From aba0416fb73e17d068b30ff163c2fedcb0254da2 Mon Sep 17 00:00:00 2001
From: Mikko Rasa <tdb@tdb.fi>
Date: Sat, 16 Aug 2008 12:35:31 +0000
Subject: [PATCH] Add Widget::set_focus Add Entry::signal_enter Make Panel
 throw on an attempt to handle a widget which is not in it

---
 source/entry.cpp  |  2 ++
 source/entry.h    |  2 ++
 source/panel.cpp  | 47 +++++++++++++++++++++++++++++------------------
 source/panel.h    |  7 ++++---
 source/widget.cpp | 10 ++++++++++
 source/widget.h   |  1 +
 6 files changed, 48 insertions(+), 21 deletions(-)

diff --git a/source/entry.cpp b/source/entry.cpp
index 7f50ed0..523fea5 100644
--- a/source/entry.cpp
+++ b/source/entry.cpp
@@ -52,6 +52,8 @@ void Entry::key_press(unsigned key, unsigned, wchar_t ch)
 		if(edit_pos>0)
 			text.erase(--edit_pos, 1);
 	}
+	else if(key==Input::KEY_ENTER)
+		signal_enter.emit();
 	else if(ch>=' ')
 	{
 		text.insert(edit_pos, Codecs::encode<Codecs::Utf8>(Codecs::ustring(1, ch)));
diff --git a/source/entry.h b/source/entry.h
index e5f3fd8..29fec41 100644
--- a/source/entry.h
+++ b/source/entry.h
@@ -35,6 +35,8 @@ private:
 	unsigned edit_pos;
 
 public:
+	sigc::signal<void> signal_enter;
+
 	Entry(const Resources &, const std::string & =std::string());
 
 	void set_text(const std::string &);
diff --git a/source/panel.cpp b/source/panel.cpp
index ac277a9..3123db4 100644
--- a/source/panel.cpp
+++ b/source/panel.cpp
@@ -48,27 +48,27 @@ void Panel::add(Widget &wdg)
 
 void Panel::remove(Widget &wdg)
 {
-	ChildSeq::iterator i=find(children.begin(), children.end(), &wdg);
-	if(i!=children.end())
-	{
-		if(&wdg==pointer_focus)
-			set_pointer_focus(0, 0);
-		if(&wdg==input_focus)
-			set_input_focus(0);
+	list<Widget *>::iterator i=find(children.begin(), children.end(), &wdg);
+	if(i==children.end())
+		throw InvalidState("That Widget is not in this Panel");
 
-		set_parent(wdg, 0);
-		children.erase(i);
-	}
+	if(&wdg==pointer_focus)
+		set_pointer_focus(0, 0);
+	if(&wdg==input_focus)
+		set_input_focus(0);
+
+	set_parent(wdg, 0);
+	children.erase(i);
 }
 
 void Panel::raise(Widget &wdg)
 {
-	ChildSeq::iterator i=find(children.begin(), children.end(), &wdg);
-	if(i!=children.end())
-	{
-		children.erase(i);
-		children.push_back(&wdg);
-	}
+	list<Widget *>::iterator i=find(children.begin(), children.end(), &wdg);
+	if(i==children.end())
+		throw InvalidState("That Widget is not in this Panel");
+
+	children.erase(i);
+	children.push_back(&wdg);
 }
 
 void Panel::button_press(int x, int y, unsigned btn)
@@ -174,11 +174,22 @@ void Panel::ungrab_pointer(Widget &wdg)
 		throw Exception("Someone is trying to steal the pointer!");
 }
 
+void Panel::grab_focus(Widget &wdg)
+{
+	list<Widget *>::iterator i=find(children.begin(), children.end(), &wdg);
+	if(i==children.end())
+		throw InvalidState("That Widget is not in this Panel");
+	
+	set_input_focus(&wdg);
+	if(parent)
+		parent->grab_focus(*this);
+}
+
 void Panel::render_special(const Part &part) const
 {
 	if(part.get_name()=="children")
 	{
-		for(ChildSeq::const_iterator i=children.begin(); i!=children.end(); ++i)
+		for(list<Widget *>::const_iterator i=children.begin(); i!=children.end(); ++i)
 			if((*i)->is_visible())
 				(*i)->render();
 	}
@@ -219,7 +230,7 @@ void Panel::set_input_focus(Widget *wdg)
 
 Widget *Panel::get_child_at(int x, int y)
 {
-	for(ChildSeq::reverse_iterator i=children.rbegin(); i!=children.rend(); ++i)
+	for(list<Widget *>::reverse_iterator i=children.rbegin(); i!=children.rend(); ++i)
 		if((*i)->is_visible() && (*i)->get_geometry().is_inside(x, y))
 			return *i;
 
diff --git a/source/panel.h b/source/panel.h
index 529354d..397d71f 100644
--- a/source/panel.h
+++ b/source/panel.h
@@ -36,9 +36,7 @@ public:
 	};
 
 private:
-	typedef std::list<Widget *> ChildSeq;
-
-	ChildSeq children;
+	std::list<Widget *> children;
 	Widget *pointer_focus;
 	unsigned pointer_grab;
 	Widget *input_focus;
@@ -52,6 +50,7 @@ public:
 	void add(Widget &);
 	void remove(Widget &);
 	void raise(Widget &);
+	void set_focus(Widget &);
 
 	virtual void button_press(int, int, unsigned);
 	virtual void button_release(int, int, unsigned);
@@ -61,9 +60,11 @@ public:
 	virtual void key_release(unsigned, unsigned);
 	virtual void focus_out();
 
+	// These functions are not intended to be called from outside GLtk
 	void child_hidden(Widget &);
 	void grab_pointer(Widget &);
 	void ungrab_pointer(Widget &);
+	void grab_focus(Widget &);
 private:
 	virtual const char *get_class() const { return "panel"; }
 	virtual void render_special(const Part &) const;
diff --git a/source/widget.cpp b/source/widget.cpp
index efb6155..48b647b 100644
--- a/source/widget.cpp
+++ b/source/widget.cpp
@@ -69,6 +69,16 @@ void Widget::set_visible(bool v)
 		parent->child_hidden(*this);
 }
 
+void Widget::set_focus()
+{
+	if(!parent)
+		throw InvalidState("No parent");
+	if(!visible)
+		throw InvalidState("Can't set focus on invisible widget");
+
+	parent->grab_focus(*this);
+}
+
 void Widget::render() const
 {
 	if(!style)
diff --git a/source/widget.h b/source/widget.h
index 7fdc906..8663814 100644
--- a/source/widget.h
+++ b/source/widget.h
@@ -64,6 +64,7 @@ public:
 	void set_style(const std::string &);
 
 	void set_visible(bool);
+	void set_focus();
 
 	const Geometry &get_geometry() const { return geom; }
 	bool is_visible() const { return visible; }
-- 
2.45.2