vastly improved multithreaded loading and annchor point gizmo

io/loadthread.h

@@ -4,12 +4,15 @@
 #include <QThread>
 #include <QDir>
 #include <QXmlStreamReader>
+#include <QMutex>
+#include <QWaitCondition>
 
 class Media;
 class Footage;
 class Clip;
 class Sequence;
 class LoadDialog;
+class EffectMeta;
 
 class LoadThread : public QThread
 {
@@ -17,15 +20,25 @@ class LoadThread : public QThread
 public:
     LoadThread(LoadDialog* l, bool a);
     void run();
+    void cancel();
 signals:
     void success();
+    void start_create_effect_ui(QXmlStreamReader* stream, Clip* c, int type, const EffectMeta* meta, long effect_length, bool effect_enabled);
+    void report_progress(int p);
 private slots:
     void success_func();
+    void create_effect_ui(QXmlStreamReader* stream, Clip* c, int type, const EffectMeta* meta, long effect_length, bool effect_enabled);
 private:
     LoadDialog* ld;
     bool autorecovery;
 
     bool load_worker(QFile& f, QXmlStreamReader& stream, int type);
+    void load_effect(QXmlStreamReader& stream, Clip* c);
+
+    void read_next(QXmlStreamReader& stream);
+    void read_next_start_element(QXmlStreamReader& stream);
+    void update_current_element_count(QXmlStreamReader& stream);
+
     Sequence* open_seq;
     QVector<Media*> loaded_media_items;
     QDir proj_dir;
@@ -34,10 +47,20 @@ private:
     bool show_err;
     QString error_str;
 
+    bool is_element(QXmlStreamReader& stream);
+
     QVector<Media*> loaded_folders;
     QVector<Clip*> loaded_clips;
     QVector<Media*> loaded_sequences;
     Media* find_loaded_folder_by_id(int id);
+
+    int current_element_count;
+    int total_element_count;
+
+    QMutex mutex;
+    QWaitCondition waitCond;
+
+    bool cancelled;
 };
 
 #endif // LOADTHREAD_H