73 lines
2.2 KiB
C++
73 lines
2.2 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 <QDebug>
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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 "nodeviewitem.h"
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NodeViewEdge::NodeViewEdge(QGraphicsItem *parent) :
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QGraphicsLineItem(parent),
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edge_(nullptr)
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{
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// FIXME: This should probably be set to the text color in order to work on light themes
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setPen(QPen(Qt::white, 2));
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// Ensures this UI object is drawn behind other objects
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setZValue(-1);
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}
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void NodeViewEdge::SetEdge(NodeEdgePtr edge)
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{
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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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void NodeViewEdge::Adjust()
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{
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if (edge_ == nullptr || scene() == nullptr) {
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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 = NodeView::NodeToUIObject(scene(), edge_->output()->parent());
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NodeViewItem* input = NodeView::NodeToUIObject(scene(), edge_->input()->parent());
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// Calculate output/input points
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qreal value = clamp(0.5 + (output->pos().y() - input->pos().y()) / (input->rect().height()) / 4, 0.0, 1.0);
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// Use a lerp function to draw the line between the two corners
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qreal output_point = output->pos().y() + lerp(0.0, output->rect().height(), 1.0 - value);
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qreal input_point = input->pos().y() + lerp(0.0, input->rect().height(), value);
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// Draw a line between the two
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setLine(QLineF(
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QPointF(output->pos().x() + output->rect().width(), output_point),
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QPointF(input->pos().x(), input_point)
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));
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}
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