[i];

		// Invalidate the old position
		CRect rect;
		GetWindowRect(item->m_hWnd, &rect);  
		ScreenToClient(hWnd, &rect);
		InvalidateRect(hWnd, &rect, TRUE);

		// Get the current size of the control
		CSize size = rect.Size();

		// Set the new position according to the flags specified
		if ((item->m_uFlags & (RESIZE_LOCKLEFT|RESIZE_LOCKRIGHT)) == 
			(RESIZE_LOCKLEFT|RESIZE_LOCKRIGHT))
		{
			rect.left = item->m_rectPosition.left;
			rect.right = client.right - 
				(m_szInitial.cx - item->m_rectPosition.right);
		}
		else if (item->m_uFlags & RESIZE_LOCKRIGHT)
		{
			rect.right = client.right - 
				(m_szInitial.cx - item->m_rectPosition.right);
			rect.left  = rect.right - size.cx;
		}
		else if (item->m_uFlags & RESIZE_LOCKLEFT)
		{
			rect.left  = item->m_rectPosition.left;
			rect.right = rect.left + size.cx;
		}

		if ((item->m_uFlags & (RESIZE_LOCKTOP|RESIZE_LOCKBOTTOM)) == 
			(RESIZE_LOCKTOP|RESIZE_LOCKBOTTOM))
		{
			rect.top = item->m_rectPosition.top;
			rect.bottom = client.bottom - 
				(m_szInitial.cy - item->m_rectPosition.bottom);
		}
		else if (item->m_uFlags & RESIZE_LOCKTOP)
		{
			rect.top = item->m_rectPosition.top;
			rect.bottom = rect.top + size.cy;
		}
		else if (item->m_uFlags & RESIZE_LOCKBOTTOM)
		{
			rect.bottom = client.bottom - 
				(m_szInitial.cy - item->m_rectPosition.bottom);
			rect.top = rect.bottom - size.cy;
		}

		// Check if control is completely inside client, hide if not
		// Do this only when the RESIZE_SHOWHIDE flag is set.
		if (item->m_uFlags & RESIZE_SHOWHIDE)
		{
			CRect unionrect;
			unionrect.UnionRect(rect, client);

			if (unionrect != client)
			{
				ShowWindow(item->m_hWnd, SW_HIDE);
			}
			else
			{
				// Make sure it is visible
				if (!IsWindowVisible(item->m_hWnd))
				{
					ShowWindow(item->m_hWnd, SW_SHOWNORMAL);
				}
				MoveWindow(item->m_hWnd, rect.left, rect.top,
					rect.Width(), rect.Height(), TRUE);
			}
		}
		else
		{
			MoveWindow(item->m_hWnd, rect.left, rect.top,
				rect.Width(), rect.Height(), TRUE);
		}
	}
}

void CDlgItemResizer::ScreenToClient(HWND hWnd, CRect* pRect)
{
	CPoint point;

	point.x = pRect->left;
	point.y = pRect->top;
	::ScreenToClient(hWnd, &point);
	pRect->left = point.x;
	pRect->top = point.y;

	point.x = pRect->right;
	point.y = pRect->bottom;
	::ScreenToClient(hWnd, &point);
	pRect->right = point.x;
	pRect->bottom = point.y;
}