Start work on dragging tabs

crates/gpui2/src/elements/div.rs

@@ -29,7 +29,7 @@ pub struct GroupStyle {
     pub style: Box<StyleRefinement>,
 }
 
-pub trait InteractiveElement: Sized + Element {
+pub trait InteractiveElement: Sized {
     fn interactivity(&mut self) -> &mut Interactivity;
 
     fn group(mut self, group: impl Into<SharedString>) -> Self {
@@ -436,7 +436,6 @@ pub trait StatefulInteractiveElement: InteractiveElement {
             "calling tooltip more than once on the same element is not supported"
         );
         self.interactivity().tooltip_builder = Some(Rc::new(build_tooltip));
-
         self
     }
 }

crates/ui2/src/components/tab.rs

@@ -1,10 +1,7 @@
-use std::cmp::Ordering;
-use std::rc::Rc;
-
-use gpui::{AnyElement, AnyView, ClickEvent, IntoElement, MouseButton};
-use smallvec::SmallVec;
-
 use crate::prelude::*;
+use gpui::{AnyElement, IntoElement, Stateful};
+use smallvec::SmallVec;
+use std::cmp::Ordering;
 
 /// The position of a [`Tab`] within a list of tabs.
 #[derive(Debug, PartialEq, Eq, Clone, Copy)]
@@ -29,12 +26,10 @@ pub enum TabCloseSide {
 
 #[derive(IntoElement)]
 pub struct Tab {
-    id: ElementId,
+    div: Stateful<Div>,
     selected: bool,
     position: TabPosition,
     close_side: TabCloseSide,
-    on_click: Option<Rc<dyn Fn(&ClickEvent, &mut WindowContext) + 'static>>,
-    tooltip: Option<Box<dyn Fn(&mut WindowContext) -> AnyView + 'static>>,
     start_slot: Option<AnyElement>,
     end_slot: Option<AnyElement>,
     children: SmallVec<[AnyElement; 2]>,
@@ -43,12 +38,10 @@ pub struct Tab {
 impl Tab {
     pub fn new(id: impl Into<ElementId>) -> Self {
         Self {
-            id: id.into(),
+            div: div().id(id),
             selected: false,
             position: TabPosition::First,
             close_side: TabCloseSide::End,
-            on_click: None,
-            tooltip: None,
             start_slot: None,
             end_slot: None,
             children: SmallVec::new(),
@@ -65,16 +58,6 @@ impl Tab {
         self
     }
 
-    pub fn on_click(mut self, handler: impl Fn(&ClickEvent, &mut WindowContext) + 'static) -> Self {
-        self.on_click = Some(Rc::new(handler));
-        self
-    }
-
-    pub fn tooltip(mut self, tooltip: impl Fn(&mut WindowContext) -> AnyView + 'static) -> Self {
-        self.tooltip = Some(Box::new(tooltip));
-        self
-    }
-
     pub fn start_slot<E: IntoElement>(mut self, element: impl Into<Option<E>>) -> Self {
         self.start_slot = element.into().map(IntoElement::into_any_element);
         self
@@ -86,6 +69,14 @@ impl Tab {
     }
 }
 
+impl InteractiveElement for Tab {
+    fn interactivity(&mut self) -> &mut gpui::Interactivity {
+        self.div.interactivity()
+    }
+}
+
+impl StatefulInteractiveElement for Tab {}
+
 impl Selectable for Tab {
     fn selected(mut self, selected: bool) -> Self {
         self.selected = selected;
@@ -100,7 +91,7 @@ impl ParentElement for Tab {
 }
 
 impl RenderOnce for Tab {
-    type Rendered = Div;
+    type Rendered = Stateful<Div>;
 
     fn render(self, cx: &mut WindowContext) -> Self::Rendered {
         const HEIGHT_IN_REMS: f32 = 30. / 16.;
@@ -120,7 +111,7 @@ impl RenderOnce for Tab {
             ),
         };
 
-        div()
+        self.div
             .h(rems(HEIGHT_IN_REMS))
             .bg(tab_bg)
             .border_color(cx.theme().colors().border)
@@ -146,7 +137,6 @@ impl RenderOnce for Tab {
             .child(
                 h_stack()
                     .group("")
-                    .id(self.id)
                     .relative()
                     .h_full()
                     .px_5()
@@ -154,18 +144,6 @@ impl RenderOnce for Tab {
                     .text_color(text_color)
                     // .hover(|style| style.bg(tab_hover_bg))
                     // .active(|style| style.bg(tab_active_bg))
-                    .when_some(self.on_click, |tab, on_click| {
-                        tab.cursor_pointer().on_click(move |event, cx| {
-                            // HACK: GPUI currently fires `on_click` with any mouse button,
-                            // but we only care about the left button.
-                            if event.down.button == MouseButton::Left {
-                                (on_click)(event, cx)
-                            }
-                        })
-                    })
-                    .when_some(self.tooltip, |tab, tooltip| {
-                        tab.tooltip(move |cx| tooltip(cx))
-                    })
                     .child(
                         h_stack()
                             .w_3()

crates/workspace2/src/pane.rs

@@ -7,10 +7,10 @@ use crate::{
 use anyhow::Result;
 use collections::{HashMap, HashSet, VecDeque};
 use gpui::{
-    actions, impl_actions, overlay, prelude::*, Action, AnchorCorner, AnyWeakView, AppContext,
-    AsyncWindowContext, DismissEvent, Div, EntityId, EventEmitter, FocusHandle, Focusable,
-    FocusableView, Model, MouseButton, NavigationDirection, Pixels, Point, PromptLevel, Render,
-    Subscription, Task, View, ViewContext, VisualContext, WeakView, WindowContext,
+    actions, impl_actions, overlay, prelude::*, Action, AnchorCorner, AnyDrag, AnyWeakView,
+    AppContext, AsyncWindowContext, DismissEvent, Div, EntityId, EventEmitter, FocusHandle,
+    Focusable, FocusableView, Model, MouseButton, NavigationDirection, Pixels, Point, PromptLevel,
+    Render, Subscription, Task, View, ViewContext, VisualContext, WeakView, WindowContext,
 };
 use parking_lot::Mutex;
 use project::{Project, ProjectEntryId, ProjectPath};
@@ -25,6 +25,7 @@ use std::{
         Arc,
     },
 };
+use theme::ThemeSettings;
 
 use ui::{
     h_stack, prelude::*, right_click_menu, ButtonSize, Color, Icon, IconButton, IconSize,
@@ -231,6 +232,13 @@ pub struct NavigationEntry {
     pub timestamp: usize,
 }
 
+struct DraggedTab {
+    pub pane: View<Pane>,
+    pub ix: usize,
+    pub detail: usize,
+    pub is_active: bool,
+}
+
 // pub struct DraggedItem {
 //     pub handle: Box<dyn ItemHandle>,
 //     pub pane: WeakView<Pane>,
@@ -1501,7 +1509,17 @@ impl Pane {
                 .on_click(cx.listener(move |pane: &mut Self, event, cx| {
                     pane.activate_item(ix, true, true, cx)
                 }))
-                // .on_drag(move |pane, cx| pane.render_tab(ix, item.boxed_clone(), detail, cx))
+                .on_drag({
+                    let pane = cx.view().clone();
+                    move |cx| {
+                        cx.build_view(|cx| DraggedTab {
+                            pane: pane.clone(),
+                            detail,
+                            is_active,
+                            ix,
+                        })
+                    }
+                })
                 // .drag_over::<DraggedTab>(|d| d.bg(cx.theme().colors().element_drop_target))
                 // .on_drop(|_view, state: View<DraggedTab>, cx| {
                 //     eprintln!("{:?}", state.read(cx));
@@ -3131,15 +3149,17 @@ fn dirty_message_for(buffer_path: Option<ProjectPath>) -> String {
 //     }
 // }
 
-#[derive(Clone, Debug)]
-struct DraggedTab {
-    title: String,
-}
-
 impl Render for DraggedTab {
-    type Element = Div;
+    type Element = <Tab as RenderOnce>::Rendered;
 
     fn render(&mut self, cx: &mut ViewContext<Self>) -> Self::Element {
-        div().w_8().h_4().bg(gpui::red())
+        let ui_font = ThemeSettings::get_global(cx).ui_font.family.clone();
+        let item = &self.pane.read(cx).items[self.ix];
+        let label = item.tab_content(Some(self.detail), false, cx);
+        Tab::new("")
+            .selected(self.is_active)
+            .child(label)
+            .render(cx)
+            .font(ui_font)
     }
 }