implement entire project in nodes

Project items are now represented directly in nodes opening up more versatility and possibilities. This is the first iteration of this and will be buggy. Need to test thoroughly.

app/widget/filefield/CMakeLists.txt

@@ -0,0 +1,22 @@
+# Olive - Non-Linear Video Editor
+# Copyright (C) 2020 Olive Team
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+set(OLIVE_SOURCES
+  ${OLIVE_SOURCES}
+  widget/filefield/filefield.cpp
+  widget/filefield/filefield.h
+  PARENT_SCOPE
+)

app/widget/filefield/filefield.cpp

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+/***
+
+  Olive - Non-Linear Video Editor
+  Copyright (C) 2020 Olive Team
+
+  This program is free software: you can redistribute it and/or modify
+  it under the terms of the GNU General Public License as published by
+  the Free Software Foundation, either version 3 of the License, or
+  (at your option) any later version.
+
+  This program is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  GNU General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+***/
+
+#include "filefield.h"
+
+#include <QFileDialog>
+#include <QFileInfo>
+#include <QHBoxLayout>
+
+#include "ui/icons/icons.h"
+
+namespace olive {
+
+FileField::FileField(QWidget* parent) :
+  QWidget(parent)
+{
+  QHBoxLayout* layout = new QHBoxLayout(this);
+
+  layout->setSpacing(0);
+  layout->setMargin(0);
+
+  line_edit_ = new QLineEdit();
+  connect(line_edit_, &QLineEdit::textChanged, this, &FileField::LineEditChanged);
+  layout->addWidget(line_edit_);
+
+  browse_btn_ = new QPushButton();
+  browse_btn_->setIcon(icon::Open);
+  connect(browse_btn_, &QPushButton::clicked, this, &FileField::BrowseBtnClicked);
+  layout->addWidget(browse_btn_);
+}
+
+void FileField::BrowseBtnClicked()
+{
+  QString s = QFileDialog::getOpenFileName(this, tr("Open File"));
+
+  if (!s.isEmpty()) {
+    line_edit_->setText(s);
+  }
+}
+
+void FileField::LineEditChanged(const QString& text)
+{
+  if (QFileInfo::exists(text)) {
+    line_edit_->setStyleSheet(QString());
+  } else {
+    line_edit_->setStyleSheet(QStringLiteral("QLineEdit {color: red;}"));
+  }
+
+  emit FilenameChanged(text);
+}
+
+}

app/widget/filefield/filefield.h

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+/***
+
+  Olive - Non-Linear Video Editor
+  Copyright (C) 2020 Olive Team
+
+  This program is free software: you can redistribute it and/or modify
+  it under the terms of the GNU General Public License as published by
+  the Free Software Foundation, either version 3 of the License, or
+  (at your option) any later version.
+
+  This program is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  GNU General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+***/
+
+#ifndef FILEFIELD_H
+#define FILEFIELD_H
+
+#include <QLineEdit>
+#include <QPushButton>
+
+namespace olive {
+
+class FileField : public QWidget
+{
+  Q_OBJECT
+public:
+  FileField(QWidget* parent = nullptr);
+
+  QString GetFilename() const
+  {
+    return line_edit_->text();
+  }
+
+  void SetFilename(const QString& s)
+  {
+    line_edit_->setText(s);
+  }
+
+signals:
+  void FilenameChanged(const QString& filename);
+
+private:
+  QLineEdit* line_edit_;
+
+  QPushButton* browse_btn_;
+
+private slots:
+  void BrowseBtnClicked();
+
+  void LineEditChanged(const QString &text);
+
+};
+
+}
+
+#endif // FILEFIELD_H