From 3f301f9b6f73e886bdbb61565edb2c02667039d0 Mon Sep 17 00:00:00 2001
From: Mikko Rasa <tdb@tdb.fi>
Date: Fri, 26 Feb 2010 10:50:57 +0000
Subject: [PATCH] Allow custom tooltips at empty areas of a Root Fix some bugs

---
 source/container.cpp |  4 ++-
 source/root.cpp      | 74 +++++++++++++++++++++++---------------------
 source/root.h        |  3 ++
 3 files changed, 45 insertions(+), 36 deletions(-)

diff --git a/source/container.cpp b/source/container.cpp
index a755644..a46492d 100644
--- a/source/container.cpp
+++ b/source/container.cpp
@@ -67,7 +67,9 @@ Widget *Container::get_descendant_at(int x, int y)
 	if(Container *cont=dynamic_cast<Container *>(wdg))
 	{
 		const Geometry &cgeom=wdg->get_geometry();
-		return cont->get_descendant_at(x-cgeom.x, y-cgeom.y);
+		Widget *wdg2=cont->get_descendant_at(x-cgeom.x, y-cgeom.y);
+		if(wdg2)
+			return wdg2;
 	}
 	return wdg;
 }
diff --git a/source/root.cpp b/source/root.cpp
index 0cd7e0f..9fc48e0 100644
--- a/source/root.cpp
+++ b/source/root.cpp
@@ -37,37 +37,45 @@ void Root::tick()
 {
 	if(tooltip_timeout && Time::now()>tooltip_timeout)
 	{
+		std::string tip;
 		if(Widget *wdg=get_descendant_at(pointer_x, pointer_y))
 		{
-			const std::string &tip=wdg->get_tooltip();
-			if(!tip.empty())
+			tip=wdg->get_tooltip();
+			tooltip_target=wdg;
+		}
+		else
+		{
+			tip=signal_tooltip.emit(pointer_x, pointer_y);
+			tooltip_target=this;
+		}
+
+		if(!tip.empty())
+		{
+			if(!lbl_tooltip)
 			{
-				if(!lbl_tooltip)
-				{
-					lbl_tooltip=new Label(res);
-					add(*lbl_tooltip);
-					lbl_tooltip->set_style("tooltip");
-				}
-
-				lbl_tooltip->set_text(tip);
-				lbl_tooltip->autosize();
-				const Geometry &tip_geom=lbl_tooltip->get_geometry();
-				unsigned x=pointer_x+10;
-				unsigned y=pointer_y-10-lbl_tooltip->get_geometry().h;
-				if(x+tip_geom.w>geom.w)
-				{
-					if(pointer_x>static_cast<int>(tip_geom.w+2))
-						x=pointer_x-2-tip_geom.w;
-					else
-						x=geom.w-tip_geom.w;
-				}
-				lbl_tooltip->set_position(x, y);
-				raise(*lbl_tooltip);
-				lbl_tooltip->set_visible(true);
-				tooltip_timeout=Time::TimeStamp();
-				tooltip_target=wdg;
+				lbl_tooltip=new Label(res);
+				add(*lbl_tooltip);
+				lbl_tooltip->set_style("tooltip");
 			}
+
+			lbl_tooltip->set_text(tip);
+			lbl_tooltip->autosize();
+			const Geometry &tip_geom=lbl_tooltip->get_geometry();
+			unsigned x=pointer_x+10;
+			unsigned y=pointer_y-10-lbl_tooltip->get_geometry().h;
+			if(x+tip_geom.w>geom.w)
+			{
+				if(pointer_x>static_cast<int>(tip_geom.w+2))
+					x=pointer_x-2-tip_geom.w;
+				else
+					x=geom.w-tip_geom.w;
+			}
+			lbl_tooltip->set_position(x, y);
+			raise(*lbl_tooltip);
+			lbl_tooltip->set_visible(true);
 		}
+
+		tooltip_timeout=Time::TimeStamp();
 	}
 }
 
@@ -98,18 +106,14 @@ void Root::pointer_motion_event(int x, int y)
 
 		if(!tooltip_target)
 		{
-			if(pointer_focus)
-			{
-				pointer_x=x;
-				pointer_y=y;
-				tooltip_timeout=Time::now()+700*Time::msec;
-			}
-			else
-				tooltip_timeout=Time::TimeStamp();
+			pointer_x=x;
+			pointer_y=y;
+			tooltip_timeout=Time::now()+700*Time::msec;
 		}
 		else if(get_descendant_at(x, y)!=tooltip_target)
 		{
-			lbl_tooltip->set_visible(false);
+			if(lbl_tooltip)
+				lbl_tooltip->set_visible(false);
 			tooltip_target=0;
 		}
 	}
diff --git a/source/root.h b/source/root.h
index 7cbd827..50445fe 100644
--- a/source/root.h
+++ b/source/root.h
@@ -26,6 +26,9 @@ rendered to fill the window in order to get coordinates mapped correctly.
 */
 class Root: public Panel, public sigc::trackable
 {
+public:
+	sigc::signal<std::string, int, int> signal_tooltip;
+
 private:
 	Graphics::Window &window;
 	Label *lbl_tooltip;
-- 
2.43.0