Fix setAlternatignRowColors

Well, what started as a try to simplify QTreeView ended in a mass header
murder...

What happened:
* I searched for a way to let every QTreeView honor the
setAlternatingRowcolors() setting. Unfortunately it isn't enough to just
set the global palette and set it to true. So every QTreeView is now
derived from SmTreeView
* SmTreeView registers itself with SmGlobals, so the property is set
_after_ it's constructed. It's definitely not enough to call it in the
constructor. I guess that's a bug. But it's enough to append the
SmTreeView to a QList<QWidget*> in SmGlobals and call it _after_ the
painting is done.
* As an added Bonus we can add virt. funcs to every SmTreeView at will

While at it I realized that most of the included headers were void, so
remove them. No idea what impact it has on the bin size...

1 files changed, 5 insertions, 13 deletions

diff --git a/filesystemwidget.h b/filesystemwidget.h
index eaa6348..62c42db 100644
--- a/filesystemwidget.h
+++ b/filesystemwidget.h
@@ -9,25 +9,17 @@
 #define FILESYSTEMWIDGET_H
 
 #include <QtWidgets/QWidget>
-#include <QPair>
 #include <QtWidgets/QFileSystemModel>
-#include <QHash>
 #include <QSqlDatabase>
 #include <QDateTime>
 
-class QTreeView;
+class SmTreeView;
 class FilesystemDirProxy;
 class FileView;
-class QModelIndex;
 class FilesystemFileProxy;
 class QLineEdit;
-class QFileInfo;
-class QAction;
-class QVariant;
 class PictureViewer2;
-class QStringList;
 class FileSystemModel;
-class QSqlQuery;
 class SheMovIconProvider;
 class SmDirModel;
 
@@ -39,7 +31,7 @@ class FilesystemWidget : public QWidget {
 		~FilesystemWidget() {}
 		FileView *fileView() { return mFileView; }
 		FilesystemFileProxy *fileProxy() { return mFileProxy; }
-		FileSystemModel *dirModel() { return mModel; }
+        FileSystemModel *dirModel() { return mModel; }
         SmDirModel *fileModel() { return mFileModel; }
 		const QString windowTitle() const { return mWindowTitle; }
         PictureViewer2 *pictureViewer() { return mPicViewer; }
@@ -84,9 +76,9 @@ class FilesystemWidget : public QWidget {
 		QPair<QString, QStringList> programData(const QString &prefix, const QString &preferred);
 		QStringList selectedFiles();
 		QStringList mExpandedDirs;
-		FileSystemModel *mModel;
+        FileSystemModel *mModel;
         SmDirModel *mFileModel;
-		QTreeView *mDirView;
+        SmTreeView *mDirView;
 		FileView *mFileView;
 		FilesystemDirProxy *mDirProxy;
 		FilesystemFileProxy *mFileProxy;
@@ -104,7 +96,7 @@ class FileSystemModel : public QFileSystemModel {
 	Q_OBJECT
 	public:
 		FileSystemModel(QObject *parent = 0);
-        ~FileSystemModel() {};
+        ~FileSystemModel() {}
 
 	public slots:
 		void markForClipboard(const QPersistentModelIndex &idx);