Fixed issue that cmd+click to flood fill did not work on macOS

Author: rpwang17

freeview/DialogPreferences.cpp

@@ -82,7 +82,7 @@ DialogPreferences::DialogPreferences(QWidget *parent) :
 
 #ifdef Q_OS_MAC
   ui->groupBoxMac->setEnabled(true);
-  ui->groupBoxMac->show();
+  ui->groupBoxMac->hide();
 //  connect(ui->checkBoxMacUnified, SIGNAL(toggled(bool)), mainwnd, SLOT(SetUnifiedTitleAndToolBar(bool)));
   connect(ui->checkBoxCommandKey, SIGNAL(toggled(bool)), mainwnd, SLOT(SetUseCommandControl(bool)));
 #else

freeview/Interactor.cpp

@@ -25,7 +25,7 @@
 #include <QDebug>
 
 #ifdef Q_OS_MAC
-Qt::KeyboardModifier Interactor::CONTROL_MODIFIER = Qt::MetaModifier;
+Qt::KeyboardModifier Interactor::CONTROL_MODIFIER = Qt::ControlModifier;
 Qt::Key Interactor::CONTROL_KEY = Qt::Key_Meta;
 #else
 Qt::KeyboardModifier Interactor::CONTROL_MODIFIER = Qt::ControlModifier;
@@ -53,7 +53,7 @@ void Interactor::SetAction( int nAction )
 void Interactor::SetUseCommandControl(bool b)
 {
 #ifdef Q_OS_MAC
-  if (b)
+  if (true)
   {
     CONTROL_MODIFIER = Qt::ControlModifier;
     CONTROL_KEY = Qt::Key_Control;