Enable docking

Author: SpaceManiac

crates/spaceman-dmm/Cargo.toml

@@ -11,7 +11,7 @@ path = "src/main.rs"
 [dependencies]
 dreammaker = { path = "../dreammaker" }
 dmm-tools = { path = "../dmm-tools", features = ["gfx_core"] }
-imgui = "0.12.0"
+imgui = { version = "0.12.0", features = ["docking"] }
 imgui-sdl3 = "0.5.0"
 lodepng = "3.10.7"
 ndarray = "0.15.6"

crates/spaceman-dmm/src/main.rs

@@ -438,6 +438,8 @@ impl EditorScene {
     }
 
     fn run_ui(&mut self, ui: &Ui, renderer: &mut ImRenderer) -> bool {
+        ui.dockspace_over_main_viewport();
+
         for tool in self.tools.iter_mut() {
             tool.icon.prepare(
                 self.environment.as_ref(),

crates/spaceman-dmm/src/support.rs

@@ -1,5 +1,5 @@
 //! Platform support helpers.
-use imgui::{Context, FontConfig};
+use imgui::{ConfigFlags, Context, FontConfig};
 use imgui_sdl3::{platform::Platform, renderer::Renderer};
 use sdl3::{
     event::{Event, WindowEvent},
@@ -39,6 +39,7 @@ pub fn run(title: &str) {
     imgui.style_mut().use_dark_colors();
     imgui.set_ini_filename(None);
     imgui.set_log_filename(None);
+    imgui.io_mut().config_flags |= ConfigFlags::DOCKING_ENABLE;
     imgui
         .fonts()
         .add_font(&[imgui::FontSource::DefaultFontData {