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

Author: jonasschnelli

src/Makefile.qt.include

@@ -96,6 +96,7 @@ QT_FORMS_UI = \
   qt/forms/editaddressdialog.ui \
   qt/forms/helpmessagedialog.ui \
   qt/forms/intro.ui \
+  qt/forms/modaloverlay.ui \
   qt/forms/openuridialog.ui \
   qt/forms/optionsdialog.ui \
   qt/forms/overviewpage.ui \
@@ -125,6 +126,7 @@ QT_MOC_CPP = \
   qt/moc_intro.cpp \
   qt/moc_macdockiconhandler.cpp \
   qt/moc_macnotificationhandler.cpp \
+  qt/moc_modaloverlay.cpp \
   qt/moc_notificator.cpp \
   qt/moc_openuridialog.cpp \
   qt/moc_optionsdialog.cpp \
@@ -192,6 +194,7 @@ BITCOIN_QT_H = \
   qt/intro.h \
   qt/macdockiconhandler.h \
   qt/macnotificationhandler.h \
+  qt/modaloverlay.h \
   qt/networkstyle.h \
   qt/notificator.h \
   qt/openuridialog.h \
@@ -292,6 +295,7 @@ BITCOIN_QT_CPP = \
   qt/csvmodelwriter.cpp \
   qt/guiutil.cpp \
   qt/intro.cpp \
+  qt/modaloverlay.cpp \
   qt/networkstyle.cpp \
   qt/notificator.cpp \
   qt/optionsdialog.cpp \

src/qt/bitcoingui.cpp

@@ -12,6 +12,7 @@
 #include "clientmodel.h"
 #include "guiconstants.h"
 #include "guiutil.h"
+#include "modaloverlay.h"
 #include "networkstyle.h"
 #include "notificator.h"
 #include "openuridialog.h"
@@ -114,6 +115,7 @@ BitcoinGUI::BitcoinGUI(const PlatformStyle *platformStyle, const NetworkStyle *n
     notificator(0),
     rpcConsole(0),
     helpMessageDialog(0),
+    modalOverlay(0),
     prevBlocks(0),
     spinnerFrame(0),
     platformStyle(platformStyle)
@@ -241,6 +243,12 @@ BitcoinGUI::BitcoinGUI(const PlatformStyle *platformStyle, const NetworkStyle *n
 
     // Subscribe to notifications from core
     subscribeToCoreSignals();
+
+    modalOverlay = new ModalOverlay(this->centralWidget());
+#ifdef ENABLE_WALLET
+    if(enableWallet)
+        connect(walletFrame, SIGNAL(requestedOfSyncWarningInfo()), this, SLOT(showModalOverlay()));
+#endif
 }
 
 BitcoinGUI::~BitcoinGUI()
@@ -491,6 +499,8 @@ void BitcoinGUI::setClientModel(ClientModel *clientModel)
             // initialize the disable state of the tray icon with the current value in the model.
             setTrayIconVisible(optionsModel->getHideTrayIcon());
         }
+
+        modalOverlay->setKnownBestHeight(clientModel->getHeaderHeight());
     } else {
         // Disable possibility to show main window via action
         toggleHideAction->setEnabled(false);
@@ -705,7 +715,14 @@ void BitcoinGUI::setNumConnections(int count)
 
 void BitcoinGUI::setNumBlocks(int count, const QDateTime& blockDate, double nVerificationProgress, bool header)
 {
-    if(!clientModel)
+    if (modalOverlay)
+    {
+        if (header)
+            modalOverlay->setKnownBestHeight(count);
+        else
+            modalOverlay->tipUpdate(count, blockDate, nVerificationProgress);
+    }
+    if (!clientModel)
         return;
 
     // Prevent orphan statusbar messages (e.g. hover Quit in main menu, wait until chain-sync starts -> garbelled text)
@@ -754,7 +771,10 @@ void BitcoinGUI::setNumBlocks(int count, const QDateTime& blockDate, double nVer
 
 #ifdef ENABLE_WALLET
         if(walletFrame)
+        {
             walletFrame->showOutOfSyncWarning(false);
+            modalOverlay->showHide(true, true);
+        }
 #endif // ENABLE_WALLET
 
         progressBarLabel->setVisible(false);
@@ -782,7 +802,10 @@ void BitcoinGUI::setNumBlocks(int count, const QDateTime& blockDate, double nVer
 
 #ifdef ENABLE_WALLET
         if(walletFrame)
+        {
             walletFrame->showOutOfSyncWarning(true);
+            modalOverlay->showHide();
+        }
 #endif // ENABLE_WALLET
 
         tooltip += QString("<br>");
@@ -1078,6 +1101,12 @@ void BitcoinGUI::setTrayIconVisible(bool fHideTrayIcon)
     }
 }
 
+void BitcoinGUI::showModalOverlay()
+{
+    if (modalOverlay)
+        modalOverlay->showHide(false, true);
+}
+
 static bool ThreadSafeMessageBox(BitcoinGUI *gui, const std::string& message, const std::string& caption, unsigned int style)
 {
     bool modal = (style & CClientUIInterface::MODAL);

src/qt/bitcoingui.h

@@ -29,6 +29,7 @@ class UnitDisplayStatusBarControl;
 class WalletFrame;
 class WalletModel;
 class HelpMessageDialog;
+class ModalOverlay;
 
 class CWallet;
 
@@ -118,6 +119,7 @@ class BitcoinGUI : public QMainWindow
     Notificator *notificator;
     RPCConsole *rpcConsole;
     HelpMessageDialog *helpMessageDialog;
+    ModalOverlay *modalOverlay;
 
     /** Keep track of previous number of blocks, to detect progress */
     int prevBlocks;
@@ -229,6 +231,8 @@ private Q_SLOTS:
 
     /** When hideTrayIcon setting is changed in OptionsModel hide or show the icon accordingly. */
     void setTrayIconVisible(bool);
+
+    void showModalOverlay();
 };
 
 class UnitDisplayStatusBarControl : public QLabel