Rework how widget ownership works in Container

[libs/gltk.git] / source / slider.cpp

diff --git a/source/slider.cpp b/source/slider.cpp
index 11e4c24dc6461c0c49910b030ee18a7a6240a00d..b860d7d8410af507729487bfc45723eb804b20e1 100644 (file)
--- a/source/slider.cpp
+++ b/source/slider.cpp
@@ -1,45 +1,187 @@
+#include <msp/gl/matrix.h>
+#include <msp/gl/meshbuilder.h>
+#include "graphic.h"
+#include "part.h"
 #include "slider.h"
+#include "style.h"
 
 namespace Msp {
 namespace GLtk {
 
-Slider::Slider(const Resources &r):
-       Widget(r),
-       min(0),
-       max(1),
-       value(0),
-       step(0.1)
+Slider::Slider(Direction d):
+       dir(d)
 { }
 
+void Slider::set_value(double v)
+{
+       double old_value = value;
+
+       if(v<min)
+               value = min;
+       else if(v>max)
+               value = max;
+       else
+       {
+               double steps = round((v-min)/step);
+               value = min+steps*step;
+       }
+
+       if(value!=old_value)
+       {
+               signal_value_changed.emit(value);
+               mark_rebuild();
+       }
+}
+
 void Slider::set_range(double a, double b)
 {
-       min=a;
-       max=b;
+       min = a;
+       max = b;
        set_value(value);
 }
 
 void Slider::set_step(double s)
 {
-       step=s;
+       step = s;
        set_value(value);
 }
 
-void Slider::set_value(double v)
+void Slider::set_page_size(double p)
 {
-       double old_value=value;
+       page_size = p;
+       mark_rebuild();
+}
 
-       if(v<min)
-               value=min;
-       else if(v>max)
-               value=max;
+void Slider::autosize_special(const Part &part, Geometry &ageom) const
+{
+       if(part.get_name()=="slider")
+       {
+               const Sides &margin = part.get_margin();
+               const Geometry &pgeom = part.get_geometry();
+               ageom.w = std::max(ageom.w, pgeom.w*(dir==HORIZONTAL)/2+margin.left+margin.right);
+               ageom.h = std::max(ageom.h, pgeom.h*(dir==VERTICAL)/2+margin.top+margin.bottom);
+       }
+}
+
+void Slider::rebuild_special(const Part &part)
+{
+       if(part.get_name()=="slider")
+       {
+               const Graphic *graphic = part.get_graphic(state);
+               if(!graphic || !graphic->get_texture())
+                       return;
+
+               float pos_fraction = ((max>min) ? (value-min)/(max-min) : 0);
+               float fill_fraction = ((max>min) ? page_size/(max-min+page_size) : 1);
+
+               Alignment align = part.get_alignment();
+               Geometry sgeom = geom;
+               if(dir==HORIZONTAL)
+               {
+                       align.x = pos_fraction;
+                       sgeom.w = std::max(slider_min_size+total_margin, static_cast<unsigned>(sgeom.w*fill_fraction));
+               }
+               else
+               {
+                       align.y = pos_fraction;
+                       sgeom.h = std::max(slider_min_size+total_margin, static_cast<unsigned>(sgeom.h*fill_fraction));
+               }
+
+               sgeom.x = static_cast<unsigned>((geom.w-sgeom.w)*pos_fraction);
+               sgeom.y = static_cast<unsigned>((geom.h-sgeom.h)*pos_fraction);
+
+               Geometry rgeom = part.get_geometry();
+               align.apply(rgeom, sgeom, part.get_margin());
+               slider_size = (dir==HORIZONTAL ? rgeom.w : rgeom.h);
+
+               GL::MeshBuilder bld(part_cache.create_mesh(part, *graphic->get_texture()));
+               bld.transform(GL::Matrix::translation(sgeom.x+rgeom.x, sgeom.y+rgeom.y, 0));
+               graphic->build(rgeom.w, rgeom.h, bld);
+       }
+}
+
+void Slider::button_press(int x, int y, unsigned btn)
+{
+       if(btn!=1)
+               return;
+
+       int p = (dir==HORIZONTAL ? x : y);
+
+       p -= drag_area_offset;
+       if(p<0 || p>=static_cast<int>(drag_area_size))
+               return;
+
+       int sp = static_cast<int>((drag_area_size-slider_size)*(value-min)/(max-min));
+       if(p<sp)
+               set_value(value-page_size);
+       else if(p>=static_cast<int>(sp+slider_size))
+               set_value(value+page_size);
        else
        {
-               unsigned steps=static_cast<unsigned>((v-min)/step+0.5);
-               value=min+steps*step;
+               dragging = true;
+               drag_start_pos = p;
+               drag_start_value = value;
+               set_state(ACTIVE);
        }
+}
 
-       if(value!=old_value)
-               signal_value_changed.emit(value);
+void Slider::button_release(int, int, unsigned btn)
+{
+       if(btn==1 && dragging)
+       {
+               dragging = false;
+               clear_state(ACTIVE);
+       }
+}
+
+void Slider::pointer_motion(int x, int y)
+{
+       if(dragging && max>min)
+       {
+               int p = (dir==HORIZONTAL ? x : y);
+               set_value(drag_start_value+(p-drag_start_pos)*(max-min)/(drag_area_size-slider_size));
+       }
+}
+
+void Slider::on_size_change()
+{
+       drag_area_size = (dir==HORIZONTAL ? geom.w : geom.h)-total_margin;
+}
+
+void Slider::on_style_change()
+{
+       if(!style)
+               return;
+
+       if(const Part *slider_part = style->find_part("slider"))
+       {
+               const Geometry &pgeom = slider_part->get_geometry();
+               const Sides &margin = slider_part->get_margin();
+               if(dir==HORIZONTAL)
+               {
+                       slider_min_size = pgeom.w;
+                       drag_area_offset = margin.left;
+                       total_margin = margin.left+margin.right;
+               }
+               else
+               {
+                       slider_min_size = pgeom.h;
+                       drag_area_offset = margin.bottom;
+                       total_margin = margin.bottom+margin.top;
+               }
+       }
+
+       on_size_change();
+}
+
+
+Slider::Loader::Loader(Slider &s):
+       DataFile::DerivedObjectLoader<Slider, Widget::Loader>(s)
+{
+       add("range", &Slider::min, &Slider::max);
+       add("step",  &Slider::step);
+       add("page_size", &Slider::page_size);
+       add("value", &Slider::value);
 }
 
 } // namespace GLtk