add deletion of views

src/app.zig

@@ -1085,6 +1085,46 @@ pub const Project = struct {
         });
     }
 
+    pub fn removeFile(self: *Project, allocator: std.mem.Allocator, file_id: Id) void {
+        const file = self.files.get(file_id) orelse return;
+
+        self.removeSampleList(file.samples_id);
+        file.deinit(allocator);
+
+        self.files.remove(file_id);
+        file.* = undefined;
+    }
+
+    pub fn removeChannel(self: *Project, allocator: std.mem.Allocator, channel_id: Id) void {
+        const channel = self.channels.get(channel_id) orelse return;
+
+        self.removeSampleList(channel.collected_samples_id);
+
+        channel.deinit(allocator);
+        self.channels.remove(channel_id);
+        channel.* = undefined;
+    }
+
+    pub fn removeView(self: *Project, allocator: std.mem.Allocator, view_id: Id) void {
+        const view = self.views.get(view_id) orelse return;
+
+        if (view.transformed_samples) |sample_list_id| {
+            self.removeSampleList(sample_list_id);
+        }
+
+        switch (view.reference) {
+            .file => |file_id| {
+                self.removeFile(allocator, file_id);
+            },
+            .channel => |channel_id| {
+                self.removeChannel(allocator, channel_id);
+            }
+        }
+
+        self.views.remove(view_id);
+        view.* = undefined;
+    }
+
     pub fn deinit(self: *Project, allocator: Allocator) void {
         var file_iter = self.files.iterator();
         while (file_iter.next()) |file| {

src/screens/main_screen.zig

@@ -723,6 +723,16 @@ fn showViewSettings(self: *MainScreen, view_id: Id) !void {
             view.transforms.appendAssumeCapacity(.{ .addition = 0 });
         }
     }
+
+    _ = ui.createBox(.{ .size_y = UI.Sizing.initGrowFull() });
+
+    {
+        const btn = ui.textButton("Delete");
+        btn.borders = UI.Borders.all(.{ .color = srcery.red, .size = 4 });
+        if (ui.signal(btn).clicked()) {
+            project.removeView(self.app.allocator, view_id);
+        }
+    }
 }
 
 fn showMarkedRange(self: *MainScreen, view_id: Id, index: usize) void {