fixes

src/dlangui/widgets/statusline.d

@@ -23,9 +23,87 @@ module dlangui.widgets.statusline;
 import dlangui.widgets.layouts;
 import dlangui.widgets.controls;
 
+class StatusLinePanelBase : HorizontalLayout {
+    this(string ID) {
+        super(ID);
+    }
+}
+
+class StatusLineTextPanel : StatusLinePanelBase {
+    protected TextWidget _text;
+    this(string ID) {
+        super(ID);
+        _text = new TextWidget(null, ""d);
+        addChild(_text);
+    }
+    /// returns widget content text (override to support this)
+    override @property dstring text() { return _text.text; }
+    /// sets widget content text (override to support this)
+    override @property Widget text(dstring s) { _text.text = s; return this; }
+    /// sets widget content text (override to support this)
+    override @property Widget text(UIString s) { _text.text = s; return this; }
+}
+
+class StatusLineIconPanel : StatusLinePanelBase {
+    protected ImageWidget _icon;
+    this(string ID) {
+        super(ID);
+        _icon = new ImageWidget(null);
+        addChild(_icon);
+    }
+    @property string iconId() {
+        return _icon.drawableId;
+    }
+    @property void iconId(string icon) {
+        _icon.drawableId = icon;
+    }
+}
+
+class StatusLineTextAndIconPanel : StatusLineTextPanel {
+    protected ImageWidget _icon;
+    this(string ID) {
+        super(ID);
+        _icon = new ImageWidget(null);
+        _icon.minWidth = 20;
+        _icon.minHeight = 20;
+        _icon.alignment = Align.Center;
+        addChild(_icon);
+    }
+    @property string iconId() {
+        return _icon.drawableId;
+    }
+    @property void iconId(string icon) {
+        _icon.drawableId = icon;
+    }
+}
+
+class StatusLineBackgroundOperationPanel : StatusLineTextAndIconPanel {
+    this(string ID) {
+        super(ID);
+        visibility = Visibility.Gone;
+    }
+    protected uint animationProgress;
+    /// show / update / animate background operation status; when both parameters are nulls, hide background op status panel
+    void setBackgroundOperationStatus(string icon, dstring statusText) {
+        if (icon || statusText) {
+            visibility = Visibility.Visible;
+            text = statusText;
+            iconId = icon;
+            animationProgress = (animationProgress + 30) % 512;
+            uint a = animationProgress;
+            if (a >= 256)
+                a = 512 - a;
+            _icon.backgroundColor((a << 24) | (0x00FF00));
+        } else {
+            visibility = Visibility.Gone;
+        }
+    }
+}
+
 /// Status line control
 class StatusLine : HorizontalLayout {
-    TextWidget _defStatus;
+    protected TextWidget _defStatus;
+    protected StatusLineBackgroundOperationPanel _backgroundOperationPanel;
     this() {
         super("STATUS_LINE");
         styleId = STYLE_STATUS_LINE;
@@ -36,6 +114,8 @@ class StatusLine : HorizontalLayout {
         _defStatus.layoutWidth(FILL_PARENT);
         _defStatus.text = "DLANGUI"d;
         addChild(_defStatus);
+        _backgroundOperationPanel = new StatusLineBackgroundOperationPanel("BACKGROUND_OP_STATUS");
+        addChild(_backgroundOperationPanel);
     }
     /// set text to show in status line in specific panel
     void setStatusText(string itemId, dstring value) {
@@ -46,6 +126,7 @@ class StatusLine : HorizontalLayout {
         setStatusText(null, value);
     }
     /// show / update / animate background operation status; when both parameters are nulls, hide background op status panel
-    void setBackgroundOperationStatus(string icon, dstring statusText) {
+    void setBackgroundOperationStatus(string icon, dstring statusText = null) {
+        _backgroundOperationPanel.setBackgroundOperationStatus(icon, statusText);
     }
 }

src/dlangui/widgets/widget.d

@@ -555,9 +555,12 @@ class Widget {
     /// sets widget visibility (Visible, Invisible, Gone)
     @property Widget visibility(Visibility visible) {
         if (_visibility != visible) {
-            if ((_visibility == Visibility.Gone) || (visible == Visibility.Gone))
+            if ((_visibility == Visibility.Gone) || (visible == Visibility.Gone)) {
-                requestLayout();
+                if (parent)
+                    parent.requestLayout();
                 else
+                    requestLayout();
+            } else
                 invalidate();
             _visibility = visible;
         }