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nodeview: implemented dragger to create edge without holding key

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This commit is contained in:
itsmattkc
2021-07-10 10:19:36 -07:00
parent 8f055e6331
commit 4d69e55799
4 changed files with 72 additions and 10 deletions
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app/widget/nodeview/nodeviewitem.cpp
+37
View File
@@ -65,6 +65,8 @@ NodeViewItem::NodeViewItem(QGraphicsItem *parent) :
title_bar_rect_ = QRectF(-widget_width/2, -widget_height/2, widget_width, widget_height);
setRect(title_bar_rect_);
output_triangle_.resize(3);
}
QPointF NodeViewItem::GetNodePosition() const
@@ -341,6 +343,41 @@ void NodeViewItem::paint(QPainter *painter, const QStyleOptionGraphicsItem *opti
painter->setBrush(Qt::NoBrush);
painter->drawRect(rect());
// Draw output triangle
painter->setPen(Qt::NoPen);
painter->setBrush(app_pal.color(QPalette::Text));
int triangle_sz = qMin(rect().width(), rect().height()) / 2;
int triangle_sz_half = triangle_sz / 2;
switch (flow_dir_) {
case NodeViewCommon::kLeftToRight:
// Triangle pointing right
output_triangle_[0] = QPointF(rect().right(), rect().center().y() - triangle_sz_half);
output_triangle_[1] = QPointF(rect().right() + triangle_sz_half, rect().center().y());
output_triangle_[2] = QPointF(rect().right(), rect().center().y() + triangle_sz_half);
break;
case NodeViewCommon::kTopToBottom:
// Triangle pointing down
output_triangle_[0] = QPointF(rect().center().x() - triangle_sz_half, rect().bottom());
output_triangle_[1] = QPointF(rect().center().x(), rect().bottom() + triangle_sz_half);
output_triangle_[2] = QPointF(rect().center().x() + triangle_sz_half, rect().bottom());
break;
case NodeViewCommon::kBottomToTop:
// Triangle pointing up
output_triangle_[0] = QPointF(rect().center().x() - triangle_sz_half, rect().top());
output_triangle_[1] = QPointF(rect().center().x(), rect().top() - triangle_sz_half);
output_triangle_[2] = QPointF(rect().center().x() + triangle_sz_half, rect().top());
break;
case NodeViewCommon::kRightToLeft:
// Triangle pointing left
output_triangle_[0] = QPointF(rect().left(), rect().center().y() - triangle_sz_half);
output_triangle_[1] = QPointF(rect().left() - triangle_sz_half, rect().center().y());
output_triangle_[2] = QPointF(rect().left(), rect().center().y() + triangle_sz_half);
break;
}
painter->drawPolygon(output_triangle_);
}
void NodeViewItem::mousePressEvent(QGraphicsSceneMouseEvent *event)