Change State into a bitmask to allow more fine-grained control of styles

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

diff --git a/source/slider.cpp b/source/slider.cpp
index cb24c002b1a497bb5502f81bb566a434d5abd3c6..ead5664a303fae8e88ac26c9e0967629a5b02ceb 100644 (file)
--- a/source/slider.cpp
+++ b/source/slider.cpp
@@ -1,3 +1,10 @@
+/* $Id$
+
+This file is part of libmspgltk
+Copyright © 2007  Mikko Rasa, Mikkosoft Productions
+Distributed under the LGPL
+*/
+
 #include "slider.h"
 
 namespace Msp {
@@ -8,12 +15,15 @@ Slider::Slider(const Resources &r):
        min(0),
        max(1),
        value(0),
-       step(0.1)
-{
-}
+       step(0.1),
+       dragging(false),
+       drag_area_size(0)
+{ }
 
 void Slider::set_value(double v)
 {
+       double old_value=value;
+
        if(v<min)
                value=min;
        else if(v>max)
@@ -24,7 +34,55 @@ void Slider::set_value(double v)
                value=min+steps*step;
        }
 
-       signal_value_changed.emit(value);
+       if(value!=old_value)
+               signal_value_changed.emit(value);
+}
+
+void Slider::set_range(double a, double b)
+{
+       min=a;
+       max=b;
+       set_value(value);
+}
+
+void Slider::set_step(double s)
+{
+       step=s;
+       set_value(value);
+}
+
+void Slider::start_drag(int p)
+{
+       dragging=true;
+       drag_start_pos=p;
+       drag_start_value=value;
+       state|=ACTIVE;
+}
+
+void Slider::drag(int p)
+{
+       if(max>min)
+               set_value(drag_start_value+(p-drag_start_pos)*(max-min)/drag_area_size);
+}
+
+void Slider::end_drag()
+{
+       dragging=false;
+       state&=~ACTIVE;
+}
+
+
+Slider::Loader::Loader(Slider &s):
+       Widget::Loader(s)
+{
+       add("range", &Slider::min, &Slider::max);
+       add("step",  &Slider::step);
+       add("value", &Slider::value);
+}
+
+Slider &Slider::Loader::get_object() const
+{
+       return static_cast<Slider &>(wdg);
 }
 
 } // namespace GLtk