feat(console): redraw when children loaded

src/console/main.zig

@@ -1,5 +1,6 @@
 const Model = struct {
     crash: bool = false,
+    redraw: bool = false,
     allocator: std.mem.Allocator,
     current_items_view: *vxfw.ListView,
     parent_items_view: *vxfw.ListView,
@@ -20,7 +21,10 @@ const Model = struct {
     fn typeErasedEventHandler(ptr: *anyopaque, ctx: *vxfw.EventContext, event: vxfw.Event) anyerror!void {
         const vm: *Model = @ptrCast(@alignCast(ptr));
         switch (event) {
-            .init => return ctx.requestFocus(vm.current_items_view.widget()),
+            .init => {
+                try ctx.tick(8, vm.widget());
+                return ctx.requestFocus(vm.current_items_view.widget());
+            },
             .key_press => |key| {
                 if (key.matches('c', .{ .ctrl = true })) {
                     ctx.quit = true;
@@ -33,6 +37,13 @@ const Model = struct {
                 }
             },
             .focus_in => return ctx.requestFocus(vm.current_items_view.widget()),
+            .tick => {
+                if (vm.redraw) {
+                    ctx.redraw = true;
+                }
+                try ctx.tick(8, vm.widget());
+                return;
+            },
             else => {},
         }
     }
@@ -56,6 +67,8 @@ const Model = struct {
 
     fn typeErasedDrawFn(ptr: *anyopaque, ctx: vxfw.DrawContext) std.mem.Allocator.Error!vxfw.Surface {
         const vm: *Model = @ptrCast(@alignCast(ptr));
+        vm.redraw = false;
+
         const rootWidgets = try ctx.arena.create(std.ArrayList(vxfw.SubSurface));
         rootWidgets.* = std.ArrayList(vxfw.SubSurface).init(ctx.arena);
 
@@ -387,18 +400,32 @@ pub fn main() !void {
         .children = .{ .slice = items },
     };
 
+    const model = try allocator.create(Model);
+    defer allocator.destroy(model);
+
+    const childrenLoadedObserver = try allocator.create(Observer(*Tab));
+    childrenLoadedObserver.* = Observer(*Tab){
+        .ctx = @ptrCast(@alignCast(model)),
+        .update = (struct {
+            fn update(ctx: *anyopaque, _: *Tab) void {
+                const ctx_model: *Model = @ptrCast(@alignCast(ctx));
+                ctx_model.redraw = true;
+            }
+        }).update,
+    };
+
+    var app_common_model: AppCommonModel = undefined;
+    {
         var appState: AppState = AppState.init(allocator);
         try appState.addTab(tab1);
         try appState.setCurrentTab(tab1);
 
-    const model = try allocator.create(Model);
-    defer allocator.destroy(model);
+        try appState.tabChildrenLoaded.attach(childrenLoadedObserver);
 
-    var app_common_model: AppCommonModel = undefined;
         try AppCommonModel.init(&app_common_model, allocator, appState);
+    }
     defer app_common_model.deinit();
 
-
     model.* = .{
         .allocator = allocator,
         .app_common_model = &app_common_model,
@@ -413,17 +440,6 @@ pub fn main() !void {
     var app = try vxfw.App.init(allocator);
     defer app.deinit();
 
-    const childrenLoadedObserver = try allocator.create(Observer(*Tab));
-    childrenLoadedObserver.* = Observer(*Tab){
-        .ctx = @ptrCast(@alignCast(&app)),
-        .update = (struct{fn update(ctx: *anyopaque, _: *Tab)void {
-            const app1: *vxfw.App = @ptrCast(@alignCast(ctx));
-            _ = app1;
-        }}).update,
-    };
-
-    try app_common_model.appState.tabChildrenLoaded.attach(childrenLoadedObserver);
-
     try app.run(model.widget(), .{});
 
     model.app_common_model.usage_number.data -= 1;