From 8eeb6ee5d40c21150839e24996cc3e9ef308374d Mon Sep 17 00:00:00 2001
From: Mikko Rasa <tdb@tdb.fi>
Date: Sun, 16 Jun 2013 22:33:52 +0300
Subject: [PATCH] Allow loading generic layout properties from datafiles

---
 source/layout.cpp | 69 +++++++++++++++++++++++++++++++++++++++++++++++
 source/layout.h   | 35 ++++++++++++++++++++++++
 source/panel.cpp  |  7 +++++
 source/panel.h    |  1 +
 4 files changed, 112 insertions(+)

diff --git a/source/layout.cpp b/source/layout.cpp
index 917d47a..c616ff6 100644
--- a/source/layout.cpp
+++ b/source/layout.cpp
@@ -1,5 +1,6 @@
 #include <algorithm>
 #include <limits>
+#include <msp/core/maputils.h>
 #include <msp/strings/format.h>
 #include "arrangement.h"
 #include "container.h"
@@ -481,6 +482,74 @@ void Layout::Slot::visibility_changed(bool v)
 }
 
 
+Layout::Loader::Loader(Layout &l, const WidgetMap &wm):
+	DataFile::ObjectLoader<Layout>(l),
+	wdg_map(wm)
+{
+	add("column_spacing", &Loader::column_spacing);
+	add("margin",         &Loader::margin);
+	add("row_spacing",    &Loader::row_spacing);
+	add("spacing",        &Loader::spacing);
+	add("widget",         &Loader::widget);
+}
+
+void Layout::Loader::column_spacing(unsigned s)
+{
+	obj.set_column_spacing(s);
+}
+
+void Layout::Loader::margin()
+{
+	Sides sides;
+	load_sub(sides);
+	obj.set_margin(sides);
+}
+
+void Layout::Loader::spacing(unsigned s)
+{
+	obj.set_spacing(s);
+}
+
+void Layout::Loader::row_spacing(unsigned s)
+{
+	obj.set_row_spacing(s);
+}
+
+void Layout::Loader::widget(const string &n)
+{
+	Widget &wdg = *get_item(wdg_map, n);
+	WidgetLoader ldr(obj, wdg, wdg_map);
+	load_sub_with(ldr);
+}
+
+
+Layout::WidgetLoader::WidgetLoader(Layout &l, Widget &w, const Layout::Loader::WidgetMap &wm):
+	layout(l),
+	widget(w),
+	wdg_map(wm)
+{
+	add("constraint", &WidgetLoader::constraint);
+	add("expand",     &WidgetLoader::expand);
+	add("gravity",    &WidgetLoader::gravity);
+}
+
+void Layout::WidgetLoader::constraint(ConstraintType type, const string &n)
+{
+	Widget &target = *get_item(wdg_map, n);
+	layout.add_constraint(widget, type, target);
+}
+
+void Layout::WidgetLoader::expand(bool h, bool v)
+{
+	layout.set_expand(widget, h, v);
+}
+
+void Layout::WidgetLoader::gravity(int h, int v)
+{
+	layout.set_gravity(widget, h, v);
+}
+
+
 void operator>>(const LexicalConverter &conv, Layout::ConstraintType &ctype)
 {
 	const string &str = conv.get();
diff --git a/source/layout.h b/source/layout.h
index 2de4013..b8c4edd 100644
--- a/source/layout.h
+++ b/source/layout.h
@@ -86,7 +86,42 @@ public:
 		COPY_HEIGHT = VERTICAL|SELF_DIM|TARGET_DIM
 	};
 
+	class Loader: public DataFile::ObjectLoader<Layout>
+	{
+	public:
+		typedef std::map<std::string, Widget *> WidgetMap;
+
+	private:
+		const WidgetMap &wdg_map;
+
+	public:
+		Loader(Layout &, const WidgetMap &);
+
+	private:
+		void column_spacing(unsigned);
+		void margin();
+		void row_spacing(unsigned);
+		void spacing(unsigned);
+		void widget(const std::string &);
+	};
+
 private:
+	class WidgetLoader: public DataFile::Loader
+	{
+	private:
+		Layout &layout;
+		Widget &widget;
+		const Layout::Loader::WidgetMap &wdg_map;
+
+	public:
+		WidgetLoader(Layout &, Widget &, const Layout::Loader::WidgetMap &);
+
+	private:
+		void constraint(ConstraintType, const std::string &);
+		void expand(bool, bool);
+		void gravity(int, int);
+	};
+
 	struct Slot;
 
 	struct Constraint
diff --git a/source/panel.cpp b/source/panel.cpp
index c90c83b..8c5dd38 100644
--- a/source/panel.cpp
+++ b/source/panel.cpp
@@ -95,6 +95,7 @@ Panel::Loader::Loader(Panel &p, map<string, Widget *> &m):
 	add("hslider",   &Loader::child<HSlider>);
 	add("indicator", &Loader::child<Indicator>);
 	add("label",     &Loader::child<Label>);
+	add("layout",    &Loader::layout);
 	add("list",      &Loader::child<List>);
 	add("panel",     &Loader::panel);
 	add("row",       &Loader::arrangement<Row>);
@@ -159,6 +160,12 @@ void Panel::Loader::grid(unsigned cols)
 	load_sub_with(ldr);
 }
 
+void Panel::Loader::layout()
+{
+	Layout::Loader ldr(get_layout(), wdg_map);
+	load_sub_with(ldr);
+}
+
 void Panel::Loader::panel(const string &n)
 {
 	RefPtr<Panel> p = new Panel();
diff --git a/source/panel.h b/source/panel.h
index 830f542..79e8bd4 100644
--- a/source/panel.h
+++ b/source/panel.h
@@ -37,6 +37,7 @@ public:
 		void expand(bool, bool);
 		void gravity(int, int);
 		void grid(unsigned);
+		void layout();
 		void panel(const std::string &);
 	};
 
-- 
2.43.0