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/* Copyright (C) 2022 Wildfire Games.
* This file is part of 0 A.D.
*
* 0 A.D. 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 2 of the License, or
* (at your option) any later version.
*
* 0 A.D. 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 0 A.D. If not, see <http://www.gnu.org/licenses/>.
*/
#include "precompiled.h"
#include "CSlider.h"
#include "gui/CGUI.h"
#include "maths/MathUtil.h"
const CStr CSlider::EventNameValueChange = "ValueChange";
CSlider::CSlider(CGUI& pGUI)
: IGUIObject(pGUI),
IGUIButtonBehavior(*static_cast<IGUIObject*>(this)),
m_ButtonSide(this, "button_width"),
m_MaxValue(this, "max_value"),
m_MinValue(this, "min_value"),
m_Sprite(this, "sprite"),
m_SpriteDisabled(this, "sprite_disabled"),
m_SpriteBar(this, "sprite_bar"),
m_SpriteBarDisabled(this, "sprite_bar_disabled"),
m_Value(this, "value")
{
m_Value.Set(Clamp<float>(m_Value, m_MinValue, m_MaxValue), false);
}
CSlider::~CSlider()
{
}
void CSlider::ResetStates()
{
IGUIObject::ResetStates();
IGUIButtonBehavior::ResetStates();
}
float CSlider::GetSliderRatio() const
{
return (m_MaxValue - m_MinValue) / (m_CachedActualSize.GetWidth() - m_ButtonSide);
}
void CSlider::IncrementallyChangeValue(const float difference)
{
m_Value.Set(Clamp<float>(m_Value + difference, m_MinValue, m_MaxValue), true);
UpdateValue();
}
void CSlider::HandleMessage(SGUIMessage& Message)
{
IGUIObject::HandleMessage(Message);
IGUIButtonBehavior::HandleMessage(Message);
switch (Message.type)
{
/*
case GUIM_SETTINGS_UPDATED:
{
m_Value.Set(Clamp<float>(m_Value, m_MinValue, m_MaxValue), true);
break;
}
*/
case GUIM_MOUSE_WHEEL_DOWN:
{
if (m_Pressed)
break;
IncrementallyChangeValue(-0.01f);
break;
}
case GUIM_MOUSE_WHEEL_UP:
{
if (m_Pressed)
break;
IncrementallyChangeValue(0.01f);
break;
}
case GUIM_MOUSE_PRESS_LEFT:
FALLTHROUGH;
case GUIM_MOUSE_MOTION:
{
if (m_Pressed)
{
m_Mouse = m_pGUI.GetMousePos();
IncrementallyChangeValue((m_Mouse.X - GetButtonRect().CenterPoint().X) * GetSliderRatio());
}
break;
}
default:
break;
}
}
void CSlider::Draw(CCanvas2D& canvas)
{
CRect sliderLine(m_CachedActualSize);
sliderLine.left += m_ButtonSide / 2.0f;
sliderLine.right -= m_ButtonSide / 2.0f;
m_pGUI.DrawSprite(IsEnabled() ? m_SpriteBar : m_SpriteBarDisabled, canvas, sliderLine);
m_pGUI.DrawSprite(IsEnabled() ? m_Sprite : m_SpriteDisabled, canvas, GetButtonRect());
}
void CSlider::UpdateValue()
{
ScriptEvent(EventNameValueChange);
}
CRect CSlider::GetButtonRect() const
{
// Even if the value is incorrect it doesn't make sense to draw it outside
// of the element bounds. Because that value might be set intentionally in the
// config for debug purposes.
const float value = Clamp<float>(m_Value, m_MinValue, m_MaxValue);
float ratio = m_MaxValue > m_MinValue ? (value - m_MinValue) / (m_MaxValue - m_MinValue) : 0.0f;
float x = m_CachedActualSize.left + ratio * (m_CachedActualSize.GetWidth() - m_ButtonSide);
float y = m_CachedActualSize.top + (m_CachedActualSize.GetHeight() - m_ButtonSide) / 2.0;
return CRect(x, y, x + m_ButtonSide, y + m_ButtonSide);
}
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