ciderpress/util/MySpinCtrl.cpp

/*
 * CiderPress
 * Copyright (C) 2007 by faddenSoft, LLC.  All Rights Reserved.
 * See the file LICENSE for distribution terms.
 */
/*
 * Replacement spin control.  This one has a 32-bit range and doesn't
 * have the weird wrap-under behavior in hex mode.
 */
#include "stdafx.h"
#include "MySpinCtrl.h"


/*
 * Grab the notification that tells us an update has been made.
 */
BEGIN_MESSAGE_MAP(MySpinCtrl, CSpinButtonCtrl)
	ON_NOTIFY_REFLECT(UDN_DELTAPOS, OnDeltaPos)
END_MESSAGE_MAP()


#if 0
// This is called by MFC after the window's HWND has been bound to the 
// MySpinCtrl object, but before the subclassing occurs.  Note that this class 
// never gets WM_CREATE, because that comes before the subclassing occurs.
void MySpinCtrl::PreSubclassWindow()
{
	_ASSERTE(! (UDS_SETBUDDYINT & GetStyle())  &&  "'Auto Buddy Int' style *MUST NOT* be checked");
	_ASSERTE(  (UDS_AUTOBUDDY   & GetStyle())  &&  "'Auto Buddy' style *MUST* be checked");

	// Do this so that, the first time, the up/down arrows work in the right
	// direction, and the range is a reasonable value.
	CSpinButtonCtrl::SetRange(fLow, fHigh);
	SetRange(fLow, fHigh);
	
	CSpinButtonCtrl::PreSubclassWindow();
}
#endif

/*
 * Convert a decimal or hex string to a long.
 *
 * Returns "true" on success, "false" on error.
 */
bool
MySpinCtrl::ConvLong(const char* str, long* pVal) const
{
	char* endp;

	*pVal = strtol(str, &endp, GetBase());
	if (endp == str || *endp != '\0')
		return false;

	return true;
}

/*
 * Handle UDN_DELTAPOS notification.
 */
void
MySpinCtrl::OnDeltaPos(NMHDR* pNMHDR, LRESULT* pResult)
{
	_ASSERTE(! (UDS_SETBUDDYINT & GetStyle())  &&  "'Auto Buddy Int' style *MUST* be unchecked");
//	_ASSERTE(  (UDS_AUTOBUDDY   & GetStyle())  &&  "'Auto Buddy' style *MUST* be checked");
	_ASSERTE(  (UDS_NOTHOUSANDS & GetStyle())  &&  "'No Thousands' style *MUST* be checked");

	NM_UPDOWN* pNMUpDown = (NM_UPDOWN*)pNMHDR;

	/* grab value from buddy ctrl */
	ASSERT(GetBuddy() != nil);
	CString buddyStr;
	GetBuddy()->GetWindowText(buddyStr);

	long buddyVal, proposedVal;

	if (!ConvLong(buddyStr, &buddyVal))
		goto bail;		// bad string
	proposedVal = buddyVal - pNMUpDown->iDelta;

	/* peg at the end */
	if (proposedVal < fLow)
		proposedVal = fLow;
	if (proposedVal > fHigh)
		proposedVal = fHigh;

	if (proposedVal != buddyVal) {
		/* set buddy control to new value */
		if (GetBase() == 10)
			buddyStr.Format("%d", proposedVal);
		else
			buddyStr.Format("%X", proposedVal);
		GetBuddy()->SetWindowText(buddyStr);
	}
	
bail:
	*pResult = 0;
}

/*
 * Set the current position.
 *
 * Returns the previous position.
 */
int
MySpinCtrl::SetPos(int nPos)
{
	_ASSERTE(! (UDS_SETBUDDYINT & GetStyle())  &&  "'Auto Buddy Int' style *MUST* be unchecked");
//	_ASSERTE(  (UDS_AUTOBUDDY   & GetStyle())  &&  "'Auto Buddy' style *MUST* be checked");

	CString buddyStr;

	if (nPos < fLow || nPos > fHigh) {
		//WMSG0(" MSP setpos out of range\n");
		return -1;
	}

	if (GetBase() == 10)
		buddyStr.Format("%d", nPos);
	else
		buddyStr.Format("%X", nPos);

	GetBuddy()->SetWindowText(buddyStr);

	return -1;		// broken
}

/*
 * Get the current position.
 *
 * Returns -1 on error.  Yes, that's bogus, but it's good enough for now.
 */
int
MySpinCtrl::GetPos() const
{
	_ASSERTE(! (UDS_SETBUDDYINT & GetStyle())  &&  "'Auto Buddy Int' style *MUST* be unchecked");
//	_ASSERTE(  (UDS_AUTOBUDDY   & GetStyle())  &&  "'Auto Buddy' style *MUST* be checked");

	// Grab buddy edit control value.
	CString buddyStr;
	GetBuddy()->GetWindowText(buddyStr);

	long val;
	if (!ConvLong(buddyStr, &val))
		return -1;

	if (val < fLow || val > fHigh)
		return -1;

	// if they typed a "sloppy value" in, make it look nice
	CString reformatStr;
	if (GetBase() == 10)
		reformatStr.Format("%d", val);
	else
		reformatStr.Format("%X", val);
	if (buddyStr != reformatStr)
		GetBuddy()->SetWindowText(reformatStr);

	return val;
}

DWORD
MySpinCtrl::GetRange(void) const
{
	_ASSERTE(! "Do NOT use this method!");
	return 0;
}

/*
 * Get 32-bit ranges.
 */
void
MySpinCtrl::GetRange32(int& lower, int& upper) const
{
	lower = fLow;
	upper = fHigh;
	//WMSG2(" MSP getting lower=%d upper=%d\n", lower, upper);
}

/*
 * Set 32-bit ranges.
 */
void
MySpinCtrl::SetRange32(int nLo, int nHi)
{
	_ASSERTE(! (UDS_SETBUDDYINT & GetStyle())  &&  "'Auto Buddy Int' style *MUST* be unchecked");
//	_ASSERTE(  (UDS_AUTOBUDDY   & GetStyle())  &&  "'Auto Buddy' style *MUST* be checked");

	fLow = nLo;
	fHigh = nHi;
	//WMSG2(" MSP setting lower=%d upper=%d\n", fLow, fHigh);
}