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#include "SelectItemsPopup.h"

#include "ui_SelectItemsPopup.h"

#include <QPushButton>

SelectItemsPopup::SelectItemsPopup(const std::vector<std::string>& available, const std::vector<std::string>& selected, QWidget* parent) :

QDialog(parent),

ui(new Ui::SelectItemsPopup)

{

ui->setupUi(this);

setWindowFlags(Qt::Popup);

// Load initial items

for(const auto& s : available)

{

if(std::find(selected.begin(), selected.end(), s) == selected.end())

new QListWidgetItem(QString::fromStdString(s), ui->listAvailable);

}

for(const auto& s : selected)

new QListWidgetItem(QString::fromStdString(s), ui->listSelected);

}

SelectItemsPopup::~SelectItemsPopup()

{

delete ui;

}

std::vector<std::string> SelectItemsPopup::selectedItems() const

{

std::vector<std::string> result;

for(int i=0;i<ui->listSelected->count();i++)

result.push_back(ui->listSelected->item(i)->text().toStdString());

return result;

}

void SelectItemsPopup::selectItem(const QModelIndex& idx)

{

// Get currently selected iitem if none was provided

QListWidgetItem* item;

if(idx.isValid())

item = ui->listAvailable->item(idx.row());

else

item = ui->listAvailable->currentItem();

if(!item)

return;

// Add it to the selected items list

new QListWidgetItem(item->text(), ui->listSelected);

// Remove it from available items list

delete item;

}

void SelectItemsPopup::unselectItem(const QModelIndex& idx)

{

// Get currently selected iitem if none was provided

QListWidgetItem* item;

if(idx.isValid())

item = ui->listSelected->item(idx.row());

else

item = ui->listSelected->currentItem();

if(!item)

return;

// Add it to the available items list

new QListWidgetItem(item->text(), ui->listAvailable);

// Remove it from selected items list

delete item;

}

void SelectItemsPopup::resizeEvent(QResizeEvent*)

{

// We modify the shape of the dialog to add an arrow shaped edge. See the ascii art image below for details. The edges

// are numbered, their order is the same as in the polygon definition.

/3\

/ \

1---2 4--------5

| |

7------------------6

const int arrow_height = ui->spacer->geometry().height();

const int arrow_width = arrow_height * 3;

const int arrow_position_div = 5;

QPolygon poly;

poly << QPoint(rect().x(), rect().y() + arrow_height)

<< QPoint(rect().x() + rect().width() / arrow_position_div - arrow_width / 2, rect().y() + arrow_height)

<< QPoint(rect().x() + rect().width() / arrow_position_div, rect().y())

<< QPoint(rect().x() + rect().width() / arrow_position_div + arrow_width / 2, rect().y() + arrow_height)

<< QPoint(rect().x() + rect().width(), rect().y() + arrow_height)

<< QPoint(rect().x() + rect().width(), rect().y() + rect().height())

<< QPoint(rect().x(), rect().y() + rect().height());

setMask(QRegion(poly));

}

void SelectItemsPopup::buttonBoxClicked(QAbstractButton* button)

{

if(button == ui->buttonBox->button(QDialogButtonBox::Apply))

accept();

}

void SelectItemsPopup::moveItemUp()

{

moveCurrentItem(false);

}

void SelectItemsPopup::moveItemDown()

{

moveCurrentItem(true);

}

void SelectItemsPopup::moveCurrentItem(bool down)

{

// Get current row number and calculate row number after the movement. Check the values

int currentRow = ui->listSelected->currentRow();

if(currentRow == -1)

return;

int newRow = currentRow + (down ? 1 : -1);

if(newRow < 0)

return;

if(newRow >= ui->listSelected->count())

return;

// Swap items

ui->listSelected->insertItem(newRow, ui->listSelected->takeItem(currentRow));

// Select old item at new position

ui->listSelected->setCurrentRow(newRow);

}

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