itsmattkc
378c354277
Rather than the cumbersome and small "node connectors" (introduced a while ago when nodes had more than one output), this is a more streamlined system of connecting nodes (hold Ctrl and drag to connect)
117 lines
2.7 KiB
C++
117 lines
2.7 KiB
C++
/***
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Olive - Non-Linear Video Editor
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Copyright (C) 2019 Olive Team
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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***/
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#include "nodeviewedge.h"
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#include <QApplication>
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#include <QDebug>
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#include <QGraphicsSceneMouseEvent>
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#include "common/clamp.h"
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#include "common/lerp.h"
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#include "nodeview.h"
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#include "nodeviewscene.h"
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NodeViewEdge::NodeViewEdge(QGraphicsItem *parent) :
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QGraphicsPathItem(parent),
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edge_(nullptr),
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color_group_(QPalette::Active),
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color_role_(QPalette::Text)
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{
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// Ensures this UI object is drawn behind other objects
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setZValue(-1);
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// Use font metrics to set edge width for basic high DPI support
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edge_width_ = QFontMetrics(QFont()).height() / 12;
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}
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void NodeViewEdge::SetEdge(NodeEdgePtr edge)
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{
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SetConnected(true);
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// Set the new edge pointer
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edge_ = edge;
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// Re-adjust the line positioning for this new edge
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Adjust();
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}
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NodeEdgePtr NodeViewEdge::edge()
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{
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return edge_;
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}
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void NodeViewEdge::Adjust()
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{
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if (!edge_ || !scene()) {
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return;
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}
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// Get the UI objects of both nodes that this edge connects
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NodeViewItem* output = static_cast<NodeViewScene*>(scene())->NodeToUIObject(edge_->output()->parentNode());
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NodeViewItem* input = static_cast<NodeViewScene*>(scene())->NodeToUIObject(edge_->input()->parentNode());
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if (!output || !input) {
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return;
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}
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// Draw a line between the two
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SetPoints(output->GetParamPoint(edge_->output()), input->GetParamPoint(edge_->input()));
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}
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void NodeViewEdge::SetConnected(bool c)
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{
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if (c) {
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color_group_ = QPalette::Active;
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} else {
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color_group_ = QPalette::Disabled;
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}
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UpdatePen();
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}
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void NodeViewEdge::SetHighlighted(bool e)
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{
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if (e) {
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color_role_ = QPalette::Highlight;
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} else {
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color_role_ = QPalette::Text;
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}
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UpdatePen();
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}
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void NodeViewEdge::SetPoints(const QPointF &start, const QPointF &end)
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{
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QPainterPath path;
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double half_x = lerp(start.x(), end.x(), 0.5);
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path.moveTo(start);
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path.cubicTo(QPointF(half_x, start.y()), QPointF(half_x, end.y()), end);
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setPath(path);
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}
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void NodeViewEdge::UpdatePen()
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{
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setPen(QPen(qApp->palette().color(color_group_, color_role_), edge_width_));
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//update();
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}
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