Added a GUI style selection combo box. Lists all built in GUI styles available. This allows user to change the GUI style while it is running. Also, style setting is saved and used for future GUI startups.

src/drivers/Qt/ConsoleWindow.cpp

@@ -36,6 +36,8 @@
 #include <QMessageBox>
 #include <QInputDialog>
 #include <QDesktopServices>
+#include <QStyleFactory>
+#include <QApplication>
 #include <QUrl>
 
 #include "../../fceu.h"
@@ -88,6 +90,19 @@ consoleWin_t::consoleWin_t(QWidget *parent)
 	int opt, xWinSize = 256, yWinSize = 240;
 	int use_SDL_video = false;
 	int setFullScreen = false;
+	std::string guiStyle;
+
+	g_config->getOption("SDL.GuiStyle", &guiStyle );
+
+	if ( guiStyle.size() > 0 )
+	{
+		QStyle *sty = QStyleFactory::create( tr(guiStyle.c_str()) );
+
+		if ( sty != nullptr )
+		{
+			QApplication::setStyle(sty);
+		}
+	}
 
 	createMainMenu();
 

src/drivers/Qt/GuiConf.cpp

@@ -20,6 +20,8 @@
 // PaletteConf.cpp
 //
 #include <QTextEdit>
+#include <QApplication>
+#include <QStyleFactory>
 
 #include "Qt/GuiConf.h"
 #include "Qt/main.h"
@@ -38,8 +40,14 @@ GuiConfDialog_t::GuiConfDialog_t(QWidget *parent)
 	QVBoxLayout *mainLayout;
 	QHBoxLayout *hbox;
 	QPushButton *closeButton;
+	QLabel      *lbl;
+	QStringList  styleKeys;
+	QString      selStyle;
 
 	//resize( 512, 600 );
+	//printf("Style: %s \n", style()->objectName().toStdString().c_str() );
+
+	selStyle = style()->objectName();
 
 	// sync with config
 	g_config->getOption("SDL.UseNativeFileDialog", &useNativeFileDialogVal);
@@ -58,6 +66,29 @@ GuiConfDialog_t::GuiConfDialog_t(QWidget *parent)
 	connect(useNativeFileDialog, SIGNAL(stateChanged(int)), this, SLOT(useNativeFileDialogChanged(int)));
 	connect(useNativeMenuBar, SIGNAL(stateChanged(int)), this, SLOT(useNativeMenuBarChanged(int)));
 
+	hbox = new QHBoxLayout();
+	lbl  = new QLabel( tr("Style:") );
+
+	styleComboBox = new QComboBox();
+
+	styleKeys = QStyleFactory::keys();
+
+	for (int i=0; i<styleKeys.size(); i++)
+	{
+		styleComboBox->addItem( styleKeys[i], i );
+
+		if ( selStyle.compare( styleKeys[i], Qt::CaseInsensitive ) == 0 )
+		{
+			//printf("Style Match: %s \n", selStyle.toStdString().c_str() );
+			styleComboBox->setCurrentIndex(i);
+		}
+	}
+	connect(styleComboBox, SIGNAL(currentIndexChanged(int)), this, SLOT(styleChanged(int)));
+
+	hbox->addWidget( lbl, 1 );
+	hbox->addWidget( styleComboBox, 10 );
+
+	mainLayout->addLayout(hbox);
 	mainLayout->addWidget(useNativeFileDialog);
 	mainLayout->addWidget(useNativeMenuBar);
 
@@ -65,6 +96,7 @@ GuiConfDialog_t::GuiConfDialog_t(QWidget *parent)
 	closeButton->setIcon(style()->standardIcon(QStyle::SP_DialogCloseButton));
 	connect(closeButton, SIGNAL(clicked(void)), this, SLOT(closeWindow(void)));
 
+
 	hbox = new QHBoxLayout();
 	hbox->addStretch(3);
 	hbox->addWidget( closeButton, 3 );
@@ -111,3 +143,23 @@ void GuiConfDialog_t::useNativeMenuBarChanged(int state)
 	consoleWindow->menuBar()->setNativeMenuBar(value);
 }
 //----------------------------------------------------
+void GuiConfDialog_t::styleChanged(int index)
+{
+	QString s;
+	QStyle *sty;
+
+	s = styleComboBox->currentText();
+
+	//printf("Style: '%s'\n", s.toStdString().c_str() );
+
+	sty = QStyleFactory::create( s );
+
+	if ( sty != nullptr )
+	{
+		QApplication::setStyle(sty);
+
+		g_config->setOption("SDL.GuiStyle", s.toStdString().c_str() );
+		g_config->save();
+	}
+}
+//----------------------------------------------------

src/drivers/Qt/GuiConf.h

@@ -30,6 +30,7 @@ protected:
 
 	QCheckBox *useNativeFileDialog;
 	QCheckBox *useNativeMenuBar;
+	QComboBox *styleComboBox;
 
 private:
 public slots:
@@ -37,4 +38,5 @@ public slots:
 private slots:
 	void useNativeFileDialogChanged(int v);
 	void useNativeMenuBarChanged(int v);
+	void styleChanged(int index);
 };

src/drivers/Qt/config.cpp

@@ -373,6 +373,7 @@ InitConfig()
 
 	config->addOption("_useNativeFileDialog", "SDL.UseNativeFileDialog", false);
 	config->addOption("_useNativeMenuBar"   , "SDL.UseNativeMenuBar", false);
+	config->addOption("SDL.GuiStyle", "");
     
 	config->addOption("_setSchedParam"      , "SDL.SetSchedParam" , 0);
 	config->addOption("_emuSchedPolicy"     , "SDL.EmuSchedPolicy", 0);