Implemented hover for SeriesTreeWidget

SeriesTreeWidget show a popup window with the movies assigned to the
series when hovering over a series entry.

3 files changed, 121 insertions, 2 deletions

diff --git a/seriestreewidget.cpp b/seriestreewidget.cpp
index e717b13..791fb9e 100644
--- a/seriestreewidget.cpp
+++ b/seriestreewidget.cpp
@@ -22,6 +22,14 @@
 #include <QFileInfo>
 #include <QComboBox>
 #include <QFile>
+#include <QEvent>
+#include <QHoverEvent>
+#include <QPaintEvent>
+#include <QPainter>
+
+#include <QX11Info>
+#include <X11/Xlib.h>
+#include <X11/extensions/Xfixes.h>
 
 #include "seriestreewidget.h"
 #include "smtreemodel.h"
@@ -310,7 +318,13 @@ void SeriesTreeWidget::addCover(){
 	}
 }
 
-SeriesTreeView::SeriesTreeView(QWidget *parent) : QTreeView(parent) {}
+SeriesTreeView::SeriesTreeView(QWidget *parent) : QTreeView(parent), mCursorOffset(0) {
+	setAttribute(Qt::WA_Hover);
+	mHoverWin = new SeriesTreeHoverWindow;
+	XFixesCursorImage *curImage = XFixesGetCursorImage(QX11Info::display());
+	mCursorOffset = curImage->height;
+	XFree(curImage);
+}
 
 void SeriesTreeView::contextMenuEvent(QContextMenuEvent *e){
 	QMenu contextMenu(this);
@@ -320,6 +334,91 @@ void SeriesTreeView::contextMenuEvent(QContextMenuEvent *e){
 	contextMenu.exec(e->globalPos());
 }
 
+bool SeriesTreeView::event(QEvent *e){
+	QModelIndex curIdx;
+	QHoverEvent *hEvent = static_cast<QHoverEvent*>(e);
+	QPoint hotSpot(hEvent->pos().x(), hEvent->pos().y() - mCursorOffset);
+	QPoint globalPos = mapToGlobal(hotSpot);
+	QPoint where = globalPos + QPoint(30, 30);
+
+	curIdx = indexAt(hotSpot);
+	if((e->type() == QEvent::HoverEnter) || (e->type() == QEvent::HoverMove)){
+		if(!curIdx.isValid()){
+			return false;
+		}
+		if(curIdx.parent() != QModelIndex()){
+			mHoverWin->setVisible(false);
+			mCurHover = QModelIndex();
+			return false;
+		}
+	}
+
+	if(e->type() == QEvent::HoverEnter){
+		mCurHover = curIdx;
+		mHoverWin->setContent(curIdx.data(Qt::DisplayRole).toString(), children(curIdx));
+		mHoverWin->move(where);
+		mHoverWin->setVisible(true);
+		return true;
+	}
+	if(e->type() == QEvent::HoverMove){
+		if(curIdx != mCurHover){
+			mCurHover = curIdx;
+			mHoverWin->setContent(curIdx.data(Qt::DisplayRole).toString(), children(curIdx));
+			mHoverWin->setVisible(false);
+			mHoverWin->move(where);
+			mHoverWin->setVisible(true);
+			return true;
+		}else{
+			mHoverWin->move(where);
+			return true;
+		}
+	}
+	if(e->type() == QEvent::HoverLeave){
+		mHoverWin->setVisible(false);
+		return true;
+	}
+	return QTreeView::event(e);
+}
+
+QStringList SeriesTreeView::children(const QModelIndex &idx) const{
+	if(!idx.isValid()){
+		return QStringList();
+	}
+	QStringList retval;
+	QModelIndex curIdx = idx.child(0,0);
+	while(curIdx.isValid()){
+		retval << curIdx.data(Qt::DisplayRole).toString();
+		curIdx = idx.model()->index(curIdx.row() + 1, curIdx.column(), curIdx.parent());
+	}
+	return retval;
+}
+
+SeriesTreeHoverWindow::SeriesTreeHoverWindow(QWidget *parent, Qt::WindowFlags f) : QWidget(parent, f){
+	setVisible(false);
+	setWindowOpacity(0.7);
+	setStyleSheet("QLabel { background-color: #D6A583; color: black; border-width: 2px; border-style: solid; padding: 4px; }");
+	QHBoxLayout *mainLayout = new QHBoxLayout;
+	mainLayout->setContentsMargins(4, 4, 4, 4);
+	mLabel = new QLabel;
+	mainLayout->addWidget(mLabel);
+	setLayout(mainLayout);
+}
+
+void SeriesTreeHoverWindow::setContent(const QString &parent, const QStringList &children){
+	QString curText = QString("<p style=\"align: center; text-decoration: underline; font-weight: bold; margin-bottom: 0;\">%1</p>").arg(parent);
+	curText.append("<ul style=\"margin-left: -25; margin-top: 0px;\">");
+	int count = qMin(6, children.size());
+	int i = 0;
+	for(i = 0; i < count; ++i){
+		curText.append(QString("<li>%1</li>").arg(children.at(i)));
+	}
+	if(i < children.count()){
+		curText.append("<li>...</li>");
+	}
+	curText.append("</ul>");
+	mLabel->setText(curText);
+}
+
 SeriesTreeSortModel::SeriesTreeSortModel(QObject *parent) : QSortFilterProxyModel(parent) {}
 
 bool SeriesTreeSortModel::lessThan(const QModelIndex &left, const QModelIndex &right) const{
diff --git a/seriestreewidget.h b/seriestreewidget.h
index a917501..4532ddb 100644
--- a/seriestreewidget.h
+++ b/seriestreewidget.h
@@ -17,9 +17,12 @@ class QLineEdit;
 class QPushButton;
 class QSortFilterProxyModel;
 class QComboBox;
+class QEvent;
+class QLabel;
 class SeriesTreeModel;
 class SeriesTreeView;
 class SeriesTreeSortModel;
+class SeriesTreeHoverWindow;
 class FilesTreeModel;
 class AddCoverDialog;
 
@@ -69,6 +72,23 @@ class SeriesTreeView : public QTreeView {
 
 	protected:
 		virtual void contextMenuEvent(QContextMenuEvent *e);
+		virtual bool event(QEvent *event);
+
+	private:
+		QStringList children(const QModelIndex &idx) const;
+		QModelIndex mCurHover;
+		SeriesTreeHoverWindow *mHoverWin;
+		int mCursorOffset;
+};
+
+class SeriesTreeHoverWindow : public QWidget {
+	Q_OBJECT
+	public:
+		explicit SeriesTreeHoverWindow(QWidget *parent = 0, Qt::WindowFlags f = Qt::FramelessWindowHint);
+		void setContent(const QString &parent, const QStringList &children);
+
+	private:
+		QLabel *mLabel;
 };
 
 class SeriesTreeSortModel : public QSortFilterProxyModel {
diff --git a/shemov.pro b/shemov.pro
index a58d4ca..dc3cc47 100644
--- a/shemov.pro
+++ b/shemov.pro
@@ -60,5 +60,5 @@ HEADERS = listitem.h \
     mappingtablewidget.h \
     newmoviewizard.h \
     filepropertiesdialog.h
-LIBS += -lmagic
+LIBS += -lmagic -lXfixes
 RESOURCES = shemov.qrc