Rework event passing system to allow for pointer grabs

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

diff --git a/source/hslider.cpp b/source/hslider.cpp
index c1d334d3d3cbff366b37b59bae72ee63fbf7e40c..dda8b43168643a74825480c72e3017891adce8fd 100644 (file)
--- a/source/hslider.cpp
+++ b/source/hslider.cpp
@@ -1,23 +1,76 @@
+#include <msp/gl/matrix.h>
+#include <msp/gl/transform.h>
+#include "graphic.h"
 #include "hslider.h"
+#include "part.h"
+#include "style.h"
 
 namespace Msp {
 namespace GLtk {
 
 HSlider::HSlider(const Resources &r):
-       Slider(r)
+       Slider(r),
+       dragging(false)
 {
+       update_style();
 }
 
-void HSlider::render_part(const Part &part)
+void HSlider::button_press(int x, int y, unsigned btn)
+{
+       if(geom.is_inside(x, y))
+       {
+               int sw=get_slider_width();
+               int sx=static_cast<int>((geom.w-sw)*(value-min)/(max-min));
+               if(btn==1 && x>=sx && x<sx+sw)
+               {
+                       dragging=true;
+                       state=ACTIVE;
+                       drag_start_x=x;
+                       drag_start_value=value;
+               }
+       }
+}
+
+void HSlider::button_release(int, int, unsigned btn)
+{
+       if(btn==1)
+       {
+               dragging=false;
+               state=NORMAL;
+       }
+}
+
+void HSlider::pointer_motion(int x, int)
+{
+       if(dragging)
+       {
+               set_value(drag_start_value+(x-drag_start_x)*(max-min)/(geom.w-get_slider_width()));
+       }
+}
+
+void HSlider::render_part(const Part &part) const
 {
        if(part.get_name()=="slider")
        {
+               unsigned gw=part.get_width();
+               unsigned gh=(part.get_fill_y() ? geom.h : part.get_height());
+               GL::push_matrix();
+               GL::translate((geom.w-gw)*(value-min)/(max-min), (geom.h-gh)*(part.get_alignment().y+1)/2, 0);
                const Graphic *graphic=part.get_graphic(state);
-               const Graphic::Sides &shadow=graphic->get_shadow();
-               unsigned gw=graphic->get_slice().w-shadow.left-shadow.right;
-               unsigned gh=(part.get_fill_x() ? geom.h, graphic->get_slice().h)-shadow.bottom-shadow.top;
-               GL::translate((geom.w-gw)*(value-min)/(max-min), part.get_alignment().y
+               graphic->render(gw, gh);
+               GL::pop_matrix();
        }
+       else
+               Widget::render_part(part);
+}
+
+unsigned HSlider::get_slider_width() const
+{
+       for(PartSeq::const_iterator i=style->get_parts().begin(); i!=style->get_parts().end(); ++i)
+               if(i->get_name()=="slider")
+                       return i->get_width();
+
+       return 0;
 }
 
 } // namespace GLtk