X-Git-Url: http://git.tdb.fi/?a=blobdiff_plain;f=source%2Fslider.cpp;h=3392ac4a1e83ce1f84b6e047abebf9d33a6e0c4e;hb=2bdaf4955fdb94e73704adcdcf0adc2b353f0ff0;hp=0b1d8b066ee2e992644d9cc0254dc672a6ac8db5;hpb=8f6f543758fb1b2b17ae2db519198d420eb9982d;p=libs%2Fgltk.git

diff --git a/source/slider.cpp b/source/slider.cpp
index 0b1d8b0..3392ac4 100644
--- a/source/slider.cpp
+++ b/source/slider.cpp
@@ -10,26 +10,27 @@ Distributed under the LGPL
 namespace Msp {
 namespace GLtk {
 
-Slider::Slider(const Resources &r):
-	Widget(r),
+Slider::Slider():
 	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;
+	double old_value = value;
 
 	if(v<min)
-		value=min;
+		value = min;
 	else if(v>max)
-		value=max;
+		value = max;
 	else
 	{
-		unsigned steps=static_cast<unsigned>((v-min)/step+0.5);
-		value=min+steps*step;
+		unsigned steps = static_cast<unsigned>((v-min)/step+0.5);
+		value = min+steps*step;
 	}
 
 	if(value!=old_value)
@@ -38,17 +39,37 @@ void Slider::set_value(double v)
 
 void Slider::set_range(double a, double b)
 {
-	min=a;
-	max=b;
+	min = a;
+	max = b;
 	set_value(value);
 }
 
 void Slider::set_step(double s)
 {
-	step=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)