diff --git a/src/dlangui/core/editable.d b/src/dlangui/core/editable.d
index 991556a7..3973d65c 100644
--- a/src/dlangui/core/editable.d
+++ b/src/dlangui/core/editable.d
@@ -614,7 +614,7 @@ class EditableContent {
     @property EditStateMark[] editMarks() { return _editMarks; }
 
     /// returns all lines concatenated delimited by '\n'
-    @property dstring text() {
+    @property dstring text() const {
         if (_lines.length == 0)
             return "";
         if (_lines.length == 1)
diff --git a/src/dlangui/dialogs/filedlg.d b/src/dlangui/dialogs/filedlg.d
index a78815d1..1030e00d 100644
--- a/src/dlangui/dialogs/filedlg.d
+++ b/src/dlangui/dialogs/filedlg.d
@@ -1210,7 +1210,7 @@ class FileNameEditLine : HorizontalLayout {
     @property void caption(dstring s) { _caption = s; }
 
     /// returns widget content text (override to support this)
-    override @property dstring text() { return _edFileName.text; }
+    override @property dstring text() const { return _edFileName.text; }
     /// sets widget content text (override to support this)
     override @property Widget text(dstring s) { _edFileName.text = s; return this; }
     /// sets widget content text (override to support this)
diff --git a/src/dlangui/dialogs/inputbox.d b/src/dlangui/dialogs/inputbox.d
index 04c6afe1..ede2cb8a 100644
--- a/src/dlangui/dialogs/inputbox.d
+++ b/src/dlangui/dialogs/inputbox.d
@@ -56,4 +56,18 @@ class InputBox : Dialog {
         _editor.selectAll();
         _editor.setFocus();
     }
+
+    override dstring text() const {
+        return _text;
+    }
+
+    override Widget text(dstring t) {
+        _text = t;
+        return this;
+    }
+
+    override Widget text(UIString s) {
+        _text = s;
+        return this;
+    }
 }
diff --git a/src/dlangui/widgets/combobox.d b/src/dlangui/widgets/combobox.d
index 964721fe..1e979989 100644
--- a/src/dlangui/widgets/combobox.d
+++ b/src/dlangui/widgets/combobox.d
@@ -284,7 +284,7 @@ class ComboBox : ComboBoxBase {
         return cast(StringListAdapter)_adapter;
     }
 
-    @property override dstring text() {
+    @property override dstring text() const {
         return _body.text;
     }
 
@@ -403,7 +403,7 @@ class IconTextComboBox : ComboBoxBase {
         return cast(StringListAdapter)_adapter;
     }
 
-    @property override dstring text() {
+    @property override dstring text() const {
         return _body.text;
     }
 
diff --git a/src/dlangui/widgets/controls.d b/src/dlangui/widgets/controls.d
index d5c65705..68e61ce8 100644
--- a/src/dlangui/widgets/controls.d
+++ b/src/dlangui/widgets/controls.d
@@ -355,7 +355,7 @@ class ImageTextButton : HorizontalLayout {
     protected TextWidget _label;
 
     /// Get label text
-    override @property dstring text() { return _label.text; }
+    override @property dstring text() const { return _label.text; }
     /// Set label plain unicode string
     override @property Widget text(dstring s) { _label.text = s; requestLayout(); return this; }
     /// Set label string resource Id
diff --git a/src/dlangui/widgets/editors.d b/src/dlangui/widgets/editors.d
index 438d9b98..de246dbe 100644
--- a/src/dlangui/widgets/editors.d
+++ b/src/dlangui/widgets/editors.d
@@ -995,7 +995,7 @@ class EditWidgetBase : ScrollWidgetBase, EditableContentListener, MenuItemAction
     protected bool _lastReportedModifiedState;
 
     /// get widget text
-    override @property dstring text() { return _content.text; }
+    override @property dstring text() const { return _content.text; }
 
     /// set text
     override @property Widget text(dstring s) {
diff --git a/src/dlangui/widgets/groupbox.d b/src/dlangui/widgets/groupbox.d
index ec3c6f52..a094feed 100644
--- a/src/dlangui/widgets/groupbox.d
+++ b/src/dlangui/widgets/groupbox.d
@@ -53,7 +53,7 @@ class GroupBox : LinearLayout {
     }
 
     /// get widget text
-    override @property dstring text() { return _caption.text; }
+    override @property dstring text() const { return _caption.text; }
     /// set text to show
     override @property Widget text(dstring s) {
         _caption.text = s;
diff --git a/src/dlangui/widgets/statusline.d b/src/dlangui/widgets/statusline.d
index 19e64460..0a46abae 100644
--- a/src/dlangui/widgets/statusline.d
+++ b/src/dlangui/widgets/statusline.d
@@ -38,7 +38,7 @@ class StatusLineTextPanel : StatusLinePanelBase {
         addChild(_text);
     }
     /// returns widget content text (override to support this)
-    override @property dstring text() { return _text.text; }
+    override @property dstring text() const { 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)
diff --git a/src/dlangui/widgets/widget.d b/src/dlangui/widgets/widget.d
index 7111524a..21756e6a 100644
--- a/src/dlangui/widgets/widget.d
+++ b/src/dlangui/widgets/widget.d
@@ -570,11 +570,17 @@ public:
     @property FontRef font() const { return stateStyle.font; }
 
     /// returns widget content text (override to support this)
-    @property dstring text() { return ""; }
+    @property dstring text() const {
+        assert(false, __FUNCTION__~" isn't implemented");
+    }
     /// sets widget content text (override to support this)
-    @property Widget text(dstring s) { return this; }
+    @property Widget text(dstring s) {
+        assert(false, __FUNCTION__~" isn't implemented");
+    }
     /// sets widget content text (override to support this)
-    @property Widget text(UIString s) { return this; }
+    @property Widget text(UIString s) {
+        assert(false, __FUNCTION__~" isn't implemented");
+    }
 
     /// override to handle font changes
     protected void handleFontChanged() {}