79 lines
3.3 KiB
C++
79 lines
3.3 KiB
C++
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// ImageDisplayThread.cpp
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#include <QtWidgets>
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#include <QLabel>
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#include <QVBoxLayout>
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#include <QScreen>
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#include <QGuiApplication>
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#include "Page3.h"
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Page3::Page3(QWidget *parent) {
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// Get the primary screen
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QScreen *screen = QGuiApplication::primaryScreen();
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// Get the size of the primary screen (assuming it's the 4K screen)
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QSize screenSize = screen->size();
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// Add a photo to the first page
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QPixmap photo(":/my/photo/fleur-SE2zTdS1MNo-unsplash.jpg"); // Replace with the actual path to your photo
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this->plabelPhoto1_1 = new QLabel(this);
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this->plabelPhoto1_1->setPixmap(photo.scaled(screenSize.width(), screenSize.height())); // Scale the photo to fill the page while maintaining aspect ratio
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this->plabelPhoto1_1->setGeometry(0, 0, screenSize.width(), screenSize.height()); // Set the position and size of the photo
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// "Page 1 Content" label
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this->pLabelPage1 = new QLabel("brightness", this);
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this->pLabelPage1->move(0, 0); // Set the position of the label, x-coordinate is 100, y-coordinate is 50
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// Set the font size of the label
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this->pLabelPage1->setFont(QFont("Arial", screenSize.width() / 96 )); // Use Arial font with font size in pixels
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// Set the size of the label to fit the text size and add extra padding
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this->pLabelPage1->setFixedSize(this->pLabelPage1->fontMetrics().boundingRect("brightness").size() + QSize(20, 10));
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// Slider
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this->psliderPage1 = new QSlider(Qt::Horizontal, this); // Horizontal slider
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psliderPage1->resize(screenSize.width() * 3 / 5, 200); // Set the size of the slider, width is 300, height is 50
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psliderPage1->move(screenSize.width() * 1 / 5, screenSize.height() / 50); // Set the position of the slider, x-coordinate is 200, y-coordinate is 200
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psliderPage1->setMinimum(0); // Minimum value
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psliderPage1->setMaximum(255); // Maximum value, assuming the maximum brightness value is 19200
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psliderPage1->setValue(255); // Set the default brightness value
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// Connect the slider to the slot function
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connect(psliderPage1, &QSlider::valueChanged, this, &Page3::onSliderValueChanged);
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}
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// Function: Set screen brightness
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bool Page3::onSliderValueChanged(int brightness)
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{
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// Limit the brightness value within a reasonable range (typically between 0 and the maximum brightness value)
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const int minBrightness = 0;
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const int maxBrightness = 255; // Assume maximum brightness value is 255
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brightness = qBound(minBrightness, brightness, maxBrightness);
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// Convert brightness value to string
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QString brightnessStr = QString::number(brightness);
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// Open the brightness file and write the brightness value
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std::ofstream brightnessFile("/sys/class/backlight/aml-bl/brightness");
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if (!brightnessFile.is_open())
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{
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std::cerr << "Unable to open file /sys/class/backlight/aml-bl/brightness\n";
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return false;
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}
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brightnessFile << brightnessStr.toStdString();
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brightnessFile.close();
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return true;
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}
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Page3::~Page3()
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{
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// Release dynamically allocated resources in the destructor
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// Delete member variable objects
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delete pLabelPage1;
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delete plabelPhoto1_1;
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delete psliderPage1;
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// Other member variables do not need to be manually deleted as they are automatic objects and will be destroyed automatically when the function exits
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}
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