jellyflow_runtime/runtime/drag/
pointer_gesture.rs

1use jellyflow_core::core::CanvasPoint;
2use serde::{Deserialize, Serialize};
3
4use crate::runtime::selection::{
5    SelectionPointerClaim, SelectionPointerClaimInput, resolve_selection_pointer_claim,
6};
7
8use super::activation::{NodeDragActivationInput, node_drag_threshold_met};
9
10/// Input for resolving which headless pointer gesture should claim a drag start.
11#[derive(Debug, Clone, Copy, PartialEq)]
12pub struct PointerGestureClaimInput {
13    pub screen_delta: CanvasPoint,
14    pub selection_key_pressed: bool,
15    pub user_selection_active: bool,
16    pub connection_in_progress: bool,
17    pub pane_click_distance: f32,
18    pub node_drag_threshold: f32,
19}
20
21impl PointerGestureClaimInput {
22    pub fn new(
23        screen_delta: CanvasPoint,
24        selection_key_pressed: bool,
25        user_selection_active: bool,
26        connection_in_progress: bool,
27        pane_click_distance: f32,
28        node_drag_threshold: f32,
29    ) -> Self {
30        Self {
31            screen_delta,
32            selection_key_pressed,
33            user_selection_active,
34            connection_in_progress,
35            pane_click_distance,
36            node_drag_threshold,
37        }
38    }
39}
40
41/// Which runtime gesture should own the current pointer drag.
42#[derive(Debug, Clone, Copy, PartialEq, Eq, Serialize, Deserialize)]
43#[serde(rename_all = "snake_case")]
44pub enum PointerGestureClaim {
45    None,
46    Selection,
47    Connection,
48    NodeDrag,
49}
50
51pub fn resolve_pointer_gesture_claim(input: PointerGestureClaimInput) -> PointerGestureClaim {
52    if input.connection_in_progress {
53        return PointerGestureClaim::Connection;
54    }
55
56    match resolve_selection_pointer_claim(SelectionPointerClaimInput::new(
57        input.screen_delta,
58        input.pane_click_distance,
59        input.selection_key_pressed,
60        input.user_selection_active,
61    )) {
62        SelectionPointerClaim::SelectionOwnsDrag | SelectionPointerClaim::SelectionMayClaimDrag => {
63            PointerGestureClaim::Selection
64        }
65        SelectionPointerClaim::Unclaimed => {
66            if node_drag_threshold_met(NodeDragActivationInput::new(
67                input.screen_delta,
68                input.node_drag_threshold,
69            )) {
70                PointerGestureClaim::NodeDrag
71            } else {
72                PointerGestureClaim::None
73            }
74        }
75    }
76}
jellyflow_runtime/runtime/drag/pointer_gesture.rs

jellyflow_runtime/runtime/drag/
pointer_gesture.rs
