X-Git-Url: http://git.tdb.fi/?a=blobdiff_plain;f=source%2Fpanel.cpp;h=dc2808ed4bf5a237d97aad9cd1ec75e068ac7580;hb=10c448468c4e225fab701e69bdc296422bb3f509;hp=f1eef110848abed72e114742ea2ff24b6e2ead11;hpb=707b59d45ae50b69c94918f8f74313283b304597;p=libs%2Fgltk.git

diff --git a/source/panel.cpp b/source/panel.cpp
index f1eef11..dc2808e 100644
--- a/source/panel.cpp
+++ b/source/panel.cpp
@@ -26,7 +26,9 @@ namespace GLtk {
 
 Panel::Panel():
 	layout(0)
-{ }
+{
+	input_type = INPUT_NAVIGATION;
+}
 
 Panel::~Panel()
 {
@@ -57,6 +59,95 @@ void Panel::render_special(const Part &part, GL::Renderer &renderer) const
 	}
 }
 
+bool Panel::navigate(Navigation nav)
+{
+	if(Container::navigate(nav))
+		return true;
+
+	if(nav==NAV_UP || nav==NAV_DOWN || nav==NAV_LEFT || nav==NAV_RIGHT)
+	{
+		int nav_x = (nav==NAV_RIGHT ? 1 : nav==NAV_LEFT ? -1 : 0);
+		int nav_y = (nav==NAV_UP ? 1 : nav==NAV_DOWN ? -1 : 0);
+
+		int origin_x, origin_y, origin_dim;
+		if(input_focus)
+		{
+			const Geometry &fgeom = input_focus->get_geometry();
+			origin_x = fgeom.x+(nav_x*0.5+0.5)*fgeom.w;
+			origin_y = fgeom.y+(nav_y*0.5+0.5)*fgeom.h;
+			origin_dim = abs(nav_x)*fgeom.h+abs(nav_y)*fgeom.w;
+		}
+		else
+		{
+			origin_x = geom.w*(0.5-nav_x*0.5);
+			origin_y = geom.h*(0.5-nav_y*0.5);
+			origin_dim = abs(nav_x)*geom.h+abs(nav_y)*geom.w;
+		}
+
+		Widget *sibling = find_next_child(origin_x, origin_y, origin_dim, nav_x, nav_y);
+		if(!sibling && input_focus)
+		{
+			const Geometry &fgeom = input_focus->get_geometry();
+			origin_x -= fgeom.w*(nav_x*0.5);
+			origin_y -= fgeom.h*(nav_y*0.5);
+			sibling = find_next_child(origin_x, origin_y, origin_dim, nav_x, nav_y);
+		}
+
+		if(sibling)
+		{
+			set_input_focus(sibling);
+			if(Panel *panel = dynamic_cast<Panel *>(sibling))
+				panel->navigate(nav);
+			return true;
+		}
+	}
+
+	return false;
+}
+
+Widget *Panel::find_next_child(int origin_x, int origin_y, int origin_dim, int nav_x, int nav_y) const
+{
+	Widget *sibling = 0;
+	int best_score = 0;
+	for(list<Child *>::const_iterator i=children.begin(); i!=children.end(); ++i)
+	{
+		if((*i)->widget==input_focus || !(*i)->widget->is_focusable())
+			continue;
+
+		const Geometry &cgeom = (*i)->widget->get_geometry();
+		int dx = compute_delta(cgeom.x, cgeom.w, origin_x, origin_dim, nav_x);
+		int dy = compute_delta(cgeom.y, cgeom.h, origin_y, origin_dim, nav_y);
+
+		int score = -1;
+		if(nav_y && nav_y*dy>=0)
+			score = nav_y*dy+abs(dx)*4;
+		else if(nav_x && nav_x*dx>=0)
+			score = nav_x*dx+abs(dy)*4;
+
+		if(score>=0 && (!sibling || score<best_score))
+		{
+			sibling = (*i)->widget;
+			best_score = score;
+		}
+	}
+
+	return sibling;
+}
+
+int Panel::compute_delta(int pos, int dim, int origin_pos, int origin_dim, int nav)
+{
+	if(nav<0)
+		return pos+dim-origin_pos;
+	else if(nav>0)
+		return pos-origin_pos;
+	else if(pos+dim<origin_pos-origin_dim/2)
+		return pos+dim+origin_dim/2-origin_pos;
+	else if(pos>origin_pos+origin_dim/2)
+		return pos-origin_pos-origin_dim/2;
+	else
+		return 0;
+}
+
 void Panel::on_geometry_change()
 {
 	if(layout)