Remove the Table widget

[libs/gltk.git] / source / layout.h

diff --git a/source/layout.h b/source/layout.h
index 7e8cdea123fc1a25f845bfb5ecf3e272df9d9b57..2bddb77cfa30bef43632036b8e2564e41e59a06e 100644 (file)
--- a/source/layout.h
+++ b/source/layout.h
@@ -1,10 +1,3 @@
-/* $Id$
-
-This file is part of libmspgltk
-Copyright © 2011  Mikko Rasa, Mikkosoft Productions
-Distributed under the LGPL
-*/
-
 #ifndef MSP_GLTK_LAYOUT_H_
 #define MSP_GLTK_LAYOUT_H_
 
@@ -27,11 +20,11 @@ is then solved to obtain positions and dimensions that fulfill the constraints.
 There are three kinds of constraints available: ordering, alignment and
 dimension matching.
 
-Ordering constraints specify that the widgets should be placed next to other
-along X or Y axis.  These operate on one axis at a time, so a widget could be
-"right of" another even if they are separated by hundreds of pixels vertically.
-The widgets will be separated by a spacing value, which is settable on a per-
-layout basis.
+Ordering constraints specify that the widgets should be placed next to each
+other along X or Y axis.  These operate on one axis at a time, so a widget
+could be "right of" another even if they are separated by hundreds of pixels
+vertically.  The widgets will be separated by a spacing value, which is
+settable on a per-layout basis.
 
 Alignment constraints make the corresponding edges of two widgets be on the
 same line.  These are incompatible with ordering constraints, so only one or
@@ -52,8 +45,8 @@ 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
-MixedRows and Grid.
+derived Layout classes that implement common positioning patterns.  See Row,
+Column, MixedRows and Grid.
 */
 class Layout
 {
@@ -64,9 +57,12 @@ 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:
@@ -76,6 +72,10 @@ 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,
@@ -91,6 +91,7 @@ protected:
        {
                ConstraintType type;
                Slot ⌖
+               int spacing;
 
                Constraint(ConstraintType, Slot &);
        };
@@ -106,8 +107,9 @@ 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;
@@ -117,6 +119,13 @@ protected:
                virtual ~Slot() { }
 
                void autosize_changed();
+               void visibility_changed(bool);
+       };
+
+       enum SolveMode
+       {
+               UPDATE,
+               AUTOSIZE
        };
 
        class LinearProgram;
@@ -124,9 +133,12 @@ protected:
 
        Container *container;
        std::list<Slot *> slots;
+       unsigned n_active_slots;
+       unsigned n_slack_constraints[2];
        Sides margin;
        unsigned row_spacing;
        unsigned col_spacing;
+       Geometry autosize_geom;
 
        static Pointers pointers[2];
 
@@ -136,27 +148,43 @@ public:
 
        void set_container(Container &);
        void set_margin(const Sides &);
+
+       /** Sets the default spacing between widgets in bothg 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);
 
        void add_widget(Widget &);
        void remove_widget(Widget &);
 protected:
        virtual Slot *create_slot(Widget &);
+       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);
 
        void update();
+       void autosize();
 
 protected:
-       void find_constraint_group(Slot &, ConstraintType, std::set<Slot *> &);
-       void sort_slots(std::list<Slot *> &, ConstraintType);
-       void solve_constraints(int);
+       void solve_constraints(int, SolveMode);
 };
 
 } // namespace GLtk