qt-migration-legatus/scripts/create-qt5-legacy-benchmark.sh

#!/usr/bin/env bash
set -euo pipefail

TARGET_DIR="${1:-qt5-before/qt5-legacy-migration-benchmark}"
mkdir -p "${TARGET_DIR}"

cat > "${TARGET_DIR}/CMakeLists.txt" <<'FILE_EOF'
cmake_minimum_required(VERSION 3.10)

project(Qt5LegacyMigrationBenchmark LANGUAGES CXX)

set(CMAKE_CXX_STANDARD 11)
set(CMAKE_CXX_STANDARD_REQUIRED ON)

set(CMAKE_AUTOMOC ON)
set(CMAKE_AUTOUIC ON)
set(CMAKE_AUTORCC ON)

find_package(Qt5 REQUIRED COMPONENTS Core Gui Widgets)

add_executable(Qt5LegacyMigrationBenchmark
    main.cpp
    MainWindow.h
    MainWindow.cpp
    MainWindow.ui
    resources.qrc
)

target_link_libraries(Qt5LegacyMigrationBenchmark
    Qt5::Core
    Qt5::Gui
    Qt5::Widgets
)
FILE_EOF

cat > "${TARGET_DIR}/MainWindow.h" <<'FILE_EOF'
#pragma once

#include <QMainWindow>
#include <QRegExp>

QT_BEGIN_NAMESPACE
namespace Ui {
class MainWindow;
}
QT_END_NAMESPACE

class MainWindow : public QMainWindow
{
    Q_OBJECT

public:
    explicit MainWindow(QWidget *parent = 0);
    ~MainWindow();

private slots:
    void onValidateClicked();
    void onScreenInfoClicked();

private:
    Ui::MainWindow *ui;
    QRegExp legacyPattern;
};
FILE_EOF

cat > "${TARGET_DIR}/MainWindow.cpp" <<'FILE_EOF'
#include "MainWindow.h"
#include "ui_MainWindow.h"

#include <QApplication>
#include <QDesktopWidget>
#include <QTextCodec>
#include <QPixmap>
#include <QString>
#include <QRect>

MainWindow::MainWindow(QWidget *parent)
    : QMainWindow(parent)
    , ui(new Ui::MainWindow)
    , legacyPattern("^[A-Za-z]+\\d+$")
{
    ui->setupUi(this);

    QTextCodec *codec = QTextCodec::codecForName("UTF-8");
    QString title = codec->toUnicode("Qt5 Legacy Migration Benchmark");
    setWindowTitle(title);

    ui->label->setText(codec->toUnicode("Bitte Text wie Test123 eingeben."));
    ui->iconLabel->setPixmap(QPixmap(":/icons/app.png").scaled(48, 48));

    connect(ui->validateButton, SIGNAL(clicked()), this, SLOT(onValidateClicked()));
    connect(ui->screenButton, SIGNAL(clicked()), this, SLOT(onScreenInfoClicked()));
}

MainWindow::~MainWindow()
{
    delete ui;
}

void MainWindow::onValidateClicked()
{
    QString text = ui->lineEdit->text();

    if (legacyPattern.exactMatch(text)) {
        ui->resultLabel->setText("Match");
    } else {
        ui->resultLabel->setText("No match");
    }
}

void MainWindow::onScreenInfoClicked()
{
    QRect screenGeometry = QApplication::desktop()->screenGeometry();
    QString info = QString("Screen: %1x%2")
        .arg(screenGeometry.width())
        .arg(screenGeometry.height());

    ui->resultLabel->setText(info);
}
FILE_EOF

cat > "${TARGET_DIR}/main.cpp" <<'FILE_EOF'
#include <QApplication>
#include <QTextCodec>
#include "MainWindow.h"

int main(int argc, char *argv[])
{
#if QT_VERSION < QT_VERSION_CHECK(6, 0, 0)
    QTextCodec::setCodecForLocale(QTextCodec::codecForName("UTF-8"));
#endif

    QApplication a(argc, argv);
    MainWindow w;
    w.show();

    return a.exec();
}
FILE_EOF

cat > "${TARGET_DIR}/MainWindow.ui" <<'FILE_EOF'
<?xml version="1.0" encoding="UTF-8"?>
<ui version="4.0">
 <class>MainWindow</class>
 <widget class="QMainWindow" name="MainWindow">
  <property name="geometry">
   <rect>
    <x>0</x>
    <y>0</y>
    <width>420</width>
    <height>240</height>
   </rect>
  </property>
  <property name="windowTitle">
   <string>Qt5 Legacy App</string>
  </property>
  <widget class="QWidget" name="centralwidget">
   <layout class="QVBoxLayout" name="verticalLayout">
    <item>
     <widget class="QLabel" name="label">
      <property name="text">
       <string>Initial text</string>
      </property>
     </widget>
    </item>
    <item>
     <widget class="QLineEdit" name="lineEdit">
      <property name="placeholderText">
       <string>Enter value like Test123</string>
      </property>
     </widget>
    </item>
    <item>
     <widget class="QLabel" name="iconLabel">
      <property name="text">
       <string/>
      </property>
     </widget>
    </item>
    <item>
     <layout class="QHBoxLayout" name="buttonLayout">
      <item>
       <widget class="QPushButton" name="validateButton">
        <property name="text">
         <string>Validate</string>
        </property>
       </widget>
      </item>
      <item>
       <widget class="QPushButton" name="screenButton">
        <property name="text">
         <string>Screen Info</string>
        </property>
       </widget>
      </item>
     </layout>
    </item>
    <item>
     <widget class="QLabel" name="resultLabel">
      <property name="text">
       <string>Result appears here</string>
      </property>
     </widget>
    </item>
   </layout>
  </widget>
 </widget>
 <resources/>
 <connections/>
</ui>
FILE_EOF

cat > "${TARGET_DIR}/resources.qrc" <<'FILE_EOF'
<RCC>
  <qresource prefix="/icons">
    <file>app.png</file>
  </qresource>
</RCC>
FILE_EOF

(
  cd "${TARGET_DIR}"
  python3 - <<'FILE_EOF'
import base64
png = base64.b64decode(
    "iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAQAAAC1HAwCAAAAC0lEQVR42mP8/x8AAusB9Wn8nKsAAAAASUVORK5CYII="
)
with open("app.png", "wb") as f:
    f.write(png)
FILE_EOF
)

echo "Qt5 legacy benchmark created at: ${TARGET_DIR}"