41 lines
1.4 KiB
Zig
41 lines
1.4 KiB
Zig
//! A treevent is an event which is propagated through the tree.
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//! To fire a treevent, the treevent function is called on the respective widget.
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//! This function may call a treevent's dispatch function (which must be present in all treevents!)
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//! and handle a treevent accordingly. It may also choose not to call dispatch on the treevent, or
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//! to conditionally dispatch it.
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//!
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//! Treevents are encouraged to have a fire function, taking a self parameter and a widget.
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//! This function can be used by code firing a treevent and can, for example, contain code
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//! to to things after the treevent has been fully dispatched or to only conditionally fire it.
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const std = @import("std");
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const Widget = @import("widget.zig").Widget;
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test {
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_ = Click;
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_ = Draw;
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_ = LayoutPosition;
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_ = LayoutSize;
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_ = Link;
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_ = MouseMove;
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}
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pub const Click = @import("treevents/Click.zig");
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pub const Draw = @import("treevents/Draw.zig");
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pub const LayoutPosition = @import("treevents/LayoutPosition.zig");
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pub const LayoutSize = @import("treevents/LayoutSize.zig");
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pub const Link = @import("treevents/Link.zig");
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pub const MouseMove = @import("treevents/MouseMove.zig");
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pub fn fire(widget: *Widget, tv: anytype) !void {
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const Tv = @TypeOf(tv);
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var tvv = tv;
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if (std.meta.hasFn(Tv, "preFire")) {
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try tvv.preFire();
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}
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try widget.treevent(tv);
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if (std.meta.hasFn(Tv, "postFire")) {
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try tvv.postFire();
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}
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}
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