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XListCtrl - A custom-draw list control with subitem formatting

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4.92 (261 votes)
6 Sep 2006CPOL
A custom-draw list control with support for subitem colors, bold font, progress bars, and checkboxes.
PropertySheet
hans.ico
PropertySheet.dsp
XListCtrl
checkboxes.bmp
XListCtrlLib
XListCtrlDD.dsp
XListCtrlDS.dsp
XListCtrlSS.dsp
DialogDSRA.exe
XListCtrlTest.dsw
Dialog
checkboxes.bmp
DialogDD.dsp
DialogDS.dsp
DialogSS.dsp
hans.ico
MDI
Doc.ico
hans.ico
MDI.dsp
Toolbar.bmp
XListViewDoc.ico
XListView.exe
checkboxes.bmp
Toolbar.bmp
XListView.dsp
XListView.dsw
XListView.ico
/////////////////////////////////////////////////////////////////////////////
// DropWnd.cpp : implementation file
// 
// CAdvComboBox Control
// Version: 2.1
// Date: September 2002
// Author: Mathias Tunared
// Email: Mathias@inorbit.com
// Copyright (c) 2002. All Rights Reserved.
//
// This code, in compiled form or as source code, may be redistributed 
// unmodified PROVIDING it is not sold for profit without the authors 
// written consent, and providing that this notice and the authors name 
// and all copyright notices remains intact.
//
// This file is provided "as is" with no expressed or implied warranty.
// The author accepts no liability for any damage/loss of business that
// this product may cause.
//
/////////////////////////////////////////////////////////////////////////////

#include "stdafx.h"
#include "DropWnd.h"
#include "AdvComboBox.h"
#include "DropListBox.h"
#include "VisualStylesXP.h"

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

/////////////////////////////////////////////////////////////////////////////
// CDropWnd

CDropWnd::CDropWnd( CWnd* pComboParent, list<LIST_ITEM> &itemlist, DWORD dwACBStyle )
:
	m_pComboParent( pComboParent ),
	m_list( itemlist ),
	m_dwACBStyle( dwACBStyle ),
	m_nMaxX(1000),	//+++
	m_nMaxY(1000)	//+++
{
	m_bResizing = false;

	m_pListFont = new CFont;
	LOGFONT logFont;
	memset( &logFont, 0, sizeof(LOGFONT) );
	_tcscpy( logFont.lfFaceName, _T("MS Sans Serif") );
	logFont.lfHeight = 12;
	m_pListFont->CreateFontIndirect(&logFont);
}

CDropWnd::~CDropWnd()
{
	delete m_pListFont;
	delete m_scrollbar;
	delete m_listbox;
}

BEGIN_MESSAGE_MAP(CDropWnd, CWnd)
	//{{AFX_MSG_MAP(CDropWnd)
	ON_WM_CREATE()
	ON_WM_MOUSEMOVE()
	ON_WM_LBUTTONDOWN()
	ON_WM_SIZE()
	ON_WM_PAINT()
	ON_WM_LBUTTONUP()
	ON_WM_SHOWWINDOW()
	ON_WM_ACTIVATEAPP()
	ON_WM_ERASEBKGND()
	//}}AFX_MSG_MAP
	ON_MESSAGE( WM_VRC_SETCAPTURE, OnSetCapture )
	ON_MESSAGE( WM_VRC_RELEASECAPTURE, OnReleaseCapture )
END_MESSAGE_MAP()


/////////////////////////////////////////////////////////////////////////////
// CDropWnd message handlers

BOOL CDropWnd::PreCreateWindow(CREATESTRUCT& cs) 
{
	//
	// Calc the size of the wnd
	
	return CWnd::PreCreateWindow(cs);
}

#if 0  // -----------------------------------------------------------
BOOL CDropWnd::Create(DWORD dwStyle, 
					  const RECT& rect, 
					  CWnd* pParentWnd, 
					  UINT nID, 
					  CCreateContext* pContext) 
{
	return CWnd::Create(0, 0, dwStyle, rect, pParentWnd, nID, pContext);
}
#endif // -----------------------------------------------------------

int CDropWnd::OnCreate(LPCREATESTRUCT lpCreateStruct) 
{
	if (CWnd::OnCreate(lpCreateStruct) == -1)
		return -1;
	
	CRect rcWnd;
	GetClientRect( &rcWnd );

	//
	// Because this window doesn't have an owner, there will appear 
	// a 'blank' button on the taskbar. The following are to hide 
	// that 'blank' button on the taskbar
	ModifyStyleEx( 0, WS_EX_TOOLWINDOW );
	SetWindowPos( &wndTopMost, lpCreateStruct->x, lpCreateStruct->y, 
		lpCreateStruct->cx, lpCreateStruct->cy, SWP_SHOWWINDOW );

	//
	// Create scrollbar
	m_rcScroll = rcWnd;
	m_rcScroll.left = m_rcScroll.right - ::GetSystemMetrics(SM_CXVSCROLL);
	m_rcScroll.bottom -= ::GetSystemMetrics(SM_CYVSCROLL);
	m_scrollbar = new CDropScrollBar;
	VERIFY(m_scrollbar->Create( SBS_VERT | SBS_RIGHTALIGN | WS_CHILD, m_rcScroll, this, 100));

	//
	// Create listbox
	m_rcList.SetRect( lpCreateStruct->x, lpCreateStruct->y, 
		lpCreateStruct->x+lpCreateStruct->cx-::GetSystemMetrics(SM_CXVSCROLL), 
		lpCreateStruct->y+lpCreateStruct->cy );
	ScreenToClient( m_rcList );
	m_listbox = new CDropListBox(m_pComboParent, m_scrollbar);
	VERIFY(m_listbox->Create( WS_CHILD | LBS_NOINTEGRALHEIGHT 
		/*| WS_VISIBLE | */ /*| LBS_OWNERDRAWFIXED*/, 
		m_rcList, this, 101 ) );
	m_listbox->SetDLBStyle( m_dwACBStyle );
	m_listbox->ShowWindow( SW_SHOW );

	//
	// Resize this wnd so INTEGRAL_HEIGHT applies!?
	CRect rc;
	int nH = m_listbox->GetItemHeight(0);
	nH = nH*m_list.size()+2;
	// Get screen size
	int nScrX = GetSystemMetrics( SM_CXSCREEN );
	int nScrY = GetSystemMetrics( SM_CYSCREEN );

	int nDefaultItems = static_cast<CAdvComboBox*>(m_pComboParent)->GetDefaultVisibleItems();

	//
	// Check to see if the window should be placed over the combobox
	int nY = lpCreateStruct->y;
	int nItems = m_list.size();
	int nItemHeight = m_listbox->GetItemHeight(0);
	int nVisHeight = nScrY - lpCreateStruct->y;
	CRect rcCombo;
	m_pComboParent->GetWindowRect( &rcCombo );
	if( (nVisHeight / nItemHeight) < static_cast<CAdvComboBox*>(m_pComboParent)->GetMinVisibleItems() )
	{
		int nComboTopY = lpCreateStruct->y - rcCombo.Height();
		if( nDefaultItems == -1 || nDefaultItems > nItems )
		{
			nY = (nComboTopY - nH) < 0 ? 0 : (nComboTopY - nH);
			nH = (nY + nH) > nComboTopY ? nComboTopY - nY : nH;
		}
		else
		{
			nY = nComboTopY - nItemHeight*nDefaultItems;
			nY -= 2;
			nY = nY < 0 ? 0 : nY;
			nH = nComboTopY - nY;
		}
	}
	else
	{
		//
		// Place the window below the combo
		// Check height
		if( nDefaultItems == -1 || nDefaultItems > nItems )
		{
			if( lpCreateStruct->y + nH > nScrY )
			{
				nH = nScrY - lpCreateStruct->y;
			}
			else
			if( nH < ::GetSystemMetrics(SM_CYVSCROLL) )
			{
				nH = ::GetSystemMetrics(SM_CYVSCROLL);
			}
		}
		else
		{
			nH = nDefaultItems * nItemHeight;
			nH = (nY+nH) > nScrY ? nScrY-nY : nH;
			nH += 2;
		}
	}

	// Calc width
	int nW = 0;
	CSize size(0,0);
	for( m_iter = m_list.begin(); m_iter != m_list.end(); ++m_iter )
	{
		m_listbox->GetTextSize( m_iter->strText.c_str(), m_iter->strText.length(), size );
		nW = (size.cx > nW) ? size.cx : nW;
	}

	nW += m_rcScroll.Width() + 8;

	// Check min width
	if( nW < m_rcList.Width() )
	{
		nW = lpCreateStruct->cx;
	}

	//+++
	if (nW < rcCombo.Width())
		nW = rcCombo.Width();

	// Check max width
	int nX = lpCreateStruct->x;
	if( nW > nScrX - lpCreateStruct->x )
	{
		nX = nScrX - nW;
		if( nX < 0 )
			nX = 0;
	}
	if( nX == 0 && nW > nScrX )
		nW = nScrX;

	//nW += 4;			//+++
	m_nMaxX = nW + 100;	//+++
	m_nMaxY = nH + 100;	//+++

	SetWindowPos( &wndTopMost, nX, nY, nW, nH, SWP_SHOWWINDOW|SWP_NOZORDER );

	GetClientRect( &rcWnd );

	//
	// Create sizehandle
	m_rcSizeHandle = rcWnd;
	GetClientRect( &m_rcSizeHandle );
	m_rcSizeHandle.left = m_rcSizeHandle.right - ::GetSystemMetrics(SM_CXVSCROLL);
	m_rcSizeHandle.top = m_rcSizeHandle.bottom - ::GetSystemMetrics(SM_CYVSCROLL);

	//
	// Add items to listbox
	LIST_ITEM item;
	for( m_iter = m_list.begin(); m_iter != m_list.end(); ++m_iter )
	{
		item = *m_iter;
		m_listbox->AddListItem( item );
	}

	//
	// Set values in scrollbar
	m_scrollbar->SetListBox( m_listbox );
	m_scrollbar->ShowScrollBar();

	//
	//
	SetCapture();
	return 0;
}

LONG CDropWnd::OnSetCapture( WPARAM /*wParam*/, LPARAM /*lParam*/ )
{
	SetCapture();
	return FALSE;
}

LONG CDropWnd::OnReleaseCapture( WPARAM /*wParam*/, LPARAM /*lParam*/ )
{
	ReleaseCapture();
	return FALSE;
}

void CDropWnd::OnMouseMove(UINT nFlags, CPoint point) 
{
	//
	//
	if( m_bResizing )
	{
		CRect rcWnd;
		GetWindowRect( &rcWnd );
#if 0  // -----------------------------------------------------------
		if( point.x + m_nMouseDiffX >= ::GetSystemMetrics(SM_CXVSCROLL) )
		{
			rcWnd.right = rcWnd.left + point.x + m_nMouseDiffX +2;
		}
		else
		{
			rcWnd.right = rcWnd.left + ::GetSystemMetrics(SM_CXVSCROLL) +1;
		}

		if( point.y + m_nMouseDiffY >= ::GetSystemMetrics(SM_CYVSCROLL) )
		{
			rcWnd.bottom = rcWnd.top + point.y + m_nMouseDiffY +2;
		}
		else
		{
			rcWnd.bottom = rcWnd.top + ::GetSystemMetrics(SM_CXVSCROLL) +1;
		}
#endif // -----------------------------------------------------------

		//+++
		CRect rcCombo;
		m_pComboParent->GetWindowRect( &rcCombo );

		if( point.x + m_nMouseDiffX < rcCombo.Width())
		{
			rcWnd.right = rcWnd.left + rcCombo.Width();
		}
		else if (point.x + m_nMouseDiffX > m_nMaxX)
		{
			rcWnd.right = rcWnd.left + m_nMaxX;
		}
		else
		{
			rcWnd.right = rcWnd.left + point.x + m_nMouseDiffX;
		}

		if( point.y + m_nMouseDiffY < :: GetSystemMetrics(SM_CYVSCROLL) )
		{
			rcWnd.bottom = rcWnd.top + ::GetSystemMetrics(SM_CXVSCROLL) +1;
		}
		else if ( point.y + m_nMouseDiffY > m_nMaxY )
		{
			rcWnd.bottom = rcWnd.top + m_nMaxY;
		}
		else
		{
			rcWnd.bottom = rcWnd.top + point.y + m_nMouseDiffY +2;
		}


		MoveWindow( &rcWnd );
		return;
	}

	//
	// Check point
	if( m_rcList.PtInRect( point ) )
	{
		HCURSOR hCursor = LoadCursor( NULL, IDC_ARROW );
		SetCursor( hCursor );
		ReleaseCapture();
		m_scrollbar->SendMessage( WM_VRC_RELEASECAPTURE );
		m_listbox->SetFocus();
		m_listbox->SendMessage( WM_VRC_SETCAPTURE );
	}
	else
	if( m_rcScroll.PtInRect( point ) )
	{
		HCURSOR hCursor = LoadCursor( NULL, IDC_ARROW );
		SetCursor( hCursor );
		m_scrollbar->SetFocus();
		ReleaseCapture();
		m_listbox->SendMessage( WM_VRC_RELEASECAPTURE );
		m_scrollbar->SendMessage( WM_VRC_SETCAPTURE );
	}
	else
	{
		if( m_rcSizeHandle.PtInRect( point ) )
		{
			HCURSOR hCursor = LoadCursor( NULL, IDC_SIZENWSE );
			SetCursor( hCursor );
		}
		else
		{
			HCURSOR hCursor = LoadCursor( NULL, IDC_ARROW );
			SetCursor( hCursor );
		}
		SetCapture();
		CWnd::OnMouseMove(nFlags, point);
	}
}

void CDropWnd::OnLButtonDown(UINT nFlags, CPoint point) 
{
	XLISTCTRL_TRACE(_T("in CDropWnd::OnLButtonDown\n"));
	if( m_rcSizeHandle.PtInRect( point ) )
	{
		m_bResizing = true;

		m_ptLastResize = point;

		CRect rcClient;
		GetClientRect( &rcClient );
		m_nMouseDiffX = rcClient.Width() - point.x;
		m_nMouseDiffY = rcClient.Height() - point.y;
		return;
	}

//
// Clean up the code below...
//

	CRect rc;
	CRect rcVScroll(0,0,0,0);
	GetClientRect( &rc );
	
	// Take away vertical scroll

	if( rc.PtInRect( point ) )
	{
	}
	else
	{
		//
		// Calc the point in the parent(PropertyListBox)
		CWnd* pParent = m_pComboParent->GetParent();
		CRect rcParentClient;
		CRect rcParentWnd;
		pParent->GetClientRect( &rcParentClient );
		pParent->GetWindowRect( &rcParentWnd );

		CPoint pt = point;
		ClientToScreen( &pt );
			pt.x -= rcParentWnd.left;
			pt.y -= rcParentWnd.top;

		CAdvComboBox* pList = static_cast<CAdvComboBox*>(m_pComboParent);
		if( !pList->PointInWindow( pt ) )
		{
			
			ReleaseCapture();

			m_pComboParent->PostMessage( WM_DESTROY_DROPLIST );
		}
		else
		{
			ReleaseCapture();
			m_pComboParent->PostMessage( WM_DESTROY_DROPLIST );
		}
	}

	LPARAM l = MAKELPARAM(point.x, point.y);
	m_pComboParent->SendMessage(WM_LBUTTONDOWN, nFlags, l);

	CWnd::OnLButtonDown(nFlags, point);
}

void CDropWnd::OnLButtonUp(UINT nFlags, CPoint point) 
{
	if( m_bResizing )
	{
		m_bResizing = false;
		m_listbox->UnlockWindowUpdate();

		m_listbox->RedrawWindow();
	}
	CWnd::OnLButtonUp(nFlags, point);
}

void CDropWnd::OnSize(UINT nType, int cx, int cy) 
{
	CWnd::OnSize(nType, cx, cy);

	m_rcList.SetRect( 0, 0, cx-::GetSystemMetrics(SM_CXVSCROLL), cy );
	CRect rectBorder = m_rcList;
	m_rcList.DeflateRect(1, 1);
	m_listbox->MoveWindow( &m_rcList );

	m_rcScroll.SetRect( cx-::GetSystemMetrics(SM_CXVSCROLL), 0, cx, cy-::GetSystemMetrics(SM_CYVSCROLL) );
	m_rcScroll.DeflateRect(1, 1);
	m_scrollbar->MoveWindow( &m_rcScroll );

	//?????  +++
	rectBorder.right = m_rcScroll.right + 1;
	//CPen pen(PS_SOLID, 1, ::GetSysColor(COLOR_BTNSHADOW));//COLOR_INACTIVECAPTION));	// same as combobox
	CPen pen(PS_SOLID, 1, ::GetSysColor(COLOR_3DDKSHADOW));//COLOR_INACTIVECAPTION));	// same as combobox
	CDC * pDC = GetDC();
	CPen *pOldPen = pDC->SelectObject(&pen);
	pDC->Rectangle(&rectBorder);
	pDC->SelectObject(pOldPen);
	ReleaseDC(pDC);

	m_rcSizeHandle.SetRect( cx-::GetSystemMetrics(SM_CXVSCROLL), cy-::GetSystemMetrics(SM_CYVSCROLL), cx, cy );
	m_rcSizeHandle.DeflateRect(1, 1);
	InvalidateRect( &m_rcSizeHandle );

	//
	// Fix the scrollbar
	SCROLLINFO info;
	info.cbSize = sizeof(SCROLLINFO);
	if( m_scrollbar->GetScrollInfo( &info, SIF_ALL|SIF_DISABLENOSCROLL ) )
	{
		info.nPage = m_listbox->GetBottomIndex() - m_listbox->GetTopIndex();
		m_scrollbar->SetScrollInfo( &info );
	}
}

void CDropWnd::OnPaint() 
{
	CPaintDC dc(this); // device context for painting
	
	if( g_xpStyle.UseVisualStyles() )
	{
		HTHEME hTheme = NULL;
		hTheme = g_xpStyle.OpenThemeData( m_hWnd, L"SCROLLBAR" );
		HRESULT hr = g_xpStyle.DrawThemeBackground( hTheme, dc.m_hDC, SBP_LOWERTRACKVERT, SCRBS_NORMAL, &m_rcSizeHandle, NULL);
		hr = g_xpStyle.DrawThemeBackground( hTheme, dc.m_hDC, SBP_SIZEBOX, SZB_RIGHTALIGN, &m_rcSizeHandle, NULL);
		hr = g_xpStyle.CloseThemeData( hTheme );

	}
	else
	{
		dc.DrawFrameControl(m_rcSizeHandle, DFC_SCROLL, DFCS_SCROLLSIZEGRIP );
	}

	// Do not call CWnd::OnPaint() for painting messages
}


BOOL CDropWnd::DestroyWindow() 
{
	ReleaseCapture();
	m_listbox->DestroyWindow();
	
	return CWnd::DestroyWindow();
}

void CDropWnd::OnShowWindow(BOOL bShow, UINT nStatus) 
{
	CWnd::OnShowWindow(bShow, nStatus);
	
	if( bShow )
	{
//		AnimateWindow( GetSafeHwnd(), 80, AW_VER_POSITIVE | AW_ACTIVATE | AW_SLIDE);
	}
	else
	{
//		AnimateWindow( GetSafeHwnd(), 80, AW_VER_NEGATIVE | AW_HIDE | AW_SLIDE);
	}
	
}

//+++
#if (_MSC_VER > 1200)
void CDropWnd::OnActivateApp(BOOL bActive, DWORD dwThreadID) 
{
	CWnd::OnActivateApp(bActive, dwThreadID);
#else
 void CDropWnd::OnActivateApp(BOOL bActive, HTASK hTask) 
{
	CWnd::OnActivateApp(bActive, hTask);
#endif

	if(!bActive) 
	{
		m_pComboParent->PostMessage(WM_DESTROY_DROPLIST);
	}
}

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

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About the Author

Hans Dietrich
Software Developer (Senior) Hans Dietrich Software
United States United States
I attended St. Michael's College of the University of Toronto, with the intention of becoming a priest. A friend in the University's Computer Science Department got me interested in programming, and I have been hooked ever since.

Recently, I have moved to Los Angeles where I am doing consulting and development work.

For consulting and custom software development, please see www.hdsoft.org.






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