BPI-CM9-Linux/aml-comp/vendor/amlogic/linux_sample_app/aml-qt-rxpreview/Page5.cpp

#include "Page5.h"
#include <QScreen>
#include <QGuiApplication>
#include <QMenu>
#include <QClipboard>
#include <QApplication>
#include <QPainter>


DraggableBox::DraggableBox(QWidget *parent, int initialOpacity) : QLabel(parent) {
    setFixedSize(645, 365);  // Set the box size
    setStyleSheet("background-color: rgba(0, 0, 0, 0); "
                  "color: white; font-size: 20px; font-weight: bold;");

    opacitySlider = new QSlider(Qt::Horizontal, this);
    opacitySlider->setRange(0, 255);  // Set the slider range
    opacitySlider->setValue(initialOpacity);
    opacitySlider->raise();

    opacitySlider->setGeometry(10, height() - 20, width() - 20, 30); // Set the slider position and size
    // Set the slider style
    opacitySlider->setStyleSheet(R"(
        QSlider::groove:horizontal {
            border: 1px solid #bbb;
            background: #ddd;
            height: 8px;
            border-radius: 4px;
        }
        QSlider::handle:horizontal {
            background: red;
            border: 1px solid #555;
            width: 18px;
            height: 18px;
            margin: -5px 0;
            border-radius: 9px;
        }
    )");
    connect(opacitySlider, &QSlider::valueChanged, this, &DraggableBox::updateOpacity);
    updateOpacity(initialOpacity);

    coordLabel = new QLabel(parent);
    coordLabel->setStyleSheet("color: white; font-size: 20px; font-weight: bold; background-color: rgba(0, 0, 0, 128); padding: 5px; border-radius: 5px;");
    coordLabel->setAlignment(Qt::AlignCenter);
    coordLabel->setFixedSize(120, 40);
    coordLabel->show();
    updateCoordLabel();
}

void DraggableBox::mousePressEvent(QMouseEvent *event) {
    if (event->button() == Qt::LeftButton) {
        dragStartPos = event->pos();
    }
}

void DraggableBox::mouseMoveEvent(QMouseEvent *event) {
    if (event->buttons() & Qt::LeftButton) {
        QPoint newPos = pos() + event->pos() - dragStartPos;

        newPos.setX(qMax(0, qMin(newPos.x(), parentWidget()->width() - width())));
        newPos.setY(qMax(0, qMin(newPos.y(), parentWidget()->height() - height())));

        QPoint screenPos = parentWidget()->mapToGlobal(newPos);

        move(screenPos);
        updateCoordLabel();
    }
}

void DraggableBox::updateCoordLabel() {
    coordLabel->setText(QString("%1, %2").arg(x() + 10).arg(y() + 10));
    coordLabel->move(x(), y() - 40);  // The coordinate box is placed above the box
}

void DraggableBox::contextMenuEvent(QContextMenuEvent *event) {
    QMenu menu;
    QAction *copyAction = new QAction("copy rectangle parameter", &menu);
    connect(copyAction, &QAction::triggered, [this]() {
        QString rectangle = QString("rectangle=%1,%2,%3,%4").arg(x()).arg(y()).arg(width()).arg(height());
        QClipboard *clipboard = QApplication::clipboard();
        clipboard->setText(rectangle);
    });

    menu.addAction(copyAction);
    menu.exec(event->globalPos());
}

// function for updating transparency
void DraggableBox::updateOpacity(int value) {
    QColor color = palette().color(QPalette::Window);
    color.setAlpha(value);
    QPalette palette;
    palette.setColor(QPalette::Window, color);
    setPalette(palette);
}

void DraggableBox::paintEvent(QPaintEvent *event) {
    QLabel::paintEvent(event);

    QPainter painter(this);
    painter.setPen(QPen(Qt::green, 5));
    painter.setBrush(QBrush(QColor(255, 255, 255, opacitySlider->value())));
    painter.drawRect(0, 0, width() - 1, height() - 1);
}

Page5::Page5(QWidget *parent) : QWidget(parent) {
    setWindowTitle("Page5 - Draggable Boxes");
    setAttribute(Qt::WA_TranslucentBackground);  // Set as transparent background
    setWindowFlags(Qt::FramelessWindowHint | Qt::WindowStaysOnTopHint);
    setAttribute(Qt::WA_TransparentForMouseEvents, false);  // Don't make controls transparent to mouse events

    QScreen *screen = QGuiApplication::primaryScreen();
    QSize screenSize = screen->size();

    QString buttonStylesheet = "QPushButton {"
                               "    background-color: #34495e;"
                               "    border: none;"
                               "    color: white;"
                               "    padding: 10px 20px;"
                               "    text-align: center;"
                               "    text-decoration: none;"
                               "    display: inline-block;"
                               "    font-size: 30px;"
                               "    border-radius: 8px;"
                               "    box-shadow: 0px 2px 4px rgba(0, 0, 0, 0.1);"
                               "}"
                               "QPushButton:hover {"
                               "    background-color: #2c3e50;"
                               "    cursor: pointer;"
                               "}"
                               "QPushButton:pressed {"
                               "    background-color: #273746;"
                               "    box-shadow: inset 0px 2px 4px rgba(0, 0, 0, 0.1);"
                               "}";

    DraggableBox *firstBox = new DraggableBox(this, 0);
    firstBox->move(90, 90);
    firstBox->show();
    boxes.append(firstBox);

    DraggableBox *box2 = new DraggableBox(this, 128);
    QPoint globalPos(990, 90);
    box2->setObjectName("box2");
    QPoint localPos = mapFromGlobal(globalPos);
    box2->move(localPos);
    box2->raise();
    box2->show();
    boxes.append(box2);
    box2->updateCoordLabel();

    pButtonAddBox = new QPushButton("Add", this);
    pButtonAddBox->setStyleSheet(buttonStylesheet);
    pButtonAddBox->setGeometry(screenSize.width() / 4 * 2,  screenSize.height() / 10 * 9, 80, 30);
    pButtonAddBox->move(screenSize.width() / 4 * 1,  screenSize.height() / 10 * 9);
    pButtonAddBox->resize(screenSize.width() / 16 ,screenSize.height() / 108 * 3);
    pButtonAddBox->setWindowFlags(Qt::WindowStaysOnTopHint);
    pButtonAddBox->setAttribute(Qt::WA_AlwaysStackOnTop);
    pButtonAddBox->raise();
    connect(pButtonAddBox, &QPushButton::clicked, this, &Page5::addBox);

    pButtonClear = new QPushButton("Clear", this);
    pButtonClear->setStyleSheet(buttonStylesheet);
    pButtonClear->setGeometry(screenSize.width() / 4 * 2,  screenSize.height() / 10 * 9, 80, 30);
    pButtonClear->move(screenSize.width() / 4 * 2 + 100,  screenSize.height() / 10 * 9);
    pButtonClear->resize(screenSize.width() / 16 ,screenSize.height() / 108 * 3);
    pButtonClear->setWindowFlags(Qt::WindowStaysOnTopHint);
    pButtonClear->setAttribute(Qt::WA_AlwaysStackOnTop);
    pButtonClear->raise();
    connect(pButtonClear, &QPushButton::clicked, this, &Page5::clearBoxes);

    installEventFilter(this);
}

Page5::~Page5() {}

void Page5::addBox() {
    int opacity = (boxes.isEmpty()) ? 0 : 128;
    DraggableBox *box = new DraggableBox(this, opacity);
    box->move(90, 90);
    box->show();
    boxes.append(box);
}

void DraggableBox::hideCoordLabel() {
    coordLabel->hide();
}

void Page5::clearBoxes() {
    for (DraggableBox *box : boxes) {
        box->hideCoordLabel();
        box->deleteLater();
    }
    boxes.clear();
}

bool Page5::eventFilter(QObject *obj, QEvent *event) {
    if (event->type() == QEvent::MouseButtonPress ||
        event->type() == QEvent::MouseButtonRelease ||
        event->type() == QEvent::MouseMove) {

        QMouseEvent *mouseEvent = static_cast<QMouseEvent *>(event);
        QWidget *child = childAt(mouseEvent->pos());

        if (child) {
            return QApplication::sendEvent(child, event);
        }
    }
    return QWidget::eventFilter(obj, event);
}