From 1681d7dadff09e071c4f79954a90969fb7815210 Mon Sep 17 00:00:00 2001
From: Andreas Monzner <andreas.monzner@multimedia-labs.de>
Date: Wed, 25 Jan 2006 12:09:25 +0000
Subject: [PATCH 1/1] add selchanged signal to listbox

---
 lib/gui/elistbox.cpp             | 15 ++++++++-------
 lib/gui/elistbox.h               |  3 ++-
 lib/python/Components/EpgList.py | 22 +++++++++++++++++++++-
 lib/python/enigma_python.i       |  1 +
 4 files changed, 32 insertions(+), 9 deletions(-)

diff --git a/lib/gui/elistbox.cpp b/lib/gui/elistbox.cpp
index a5d18e6b..f1efadfd 100644
--- a/lib/gui/elistbox.cpp
+++ b/lib/gui/elistbox.cpp
@@ -8,7 +8,7 @@ eListbox::eListbox(eWidget *parent)
 	,m_content_changed(false), m_top(0), m_selected(0), m_itemheight(25)
 	,m_items_per_page(0), m_selection_enabled(1), m_scrollbar(NULL)
 {
-	setContent(new eListboxStringContent());
+//	setContent(new eListboxStringContent());
 
 	ePtr<eActionMap> ptr;
 	eActionMap::getInstance(ptr);
@@ -48,10 +48,13 @@ void eListbox::setScrollbarMode(int mode)
 
 void eListbox::setContent(iListboxContent *content)
 {
+	int oldsel = m_selected;
 	m_content = content;
 	if (content)
 		m_content->setListbox(this);
 	entryReset();
+	if (oldsel == m_selected)
+		/* emit */ selectionChanged();
 }
 
 void eListbox::moveSelection(int dir)
@@ -59,15 +62,12 @@ void eListbox::moveSelection(int dir)
 		/* refuse to do anything without a valid list. */
 	if (!m_content)
 		return;
-	
 		/* if our list does not have one entry, don't do anything. */
 	if (!m_items_per_page)
 		return;
-		
 		/* we need the old top/sel to see what we have to redraw */
 	int oldtop = m_top;
 	int oldsel = m_selected;
-	
 		/* first, move cursor */
 	switch (dir)
 	{
@@ -128,7 +128,6 @@ void eListbox::moveSelection(int dir)
 	
 		/* now, look wether the current selection is out of screen */
 	m_selected = m_content->cursorGet();
-
 	while (m_selected < m_top)
 	{
 		m_top -= m_items_per_page;
@@ -139,14 +138,16 @@ void eListbox::moveSelection(int dir)
 		/* m_top should be always valid here as it's selected */
 		m_top += m_items_per_page;
 
+	if (oldsel != m_selected)
+		/* emit */ selectionChanged();
+
 	updateScrollBar();
 
 	if (m_top != oldtop)
 		invalidate();
 	else if (m_selected != oldsel)
 	{
-		
-			/* redraw the old and newly selected */
+   /* redraw the old and newly selected */
 		gRegion inv = eRect(0, m_itemheight * (m_selected-m_top), size().width(), m_itemheight);
 		inv |= eRect(0, m_itemheight * (oldsel-m_top), size().width(), m_itemheight);
 		
diff --git a/lib/gui/elistbox.h b/lib/gui/elistbox.h
index df1c6915..87013bc1 100644
--- a/lib/gui/elistbox.h
+++ b/lib/gui/elistbox.h
@@ -57,6 +57,8 @@ public:
 	eListbox(eWidget *parent);
 	~eListbox();
 
+	PSignal0<void> selectionChanged;
+
 	enum {
 		showOnDemand,
 		showAlways,
@@ -90,7 +92,6 @@ public:
 	
 	void setItemHeight(int h);
 	void setSelectionEnable(int en);
-
 #ifndef SWIG
 		/* entryAdded: an entry was added *before* the given index. it's index is the given number. */
 	void entryAdded(int index);
diff --git a/lib/python/Components/EpgList.py b/lib/python/Components/EpgList.py
index 26d712e6..cc5bc619 100644
--- a/lib/python/Components/EpgList.py
+++ b/lib/python/Components/EpgList.py
@@ -42,7 +42,10 @@ class Rect:
 		return self.__width
 
 class EPGList(HTMLComponent, GUIComponent):
-	def __init__(self, type=EPG_TYPE_SINGLE):
+	def __init__(self, type=EPG_TYPE_SINGLE, selChangedCB=None):
+		self.onSelChanged = [ ]
+		if selChangedCB is not None:
+			self.onSelChanged.append(selChangedCB)
 		GUIComponent.__init__(self)
 		self.type=type
 		if type == EPG_TYPE_SINGLE and SINGLE_CPP > 0:
@@ -78,8 +81,24 @@ class EPGList(HTMLComponent, GUIComponent):
 	def moveDown(self):
 		self.instance.moveSelection(self.instance.moveDown)
 
+	def connectSelectionChanged(func):
+		if not self.onSelChanged.count(func):
+			self.onSelChanged.append(func)
+
+	def disconnectSelectionChanged(func):
+		self.onSelChanged.remove(func)
+
+	def selectionChanged(self):
+		for x in self.onSelChanged:
+			if x is not None:
+				try:
+					x()
+				except:
+					pass
+
 	def GUIcreate(self, parent):
 		self.instance = eListbox(parent)
+		self.instance.selectionChanged.get().append(self.selectionChanged)
 		self.instance.setContent(self.l)
 		if SINGLE_CPP > 0:
 			self.instance.setItemHeight(25)
@@ -191,6 +210,7 @@ class EPGList(HTMLComponent, GUIComponent):
 			cnt+=1
 		self.l.setList(self.list)
 		print time() - t
+		self.selectionChanged()
 
 	def fillSingleEPG(self, service):
 		t = time()
diff --git a/lib/python/enigma_python.i b/lib/python/enigma_python.i
index 53238e4a..35290230 100644
--- a/lib/python/enigma_python.i
+++ b/lib/python/enigma_python.i
@@ -144,6 +144,7 @@ typedef long time_t;
 %immutable eComponentScan::statusChanged;
 %immutable eComponentScan::newService;
 %immutable pNavigation::m_event;
+%immutable eListbox::selectionChanged;
 
 %include <lib/gdi/font.h>
 %include <lib/gdi/gpixmap.h>
-- 
2.30.2