Initial commit

example/Example.pro

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+#
+# Copyright (c) 2023 Alex Spataru <https://github.com/alex-spataru>
+#
+# Permission is hereby granted, free of charge, to any person obtaining a copy
+# of this software and associated documentation files (the "Software"), to deal
+# in the Software without restriction, including without limitation the rights
+# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+# copies of the Software, and to permit persons to whom the Software is
+# furnished to do so, subject to the following conditions:
+#
+# The above copyright notice and this permission notice shall be included in
+# all copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+# THE SOFTWARE.
+#
+
+TEMPLATE = app
+TARGET = QR-Example
+
+QT += core gui svg widgets
+
+include(../Qt-QrCodeGenerator.pri)
+
+HEADERS += \
+    MainWindow.h
+
+SOURCES += \
+    MainWindow.cpp \
+    main.cpp

example/MainWindow.cpp

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+/*
+ * Copyright (c) 2023 Alex Spataru <https://github.com/alex-spataru>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#include "MainWindow.h"
+
+MainWindow::MainWindow() {
+    // Initialize layout-related widgets
+    m_centralWidget = new QWidget(this);
+    m_header = new QWidget(m_centralWidget);
+
+    // Initialize horizontal layout widgets
+    m_label = new QLabel(tr("Message") + ": ", m_header);
+    m_pushButton = new QPushButton(tr("Generate QR Code"), m_header);
+    m_lineEdit = new QLineEdit(m_header);
+
+    // Initialize QR code image label
+    m_qrCodeDisplay = new QLabel(m_centralWidget);
+    m_qrCodeDisplay->setMinimumSize(QSize(500, 500));
+    m_qrCodeDisplay->setMaximumSize(QSize(500, 500));
+
+    // Setup horizontal layout for line edit & push button
+    m_verticalLayout = new QVBoxLayout(m_centralWidget);
+    m_headerLayout = new QHBoxLayout(m_header);
+    m_headerLayout->addWidget(m_label);
+    m_headerLayout->addWidget(m_lineEdit);
+    m_headerLayout->addWidget(m_pushButton);
+    m_headerLayout->setContentsMargins(0, 0, 0, 0);
+    m_headerLayout->setStretch(1, 1);
+
+    // Setup vertical layout with QR code label & QR code generation controls
+    m_verticalLayout->addWidget(m_header);
+    m_verticalLayout->addWidget(m_qrCodeDisplay);
+    m_verticalLayout->setStretch(0, 1);
+
+    // Set central widget & resize window to minimum size possible
+    setCentralWidget(m_centralWidget);
+    setFixedSize(minimumSize());
+
+    // Set window title
+    setWindowTitle(tr("QR Code Generator"));
+
+    // Disable "Generate QR code" button when line edit contains empty text
+    connect(m_lineEdit, &QLineEdit::textChanged, this, [this](const QString& text) {
+        m_pushButton->setEnabled(!text.isEmpty());
+    });
+
+    // Update QR code when user clicks on the generate QR code button
+    connect(m_pushButton, &QPushButton::clicked, this, &MainWindow::onGenerateButtonClicked);
+
+    // Set "Hello World" text & generate QR code
+    m_lineEdit->setText(tr("Hello World!"));
+    onGenerateButtonClicked();
+}
+
+MainWindow::~MainWindow() {
+    delete m_label;
+    delete m_lineEdit;
+    delete m_pushButton;
+    delete m_qrCodeDisplay;
+    delete m_headerLayout;
+    delete m_verticalLayout;
+    delete m_header;
+    delete m_centralWidget;
+}
+
+void MainWindow::onGenerateButtonClicked() {
+    // Get text from line edit
+    auto text = m_lineEdit->text();
+
+    // Generate QR code from text
+    auto image = m_generator.generateQr(text);
+
+    // Display generated image
+    m_qrCodeDisplay->setPixmap(QPixmap::fromImage(image));
+}

example/MainWindow.h

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+/*
+ * Copyright (c) 2023 Alex Spataru <https://github.com/alex-spataru>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#include <QApplication>
+#include <QLabel>
+#include <QMainWindow>
+#include <QVBoxLayout>
+#include <QHBoxLayout>
+#include <QLineEdit>
+#include <QPushButton>
+
+#include <QrCodeGenerator.h>
+
+class MainWindow : public QMainWindow {
+    Q_OBJECT
+
+public:
+    explicit MainWindow();
+    ~MainWindow();
+
+private Q_SLOTS:
+    void onGenerateButtonClicked();
+
+private:
+    QrCodeGenerator m_generator;
+
+    QWidget *m_header;
+    QWidget *m_centralWidget;
+
+    QLabel *m_label;
+    QLineEdit *m_lineEdit;
+    QLabel *m_qrCodeDisplay;
+    QPushButton *m_pushButton;
+
+    QHBoxLayout *m_headerLayout;
+    QVBoxLayout *m_verticalLayout;
+};

example/main.cpp

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+/*
+ * Copyright (c) 2023 Alex Spataru <https://github.com/alex-spataru>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#include "MainWindow.h"
+
+int main(int argc, char** argv) {
+    QApplication app(argc, argv);
+    MainWindow window;
+    window.show();
+    return app.exec();
+}