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/*
SPDX-FileCopyrightText: 2025 Felix Ernst <[email protected]>
SPDX-License-Identifier: LGPL-2.1-only OR LGPL-3.0-only OR LicenseRef-KDE-Accepted-LGPL
*/
#include "barsecondrowflowlayout.h"
#include <QWidget>
#include <vector>
using namespace Search;
namespace
{
constexpr int searchLocationButtonsCount = 2;
}
BarSecondRowFlowLayout::BarSecondRowFlowLayout(QWidget *parent)
: QLayout{parent}
{
setContentsMargins(0, 0, 0, 0);
}
BarSecondRowFlowLayout::~BarSecondRowFlowLayout()
{
QLayoutItem *item;
while ((item = takeAt(0)))
delete item;
}
void BarSecondRowFlowLayout::addItem(QLayoutItem *item)
{
itemList.append(item);
}
Qt::Orientations BarSecondRowFlowLayout::expandingDirections() const
{
return {};
}
bool BarSecondRowFlowLayout::hasHeightForWidth() const
{
return false;
}
int BarSecondRowFlowLayout::count() const
{
return itemList.size();
}
QLayoutItem *BarSecondRowFlowLayout::itemAt(int index) const
{
return itemList.value(index);
}
QSize BarSecondRowFlowLayout::sizeHint() const
{
const QRect rect = geometry();
QSize size;
for (const QLayoutItem *item : std::as_const(itemList)) {
size = size.expandedTo(QSize{item->geometry().right() - rect.x(), item->geometry().bottom() - rect.y()});
}
return size;
}
void BarSecondRowFlowLayout::setGeometry(const QRect &rect)
{
const int oldHeightHint = sizeHint().height();
QLayout::setGeometry(rect);
const bool isLeftToRight = itemAt(0)->widget()->layoutDirection() == Qt::LeftToRight;
int x = rect.left();
int y = rect.top();
/// The search location buttons are treated differently. They are meant to be in the same row and aligned the other way.
int totalLocationButtonWidth = 0;
for (int i = 0; i < searchLocationButtonsCount; i++) {
totalLocationButtonWidth += itemAt(i)->widget()->sizeHint().width();
}
if (totalLocationButtonWidth > rect.width()) {
/// There is not enough space so we will smush all the location buttons into the first row.
for (int i = 0; i < searchLocationButtonsCount; i++) {
QWidget *widget = itemAt(i)->widget();
const int targetWidth = qMin(widget->sizeHint().width(), rect.width() / searchLocationButtonsCount);
widget->setGeometry(isLeftToRight ? x : rect.right() - x - targetWidth, y, targetWidth, widget->sizeHint().height());
x += widget->width();
}
} else {
for (int i = 0; i < searchLocationButtonsCount; i++) {
QWidget *widget = itemAt(i)->widget();
QSize preferredSize = widget->sizeHint();
widget->setGeometry(isLeftToRight ? x : rect.right() - x - preferredSize.width(), y, preferredSize.width(), preferredSize.height());
x += widget->width() + spacing();
}
}
// We want to align all further widgets the other way. We do this by first filling up the row like usual and then moving all widgets of the current row by
// the remaining space.
std::vector<QWidget *> currentRowWidgets;
for (int i = searchLocationButtonsCount; i < count(); i++) {
QWidget *widget = itemAt(i)->widget();
const int remainingSpace = rect.right() - x + spacing();
if (widget->sizeHint().width() < remainingSpace) {
QSize preferredSize = widget->sizeHint();
widget->setGeometry(isLeftToRight ? x : rect.right() - x - preferredSize.width(), y, preferredSize.width(), preferredSize.height());
x += widget->width() + spacing();
currentRowWidgets.push_back(widget);
continue;
}
// There is not enough space for the next widget. We need to open up a new row.
// Right align all the widgets of the previous row.
for (QWidget *widget : std::as_const(currentRowWidgets)) {
widget->setGeometry(widget->geometry().translated(isLeftToRight ? remainingSpace : -remainingSpace, 0));
}
currentRowWidgets.clear();
x = 0;
y += itemAt(i - 1)->widget()->height() + spacing();
QSize preferredSize = widget->sizeHint();
const int targetWidth = qMin(preferredSize.width(), rect.width());
widget->setGeometry(isLeftToRight ? x : rect.right() - x - targetWidth, y, targetWidth, preferredSize.height());
x += widget->width() + spacing();
currentRowWidgets.push_back(widget);
}
// Right align all the widgets of the previous row.
int remainingSpace = rect.right() - x + spacing();
for (QWidget *widget : std::as_const(currentRowWidgets)) {
widget->setGeometry(widget->geometry().translated(isLeftToRight ? remainingSpace : -remainingSpace, 0));
}
if (sizeHint().height() != oldHeightHint) {
Q_EMIT heightHintChanged();
}
}
QSize BarSecondRowFlowLayout::minimumSize() const
{
return QSize{0, sizeHint().height()};
}
QLayoutItem *BarSecondRowFlowLayout::takeAt(int index)
{
if (index >= 0 && index < itemList.size())
return itemList.takeAt(index);
return nullptr;
}
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