Properly account for margins in sliders

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

diff --git a/source/vslider.cpp b/source/vslider.cpp
index 4776e674a809b679e9bb7c0af6df48e3b400d8df..6bc1553ded3ad8df6f9e5e24eeeb48f582a1f3de 100644 (file)
--- a/source/vslider.cpp
+++ b/source/vslider.cpp
@@ -8,7 +8,8 @@
 namespace Msp {
 namespace GLtk {
 
-VSlider::VSlider()
+VSlider::VSlider():
+       total_margin(0)
 { }
 
 void VSlider::autosize_special(const Part &part, Geometry &ageom) const
@@ -63,7 +64,7 @@ void VSlider::pointer_motion(int, int y)
 
 void VSlider::on_geometry_change()
 {
-       drag_area_size = geom.h-slider_size;
+       drag_area_size = geom.h-total_margin;
 }
 
 void VSlider::on_style_change()
@@ -72,7 +73,12 @@ void VSlider::on_style_change()
                return;
 
        if(const Part *slider_part = style->get_part("slider"))
+       {
                slider_size = slider_part->get_geometry().h;
+               const Sides &margin = slider_part->get_margin();
+               drag_area_offset = margin.bottom;
+               total_margin = margin.bottom+margin.top;
+       }
 
        on_geometry_change();
 }