fixed a few usability issues

main.cpp

@@ -10,6 +10,8 @@ int main(int argc, char *argv[])
 	// init ffmpeg subsystem
     av_register_all();
 
+    QApplication::setAttribute(Qt::AA_ShareOpenGLContexts, true);
+
 	QApplication a(argc, argv);
 	MainWindow w;
 	w.show();

mainwindow.cpp

@@ -110,7 +110,7 @@ MainWindow::MainWindow(QWidget *parent) :
                     panel_project->load_project();
                 }
             }
-            autorecovery_timer.setInterval(60000);
+            autorecovery_timer.setInterval(10000);
             QObject::connect(&autorecovery_timer, SIGNAL(timeout()), this, SLOT(autorecover_interval()));
             autorecovery_timer.start();
 
@@ -291,13 +291,13 @@ void MainWindow::on_action_Paste_triggered()
 }
 
 void MainWindow::autorecover_interval() {
-    if (!project_changed) {
+    if (project_changed) {
         QString old_filename = project_url;
         project_url = autorecovery_filename;
         panel_project->save_project();
         qDebug() << "[INFO] Auto-recovery project saved";
         project_url = old_filename;
-        project_changed = false;
+        project_changed = true;
     }
 }
 

panels/project.cpp

@@ -198,8 +198,9 @@ void Project::delete_selected_media() {
                             confirm.setWindowTitle("Delete media in use?");
                             confirm.setText("The media '" + media->name + "' is currently used in '" + s->name + "'. Deleting it will remove all instances in the sequence. Are you sure you want to do this?");
                             QAbstractButton* yes_button = confirm.addButton(QMessageBox::Yes);
-                            QAbstractButton* skip_button = confirm.addButton("Skip", QMessageBox::NoRole);
-                            QAbstractButton* abort_button = confirm.addButton(QMessageBox::Abort);
+                            QAbstractButton* skip_button = NULL;
+                            if (items.size() > 1) skip_button = confirm.addButton("Skip", QMessageBox::NoRole);
+                            QAbstractButton* abort_button = confirm.addButton(QMessageBox::Cancel);
                             confirm.exec();
                             if (confirm.clickedButton() == yes_button) {
                                 // remove all clips referencing this media
@@ -885,7 +886,7 @@ void Project::add_recent_project(QString url) {
 #define THROBBER_LIMIT 20
 #define THROBBER_SIZE 50
 
-MediaThrobber::MediaThrobber(QTreeWidgetItem* i) : pixmap(":/icons/throbber.png"), item(i), animation(0) {
+MediaThrobber::MediaThrobber(QTreeWidgetItem* i) : pixmap(":/icons/throbber.png"), animation(0), item(i) {
     // set up throbber
     animation_update();
     animator.setInterval(20);

panels/timeline.cpp

@@ -77,7 +77,7 @@ void Timeline::go_to_start() {
 }
 
 void Timeline::previous_frame() {
-	seek(playhead-1);
+    if (playhead > 0) seek(playhead-1);
 }
 
 void Timeline::next_frame() {