1 #include <msp/gl/matrix.h>
2 #include <msp/gl/meshbuilder.h>
11 Slider::Slider(Direction d):
15 void Slider::set_value(double v)
17 double old_value = value;
25 unsigned steps = static_cast<unsigned>((v-min)/step+0.5);
26 value = min+steps*step;
31 signal_value_changed.emit(value);
36 void Slider::set_range(double a, double b)
43 void Slider::set_step(double s)
49 void Slider::set_page_size(double p)
55 void Slider::autosize_special(const Part &part, Geometry &ageom) const
57 if(part.get_name()=="slider")
59 const Sides &margin = part.get_margin();
60 const Geometry &pgeom = part.get_geometry();
61 ageom.w = std::max(ageom.w, pgeom.w*(dir==HORIZONTAL)/2+margin.left+margin.right);
62 ageom.h = std::max(ageom.h, pgeom.h*(dir==VERTICAL)/2+margin.top+margin.bottom);
66 void Slider::rebuild_special(const Part &part)
68 if(part.get_name()=="slider")
70 const Graphic *graphic = part.get_graphic(state);
71 if(!graphic || !graphic->get_texture())
74 float pos_fraction = ((max>min) ? (value-min)/(max-min) : 0);
75 float fill_fraction = ((max>min) ? page_size/(max-min+page_size) : 1);
77 Alignment align = part.get_alignment();
78 Geometry sgeom = geom;
81 align.x = pos_fraction;
82 sgeom.w = std::max(slider_min_size+total_margin, static_cast<unsigned>(sgeom.w*fill_fraction));
86 align.y = pos_fraction;
87 sgeom.h = std::max(slider_min_size+total_margin, static_cast<unsigned>(sgeom.h*fill_fraction));
90 sgeom.x = static_cast<unsigned>((geom.w-sgeom.w)*pos_fraction);
91 sgeom.y = static_cast<unsigned>((geom.h-sgeom.h)*pos_fraction);
93 Geometry rgeom = part.get_geometry();
94 align.apply(rgeom, sgeom, part.get_margin());
95 slider_size = (dir==HORIZONTAL ? rgeom.w : rgeom.h);
97 GL::MeshBuilder bld(part_cache.create_mesh(part, *graphic->get_texture()));
98 bld.transform(GL::Matrix::translation(sgeom.x+rgeom.x, sgeom.y+rgeom.y, 0));
99 graphic->build(rgeom.w, rgeom.h, bld);
103 void Slider::button_press(int x, int y, unsigned btn)
108 int p = (dir==HORIZONTAL ? x : y);
110 p -= drag_area_offset;
111 if(p<0 || p>=static_cast<int>(drag_area_size))
114 int sp = static_cast<int>((drag_area_size-slider_size)*(value-min)/(max-min));
116 set_value(value-page_size);
117 else if(p>=static_cast<int>(sp+slider_size))
118 set_value(value+page_size);
123 drag_start_value = value;
128 void Slider::button_release(int, int, unsigned btn)
130 if(btn==1 && dragging)
137 void Slider::pointer_motion(int x, int y)
139 if(dragging && max>min)
141 int p = (dir==HORIZONTAL ? x : y);
142 set_value(drag_start_value+(p-drag_start_pos)*(max-min)/(drag_area_size-slider_size));
146 void Slider::on_size_change()
148 drag_area_size = (dir==HORIZONTAL ? geom.w : geom.h)-total_margin;
151 void Slider::on_style_change()
156 if(const Part *slider_part = style->find_part("slider"))
158 const Geometry &pgeom = slider_part->get_geometry();
159 const Sides &margin = slider_part->get_margin();
162 slider_min_size = pgeom.w;
163 drag_area_offset = margin.left;
164 total_margin = margin.left+margin.right;
168 slider_min_size = pgeom.h;
169 drag_area_offset = margin.bottom;
170 total_margin = margin.bottom+margin.top;
178 Slider::Loader::Loader(Slider &s):
179 DataFile::DerivedObjectLoader<Slider, Widget::Loader>(s)
181 add("range", &Slider::min, &Slider::max);
182 add("step", &Slider::step);
183 add("page_size", &Slider::page_size);
184 add("value", &Slider::value);