From fc9af6abb14ed651fb5d3743eaa4044a6864a5aa Mon Sep 17 00:00:00 2001
From: Jean-Francois Dockes <jfd@recoll.org>
Date: Tue, 15 May 2012 16:11:12 +0200
Subject: [PATCH] GUI crash: protect against starting simultaneous queries

---
 src/qtgui/rclmain_w.cpp | 4 +++-
 src/qtgui/rclmain_w.h   | 4 +++-
 2 files changed, 6 insertions(+), 2 deletions(-)

diff --git a/src/qtgui/rclmain_w.cpp b/src/qtgui/rclmain_w.cpp
index 99d437d6..390e023b 100644
--- a/src/qtgui/rclmain_w.cpp
+++ b/src/qtgui/rclmain_w.cpp
@@ -800,8 +800,9 @@ class QueryThread : public QThread {
 
 void RclMain::initiateQuery()
 {
-    if (m_source.isNull())
+    if (m_queryActive || m_source.isNull())
 	return;
+    m_queryActive = true;
 
     QApplication::setOverrideCursor(QCursor(Qt::WaitCursor));
     QueryThread qthr(m_source);
@@ -846,6 +847,7 @@ void RclMain::initiateQuery()
 
     statusBar()->showMessage(msg, 0);
     QApplication::restoreOverrideCursor();
+    m_queryActive = false;
     emit(resultsReady());
 }
 
diff --git a/src/qtgui/rclmain_w.h b/src/qtgui/rclmain_w.h
index 3710ac95..0928d209 100644
--- a/src/qtgui/rclmain_w.h
+++ b/src/qtgui/rclmain_w.h
@@ -70,7 +70,8 @@ public:
           m_idAllStem(0),
 	  m_idxproc(0),
 	  m_sortspecnochange(false),
-	  m_indexerState(IXST_RUNNINGNOTMINE)
+	  m_indexerState(IXST_RUNNINGNOTMINE),
+	  m_queryActive(false)
     {
 	setupUi(this);
 	init();
@@ -174,6 +175,7 @@ private:
     DocSeqSortSpec    m_sortspec;
     RefCntr<DocSequence> m_source;
     IndexerState      m_indexerState;
+    bool              m_queryActive;
 
     // If set on init, will be displayed either through ext app, or
     // preview (if no ext app set)