implement CheckBox and RadioButton controls

.gitignore

@@ -1,5 +1,10 @@
 Debug
 Release
+Unittest
 ui.log
 obj
-
+*.suo
+Thumbs.db
+.dub
+bin
+*.obj

README.md

@@ -65,6 +65,7 @@ Hello World
 	    // setup resource directories - will use only existing directories
 	    drawableCache.setResourcePaths(resourceDirs);
 
+            // optinally setup internatilnalization (if used)
 	    // setup i18n - look for i18n directory inside one of passed directories
 	    i18n.findTranslationsDir(resourceDirs);
 	    // select translation file - for english language
@@ -72,7 +73,10 @@ Hello World
 	
 	    // create window
 	    Window window = Platform.instance.createWindow("My Window", null);
+            // create some widget to show in window
 	    window.mainWidget = (new Button()).text("Hello world"d);
+            // show window
+            window.show();
 	    // run message loop
 	    return Platform.instance.enterMessageLoop();
 	}

dlanguilib.visualdproj

@@ -54,12 +54,12 @@
   <objname />
   <libname />
   <doDocComments>0</doDocComments>
-  <docdir />
-  <docname />
+  <docdir>docs</docdir>
+  <docname>docs/index.html</docname>
   <modules_ddoc />
   <ddocfiles />
   <doHdrGeneration>0</doHdrGeneration>
-  <hdrdir />
+  <hdrdir>include</hdrdir>
   <hdrname />
   <doXGeneration>1</doXGeneration>
   <xfilename>$(IntDir)\$(TargetName).json</xfilename>

examples/example1/src/main.d

@@ -12,8 +12,10 @@ extern (C) int UIAppMain(string[] args) {
     // resource directory search paths
     string[] resourceDirs = [
         appendPath(exePath, "../../../res/"),   // for Visual D and DUB builds
+        appendPath(exePath, "../../../res/mdpi/"),   // for Visual D and DUB builds
         appendPath(exePath, "../../../../res/"),// for Mono-D builds
-        appendPath(exePath, "res/") // when res dir is located at the same directory as executable
+        appendPath(exePath, "../../../../res/mdpi/"),// for Mono-D builds
+        appendPath(exePath, "res/mdpi/") // when res dir is located at the same directory as executable
     ];
     // setup resource directories - will use only existing directories
     drawableCache.setResourcePaths(resourceDirs);
@@ -70,9 +72,9 @@ extern (C) int UIAppMain(string[] args) {
 	    LinearLayout hlayout = new HorizontalLayout();
 		//hlayout.addChild((new Button()).text("<<")); //.textColor(0x40FF4000)
 	    hlayout.addChild((new TextWidget()).text("Several").alignment(Align.Center));
-		hlayout.addChild((new ImageWidget()).drawableId("exit").padding(Rect(5,5,5,5)).alignment(Align.Center));
+		hlayout.addChild((new ImageWidget()).drawableId("btn_radio").padding(Rect(5,5,5,5)).alignment(Align.Center));
 	    hlayout.addChild((new TextWidget()).text("items").alignment(Align.Center));
-		hlayout.addChild((new ImageWidget()).drawableId("exit").padding(Rect(5,5,5,5)).alignment(Align.Center));
+		hlayout.addChild((new ImageWidget()).drawableId("btn_check").padding(Rect(5,5,5,5)).alignment(Align.Center));
 	    hlayout.addChild((new TextWidget()).text("in horizontal layout"));
 		hlayout.addChild((new ImageWidget()).drawableId("exit").padding(Rect(5,5,5,5)).alignment(Align.Center));
 		//hlayout.addChild((new Button()).text(">>")); //.textColor(0x40FF4000)
@@ -84,6 +86,9 @@ extern (C) int UIAppMain(string[] args) {
 		vlayout.addChild((new TextWidget()).text("VLayout line 1").textColor(0x40FF4000)); //
 	    vlayout.addChild((new TextWidget()).text("VLayout line 2").textColor(0x40FF8000));
 	    vlayout.addChild((new TextWidget()).text("VLayout line 2").textColor(0x40008000));
+	    vlayout.addChild(new RadioButton("rb1", "Radio button 1"d));
+	    vlayout.addChild(new RadioButton("rb2", "Radio button 2"d));
+	    vlayout.addChild(new RadioButton("rb3", "Radio button 3"d));
         vlayout.layoutWidth(FILL_PARENT);
 	    vlayoutgroup.addChild(vlayout);
         vlayoutgroup.layoutWidth(FILL_PARENT);
@@ -94,12 +99,13 @@ extern (C) int UIAppMain(string[] args) {
         ScrollBar sb = new ScrollBar("hscroll", Orientation.Horizontal);
         layout.addChild(sb.layoutHeight(WRAP_CONTENT).layoutWidth(FILL_PARENT));
 
-		layout.addChild((new Button("BTN2")).textColor(0x000000FF).text("Button2"));
+		layout.addChild((new CheckBox("BTN2", "Some checkbox"d)));
 		layout.addChild((new TextWidget()).textColor(0x40FF4000).text("Text widget"));
 		layout.addChild((new ImageWidget()).drawableId("exit").padding(Rect(5,5,5,5)));
 		layout.addChild((new TextWidget()).textColor(0xFF4000).text("Text widget2").padding(Rect(5,5,5,5)).margins(Rect(5,5,5,5)).backgroundColor(0xA0A0A0));
-		layout.addChild((new Button("BTN3")).textColor(0x000000FF).text("Button3").layoutHeight(FILL_PARENT));
-		layout.addChild((new TextWidget()).textColor(0x004000).text("Text widget3 with very long text"));
+		layout.addChild((new RadioButton("BTN3", "Some radio button"d)));
+		layout.addChild((new TextWidget(null, "Text widget3 with very long text"d)).textColor(0x004000));
+        layout.addChild(new VSpacer()); // vertical spacer to fill extra space
 
 		layout.childById("BTN1").onClickListener = (delegate (Widget w) { Log.d("onClick ", w.id); return true; });
 		layout.childById("BTN2").onClickListener = (delegate (Widget w) { Log.d("onClick ", w.id); return true; });

examples/helloworld/src/app.d

@@ -25,10 +25,12 @@ extern (C) int UIAppMain(string[] args) {
     // create window
     Window window = Platform.instance.createWindow("My Window", null);
 	
-    window.mainWidget = (new Button()).text("sample button");
+    // create some widget to show in window
+    window.mainWidget = (new Button()).text("Hello world"d);
 
+    // show window
     window.show();
-    //window.windowCaption = "New Window Caption";
+
     // run message loop
     return Platform.instance.enterMessageLoop();
 }

res/btn_check.xml

@@ -0,0 +1,65 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright (C) 2011 The Android Open Source Project
+
+     Licensed under the Apache License, Version 2.0 (the "License");
+     you may not use this file except in compliance with the License.
+     You may obtain a copy of the License at
+
+          http://www.apache.org/licenses/LICENSE-2.0
+
+     Unless required by applicable law or agreed to in writing, software
+     distributed under the License is distributed on an "AS IS" BASIS,
+     WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+     See the License for the specific language governing permissions and
+     limitations under the License.
+-->
+
+<selector xmlns:android="http://schemas.android.com/apk/res/android">
+
+    <!-- Enabled states -->
+        
+    <item android:state_checked="true" android:state_window_focused="false"
+          android:state_enabled="true"
+          android:drawable="@drawable/btn_check_on_holo_light" />
+    <item android:state_checked="false" android:state_window_focused="false"
+          android:state_enabled="true"
+          android:drawable="@drawable/btn_check_off_holo_light" />
+
+    <item android:state_checked="true" android:state_pressed="true"
+          android:state_enabled="true"
+          android:drawable="@drawable/btn_check_on_pressed_holo_light" />
+    <item android:state_checked="false" android:state_pressed="true"
+          android:state_enabled="true"
+          android:drawable="@drawable/btn_check_off_pressed_holo_light" />
+
+    <item android:state_checked="true" android:state_focused="true"
+          android:state_enabled="true"
+          android:drawable="@drawable/btn_check_on_focused_holo_light" />
+    <item android:state_checked="false" android:state_focused="true"
+          android:state_enabled="true"
+          android:drawable="@drawable/btn_check_off_focused_holo_light" />
+
+    <item android:state_checked="false"
+          android:state_enabled="true"
+          android:drawable="@drawable/btn_check_off_holo_light" />
+    <item android:state_checked="true"
+          android:state_enabled="true"
+          android:drawable="@drawable/btn_check_on_holo_light" />
+
+
+    <!-- Disabled states -->
+
+    <item android:state_checked="true" android:state_window_focused="false"
+          android:drawable="@drawable/btn_check_on_disabled_holo_light" />
+    <item android:state_checked="false" android:state_window_focused="false"
+          android:drawable="@drawable/btn_check_off_disabled_holo_light" />
+
+    <item android:state_checked="true" android:state_focused="true"
+          android:drawable="@drawable/btn_check_on_disabled_focused_holo_light" />
+    <item android:state_checked="false" android:state_focused="true"
+          android:drawable="@drawable/btn_check_off_disabled_focused_holo_light" />
+
+    <item android:state_checked="false" android:drawable="@drawable/btn_check_off_disabled_holo_light" />
+    <item android:state_checked="true" android:drawable="@drawable/btn_check_on_disabled_holo_light" />
+
+</selector>

res/btn_radio.xml

@@ -0,0 +1,59 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright (C) 2011 The Android Open Source Project
+
+     Licensed under the Apache License, Version 2.0 (the "License");
+     you may not use this file except in compliance with the License.
+     You may obtain a copy of the License at
+
+          http://www.apache.org/licenses/LICENSE-2.0
+
+     Unless required by applicable law or agreed to in writing, software
+     distributed under the License is distributed on an "AS IS" BASIS,
+     WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+     See the License for the specific language governing permissions and
+     limitations under the License.
+-->
+
+<selector xmlns:android="http://schemas.android.com/apk/res/android">
+    <item android:state_checked="true" android:state_window_focused="false"
+          android:state_enabled="true"
+          android:drawable="@drawable/btn_radio_on_holo_light" />
+    <item android:state_checked="false" android:state_window_focused="false"
+          android:state_enabled="true"
+          android:drawable="@drawable/btn_radio_off_holo_light" />
+          
+    <item android:state_checked="true" android:state_pressed="true"
+          android:state_enabled="true"
+          android:drawable="@drawable/btn_radio_on_pressed_holo_light" />
+    <item android:state_checked="false" android:state_pressed="true"
+          android:state_enabled="true"
+          android:drawable="@drawable/btn_radio_off_pressed_holo_light" />
+
+    <item android:state_checked="true" android:state_focused="true"
+          android:state_enabled="true"
+          android:drawable="@drawable/btn_radio_on_focused_holo_light" />
+    <item android:state_checked="false" android:state_focused="true"
+          android:state_enabled="true"
+          android:drawable="@drawable/btn_radio_off_focused_holo_light" />
+
+    <item android:state_checked="false" android:state_enabled="true"
+          android:drawable="@drawable/btn_radio_off_holo_light" />
+    <item android:state_checked="true" android:state_enabled="true"
+          android:drawable="@drawable/btn_radio_on_holo_light" />
+
+    <!-- Disabled states -->
+
+    <item android:state_checked="true" android:state_window_focused="false"
+          android:drawable="@drawable/btn_radio_on_disabled_holo_light" />
+    <item android:state_checked="false" android:state_window_focused="false"
+          android:drawable="@drawable/btn_radio_off_disabled_holo_light" />
+
+    <item android:state_checked="true" android:state_focused="true"
+          android:drawable="@drawable/btn_radio_on_disabled_focused_holo_light" />
+    <item android:state_checked="false" android:state_focused="true"
+          android:drawable="@drawable/btn_radio_off_disabled_focused_holo_light" />
+
+    <item android:state_checked="false" android:drawable="@drawable/btn_radio_off_disabled_holo_light" />
+    <item android:state_checked="true" android:drawable="@drawable/btn_radio_on_disabled_holo_light" />
+
+</selector>

res/btn_radio_background.xml

@@ -0,0 +1,11 @@
+<?xml version="1.0" encoding="utf-8"?>
+<selector xmlns:android="http://schemas.android.com/apk/res/android" >
+  <item
+    android:drawable="main_menu_item_background_selected"
+    android:state_selected="true" />
+  <item
+    android:drawable="main_menu_item_background_hover"
+    android:state_hovered="true" />
+  <item
+    android:drawable="@null" />
+</selector>

src/dlangui/all.d

@@ -21,8 +21,10 @@ extern (C) int UIAppMain(string[] args) {
         appendPath(exePath, "../../../../res/"), // for Mono-D builds
         appendPath(exePath, "res/") // when res dir is located at the same directory as executable
     ];
+
     // setup resource directories - will use only existing directories
     drawableCache.setResourcePaths(resourceDirs);
+
     // setup i18n - look for i18n directory inside one of passed directories
     i18n.findTranslationsDir(resourceDirs);
     // select translation file - for english language
@@ -30,7 +32,10 @@ extern (C) int UIAppMain(string[] args) {
 
     // create window
     Window window = Platform.instance.createWindow("My Window", null);
+    // create some widget to show in window
     window.mainWidget = (new Button()).text("Hello world"d);
+    // show window
+    window.show();
     // run message loop
     return Platform.instance.enterMessageLoop();
 }

src/dlangui/graphics/resources.d

@@ -351,6 +351,8 @@ class StateDrawable : Drawable {
         foreach(item; element.elements) {
             if (item.tag.name.equal("item")) {
                 string drawableId = attrValue(item, "drawable", "android:drawable");
+                if (drawableId.startsWith("@drawable/"))
+                    drawableId = drawableId[10 .. $];
                 ColorTransform transform;
                 transform.addBefore = colorTransformFromStringAdd(attrValue(item, "color_transform_add1", "android:transform_color_add1"));
                 transform.multiply = colorTransformFromStringMult(attrValue(item, "color_transform_mul", "android:transform_color_mul"));
@@ -394,8 +396,12 @@ class StateDrawable : Drawable {
     override void drawTo(DrawBuf buf, Rect rc, uint state = 0, int tilex0 = 0, int tiley0 = 0) {
         foreach(ref item; _stateList)
             if (item.matchState(state)) {
-                if (!item.drawable.isNull)
+                if (!item.drawable.isNull) {
+                    if (state & State.Checked) {
+                        Log.d("Found item for checked state: ", item.stateMask, " ", item.stateValue);
+                    }
                     item.drawable.drawTo(buf, rc, state, tilex0, tiley0);
+                }
                 return;
             }
     }
@@ -620,24 +626,28 @@ class DrawableCache {
                 return _drawable;
             if (_filename !is null) {
                 // reload from file
-                if (_filename.endsWith(".xml")) {
+                if (_filename.endsWith(".xml") || _filename.endsWith(".XML")) {
                     // XML drawables support
                     StateDrawable d = new StateDrawable();
                     if (!d.load(_filename)) {
+                        Log.e("failed to load .xml drawable from ", _filename);
                         destroy(d);
                         _error = true;
                     } else {
+                        Log.d("loaded .xml drawable from ", _filename);
                         _drawable = d;
                     }
                 } else {
                     // PNG/JPEG drawables support
                     DrawBufRef image = imageCache.get(_filename, transform);
                     if (!image.isNull) {
-                        bool ninePatch = _filename.endsWith(".9.png");
+                        bool ninePatch = _filename.endsWith(".9.png") ||  _filename.endsWith(".9.PNG");
                         _transformed[transform] = new ImageDrawable(image, _tiled, ninePatch);
                         return _transformed[transform];
-                    } else
+                    } else {
+                        Log.e("failed to load image from ", _filename);
                         _error = true;
+                    }
                 }
             }
             return _drawable;
@@ -743,6 +753,8 @@ class DrawableCache {
             if (fn !is null) {
                 _idToFileMap[id] = fn;
                 return fn;
+            } else {
+                Log.w("resource ", id, " is not found");
             }
         }
         return null;

src/dlangui/platforms/windows/win32fonts.d

@@ -286,9 +286,11 @@ class Win32Font : Font {
 		lf.lfFaceName[def.face.length] = 0;
 		lf.lfHeight = -size;
 		lf.lfItalic = italic;
-		lf.lfOutPrecision = OUT_TT_ONLY_PRECIS;
+		lf.lfOutPrecision = OUT_OUTLINE_PRECIS; //OUT_TT_ONLY_PRECIS;
 		lf.lfClipPrecision = CLIP_DEFAULT_PRECIS;
-		lf.lfQuality = ANTIALIASED_QUALITY;
+		//lf.lfQuality = NONANTIALIASED_QUALITY; //ANTIALIASED_QUALITY;
+		//lf.lfQuality = PROOF_QUALITY; //ANTIALIASED_QUALITY;
+		lf.lfQuality = size < 18 ? NONANTIALIASED_QUALITY : PROOF_QUALITY; //ANTIALIASED_QUALITY;
 		lf.lfPitchAndFamily = def.pitchAndFamily;
         _hfont = CreateFontIndirectA(&lf);
         _drawbuf = new Win32ColorDrawBuf(1, 1);

src/dlangui/widgets/controls.d

@@ -30,14 +30,33 @@ Authors:   $(WEB coolreader.org, Vadim Lopatin)
 module dlangui.widgets.controls;
 
 import dlangui.widgets.widget;
+import dlangui.widgets.layouts;
 
+/// vertical spacer to fill empty space in vertical layouts
+class VSpacer : Widget {
+    this() {
+        styleId = "VSpacer";
+    }
+}
 
+/// horizontal spacer to fill empty space in horizontal layouts
+class HSpacer : Widget {
+    this() {
+        styleId = "HSpacer";
+    }
+}
 
 /// static text widget
 class TextWidget : Widget {
-    this(string ID = null) {
+    this(string ID = null, string textResourceId = null) {
 		super(ID);
         styleId = "TEXT";
+        _text = textResourceId;
+    }
+    this(string ID, dstring rawText) {
+		super(ID);
+        styleId = "TEXT";
+        _text = rawText;
     }
     protected UIString _text;
     /// get widget text
@@ -49,7 +68,7 @@ class TextWidget : Widget {
 		return this;
     }
     /// set text to show
-    @property Widget text(ref UIString s) { 
+    override @property Widget text(ref UIString s) { 
         _text = s; 
         requestLayout();
 		return this;
@@ -152,7 +171,11 @@ class ImageWidget : Widget {
             sz.x = img.width;
             sz.y = img.height;
             applyAlign(rc, sz);
-            img.drawTo(buf, rc, state);
+            uint st = state;
+            if (state & State.Checked) {
+                Log.d("Drawing image for checked state");
+            }
+            img.drawTo(buf, rc, st);
         }
     }
 }
@@ -160,18 +183,98 @@ class ImageWidget : Widget {
 /// button with image only
 class ImageButton : ImageWidget {
     this(string ID = null, string drawableId = null) {
-        super(ID);
+        super(ID, drawableId);
         styleId = "BUTTON";
         _drawableId = drawableId;
+        clickable = true;
         focusable = true;
         trackHover = true;
     }
 }
 
+/// button with image and text
+class ImageTextButton : HorizontalLayout {
+    protected ImageWidget _icon;
+    protected TextWidget _label;
+    override @property dstring text() { return _label.text; }
+    override @property Widget text(dstring s) { _label.text = s; requestLayout(); return this; }
+    override @property Widget text(ref UIString s) { _label.text = s; requestLayout(); return this; }
+    this(string ID = null, string drawableId = null, string textResourceId = null) {
+        super(ID);
+        styleId = "BUTTON";
+        _icon = new ImageWidget("icon", drawableId);
+        _label = new TextWidget("label", textResourceId);
+        _label.styleId = "BUTTON_LABEL";
+        _icon.state = State.Parent;
+        _label.state = State.Parent;
+        addChild(_icon);
+        addChild(_label);
+        clickable = true;
+        focusable = true;
+        trackHover = true;
+    }
+    this(string ID, string drawableId, dstring rawText) {
+        super(ID);
+        styleId = "BUTTON";
+        _icon = new ImageWidget("icon", drawableId);
+        _label = new TextWidget("label", rawText);
+        _label.styleId = "BUTTON_LABEL";
+        _icon.styleId = "BUTTON_ICON";
+        _icon.state = State.Parent;
+        _label.state = State.Parent;
+        addChild(_icon);
+        addChild(_label);
+        clickable = true;
+        focusable = true;
+        trackHover = true;
+    }
+}
+
+/// checkbox
+class CheckBox : ImageTextButton {
+    this(string ID = null, string textResourceId = null) {
+        super(ID, "btn_check", textResourceId);
+        styleId = "TRANSPARENT_BUTTON_BACKGROUND";
+        checkable = true;
+    }
+    this(string ID, dstring labelText) {
+        super(ID, "btn_check", labelText);
+        styleId = "TRANSPARENT_BUTTON_BACKGROUND";
+        checkable = true;
+    }
+    // called to process click and notify listeners
+    override protected bool handleClick() {
+        checked = !checked;
+        return super.handleClick();
+    }
+}
+
+/// radio button
+class RadioButton : ImageTextButton {
+    this(string ID = null, string textResourceId = null) {
+        super(ID, "btn_radio", textResourceId);
+        styleId = "TRANSPARENT_BUTTON_BACKGROUND";
+        checkable = true;
+    }
+    this(string ID, dstring labelText) {
+        super(ID, "btn_radio", labelText);
+        styleId = "TRANSPARENT_BUTTON_BACKGROUND";
+        checkable = true;
+    }
+    // called to process click and notify listeners
+    override protected bool handleClick() {
+        checked = true;
+        return super.handleClick();
+    }
+
+}
+
+/// Text only button
 class Button : Widget {
     protected UIString _text;
     override @property dstring text() { return _text; }
     override @property Widget text(dstring s) { _text = s; requestLayout(); return this; }
+    override @property Widget text(ref UIString s) { _text = s; requestLayout(); return this; }
     @property Widget textResource(string s) { _text = s; requestLayout(); return this; }
     this(string ID = null) {
 		super(ID);

src/dlangui/widgets/styles.d

@@ -523,10 +523,11 @@ class Theme : Style {
 		_backgroundColor = 0xFFFFFFFF; // transparent
 		_textColor = 0x000000; // black
 		_align = Align.TopLeft;
-		_fontSize = 24; // TODO: from settings or screen properties / DPI
+		_fontSize = 14; // TODO: from settings or screen properties / DPI
 		_fontStyle = FONT_STYLE_NORMAL;
 		_fontWeight = 400;
-		_fontFace = "Arial"; // TODO: from settings
+		//_fontFace = "Arial"; // TODO: from settings
+		_fontFace = "Verdana"; // TODO: from settings
         _fontFamily = FontFamily.SansSerif;
         _minHeight = 0;
         _minWidth = 0;
@@ -635,10 +636,18 @@ Theme createDefaultTheme() {
 	Log.d("Creating default theme");
 	Theme res = new Theme("default");
     //res.fontSize(14);
-    res.fontSize(24);
+    version (Windows) {
+        res.fontFace = "Verdana";
+    }
+    //res.fontFace = "Arial Narrow";
+    res.fontSize = 13; // TODO: choose based on DPI
     Style button = res.createSubstyle("BUTTON").backgroundImageId("btn_default_small").alignment(Align.Center);
-    Style buttonTransparent = res.createSubstyle("BUTTON_TRANSPARENT").backgroundImageId("btn_default_small_transparent").alignment(Align.Center);
-    Style text = res.createSubstyle("TEXT").margins(Rect(2,2,2,2)).padding(Rect(1,1,1,1));
+    res.createSubstyle("BUTTON_TRANSPARENT").backgroundImageId("btn_default_small_transparent").alignment(Align.Center);
+    res.createSubstyle("BUTTON_LABEL").layoutWidth(FILL_PARENT).alignment(Align.Left|Align.VCenter);
+    res.createSubstyle("BUTTON_ICON").alignment(Align.Center);
+    res.createSubstyle("TEXT").margins(Rect(2,2,2,2)).padding(Rect(1,1,1,1));
+    res.createSubstyle("HSPACER").layoutWidth(FILL_PARENT).layoutWeight(100);
+    res.createSubstyle("VSPACER").layoutHeight(FILL_PARENT).layoutWeight(100);
     //button.createState(State.Enabled | State.Focused, State.Focused).backgroundImageId("btn_default_small_normal_disable_focused");
     //button.createState(State.Enabled, 0).backgroundImageId("btn_default_small_normal_disable");
     //button.createState(State.Pressed, State.Pressed).backgroundImageId("btn_default_small_pressed");
@@ -692,6 +701,12 @@ Theme createDefaultTheme() {
     menuItem.createState(State.Selected, State.Selected).backgroundColor(0x00F8F9Fa);
     menuItem.createState(State.Hovered, State.Hovered).backgroundColor(0xC0FFFF00);
 
+    Style transparentButtonBackground = res.createSubstyle("TRANSPARENT_BUTTON_BACKGROUND").padding(Rect(4,2,4,2)); //.backgroundColor(0xE0E080)   ;
+    transparentButtonBackground.createState(State.Focused, State.Focused).backgroundColor(0x40C0C000);
+    transparentButtonBackground.createState(State.Pressed, State.Pressed).backgroundColor(0x4080C000);
+    transparentButtonBackground.createState(State.Selected, State.Selected).backgroundColor(0x00F8F9Fa);
+    transparentButtonBackground.createState(State.Hovered, State.Hovered).backgroundColor(0xC0FFFF00);
+
     Style poopupMenu = res.createSubstyle("POPUP_MENU").backgroundImageId("popup_menu_background_normal");
 
     Style listItem = res.createSubstyle("LIST_ITEM");

src/dlangui/widgets/widget.d

@@ -259,6 +259,8 @@ class Widget {
     @property dstring text() { return ""; }
     /// sets widget content text (override to support this)
     @property Widget text(dstring s) { return this; }
+    /// sets widget content text (override to support this)
+    @property Widget text(ref UIString s) { return this; }
 
     //==================================================================
     // Layout and drawing related methods
@@ -337,12 +339,39 @@ class Widget {
         return _pos.isPointInside(x, y);
     }
 
+    protected bool _clickable;
+    @property bool clickable() { return _clickable; }
+    @property Widget clickable(bool flg) { _clickable = flg; return this; }
+
+    protected bool _checkable;
+    @property bool checkable() { return _checkable; }
+    @property Widget checkable(bool flg) { _checkable = flg; return this; }
+
+    protected bool _checked;
+    /// get checked state
+    @property bool checked() { return (state & State.Checked) != 0; }
+    /// set checked state
+    @property Widget checked(bool flg) { 
+        if (flg != checked) {
+            if (flg) 
+                setState(State.Checked); 
+            else 
+                resetState(State.Checked); 
+            invalidate(); 
+        }
+        return this; 
+    }
+
     protected bool _focusable;
     @property bool focusable() { return _focusable; }
     @property Widget focusable(bool flg) { _focusable = flg; return this; }
+
     @property bool focused() {
         return (window !is null && window.focusedWidget is this && (state & State.Focused));
     }
+
+
+
     /// returns true if this widget and all its parents are visible
     @property bool visible() {
         if (visibility != Visibility.Visible)
@@ -390,9 +419,15 @@ class Widget {
     // =======================================================
     // Events
 
+    // called to process click and notify listeners
+    protected bool handleClick() {
+        bool res = onClickListener(this);
+        return res;
+    }
+
     /// process key event, return true if event is processed.
     bool onKeyEvent(KeyEvent event) {
-		if (onClickListener.assigned) {
+		if (clickable) {
             // support onClick event initiated by Space or Return keys
             if (event.action == KeyAction.KeyDown) {
                 if (event.keyCode == KeyCode.SPACE || event.keyCode == KeyCode.RETURN) {
@@ -403,7 +438,7 @@ class Widget {
             if (event.action == KeyAction.KeyUp) {
                 if (event.keyCode == KeyCode.SPACE || event.keyCode == KeyCode.RETURN) {
                     resetState(State.Pressed);
-                    onClickListener(this);
+                    handleClick();
                     return true;
                 }
             }
@@ -415,7 +450,7 @@ class Widget {
     bool onMouseEvent(MouseEvent event) {
         //Log.d("onMouseEvent ", id, " ", event.action, "  (", event.x, ",", event.y, ")");
 		// support onClick
-		if (onClickListener.assigned) {
+		if (clickable) {
 	        if (event.action == MouseAction.ButtonDown && event.button == MouseButton.Left) {
 	            setState(State.Pressed);
                 if (focusable)
@@ -424,7 +459,7 @@ class Widget {
 	        }
 	        if (event.action == MouseAction.ButtonUp && event.button == MouseButton.Left) {
 	            resetState(State.Pressed);
-				onClickListener(this);
+                handleClick();
 	            return true;
 	        }
 	        if (event.action == MouseAction.FocusOut || event.action == MouseAction.Cancel) {