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gtk: char input

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This commit is contained in:
Mitchell Hashimoto
2023-02-23 13:51:07 -08:00
parent 358ce5a24e
commit 4fe7b9b3f2
1 changed files with 33 additions and 1 deletions
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34
src/apprt/gtk.zig
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@ -199,17 +199,27 @@ pub const Surface = struct {
pub fn init(self: *Surface, app: *App, opts: Options) !void {
const widget = @ptrCast(*c.GtkWidget, opts.gl_area);
// Add our event controllers
// Key event controller will tell us about raw keypress events.
const ec_key = c.gtk_event_controller_key_new();
errdefer c.g_object_unref(ec_key);
c.gtk_widget_add_controller(widget, ec_key);
errdefer c.gtk_widget_remove_controller(widget, ec_key);
// Focus controller will tell us about focus enter/exit events
const ec_focus = c.gtk_event_controller_focus_new();
errdefer c.g_object_unref(ec_focus);
c.gtk_widget_add_controller(widget, ec_focus);
errdefer c.gtk_widget_remove_controller(widget, ec_focus);
// Tell the key controller that we're interested in getting a full
// input method so raw characters/strings are given too.
const im_context = c.gtk_im_multicontext_new();
errdefer c.g_object_unref(im_context);
c.gtk_event_controller_key_set_im_context(
@ptrCast(*c.GtkEventControllerKey, ec_key),
im_context,
);
// The GL area has to be focusable so that it can receive events
c.gtk_widget_set_focusable(widget, 1);
c.gtk_widget_set_focus_on_click(widget, 1);
@ -232,6 +242,7 @@ pub const Surface = struct {
_ = c.g_signal_connect_data(ec_key, "key-pressed", c.G_CALLBACK(&gtkKeyPressed), self, null, c.G_CONNECT_DEFAULT);
_ = c.g_signal_connect_data(ec_focus, "enter", c.G_CALLBACK(&gtkFocusEnter), self, null, c.G_CONNECT_DEFAULT);
_ = c.g_signal_connect_data(ec_focus, "leave", c.G_CALLBACK(&gtkFocusLeave), self, null, c.G_CONNECT_DEFAULT);
_ = c.g_signal_connect_data(im_context, "commit", c.G_CALLBACK(&gtkInputCommit), self, null, c.G_CONNECT_DEFAULT);
}
fn realize(self: *Surface) !void {
@ -396,6 +407,27 @@ pub const Surface = struct {
return 0;
}
fn gtkInputCommit(
_: *c.GtkIMContext,
bytes: [*:0]u8,
ud: ?*anyopaque,
) callconv(.C) void {
const str = std.mem.sliceTo(bytes, 0);
const view = std.unicode.Utf8View.init(str) catch |err| {
log.warn("cannot build utf8 view over input: {}", .{err});
return;
};
const self = userdataSelf(ud.?);
var it = view.iterator();
while (it.nextCodepoint()) |cp| {
self.core_surface.charCallback(cp) catch |err| {
log.err("error in char callback err={}", .{err});
return;
};
}
}
fn gtkFocusEnter(_: *c.GtkEventControllerFocus, ud: ?*anyopaque) callconv(.C) void {
const self = userdataSelf(ud.?);
self.core_surface.focusCallback(true) catch |err| {