remove transparency effect and windows-specific code for now, it's not working as supposed

src/qt/bitcoingui.cpp

@@ -21,7 +21,6 @@
 #include "guiconstants.h"
 #include "askpassphrasedialog.h"
 #include "notificator.h"
-#include "qtwin.h"
 
 #include <QApplication>
 #include <QMainWindow>
@@ -160,16 +159,6 @@ BitcoinGUI::BitcoinGUI(QWidget *parent):
     // Doubleclicking on a transaction on the transaction history page shows details
     connect(transactionView, SIGNAL(doubleClicked(QModelIndex)), transactionView, SLOT(showDetails()));
 
-#ifdef Q_OS_WIN
-    // Windows-specific customization
-    if (QtWin::isCompositionEnabled())
-    {
-        QtWin::extendFrameIntoClientArea(this);
-        setContentsMargins(0, 0, 0, 0);
-    }
-#endif
-    setWindowComposition();
-
     gotoOverviewPage();
 }
 
@@ -432,7 +421,6 @@ void BitcoinGUI::changeEvent(QEvent *e)
             }
         }
     }
-    setWindowComposition();
     QMainWindow::changeEvent(e);
 }
 
@@ -446,41 +434,6 @@ void BitcoinGUI::closeEvent(QCloseEvent *event)
     QMainWindow::closeEvent(event);
 }
 
-void BitcoinGUI::setWindowComposition()
-{
-#ifdef Q_OS_WIN
-    // Make the background transparent on Windows Vista or 7, except when maximized
-    // Otherwise text becomes hard to read
-    if (QtWin::isCompositionEnabled())
-    {
-        QPalette pal = palette();
-        QColor bg = pal.window().color();
-        if(isMaximized())
-        {
-            setAttribute(Qt::WA_TranslucentBackground, false);
-            setAttribute(Qt::WA_StyledBackground, true);
-            QBrush wb = pal.window();
-            bg = wb.color();
-            bg.setAlpha(255);
-            pal.setColor(QPalette::Window, bg);
-            setPalette(pal);
-
-        }
-        else
-        {
-            setAttribute(Qt::WA_TranslucentBackground);
-            setAttribute(Qt::WA_StyledBackground, false);
-            bg.setAlpha(0);
-            pal.setColor(QPalette::Window, bg);
-            setPalette(pal);
-            setAttribute(Qt::WA_NoSystemBackground, false);
-            ensurePolished();
-            setAttribute(Qt::WA_StyledBackground, false);
-        }
-    }
-#endif
-}
-
 void BitcoinGUI::askFee(qint64 nFeeRequired, bool *payFee)
 {
     QString strMessage =