Add a signal for selection changes in Entry

[libs/gltk.git] / source / entry.cpp

diff --git a/source/entry.cpp b/source/entry.cpp
index 83ed563298b793b919d31d1a7bc442b0d3b24e2d..f75f2005bc2cdd880d4960cf26b6f1db2cde6cf1 100644 (file)
--- a/source/entry.cpp
+++ b/source/entry.cpp
@@ -70,17 +70,9 @@ void Entry::insert(unsigned pos, const string &t)
                return;
 
        text.insert(pos, t);
-
-       unsigned old_edit_pos = edit_pos;
-       if(edit_pos>=pos)
-               edit_pos += t.size();
-       if(selection_active && selection_pos>=pos)
-               selection_pos += t.size();
-
        signal_text_changed.emit(text.get());
-       if(edit_pos!=old_edit_pos)
-               signal_edit_position_changed.emit(edit_pos);
 
+       adjust_edit_position_for_change(pos, t.size());
        if(multiline)
                check_view_range();
 
@@ -93,24 +85,9 @@ void Entry::erase(unsigned pos, unsigned len)
                return;
 
        text.erase(pos, len);
-
-       unsigned old_edit_pos = edit_pos;
-       if(edit_pos>=pos+len)
-               edit_pos -= len;
-       else if(edit_pos>=pos)
-               edit_pos = pos;
-       if(selection_active)
-       {
-               if(selection_pos>=pos+len)
-                       selection_pos -= len;
-               else if(selection_pos>=pos)
-                       selection_pos = pos;
-       }
-
        signal_text_changed.emit(text.get());
-       if(edit_pos!=old_edit_pos)
-               signal_edit_position_changed.emit(edit_pos);
 
+       adjust_edit_position_for_change(pos, -len);
        if(multiline)
                check_view_range();
 
@@ -415,8 +392,39 @@ void Entry::move_edit_position(Navigation nav, bool select)
                throw invalid_argument("Entry::move_edit_position");
 }
 
+void Entry::adjust_edit_position_for_change(unsigned pos, int change)
+{
+       unsigned old_edit_pos = edit_pos;
+       unsigned old_select_pos = selection_pos;
+
+       if(change>0)
+       {
+               if(edit_pos>=pos)
+                       edit_pos += change;
+               if(selection_active && selection_pos>=pos)
+                       selection_pos += change;
+       }
+       else if(change<0)
+       {
+               if(edit_pos>=pos)
+                       edit_pos -= min<unsigned>(edit_pos-pos, -change);
+               if(selection_active && selection_pos>=pos)
+                       selection_pos -= min<unsigned>(selection_pos-pos, -change);
+       }
+
+       if(edit_pos!=old_edit_pos)
+               signal_edit_position_changed.emit(edit_pos);
+       if(selection_active && (edit_pos!=old_edit_pos || selection_pos!=old_select_pos))
+       {
+               unsigned start, end;
+               if(get_selection(start, end))
+                       signal_selection_changed.emit(start, end);
+       }
+}
+
 void Entry::set_edit_position(unsigned ep, bool select)
 {
+       bool selection_was_active = selection_active;
        if(select && !selection_active)
                selection_pos = edit_pos;
        selection_active = select;
@@ -425,7 +433,14 @@ void Entry::set_edit_position(unsigned ep, bool select)
        edit_pos = min(ep, text.size());
 
        if(edit_pos!=old_edit_pos)
+       {
                signal_edit_position_changed.emit(edit_pos);
+               unsigned start, end;
+               if(get_selection(start, end))
+                       signal_selection_changed.emit(start, end);
+               else if(selection_was_active)
+                       signal_selection_changed.emit(edit_pos, edit_pos);
+       }
 
        if(multiline)
                check_view_range();
@@ -487,6 +502,7 @@ void Entry::check_view_range()
                signal_scroll_position_changed.emit(first_row);
 
        slider->set_range(0, scroll);
+       slider->set_page_size(visible_rows);
        slider->set_value(scroll-first_row);
 }