diff -r 012418e7dc90 -r bcf880b29bc3 ui/motif/text.c
--- a/ui/motif/text.c	Thu Apr 03 11:12:22 2014 +0200
+++ b/ui/motif/text.c	Thu Apr 03 14:16:41 2014 +0200
@@ -46,6 +46,17 @@
     Widget text_area = XmCreateScrolledText(parent, "text_area", args, n);
     XtManageChild(text_area);
     
+    UiTextArea *uitext = ucx_mempool_malloc(
+            obj->ctx->mempool,
+            sizeof(UiTextArea));
+    uitext->ctx = obj->ctx;
+    uitext->last_selection_state = 0;
+    XtAddCallback(
+                text_area,
+                XmNmotionVerifyCallback,
+                (XtCallbackProc)ui_text_selection_callback,
+                uitext);
+    
     // bind value
     if(value) {
         value->set = ui_textarea_set;
@@ -114,6 +125,25 @@
     return mgr;
 }
 
+void ui_text_selection_callback(
+        Widget widget,
+        UiTextArea *textarea,
+        XtPointer data)
+{
+    long left = 0;
+    long right = 0;
+    XmTextGetSelectionPosition(widget, &left, &right);
+    int sel = left < right ? 1 : 0;
+    if(sel != textarea->last_selection_state) {
+        if(sel) {
+            ui_set_group(textarea->ctx, UI_GROUP_SELECTION);
+        } else {
+            ui_unset_group(textarea->ctx, UI_GROUP_SELECTION);
+        }
+    }
+    textarea->last_selection_state = sel;
+}
+
 void ui_text_modify_callback(Widget widget, UiText *value, XtPointer data) {
     XmTextVerifyCallbackStruct *txv = (XmTextVerifyCallbackStruct*)data;
     int type = txv->text->length > 0 ? UI_TEXTBUF_INSERT : UI_TEXTBUF_DELETE;