- Refresh torrent properties and transfer list only when they are visible in order to save CPU :)

src/GUI.cpp

@@ -60,7 +60,6 @@
 #include "statusbar.h"
 
 using namespace libtorrent;
-enum TabIndex{TAB_TRANSFER, TAB_SEARCH, TAB_RSS};
 
 /*****************************************************
  *                                                   *
@@ -110,14 +109,15 @@ GUI::GUI(QWidget *parent, QStringList torrentCmdLine) : QMainWindow(parent), dis
 
   qDebug("create tabWidget");
   tabs = new QTabWidget();
+  connect(tabs, SIGNAL(currentChanged(int)), this, SLOT(tab_changed(int)));
   vSplitter = new QSplitter(Qt::Horizontal);
   vSplitter->setChildrenCollapsible(false);
   hSplitter = new QSplitter(Qt::Vertical);
   hSplitter->setChildrenCollapsible(false);
 
   // Transfer List tab
-  transferList = new TransferListWidget(hSplitter, BTSession);
+  transferList = new TransferListWidget(hSplitter, this, BTSession);
-  properties = new PropertiesWidget(hSplitter, transferList, BTSession);
+  properties = new PropertiesWidget(hSplitter, this, transferList, BTSession);
   transferListFilters = new TransferListFiltersWidget(vSplitter, transferList);
   hSplitter->addWidget(transferList);
   hSplitter->addWidget(properties);
@@ -246,6 +246,14 @@ void GUI::on_actionBugReport_triggered() const {
   QDesktopServices::openUrl(QUrl(QString::fromUtf8("http://bugs.qbittorrent.org")));
 }
 
+void GUI::tab_changed(int new_tab) {
+  if(new_tab == TAB_TRANSFER) {
+    qDebug("Changed tab to transfer list, refreshing the list");
+    transferList->refreshList();
+    properties->loadDynamicData();
+  }
+}
+
 void GUI::writeSettings() {
   QSettings settings(QString::fromUtf8("qBittorrent"), QString::fromUtf8("qBittorrent"));
   settings.beginGroup(QString::fromUtf8("MainWindow"));
@@ -410,7 +418,7 @@ void GUI::previewFile(QString filePath) {
 }
 
 int GUI::getCurrentTabIndex() const{
-  if(isMinimized() || isHidden())
+  if(isMinimized() || !isVisible())
     return -1;
   return tabs->currentIndex();
 }
@@ -463,7 +471,11 @@ void GUI::on_actionAbout_triggered() {
 
 void GUI::showEvent(QShowEvent *e) {
   qDebug("** Show Event **");
-  //updateLists(true);
+  if(getCurrentTabIndex() == TAB_TRANSFER) {
+    qDebug("-> Refreshing transfer list");
+    transferList->refreshList();
+    properties->loadDynamicData();
+  }
   e->accept();
 }
 

src/GUI.h

@@ -37,6 +37,8 @@
 #include "ui_mainwindow.h"
 #include "qtorrenthandle.h"
 
+enum TabIndex{TAB_TRANSFER, TAB_SEARCH, TAB_RSS};
+
 class Bittorrent;
 class QTimer;
 class downloadFromURL;
@@ -112,6 +114,7 @@ class GUI : public QMainWindow, private Ui::MainWindow{
     void fullDiskError(QTorrentHandle& h, QString msg) const;
     void handleDownloadFromUrlFailure(QString, QString) const;
     void createSystrayDelayed();
+    void tab_changed(int);
     // Keyboard shortcuts
     void createKeyboardShortcuts();
     void displayTransferTab() const;

src/propertieswidget.cpp

@@ -48,6 +48,7 @@
 #include "torrentfilesmodel.h"
 #include "peerlistwidget.h"
 #include "trackerlist.h"
+#include "GUI.h"
 
 #ifdef Q_WS_MAC
 #define DEFAULT_BUTTON_CSS ""
@@ -57,7 +58,8 @@
 #define SELECTED_BUTTON_CSS "QPushButton {border: 1px solid rgb(85, 81, 91);border-radius: 3px;padding: 2px;background-color: rgb(255, 208, 105); margin-left: 3px; margin-right: 3px;}"
 #endif
 
-PropertiesWidget::PropertiesWidget(QWidget *parent, TransferListWidget *transferList, Bittorrent* BTSession): QWidget(parent), transferList(transferList), BTSession(BTSession) {
+PropertiesWidget::PropertiesWidget(QWidget *parent, GUI* main_window, TransferListWidget *transferList, Bittorrent* BTSession):
+    QWidget(parent), transferList(transferList), main_window(main_window), BTSession(BTSession) {
   setupUi(this);
   state = VISIBLE;
 
@@ -283,8 +285,9 @@ void PropertiesWidget::reloadPreferences() {
 }
 
 void PropertiesWidget::loadDynamicData() {
-  if(!h.is_valid()) return;
+  // Refresh only if the torrent handle is valid and if visible
-  if(state != VISIBLE) return;
+  if(!h.is_valid() || main_window->getCurrentTabIndex() != TAB_TRANSFER || state != VISIBLE) return;
+  qDebug("Refreshing torrent properties");
   try {
     // Transfer infos
     if(stackedProperties->currentIndex() == MAIN_TAB) {

src/propertieswidget.h

@@ -47,6 +47,7 @@ class QAction;
 class torrent_file;
 class PeerListWidget;
 class TrackerList;
+class GUI;
 
 enum Tab {MAIN_TAB, TRACKERS_TAB, PEERS_TAB, URLSEEDS_TAB, FILES_TAB};
 enum SlideState {REDUCED, VISIBLE};
@@ -56,6 +57,7 @@ class PropertiesWidget : public QWidget, private Ui::PropertiesWidget {
 
 private:
   TransferListWidget *transferList;
+  GUI *main_window;
   QTorrentHandle h;
   QTimer *refreshTimer;
   RealProgressBar *progressBar;
@@ -78,7 +80,6 @@ protected:
 
 protected slots:
   void loadTorrentInfos(QTorrentHandle &h);
-  void loadDynamicData();
   void loadUrlSeeds();
   void on_main_infos_button_clicked();
   void on_trackers_button_clicked();
@@ -96,6 +97,7 @@ protected slots:
   void filteredFilesChanged();
 
 public slots:
+  void loadDynamicData();
   void reduce();
   void slide();
   void clear();
@@ -104,7 +106,7 @@ public slots:
   void reloadPreferences();
 
 public:
-  PropertiesWidget(QWidget *parent, TransferListWidget *transferList, Bittorrent* BTSession);
+  PropertiesWidget(QWidget *parent, GUI* main_window, TransferListWidget *transferList, Bittorrent* BTSession);
   ~PropertiesWidget();
   const QTorrentHandle& getCurrentTorrent() const;
   Bittorrent* getBTSession() const;

src/transferlistwidget.cpp

@@ -35,6 +35,7 @@
 #include "previewselect.h"
 #include "speedlimitdlg.h"
 #include "options_imp.h"
+#include "GUI.h"
 #include "deletionconfirmationdlg.h"
 #include <QStandardItemModel>
 #include <QSortFilterProxyModel>
@@ -48,10 +49,10 @@
 #include <QRegExp>
 #include <vector>
 
-TransferListWidget::TransferListWidget(QWidget *parent, Bittorrent *_BTSession): QTreeView(parent) {
+TransferListWidget::TransferListWidget(QWidget *parent, GUI *main_window, Bittorrent *_BTSession):
-  QSettings settings("qBittorrent", "qBittorrent");
+    QTreeView(parent), BTSession(_BTSession), main_window(main_window) {
-  BTSession = _BTSession;
 
+  QSettings settings("qBittorrent", "qBittorrent");
   // Create and apply delegate
   listDelegate = new TransferListDelegate(this);
   setItemDelegate(listDelegate);
@@ -386,6 +387,9 @@ void TransferListWidget::setRefreshInterval(int t) {
 }
 
 void TransferListWidget::refreshList() {
+  // Refresh only if displayed
+  if(main_window->getCurrentTabIndex() != TAB_TRANSFER) return;
+  qDebug("Refreshing transfer list");
   unsigned int nb_downloading = 0, nb_seeding=0, nb_active=0, nb_inactive = 0;
   for(int i=0; i<listModel->rowCount(); ++i) {
     int s = updateTorrent(i);

src/transferlistwidget.h

@@ -39,6 +39,7 @@ class QSortFilterProxyModel;
 class Bittorrent;
 class QTimer;
 class TransferListDelegate;
+class GUI;
 
 enum TorrentFilter {FILTER_ALL, FILTER_DOWNLOADING, FILTER_COMPLETED, FILTER_ACTIVE, FILTER_INACTIVE};
 
@@ -51,9 +52,10 @@ private:
   QSortFilterProxyModel *proxyModel;
   Bittorrent* BTSession;
   QTimer *refreshTimer;
+  GUI *main_window;
 
 public:
-  TransferListWidget(QWidget *parent, Bittorrent* BTSession);
+  TransferListWidget(QWidget *parent, GUI *main_window, Bittorrent* BTSession);
   ~TransferListWidget();
 
 protected: