Don't set platform input context if it's not properly created.

Prevent xcb applications from failing to launch when IBus is not
initialized correctly.

Change-Id: I8425403e02d0eb5401f8d8bb0d012b53ab9400d9
Reviewed-on: http://codereview.qt.nokia.com/3044
Reviewed-by: Qt Sanity Bot <qt_sanity_bot@ovi.com>
Reviewed-by: Matthew Cattell <matthew.cattell@nokia.com>

2 files changed, 7 insertions, 4 deletions

diff --git a/src/plugins/platforms/xcb/qxcbintegration.cpp b/src/plugins/platforms/xcb/qxcbintegration.cpp
index 3053cba81e..e97b9f2121 100644
--- a/src/plugins/platforms/xcb/qxcbintegration.cpp
+++ b/src/plugins/platforms/xcb/qxcbintegration.cpp
@@ -99,10 +99,14 @@ QXcbIntegration::QXcbIntegration(const QStringList &parameters)
     m_fontDatabase = new QGenericUnixFontDatabase();
     m_nativeInterface = new QXcbNativeInterface;
 
-#if defined(XCB_USE_IBUS)
-    m_inputContext = new QIBusPlatformInputContext;
-#else
     m_inputContext = 0;
+#if defined(XCB_USE_IBUS)
+    QIBusPlatformInputContext *context = new QIBusPlatformInputContext;
+    if (context->isValid()) {
+        m_inputContext = context;
+    } else {
+        delete context;
+    }
 #endif
 }
 
diff --git a/src/plugins/platforms/xcb/qxcbkeyboard.cpp b/src/plugins/platforms/xcb/qxcbkeyboard.cpp
index adaed53106..6f37c078a1 100644
--- a/src/plugins/platforms/xcb/qxcbkeyboard.cpp
+++ b/src/plugins/platforms/xcb/qxcbkeyboard.cpp
@@ -49,7 +49,6 @@
 #include <private/qguiapplication_p.h>
 #include <stdio.h>
 
-#define XCB_USE_IBUS
 #if defined(XCB_USE_IBUS)
 #include "QtPlatformSupport/qibusplatforminputcontext.h"
 #endif