fix theme update; fix dark theme

src/dlangui/widgets/scrollbar.d

@@ -320,14 +320,24 @@ class ScrollBar : AbstractSlider, OnClickHandler {
     override @property AbstractSlider orientation(Orientation value) { 
         if (_orientation != value) {
             _orientation = value;
-            _btnBack.drawableId = style.customDrawableId(_orientation == Orientation.Vertical ? ATTR_SCROLLBAR_BUTTON_UP : ATTR_SCROLLBAR_BUTTON_LEFT);
+            updateDrawableIds();
-            _btnForward.drawableId = style.customDrawableId(_orientation == Orientation.Vertical ? ATTR_SCROLLBAR_BUTTON_DOWN : ATTR_SCROLLBAR_BUTTON_RIGHT);
-            _indicator.drawableId = style.customDrawableId(_orientation == Orientation.Vertical ? ATTR_SCROLLBAR_INDICATOR_VERTICAL : ATTR_SCROLLBAR_INDICATOR_HORIZONTAL);
             requestLayout();
         }
         return this; 
     }
 
+    void updateDrawableIds() {
+        _btnBack.drawableId = style.customDrawableId(_orientation == Orientation.Vertical ? ATTR_SCROLLBAR_BUTTON_UP : ATTR_SCROLLBAR_BUTTON_LEFT);
+        _btnForward.drawableId = style.customDrawableId(_orientation == Orientation.Vertical ? ATTR_SCROLLBAR_BUTTON_DOWN : ATTR_SCROLLBAR_BUTTON_RIGHT);
+        _indicator.drawableId = style.customDrawableId(_orientation == Orientation.Vertical ? ATTR_SCROLLBAR_INDICATOR_VERTICAL : ATTR_SCROLLBAR_INDICATOR_HORIZONTAL);
+    }
+
+    /// handle theme change: e.g. reload some themed resources
+    override void onThemeChanged() {
+        super.onThemeChanged();
+        updateDrawableIds();
+    }
+
     /// set string property value, for ML loaders
     override bool setStringProperty(string name, string value) {
         if (name.equal("orientation")) {

src/dlangui/widgets/styles.d

@@ -295,6 +295,13 @@ struct DrawableAttributeList {
             set(key, value.drawableId);
         }
     }
+    void onThemeChanged() {
+        foreach(key, ref value; _customDrawables) {
+            if (value) {
+                value.onThemeChanged();
+            }
+        }
+    }
 }
 
 /// style properties
@@ -348,7 +355,7 @@ public:
             s.onThemeChanged();
         foreach(s; _children)
             s.onThemeChanged();
-        _customDrawables.clear();
+        _customDrawables.onThemeChanged();
     }
 
     @property const(Theme) theme() const {
@@ -1663,6 +1670,12 @@ public:
         _drawable.clear();
         _initialized = false;
     }
+    void onThemeChanged() {
+        if (!_drawableId) {
+            _drawable.clear();
+            _initialized = false;
+        }
+    }
 }
 
 /// returns custom drawable replacement id for specified id from current theme, or returns passed value if not found or no current theme

views/res/scrollbar_btn_transparent_background_dark.xml

@@ -0,0 +1,14 @@
+<?xml version="1.0" encoding="utf-8"?>
+<selector xmlns:android="http://schemas.android.com/apk/res/android">
+    <item android:state_pressed="true" 
+        android:drawable="@drawable/scrollbar_btn_background_pressed_dark" />
+    <item android:state_focused="true" android:state_enabled="true"
+        android:drawable="@drawable/scrollbar_btn_background_normal_dark" />
+    <item android:state_enabled="true" android:state_hovered="true"
+        android:drawable="@drawable/scrollbar_btn_background_hover_dark" />
+    <item android:state_enabled="true"
+        android:drawable="@null" />
+    <item
+        android:drawable="@null" />
+</selector>
+

views/res/theme_dark.xml

@@ -77,21 +77,18 @@
     <style id="BUTTON_NOMARGINS"
         backgroundImageId="btn_background_dark"
         />
+    <drawable id="close" value="close_dark"/>
+    <drawable id="tab_more" value="tab_more_dark"/>
     <drawable id="btn_check" value="btn_check_dark"/>
     <drawable id="btn_radio" value="btn_radio_dark"/>
     <drawable id="arrow_right_down_black" value="arrow_right_down_black_dark"/>
     <drawable id="arrow_right_hollow" value="arrow_right_hollow_dark"/>
     <drawable id="toolbar_separator" value="toolbar_separator_dark"/>
 
-    <drawable id="scrollbar_button_up" value="scrollbar_btn_up"/>
+    <drawable id="scrollbar_button_up" value="scrollbar_btn_up_dark"/>
-    <drawable id="scrollbar_button_down" value="scrollbar_btn_down"/>
+    <drawable id="scrollbar_button_down" value="scrollbar_btn_down_dark"/>
-    <drawable id="scrollbar_button_left" value="scrollbar_btn_left"/>
+    <drawable id="scrollbar_button_left" value="scrollbar_btn_left_dark"/>
-    <drawable id="scrollbar_button_right" value="scrollbar_btn_right"/>
+    <drawable id="scrollbar_button_right" value="scrollbar_btn_right_dark"/>
-
-    <drawable id="scrollbar_btn_up" value="scrollbar_btn_up_dark"/>
-    <drawable id="scrollbar_btn_down" value="scrollbar_btn_down_dark"/>
-    <drawable id="scrollbar_btn_left" value="scrollbar_btn_left_dark"/>
-    <drawable id="scrollbar_btn_right" value="scrollbar_btn_right_dark"/>
 
     <drawable id="scrollbar_indicator_vertical" value="scrollbar_indicator_vertical"/>
     <drawable id="scrollbar_indicator_horizontal" value="scrollbar_indicator_horizontal"/>
@@ -103,6 +100,10 @@
         backgroundImageId="scrollbar_btn_background_dark"
         align="Center"
         />
+    <style id="SCROLLBAR_BUTTON_TRANSPARENT"
+        backgroundImageId="scrollbar_btn_transparent_background_dark"
+        align="Center"
+        />
     <style id="SLIDER"
         backgroundImageId="slider_background_dark"
         align="Center"

views/standard_resources.list

@@ -21,6 +21,7 @@ res/btn_radio_dark.xml
 res/btn_radio_background.xml
 res/btn_radio_background_dark.xml
 res/close.png
+res/close_dark.png
 res/combobox_background.xml
 res/combobox_background_dark.xml
 res/editbox_background.xml
@@ -284,6 +285,7 @@ res/scrollbar_btn_left_dark.png
 res/scrollbar_btn_right.png
 res/scrollbar_btn_right_dark.png
 res/scrollbar_btn_transparent_background.xml
+res/scrollbar_btn_transparent_background_dark.xml
 res/scrollbar_btn_up.png
 res/scrollbar_btn_up_dark.png
 res/scrollbar_indicator_horizontal.png
@@ -308,6 +310,7 @@ res/tab_btn_up_normal_dark.9.png
 res/tab_btn_up_selected.9.png
 res/tab_btn_up_selected_dark.9.png
 res/tab_more.png
+res/tab_more_dark.png
 res/tab_down_background_dark.xml
 res/tab_down_background_theme_dark.xml
 res/tab_up_background.9.png