// * This file is part of the COLOBOT source code
// * Copyright (C) 2001-2008, Daniel ROUX & EPSITEC SA, www.epsitec.ch
// *
// * This program 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.
// *
// * This program 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 this program. If not, see  http://www.gnu.org/licenses/.

// editvalue.cpp

#define STRICT
#define D3D_OVERLOADS

#include <windows.h>
#include <stdio.h>
#include <d3d.h>

#include "common/struct.h"
#include "graphics/d3d/d3dengine.h"
#include "math/old/math3d.h"
#include "common/event.h"
#include "common/misc.h"
#include "common/iman.h"
#include "ui/edit.h"
#include "ui/button.h"
#include "ui/editvalue.h"




// Object's constructor.

CEditValue::CEditValue(CInstanceManager* iMan) : CControl(iMan)
{
	m_edit       = 0;
	m_buttonUp   = 0;
	m_buttonDown = 0;

	m_type = EVT_100;  // %
	m_stepValue = 0.1f;  // 10%
	m_minValue = 0.0f;  // 0%
	m_maxValue = 1.0f;  // 100%
}

// Object's destructor.

CEditValue::~CEditValue()
{
	delete m_edit;
	delete m_buttonUp;
	delete m_buttonDown;
}


// Creates a new button.

bool CEditValue::Create(FPOINT pos, FPOINT dim, int icon, EventMsg eventMsg)
{
	CEdit*		pe;
	CButton*	pc;

	if ( eventMsg == EVENT_NULL )  eventMsg = GetUniqueEventMsg();
	CControl::Create(pos, dim, icon, eventMsg);

	GlintDelete();

	m_edit = new CEdit(m_iMan);
	pe = (CEdit*)m_edit;
	pe->Create(pos, dim, 0, EVENT_NULL);
	pe->SetMaxChar(4);

	m_buttonUp = new CButton(m_iMan);
	pc = (CButton*)m_buttonUp;
	pc->Create(pos, dim, 49, EVENT_NULL);  // ^
	pc->SetRepeat(true);

	m_buttonDown = new CButton(m_iMan);
	pc = (CButton*)m_buttonDown;
	pc->Create(pos, dim, 50, EVENT_NULL);  // v
	pc->SetRepeat(true);

	MoveAdjust();
	return true;
}


void CEditValue::SetPos(FPOINT pos)
{
	CControl::SetPos(pos);
	MoveAdjust();
}

void CEditValue::SetDim(FPOINT dim)
{
	CControl::SetDim(dim);
	MoveAdjust();
}

void CEditValue::MoveAdjust()
{
	FPOINT		pos, dim;

	if ( m_edit != 0 )
	{
		pos.x = m_pos.x;
		pos.y = m_pos.y;
		dim.x = m_dim.x-m_dim.y*0.6f;
		dim.y = m_dim.y;
		m_edit->SetPos(pos);
		m_edit->SetDim(dim);
	}

	if ( m_buttonUp != 0 )
	{
		pos.x = m_pos.x+m_dim.x-m_dim.y*0.6f;
		pos.y = m_pos.y+m_dim.y*0.5f;
		dim.x = m_dim.y*0.6f;
		dim.y = m_dim.y*0.5f;
		m_buttonUp->SetPos(pos);
		m_buttonUp->SetDim(dim);
	}

	if ( m_buttonDown != 0 )
	{
		pos.x = m_pos.x+m_dim.x-m_dim.y*0.6f;
		pos.y = m_pos.y;
		dim.x = m_dim.y*0.6f;
		dim.y = m_dim.y*0.5f;
		m_buttonDown->SetPos(pos);
		m_buttonDown->SetDim(dim);
	}
}


// Management of an event.

bool CEditValue::EventProcess(const Event &event)
{
	float	value;

	CControl::EventProcess(event);

	if ( (m_state & STATE_VISIBLE) == 0 )  return true;
	if ( (m_state & STATE_ENABLE) == 0 )  return true;

	if ( m_edit != 0 )
	{
		if ( m_edit->RetFocus()           &&
			 event.event == EVENT_KEYDOWN &&
			 event.param == VK_RETURN     )
		{
			value = RetValue();
			if ( value > m_maxValue )  value = m_maxValue;
			if ( value < m_minValue )  value = m_minValue;
			SetValue(value, true);
			HiliteValue(event);
		}
		if ( !m_edit->EventProcess(event) )  return false;

		if ( event.event == m_edit->RetEventMsg() )
		{
			Event		newEvent;
			m_event->MakeEvent(newEvent, m_eventMsg);
			m_event->AddEvent(newEvent);
		}
	}

	if ( m_buttonUp != 0 )
	{
		if ( event.event == m_buttonUp->RetEventMsg() )
		{
			value = RetValue()+m_stepValue;
			if ( value > m_maxValue )  value = m_maxValue;
			SetValue(value, true);
			HiliteValue(event);
		}
		if ( !m_buttonUp->EventProcess(event) )  return false;
	}

	if ( m_buttonDown != 0 )
	{
		if ( event.event == m_buttonDown->RetEventMsg() )
		{
			value = RetValue()-m_stepValue;
			if ( value < m_minValue )  value = m_minValue;
			SetValue(value, true);
			HiliteValue(event);
		}
		if ( !m_buttonDown->EventProcess(event) )  return false;
	}

	if ( event.event == EVENT_KEYDOWN &&
		 event.param == VK_WHEELUP    &&
		 Detect(event.pos)            )
	{
		value = RetValue()+m_stepValue;
		if ( value > m_maxValue )  value = m_maxValue;
		SetValue(value, true);
		HiliteValue(event);
	}
	if ( event.event == EVENT_KEYDOWN &&
		 event.param == VK_WHEELDOWN  &&
		 Detect(event.pos)            )
	{
		value = RetValue()-m_stepValue;
		if ( value < m_minValue )  value = m_minValue;
		SetValue(value, true);
		HiliteValue(event);
	}

	return true;
}


// Puts in evidence the edited value.

void CEditValue::HiliteValue(const Event &event)
{
	int		pos;

	if ( m_edit == 0 )  return;

	pos = m_edit->RetTextLength();
	if ( m_type == EVT_100 && pos > 0 )
	{
		pos --;  // not only selects the "%"
	}

	m_edit->SetCursor(pos, 0);
	m_edit->SetFocus(true);

	Event newEvent = event;
	newEvent.event = EVENT_FOCUS;
	newEvent.param = m_edit->RetEventMsg();
	m_event->AddEvent(newEvent);  // defocus the other objects
}


// Draw button.

void CEditValue::Draw()
{
	if ( (m_state & STATE_VISIBLE) == 0 )  return;

	if ( m_state & STATE_SHADOW )
	{
		DrawShadow(m_pos, m_dim);
	}

	if ( m_edit != 0 )
	{
		m_edit->Draw();
	}
	if ( m_buttonUp != 0 )
	{
		m_buttonUp->Draw();
	}
	if ( m_buttonDown != 0 )
	{
		m_buttonDown->Draw();
	}
}


// Choosing the type of value.

void CEditValue::SetType(EditValueType type)
{
	m_type = type;
}

EditValueType CEditValue::RetType()
{
	return m_type;
}


// Changes the value.

void CEditValue::SetValue(float value, bool bSendMessage)
{
	char	text[100];

	if ( m_edit == 0 )  return;

	text[0] = 0;

	if ( m_type == EVT_INT )
	{
		sprintf(text, "%d", (int)value);
	}

	if ( m_type == EVT_FLOAT )
	{
		sprintf(text, "%.2f", value);
	}

	if ( m_type == EVT_100 )
	{
		sprintf(text, "%d%%", (int)(value*100.0f));
	}

	m_edit->SetText(text);

	if ( bSendMessage )
	{
		Event		newEvent;
		m_event->MakeEvent(newEvent, m_eventMsg);
		m_event->AddEvent(newEvent);
	}
}

// Return the edited value.

float CEditValue::RetValue()
{
	char	text[100];
	float	value;

	if ( m_edit == 0 )  0.0f;

	m_edit->GetText(text, 100);
	sscanf(text, "%f", &value);

	if ( m_type == EVT_100 )
	{
		value = (value+0.5f)/100.0f;
		if ( value < 0.01f )  value = 0.0f;  // less than 1%?
	}

	return value;
}


// Management not for buttons.

void CEditValue::SetStepValue(float value)
{
	m_stepValue = value;
}

float CEditValue::RetStepValue()
{
	return m_stepValue;
}


// Management of the minimum value.

void CEditValue::SetMinValue(float value)
{
	m_minValue = value;
}

float CEditValue::RetMinValue()
{
	return m_minValue;
}


// Management of the maximum value.

void CEditValue::SetMaxValue(float value)
{
	m_maxValue = value;
}

float CEditValue::RetMaxValue()
{
	return m_maxValue;
}