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/* Copyright (C) 2017 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.h"
#include "lib/ogl.h"
#include "ps/CLogger.h"
CSlider::CSlider()
: m_IsPressed(false), m_ButtonSide(0)
{
AddSetting(GUIST_float, "value");
AddSetting(GUIST_float, "min_value");
AddSetting(GUIST_float, "max_value");
AddSetting(GUIST_int, "cell_id");
AddSetting(GUIST_CGUISpriteInstance, "sprite");
AddSetting(GUIST_CGUISpriteInstance, "sprite_bar");
AddSetting(GUIST_float, "button_width");
GUI<float>::GetSetting(this, "value", m_Value);
GUI<float>::GetSetting(this, "min_value", m_MinValue);
GUI<float>::GetSetting(this, "max_value", m_MaxValue);
GUI<float>::GetSetting(this, "button_width", m_ButtonSide);
m_Value = Clamp(m_Value, m_MinValue, m_MaxValue);
}
CSlider::~CSlider()
{
}
void CSlider::HandleMessage(SGUIMessage& Message)
{
switch (Message.type)
{
case GUIM_SETTINGS_UPDATED:
{
GUI<float>::GetSetting(this, "value", m_Value);
GUI<float>::GetSetting(this, "min_value", m_MinValue);
GUI<float>::GetSetting(this, "max_value", m_MaxValue);
GUI<float>::GetSetting(this, "button_width", m_ButtonSide);
m_Value = Clamp(m_Value, m_MinValue, m_MaxValue);
break;
}
case GUIM_MOUSE_WHEEL_DOWN:
{
if (m_IsPressed)
break;
m_Value = std::max(m_Value - 0.01f, m_MinValue);
UpdateValue();
break;
}
case GUIM_MOUSE_WHEEL_UP:
{
if (m_IsPressed)
break;
m_Value = std::min(m_Value + 0.01f, m_MaxValue);
UpdateValue();
break;
}
case GUIM_MOUSE_PRESS_LEFT:
{
if (GetButtonRect().PointInside(GetMousePos()))
{
m_Mouse = GetMousePos();
m_IsPressed = true;
}
break;
}
case GUIM_MOUSE_RELEASE_LEFT:
{
m_IsPressed = false;
break;
}
case GUIM_MOUSE_MOTION:
{
if (!MouseOver())
m_IsPressed = false;
if (m_IsPressed)
{
float ratio = (m_MaxValue - m_MinValue) / (m_CachedActualSize.GetWidth() - m_ButtonSide);
float difference = float(GetMousePos().x - m_Mouse.x) * ratio;
m_Mouse = GetMousePos();
m_Value = Clamp(m_Value + difference, m_MinValue, m_MaxValue);
UpdateValue();
}
break;
}
default:
break;
}
}
void CSlider::Draw()
{
if (!GetGUI())
return;
CGUISpriteInstance* sprite;
CGUISpriteInstance* sprite_button;
int cell_id;
GUI<CGUISpriteInstance>::GetSettingPointer(this, "sprite_bar", sprite);
GUI<CGUISpriteInstance>::GetSettingPointer(this, "sprite", sprite_button);
GUI<int>::GetSetting(this, "cell_id", cell_id);
CRect slider_line(m_CachedActualSize);
slider_line.left += m_ButtonSide / 2.0f;
slider_line.right -= m_ButtonSide / 2.0f;
float bz = GetBufferedZ();
GetGUI()->DrawSprite(*sprite, cell_id, bz, slider_line);
GetGUI()->DrawSprite(*sprite_button, cell_id, bz, GetButtonRect());
}
void CSlider::UpdateValue()
{
GUI<float>::SetSetting(this, "value", m_Value);
ScriptEvent("valuechange");
}
CRect CSlider::GetButtonRect()
{
float ratio = m_MaxValue > m_MinValue ? (m_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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