Add/remove/drag&drop for the icon picker.

logic/IconListModel.cpp

@@ -3,7 +3,8 @@
 #include <QMap>
 #include <QEventLoop>
 #include <QDir>
-
+#include <QMimeData>
+#include <QUrl>
 #define MAX_SIZE 1024
 IconList* IconList::m_Instance = 0;
 QMutex IconList::mutex;
@@ -14,6 +15,7 @@ struct entry
 	QString name;
 	QIcon icon;
 	bool is_builtin;
+	QString filename;
 };
 
 class Private : public QObject
@@ -56,6 +58,61 @@ IconList::~IconList()
 	d = nullptr;
 }
 
+QStringList IconList::mimeTypes() const
+{
+	QStringList types;
+	types << "text/uri-list";
+	return types;
+}
+Qt::DropActions IconList::supportedDropActions() const
+{
+	return Qt::CopyAction;
+}
+
+bool IconList::dropMimeData ( const QMimeData* data, Qt::DropAction action, int row, int column, const QModelIndex& parent )
+{
+	if (action == Qt::IgnoreAction)
+        return true;
+	// check if the action is supported
+	if (!data || !(action & supportedDropActions()))
+		return false;
+
+	// files dropped from outside?
+	if(data->hasUrls())
+	{
+		/*
+		bool was_watching = is_watching;
+		if(was_watching)
+			stopWatching();
+		*/
+		auto urls = data->urls();
+		QStringList iconFiles;
+		for(auto url: urls)
+		{
+			// only local files may be dropped...
+			if(!url.isLocalFile())
+				continue;
+			iconFiles += url.toLocalFile();
+		}
+		installIcons(iconFiles);
+		/*
+		if(was_watching)
+			startWatching();
+		*/
+		return true;
+	}
+	return false;
+}
+
+Qt::ItemFlags IconList::flags ( const QModelIndex& index ) const
+{
+	Qt::ItemFlags defaultFlags = QAbstractListModel::flags ( index );
+	if (index.isValid())
+		return Qt::ItemIsDropEnabled | defaultFlags;
+	else
+		return Qt::ItemIsDropEnabled | defaultFlags;
+}
+
 QVariant IconList::data ( const QModelIndex& index, int role ) const
 {
 	if(!index.isValid())
@@ -84,18 +141,65 @@ int IconList::rowCount ( const QModelIndex& parent ) const
 	return d->icons.size();
 }
 
+void IconList::installIcons ( QStringList iconFiles )
+{
+	for(QString file: iconFiles)
+	{
+		QFileInfo fileinfo(file);
+		if(!fileinfo.isReadable() || !fileinfo.isFile())
+			continue;
+		QString target = PathCombine("icons", fileinfo.fileName());
+		
+		QString suffix = fileinfo.suffix();
+		if(suffix != "jpeg" && suffix != "png" && suffix != "jpg")
+			continue;
+		
+		if(!QFile::copy(file, target))
+			continue;
+		
+		QString key = fileinfo.baseName();
+		addIcon(key, key, target);
+	}
+}
+
+bool IconList::deleteIcon ( QString key )
+{
+	int iconIdx = getIconIndex(key);
+	if(iconIdx == -1)
+		return false;
+	auto & iconEntry = d->icons[iconIdx];
+	if(iconEntry.is_builtin)
+		return false;
+	if(QFile::remove(iconEntry.filename))
+	{
+		beginRemoveRows(QModelIndex(), iconIdx, iconIdx);
+		d->icons.remove(iconIdx);
+		reindex();
+		endRemoveRows();
+	}
+	return true;
+}
+
 bool IconList::addIcon ( QString key, QString name, QString path, bool is_builtin )
 {
 	auto iter = d->index.find(key);
 	if(iter != d->index.end())
 	{
-		if(d->icons[*iter].is_builtin) return false;
+		if(d->icons[*iter].is_builtin)
+			return false;
 		
 		QIcon icon(path);
-		if(icon.isNull()) return false;
+		if(icon.isNull())
+			return false;
 		
+		auto & oldOne = d->icons[*iter];
+		
+		if(!QFile::remove(oldOne.filename))
+			return false;
+
 		// replace the icon
-		d->icons[*iter] = {key, name, icon, is_builtin};
+		oldOne = {key, name, icon, is_builtin, path};
+		dataChanged(index(*iter),index(*iter));
 		return true;
 	}
 	else
@@ -104,12 +208,25 @@ bool IconList::addIcon ( QString key, QString name, QString path, bool is_builti
 		if(icon.isNull()) return false;
 		
 		// add a new icon
-		d->icons.push_back({key, name, icon, is_builtin});
+		beginInsertRows(QModelIndex(), d->icons.size(),d->icons.size());
+		d->icons.push_back({key, name, icon, is_builtin, path});
 		d->index[key] = d->icons.size() - 1;
+		endInsertRows();
 		return true;
 	}
 }
 
+void IconList::reindex()
+{
+	d->index.clear();
+	int i = 0;
+	for(auto& iter: d->icons)
+	{
+		d->index[iter.key] = i;
+		i++;
+	}
+}
+
 
 QIcon IconList::getIcon ( QString key )
 {

logic/IconListModel.h

@@ -18,7 +18,14 @@ public:
 	virtual int rowCount ( const QModelIndex& parent = QModelIndex() ) const;
 	
 	bool addIcon(QString key, QString name, QString path, bool is_builtin = false);
+	bool deleteIcon(QString key);
 	
+	virtual QStringList mimeTypes() const;
+	virtual Qt::DropActions supportedDropActions() const;
+	virtual bool dropMimeData ( const QMimeData* data, Qt::DropAction action, int row, int column, const QModelIndex& parent );
+	virtual Qt::ItemFlags flags ( const QModelIndex& index ) const;
+	
+	void installIcons ( QStringList iconFiles );
 	
 private:
 	virtual ~IconList();
@@ -27,6 +34,7 @@ private:
 	IconList ( const IconList & ) = delete;
 	// hide assign op
 	IconList& operator= ( const IconList & ) = delete;
+	void reindex();
 	static IconList* m_Instance;
 	static QMutex mutex;
 	Private* d;