AtomicGameEngine/Source/ThirdParty/TurboBadger/tb_toggle_container.cpp

// ================================================================================
// ==      This file is a part of Turbo Badger. (C) 2011-2014, Emil Segerås      ==
// ==                     See tb_core.h for more information.                    ==
// ================================================================================

#include "tb_toggle_container.h"
#include "tb_widgets_reader.h"
#include "tb_node_tree.h"

namespace tb {

// == TBSectionHeader =====================================

TBSectionHeader::TBSectionHeader()
{
    SetSkinBg(TBIDC("TBSectionHeader"));
    SetGravity(WIDGET_GRAVITY_LEFT | WIDGET_GRAVITY_RIGHT);
    SetToggleMode(true);
}

bool TBSectionHeader::OnEvent(const TBWidgetEvent &ev)
{
    if (ev.target == this && ev.type == EVENT_TYPE_CHANGED && GetParent()->GetParent())
    {
        if (TBSection *section = TBSafeCast<TBSection>(GetParent()->GetParent()))
        {
            section->GetContainer()->SetValue(GetValue());

            // Try to scroll the container into view when expanded
            section->SetPendingScrollIntoView(GetValue() ? true : false);
        }
    }
    return TBButton::OnEvent(ev);
}

// == TBSectionHeader =====================================

TBSection::TBSection()
    : m_pending_scroll(false)
{
    SetGravity(WIDGET_GRAVITY_LEFT | WIDGET_GRAVITY_RIGHT);

    SetSkinBg(TBIDC("TBSection"), WIDGET_INVOKE_INFO_NO_CALLBACKS);
    m_layout.SetSkinBg(TBIDC("TBSection.layout"), WIDGET_INVOKE_INFO_NO_CALLBACKS);

    m_toggle_container.SetSkinBg(TBIDC("TBSection.container"));
    m_toggle_container.SetToggle(TBToggleContainer::TOGGLE_EXPANDED);
    m_toggle_container.SetGravity(WIDGET_GRAVITY_ALL);
    m_layout.SetAxis(AXIS_Y);
    m_layout.SetGravity(WIDGET_GRAVITY_ALL);
    m_layout.SetLayoutSize(LAYOUT_SIZE_AVAILABLE);

    AddChild(&m_layout);
    m_layout.AddChild(&m_header);
    m_layout.AddChild(&m_toggle_container);
}

TBSection::~TBSection()
{
    m_layout.RemoveChild(&m_toggle_container);
    m_layout.RemoveChild(&m_header);
    RemoveChild(&m_layout);
}

void TBSection::SetValue(int value)
{
    m_header.SetValue(value);
    m_toggle_container.SetValue(value);
}

void TBSection::OnProcessAfterChildren()
{
    if (m_pending_scroll)
    {
        m_pending_scroll = false;
        ScrollIntoViewRecursive();
    }
}

PreferredSize TBSection::OnCalculatePreferredSize(const SizeConstraints &constraints)
{
    PreferredSize ps = TBWidget::OnCalculatePreferredContentSize(constraints);
    // We should not grow larger than we are, when there's extra space available.
    ps.max_h = ps.pref_h;
    return ps;
}

// == TBToggleContainer ===================================

TBToggleContainer::TBToggleContainer()
    : m_toggle(TOGGLE_NOTHING)
    , m_invert(false)
    , m_value(0)
{
    SetSkinBg(TBIDC("TBToggleContainer"), WIDGET_INVOKE_INFO_NO_CALLBACKS);
}

void TBToggleContainer::SetToggle(TOGGLE toggle)
{
    if (toggle == m_toggle)
        return;

    if (m_toggle == TOGGLE_EXPANDED)
        InvalidateLayout(INVALIDATE_LAYOUT_RECURSIVE);

    m_toggle = toggle;
    UpdateInternal();
}

void TBToggleContainer::SetInvert(bool invert)
{
    if (invert == m_invert)
        return;
    m_invert = invert;
    UpdateInternal();
}

void TBToggleContainer::SetValue(int value)
{
    if (value == m_value)
        return;
    m_value = value;
    UpdateInternal();
    InvalidateSkinStates();
}

void TBToggleContainer::UpdateInternal()
{
    bool on = GetIsOn();
    switch (m_toggle)
    {
    case TOGGLE_NOTHING:
        break;
    case TOGGLE_ENABLED:
        SetState(WIDGET_STATE_DISABLED, !on);
        break;
    case TOGGLE_OPACITY:
        SetOpacity(on ? 1.f : 0);
        break;
    case TOGGLE_EXPANDED:
        SetVisibilility(on ? WIDGET_VISIBILITY_VISIBLE : WIDGET_VISIBILITY_GONE);

        // Also disable when collapsed so tab focus skips the children.
        SetState(WIDGET_STATE_DISABLED, !on);
        break;
    };
}

}; // namespace tb