X-Git-Url: http://git.tdb.fi/?a=blobdiff_plain;f=source%2Flayout.h;h=043d92cc1554b738092ce3ad771fcf5bb3cc5049;hb=813a0fc10cf5f7aaa6356cd97a4258fa78b9b87f;hp=582bc1b0f685297b053ca73e38044aef592d777b;hpb=39cf4c8d917dc60c087fb4af6885bfa78f6fba34;p=libs%2Fgltk.git

diff --git a/source/layout.h b/source/layout.h
index 582bc1b..043d92c 100644
--- a/source/layout.h
+++ b/source/layout.h
@@ -4,11 +4,13 @@
 #include <list>
 #include <set>
 #include <sigc++/trackable.h>
+#include <msp/strings/lexicalcast.h>
 #include "geometry.h"
 
 namespace Msp {
 namespace GLtk {
 
+class Arrangement;
 class Container;
 class Widget;
 
@@ -44,9 +46,9 @@ flag for a widget causes it to use as much space as possible.  If multiple co-
 dependent widgets have the expand flag set, the results are currently
 undefined.
 
-Since specifiyng constraints manually can be quite tedious, there are some
-derived Layout classes that implement common positioning patterns.  See Row,
-Column, MixedRows and Grid.
+Since specifiyng constraints manually can be quite tedious, an Arrangement
+interface is provided to automatically arrange widgets.  See classes Row,
+Column and Grid for some commonly used arrangements.
 */
 class Layout
 {
@@ -57,9 +59,12 @@ private:
 		VERTICAL = 1,
 		SELF_POS = 2,
 		SELF_DIM = 4,
+		SELF_MASK = 6,
 		TARGET_POS = 8,
 		TARGET_DIM = 16,
-		SPACING = 32
+		TARGET_MASK = 24,
+		SPACING = 32,
+		SLACK = 64
 	};
 
 public:
@@ -69,6 +74,10 @@ public:
 		BELOW = VERTICAL|SELF_POS|SELF_DIM|TARGET_POS|SPACING,
 		RIGHT_OF = HORIZONTAL|SELF_POS|TARGET_POS|TARGET_DIM|SPACING,
 		LEFT_OF = HORIZONTAL|SELF_POS|SELF_DIM|TARGET_POS|SPACING,
+		FAR_ABOVE = VERTICAL|SELF_POS|TARGET_POS|TARGET_DIM|SPACING|SLACK,
+		FAR_BELOW = VERTICAL|SELF_POS|SELF_DIM|TARGET_POS|SPACING|SLACK,
+		FAR_RIGHT_OF = HORIZONTAL|SELF_POS|TARGET_POS|TARGET_DIM|SPACING|SLACK,
+		FAR_LEFT_OF = HORIZONTAL|SELF_POS|SELF_DIM|TARGET_POS|SPACING|SLACK,
 		ALIGN_TOP = VERTICAL|SELF_POS|SELF_DIM|TARGET_POS|TARGET_DIM,
 		ALIGN_BOTTOM = VERTICAL|SELF_POS|TARGET_POS,
 		ALIGN_RIGHT = HORIZONTAL|SELF_POS|SELF_DIM|TARGET_POS|TARGET_DIM,
@@ -77,13 +86,50 @@ public:
 		COPY_HEIGHT = VERTICAL|SELF_DIM|TARGET_DIM
 	};
 
-protected:
+	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 ghost(bool);
+		void gravity(int, int);
+	};
+
 	struct Slot;
 
 	struct Constraint
 	{
 		ConstraintType type;
 		Slot &target;
+		int spacing;
 
 		Constraint(ConstraintType, Slot &);
 	};
@@ -99,17 +145,25 @@ protected:
 	struct Slot: public sigc::trackable
 	{
 		Layout &layout;
-		unsigned index;
+		int index;
 		Widget &widget;
+		Geometry autosize_geom;
 		Geometry geom;
 		std::list<Constraint> constraints;
 		Packing horiz_pack;
 		Packing vert_pack;
+		bool ghost;
 
 		Slot(Layout &, Widget &);
-		virtual ~Slot() { }
 
 		void autosize_changed();
+		void visibility_changed(bool);
+	};
+
+	enum SolveMode
+	{
+		UPDATE,
+		AUTOSIZE
 	};
 
 	class LinearProgram;
@@ -117,39 +171,73 @@ protected:
 
 	Container *container;
 	std::list<Slot *> slots;
+	unsigned n_active_slots;
+	unsigned n_slack_vars[2];
 	Sides margin;
 	unsigned row_spacing;
 	unsigned col_spacing;
+	Geometry autosize_geom;
+	std::list<Arrangement *> arrangement_stack;
 
 	static Pointers pointers[2];
 
 public:
 	Layout();
-	virtual ~Layout();
+	~Layout();
 
 	void set_container(Container &);
 	void set_margin(const Sides &);
+	const Sides &get_margin() const { return margin; }
+
+	/** Sets the default spacing between widgets in both directions. */
 	void set_spacing(unsigned);
+
+	/** Sets the default vertical spacing between widgets.  Affects the ABOVE
+	and BELOW constraints. */
 	void set_row_spacing(unsigned);
+
+	/** Sets the default horizontal spacing between widgets.  Affects the
+	LEFT_OF and RIGHT_OF constraints. */
 	void set_column_spacing(unsigned);
 
+	unsigned get_row_spacing() const { return row_spacing; }
+	unsigned get_column_spacing() const { return col_spacing; }
+
+	void push_arrangement(Arrangement &);
+	Arrangement *get_arrangement() const;
+	void pop_arrangement(Arrangement &);
+
 	void add_widget(Widget &);
 	void remove_widget(Widget &);
-protected:
-	virtual Slot *create_slot(Widget &);
+private:
+	void update_slot_indices();
 	Slot &get_slot_for_widget(Widget &);
 	static ConstraintType complement(ConstraintType);
+	void create_constraint(Widget &, ConstraintType, Widget &, int);
+
 public:
-	void add_constraint(Widget &, ConstraintType, Widget &);
+	/** Adds a constraint between two widgets. */
+	void add_constraint(Widget &src, ConstraintType type, Widget &tgt);
+
+	/** Adds a constraint between two widgets, overriding the default spacing.
+	Not all constraint types use a spacing. */
+	void add_constraint(Widget &src, ConstraintType type, Widget &tgt, unsigned);
+
 	void set_gravity(Widget &, int, int);
 	void set_expand(Widget &, bool, bool);
 
+	/// Sets a widget as a ghost, taking up space even if it is hidden.
+	void set_ghost(Widget &, bool);
+
 	void update();
+	void autosize(Geometry &);
 
-protected:
-	void solve_constraints(int);
+private:
+	void solve_constraints(int, SolveMode);
 };
 
+void operator>>(const LexicalConverter &, Layout::ConstraintType &);
+
 } // namespace GLtk
 } // namespace Msp