CardVBoxLayout.cpp

// Author: Annie Berend (5033782) - Jonathan Verbeek (5058288)
#include "CardVBoxLayout.h"
#include "Card.h"
#include <QDebug>

CCardVBoxLayout::CCardVBoxLayout(int spacing)
    : QLayout()
{
    // Set the initial spacing
    setSpacing(spacing);

    // Set up animation
    this->spacingAnim = new QVariantAnimation(this);
    this->spacingAnim->setDuration(100);

    // Called when the animation ticks so we can update
    QObject::connect(this->spacingAnim, &QVariantAnimation::valueChanged, [=](const QVariant& value) {
        // Just set the new spacing
        this->setSpacing(value.toInt());
    });
}

CCardVBoxLayout::CCardVBoxLayout(int spacing, QWidget *parent)
    : QLayout(parent)
{
    // Set the initial spacing
    setSpacing(spacing);

    // Set up animation
    this->spacingAnim = new QVariantAnimation(this);
    this->spacingAnim->setDuration(200);
    this->spacingAnim->setEasingCurve(QEasingCurve::InOutElastic);

    // Called when the animation ticks so we can update
    QObject::connect(this->spacingAnim, &QVariantAnimation::valueChanged, [=](const QVariant& value) {
        // Just set the new spacing
        this->setSpacing(value.toInt());
    });
}

int CCardVBoxLayout::count() const
{
    // QVector::size() returns the number of QLayoutItems in m_items
    return m_items.size();
}

QLayoutItem* CCardVBoxLayout::itemAt(int idx) const
{
    // QVector::value() performs index checking, and returns nullptr if we are
    // outside the valid range
    return m_items.value(idx);
}

QLayoutItem* CCardVBoxLayout::takeAt(int idx)
{
    // QVector::take does not do index checking
    return idx >= 0 && idx < m_items.size() ? m_items.takeAt(idx) : 0;
}

void CCardVBoxLayout::addItem(QLayoutItem *item)
{
    m_items.append(item);
}

CCardVBoxLayout::~CCardVBoxLayout()
{
    // Delete all items
    QLayoutItem* item;
    while ((item = takeAt(0)))
        delete item;
}

void CCardVBoxLayout::setGeometry(const QRect &r)
{
    // First layout the parent geometry
    QLayout::setGeometry(r);

    // Don't do anything if no elements
    if (m_items.size() == 0)
        return;

    // Calculate the width and height
    int i = 0;

    // Iterate all over items
    while (i < m_items.size())
    {
        // Calculate the geometry per item
        QLayoutItem* o = m_items.at(i);
        QRect geom(r.x(), r.y() + (i * spacing()), CCard::getCardScreenSize().width(), CCard::getCardScreenSize().height());
        o->setGeometry(geom);
        ++i;
    }
}

void CCardVBoxLayout::setSpacingWithAnimation(int newSpacing)
{
    // Don't when the new spacing is the same as the current spacing
    if (this->spacing() == newSpacing) return;

    // Set the animation start and end
    this->spacingAnim->setStartValue(this->spacing());
    this->spacingAnim->setEndValue(newSpacing);
    this->spacingAnim->start();
}

QSize CCardVBoxLayout::sizeHint() const
{
    QSize s(0, 0);
    int n = m_items.count();

    // If we have more than 0 items
    if (n > 0)
        s = CCard::getCardScreenSize(); // Default size

    // Iterate over items and expand all item's sizes
    int i = 0;
    while (i < n) {
        QLayoutItem *o = m_items.at(i);
        s = s.expandedTo(o->sizeHint());
        ++i;
    }

    // Calculate final size
    return s + n * QSize(0, spacing());
}

QSize CCardVBoxLayout::minimumSize() const
{
    // Iterate over all items and calculate their minimum size
    QSize s(0, 0);
    int n = m_items.count();
    int i = 0;
    while (i < n) {
        QLayoutItem *o = m_items.at(i);
        s = s.expandedTo(o->minimumSize());
        ++i;
    }
    return s + n * QSize(0, spacing());
}