[Flicker] Another set of flicker patches

Old approach caused navigationbar to be empty for a moment while
opening a lot of tabs at once

src/lib/navigation/locationbar.cpp

@@ -95,14 +95,14 @@ LocationBar::LocationBar(QupZilla* mainClass)
     connect(mApp, SIGNAL(message(Qz::AppMessageType,bool)), SLOT(onMessage(Qz::AppMessageType,bool)));
 
     loadSettings();
-
     clearIcon();
-    updatePlaceHolderText();
 
     // Hide icons by default
     hideGoButton();
     m_rssIcon->hide();
     m_autofillIcon->hide();
+
+    QTimer::singleShot(0, this, SLOT(updatePlaceHolderText()));
 }
 
 void LocationBar::setWebView(TabbedWebView* view)

src/lib/navigation/navigationbar.cpp

@@ -242,12 +242,6 @@ void NavigationBar::setLayoutSpacing(int spacing)
     m_layout->setSpacing(spacing);
 }
 
-void NavigationBar::pauseUpdates()
-{
-    setUpdatesEnabled(false);
-    QTimer::singleShot(100, this, SLOT(enableUpdates()));
-}
-
 void NavigationBar::aboutToShowHistoryBackMenu()
 {
     if (!m_menuBack || !p_QupZilla->weView()) {
@@ -323,11 +317,6 @@ void NavigationBar::clearHistory()
     refreshHistory();
 }
 
-void NavigationBar::enableUpdates()
-{
-    setUpdatesEnabled(true);
-}
-
 void NavigationBar::contextMenuRequested(const QPoint &pos)
 {
     p_QupZilla->popupToolbarsMenu(mapToGlobal(pos));

src/lib/navigation/navigationbar.h

@@ -63,9 +63,6 @@ public:
     int layoutSpacing() const;
     void setLayoutSpacing(int spacing);
 
-    // Pause updates for 100 msecs
-    void pauseUpdates();
-
 signals:
 
 public slots:
@@ -84,8 +81,6 @@ private slots:
     void goAtHistoryIndexInNewTab(int index = -1);
 
     void clearHistory();
-    void enableUpdates();
-
     void contextMenuRequested(const QPoint &pos);
 
 private:

src/lib/navigation/reloadstopbutton.cpp

@@ -18,6 +18,7 @@
 #include "reloadstopbutton.h"
 
 #include <QHBoxLayout>
+#include <QTimer>
 
 ReloadStopButton::ReloadStopButton(QWidget* parent)
     : QWidget(parent)
@@ -46,22 +47,39 @@ ReloadStopButton::ReloadStopButton(QWidget* parent)
     lay->setSpacing(0);
 }
 
-void ReloadStopButton::showReloadButton()
-{
-    setUpdatesEnabled(false);
-    m_buttonStop->hide();
-    m_buttonReload->show();
-    setUpdatesEnabled(true);
-}
-
 void ReloadStopButton::showStopButton()
 {
-    setUpdatesEnabled(false);
+    if (updatesEnabled()) {
+        setUpdatesEnabled(false);
+        QTimer::singleShot(100, this, SLOT(enableUpdates()));
+    }
+
     m_buttonReload->hide();
     m_buttonStop->show();
-    setUpdatesEnabled(true);
 }
 
-ReloadStopButton::~ReloadStopButton()
+void ReloadStopButton::showReloadButton()
 {
+    if (updatesEnabled()) {
+        setUpdatesEnabled(false);
+        QTimer::singleShot(100, this, SLOT(enableUpdates()));
+    }
+
+    m_buttonStop->hide();
+    m_buttonReload->show();
+}
+
+ToolButton* ReloadStopButton::buttonStop() const
+{
+    return m_buttonStop;
+}
+
+ToolButton* ReloadStopButton::buttonReload() const
+{
+    return m_buttonReload;
+}
+
+void ReloadStopButton::enableUpdates()
+{
+    setUpdatesEnabled(true);
 }

src/lib/navigation/reloadstopbutton.h

@@ -23,15 +23,19 @@
 
 class QT_QUPZILLA_EXPORT ReloadStopButton : public QWidget
 {
+    Q_OBJECT
+
 public:
     explicit ReloadStopButton(QWidget* parent = 0);
-    ~ReloadStopButton();
 
     void showStopButton();
     void showReloadButton();
 
-    ToolButton* buttonStop() { return m_buttonStop; }
-    ToolButton* buttonReload() { return m_buttonReload; }
+    ToolButton* buttonStop() const;
+    ToolButton* buttonReload() const;
+
+private slots:
+    void enableUpdates();
 
 private:
     ToolButton* m_buttonStop;

src/lib/navigation/siteicon.cpp

@@ -22,6 +22,7 @@
 #include "qztools.h"
 
 #include <QDrag>
+#include <QTimer>
 #include <QMimeData>
 #include <QApplication>
 #include <QContextMenuEvent>

src/lib/webview/tabwidget.cpp

@@ -326,10 +326,6 @@ int TabWidget::addView(QNetworkRequest req, const QString &title, const Qz::NewT
         QtWin::extendFrameIntoClientArea(p_QupZilla);
     }
 #endif
-    // Pause updates, so pages that loads instantly (eg. qupzilla: internal pages) don't cause
-    // flickering in navigationbar (load button and locationbar)
-    // Also disable updates of tabwidget, so background of webview doesn't flashes
-    p_QupZilla->navigationBar()->pauseUpdates();
     setUpdatesEnabled(false);
 
     QUrl url = req.url();

src/lib/webview/webtab.cpp

@@ -357,6 +357,11 @@ void WebTab::slotRestore()
     m_view->tabWidget()->getTabBar()->restoreTabTextColor(tabIndex());
 }
 
+void WebTab::enableUpdates()
+{
+    setUpdatesEnabled(true);
+}
+
 int WebTab::tabIndex() const
 {
     return m_view->tabIndex();

src/lib/webview/webtab.h

@@ -100,6 +100,7 @@ public:
 private slots:
     void showNotification(QWidget* notif);
     void slotRestore();
+    void enableUpdates();
 
 private:
     QupZilla* p_QupZilla;