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examples: add vaxis example
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build.zig
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build.zig
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examples/vaxis.zig
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examples/vaxis.zig
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const std = @import("std");
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const vaxis = @import("vaxis");
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const Cell = vaxis.Cell;
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const Event = union(enum) {
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key_press: vaxis.Key,
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winsize: vaxis.Winsize,
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};
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pub fn main() !void {
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var gpa = std.heap.GeneralPurposeAllocator(.{}){};
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defer {
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const deinit_status = gpa.deinit();
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//fail test; can't try in defer as defer is executed after we return
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if (deinit_status == .leak) {
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std.log.err("memory leak", .{});
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}
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}
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const alloc = gpa.allocator();
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var vx = try vaxis.init(alloc, .{});
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defer vx.deinit(alloc);
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var loop: vaxis.Loop(Event) = .{ .vaxis = &vx };
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try loop.run();
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defer loop.stop();
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try vx.enterAltScreen();
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try vx.queryTerminal();
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const lower_limit = 30;
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var color_idx: u8 = lower_limit;
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var dir: enum {
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up,
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down,
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} = .up;
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// block until we get a resize
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while (true) {
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const event = loop.nextEvent();
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switch (event) {
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.key_press => |key| if (key.matches('c', .{ .ctrl = true })) return,
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.winsize => |ws| {
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try vx.resize(alloc, ws);
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break;
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},
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}
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}
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while (true) {
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while (loop.tryEvent()) |event| {
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switch (event) {
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.key_press => |key| if (key.matches('c', .{ .ctrl = true })) return,
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.winsize => |ws| try vx.resize(alloc, ws),
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}
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}
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const win = vx.window();
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win.clear();
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const style: vaxis.Style = .{ .fg = .{ .rgb = [_]u8{ color_idx, color_idx, color_idx } } };
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const segment: vaxis.Segment = .{
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.text = vaxis.logo,
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.style = style,
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};
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const center = vaxis.widgets.alignment.center(win, 28, 4);
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_ = try center.printSegment(segment, .{ .wrap = .grapheme });
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try vx.render();
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std.time.sleep(8 * std.time.ns_per_ms);
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switch (dir) {
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.up => {
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color_idx += 1;
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if (color_idx == 255) dir = .down;
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},
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.down => {
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color_idx -= 1;
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if (color_idx == lower_limit) dir = .up;
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},
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}
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}
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}