add(Scrollable): init function with corresponding usages

examples/demo.zig

@@ -75,7 +75,7 @@ pub fn main() !void {
     }, .{}));
     defer box.deinit();
 
-    var scrollable: App.Scrollable = .{ .container = box };
+    var scrollable: App.Scrollable = .init(box);
 
     var container = try App.Container.init(allocator, .{
         .layout = .{

examples/elements/scrollable.zig

@@ -156,10 +156,10 @@ pub fn main() !void {
     defer container.deinit();
 
     // place empty container containing the element of the scrollable Container.
-    var scrollable_top: App.Scrollable = .{ .container = top_box };
+    var scrollable_top: App.Scrollable = .init(top_box);
     try container.append(try App.Container.init(allocator, .{}, scrollable_top.element()));
 
-    var scrollable_bottom: App.Scrollable = .{ .container = bottom_box };
+    var scrollable_bottom: App.Scrollable = .init(bottom_box);
     try container.append(try App.Container.init(allocator, .{}, scrollable_bottom.element()));
 
     try app.start();

examples/styles/palette.zig

@@ -63,7 +63,7 @@ pub fn main() !void {
         if (comptime field.value == 0) continue; // zterm.Color.default == 0 -> skip
         try box.append(try App.Container.init(allocator, .{ .rectangle = .{ .fill = @enumFromInt(field.value) } }, .{}));
     }
-    var scrollable: App.Scrollable = .{ .container = box };
+    var scrollable: App.Scrollable = .init(box);
     try container.append(try App.Container.init(allocator, .{}, scrollable.element()));
 
     try app.start();

examples/styles/text.zig

@@ -118,7 +118,7 @@ pub fn main() !void {
     }, text_styles.element());
     defer box.deinit();
 
-    var scrollable: App.Scrollable = .{ .container = box };
+    var scrollable: App.Scrollable = .init(box);
     try container.append(try App.Container.init(allocator, .{}, scrollable.element()));
 
     try app.start();

src/color.zig

@@ -20,6 +20,8 @@ pub const Color = enum(u8) {
     white,
     // TODO add further colors as described in https://gist.github.com/ConnerWill/d4b6c776b509add763e17f9f113fd25b # Color / Graphics Mode - 256 Colors
 
+    // TODO might be useful to use the std.ascii stuff!
+
     pub inline fn write(this: Color, writer: anytype, comptime coloring: enum { fg, bg, ul }) !void {
         if (this == .default) {
             switch (coloring) {

src/element.zig

@@ -78,6 +78,10 @@ pub fn Scrollable(Event: type) type {
         /// The actual `Container`, that is scrollable.
         container: Container(Event),
 
+        pub fn init(container: Container(Event)) @This() {
+            return .{ .container = container };
+        }
+
         pub fn element(this: *@This()) Element(Event) {
             return .{
                 .ptr = this,
@@ -222,7 +226,7 @@ test "scrollable vertical" {
     }, .{}));
     defer box.deinit();
 
-    var scrollable: Scrollable(event.SystemEvent) = .{ .container = box };
+    var scrollable: Scrollable(event.SystemEvent) = .init(box);
 
     var container: Container(event.SystemEvent) = try .init(allocator, .{
         .border = .{
@@ -300,7 +304,7 @@ test "scrollable horizontal" {
     }, .{}));
     defer box.deinit();
 
-    var scrollable: Scrollable(event.SystemEvent) = .{ .container = box };
+    var scrollable: Scrollable(event.SystemEvent) = .init(box);
 
     var container: Container(event.SystemEvent) = try .init(allocator, .{
         .border = .{

src/input.zig

@@ -68,6 +68,8 @@ pub const Key = packed struct {
         return std.meta.eql(this, other);
     }
 
+    // TODO might be useful to use the std.ascii stuff!
+
     /// Determine if the `Key` is an ascii character that can be printed to
     /// the screen. This means that the code point of the `Key` is an ascii
     /// character between 32 - 255 (with the exception of 127 = Delete) and no

src/style.zig

@@ -44,6 +44,8 @@ pub fn eql(this: Style, other: Style) bool {
     return std.meta.eql(this, other);
 }
 
+// TODO might be useful to use the std.ascii stuff!
+
 pub fn value(this: Style, writer: anytype, cp: u21) !void {
     var buffer: [4]u8 = undefined;
     const bytes = try std.unicode.utf8Encode(cp, &buffer);