diff --git a/examples/dlearn/appSettings.d b/examples/dlearn/appSettings.d
new file mode 100644
index 00000000..af09acd8
--- /dev/null
+++ b/examples/dlearn/appSettings.d
@@ -0,0 +1,41 @@
+//module appSettings;
+
+import dlangui.core.settings;
+import dlangui.core.i18n;
+// import dlangui.dialogs.dialog;
+//import dlangui.graphics.fonts;
+
+import std.algorithm : equal;
+
+const AVAILABLE_LANGUAGES = ["en", "cn"];
+
+class AppSettings : SettingsFile {
+
+    this(string filename) {
+        super(filename);
+    }
+
+    override void updateDefaults() {
+        Setting ui = uiSettings();
+        ui.setStringDef("language", "cn");
+    }
+
+    /// override to do something after loading - e.g. set defaults
+    override void afterLoad() {
+    }
+    
+    @property string uiLanguage() {
+        return limitString(uiSettings.getString("language", "cn"), AVAILABLE_LANGUAGES);
+    }
+
+    @property AppSettings uiLanguage(string v) {
+        uiSettings.setString("language", limitString(v, AVAILABLE_LANGUAGES));
+        return this;
+    }
+
+    @property Setting uiSettings() {
+	Setting res = _setting.objectByPath("interface", true);
+	return res;
+    }
+}
+
diff --git a/examples/dlearn/dlearn.d b/examples/dlearn/dlearn.d
new file mode 100644
index 00000000..0b95230c
--- /dev/null
+++ b/examples/dlearn/dlearn.d
@@ -0,0 +1,356 @@
+module dlearn;
+
+import dlangui;
+import dlangui.core.logger;
+import dlangui.dialogs.filedlg;
+import dlangui.dialogs.dialog;
+import dlangui.dml.dmlhighlight;
+import dlangui.widgets.metadata;
+import std.array : replaceFirst;
+import std.algorithm;
+import std.process;
+import std.stdio;
+import std.array;
+import std.file;
+import std.path;
+
+import dlangui.dialogs.settingsdialog;
+import settings;
+import appSettings;
+
+mixin APP_ENTRY_POINT;
+
+enum IDEActions : int {
+    About = 1010000,
+    Lang
+}
+
+dstring SAMPLE_SOURCE_CODE = q{import std.stdio;
+import std.path;
+import std.file;
+import std.string;
+import std.algorithm;
+import std.array;
+import std.conv;
+import std.typecons;
+
+int main() {
+    
+    
+    writeln("Ok!");
+    return 0;
+}
+};
+
+const Action ACTION_ABOUT = new Action(IDEActions.About, "MENU_ABOUT"c, "document-about", KeyCode.KEY_A, KeyFlag.Control);
+const Action ACTION_LANG = new Action(IDEActions.Lang, "MENU_LANG"c, "document-lang", KeyCode.KEY_L, KeyFlag.Control);
+
+string BUTTONS_CODE = q{
+    HorizontalLayout {
+    	layoutWidth: FILL_PARENT
+    	layoutHeight: 20
+    	alignment: HCenter
+    
+    	Button { id: btnRun; text: "compile/run"; 
+		margins: Rect { left: 60; right: 0;  top: 20; bottom: 20}
+                layoutWidth: 180; layoutHeight: 20 }
+        Button { id: btnReset; text: "reset"; padding: 0; 
+		margins: Rect { left: 80; right: 0; top: 20; bottom: 20 }
+		layoutWidth: 200; layoutHeight: 20 }
+
+        Button { id: btnSave; text: "save"; padding: 0; 
+		margins: Rect { left: 80; right: 0; top: 20; bottom: 20 }
+		layoutWidth: 200; layoutHeight: 20 }
+    }
+};
+
+immutable string RESULT_WIDGET = `
+	MultilineTextWidget {
+	    /* this widget can be accessed via id myLabel1
+	        e.g. w.childById!TextWidget("myLabel1")
+	    */
+	    id: logTxtWidget
+	    text: ""
+	    padding: 5
+	    layoutWidth: FILL_PARENT
+	    layoutHeight: 100
+	    //readonly: true
+	}
+`;
+
+string cacheFile;
+
+class DMLSourceEdit : SourceEdit {
+    this(string ID) {
+        super(ID);
+
+        content.syntaxSupport = new DMLSyntaxSupport("");
+        setTokenHightlightColor(TokenCategory.Comment, 0x008000); // green
+        setTokenHightlightColor(TokenCategory.Keyword, 0x0000FF); // blue
+        setTokenHightlightColor(TokenCategory.String, 0xa31515);  // brown
+        setTokenHightlightColor(TokenCategory.Integer, 0xa315C0);  //
+        setTokenHightlightColor(TokenCategory.Float, 0xa315C0);  //
+        setTokenHightlightColor(TokenCategory.Error, 0xFF0000);  // red
+        setTokenHightlightColor(TokenCategory.Op, 0x503000);
+        setTokenHightlightColor(TokenCategory.Identifier_Class, 0x000080);  // blue
+
+    }
+    this() {
+        this("Dlearn");
+    }
+}
+
+
+class MainFrame : AppFrame {
+
+    MenuItem mainMenuItems;
+    AppSettings _settings;
+
+    override protected void initialize() {
+        _appName = "DLearn";
+        super.initialize();
+    }
+
+    this(Window window) {
+	//_settings = new AppSettings("_dlearnrc.json");
+	_settings = new AppSettings(buildNormalizedPath(settingsDir, "dlearnrc.json"));
+	//Log.d("_dlearnrc = " ~ buildNormalizedPath(settingsDir, "_dlearnrc.json"));
+	cacheFile = buildNormalizedPath(settingsDir, "dlearn_ini.d");
+        applySettings(_settings);
+
+        super();
+    }
+
+    ~this() {
+    //    if (_dcdInterface) {
+    //        destroy(_dcdInterface);
+    //        _dcdInterface = null;
+    //    }
+    }
+
+    /// create main menu
+    override protected MainMenu createMainMenu() {
+        mainMenuItems = new MenuItem();
+
+        MenuItem aboutMenu = new MenuItem(new Action(1, "MENU_ABOUT"));
+        aboutMenu.add(ACTION_ABOUT);
+        mainMenuItems.add(aboutMenu);
+
+        MenuItem langMenu = new MenuItem(new Action(2, "MENU_LANG"));
+        langMenu.add(ACTION_LANG);
+        mainMenuItems.add(langMenu);
+
+        MainMenu mainMenu = new MainMenu(mainMenuItems);
+
+        return mainMenu;
+    }
+
+    void applySettings(AppSettings settings) {
+        Platform.instance.uiLanguage = settings.uiLanguage;
+	//Log.d("settings.uiLanguage=");
+	//Log.d(settings.uiLanguage);
+        //Platform.instance.uiLanguage = "cn";
+        requestLayout();
+    }
+
+    override bool handleAction(const Action a) {
+        if (!a) {
+	    return false;
+	}
+        switch (a.id) {
+	    case IDEActions.About:
+		window.showMessageBox(UIString.fromId("ABOUT"), UIString.fromId("ABOUT_TEXT"));
+                return true;
+	    case IDEActions.Lang:
+		showPreferences();
+                return true;
+	    default:
+		return super.handleAction(a);
+	}
+	//return false;
+    }
+
+    override protected ToolBarHost createToolbars() {
+        ToolBarHost res = new ToolBarHost();
+        ToolBar tb;
+        tb = res.getOrAddToolbar("About");
+        tb.addButtons(ACTION_ABOUT);
+
+        tb = res.getOrAddToolbar("Lang");
+        tb.addButtons(ACTION_LANG);
+
+        return res;
+    }
+
+    string _filename;
+    void openSourceFile(string filename) {
+        import std.file;
+        // TODO
+        if (exists(filename)) {
+            _filename = filename;
+            window.windowCaption = toUTF32(filename);
+            _editor.load(filename);
+        }
+    }
+
+    void saveSourceFile(string filename) {
+        if (filename.length == 0)
+            filename = _filename;
+        import std.file;
+        _filename = filename;
+        window.windowCaption = toUTF32(filename);
+        _editor.save(filename);
+    }
+
+    bool onCanClose() {
+        // todo
+        return true;
+    }
+
+    void showPreferences() {
+        Setting s = _settings.copySettings();
+        SettingsDialog dlg = new SettingsDialog(UIString.fromId("HEADER_SETTINGS"), window, s, createSettingsPages());
+        dlg.dialogResult = delegate(Dialog dlg, const Action result) {
+            if (result.id == ACTION_APPLY.id) {
+                _settings.applySettings(s);
+                applySettings(_settings);
+                _settings.save();
+            }
+        };
+        dlg.show();
+    }
+
+    protected DMLSourceEdit _editor;
+    // protected ScrollWidget _preview;
+
+    void setText(Widget w, string text) {
+	w.text(toUTF32(text.replace("\r\n", "\n")));
+    }
+
+    override protected Widget createBody() {
+        auto dockHost = new DockHost();
+        dockHost.layoutWidth = FILL_PARENT;
+        dockHost.layoutHeight = FILL_PARENT;
+        dockHost.alignment = Align.Top;
+
+	auto ml = parseML(RESULT_WIDGET);
+	auto topFrame = parseML(BUTTONS_CODE);
+
+        _editor = new DMLSourceEdit();
+        _editor.text = getCacheText();
+        _editor.layoutHeight = 200;
+
+        auto resultDockWin = new DockWindow("result"); // false: don't show close button
+        resultDockWin.bodyWidget = ml;
+        resultDockWin.dockAlignment = DockAlignment.Bottom;
+        resultDockWin.layoutHeight = makePercentSize(40);
+        resultDockWin.layoutWidth = FILL_PARENT;
+	resultDockWin.caption.text = UIString.fromId("RESULT") ~ ":";
+
+        auto topDockWin = new DockWindow("top");
+        topDockWin.bodyWidget = topFrame;
+        topDockWin.dockAlignment = DockAlignment.Top;
+        topDockWin.layoutHeight = makePercentSize(10);
+        topDockWin.layoutWidth = FILL_PARENT;
+	topDockWin.caption.text = UIString.fromId("BUTTONS") ~ ":";
+
+        dockHost.addDockedWindow(topDockWin);
+        dockHost.bodyWidget = _editor;
+        dockHost.addDockedWindow(resultDockWin);
+
+	auto logTxtWidget = ml.childById!TextWidget("logTxtWidget");
+
+        auto btnSave = topFrame.childById!Button("btnSave");
+        btnSave.text = UIString.fromId("SAVE");
+	btnSave.click = delegate(Widget srcWidget) {
+	    auto fp = new File(cacheFile, "w");
+	    fp.write(_editor.text);
+	    setText(logTxtWidget, "Saved: " ~ cacheFile);
+	    return true;
+	};
+
+        auto btnRun = topFrame.childById!Button("btnRun");
+        btnRun.text = UIString.fromId("COMPILE_AND_RUN");
+
+	btnRun.click = delegate(Widget srcWidget) {
+	    auto tmpDir = std.file.tempDir();
+	    auto tmp_filename = buildPath(tmpDir, "aa.d");
+
+	    this.saveSourceFile(tmp_filename);
+
+	    auto tmp_exeFile = tmp_filename ~ ".exe";
+
+	    logTxtWidget.text = " ";
+
+	    try {
+	        auto result0 = execute(["dmd", tmp_filename, "-of=" ~ tmp_exeFile],
+			null, Config.suppressConsole);
+
+	        setText(logTxtWidget, result0.output);
+
+	        Log.i("dmd result: ", result0.output);
+	        if (result0.status != 0) {
+	            return false;
+	        }
+	    } catch (Exception e) {
+	        setText(logTxtWidget, "编译出错：" ~ e.toString());
+	        return false;
+	    }
+
+
+	    if (exists(tmp_exeFile)) {
+	        try {
+	            auto result1 = execute([tmp_exeFile], null, Config.suppressConsole);
+	            setText(logTxtWidget, "\n\n" ~ result1.output);
+	            if (result1.status != 0) {
+	        	return false;
+	            }
+	        } catch (Exception e) {
+	            setText(logTxtWidget, UIString.fromId("ERROR").to!string ~ "：" ~ e.toString());
+	            return false;
+	        }
+	    }
+
+	    return true;
+	};
+
+        auto btnReset = topFrame.childById!Button("btnReset");
+        btnReset.text = UIString.fromId("RESET");
+
+	btnReset.click = delegate(Widget srcWidget) {
+	    _editor.text = getCacheText();
+	    return true;
+	};
+
+	return dockHost;
+    }
+}
+
+dstring getCacheText() {
+    if (exists(cacheFile)) {
+	return readText(cacheFile).to!dstring;
+    } else {
+	return SAMPLE_SOURCE_CODE;
+    }
+}
+
+extern (C) int UIAppMain(string[] args) {
+    embeddedResourceList.addResources(embedResourcesFromList!("resources.list")());
+    FontManager.fontGamma = 0.8;
+    FontManager.hintingMode = HintingMode.Normal;
+
+    //cacheFile = buildNormalizedPath(settingsDir, "dlearn_ini.d");
+    //cacheFile = buildPath(dirName(thisExePath), "dlearn_ini.d");
+
+    // _settings = new AppSettings("settings.json");
+    // Platform.instance.uiLanguage = settings.uiLanguage;
+
+    Window window = Platform.instance.createWindow("Dlang Learn"d, null, 
+			WindowFlag.Resizable, 500, 500);
+
+    window.windowIcon = drawableCache.getImage("dlangui-logo1");
+    window.mainWidget = new MainFrame(window);
+
+    window.show();
+    return Platform.instance.enterMessageLoop();
+}
diff --git a/examples/dlearn/dlearn_ini.d b/examples/dlearn/dlearn_ini.d
new file mode 100644
index 00000000..668eb55b
--- /dev/null
+++ b/examples/dlearn/dlearn_ini.d
@@ -0,0 +1,16 @@
+import std.stdio;
+import std.path;
+import std.file;
+import std.string;
+import std.algorithm;
+import std.array;
+import std.conv;
+import std.typecons;
+

+int main() {
+    
+    int x = 3;
+    
+    writeln("Ok! ", x);
+    return 0;
+}
diff --git a/examples/dlearn/dub.json b/examples/dlearn/dub.json
new file mode 100644
index 00000000..e96b58ad
--- /dev/null
+++ b/examples/dlearn/dub.json
@@ -0,0 +1,31 @@
+{
+	"name": "dlearn",
+	"authors": [
+		"John Xu"
+	],
+	"dependencies": {
+		"dlangui": "~>0.10.2"
+	},
+	"description": "Test Dlang",
+	"homepage": "https://...",
+	"license": "Boost",
+	"stringImportPaths": [
+		"views",
+		"views/res",
+		"views/res/i18n",
+		"views/res/mdpi"
+	],
+	"subConfigurations": {
+		"dlangui": "minimal"
+	},
+
+	"targetName": "dlearn",
+	"targetPath": ".",
+	"targetType": "executable",
+        "mainSourceFile": "dlearn.d",
+        "sourceFiles": ["appSettings.d", "settings.d"],
+
+	"versions": [
+		"EmbedStandardResources"
+	]
+}
diff --git a/examples/dlearn/settings.d b/examples/dlearn/settings.d
new file mode 100644
index 00000000..4c92aa75
--- /dev/null
+++ b/examples/dlearn/settings.d
@@ -0,0 +1,25 @@
+import dlangui.core.settings;
+import dlangui.core.i18n;
+import dlangui.widgets.lists;
+import dlangui.dialogs.settingsdialog;
+
+StringListValue[] createIntValueList(int[] values, dstring suffix = ""d) {
+    import std.conv : to;
+    StringListValue[] res;
+    res.assumeSafeAppend();
+    foreach(n; values) {
+        res ~= StringListValue(n, to!dstring(n) ~ suffix);
+    }
+    return res;
+}
+
+SettingsPage createSettingsPages() {
+    import std.conv : to;
+    SettingsPage res = new SettingsPage("", UIString.fromRaw(""d));
+
+    SettingsPage ui = res.addChild("interface", UIString.fromId("OPTION_INTERFACE"c));
+    ui.addStringComboBox("interface/language", UIString.fromId("OPTION_LANGUAGE"c), [
+            StringListValue("en", "MENU_VIEW_LANGUAGE_EN"c), 
+	    StringListValue("cn", "MENU_VIEW_LANGUAGE_CN"c)]);
+    return res;
+}
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diff --git a/examples/dlearn/views/res/hdpi/edit-redo.png b/examples/dlearn/views/res/hdpi/edit-redo.png
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index 00000000..d759f136
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diff --git a/examples/dlearn/views/res/hdpi/edit-undo.png b/examples/dlearn/views/res/hdpi/edit-undo.png
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index 00000000..c893a1a6
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diff --git a/examples/dlearn/views/res/i18n/cn.ini b/examples/dlearn/views/res/i18n/cn.ini
new file mode 100644
index 00000000..4f4f1956
--- /dev/null
+++ b/examples/dlearn/views/res/i18n/cn.ini
@@ -0,0 +1,17 @@
+
+COMPILE_AND_RUN=编译并运行
+RESET=重置
+BUTTONS=按纽
+RESULT=结果
+SAVE=保存
+
+MENU_ABOUT = 关于
+MENU_LANG = 语言
+
+OPTION_INTERFACE=语言
+OPTION_LANGUAGE=语言
+MENU_VIEW_LANGUAGE_CN=中文
+MENU_VIEW_LANGUAGE_EN=English
+HEADER_SETTINGS=配置
+ABOUT=关于
+ABOUT_TEXT=DTst 版本 0.0.1. GNU免费/开源.
diff --git a/examples/dlearn/views/res/i18n/en.ini b/examples/dlearn/views/res/i18n/en.ini
new file mode 100644
index 00000000..3f2e3740
--- /dev/null
+++ b/examples/dlearn/views/res/i18n/en.ini
@@ -0,0 +1,16 @@
+
+COMPILE_AND_RUN=Compile and Run
+RESET=Reset
+BUTTONS= Button
+RESULT= Result
+SAVE= Save
+MENU_ABOUT=&About
+MENU_LANG=&Language
+
+OPTION_INTERFACE=Language
+OPTION_LANGUAGE=Language
+MENU_VIEW_LANGUAGE_CN=中文
+MENU_VIEW_LANGUAGE_EN=English
+HEADER_SETTINGS=Settings
+ABOUT=About
+ABOUT_TEXT=DLearn version 0.0.1. GNU Free / Open Source.
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diff --git a/examples/dlearn/views/res/mdpi/edit-redo.png b/examples/dlearn/views/res/mdpi/edit-redo.png
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diff --git a/examples/dlearn/views/res/mdpi/edit-undo.png b/examples/dlearn/views/res/mdpi/edit-undo.png
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diff --git a/examples/dlearn/views/res/mdpi/edit-unindent.png b/examples/dlearn/views/res/mdpi/edit-unindent.png
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diff --git a/examples/dlearn/views/res/mdpi/text-dml.png b/examples/dlearn/views/res/mdpi/text-dml.png
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diff --git a/examples/dlearn/views/res/mdpi/tx_fabric.jpg b/examples/dlearn/views/res/mdpi/tx_fabric.jpg
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diff --git a/examples/dlearn/views/resources.list b/examples/dlearn/views/resources.list
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--- /dev/null
+++ b/examples/dlearn/views/resources.list
@@ -0,0 +1,21 @@
+res/i18n/en.ini
+res/i18n/cn.ini
+
+res/mdpi/cr3_logo.png
+res/mdpi/debug-run.png
+res/mdpi/document-close.png
+res/mdpi/document-new.png
+res/mdpi/document-open-recent.png
+res/mdpi/document-open.png
+res/mdpi/document-properties.png
+res/mdpi/document-save-as.png
+res/mdpi/document-save.png
+res/mdpi/edit-copy.png
+res/mdpi/edit-cut.png
+res/mdpi/edit-indent.png
+res/mdpi/edit-paste.png
+res/mdpi/edit-redo.png
+res/mdpi/edit-undo.png
+res/mdpi/edit-unindent.png
+res/mdpi/text-dml.png
+res/mdpi/tx_fabric.jpg