Prevent removing buildsteps if the buildsteps are queued for building.

Task-Nr: QTCREATORBUG-1044

src/plugins/projectexplorer/buildconfiguration.cpp

@@ -32,6 +32,8 @@
 #include <utils/qtcassert.h>
 #include <coreplugin/icore.h>
 #include <extensionsystem/pluginmanager.h>
+#include <projectexplorer/projectexplorer.h>
+#include <projectexplorer/buildmanager.h>
 
 #include <QtCore/QProcess>
 
@@ -187,11 +189,18 @@ void BuildConfiguration::insertStep(StepType type, int position, BuildStep *step
     m_steps[type].insert(position, step);
 }
 
-void BuildConfiguration::removeStep(StepType type, int position)
+bool BuildConfiguration::removeStep(StepType type, int position)
 {
     Q_ASSERT(type >= 0 && type < LastStepType);
+
+    ProjectExplorer::BuildManager *bm =
+            ProjectExplorer::ProjectExplorerPlugin::instance()->buildManager();
+    if (bm->isBuilding(m_steps[type].at(position)))
+        return false;
+
     delete m_steps[type].at(position);
     m_steps[type].removeAt(position);
+    return true;
 }
 
 void BuildConfiguration::moveStepUp(StepType type, int position)

src/plugins/projectexplorer/buildconfiguration.h

@@ -55,7 +55,7 @@ public:
 
     QList<BuildStep *> steps(StepType type) const;
     void insertStep(StepType type, int position, BuildStep *step);
-    void removeStep(StepType type, int position);
+    bool removeStep(StepType type, int position);
     void moveStepUp(StepType type, int position);
 
     virtual QString buildDirectory() const = 0;

src/plugins/projectexplorer/buildmanager.cpp

@@ -465,6 +465,11 @@ bool BuildManager::isBuilding(Project *pro)
         return true;
 }
 
+bool BuildManager::isBuilding(BuildStep *step)
+{
+    return (m_currentBuildStep == step) || m_buildQueue.contains(step);
+}
+
 void BuildManager::incrementActiveBuildSteps(Project *pro)
 {
     QHash<Project *, int>::iterator it = m_activeBuildSteps.find(pro);

src/plugins/projectexplorer/buildmanager.h

@@ -75,6 +75,7 @@ public:
     void cleanProject(BuildConfiguration *configuration);
     void cleanProjects(const QList<BuildConfiguration *> &configurations);
     bool isBuilding(Project *p);
+    bool isBuilding(BuildStep *step);
 
     // Append any build step to the list of build steps (currently only used to add the QMakeStep)
     void appendStep(BuildStep *step);

src/plugins/projectexplorer/buildstepspage.cpp

@@ -31,6 +31,7 @@
 #include "buildconfiguration.h"
 
 #include <coreplugin/coreconstants.h>
+#include <coreplugin/icore.h>
 #include <extensionsystem/pluginmanager.h>
 #include <utils/qtcassert.h>
 
@@ -42,6 +43,8 @@
 #include <QtGui/QVBoxLayout>
 #include <QtGui/QHBoxLayout>
 #include <QtGui/QToolButton>
+#include <QtGui/QMessageBox>
+#include <QtGui/QMainWindow>
 
 using namespace ProjectExplorer;
 using namespace ProjectExplorer::Internal;
@@ -241,16 +244,22 @@ void BuildStepsPage::stepMoveDown(int pos)
 
 void BuildStepsPage::stepRemove(int pos)
 {
+    if (m_configuration->removeStep(m_type, pos)) {
         BuildStepsWidgetStruct s = m_buildSteps.at(pos);
         delete s.widget;
         delete s.detailsWidget;
         m_buildSteps.removeAt(pos);
-    m_configuration->removeStep(m_type, pos);
 
         updateBuildStepButtonsState();
 
         bool hasSteps = m_configuration->steps(m_type).isEmpty();
         m_noStepsLabel->setVisible(hasSteps);
+    } else {
+        QMessageBox::warning(Core::ICore::instance()->mainWindow(),
+                             tr("Removing Step failed"),
+                             tr("Can't remove build step while building"),
+                             QMessageBox::Ok, QMessageBox::Ok);
+    }
 }
 
 void BuildStepsPage::setupUi()