library: drag and drop support

git-svn-id: http://svn.code.sf.net/p/qmmp-dev/code/trunk/qmmp@9616 90c681e8-e032-0410-971d-27865f9a5e38

3 files changed, 119 insertions, 4 deletions

diff --git a/src/plugins/General/library/librarymodel.cpp b/src/plugins/General/library/librarymodel.cpp
index b24e64e6a..511927391 100644
--- a/src/plugins/General/library/librarymodel.cpp
+++ b/src/plugins/General/library/librarymodel.cpp
@@ -22,6 +22,7 @@
 #include <QSqlQuery>
 #include <QSqlError>
 #include <QtDebug>
+#include <QMimeData>
 #include <qmmp/qmmp.h>
 #include "librarymodel.h"
 
@@ -60,6 +61,39 @@ LibraryModel::~LibraryModel()
     delete m_rootItem;
 }
 
+Qt::ItemFlags LibraryModel::flags(const QModelIndex &index) const
+{
+    if(index.isValid())
+        return QAbstractItemModel::flags(index) | Qt::ItemIsDragEnabled;
+    else
+        return QAbstractItemModel::flags(index);
+}
+
+QStringList LibraryModel::mimeTypes() const
+{
+    return QStringList("text/uri-list");
+}
+
+QMimeData *LibraryModel::mimeData(const QModelIndexList &indexes) const
+{
+    QList<QUrl> urls;
+
+    for(const QModelIndex &index : indexes)
+    {
+        if(index.isValid())
+            urls << getUrls(index);
+    }
+
+    if(!urls.isEmpty())
+    {
+        QMimeData *mimeData = new QMimeData;
+        mimeData->setUrls(urls);
+        return mimeData;
+    }
+
+    return nullptr;
+}
+
 bool LibraryModel::canFetchMore(const QModelIndex &parent) const
 {
     if(!parent.isValid())
@@ -128,8 +162,6 @@ void LibraryModel::fetchMore(const QModelIndex &parent)
             item->parent = parentItem;
             parentItem->children << item;
         }
-
-        qDebug() << parentItem->children.count();
     }
 }
 
@@ -219,3 +251,73 @@ void LibraryModel::refresh()
     }
     endResetModel();
 }
+
+QList<QUrl> LibraryModel::getUrls(const QModelIndex &index) const
+{
+    QSqlDatabase db = QSqlDatabase::database("qmmp_library_1");
+    QList<QUrl> urls;
+    if(!db.isOpen())
+        return urls;
+
+    const LibraryTreeItem *item = static_cast<const LibraryTreeItem *>(index.internalPointer());
+
+    if(item->type == Qmmp::TITLE)
+    {
+        QSqlQuery query(db);
+        query.prepare("SELECT URL from track_library WHERE Artist = :artist AND Album = :album AND Title = :title");
+        query.bindValue(":artist", item->parent->parent->name);
+        query.bindValue(":album", item->parent->name);
+        query.bindValue(":title", item->name);
+
+        if(!query.exec())
+        {
+            qWarning("Library: exec error: %s", qPrintable(query.lastError().text()));
+            return urls;
+        }
+
+        if(query.next())
+        {
+            QString path = query.value("URL").toString();
+            urls << (path.contains("://") ? QUrl(path) : QUrl::fromLocalFile(path));
+        }
+    }
+    else if(item->type == Qmmp::ALBUM)
+    {
+        QSqlQuery query(db);
+        query.prepare("SELECT URL from track_library WHERE Artist = :artist AND Album = :album");
+        query.bindValue(":artist", item->parent->name);
+        query.bindValue(":album", item->name);
+
+        if(!query.exec())
+        {
+            qWarning("Library: exec error: %s", qPrintable(query.lastError().text()));
+            return urls;
+        }
+
+        while(query.next())
+        {
+            QString path = query.value("URL").toString();
+            urls << (path.contains("://") ? QUrl(path) : QUrl::fromLocalFile(path));
+        }
+    }
+    else if(item->type == Qmmp::ARTIST)
+    {
+        QSqlQuery query(db);
+        query.prepare("SELECT URL from track_library WHERE Artist = :artist");
+        query.bindValue(":artist", item->name);
+
+        if(!query.exec())
+        {
+            qWarning("Library: exec error: %s", qPrintable(query.lastError().text()));
+            return urls;
+        }
+
+        while(query.next())
+        {
+            QString path = query.value("URL").toString();
+            urls << (path.contains("://") ? QUrl(path) : QUrl::fromLocalFile(path));
+        }
+    }
+
+    return urls;
+}
diff --git a/src/plugins/General/library/librarymodel.h b/src/plugins/General/library/librarymodel.h
index a13081bdd..a06365330 100644
--- a/src/plugins/General/library/librarymodel.h
+++ b/src/plugins/General/library/librarymodel.h
@@ -23,6 +23,7 @@
 
 #include <QObject>
 #include <QStringList>
+#include <QUrl>
 #include <QAbstractItemModel>
 
 class QSqlDatabase;
@@ -35,6 +36,9 @@ public:
     LibraryModel(QObject *parent = nullptr);
     ~LibraryModel();
 
+    Qt::ItemFlags flags(const QModelIndex &index) const;
+    QStringList mimeTypes() const override;
+    QMimeData *mimeData(const QModelIndexList &indexes) const override;
     bool canFetchMore(const QModelIndex &parent) const override;
     void fetchMore(const QModelIndex &parent) override;
     QVariant data(const QModelIndex &index, int role = Qt::DisplayRole) const override;
@@ -42,12 +46,12 @@ public:
     QModelIndex index(int row, int column, const QModelIndex &parent = QModelIndex()) const override;
     int columnCount(const QModelIndex &parent = QModelIndex()) const override;
     int rowCount(const QModelIndex &parent = QModelIndex()) const override;
-
     void refresh();
 
 private:
-    LibraryTreeItem *m_rootItem;
+    QList<QUrl> getUrls(const QModelIndex &index) const;
 
+    LibraryTreeItem *m_rootItem;
 };
 
 #endif // LIBRARYMODEL_H
diff --git a/src/plugins/General/library/librarywidget.ui b/src/plugins/General/library/librarywidget.ui
index 830180bb5..54c9b0b71 100644
--- a/src/plugins/General/library/librarywidget.ui
+++ b/src/plugins/General/library/librarywidget.ui
@@ -25,6 +25,15 @@
    </property>
    <item>
     <widget class="QTreeView" name="treeView">
+     <property name="dragEnabled">
+      <bool>true</bool>
+     </property>
+     <property name="dragDropMode">
+      <enum>QAbstractItemView::DragOnly</enum>
+     </property>
+     <property name="selectionMode">
+      <enum>QAbstractItemView::ExtendedSelection</enum>
+     </property>
      <attribute name="headerVisible">
       <bool>false</bool>
      </attribute>