From: Mikko Rasa <tdb@tdb.fi>
Date: Fri, 6 Mar 2015 00:03:34 +0000 (+0200)
Subject: Add a selection_cleared signal to List
X-Git-Url: http://git.tdb.fi/?p=libs%2Fgltk.git;a=commitdiff_plain;h=08b48157dc9ca5a4bd59d8eec9fa4e3bff8f0503

Add a selection_cleared signal to List
---

diff --git a/source/dropdown.cpp b/source/dropdown.cpp
index e483033..5b1d19b 100644
--- a/source/dropdown.cpp
+++ b/source/dropdown.cpp
@@ -62,13 +62,6 @@ void Dropdown::autosize_special(const Part &part, Geometry &ageom) const
 	}
 }
 
-void Dropdown::set_selected_index(int index)
-{
-	list.set_selected_index(index);
-	if(index<0)
-		text.set(string());
-}
-
 void Dropdown::rebuild_special(const Part &part)
 {
 	if(part.get_name()=="text")
diff --git a/source/dropdown.h b/source/dropdown.h
index 24c62cf..ad8b461 100644
--- a/source/dropdown.h
+++ b/source/dropdown.h
@@ -49,7 +49,7 @@ public:
 	template<typename T>
 	void set_item_type() { list.set_item_type<T>(); }
 
-	void set_selected_index(int);
+	void set_selected_index(int i) { list.set_selected_index(i); }
 	int get_selected_index() const { return list.get_selected_index(); }
 
 private:
diff --git a/source/list.cpp b/source/list.cpp
index f61d7c2..0f887f3 100644
--- a/source/list.cpp
+++ b/source/list.cpp
@@ -147,13 +147,16 @@ void List::set_selected_index(int i)
 	if(i>=static_cast<int>(data->size()))
 		throw out_of_range("List::set_selected_index");
 
-	if(i==sel_index)
+	if(i==sel_index || (i<0 && sel_index<0))
 		return;
 
 	if(sel_index>=0)
 		items[sel_index]->set_active(false);
 	if(i<0)
+	{
 		sel_index = -1;
+		signal_selection_cleared.emit();
+	}
 	else
 	{
 		sel_index = i;
@@ -312,6 +315,7 @@ void List::DataObserver::item_added(unsigned i)
 
 void List::DataObserver::item_removed(unsigned i)
 {
+	bool had_selection = (list.sel_index>=0);
 	if(list.sel_index>static_cast<int>(i))
 		--list.sel_index;
 	else if(list.sel_index==static_cast<int>(i))
@@ -320,6 +324,9 @@ void List::DataObserver::item_removed(unsigned i)
 	delete list.items[i];
 	list.items.erase(list.items.begin()+i);
 	list.items_changed();
+
+	if(had_selection && list.sel_index<0)
+		list.signal_selection_cleared.emit();
 }
 
 void List::DataObserver::cleared()
@@ -329,6 +336,8 @@ void List::DataObserver::cleared()
 		delete *i;
 	list.items.clear();
 	list.items_changed();
+
+	list.signal_selection_cleared.emit();
 }
 
 void List::DataObserver::refresh_item(unsigned i)
diff --git a/source/list.h b/source/list.h
index 8e9a851..246a729 100644
--- a/source/list.h
+++ b/source/list.h
@@ -130,6 +130,7 @@ private:
 
 public:
 	sigc::signal<void, unsigned> signal_item_selected;
+	sigc::signal<void> signal_selection_cleared;
 
 private:
 	ListData *data;