nuclide/Source/vgui/ui_list.cpp

/*
 * Copyright (c) 2016-2019 Marco Hladik <marco@icculus.org>
 *
 * Permission to use, copy, modify, and distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER
 * IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
 * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

class CUIList : CUIWidget
{
	vector m_vecSize;
	string m_strTitle;
	string *m_strItems;
	int m_iItemCount;
	int m_iSelected;
	int m_iDrawOffset;
	
	void() CUIList;
	
	virtual void() m_vScrollCB = 0;
	
	virtual void( vector ) SetSize;
	virtual void( int, int ) SetOffset;
	
	virtual void( int ) SetSelected;
	virtual int() GetSelected;
	
	virtual int() GetMaxVisibleItems;
	
	virtual void( string ) AddItem;
	virtual string( int ) GetItem;
	
	virtual void( int ) SetItemCount;
	virtual int() GetItemCount;
	
	virtual void( void() ) CallOnScroll;
	
	virtual void() Draw;
	virtual void( float, float, float, float ) Input;
};

void CUIList :: CUIList ( void )
{
	m_vecSize = '96 16';
	m_iFlags = 1;
	m_iSelected = -1;
}

void CUIList :: Draw ( void )
{
	int iMaxDisplay;
	if ( !m_iItemCount ) {
		return;
	}
	
#ifdef CLASSIC_VGUI
	drawfill( m_parent.m_vecOrigin + m_vecOrigin + [ 0, m_vecSize[1] - 1], [m_vecSize[0], 1], UI_MAINCOLOR, 1.0f );
	drawfill( m_parent.m_vecOrigin + m_vecOrigin, [m_vecSize[0], 1], UI_MAINCOLOR, 1.0f );
	drawfill( m_parent.m_vecOrigin + m_vecOrigin + [ 0, 1], [1, m_vecSize[1] - 2], UI_MAINCOLOR, 1.0f );
	drawfill( m_parent.m_vecOrigin + m_vecOrigin + [ m_vecSize[0] - 1, 1], [1, m_vecSize[1] - 2], UI_MAINCOLOR, 1.0f );
#else
	drawfill( m_parent.m_vecOrigin + m_vecOrigin, m_vecSize, '0 0 0', 0.25f );
	drawfill( m_parent.m_vecOrigin + m_vecOrigin, [m_vecSize[0], 1], '0 0 0', 0.5f );
	drawfill( m_parent.m_vecOrigin + m_vecOrigin + [ 0, m_vecSize[1] - 1], [m_vecSize[0], 1], '1 1 1', 0.5f );
	drawfill( m_parent.m_vecOrigin + m_vecOrigin + [ 0, 1], [1, m_vecSize[1] - 2], '0 0 0', 0.5f );
	drawfill( m_parent.m_vecOrigin + m_vecOrigin + [ m_vecSize[0] - 1, 1], [1, m_vecSize[1] - 2], '1 1 1', 0.5f );
#endif

	vector vecOffset = '8 8';
	
	iMaxDisplay = bound( 0, m_iItemCount, floor( m_vecSize[1] / 20 ) );

	drawsetcliparea( m_parent.m_vecOrigin[0] + m_vecOrigin[0],m_parent.m_vecOrigin[1] + m_vecOrigin[1], m_vecSize[0] - 1, m_vecSize[1] );
	for ( int i = m_iDrawOffset; i < iMaxDisplay + m_iDrawOffset; i++ ) {
		if ( !m_strItems[i] ) {
			break;
		}
		
		if ( m_iSelected == i ) {
			drawfill( m_parent.m_vecOrigin + m_vecOrigin + vecOffset + '-7 -3', [ m_vecSize[0] - 2, 18 ], '1 1 1', 0.5f );
		} else if ( i & 1 ) {
			drawfill( m_parent.m_vecOrigin + m_vecOrigin + vecOffset + '-7 -3', [ m_vecSize[0] - 2, 18 ], '1 1 1', 0.1f );
		}
		
		Font_DrawText( m_parent.m_vecOrigin + m_vecOrigin + vecOffset, m_strItems[i], g_fntDefault );
		vecOffset[1] += 20;
	}
	drawresetcliparea();
}

void CUIList :: Input ( float flEVType, float flKey, float flChar, float flDevID )
{
	int iMaxDisplay;
	int iMouseOver = Util_MouseAbove( getmousepos(), m_parent.m_vecOrigin + m_vecOrigin, m_vecSize );
	iMaxDisplay = bound( 0, m_iItemCount, floor( m_vecSize[1] / 20 ) );
	
	vector vecOffset = '8 8';
	if ( flEVType == IE_KEYDOWN ) {
		if ( flKey == K_MOUSE1 ) {
			for ( int i = m_iDrawOffset; i < iMaxDisplay + m_iDrawOffset; i++ ) {
				if ( Util_MouseAbove( getmousepos(), m_parent.m_vecOrigin + m_vecOrigin + vecOffset, [ m_vecSize[0] - 16, 20 ] ) ) {
					m_iSelected = i;
					return;
				}
				vecOffset[1] += 20;
			}
		} else if ( flKey == K_MWHEELUP && iMouseOver ) {
			SetOffset( m_iDrawOffset - ( iMaxDisplay / 4 ), TRUE );
		} else if ( flKey == K_MWHEELDOWN && iMouseOver ) {
			SetOffset( m_iDrawOffset + ( iMaxDisplay / 4 ), TRUE );
		}
	}
}

void CUIList :: SetSize ( vector vecSize )
{
	m_vecSize = vecSize;
}
vector CUIList :: GetSize ( void )
{
	return m_vecSize;
}

int CUIList :: GetMaxVisibleItems ( void )
{
	int iMaxDisplay = bound( 0, m_iItemCount, floor( m_vecSize[1] / 20 ) );
	return m_iItemCount - iMaxDisplay;
}

void CUIList :: SetOffset ( int iOffset, int iCallBack )
{
	int iMaxDisplay = bound( 0, m_iItemCount, floor( m_vecSize[1] / 20 ) );
	m_iDrawOffset = bound( 0, iOffset, m_iItemCount - iMaxDisplay );
	
	if ( m_vScrollCB && iCallBack ) {
		m_vScrollCB();
	}
}
int CUIList :: GetOffset ( void )
{
	return m_iDrawOffset;
}

void CUIList :: SetItemCount ( int iCount )
{
	if ( !m_iItemCount ) {
		dprint( sprintf( "CUIList: Initialized with a maximum of %i entries\n", iCount ) );
		m_iItemCount = iCount;
		m_strItems = memalloc( iCount * sizeof( string ) );
	}
}
int CUIList :: GetItemCount ( void )
{
	return m_iItemCount;
}

string CUIList :: GetItem ( int iIndex )
{
	if ( m_iSelected < 0 || m_iItemCount <= 0 ) {
		dprint( "CUIList: GetItem on empty/unselected list!\n" );
		return "ERROR";
	}
	return m_strItems[ iIndex ];
}

void CUIList :: SetSelected ( int iVal )
{
	m_iSelected = iVal;
}
int CUIList :: GetSelected ( void )
{
	return m_iSelected;
}

void CUIList :: AddItem ( string strItem )
{
	if ( !m_iItemCount ) {
		dprint( "CUIList: Can't add item to empty list!\n" );
		return;
	}
	
	for ( int i = 0; i < m_iItemCount; i++ ) {
		if ( !m_strItems[i] ) {
			m_strItems[i] = strItem;
			dprint( "CUIList: Item added\n" );
			break;
		}
	}
}

void CUIList :: CallOnScroll ( void() vFunc )
{
	m_vScrollCB = vFunc;
}