elias/egui_node_graph
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Merge pull request #29 from gmorenz/bezier

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Use bezier curves to draw connections
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setzer22 2022-05-26 08:31:08 +02:00 committed by GitHub
commit 41555c9a1c
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1 changed files with 27 additions and 9 deletions
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36
egui_node_graph/src/editor_ui.rs
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@ -4,7 +4,7 @@ use crate::color_hex_utils::*;
use crate::utils::ColorUtils;
use super::*;
use egui::epaint::RectShape;
use egui::epaint::{CubicBezierShape, RectShape};
use egui::*;
pub type PortLocations = std::collections::HashMap<AnyParameterId, Pos2>;
@ -150,22 +150,20 @@ where
}
/* Draw connections */
let connection_stroke = egui::Stroke {
width: 5.0,
color: color_from_hex("#efefef").unwrap(),
};
if let Some((_, ref locator)) = self.connection_in_progress {
let start_pos = port_locations[locator];
ui.painter()
.line_segment([start_pos, cursor_pos], connection_stroke)
let (src_pos, dst_pos) = match locator {
AnyParameterId::Output(_) => (start_pos, cursor_pos),
AnyParameterId::Input(_) => (cursor_pos, start_pos),
};
draw_connection(ui.painter(), src_pos, dst_pos);
}
for (input, output) in self.graph.iter_connections() {
let src_pos = port_locations[&AnyParameterId::Output(output)];
let dst_pos = port_locations[&AnyParameterId::Input(input)];
ui.painter()
.line_segment([src_pos, dst_pos], connection_stroke);
draw_connection(ui.painter(), src_pos, dst_pos);
}
/* Handle responses from drawing nodes */
@ -267,6 +265,26 @@ where
}
}
fn draw_connection(painter: &Painter, src_pos: Pos2, dst_pos: Pos2) {
let connection_stroke = egui::Stroke {
width: 5.0,
color: color_from_hex("#efefef").unwrap(),
};
let control_scale = ((dst_pos.x - src_pos.x) / 2.0).max(30.0);
let src_control = src_pos + Vec2::X * control_scale;
let dst_control = dst_pos - Vec2::X * control_scale;
let bezier = CubicBezierShape::from_points_stroke(
[src_pos, src_control, dst_control, dst_pos],
false,
Color32::TRANSPARENT,
connection_stroke,
);
painter.add(bezier);
}
impl<'a, NodeData, DataType, ValueType, UserResponse, UserState>
GraphNodeWidget<'a, NodeData, DataType, ValueType>
where