Пустое окно

.gitignore

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+# ---> Zig
+.zig-cache/
+zig-out/
+

.vscode/launch.json

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+{
+    "version": "0.2.0",
+    "configurations": [
+        {
+            "name": "Zig: Debug (lldb)",
+            "type": "lldb",
+            "request": "launch",
+            "program": "${workspaceFolder}/zig-out/bin/Zivro",
+            "args": [],
+            "cwd": "${workspaceFolder}",
+            "preLaunchTask": "zig: build"
+        },
+    ]
+}

.vscode/tasks.json

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+{
+    "version": "2.0.0",
+    "tasks": [
+        {
+            "label": "zig: build",
+            "type": "shell",
+            "command": "zig build",
+            "group": {
+                "kind": "build",
+                "isDefault": true
+            },
+            "problemMatcher": ["$gcc"],
+            "presentation": {
+                "reveal": "always",
+                "panel": "shared",
+                "showReuseMessage": true
+            }
+        }
+    ]
+}

.zigversion

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+0.15.2

build.zig

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+const std = @import("std");
+
+pub fn build(b: *std.Build) void {
+    const target = b.standardTargetOptions(.{});
+    const optimize = b.standardOptimizeOption(.{});
+
+    const dvui_dep = b.dependency("dvui", .{ .target = target, .optimize = optimize, .backend = .sdl3 });
+
+    const exe = b.addExecutable(.{
+        .name = "Zivro",
+        .root_module = b.createModule(.{
+            .root_source_file = b.path("src/main.zig"),
+            .target = target,
+            .optimize = optimize,
+
+            .imports = &.{
+                .{ .name = "dvui", .module = dvui_dep.module("dvui_sdl3") },
+                .{ .name = "sdl-backend", .module = dvui_dep.module("sdl3") },
+            },
+        }),
+    });
+
+    b.installArtifact(exe);
+
+    const run_step = b.step("run", "Run the app");
+
+    const run_cmd = b.addRunArtifact(exe);
+    run_step.dependOn(&run_cmd.step);
+
+    run_cmd.step.dependOn(b.getInstallStep());
+
+    if (b.args) |args| {
+        run_cmd.addArgs(args);
+    }
+
+    const exe_tests = b.addTest(.{
+        .root_module = exe.root_module,
+    });
+
+    const run_exe_tests = b.addRunArtifact(exe_tests);
+
+    const test_step = b.step("test", "Run tests");
+    test_step.dependOn(&run_exe_tests.step);
+}

build.zig.zon

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+.{
+    // This is the default name used by packages depending on this one. For
+    // example, when a user runs `zig fetch --save <url>`, this field is used
+    // as the key in the `dependencies` table. Although the user can choose a
+    // different name, most users will stick with this provided value.
+    //
+    // It is redundant to include "zig" in this name because it is already
+    // within the Zig package namespace.
+    .name = .Zivro,
+    // This is a [Semantic Version](https://semver.org/).
+    // In a future version of Zig it will be used for package deduplication.
+    .version = "0.0.0",
+    // Together with name, this represents a globally unique package
+    // identifier. This field is generated by the Zig toolchain when the
+    // package is first created, and then *never changes*. This allows
+    // unambiguous detection of one package being an updated version of
+    // another.
+    //
+    // When forking a Zig project, this id should be regenerated (delete the
+    // field and run `zig build`) if the upstream project is still maintained.
+    // Otherwise, the fork is *hostile*, attempting to take control over the
+    // original project's identity. Thus it is recommended to leave the comment
+    // on the following line intact, so that it shows up in code reviews that
+    // modify the field.
+    .fingerprint = 0x62d7eba14686811e, // Changing this has security and trust implications.
+    // Tracks the earliest Zig version that the package considers to be a
+    // supported use case.
+    .minimum_zig_version = "0.15.2",
+    // This field is optional.
+    // Each dependency must either provide a `url` and `hash`, or a `path`.
+    // `zig build --fetch` can be used to fetch all dependencies of a package, recursively.
+    // Once all dependencies are fetched, `zig build` no longer requires
+    // internet connectivity.
+    .dependencies = .{
+        .dvui = .{
+            .url = "https://github.com/david-vanderson/dvui/archive/main.tar.gz",
+            .hash = "dvui-0.4.0-dev-AQFJmev72QC6e0ojhnW8a_wRhZDgzWWLgeyoNuIPZc2m",
+        },
+
+        // See `zig fetch --save <url>` for a command-line interface for adding dependencies.
+        //.example = .{
+        //    // When updating this field to a new URL, be sure to delete the corresponding
+        //    // `hash`, otherwise you are communicating that you expect to find the old hash at
+        //    // the new URL. If the contents of a URL change this will result in a hash mismatch
+        //    // which will prevent zig from using it.
+        //    .url = "https://example.com/foo.tar.gz",
+        //
+        //    // This is computed from the file contents of the directory of files that is
+        //    // obtained after fetching `url` and applying the inclusion rules given by
+        //    // `paths`.
+        //    //
+        //    // This field is the source of truth; packages do not come from a `url`; they
+        //    // come from a `hash`. `url` is just one of many possible mirrors for how to
+        //    // obtain a package matching this `hash`.
+        //    //
+        //    // Uses the [multihash](https://multiformats.io/multihash/) format.
+        //    .hash = "...",
+        //
+        //    // When this is provided, the package is found in a directory relative to the
+        //    // build root. In this case the package's hash is irrelevant and therefore not
+        //    // computed. This field and `url` are mutually exclusive.
+        //    .path = "foo",
+        //
+        //    // When this is set to `true`, a package is declared to be lazily
+        //    // fetched. This makes the dependency only get fetched if it is
+        //    // actually used.
+        //    .lazy = false,
+        //},
+    },
+    // Specifies the set of files and directories that are included in this package.
+    // Only files and directories listed here are included in the `hash` that
+    // is computed for this package. Only files listed here will remain on disk
+    // when using the zig package manager. As a rule of thumb, one should list
+    // files required for compilation plus any license(s).
+    // Paths are relative to the build root. Use the empty string (`""`) to refer to
+    // the build root itself.
+    // A directory listed here means that all files within, recursively, are included.
+    .paths = .{
+        "build.zig",
+        "build.zig.zon",
+        "src",
+        // For example...
+        //"LICENSE",
+        //"README.md",
+    },
+}

src/main.zig

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+const std = @import("std");
+const builtin = @import("builtin");
+const dvui = @import("dvui");
+const SDLBackend = @import("sdl-backend");
+
+pub fn main() !void {
+    var gpa = std.heap.GeneralPurposeAllocator(.{}){};
+    const allocator = gpa.allocator();
+
+    var backend = try SDLBackend.initWindow(.{
+        .allocator = allocator,
+        .size = .{ .w = 800.0, .h = 600.0 },
+        .title = "My DVUI App",
+        .vsync = true,
+    });
+    defer backend.deinit();
+
+    var win = try dvui.Window.init(@src(), allocator, backend.backend(), .{
+        .theme = switch (backend.preferredColorScheme() orelse .light) {
+            .light => dvui.Theme.builtin.adwaita_light,
+            .dark => dvui.Theme.builtin.adwaita_dark,
+        },
+    });
+    defer win.deinit();
+
+    var interrupted = false;
+
+    main_loop: while (true) {
+        // beginWait coordinates with waitTime below to run frames only when needed
+        const nstime = win.beginWait(interrupted);
+
+        // marks the beginning of a frame for dvui, can call dvui functions after this
+        try win.begin(nstime);
+
+        // send all SDL events to dvui for processing
+        try backend.addAllEvents(&win);
+
+        // if dvui widgets might not cover the whole window, then need to clear
+        // the previous frame's render
+        _ = SDLBackend.c.SDL_SetRenderDrawColor(backend.renderer, 0, 0, 0, 255);
+        _ = SDLBackend.c.SDL_RenderClear(backend.renderer);
+
+        const keep_running = gui_frame();
+        if (!keep_running) break :main_loop;
+
+        // marks end of dvui frame, don't call dvui functions after this
+        // - sends all dvui stuff to backend for rendering, must be called before renderPresent()
+        const end_micros = try win.end(.{});
+
+        // cursor management
+        try backend.setCursor(win.cursorRequested());
+        try backend.textInputRect(win.textInputRequested());
+
+        // render frame to OS
+        try backend.renderPresent();
+
+        // waitTime and beginWait combine to achieve variable framerates
+        const wait_event_micros = win.waitTime(end_micros);
+        interrupted = try backend.waitEventTimeout(wait_event_micros);
+    }
+}
+
+fn gui_frame() bool {
+    return true;
+}