project: improved main window layout loading

There were a lot of issues that arose from trying to make GUI changes
from another thread (even though we ran those functions in the right
thread). Now we store layout information until the end of the load and
make the changes then. This works much better from both a business logic
and user experience perspective.

Also prevents multiple sequences from taking focus during load and
starting a render job.

app/window/mainwindow/mainwindowlayoutinfo.cpp

@@ -0,0 +1,96 @@
+#include "mainwindowlayoutinfo.h"
+
+OLIVE_NAMESPACE_ENTER
+
+void MainWindowLayoutInfo::toXml(QXmlStreamWriter *writer) const
+{
+  writer->writeStartElement(QStringLiteral("layout"));
+
+  writer->writeStartElement(QStringLiteral("folders"));
+
+  foreach (Folder* folder, open_folders_) {
+    writer->writeTextElement(QStringLiteral("folder"),
+                             QString::number(reinterpret_cast<quintptr>(folder)));
+  }
+
+  writer->writeEndElement(); // folders
+
+  writer->writeStartElement(QStringLiteral("timeline"));
+
+  foreach (Sequence* sequence, open_sequences_) {
+    writer->writeTextElement(QStringLiteral("sequence"),
+                             QString::number(reinterpret_cast<quintptr>(sequence)));
+  }
+
+  writer->writeEndElement(); // timeline
+
+  writer->writeTextElement(QStringLiteral("state"), QString(state_.toBase64()));
+
+  writer->writeEndElement(); // layout
+}
+
+MainWindowLayoutInfo MainWindowLayoutInfo::fromXml(QXmlStreamReader *reader, XMLNodeData &xml_data)
+{
+  MainWindowLayoutInfo info;
+
+  while (XMLReadNextStartElement(reader)) {
+    if (reader->name() == QStringLiteral("folders")) {
+
+      while (XMLReadNextStartElement(reader)) {
+        if (reader->name() == QStringLiteral("folder")) {
+          quintptr item_id = reader->readElementText().toULongLong();
+
+          Item* open_item = xml_data.item_ptrs.value(item_id);
+
+          if (open_item) {
+            info.open_folders_.append(static_cast<Folder*>(open_item));
+          }
+        } else {
+          reader->skipCurrentElement();
+        }
+      }
+
+    } else if (reader->name() == QStringLiteral("timeline")) {
+
+      while (XMLReadNextStartElement(reader)) {
+        if (reader->name() == QStringLiteral("sequence")) {
+          quintptr item_id = reader->readElementText().toULongLong();
+
+          Sequence* open_seq = dynamic_cast<Sequence*>(xml_data.item_ptrs.value(item_id));
+
+          if (open_seq) {
+            info.open_sequences_.append(open_seq);
+          }
+        } else {
+          reader->skipCurrentElement();
+        }
+      }
+
+    } else if (reader->name() == QStringLiteral("state")) {
+
+      info.state_ = QByteArray::fromBase64(reader->readElementText().toLatin1());
+
+    } else {
+      reader->skipCurrentElement();
+    }
+  }
+
+  return info;
+}
+
+void MainWindowLayoutInfo::add_folder(olive::Folder *f)
+{
+  open_folders_.append(f);
+}
+
+void MainWindowLayoutInfo::add_sequence(Sequence *s)
+{
+  open_sequences_.append(s);
+}
+
+void MainWindowLayoutInfo::set_state(const QByteArray &layout)
+{
+  state_ = layout;
+}
+
+OLIVE_NAMESPACE_EXIT