Implement hover over movies

What started as an attempt to show a frame from a movie when hovering
over it, ended in a huge bugfix commit for hover related stuff. This
commit is definitely not atomic.

When hovering over a movie present on the filesytem a frame is shown.
The time frame is configurable. While digging into the code I noticed
some bugs.

Bugfixes:
* fix label for hove archive action. It was labeled for hovering over
directories in FSWidget.
* Hovering over directories didn't have an action. Also read the
appropriate value from QSettings.

Other:
* add icons for hovering over directories and hovering over movies
* replace SheMov::toggleHover(pics|some other) with a QSignalMapper

1 files changed, 38 insertions, 20 deletions

diff --git a/filestreewidget.cpp b/filestreewidget.cpp
index 941c7ac..4dd5308 100644
--- a/filestreewidget.cpp
+++ b/filestreewidget.cpp
@@ -288,9 +288,8 @@ void FilesTreeWidget::fileSelectionChanged(const QItemSelection &selected, const
 	emit sizeChanged(mSelectedSize);
 }
 
-FilesTreeView::FilesTreeView(QWidget *parent) : QTreeView(parent), mHoverWin(new HoverWindow), mHover(false){
+FilesTreeView::FilesTreeView(QWidget *parent) : QTreeView(parent), mHoverWin(new HoverWindow), mHoverPics(false){
 	setAttribute(Qt::WA_Hover);
-
 }
 
 void FilesTreeView::setModel(QAbstractItemModel *model){
@@ -303,8 +302,9 @@ void FilesTreeView::setModel(QAbstractItemModel *model){
 
 void FilesTreeView::readConfig(){
 	QSettings s;
-	mHover = s.value("ui/hoverpics", true).toBool();
+	mHoverPics = s.value("ui/hoverpics", true).toBool();
 	mHoverWin->setWindowOpacity(s.value("ui/hoveropacity", 10).toFloat() / 10.0);
+	mHoverMovies = s.value("ui/hovermovies", true).toBool();
 }
 
 void FilesTreeView::readHeaderConfig(){
@@ -341,39 +341,39 @@ bool FilesTreeView::event(QEvent *e){
 	if(!hEvent){
 		return QTreeView::event(e);
 	}
-	if(!mHover){
-		return true;
-	}
 	QPoint hotSpot(hEvent->pos().x(), hEvent->pos().y() - SmGlobals::instance()->cursorSize().height());
 	QModelIndex curIdx = indexAt(hotSpot);
+	/*
+		The whole point of this if/then/else mess is to exit as early as possible
+		for performance reasons. We don't want the cpu to spin at 100% only
+		because something _could_ happen...
+	 */
 	if((e->type() == QEvent::HoverEnter) || (e->type() == QEvent::HoverMove)){
 		if(!curIdx.isValid() || (!curIdx.column() == 0)){
 			return exitHover();
 		}
 		bool toInt;
 		int fileType = curIdx.data(FilesTreeModel::FileTypeRole).toInt(&toInt);
-		bool validFt = false;
-		if(toInt){
-			validFt = (fileType == FilesTreeModel::FrontCover) || (fileType == FilesTreeModel::BackCover) || (fileType == FilesTreeModel::GeneralCover);
-		}
-		if(!toInt || !validFt){
+		if(!toInt){
 			return exitHover();
 		}
+		if(fileType == FilesTreeModel::Movie){
+			if(!mHoverMovies){
+				return exitHover();
+			}
+		}else{
+			if(!mHoverPics){
+				return exitHover();
+			}
+		}
 	}
 	if(e->type() == QEvent::HoverEnter){
-		mCurHover = curIdx;
-		QPixmap pm = QPixmap(curIdx.data(FilesTreeModel::FullPathRole).toString());
-		mHoverWin->setPixmap(pm);
-		mHoverWin->setPos();
-		mHoverWin->setVisible(true);
+		doHover(curIdx);
 		return true;
 	}
 	if(e->type() == QEvent::HoverMove){
 		if(curIdx != mCurHover){
-			mCurHover = curIdx;
-			mHoverWin->setPixmap(QPixmap(curIdx.data(FilesTreeModel::FullPathRole).toString()));
-			mHoverWin->setPos();
-			mHoverWin->setVisible(true);
+			doHover(curIdx);
 			return true;
 		}else{
 			mHoverWin->setPos();
@@ -392,6 +392,24 @@ bool FilesTreeView::exitHover(bool exitVal){
 	return exitVal;
 }
 
+void FilesTreeView::doHover(const QModelIndex &idx){
+	QPixmap pm;
+	mCurHover = idx;
+	if(idx.data(FilesTreeModel::FileTypeRole).toInt() == FilesTreeModel::Movie){
+		pm = Helper::grabFrame(idx.data(FilesTreeModel::FullPathRole).toString());
+		if(pm.isNull()){
+			return;
+		}
+	}else{
+		if(!pm.load(idx.data(FilesTreeModel::FullPathRole).toString())){
+			return;
+		}
+	}
+	mHoverWin->setPixmap(pm);
+	mHoverWin->setPos();
+	mHoverWin->setVisible(true);
+}
+
 FilesTreeSortModel::FilesTreeSortModel(QObject *parent) : QSortFilterProxyModel(parent) {}
 
 // left + right are from the sourceModel() !!!!