CJFlatComboBox.cpp

// CJFlatComboBox.cpp : implementation file
//
// Copyright © 1998-99 Kirk W. Stowell
//		mailto:kstowell@codejockeys.com
//		http://www.codejockeys.com/kstowell/
//
// This code may be used in compiled form in any way you desire. This
// file may be redistributed unmodified by any means 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. If the source code in this file is used in 
// any  commercial application then a statement along the lines of 
// "Portions Copyright © 1998 Kirk Stowell" must be included in 
// the startup banner, "About" box or printed documentation. An email 
// letting me know that you are using it would be nice as well. That's 
// not much to ask considering the amount of work that went into this.
//
// 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.
//
// Expect bugs!
// 
// Please use and enjoy, and let me know of any bugs/mods/improvements 
// that you have found/implemented and I will fix/incorporate them into 
// this file. 
//
/////////////////////////////////////////////////////////////////////////////
/****************************************************************************
 *
 * $Date: 5/17/99 9:24p $
 * $Revision: 9 $
 * $Archive: /CodeJockey/CJ60Lib/CJFlatComboBox.cpp $
 *
 * $History: CJFlatComboBox.cpp $
 * 
 * *****************  Version 9  *****************
 * User: Kirk Stowell Date: 5/17/99    Time: 9:24p
 * Updated in $/CodeJockey/CJ60Lib
 * Gilberto Botaro [seafox@techno.com.br] - Added code for auto
 * completion.
 * 
 * *****************  Version 8  *****************
 * User: Kirk Stowell Date: 5/03/99    Time: 10:44p
 * Updated in $/CodeJockey/CJ60Lib
 * Fixed code ommisions.
 * 
 * *****************  Version 7  *****************
 * User: Kirk Stowell Date: 5/03/99    Time: 8:42p
 * Updated in $/CodeJockey/CJ60Lib
 * Danilo Lax [Danilo_Lax@www2.alpeng.com] - The control is painted flat
 * when the mouse leaves the box, even if the control has the focus, now
 * checking for the focus in OnTimer(.
 * 
 * Removed, unhandled msgs are processed by
 * CComboBox::PreTranslateMessage(pMsg). Used reflected msgs
 * BN_GETFOCUS/CBN_KILLFOCUS instead of WM_GETFOCUS/WM_KILLFOCUS.
 * 
 * ::GetFocus() doesn't return CFlatComboBox::m_hWnd, even if the control
 * has the focus (don't know why, maybe ::GetFocus() only returns the
 * handle to the EditField part of the ComboBox), used flag m_bHasFocus
 * instead.
 * 
 * *****************  Version 6  *****************
 * User: Kirk Stowell Date: 4/03/99    Time: 4:26p
 * Updated in $/CodeJockey/CJ60Lib
 * Added comments and cleaned up code.
 * 
 * *****************  Version 5  *****************
 * User: Kirk Stowell Date: 1/22/99    Time: 4:26p
 * Updated in $/CodeJockey/CJ60Lib
 * Fixed accelerator problem reported by YOSH YAMASHITA
 * (yosh@muj.biglobe.ne.jp) with Matt Weagle's solution of overloading
 * PreTranslateMessage().
 * 
 * *****************  Version 4  *****************
 * User: Kirk Stowell Date: 1/02/99    Time: 4:25p
 * Updated in $/CodeJockey/CJ60Lib
 * Renamed class from CJComboBox to CCJFlatComboBox, changed DRAWSTATE to
 * enum, removed method Offset(), and replaced with a direct call to
 * ::GetSystemMetrics().
 * 
 * *****************  Version 3  *****************
 * User: Kirk Stowell Date: 11/02/98   Time: 4:24p
 * Updated in $/CodeJockey/CJ60Lib
 * Added OnSetFocus(), OnKillFocus() and modified OnPaint() so the control
 * remains beveled until it actually looses focus - (Vachik
 * Hovhannissian).
 * 
 * *****************  Version 2  *****************
 * User: Kirk Stowell Date: 10/05/98   Time: 4:24p
 * Updated in $/CodeJockey/CJ60Lib
 * Fixed offset bug to use GetSystemMetrics(), instead of hard coded
 * values -
 * Todd Brannam (tbrannam@msn.com).
 * 
 * *****************  Version 1  *****************
 * User: Kirk Stowell Date: 10/02/98   Time: 4:23p
 * Created in $/CodeJockey/CJ60Lib
 * First release version.
 *
 ***************************************************************************/
/////////////////////////////////////////////////////////////////////////////

#include "stdafx.h"
#include "CJFlatComboBox.h"

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

/////////////////////////////////////////////////////////////////////////////
// CCJFlatComboBox

CCJFlatComboBox::CCJFlatComboBox()
{
	m_bLBtnDown	= FALSE;
	m_bPainted	= FALSE;
	m_bHasFocus	= FALSE;
	m_bAutoComp = TRUE;

	m_clrBtnHilite  = ::GetSysColor(COLOR_BTNHILIGHT);
	m_clrBtnShadow  = ::GetSysColor(COLOR_BTNSHADOW);
	m_clrBtnFace    = ::GetSysColor(COLOR_BTNFACE);
	m_nOffset		= ::GetSystemMetrics(SM_CXHTHUMB);
}

CCJFlatComboBox::~CCJFlatComboBox()
{
}

IMPLEMENT_DYNAMIC(CCJFlatComboBox, CComboBox)

BEGIN_MESSAGE_MAP(CCJFlatComboBox, CComboBox)
	//{{AFX_MSG_MAP(CCJFlatComboBox)
	ON_WM_MOUSEMOVE()
	ON_WM_LBUTTONDOWN()
	ON_WM_LBUTTONUP()
	ON_WM_TIMER()
	ON_WM_PAINT()
	ON_CONTROL_REFLECT(CBN_SETFOCUS,   OnSetFocus)
	ON_CONTROL_REFLECT(CBN_KILLFOCUS,  OnKillFocus)
	ON_CONTROL_REFLECT(CBN_EDITUPDATE, OnEditUpdate)
	ON_WM_SYSCOLORCHANGE()
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CCJFlatComboBox message handlers

void CCJFlatComboBox::OnMouseMove(UINT nFlags, CPoint point) 
{
//	SetTimer(1,10,NULL);
//	OnTimer(1);
	CComboBox::OnMouseMove(nFlags, point);
}

void CCJFlatComboBox::OnLButtonDown(UINT nFlags, CPoint point) 
{
	m_bLBtnDown = TRUE;
	CComboBox::OnLButtonDown(nFlags, point);
}

void CCJFlatComboBox::OnLButtonUp(UINT nFlags, CPoint point) 
{
	m_bLBtnDown = FALSE;
	Invalidate();
	CComboBox::OnLButtonUp(nFlags, point);
}

void CCJFlatComboBox::OnTimer(UINT nIDEvent) 
{
	POINT pt;
	GetCursorPos(&pt);
	CRect rcItem;
	GetWindowRect(&rcItem);

	// OnLButtonDown, show pressed.
	if (m_bLBtnDown==TRUE) {
		KillTimer (1);
		if (m_bPainted == TRUE) {
			DrawCombo( pressed, m_clrBtnShadow, m_clrBtnHilite );
			m_bPainted = FALSE;
		}
		return;
	}

	// If mouse leaves, show flat.
	if (!rcItem.PtInRect(pt) && !m_bHasFocus) {
		KillTimer (1);
		if (m_bPainted == TRUE) {
			DrawCombo( normal, m_clrBtnFace, m_clrBtnFace );
			m_bPainted = FALSE;
		}
		return;
	}

	// On mouse over, show raised.
	else {
		if (m_bPainted == TRUE)
			return;
		else {
			m_bPainted = TRUE;
			DrawCombo( raised, m_clrBtnShadow, m_clrBtnHilite );
		}
	}
	
	CComboBox::OnTimer(nIDEvent);
}

void CCJFlatComboBox::OnPaint() 
{
	ModifyStyleEx (WS_EX_DLGMODALFRAME | WS_EX_CLIENTEDGE | WS_EX_STATICEDGE,
		0, SWP_FRAMECHANGED);
	
	Default();

	CPoint pt;
	GetCursorPos(&pt);

	CRect rcItem;
	GetWindowRect(&rcItem);

	/*
	if ((rcItem.PtInRect(pt)) || m_bHasFocus)
		DrawCombo( raised, m_clrBtnShadow, m_clrBtnHilite );
	else
		DrawCombo( normal, m_clrBtnFace, m_clrBtnFace );
	*/

	if (IsWindowEnabled ())
		DrawCombo (raised, m_clrBtnShadow, m_clrBtnHilite);
	else
		DrawCombo (normal, m_clrBtnFace, m_clrBtnFace);
}

void CCJFlatComboBox::DrawCombo(STATE eState, COLORREF clrTopLeft, COLORREF clrBottomRight)
{
	CRect rcItem;
	GetClientRect(&rcItem);
	CDC* pDC = GetDC();
	
	// Cover up dark 3D shadow.
	pDC->Draw3dRect(rcItem, clrTopLeft, clrBottomRight);
	rcItem.DeflateRect(1,1);
	
	if (!IsWindowEnabled()) {
		pDC->Draw3dRect( rcItem, m_clrBtnHilite, m_clrBtnHilite );
	}
	
	else {
		pDC->Draw3dRect( rcItem, m_clrBtnFace, m_clrBtnFace );
	}

	// Cover up dark 3D shadow on drop arrow.
	rcItem.DeflateRect(1,1);
	rcItem.left = rcItem.right-m_nOffset;
	pDC->Draw3dRect( rcItem, m_clrBtnFace, m_clrBtnFace );
	
	// Cover up normal 3D shadow on drop arrow.
	rcItem.DeflateRect(1,1);
	pDC->Draw3dRect( rcItem, m_clrBtnFace, m_clrBtnFace );
	
	if (!IsWindowEnabled()) {
		ReleaseDC(pDC);	// mch
		return;
	}

	rcItem.right++;		// mch 6.2.02: too large border on right side -> increment right

	switch (eState)
	{
	case normal:
		rcItem.top -= 1;
		rcItem.bottom += 1;
		pDC->Draw3dRect( rcItem, m_clrBtnHilite, m_clrBtnHilite );
		rcItem.left -= 1;
		pDC->Draw3dRect( rcItem, m_clrBtnHilite, m_clrBtnHilite );
		break;

	case raised:
		rcItem.top -= 1;
		rcItem.bottom += 1;
		pDC->Draw3dRect( rcItem, m_clrBtnHilite, m_clrBtnShadow);
		break;

	case pressed:
		rcItem.top -= 1;
		rcItem.bottom += 1;
		rcItem.OffsetRect(1,1);
		pDC->Draw3dRect( rcItem, m_clrBtnShadow, m_clrBtnHilite );
		break;
	}

	ReleaseDC(pDC);
}

void CCJFlatComboBox::OnSetFocus()
{
	m_bHasFocus = TRUE;
	DrawCombo( raised, m_clrBtnShadow, m_clrBtnHilite );
}

void CCJFlatComboBox::OnKillFocus() 
{
	m_bHasFocus = FALSE;
	DrawCombo( /*normal*/raised, m_clrBtnFace, m_clrBtnFace );
}

BOOL CCJFlatComboBox::PreTranslateMessage(MSG* pMsg) 
{
	// Catch the Alt key so we don't choke if focus 
	// is going to an owner drawn button
	if (pMsg->message == WM_SYSCHAR)
		return TRUE;
		
	return CComboBox::PreTranslateMessage(pMsg);
}

void CCJFlatComboBox::OnEditUpdate() 
{
	// if we are not to auto update the text, get outta here
	if (!m_bAutoComp) 
		return;
	
	// Get the text in the edit box
	CString str;
	GetWindowText(str);
	int nLength = str.GetLength();
	
	// Currently selected range
	DWORD dwCurSel = GetEditSel();
	WORD dStart = LOWORD(dwCurSel);
	WORD dEnd   = HIWORD(dwCurSel);
	
	// Search for, and select in, and string in the combo box that is prefixed
	// by the text in the edit box
	if (SelectString(-1, str) == CB_ERR)
	{
		SetWindowText(str);		// No text selected, so restore what was there before
		if (dwCurSel != CB_ERR)
			SetEditSel(dStart, dEnd);	//restore cursor postion
	}
	
	// Set the text selection as the additional text that we have added
	if (dEnd < nLength && dwCurSel != CB_ERR)
		SetEditSel(dStart, dEnd);
	else
		SetEditSel(nLength, -1);
}

void CCJFlatComboBox::OnSysColorChange() 
{
	CComboBox::OnSysColorChange();

	// re-initialize system colors.
	m_clrBtnHilite  = ::GetSysColor(COLOR_BTNHILIGHT);
	m_clrBtnShadow  = ::GetSysColor(COLOR_BTNSHADOW);
	m_clrBtnFace    = ::GetSysColor(COLOR_BTNFACE);
}