[Qt] add out-of-sync modal info layer

1 files changed, 150 insertions, 0 deletions

diff --git a/src/qt/modaloverlay.cpp b/src/qt/modaloverlay.cpp
new file mode 100644
index 0000000000..1cd5b19966
--- /dev/null
+++ b/src/qt/modaloverlay.cpp
@@ -0,0 +1,150 @@
+// Copyright (c) 2017 The Bitcoin Core developers
+// Distributed under the MIT software license, see the accompanying
+// file COPYING or http://www.opensource.org/licenses/mit-license.php.
+
+#include "modaloverlay.h"
+#include "ui_modaloverlay.h"
+
+#include "guiutil.h"
+
+#include <QResizeEvent>
+#include <QPropertyAnimation>
+
+ModalOverlay::ModalOverlay(QWidget *parent) :
+QWidget(parent),
+ui(new Ui::ModalOverlay),
+bestBlockHeight(0),
+layerIsVisible(false),
+userClosed(false)
+{
+    ui->setupUi(this);
+    connect(ui->closeButton, SIGNAL(clicked()), this, SLOT(closeClicked()));
+    if (parent) {
+        parent->installEventFilter(this);
+        raise();
+    }
+
+    blockProcessTime.clear();
+    setVisible(false);
+}
+
+ModalOverlay::~ModalOverlay()
+{
+    delete ui;
+}
+
+bool ModalOverlay::eventFilter(QObject * obj, QEvent * ev) {
+    if (obj == parent()) {
+        if (ev->type() == QEvent::Resize) {
+            QResizeEvent * rev = static_cast<QResizeEvent*>(ev);
+            resize(rev->size());
+            if (!layerIsVisible)
+                setGeometry(0, height(), width(), height());
+
+        }
+        else if (ev->type() == QEvent::ChildAdded) {
+            raise();
+        }
+    }
+    return QWidget::eventFilter(obj, ev);
+}
+
+//! Tracks parent widget changes
+bool ModalOverlay::event(QEvent* ev) {
+    if (ev->type() == QEvent::ParentAboutToChange) {
+        if (parent()) parent()->removeEventFilter(this);
+    }
+    else if (ev->type() == QEvent::ParentChange) {
+        if (parent()) {
+            parent()->installEventFilter(this);
+            raise();
+        }
+    }
+    return QWidget::event(ev);
+}
+
+void ModalOverlay::setKnownBestHeight(int count)
+{
+    if (count > bestBlockHeight)
+        bestBlockHeight = count;
+}
+
+void ModalOverlay::tipUpdate(int count, const QDateTime& blockDate, double nVerificationProgress)
+{
+    QDateTime currentDate = QDateTime::currentDateTime();
+
+    // keep a vector of samples of verification progress at height
+    blockProcessTime.push_front(qMakePair(currentDate.currentMSecsSinceEpoch(), nVerificationProgress));
+
+    // show progress speed if we have more then one sample
+    if (blockProcessTime.size() >= 2)
+    {
+        // try to get the window from the last 500 seconds or at least 10 samples
+        double progressStart = blockProcessTime[0].second;
+        double progressDelta = 0;
+        double progressPerHour = 0;
+        qint64 timeDelta = 0;
+        qint64 remainingMSecs = 0;
+        double remainingProgress = 1.0 - nVerificationProgress;
+        for (int i = 1; i < blockProcessTime.size(); i++)
+        {
+            QPair<qint64, double> sample = blockProcessTime[i];
+
+            // take first sample after 500 seconds or last available one
+            if (sample.first < (currentDate.currentMSecsSinceEpoch() - 500*1000) || i == blockProcessTime.size()-1)
+            {
+                progressDelta = progressStart-sample.second;
+                timeDelta = blockProcessTime[0].first - sample.first;
+                progressPerHour = progressDelta/(double)timeDelta*1000*3600;
+                remainingMSecs = remainingProgress / progressDelta * timeDelta;
+                break;
+            }
+        }
+        // show progress increase per hour
+        ui->progressIncreasePerH->setText(QString::number(progressPerHour*100, 'f', 2)+"%");
+
+        // show expected remaining time
+        ui->expectedTimeLeft->setText(GUIUtil::formateNiceTimeOffset(remainingMSecs/1000.0));
+
+        // keep maximal 5000 samples
+        static int maxSamples = 5000;
+        if (blockProcessTime.count() > maxSamples)
+            blockProcessTime.remove(maxSamples, blockProcessTime.count()-maxSamples);
+    }
+
+    // show the last block date
+    ui->newestBlockDate->setText(blockDate.toString());
+
+    // show the percentage done according to nVerificationProgress
+    ui->percentageProgress->setText(QString::number(nVerificationProgress*100, 'f', 2)+"%");
+    ui->progressBar->setValue(nVerificationProgress*100);
+
+    // show remaining amount of blocks
+    if (bestBlockHeight > 0)
+        ui->amountOfBlocksLeft->setText(QString::number(bestBlockHeight-count));
+}
+
+void ModalOverlay::showHide(bool hide, bool userRequested)
+{
+    if ( (layerIsVisible && !hide) || (!layerIsVisible && hide) || (!hide && userClosed && !userRequested))
+        return;
+
+    if (!isVisible() && !hide)
+        setVisible(true);
+
+    setGeometry(0, hide ? 0 : height(), width(), height());
+
+    QPropertyAnimation* animation = new QPropertyAnimation(this, "pos");
+    animation->setDuration(300);
+    animation->setStartValue(QPoint(0, hide ? 0 : this->height()));
+    animation->setEndValue(QPoint(0, hide ? this->height() : 0));
+    animation->setEasingCurve(QEasingCurve::OutQuad);
+    animation->start(QAbstractAnimation::DeleteWhenStopped);
+    layerIsVisible = !hide;
+}
+
+void ModalOverlay::closeClicked()
+{
+    showHide(true);
+    userClosed = true;
+}