Valgrind: Use generic timed future for uncertain progress

Change-Id: Idb7f1b1e5a0fcd0351d6c30f5a6dadcbec191898
Reviewed-by: Eike Ziller <eike.ziller@digia.com>

src/plugins/coreplugin/progressmanager/progressmanager.cpp

@@ -54,6 +54,8 @@
 #include <QTimer>
 #include <QVariant>
 
+#include <math.h>
+
 static const char kSettingsGroup[] = "Progress";
 static const char kDetailsPinned[] = "DetailsPinned";
 
@@ -737,6 +739,24 @@ FutureProgress *ProgressManager::addTask(const QFuture<void> &future, const QStr
     return m_instance->doAddTask(future, title, type, flags);
 }
 
+/*!
+    Shows a progress indicator for task given by the QFuture given by
+    the QFutureInterface \a futureInterface.
+    The progress indicator shows the specified \a title along with the progress bar.
+    The progress indicator will increase monotonically with time, at \a expectedSeconds
+    it will reach about 80%, and continue to increase with a decreasingly slower rate.
+
+    \sa addTask
+*/
+
+FutureProgress *ProgressManager::addTimedTask(QFutureInterface<void> *futureInterface, const QString &title,
+                                              Id type, int expectedSeconds, ProgressFlags flags)
+{
+    FutureProgress *fp = m_instance->doAddTask(futureInterface->future(), title, type, flags);
+    (void) new ProgressTimer(fp, futureInterface, expectedSeconds);
+    return fp;
+}
+
 void ProgressManager::setApplicationLabel(const QString &text)
 {
     m_instance->doSetApplicationLabel(text);
@@ -747,3 +767,35 @@ void ProgressManager::cancelTasks(const Id type)
     if (m_instance)
         m_instance->doCancelTasks(type);
 }
+
+
+ProgressTimer::ProgressTimer(QObject *parent,
+                             QFutureInterface<void> *futureInterface,
+                             int expectedSeconds)
+    : QTimer(parent),
+      m_futureInterface(futureInterface),
+      m_expectedTime(expectedSeconds),
+      m_currentTime(0)
+{
+    m_futureWatcher.setFuture(futureInterface->future());
+
+    m_futureInterface->setProgressRange(0, 100);
+    m_futureInterface->setProgressValue(0);
+
+    setInterval(1000); // 1 second
+    connect(this, SIGNAL(timeout()), this, SLOT(handleTimeout()));
+    connect(&m_futureWatcher, SIGNAL(started()), this, SLOT(start()));
+}
+
+void ProgressTimer::handleTimeout()
+{
+    ++m_currentTime;
+
+    // This maps expectation to atan(1) to Pi/4 ~= 0.78, i.e. snaps
+    // from 78% to 100% when expectations are met at the time the
+    // future finishes. That's not bad for a random choice.
+    const double mapped = atan2(m_currentTime, m_expectedTime);
+    const double progress = 100 * 2 * mapped / 3.14;
+    m_futureInterface->setProgressValue(int(progress));
+}
+

src/plugins/coreplugin/progressmanager/progressmanager.h

@@ -55,6 +55,8 @@ public:
 
     static FutureProgress *addTask(const QFuture<void> &future, const QString &title,
                                    Core::Id type, ProgressFlags flags = 0);
+    static FutureProgress *addTimedTask(QFutureInterface<void> *fi, const QString &title,
+                                   Core::Id type, int expectedSeconds, ProgressFlags flags = 0);
     static void setApplicationLabel(const QString &text);
 
 public slots:

src/plugins/coreplugin/progressmanager/progressmanager_p.h

@@ -38,6 +38,7 @@
 #include <QHBoxLayout>
 #include <QPointer>
 #include <QPropertyAnimation>
+#include <QTimer>
 #include <QToolButton>
 
 namespace Core {
@@ -125,6 +126,24 @@ public:
     void paintEvent(QPaintEvent *event);
 };
 
+
+class ProgressTimer : public QTimer
+{
+    Q_OBJECT
+
+public:
+    ProgressTimer(QObject *parent, QFutureInterface<void> *futureInterface, int expectedSeconds);
+
+private slots:
+    void handleTimeout();
+
+private:
+    QFutureInterface<void> *m_futureInterface;
+    QFutureWatcher<void> m_futureWatcher;
+    int m_expectedTime;
+    int m_currentTime;
+};
+
 } // namespace Internal
 } // namespace Core
 

src/plugins/valgrind/callgrindengine.cpp

@@ -48,11 +48,8 @@ CallgrindRunControl::CallgrindRunControl(const AnalyzerStartParameters &sp,
     , m_markAsPaused(false)
 {
     connect(&m_runner, SIGNAL(finished()), this, SLOT(slotFinished()));
-    connect(&m_runner, SIGNAL(started()), this, SLOT(slotStarted()));
     connect(m_runner.parser(), SIGNAL(parserDataReady()), this, SLOT(slotFinished()));
     connect(&m_runner, SIGNAL(statusMessage(QString)), SLOT(showStatusMessage(QString)));
-
-    m_progress->setProgressRange(0, 2);
 }
 
 void CallgrindRunControl::showStatusMessage(const QString &msg)
@@ -157,8 +154,3 @@ void CallgrindRunControl::slotFinished()
 {
     emit parserDataReady(this);
 }
-
-void CallgrindRunControl::slotStarted()
-{
-    m_progress->setProgressValue(1);
-}

src/plugins/valgrind/callgrindengine.h

@@ -75,7 +75,6 @@ signals:
 
 private slots:
     void slotFinished();
-    void slotStarted();
     void showStatusMessage(const QString &msg);
 
 private:

src/plugins/valgrind/memcheckengine.cpp

@@ -57,10 +57,6 @@ MemcheckRunControl::MemcheckRunControl(const AnalyzerStartParameters &sp,
             SIGNAL(suppressionCount(QString,qint64)));
     connect(&m_parser, SIGNAL(internalError(QString)),
             SIGNAL(internalParserError(QString)));
-    connect(&m_parser, SIGNAL(status(Valgrind::XmlProtocol::Status)),
-            SLOT(status(Valgrind::XmlProtocol::Status)));
-
-    m_progress->setProgressRange(0, XmlProtocol::Status::Finished + 1);
 }
 
 QString MemcheckRunControl::progressTitle() const
@@ -132,10 +128,5 @@ QStringList MemcheckRunControl::suppressionFiles() const
     return m_settings->suppressionFiles();
 }
 
-void MemcheckRunControl::status(const Status &status)
-{
-    m_progress->setProgressValue(status.state() + 1);
-}
-
 } // namespace Internal
 } // namespace Valgrind

src/plugins/valgrind/memcheckengine.h

@@ -62,9 +62,6 @@ protected:
     virtual QStringList toolArguments() const;
     virtual ValgrindRunner *runner();
 
-private slots:
-    void status(const Valgrind::XmlProtocol::Status &status);
-
 private:
     XmlProtocol::ThreadedParser m_parser;
     Memcheck::MemcheckRunner m_runner;

src/plugins/valgrind/valgrindengine.cpp

@@ -53,8 +53,6 @@ using namespace ProjectExplorer;
 namespace Valgrind {
 namespace Internal {
 
-const int progressMaximum  = 1000000;
-
 ValgrindRunControl::ValgrindRunControl(const AnalyzerStartParameters &sp,
         ProjectExplorer::RunConfiguration *runConfiguration)
     : AnalyzerRunControl(sp, runConfiguration),
@@ -80,14 +78,11 @@ bool ValgrindRunControl::startEngine()
 {
     emit starting(this);
 
-    FutureProgress *fp = ProgressManager::addTask(m_progress->future(),
+    FutureProgress *fp = ProgressManager::addTimedTask(m_progress, progressTitle(), "valgrind", 100);
-                                                        progressTitle(), "valgrind");
     fp->setKeepOnFinish(FutureProgress::HideOnFinish);
     connect(fp, SIGNAL(canceled()), this, SLOT(handleProgressCanceled()));
     connect(fp, SIGNAL(finished()), this, SLOT(handleProgressFinished()));
-    m_progress->setProgressRange(0, progressMaximum);
     m_progress->reportStarted();
-    m_progress->setProgressValue(progressMaximum / 10);
 
     const AnalyzerStartParameters &sp = startParameters();
 #if VALGRIND_DEBUG_OUTPUT
@@ -183,12 +178,6 @@ void ValgrindRunControl::runnerFinished()
 
 void ValgrindRunControl::receiveProcessOutput(const QString &output, OutputFormat format)
 {
-    int progress = m_progress->progressValue();
-    if (progress < 5 * progressMaximum / 10)
-        progress += progress / 100;
-    else if (progress < 9 * progressMaximum / 10)
-        progress += progress / 1000;
-    m_progress->setProgressValue(progress);
     appendMessage(output, format);
 }