Implemented hovering in FilesystemWidget

Hovering over dirs and pictures show either the content of the directory
or a scaled image of the picture. This is a strange commit, though. When
the archive was the last opened tab the program crashes when changing to
FilesystemView. I don't have the slightest clue, why, so I simply
removed setting the last opened tab on startup.

Also there is some strange behavior regarding the position of the
HoverWindow and what Qt thinks the global position is...

1 files changed, 94 insertions, 8 deletions

diff --git a/fileview.cpp b/fileview.cpp
index 7853504..2da9bc6 100644
--- a/fileview.cpp
+++ b/fileview.cpp
@@ -15,11 +15,22 @@
 #include <QSortFilterProxyModel>
 #include <QAction>
 #include <QApplication>
+#include <QEvent>
+#include <QSettings>
+#include <QModelIndex>
+#include <QFileInfo>
+#include <QVariant>
+#include <QList>
+#include <QDir>
 
 #include "fileview.h"
 #include "messagedialog.h"
+#include "hoverwindow.h"
+#include "smglobals.h"
+#include "helper.h"
 
 FileView::FileView(QWidget *parent) : QTreeView(parent), mDeleteA(0) {
+	setAttribute(Qt::WA_Hover);
 	setRootIsDecorated(false);
 	QString title = QString("%1 - %2");
 	QString markTitle = title.arg(qApp->applicationName(), tr("Mark files"));
@@ -28,6 +39,7 @@ FileView::FileView(QWidget *parent) : QTreeView(parent), mDeleteA(0) {
 	QString folderTitle = title.arg(qApp->applicationName(), tr("Create folder"));
 	mCreateFolderDialog = new MessageDialog(tr("Enter folder name"), folderTitle, this);
 	connect(mCreateFolderDialog, SIGNAL(accepted()), this, SLOT(doCreateFolder()));
+	mHoverWin = new HoverWindow;
 }
 
 void FileView::markFiles(){
@@ -42,14 +54,6 @@ void FileView::createFolder(){
 	mCreateFolderDialog->show();
 }
 
-/*void FileView::refresh(){
-	QSortFilterProxyModel *proxy = static_cast<QSortFilterProxyModel*>(model());
-	QFileSystemModel *model = static_cast<QFileSystemModel*>(proxy->sourceModel());
-	QModelIndex root = rootIndex();
-	QModelIndex real = proxy->mapToSource(root);
-	model->refresh(root);
-}*/
-
 void FileView::doMark(){
 	int rowCount = model()->rowCount(rootIndex());
 	QString sRegex = mMarkDialog->text();
@@ -134,3 +138,85 @@ void FileView::resizeEvent(QResizeEvent *e){
 	}
 }
 
+bool FileView::event(QEvent *e){
+	QSettings s;
+	if(!s.value("ui/hoverpics").toBool()){
+		return true;
+	}
+
+	if(e->type() == QEvent::HoverLeave){
+		mHoverWin->setVisible(false);
+		mCurHover = QModelIndex();
+		return true;
+	}
+
+	QHoverEvent *hEvent = static_cast<QHoverEvent*>(e);
+	QPoint hotSpot(hEvent->pos().x(), hEvent->pos().y() - SmGlobals::instance()->cursorOffset());
+	QModelIndex curIdx = indexAt(hotSpot);
+
+	if(!curIdx.isValid()){
+		return true;
+	}
+	if(curIdx.column() != 0){
+		mHoverWin->setVisible(false);
+		return true;
+	}
+
+	QFileInfo fi(curIdx.data(QFileSystemModel::FilePathRole).toString());
+	if(!fi.exists()){
+		return true;
+	}
+
+	QList<QVariant> hoverData;
+	if(fi.isDir()){
+		hoverData << fi.fileName();
+		QDir curDir(fi.absoluteFilePath());
+		QStringList files = curDir.entryList(QDir::AllEntries | QDir::NoDotAndDotDot, QDir::Name);
+		hoverData << files;
+	}else if(fi.isFile()){
+		QString mimeType = Helper::mimeType(fi.absoluteFilePath());
+		if(mimeType.startsWith("image")){
+			QPixmap pm(fi.absoluteFilePath());
+			hoverData << pm;
+		}else{
+			mHoverWin->setVisible(false);
+			return true;
+		}
+	}else{
+		mHoverWin->setVisible(false);
+		return true;
+	}
+
+	QPoint globalPos = mapToGlobal(hotSpot);
+	QPoint where = globalPos + QPoint(30, 0);
+	if(e->type() == QEvent::HoverEnter){
+		mCurHover = curIdx;
+		mHoverWin->setData(hoverData);
+		if(mHoverWin->pixmapHeight()){
+			where = QPoint(where.x(), where.y() - mHoverWin->pixmapHeight() / 2);
+		}
+		mHoverWin->setPos(where);
+		mHoverWin->setVisible(true);
+		return true;
+	}
+	if(e->type() == QEvent::HoverMove){
+		if(curIdx != mCurHover){
+			mCurHover = curIdx;
+			mHoverWin->setData(hoverData);
+			if(mHoverWin->pixmapHeight()){
+				where = QPoint(where.x(), where.y() - mHoverWin->pixmapHeight() / 2);
+			}
+			mHoverWin->setVisible(false);
+			mHoverWin->setPos(where);
+			mHoverWin->setVisible(true);
+			return true;
+		}else{
+			if(mHoverWin->pixmapHeight()){
+				where = QPoint(where.x(), where.y() - mHoverWin->pixmapHeight() / 2);
+			}
+			mHoverWin->setPos(where);
+			return true;
+		}
+	}
+	return QTreeView::event(e);
+}