X-Git-Url: http://git.tdb.fi/?a=blobdiff_plain;f=source%2Fslider.cpp;h=b860d7d8410af507729487bfc45723eb804b20e1;hb=aa9b8db38efb9e97460c76e27cecc4d1591b23e5;hp=e7f67c111016cd87b3eb348883e4788292b1bb97;hpb=c1f038acb91eb3bfaa34dfd4729d19ed3f871a42;p=libs%2Fgltk.git

diff --git a/source/slider.cpp b/source/slider.cpp
index e7f67c1..b860d7d 100644
--- a/source/slider.cpp
+++ b/source/slider.cpp
@@ -1,29 +1,188 @@
+#include <msp/gl/matrix.h>
+#include <msp/gl/meshbuilder.h>
+#include "graphic.h"
+#include "part.h"
 #include "slider.h"
+#include "style.h"
 
 namespace Msp {
 namespace GLtk {
 
-Slider::Slider(const Resources &r):
-	Widget(r),
-	min(0),
-	max(1),
-	value(0),
-	step(0.1)
-{
-}
+Slider::Slider(Direction d):
+	dir(d)
+{ }
 
 void Slider::set_value(double v)
 {
+	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;
+		double steps = round((v-min)/step);
+		value = min+steps*step;
+	}
+
+	if(value!=old_value)
+	{
+		signal_value_changed.emit(value);
+		mark_rebuild();
+	}
+}
+
+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::set_page_size(double p)
+{
+	page_size = p;
+	mark_rebuild();
+}
+
+void Slider::autosize_special(const Part &part, Geometry &ageom) const
+{
+	if(part.get_name()=="slider")
+	{
+		const Sides &margin = part.get_margin();
+		const Geometry &pgeom = part.get_geometry();
+		ageom.w = std::max(ageom.w, pgeom.w*(dir==HORIZONTAL)/2+margin.left+margin.right);
+		ageom.h = std::max(ageom.h, pgeom.h*(dir==VERTICAL)/2+margin.top+margin.bottom);
+	}
+}
+
+void Slider::rebuild_special(const Part &part)
+{
+	if(part.get_name()=="slider")
+	{
+		const Graphic *graphic = part.get_graphic(state);
+		if(!graphic || !graphic->get_texture())
+			return;
+
+		float pos_fraction = ((max>min) ? (value-min)/(max-min) : 0);
+		float fill_fraction = ((max>min) ? page_size/(max-min+page_size) : 1);
+
+		Alignment align = part.get_alignment();
+		Geometry sgeom = geom;
+		if(dir==HORIZONTAL)
+		{
+			align.x = pos_fraction;
+			sgeom.w = std::max(slider_min_size+total_margin, static_cast<unsigned>(sgeom.w*fill_fraction));
+		}
+		else
+		{
+			align.y = pos_fraction;
+			sgeom.h = std::max(slider_min_size+total_margin, static_cast<unsigned>(sgeom.h*fill_fraction));
+		}
+
+		sgeom.x = static_cast<unsigned>((geom.w-sgeom.w)*pos_fraction);
+		sgeom.y = static_cast<unsigned>((geom.h-sgeom.h)*pos_fraction);
+
+		Geometry rgeom = part.get_geometry();
+		align.apply(rgeom, sgeom, part.get_margin());
+		slider_size = (dir==HORIZONTAL ? rgeom.w : rgeom.h);
+
+		GL::MeshBuilder bld(part_cache.create_mesh(part, *graphic->get_texture()));
+		bld.transform(GL::Matrix::translation(sgeom.x+rgeom.x, sgeom.y+rgeom.y, 0));
+		graphic->build(rgeom.w, rgeom.h, bld);
 	}
 }
 
+void Slider::button_press(int x, int y, unsigned btn)
+{
+	if(btn!=1)
+		return;
+
+	int p = (dir==HORIZONTAL ? x : y);
+
+	p -= drag_area_offset;
+	if(p<0 || p>=static_cast<int>(drag_area_size))
+		return;
+
+	int sp = static_cast<int>((drag_area_size-slider_size)*(value-min)/(max-min));
+	if(p<sp)
+		set_value(value-page_size);
+	else if(p>=static_cast<int>(sp+slider_size))
+		set_value(value+page_size);
+	else
+	{
+		dragging = true;
+		drag_start_pos = p;
+		drag_start_value = value;
+		set_state(ACTIVE);
+	}
+}
+
+void Slider::button_release(int, int, unsigned btn)
+{
+	if(btn==1 && dragging)
+	{
+		dragging = false;
+		clear_state(ACTIVE);
+	}
+}
+
+void Slider::pointer_motion(int x, int y)
+{
+	if(dragging && max>min)
+	{
+		int p = (dir==HORIZONTAL ? x : y);
+		set_value(drag_start_value+(p-drag_start_pos)*(max-min)/(drag_area_size-slider_size));
+	}
+}
+
+void Slider::on_size_change()
+{
+	drag_area_size = (dir==HORIZONTAL ? geom.w : geom.h)-total_margin;
+}
+
+void Slider::on_style_change()
+{
+	if(!style)
+		return;
+
+	if(const Part *slider_part = style->find_part("slider"))
+	{
+		const Geometry &pgeom = slider_part->get_geometry();
+		const Sides &margin = slider_part->get_margin();
+		if(dir==HORIZONTAL)
+		{
+			slider_min_size = pgeom.w;
+			drag_area_offset = margin.left;
+			total_margin = margin.left+margin.right;
+		}
+		else
+		{
+			slider_min_size = pgeom.h;
+			drag_area_offset = margin.bottom;
+			total_margin = margin.bottom+margin.top;
+		}
+	}
+
+	on_size_change();
+}
+
+
+Slider::Loader::Loader(Slider &s):
+	DataFile::DerivedObjectLoader<Slider, Widget::Loader>(s)
+{
+	add("range", &Slider::min, &Slider::max);
+	add("step",  &Slider::step);
+	add("page_size", &Slider::page_size);
+	add("value", &Slider::value);
+}
+
 } // namespace GLtk
 } // namespace Msp