From c8291177b545ec81930603a5915234a60296db51 Mon Sep 17 00:00:00 2001
From: Mikko Rasa <tdb@tdb.fi>
Date: Wed, 26 Jun 2013 14:24:08 +0300
Subject: [PATCH] Add a persistent view size attribute to List

---
 source/dropdown.cpp |  5 +++--
 source/list.cpp     | 28 +++++++++++++++-------------
 source/list.h       |  6 ++++--
 3 files changed, 22 insertions(+), 17 deletions(-)

diff --git a/source/dropdown.cpp b/source/dropdown.cpp
index ddf5c92..ce0ba71 100644
--- a/source/dropdown.cpp
+++ b/source/dropdown.cpp
@@ -28,6 +28,7 @@ void Dropdown::init()
 	dropped = false;
 
 	add(list);
+	list.set_view_all();
 	list.signal_item_selected.connect(sigc::mem_fun(this, &Dropdown::list_item_selected));
 	list.signal_autosize_changed.connect(sigc::mem_fun(this, &Dropdown::list_autosize_changed));
 }
@@ -38,7 +39,7 @@ void Dropdown::autosize()
 		return;
 
 	Widget::autosize();
-	list.autosize_all();
+	list.autosize();
 	geom.w = max(geom.w, list.get_geometry().w);
 
 	if(const Part *text_part = style->get_part("text"))
@@ -123,7 +124,7 @@ void Dropdown::list_autosize_changed()
 
 void Dropdown::resize_list()
 {
-	list.autosize_all();
+	list.autosize();
 	Geometry lgeom = list.get_geometry();
 	lgeom.x = 0;
 	lgeom.y = -lgeom.h;
diff --git a/source/list.cpp b/source/list.cpp
index 710d1fc..c74af90 100644
--- a/source/list.cpp
+++ b/source/list.cpp
@@ -31,6 +31,7 @@ void List::init()
 	sel_index = -1;
 	first = 0;
 	max_scroll = 0;
+	view_size = 5;
 
 	observer = new DataObserver(*this);
 
@@ -47,11 +48,6 @@ List::~List()
 }
 
 void List::autosize()
-{
-	autosize_rows(5);
-}
-
-void List::autosize_rows(unsigned n)
 {
 	if(!style)
 		return;
@@ -69,12 +65,12 @@ void List::autosize_rows(unsigned n)
 			items[i]->autosize();
 			const Geometry &igeom = items[i]->get_geometry();
 			max_w = max(max_w, igeom.w);
-			if(i<n)
+			if(view_size==0 || i<view_size)
 				total_h += igeom.h;
 		}
 
-		if(!items.empty() && items.size()<n)
-			total_h = total_h*n/items.size();
+		if(!items.empty() && items.size()<view_size)
+			total_h = total_h*view_size/items.size();
 
 		geom.w = max(geom.w, max_w+margin.left+margin.right);
 		geom.h = max(geom.h, total_h+margin.top+margin.bottom);
@@ -84,11 +80,6 @@ void List::autosize_rows(unsigned n)
 	rebuild();
 }
 
-void List::autosize_all()
-{
-	autosize_rows(data->size());
-}
-
 void List::set_data(ListData &d)
 {
 	delete observer;
@@ -114,6 +105,17 @@ List::Item *List::create_item(unsigned index)
 	return new BasicItem(data->get_string(index));
 }
 
+void List::set_view_size(unsigned s)
+{
+	view_size = s;
+	signal_autosize_changed.emit();
+}
+
+void List::set_view_all()
+{
+	set_view_size(0);
+}
+
 void List::set_selected_index(int i)
 {
 	if(i>static_cast<int>(data->size()))
diff --git a/source/list.h b/source/list.h
index 561e388..dd44f3b 100644
--- a/source/list.h
+++ b/source/list.h
@@ -76,6 +76,7 @@ private:
 	int sel_index;
 	unsigned first;
 	unsigned max_scroll;
+	unsigned view_size;
 
 	VSlider slider;
 	std::vector<Item *> items;
@@ -91,8 +92,6 @@ public:
 	virtual const char *get_class() const { return "list"; }
 
 	virtual void autosize();
-	void autosize_rows(unsigned);
-	void autosize_all();
 
 	void set_data(ListData &);
 	ListData &get_data() { return *data; }
@@ -101,7 +100,10 @@ private:
 	void items_changed();
 protected:
 	virtual Item *create_item(unsigned);
+
 public:
+	void set_view_size(unsigned);
+	void set_view_all();
 
 	void set_selected_index(int);
 	int get_selected_index() const { return sel_index; }
-- 
2.45.2