began node viewer for dag insight

2019-07-15 03:52:44 -04:00
parent 33f9f9dbc4
commit dc2101938e
19 changed files with 401 additions and 42 deletions
@@ -0,0 +1,72 @@
+/***
+
+  Olive - Non-Linear Video Editor
+  Copyright (C) 2019 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 "nodeviewedge.h"
+
+#include <QDebug>
+
+#include "clamp.h"
+#include "lerp.h"
+#include "nodeview.h"
+#include "nodeviewitem.h"
+
+NodeViewEdge::NodeViewEdge(QGraphicsItem *parent) :
+  QGraphicsLineItem(parent),
+  edge_(nullptr)
+{
+  // FIXME: This should probably be set to the text color in order to work on light themes
+  setPen(QPen(Qt::white, 2));
+
+  // Ensures this UI object is drawn behind other objects
+  setZValue(-1);
+}
+
+void NodeViewEdge::SetEdge(NodeEdgePtr edge)
+{
+  // Set the new edge pointer
+  edge_ = edge;
+
+  // Re-adjust the line positioning for this new edge
+  Adjust();
+}
+
+void NodeViewEdge::Adjust()
+{
+  if (edge_ == nullptr || scene() == nullptr) {
+    return;
+  }
+
+  // Get the UI objects of both nodes that this edge connects
+  NodeViewItem* output = NodeView::NodeToUIObject(scene(), edge_->output()->parent());
+  NodeViewItem* input = NodeView::NodeToUIObject(scene(), edge_->input()->parent());
+
+  // Calculate output/input points
+  qreal value = clamp(0.5 + (output->pos().y() - input->pos().y()) / (input->rect().height()) / 4, 0.0, 1.0);
+
+  // Use a lerp function to draw the line between the two corners
+  qreal output_point = output->pos().y() + lerp(0.0, output->rect().height(), 1.0 - value);
+  qreal input_point = input->pos().y() + lerp(0.0, input->rect().height(), value);
+
+  // Draw a line between the two
+  setLine(QLineF(
+            QPointF(output->pos().x() + output->rect().width(), output_point),
+            QPointF(input->pos().x(), input_point)
+            ));
+}