Some more interfaces to support integrating Entry with other components

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

diff --git a/source/entry.cpp b/source/entry.cpp
index 70321dc5a68cf029128f07c52e9b06f44ea38f91..54c5fb7cbcdd49fc48f06dae0761c9843fd6b0de 100644 (file)
--- a/source/entry.cpp
+++ b/source/entry.cpp
@@ -64,11 +64,15 @@ void Entry::insert(unsigned pos, const string &t)
 {
        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();
 
+       if(edit_pos!=old_edit_pos)
+               signal_edit_position_changed.emit(edit_pos);
+
        if(multiline)
                check_view_range();
 
@@ -79,6 +83,7 @@ void Entry::erase(unsigned pos, unsigned len)
 {
        text.erase(pos, len);
 
+       unsigned old_edit_pos = edit_pos;
        if(edit_pos>=pos+len)
                edit_pos -= len;
        else if(edit_pos>=pos)
@@ -91,16 +96,8 @@ void Entry::erase(unsigned pos, unsigned len)
                        selection_pos = pos;
        }
 
-       if(multiline)
-               check_view_range();
-
-       rebuild();
-}
-
-void Entry::set_edit_position(unsigned pos)
-{
-       edit_pos = min(pos, text.size());
-       selection_active = false;
+       if(edit_pos!=old_edit_pos)
+               signal_edit_position_changed.emit(edit_pos);
 
        if(multiline)
                check_view_range();
@@ -121,6 +118,16 @@ bool Entry::get_selection(unsigned &start, unsigned &end) const
        return true;
 }
 
+void Entry::translate_position(unsigned pos, unsigned &row, unsigned &col) const
+{
+       text.offset_to_coords(pos, row, col);
+}
+
+unsigned Entry::translate_position(unsigned row, unsigned col) const
+{
+       return text.coords_to_offset(row, col);
+}
+
 void Entry::set_edit_size(unsigned w, unsigned h)
 {
        edit_width = w;
@@ -177,10 +184,8 @@ void Entry::rebuild_special(const Part &part)
                if(!text_part || !graphic || !graphic->get_texture())
                        return;
 
-               unsigned start = selection_pos;
-               unsigned end = edit_pos;
-               if(start>end)
-                       swap(start, end);
+               unsigned start, end;
+               get_selection(start, end);
 
                unsigned row, col;
                text.offset_to_coords(start, row, col);
@@ -252,25 +257,17 @@ bool Entry::key_press(unsigned key, unsigned mod)
                if(selection_active)
                        erase_selection();
                else if(edit_pos>0)
-               {
-                       text.erase(--edit_pos, 1);
-                       check_view_range();
-                       rebuild();
-               }
+                       erase(edit_pos-1, 1);
        }
        else if(key==Input::KEY_DELETE)
        {
                if(selection_active)
                        erase_selection();
                else
-                       text.erase(edit_pos, 1);
+                       erase(edit_pos, 1);
        }
        else if(key==Input::KEY_ENTER && multiline)
-       {
-               text.insert(edit_pos++, "\n");
-               check_view_range();
-               rebuild();
-       }
+               insert(edit_pos, "\n");
        else if(key==Input::KEY_END)
        {
                unsigned row, col;
@@ -303,9 +300,7 @@ bool Entry::character(wchar_t ch)
        {
                if(selection_active)
                        erase_selection();
-               text.insert(edit_pos, StringCodec::encode<StringCodec::Utf8>(StringCodec::ustring(1, ch)));
-               ++edit_pos;
-               rebuild();
+               insert(edit_pos, StringCodec::encode<StringCodec::Utf8>(StringCodec::ustring(1, ch)));
                return true;
        }
 
@@ -400,21 +395,23 @@ void Entry::set_edit_position(unsigned ep, bool select)
                selection_pos = edit_pos;
        selection_active = select;
 
-       edit_pos = ep;
-       check_view_range();
+       unsigned old_edit_pos = edit_pos;
+       edit_pos = min(ep, text.size());
+
+       if(edit_pos!=old_edit_pos)
+               signal_edit_position_changed.emit(edit_pos);
+
+       if(multiline)
+               check_view_range();
        rebuild();
 }
 
 void Entry::erase_selection()
 {
-       if(!selection_active)
+       unsigned start, end;
+       if(!get_selection(start, end))
                return;
 
-       unsigned start = selection_pos;
-       unsigned end = edit_pos;
-       if(start>end)
-               swap(start, end);
-
        text.erase(start, end-start);
        set_edit_position(start, false);
 }
@@ -440,20 +437,20 @@ void Entry::check_view_range()
        if(!multiline || !text_part)
                return;
 
-       float font_size = style->get_font_size();
-       unsigned line_spacing = static_cast<unsigned>(font_size*6/5);
-
-       const Sides &margin = text_part->get_margin();
-       visible_rows = max((geom.h-margin.top-margin.bottom)/line_spacing, 1U);
+       visible_rows = text.get_visible_lines(*text_part, geom, 0);
 
        unsigned row, col;
        text.offset_to_coords(edit_pos, row, col);
 
+       unsigned old_first_row = first_row;
        if(first_row>row)
                first_row = row;
        else if(row>=first_row+visible_rows)
                first_row = row+1-visible_rows;
 
+       if(first_row!=old_first_row)
+               signal_scroll_position_changed.emit(first_row);
+
        unsigned scroll = max(text.get_n_lines(), visible_rows)-visible_rows;
        slider->set_range(0, scroll);
        slider->set_value(scroll-first_row);
@@ -462,7 +459,12 @@ void Entry::check_view_range()
 void Entry::slider_value_changed(double value)
 {
        if(text.get_n_lines()>visible_rows)
+       {
+               unsigned old_first_row = first_row;
                first_row = text.get_n_lines()-visible_rows-static_cast<unsigned>(value);
+               if(first_row!=old_first_row)
+                       signal_scroll_position_changed.emit(first_row);
+       }
 }