From: Mikko Rasa <tdb@tdb.fi>
Date: Fri, 19 Dec 2014 12:05:47 +0000 (+0200)
Subject: Add a dedicated exception class for unavailable input devices
X-Git-Url: http://git.tdb.fi/?p=libs%2Fgui.git;a=commitdiff_plain;h=e217a93d59aecfa80eec8bfa16b3976abdceca81

Add a dedicated exception class for unavailable input devices
---

diff --git a/source/input/device.h b/source/input/device.h
index 7df388b..b42ed3f 100644
--- a/source/input/device.h
+++ b/source/input/device.h
@@ -3,11 +3,20 @@
 
 #include <string>
 #include <vector>
+#include <stdexcept>
 #include <sigc++/signal.h>
 
 namespace Msp {
 namespace Input {
 
+class device_not_available: public std::runtime_error
+{
+public:
+	device_not_available(const std::string &w): std::runtime_error(w) { }
+	virtual ~device_not_available() throw() { }
+};
+
+
 /**
 Base class for input devices.  Input devices have two types of controls:
 buttons and axes.  Buttons are either on or off.  Axes have a floating point
diff --git a/source/input/generic/gamecontroller.cpp b/source/input/generic/gamecontroller.cpp
index b320342..9ba7130 100644
--- a/source/input/generic/gamecontroller.cpp
+++ b/source/input/generic/gamecontroller.cpp
@@ -8,7 +8,7 @@ namespace Input {
 
 GameController::GameController(unsigned)
 {
-	throw runtime_error("not supported");
+	throw device_not_available("GameController");
 }
 
 GameController::~GameController()
diff --git a/source/input/touchscreen.cpp b/source/input/touchscreen.cpp
index 4facb8c..c4de688 100644
--- a/source/input/touchscreen.cpp
+++ b/source/input/touchscreen.cpp
@@ -9,7 +9,7 @@ Touchscreen::Touchscreen(Graphics::Window &w):
 	window(w)
 {
 	if(!is_available())
-		throw runtime_error("touchscreen not available");
+		throw device_not_available("Touchscreen");
 
 	name = "Touchscreen";