Allow overriding the spacing between two widgets in LinearArrangement

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

diff --git a/source/arrangement.h b/source/arrangement.h
index 284d3f7edd7079279848ce4f9e1371e29d484b77..7028aed4ecfd868b0ccfedb56e58194094179e02 100644 (file)
--- a/source/arrangement.h
+++ b/source/arrangement.h
@@ -2,6 +2,7 @@
 #define MSP_GLTK_ARRANGEMENT_H_
 
 #include <list>
+#include <stdexcept>
 #include "layout.h"
 
 namespace Msp {
@@ -9,6 +10,13 @@ namespace GLtk {
 
 class Widget;
 
+class arrangement_error: public std::logic_error
+{
+public:
+       arrangement_error(const std::string &w): std::logic_error(w) { }
+       virtual ~arrangement_error() throw() { }
+};
+
 class Arrangement
 {
 protected:
@@ -30,6 +38,7 @@ protected:
                bool empty() { return widgets.empty(); }
                void clear();
                void add(Widget &, bool);
+               void align();
        };
 
        Layout &layout;
@@ -48,8 +57,11 @@ protected:
        virtual void finish_widget(Widget &) = 0;
        virtual void finish_slot() = 0;
        const Edge &get_edge(Side s) const { return edges[s]; }
-       void add_constraint(Widget &, Layout::ConstraintType, Side);
-       void add_constraint(Widget &, Layout::ConstraintType, const Edge &);
+       void add_constraint(Widget &, Layout::ConstraintType, Side, int = -1);
+       void add_constraint(Widget &, Layout::ConstraintType, const Edge &, int = -1);
+
+       static Layout::ConstraintType get_order_constraint(Side, bool);
+       static Layout::ConstraintType get_align_constraint(Side);
 };
 
 } // namespace GLtk