1 #include <msp/gl/matrix.h>
2 #include <msp/gl/meshbuilder.h>
11 Slider::Slider(Direction d):
26 void Slider::set_value(double v)
28 double old_value = value;
36 unsigned steps = static_cast<unsigned>((v-min)/step+0.5);
37 value = min+steps*step;
42 signal_value_changed.emit(value);
47 void Slider::set_range(double a, double b)
54 void Slider::set_step(double s)
60 void Slider::set_page_size(double p)
66 void Slider::autosize_special(const Part &part, Geometry &ageom) const
68 if(part.get_name()=="slider")
70 const Sides &margin = part.get_margin();
71 const Geometry &pgeom = part.get_geometry();
72 ageom.w = std::max(ageom.w, pgeom.w*(dir==HORIZONTAL)/2+margin.left+margin.right);
73 ageom.h = std::max(ageom.h, pgeom.h*(dir==VERTICAL)/2+margin.top+margin.bottom);
77 void Slider::rebuild_special(const Part &part)
79 if(part.get_name()=="slider")
81 const Graphic *graphic = part.get_graphic(state);
82 if(!graphic || !graphic->get_texture())
85 float pos_fraction = ((max>min) ? (value-min)/(max-min) : 0);
86 float fill_fraction = ((max>min) ? page_size/(max-min+page_size) : 1);
88 Alignment align = part.get_alignment();
89 Geometry sgeom = geom;
92 align.x = pos_fraction;
93 sgeom.w = std::max(slider_min_size+total_margin, static_cast<unsigned>(sgeom.w*fill_fraction));
97 align.y = pos_fraction;
98 sgeom.h = std::max(slider_min_size+total_margin, static_cast<unsigned>(sgeom.h*fill_fraction));
101 sgeom.x = static_cast<unsigned>((geom.w-sgeom.w)*pos_fraction);
102 sgeom.y = static_cast<unsigned>((geom.h-sgeom.h)*pos_fraction);
104 Geometry rgeom = part.get_geometry();
105 align.apply(rgeom, sgeom, part.get_margin());
106 slider_size = (dir==HORIZONTAL ? rgeom.w : rgeom.h);
108 GL::MeshBuilder bld(part_cache.create_mesh(part, *graphic->get_texture()));
109 bld.transform(GL::Matrix::translation(sgeom.x+rgeom.x, sgeom.y+rgeom.y, 0));
110 graphic->build(rgeom.w, rgeom.h, bld);
114 void Slider::button_press(int x, int y, unsigned btn)
119 int p = (dir==HORIZONTAL ? x : y);
121 p -= drag_area_offset;
122 if(p<0 || p>=static_cast<int>(drag_area_size))
125 int sp = static_cast<int>((drag_area_size-slider_size)*(value-min)/(max-min));
127 set_value(value-page_size);
128 else if(p>=static_cast<int>(sp+slider_size))
129 set_value(value+page_size);
134 drag_start_value = value;
139 void Slider::button_release(int, int, unsigned btn)
141 if(btn==1 && dragging)
148 void Slider::pointer_motion(int x, int y)
150 if(dragging && max>min)
152 int p = (dir==HORIZONTAL ? x : y);
153 set_value(drag_start_value+(p-drag_start_pos)*(max-min)/(drag_area_size-slider_size));
157 void Slider::on_size_change()
159 drag_area_size = (dir==HORIZONTAL ? geom.w : geom.h)-total_margin;
162 void Slider::on_style_change()
167 if(const Part *slider_part = style->get_part("slider"))
169 const Geometry &pgeom = slider_part->get_geometry();
170 const Sides &margin = slider_part->get_margin();
173 slider_min_size = pgeom.w;
174 drag_area_offset = margin.left;
175 total_margin = margin.left+margin.right;
179 slider_min_size = pgeom.h;
180 drag_area_offset = margin.bottom;
181 total_margin = margin.bottom+margin.top;
189 Slider::Loader::Loader(Slider &s):
190 DataFile::DerivedObjectLoader<Slider, Widget::Loader>(s)
192 add("range", &Slider::min, &Slider::max);
193 add("step", &Slider::step);
194 add("page_size", &Slider::page_size);
195 add("value", &Slider::value);