dear_imgui_rs/drag_drop/
ui.rs

1use super::flags::{DragDropPayloadCond, DragDropSourceFlags};
2use super::payload::DragDropPayload;
3use super::source::DragDropSource;
4use super::target::DragDropTarget;
5use crate::{Ui, sys};
6
7impl Ui {
8    /// Creates a new drag drop source configuration
9    ///
10    /// # Arguments
11    /// * `name` - Identifier for this drag source (must match target name)
12    ///
13    /// # Example
14    /// ```no_run
15    /// # use dear_imgui_rs::*;
16    /// # let mut ctx = Context::create();
17    /// # let ui = ctx.frame();
18    /// ui.button("Drag me!");
19    /// if let Some(source) = ui.drag_drop_source_config("MY_DATA")
20    ///     .flags(DragDropSourceFlags::NO_PREVIEW_TOOLTIP)
21    ///     .begin() {
22    ///     ui.text("Custom drag tooltip");
23    ///     source.end();
24    /// }
25    /// ```
26    pub fn drag_drop_source_config<T: AsRef<str>>(&self, name: T) -> DragDropSource<'_, T> {
27        DragDropSource {
28            name,
29            flags: DragDropSourceFlags::NONE,
30            cond: DragDropPayloadCond::Always,
31            ui: self,
32        }
33    }
34
35    /// Creates a drag drop target for the last item
36    ///
37    /// Returns `Some(DragDropTarget)` if the last item can accept drops,
38    /// `None` otherwise.
39    ///
40    /// # Example
41    /// ```no_run
42    /// # use dear_imgui_rs::*;
43    /// # let mut ctx = Context::create();
44    /// # let ui = ctx.frame();
45    /// ui.button("Drop target");
46    /// if let Some(target) = ui.drag_drop_target() {
47    ///     if target.accept_payload_empty("MY_DATA", DragDropTargetFlags::NONE).is_some() {
48    ///         println!("Received drop!");
49    ///     }
50    ///     target.pop();
51    /// }
52    /// ```
53    #[doc(alias = "BeginDragDropTarget")]
54    pub fn drag_drop_target(&self) -> Option<DragDropTarget<'_>> {
55        let should_begin = self.run_with_bound_context(|| unsafe { sys::igBeginDragDropTarget() });
56        if should_begin {
57            Some(DragDropTarget(
58                self,
59                self.begin_native_scope(
60                    crate::scope::NativeScopePop::EndDragDropTarget,
61                    "DragDropTarget",
62                ),
63            ))
64        } else {
65            None
66        }
67    }
68
69    /// Returns the current drag and drop payload, if any.
70    ///
71    /// This is a convenience wrapper over `ImGui::GetDragDropPayload`.
72    ///
73    /// The returned payload is owned and managed by Dear ImGui and may become invalid
74    /// after the drag operation completes. Do not cache it beyond the current frame.
75    #[doc(alias = "GetDragDropPayload")]
76    pub fn drag_drop_payload(&self) -> Option<DragDropPayload> {
77        self.run_with_bound_context(|| unsafe {
78            let ptr = sys::igGetDragDropPayload();
79            if ptr.is_null() {
80                return None;
81            }
82            Some(DragDropPayload::from_raw(*ptr))
83        })
84    }
85}
dear_imgui_rs/drag_drop/ui.rs

dear_imgui_rs/drag_drop/
ui.rs
