sorta fixed some stuff

main.cpp

@@ -10,7 +10,7 @@ int main(int argc, char *argv[])
 	// init ffmpeg subsystem
     av_register_all();
 
-    QApplication::setAttribute(Qt::AA_ShareOpenGLContexts, true);
+//    QCoreApplication::setAttribute(Qt::AA_ShareOpenGLContexts, true);
 
 	QApplication a(argc, argv);
 	MainWindow w;

panels/timeline.cpp

@@ -908,7 +908,12 @@ bool Timeline::snap_to_point(long point, long* l) {
 void Timeline::snap_to_clip(long* l, bool playhead_inclusive) {
     snapped = false;
     if (snapping) {
-        if (!playhead_inclusive || !snap_to_point(playhead, l)) {
+        if (playhead_inclusive && !playing) {
+            playhead_inclusive = snap_to_point(playhead, l);
+        } else {
+            playhead_inclusive = false;
+        }
+        if (!playhead_inclusive) {
             for (int i=0;i<sequence->clip_count();i++) {
                 Clip* c = sequence->get_clip(i);
                 if (c != NULL) {

ui/timelinewidget.cpp

@@ -634,9 +634,12 @@ bool subvalidate_snapping(const Ghost& g, long* frame_diff, long snap_point) {
 }
 
 void validate_snapping(const Ghost& g, long* frame_diff) {
-    panel_timeline->snapped = false;
     if (panel_timeline->snapping) {
-        if (!subvalidate_snapping(g, frame_diff, panel_timeline->playhead)) {
+        bool snap_to_clip = true;
+        if (!panel_timeline->playing) {
+            snap_to_clip = !subvalidate_snapping(g, frame_diff, panel_timeline->playhead);
+        }
+        if (snap_to_clip) {
             for (int j=0;j<sequence->clip_count();j++) {
                 Clip* c = sequence->get_clip(j);
                 if (c != NULL) {
@@ -657,11 +660,13 @@ void TimelineWidget::update_ghosts(QPoint& mouse_pos) {
     long validator;
 
     // first try to snap
+    panel_timeline->snapped = false;
     if (panel_timeline->tool != TIMELINE_TOOL_SLIP) {
         // slipping doesn't move the clips so we don't bother snapping for it
         for (int i=0;i<panel_timeline->ghosts.size();i++) {
             Ghost& g = panel_timeline->ghosts[i];
             validate_snapping(g, &frame_diff);
+            if (panel_timeline->snapped) break;
         }
     }
 
@@ -789,7 +794,7 @@ void TimelineWidget::update_ghosts(QPoint& mouse_pos) {
     }
 
     // apply changes to selections
-    if (panel_timeline->tool != TIMELINE_TOOL_SLIP) {
+    if (panel_timeline->tool != TIMELINE_TOOL_SLIP && !panel_timeline->importing) {
         for (int i=0;i<panel_timeline->selections.size();i++) {
             Selection& s = panel_timeline->selections[i];
             if (panel_timeline->trim_target > -1) {

ui/viewerwidget.cpp

@@ -34,17 +34,38 @@ ViewerWidget::ViewerWidget(QWidget *parent) : QOpenGLWidget(parent) {
 	connect(&retry_timer, SIGNAL(timeout()), this, SLOT(retry()));
 }
 
+void ViewerWidget::deleteFunction() {
+    // destroy all textures as well
+    for (int i=0;i<sequence->clip_count();i++) {
+        Clip* c = sequence->get_clip(i);
+        if (c->texture != NULL) {
+            /* TODO NOTE: apparently "destroy()" is non-functional here because
+             * it requires a valid current context, and I guess it's no longer
+             * valid or current by the time this function is called. Not sure
+             * how to handle that just yet...
+             */
+
+            c->texture->destroy();
+            c->texture = NULL;
+        }
+    }
+}
+
 void ViewerWidget::retry() {
 	update();
 }
 
 void ViewerWidget::initializeGL() {
+    connect(context(), SIGNAL(aboutToBeDestroyed()), this, SLOT(deleteFunction()));
+
     initializeOpenGLFunctions();
 
     glClearColor(0, 0, 0, 1);
     glMatrixMode(GL_PROJECTION);
     glEnable(GL_TEXTURE_2D);
     glEnable(GL_BLEND);
+
+    update();
 }
 
 //void ViewerWidget::resizeGL(int w, int h)

ui/viewerwidget.h

@@ -32,6 +32,7 @@ private:
     QVector<qint16> samples;
 private slots:
 	void retry();
+    void deleteFunction();
 };
 
 #endif // VIEWERWIDGET_H