itsmattkc
ce889f68d5
between the two nodes UI convenience. Edge highlights when the cursor is in range to perform this action.
132 lines
3.7 KiB
C++
132 lines
3.7 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 <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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NodeViewEdge::NodeViewEdge(QGraphicsItem *parent) :
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QGraphicsLineItem(parent),
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edge_(nullptr),
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connected_(false),
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highlighted_(false)
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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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qreal CalculateEdgeYPoint(NodeViewItem *item, int param_index, NodeViewItem *opposing)
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{
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if (item->IsExpanded()) {
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return item->pos().y() + item->GetParameterConnectorRect(param_index).center().y();
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} else {
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qreal max_height = qMax(opposing->rect().height(), item->rect().height());
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// Calculate the Y distance between the two nodes and create a 0.0-1.0 range for lerping
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qreal input_value = clamp(0.5 + ((opposing->pos().y() + opposing->rect().top()) - (item->pos().y() + item->rect().top())) / max_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 input_y = item->pos().y() + item->rect().top() + lerp(0.0, item->rect().height(), input_value);
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// Set Y values according to calculations
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return input_y;
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}
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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()->parentNode());
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NodeViewItem* input = NodeView::NodeToUIObject(scene(), edge_->input()->parentNode());
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// Create initial values
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QPointF output_point = QPointF(output->pos().x() + output->rect().left() + output->rect().width(), 0);
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QPointF input_point = QPointF(input->pos().x() + output->rect().left(), 0);
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// Calculate output/input points
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output_point.setY(CalculateEdgeYPoint(output, edge_->output()->index(), input));
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input_point.setY(CalculateEdgeYPoint(input, edge_->input()->index(), output));
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// Draw a line between the two
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setLine(QLineF(
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output_point,
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input_point
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));
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}
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void NodeViewEdge::SetConnected(bool c)
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{
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connected_ = c;
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update();
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}
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void NodeViewEdge::SetHighlighted(bool e)
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{
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highlighted_ = e;
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update();
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}
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void NodeViewEdge::paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget)
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{
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QPalette::ColorGroup color_group = QPalette::Active;
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QPalette::ColorRole color_role = QPalette::Text;
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if (highlighted_) {
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color_role = QPalette::Highlight;
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}
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if (!connected_) {
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color_group = QPalette::Disabled;
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}
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setPen(QPen(widget->palette().color(color_group, color_role), edge_width_));
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QGraphicsLineItem::paint(painter, option, widget);
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}
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