SpinButton.cpp

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/*
===========================================================================

Doom 3 GPL Source Code
Copyright (C) 1999-2011 id Software LLC, a ZeniMax Media company. 

This file is part of the Doom 3 GPL Source Code (?Doom 3 Source Code?).  

Doom 3 Source Code is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.

Doom 3 Source Code is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with Doom 3 Source Code.  If not, see <http://www.gnu.org/licenses/>.

In addition, the Doom 3 Source Code is also subject to certain additional terms. You should have received a copy of these additional terms immediately following the terms and conditions of the GNU General Public License which accompanied the Doom 3 Source Code.  If not, please request a copy in writing from id Software at the address below.

If you have questions concerning this license or the applicable additional terms, you may contact in writing id Software LLC, c/o ZeniMax Media Inc., Suite 120, Rockville, Maryland 20850 USA.

===========================================================================
*/

#include "../../idlib/precompiled.h"
#pragma hdrstop

#include "SpinButton.h"

void SpinButton_SetIncrement ( HWND hWnd, float inc )
{
        SetWindowLong ( hWnd, GWL_USERDATA, (long)(inc * 100.0f) );
}

void SpinButton_SetRange ( HWND hWnd, float minRange, float maxRange )
{
        SendMessage ( hWnd, UDM_SETRANGE32, (LONG)(minRange*100.0f), (LONG)(maxRange*100.0f) ); 
}

void SpinButton_HandleNotify ( NMHDR* hdr )
{
        // Return if incorrect data in edit box 
        NM_UPDOWN* udhdr= (NM_UPDOWN*)hdr;

        // Change with 0.1 on each click 
        char strValue[64];
        float value;                            
        GetWindowText ( (HWND)SendMessage ( hdr->hwndFrom, UDM_GETBUDDY, 0, 0 ), strValue, 63 );
        
        float inc = (float)GetWindowLong ( hdr->hwndFrom, GWL_USERDATA );
        if ( inc == 0 )
        {
                inc = 100.0f;
                SetWindowLong ( hdr->hwndFrom, GWL_USERDATA, 100 );
        }
        inc /= 100.0f;
        
        if ( GetAsyncKeyState ( VK_SHIFT ) & 0x8000 )
        {
                inc *= 10.0f;
        }
        
        value  = atof(strValue);                                
        value += (udhdr->iDelta)*(inc);

        // Avoid round-off errors 
        value = floor(value*1e3+0.5)/1e3;
        
        LONG minRange;
        LONG maxRange; 
        SendMessage ( hdr->hwndFrom, UDM_GETRANGE32, (LONG)&minRange, (LONG)&maxRange );
        if ( minRange !=  0 || maxRange != 0 )
        {
                float minRangef = (float)(long)minRange / 100.0f;
                float maxRangef = (float)maxRange / 100.0f;
                if ( value > maxRangef )
                {
                        value = maxRangef;
                }
                if ( value < minRangef )
                {
                        value = minRangef;
                }               
        }
        
        SetWindowText ( (HWND)SendMessage ( hdr->hwndFrom, UDM_GETBUDDY, 0, 0 ), va("%g",value) );
}