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mach: mouse cursor support (#352)

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adds mouse cursor support for standard cursors

Co-authored-by: Stephen Gutekanst <stephen.gutekanst@gmail.com>
This commit is contained in:
David Vanderson 2022-06-16 00:53:55 -04:00 • committed by GitHub
parent f5affbe7ae
commit 43bff35d2c
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46
src/platform/native.zig
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@ -20,6 +20,10 @@ pub const Platform = struct {
last_position: glfw.Window.Pos,
wait_event_timeout: f64 = 0.0,
cursors: [@typeInfo(enums.MouseCursor).Enum.fields.len]?glfw.Cursor = undefined,
cursors_tried: [@typeInfo(enums.MouseCursor).Enum.fields.len]bool =
[_]bool{false} ** @typeInfo(enums.MouseCursor).Enum.fields.len,
native_instance: gpu.NativeInstance,
const EventQueue = std.TailQueue(structs.Event);
@ -184,6 +188,14 @@ pub const Platform = struct {
};
}
pub fn deinit(platform: *Platform) void {
for (platform.cursors) |glfw_cursor| {
if (glfw_cursor) |cur| {
cur.destroy();
}
}
}
fn pushEvent(platform: *Platform, event: structs.Event) void {
const node = platform.allocator.create(EventNode) catch unreachable;
node.* = .{ .data = event };
@ -318,6 +330,39 @@ pub const Platform = struct {
return platform.last_window_size;
}
pub fn setMouseCursor(platform: *Platform, cursor: enums.MouseCursor) !void {
// Try to create glfw standard cursor, but could fail. In the future
// we hope to provide custom backup images for these.
// See https://github.com/hexops/mach/pull/352 for more info
const enum_int = @enumToInt(cursor);
const tried = platform.cursors_tried[enum_int];
if (!tried) {
platform.cursors_tried[enum_int] = true;
platform.cursors[enum_int] = switch (cursor) {
.arrow => glfw.Cursor.createStandard(.arrow) catch null,
.ibeam => glfw.Cursor.createStandard(.ibeam) catch null,
.crosshair => glfw.Cursor.createStandard(.crosshair) catch null,
.pointing_hand => glfw.Cursor.createStandard(.pointing_hand) catch null,
.resize_ew => glfw.Cursor.createStandard(.resize_ew) catch null,
.resize_ns => glfw.Cursor.createStandard(.resize_ns) catch null,
.resize_nwse => glfw.Cursor.createStandard(.resize_nwse) catch null,
.resize_nesw => glfw.Cursor.createStandard(.resize_nesw) catch null,
.resize_all => glfw.Cursor.createStandard(.resize_all) catch null,
.not_allowed => glfw.Cursor.createStandard(.not_allowed) catch null,
};
}
if (platform.cursors[enum_int]) |cur| {
try platform.window.setCursor(cur);
} else {
// TODO: In the future we shouldn't hit this because we'll provide backup
// custom cursors.
// See https://github.com/hexops/mach/pull/352 for more info
std.debug.print("mach: setMouseCursor: {s} not yet supported\n", .{cursor});
}
}
pub fn hasEvent(platform: *Platform) bool {
return platform.events.first != null;
}
@ -496,6 +541,7 @@ pub fn main() !void {
const allocator = gpa.allocator();
var engine = try Engine.init(allocator);
defer engine.internal.deinit();
var app: App = undefined;
try app.init(&engine);