Qt 6 compatibility with CI build

.github/workflows/main.yml

@@ -0,0 +1,35 @@
+name: Linux CI
+
+on:
+  push:
+    branches: [ "master" ]
+  pull_request:
+    branches: [ "master" ]
+
+env:
+  # Customize the CMake build type here (Release, Debug, RelWithDebInfo, etc.)
+  BUILD_TYPE: Release
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+    - name: checkout
+      uses: actions/checkout@v3
+    - name: Install Qt
+      uses: jurplel/install-qt-action@v3.3.0
+      with:
+        version: '6.5.0'
+        host: 'linux'
+        target: 'desktop'
+        arch: 'gcc_64'
+        modules: 'qtnetworkauth'
+        archives: 'icu qtbase qtsvg'
+        aqtversion: '==3.1.*'
+    - name: Configure CMake
+      # Configure CMake in a 'build' subdirectory. `CMAKE_BUILD_TYPE` is only required if you are using a single-configuration generator such as make.
+      # See https://cmake.org/cmake/help/latest/variable/CMAKE_BUILD_TYPE.html?highlight=cmake_build_type
+      run: cmake -B ${{github.workspace}}/build -DCMAKE_CXX_STANDARD=14 -DCMAKE_BUILD_TYPE=${{env.BUILD_TYPE}}
+    - name: Build 
+      # Build your program with the given configuration
+      run: cmake --build ${{github.workspace}}/build

CMakeLists.txt

@@ -75,9 +75,9 @@ set(CMAKE_AUTOMOC On)
 set(CMAKE_AUTORCC ON)
 
 # Find includes in corresponding build directories
-find_package(Qt5Core    CONFIG REQUIRED)
-find_package(Qt5Widgets CONFIG REQUIRED)
-find_package(Qt5Gui     CONFIG REQUIRED)
+find_package(Qt6Core    CONFIG REQUIRED)
+find_package(Qt6Widgets CONFIG REQUIRED)
+find_package(Qt6Gui     CONFIG REQUIRED)
 
 add_library(QCodeEditor STATIC
     ${RESOURCES_FILE}
@@ -92,7 +92,6 @@ target_include_directories(QCodeEditor PUBLIC
 if(CMAKE_COMPILER_IS_GNUCXX)
     target_compile_options(QCodeEditor
 		PRIVATE
-		-ansi
 		-pedantic
 		-Wall
 		-Wextra
@@ -104,7 +103,7 @@ if(CMAKE_COMPILER_IS_GNUCXX)
 endif(CMAKE_COMPILER_IS_GNUCXX)
 
 target_link_libraries(QCodeEditor
-    Qt5::Core
-    Qt5::Widgets
-    Qt5::Gui
+    Qt::Core
+    Qt::Widgets
+    Qt::Gui
 )

example/CMakeLists.txt

@@ -6,9 +6,9 @@ set(CMAKE_CXX_STANDARD 17)
 set(CMAKE_AUTOMOC On)
 set(CMAKE_AUTORCC ON)
 
-find_package(Qt5Core    CONFIG REQUIRED)
-find_package(Qt5Widgets CONFIG REQUIRED)
-find_package(Qt5Gui     CONFIG REQUIRED)
+find_package(Qt6Core    CONFIG REQUIRED)
+find_package(Qt6Widgets CONFIG REQUIRED)
+find_package(Qt6Gui     CONFIG REQUIRED)
 
 add_executable(QCodeEditorExample
     resources/demo_resources.qrc
@@ -22,8 +22,8 @@ target_include_directories(QCodeEditorExample PUBLIC
 )
 
 target_link_libraries(QCodeEditorExample
-    Qt5::Core
-    Qt5::Widgets
-    Qt5::Gui
+    Qt::Core
+    Qt::Widgets
+    Qt::Gui
     QCodeEditor
-)
+)

example/src/MainWindow.cpp

@@ -15,13 +15,14 @@
 #include <QPythonHighlighter>
 
 // Qt
-#include <QComboBox>
-#include <QVBoxLayout>
-#include <QHBoxLayout>
 #include <QCheckBox>
-#include <QSpinBox>
+#include <QComboBox>
+#include <QFile>
 #include <QGroupBox>
+#include <QHBoxLayout>
 #include <QLabel>
+#include <QSpinBox>
+#include <QVBoxLayout>
 
 MainWindow::MainWindow(QWidget* parent) :
     QMainWindow(parent),

src/internal/QCodeEditor.cpp

@@ -537,16 +537,17 @@ void QCodeEditor::keyPressEvent(QKeyEvent* e) {
 
     // Shortcut for moving line to left
     if (m_replaceTab && e->key() == Qt::Key_Backtab) {
-      indentationLevel = std::min(indentationLevel, m_tabReplace.size());
+        indentationLevel = std::min(indentationLevel, (int) m_tabReplace.size());
 
-      auto cursor = textCursor();
+        auto cursor = textCursor();
 
-      cursor.movePosition(QTextCursor::MoveOperation::StartOfLine);
-      cursor.movePosition(QTextCursor::MoveOperation::Right,
-                          QTextCursor::MoveMode::KeepAnchor, indentationLevel);
+        cursor.movePosition(QTextCursor::MoveOperation::StartOfLine);
+        cursor.movePosition(QTextCursor::MoveOperation::Right,
+                            QTextCursor::MoveMode::KeepAnchor,
+                            indentationLevel);
 
-      cursor.removeSelectedText();
-      return;
+        cursor.removeSelectedText();
+        return;
     }
 
     QTextEdit::keyPressEvent(e);

src/internal/QLanguage.cpp

@@ -32,18 +32,15 @@ bool QLanguage::load(QIODevice* device)
 
         if (type == QXmlStreamReader::TokenType::StartElement)
         {
-            if (reader.name() == "section")
-            {
+            if (reader.name().toString() == "section") {
                 if (!list.empty())
                 {
                     m_list[name] = list;
                     list.clear();
                 }
 
                 name = reader.attributes().value("name").toString();
-            }
-            else if (reader.name() == "name")
-            {
+            } else if (reader.name().toString() == "name") {
                 readText = true;
             }
         }

src/internal/QSyntaxStyle.cpp

@@ -25,15 +25,12 @@ bool QSyntaxStyle::load(QString fl)
 
         if(token == QXmlStreamReader::StartElement)
         {
-            if (reader.name() == "style-scheme")
-            {
+            if (reader.name().toString() == "style-scheme") {
                 if (reader.attributes().hasAttribute("name"))
                 {
                     m_name = reader.attributes().value("name").toString();
                 }
-            }
-            else if (reader.name() == "style")
-            {
+            } else if (reader.name().toString() == "style") {
                 auto attributes = reader.attributes();
 
                 auto name = attributes.value("name");
@@ -50,21 +47,19 @@ bool QSyntaxStyle::load(QString fl)
                     format.setForeground(QColor(attributes.value("foreground").toString()));
                 }
 
-                if (attributes.hasAttribute("bold") &&
-                    attributes.value("bold") == "true")
-                {
+                if (attributes.hasAttribute("bold")
+                    && attributes.value("bold").toString() == "true") {
                     format.setFontWeight(QFont::Weight::Bold);
                 }
 
-                if (attributes.hasAttribute("italic") &&
-                    attributes.value("italic") == "true")
-                {
+                if (attributes.hasAttribute("italic")
+                    && attributes.value("italic").toString() == "true") {
                     format.setFontItalic(true);
                 }
 
                 if (attributes.hasAttribute("underlineStyle"))
                 {
-                    auto underline = attributes.value("underlineStyle");
+                    auto underline = attributes.value("underlineStyle").toString();
 
                     auto s = QTextCharFormat::UnderlineStyle::NoUnderline;