From deebbb5d23f7bdad0e25fe7eeb0a3e5a4eaf761f Mon Sep 17 00:00:00 2001 From: Mikko Rasa Date: Thu, 7 Nov 2013 14:57:14 +0200 Subject: [PATCH] Support floating widgets in layouts An arrangement class that automatically makes widgets floating is also added. --- source/floatingarrangement.cpp | 16 ++++++++++ source/floatingarrangement.h | 23 ++++++++++++++ source/layout.cpp | 55 +++++++++++++++++++++++++--------- source/layout.h | 3 ++ 4 files changed, 83 insertions(+), 14 deletions(-) create mode 100644 source/floatingarrangement.cpp create mode 100644 source/floatingarrangement.h diff --git a/source/floatingarrangement.cpp b/source/floatingarrangement.cpp new file mode 100644 index 0000000..6e707e8 --- /dev/null +++ b/source/floatingarrangement.cpp @@ -0,0 +1,16 @@ +#include "floatingarrangement.h" + +namespace Msp { +namespace GLtk { + +FloatingArrangement::FloatingArrangement(Layout &l): + Arrangement(l) +{ } + +void FloatingArrangement::finish_widget(Widget &wdg) +{ + layout.set_floating(wdg, true); +} + +} // namespace GLtk +} // namespace Msp diff --git a/source/floatingarrangement.h b/source/floatingarrangement.h new file mode 100644 index 0000000..a4ebdd7 --- /dev/null +++ b/source/floatingarrangement.h @@ -0,0 +1,23 @@ +#ifndef FLOATINGARRANGEMENT_H_ +#define FLOATINGARRANGEMENT_H_ + +#include "arrangement.h" + +namespace Msp { +namespace GLtk { + +class FloatingArrangement: public Arrangement +{ +public: + FloatingArrangement(Layout &); + +private: + virtual void process_widget(Widget &, Side, bool) { } + virtual void finish_widget(Widget &); + virtual void finish_slot() { } +}; + +} // namespace GLtk +} // namespace Msp + +#endif diff --git a/source/layout.cpp b/source/layout.cpp index 5df7bc1..02e1ec4 100644 --- a/source/layout.cpp +++ b/source/layout.cpp @@ -211,22 +211,31 @@ void Layout::remove_widget(Widget &wdg) void Layout::update_slot_indices() { n_active_slots = 0; + unsigned n_floating = 0; for(list::iterator i=slots.begin(); i!=slots.end(); ++i) { if((*i)->widget.is_visible() || (*i)->ghost) + { (*i)->index = n_active_slots++; + if((*i)->floating) + ++n_floating; + } else (*i)->index = -1; } - n_slack_vars[0] = 0; - n_slack_vars[1] = 0; + n_slack_vars[0] = n_floating*2; + n_slack_vars[1] = n_floating*2; for(list::iterator i=slots.begin(); i!=slots.end(); ++i) if((*i)->index>=0) { - for(unsigned j=0; j<2; ++j) - if(((*i)->*(pointers[j].packing)).gravity==0) - n_slack_vars[j] += 2; + if(!(*i)->floating) + { + for(unsigned j=0; j<2; ++j) + if(((*i)->*(pointers[j].packing)).gravity==0) + n_slack_vars[j] += 2; + } + for(list::iterator j=(*i)->constraints.begin(); j!=(*i)->constraints.end(); ++j) if(j->target.index>(*i)->index && (j->type&SLACK)) ++n_slack_vars[j->type&1]; @@ -312,6 +321,16 @@ void Layout::set_ghost(Widget &wdg, bool g) } } +void Layout::set_floating(Widget &wdg, bool f) +{ + Slot &slot = get_slot_for_widget(wdg); + + slot.floating = f; + + update_slot_indices(); + update(); +} + void Layout::update() { solve_constraints(HORIZONTAL, UPDATE); @@ -358,7 +377,8 @@ void Layout::solve_constraints(int dir, SolveMode mode) } else { - objective[(*i)->index*5] = ((*i)->*(ptrs.packing)).gravity/weight; + if(!(*i)->floating) + objective[(*i)->index*5] = ((*i)->*(ptrs.packing)).gravity/weight; objective[(*i)->index*5+1] = (((*i)->*(ptrs.packing)).expand ? weight : -1); } @@ -380,18 +400,24 @@ void Layout::solve_constraints(int dir, SolveMode mode) row.back() = geom.*(ptrs.dim)-margin.*(ptrs.high_margin); } - if(((*i)->*(ptrs.packing)).gravity==0) + if((*i)->floating || ((*i)->*(ptrs.packing)).gravity==0) { - /* Try to keep the widget as close to the center of the container - as possible. Since linear programs can't express absolute values - directly, use two opposing slack variables that are optimized for - a low value. */ + /* Try to keep the widget as close to a target position as possible. + Since linear programs can't express absolute values directly, use two + opposing slack variables that are optimized for a low value. */ + float a = ((*i)->*(ptrs.packing)).gravity*0.5+0.5; LinearProgram::Row row = linprog.add_row(); row[(*i)->index*5] = 1; - row[(*i)->index*5+1] = 0.5; + row[(*i)->index*5+1] = a; row[k] = 1; row[k+1] = -1; - row.back() = geom.*(ptrs.dim)/2; + if((*i)->floating) + { + const Geometry &cgeom = (*i)->widget.get_geometry(); + row.back() = cgeom.*(ptrs.pos)+cgeom.*(ptrs.dim)*a; + } + else + row.back() = geom.*(ptrs.dim)/2; objective[k] = -1; objective[k+1] = -1; k += 2; @@ -470,7 +496,8 @@ Layout::Slot::Slot(Layout &l, Widget &w): layout(l), index(0), widget(w), - ghost(false) + ghost(false), + floating(false) { vert_pack.gravity = 1; widget.signal_autosize_changed.connect(sigc::mem_fun(this, &Slot::autosize_changed)); diff --git a/source/layout.h b/source/layout.h index 043d92c..141a15c 100644 --- a/source/layout.h +++ b/source/layout.h @@ -153,6 +153,7 @@ private: Packing horiz_pack; Packing vert_pack; bool ghost; + bool floating; Slot(Layout &, Widget &); @@ -229,6 +230,8 @@ public: /// Sets a widget as a ghost, taking up space even if it is hidden. void set_ghost(Widget &, bool); + void set_floating(Widget &, bool); + void update(); void autosize(Geometry &); -- 2.43.0