Add a signal to notify when the automatic size of a widget changes

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

diff --git a/source/vslider.cpp b/source/vslider.cpp
index 0b5dd0ca1efe54cb178a4a4959b04215a0b78496..874c38346c9e75a496058540ce1ec5b399685ec1 100644 (file)
--- a/source/vslider.cpp
+++ b/source/vslider.cpp
@@ -1,7 +1,7 @@
 /* $Id$
 
 This file is part of libmspgltk
-Copyright © 2007  Mikko Rasa, Mikkosoft Productions
+Copyright © 2007-2008, 2010-2011  Mikko Rasa, Mikkosoft Productions
 Distributed under the LGPL
 */
 
@@ -15,10 +15,42 @@ Distributed under the LGPL
 namespace Msp {
 namespace GLtk {
 
-VSlider::VSlider(const Resources &r):
-       Slider(r)
+VSlider::VSlider():
+       slider_size(1)
+{ }
+
+void VSlider::autosize()
 {
-       update_style();
+       if(!style)
+               return;
+
+       Widget::autosize();
+
+       if(const Part *slider_part = style->get_part("slider"))
+       {
+               const Sides &margin = slider_part->get_margin();
+               const Geometry &pgeom = slider_part->get_geometry();
+               geom.w = std::max(geom.w, pgeom.w+margin.left+margin.right);
+               geom.h = std::max(geom.h, pgeom.h*3/2+margin.top+margin.bottom);
+       }
+}
+
+void VSlider::render_special(const Part &part) const
+{
+       if(part.get_name()=="slider")
+       {
+               Alignment align = part.get_alignment();
+               if(max>min)
+                       align.y = (value-min)/(max-min);
+
+               Geometry pgeom = part.get_geometry();
+               align.apply(pgeom, geom, part.get_margin());
+
+               GL::push_matrix();
+               GL::translate(pgeom.x, pgeom.y, 0);
+               part.get_graphic(state)->render(pgeom.w, pgeom.h);
+               GL::pop_matrix();
+       }
 }
 
 void VSlider::button_press(int x, int y, unsigned btn)
@@ -47,24 +79,6 @@ void VSlider::pointer_motion(int, int y)
                drag(y);
 }
 
-void VSlider::render_special(const Part &part) const
-{
-       if(part.get_name()=="slider")
-       {
-               Alignment align = part.get_alignment();
-               if(max>min)
-                       align.y = (value-min)/(max-min);
-
-               Geometry pgeom = part.get_geometry();
-               align.apply(pgeom, geom, part.get_margin());
-
-               GL::push_matrix();
-               GL::translate(pgeom.x, pgeom.y, 0);
-               part.get_graphic(state)->render(pgeom.w, pgeom.h);
-               GL::pop_matrix();
-       }
-}
-
 void VSlider::on_geometry_change()
 {
        drag_area_size = geom.h-slider_size;
@@ -72,6 +86,9 @@ void VSlider::on_geometry_change()
 
 void VSlider::on_style_change()
 {
+       if(!style)
+               return;
+
        if(const Part *slider_part = style->get_part("slider"))
                slider_size = slider_part->get_geometry().h;