Add QML and QML Example (#187)

Make qmarkdowntextedit static...

Update build.yml

Update build.yml

Link to  Qml

`qmlplugin`: Link to Qml

Try to fix build

MAKE IT WORK!!!!!

Remove old file

Revert workflow changes

Remove old file, sync qmarkdowntextedit.cpp/h with upstream

Dont't force static

Add missing `highlightingEnabled` - function

Move qml stuff into seperate folder, make Quick dependency optional

Add missing file

Don't force Qt6, might work with Qt5

Made it work with Qt 5.12

Fix build if Qt Quick is not installed

Remove unneeded include

Remove old code

Add missing `highlightingEnabled` - function

Co-authored-by: Tim Gromeyer <tim.gromeyer@gmail.com>

CMakeLists.txt

@@ -1,4 +1,4 @@
-cmake_minimum_required(VERSION 3.16) # Qt requires CMake 3.16
+cmake_minimum_required(VERSION 3.16) # Qt requires CMake 3.16
 project(qmarkdowntextedit LANGUAGES CXX VERSION 1.0.0)
 
 #set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++11")
@@ -16,6 +16,7 @@ option(QMARKDOWNTEXTEDIT_EXE "Build test executable" ON)
 # find qt
 find_package(QT NAMES Qt6 Qt5 REQUIRED COMPONENTS Widgets)
 find_package(Qt${QT_VERSION_MAJOR} REQUIRED COMPONENTS Widgets)
+find_package(Qt${QT_VERSION_MAJOR} OPTIONAL_COMPONENTS Quick)
 
 # needed for windows
 if(WIN32)
@@ -60,6 +61,13 @@ target_link_libraries(qmarkdowntextedit PUBLIC
     ${INTL_LDFLAGS}
 )
 
+if (Qt${QT_VERSION_MAJOR}Quick_FOUND)
+    target_link_libraries(qmarkdowntextedit PUBLIC Qt${QT_VERSION_MAJOR}::Quick)
+
+    add_executable(QtQuickExample examples/qml/example.cpp examples/qml/ressources.qrc)
+    target_link_libraries(QtQuickExample PRIVATE Qt${QT_VERSION_MAJOR}::Quick qmarkdowntextedit)
+endif()
+
 # QMarkdownTextEdit executable
 if(QMARKDOWNTEXTEDIT_EXE)
     set(SOURCE_FILES

examples/qml/example.cpp

@@ -0,0 +1,24 @@
+#include <QApplication>
+#include <QQmlApplicationEngine>
+
+#include "markdownhighlighter.h"
+
+int main(int argc, char *argv[]) {
+    QApplication app(argc, argv);
+
+    qmlRegisterType<MarkdownHighlighter>("MarkdownHighlighter", 1, 0,
+                                         "MarkdownHighlighter");
+
+    QQmlApplicationEngine engine;
+
+    const QUrl url(QStringLiteral("qrc:/example.qml"));
+    QObject::connect(
+        &engine, &QQmlApplicationEngine::objectCreated, &app,
+        [url](QObject *obj, const QUrl &objUrl) {
+            if (!obj && url == objUrl) QCoreApplication::exit(-1);
+        },
+        Qt::QueuedConnection);
+    engine.load(url);
+
+    return app.exec();
+}

examples/qml/example.qml

@@ -0,0 +1,22 @@
+import QtQuick 2.0
+import QtQuick.Window 2.0
+import MarkdownHighlighter 1.0
+
+Window {
+    id: mainwindow
+    width: 640
+    height: 400
+    visible: true
+    title: qsTr("QtQuick Project")
+
+    TextEdit {
+        id: editor
+        text: "# Hello world!"
+        focus: true
+    }
+
+    MarkdownHighlighter {
+        id: syntaxHighlighter
+        textDocument: editor.textDocument
+    }
+}

examples/qml/ressources.qrc

@@ -0,0 +1,5 @@
+<RCC>
+    <qresource prefix="/">
+        <file>example.qml</file>
+    </qresource>
+</RCC>

markdownhighlighter.h

@@ -19,6 +19,10 @@
 #include <QSyntaxHighlighter>
 #include <QTextCharFormat>
 
+#ifdef QT_QUICK_LIB
+#include <QQuickTextDocument>
+#endif
+
 QT_BEGIN_NAMESPACE
 class QTextDocument;
 
@@ -27,6 +31,25 @@ QT_END_NAMESPACE
 class MarkdownHighlighter : public QSyntaxHighlighter {
     Q_OBJECT
 
+#ifdef QT_QUICK_LIB
+    Q_PROPERTY(QQuickTextDocument *textDocument READ textDocument WRITE
+                   setTextDocument NOTIFY textDocumentChanged)
+
+    QQuickTextDocument *m_quickDocument = nullptr;
+
+   signals:
+    void textDocumentChanged();
+
+   public:
+    inline QQuickTextDocument *textDocument() const { return m_quickDocument; };
+    void setTextDocument(QQuickTextDocument *textDocument) {
+        if (!textDocument) return;
+        m_quickDocument = textDocument;
+        setDocument(m_quickDocument->textDocument());
+        Q_EMIT textDocumentChanged();
+    };
+#endif
+
    public:
     enum HighlightingOption {
         None = 0,