improved connector UI in node view

2021-11-10 21:59:54 -08:00
parent 9c650883c2
commit 6033039046
15 changed files with 352 additions and 148 deletions
@@ -0,0 +1,81 @@
+/***
+
+  Olive - Non-Linear Video Editor
+  Copyright (C) 2021 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 "nodeviewitemconnector.h"
+
+#include <QApplication>
+#include <QFontMetrics>
+#include <QPalette>
+#include <QPen>
+
+#include "nodeviewitem.h"
+
+namespace olive {
+
+NodeViewItemConnector::NodeViewItemConnector(QGraphicsItem *parent) :
+  QGraphicsPolygonItem(parent)
+{
+  QColor c = qApp->palette().text().color();
+  setPen(QPen(c, NodeViewItem::DefaultItemBorder()));
+  setBrush(c);
+}
+
+void NodeViewItemConnector::SetFlowDirection(NodeViewCommon::FlowDirection dir)
+{
+  QFont f;
+  QFontMetricsF fm(f);
+
+  int triangle_sz = fm.height()/2;
+  int triangle_sz_half = triangle_sz / 2;
+
+  QPolygonF p;
+  p.resize(3);
+
+  switch (dir) {
+  case NodeViewCommon::kLeftToRight:
+    // Triangle pointing right
+    p[0] = QPointF(0, -triangle_sz_half);
+    p[1] = QPointF(triangle_sz_half, 0);
+    p[2] = QPointF(0, triangle_sz_half);
+    break;
+  case NodeViewCommon::kTopToBottom:
+    // Triangle pointing down
+    p[0] = QPointF(-triangle_sz_half, 0);
+    p[1] = QPointF(0, triangle_sz_half);
+    p[2] = QPointF(triangle_sz_half, 0);
+    break;
+  case NodeViewCommon::kBottomToTop:
+    // Triangle pointing up
+    p[0] = QPointF(-triangle_sz_half, 0);
+    p[1] = QPointF(0, -triangle_sz_half);
+    p[2] = QPointF(triangle_sz_half, 0);
+    break;
+  case NodeViewCommon::kRightToLeft:
+    // Triangle pointing left
+    p[0] = QPointF(0, -triangle_sz_half);
+    p[1] = QPointF(-triangle_sz_half, 0);
+    p[2] = QPointF(0, triangle_sz_half);
+    break;
+  }
+
+  setPolygon(p);
+}
+
+}