Refactor all slider logic into the Slider class

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

diff --git a/source/slider.cpp b/source/slider.cpp
index 5034b2475d8c46f20e4e09f2fe626c69c196d19a..8ff342d56a81646aa6fe1786c58fcaf39a816068 100644 (file)
--- a/source/slider.cpp
+++ b/source/slider.cpp
@@ -1,9 +1,15 @@
+#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():
+Slider::Slider(Direction d):
+       dir(d),
        min(0),
        max(1),
        value(0),
@@ -11,7 +17,8 @@ Slider::Slider():
        dragging(false),
        drag_area_size(0),
        drag_area_offset(0),
-       slider_size(1)
+       slider_size(1),
+       total_margin(0)
 { }
 
 void Slider::set_value(double v)
@@ -48,8 +55,49 @@ void Slider::set_step(double s)
        set_value(value);
 }
 
-void Slider::click(int p)
+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);
+
+               Alignment align = part.get_alignment();
+               if(dir==HORIZONTAL)
+                       align.x = pos_fraction;
+               else
+                       align.y = pos_fraction;
+
+               Geometry rgeom = part.get_geometry();
+               align.apply(rgeom, geom, part.get_margin());
+
+               GL::MeshBuilder bld(part_cache.create_mesh(part, *graphic->get_texture()));
+               bld.matrix() *= GL::Matrix::translation(rgeom.x, 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;
@@ -60,27 +108,61 @@ void Slider::click(int p)
        else if(p>=static_cast<int>(sp+slider_size))
                set_value(value+step*10);
        else
-               start_drag(drag_area_offset+p);
+       {
+               dragging = true;
+               drag_start_pos = p;
+               drag_start_value = value;
+               set_state(ACTIVE);
+       }
 }
 
-void Slider::start_drag(int p)
+void Slider::button_release(int, int, unsigned btn)
 {
-       dragging = true;
-       drag_start_pos = p;
-       drag_start_value = value;
-       set_state(ACTIVE);
+       if(btn==1 && dragging)
+       {
+               dragging = false;
+               clear_state(ACTIVE);
+       }
 }
 
-void Slider::drag(int p)
+void Slider::pointer_motion(int x, int y)
 {
-       if(max>min)
+       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::end_drag()
+void Slider::on_size_change()
 {
-       dragging = false;
-       clear_state(ACTIVE);
+       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->get_part("slider"))
+       {
+               const Geometry &pgeom = slider_part->get_geometry();
+               const Sides &margin = slider_part->get_margin();
+               if(dir==HORIZONTAL)
+               {
+                       slider_size = pgeom.w;
+                       drag_area_offset = margin.left;
+                       total_margin = margin.left+margin.right;
+               }
+               else
+               {
+                       slider_size = pgeom.h;
+                       drag_area_offset = margin.bottom;
+                       total_margin = margin.bottom+margin.top;
+               }
+       }
+
+       on_size_change();
 }