The GUI library
for Zig

const std = @import("std");
const knots = @import("knots");
const ui = @import("ui");

pub fn main(init: std.process.Init) !void {
    var app = try knots.App.init(init.io, init.gpa, .{
        .window = .{ .width = 1280, .height = 720, .title = "Knots" },
    });
    defer app.deinit();
    try app.start(frame);
}

fn frame(_: *knots.View, frame_context: *ui.Frame) !void {
    const size = frame_context.input().logical_extent;
    try frame_context.e(ui.component.Rect{
        .width = .fixed(@floatFromInt(size.width)),
        .height = .fixed(@floatFromInt(size.height)),
        .padding = .init(16, 16, 16, 16),
        .key = .src(@src()),
    });
}

const knots = b.dependency("knots", .{ .target = target, .optimize = optimize });

exe.root_module.addImport("knots", knots.module("knots"));
exe.root_module.addImport("ui", knots.module("ui"));

var context = try ui.Context.init(allocator, .{});
defer context.deinit();

var frame = try context.beginFrame(host_input);
defer frame.deinit();
try buildUi(&frame);

const output = try context.endFrame(&frame);
window.setCursorShape(output.cursor_shape);

const prepared = try painter.prepare(&output.packet, &.{
    .width = target_width,
    .height = target_height,
    .content_scale = host_input.content_scale,
    .upload_slot = submission.upload_slot,
    .frame_context = submission,
    .linear_target = false,
});
try painter.encode(&prepared, host_pass);

const Knots = @import("knots");

const knots = b.dependency("knots", .{
    .target = target,
    .optimize = optimize,
    .web_threads = true,
});

const exe_mod = b.createModule(.{
    .root_source_file = b.path("src/main.zig"),
    .target = target,
    .optimize = optimize,
    .imports = &.{
        .{ .name = "knots", .module = knots.module("knots") },
        .{ .name = "ui", .module = knots.module("ui") },
    },
});
const exe = b.addExecutable(.{ .name = "app", .root_module = exe_mod });
exe.entry = .disabled;
Knots.installWeb(b, knots, exe_mod, exe, .{});

// zig build -Dtarget=wasm32-freestanding