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Redesign events API to use ranges and to facilitate integration into extern event loops #53

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Merged
gdamore merged 3 commits into from
Dec 14, 2025
Merged

Redesign events API to use ranges and to facilitate integration into extern event loops #53

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f37e28a
feat!: refactor event API to use idiomatic go ranges
gdamore Dec 14, 2025
01a7a77
feat: expose file based constructor
gdamore Dec 14, 2025
5200bc5
chore: fix various minor nits - comment clarifications for events, de…
gdamore Dec 14, 2025
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94 changes: 68 additions & 26 deletions demos/colors/source/colors.d
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Original file line number Diff line number Diff line change
Expand Up @@ -10,6 +10,7 @@
*/
module color;

import core.time;
import std.stdio;
import std.string;
import std.random;
Expand All @@ -29,13 +30,15 @@ class ColorBoxes
Random rng;
enum inc = 8;
int cnt;
bool done;
Screen s;

bool flip()
{
return (rng.uniform!ubyte() & 0x1) != 0;
}

this()
this(Screen scr)
{
rng = rndGen();
r = rng.uniform!ubyte();
Expand All @@ -44,9 +47,10 @@ class ColorBoxes
ri = inc;
gi = inc / 4; // humans are very sensitive to green
bi = inc;
s = scr;
}

void makeBox(Screen s)
void makeBox()
{
Coord wsz = s.size();
dchar dc = ' ';
Expand Down Expand Up @@ -117,31 +121,9 @@ class ColorBoxes
}
s.show();
}
}

void main()
{
import std.stdio;
import core.time;
import core.stdc.stdlib;

auto s = newScreen();
assert(s !is null);
scope (exit)
{
s.stop();
}

ColorBoxes cb = new ColorBoxes();

auto now = MonoTime.currTime();

s.start();
bool done = false;
while (!done)
void handleEvent(Event ev)
{
cb.makeBox(s);
auto ev = s.waitEvent(msecs(50));
switch (ev.type)
{
case EventType.key:
Expand Down Expand Up @@ -173,8 +155,68 @@ void main()
default:
}
}

void run()
{
s.start();
scope (exit)
{
s.stop();
}
done = false;
makeBox();
while (!done)
{
loop: foreach (ev; s.events())
{
switch (ev.type)
{
case EventType.key:
switch (ev.key.key)
{
case Key.esc, Key.enter:
done = true;
break loop;
case Key.graph:
// Ctrl-L (without other modifiers) used to force a redraw.
if (ev.key.ch == 'l' && ev.key.mod == Modifiers.ctrl)
{
s.resize();
s.sync();
}
break;
default:
}
break;
case EventType.resize:
s.resize();
break;
case EventType.closed:
done = true;
break loop;
case EventType.error:
assert(0, "error received");
default:
}
}
makeBox();
s.position = Coord(1, 1);
s.waitForEvent(msecs(50));
}
}
}

void main()
{
import std.stdio;
import core.time;
import core.stdc.stdlib;

ColorBoxes cb = new ColorBoxes(newScreen());

auto now = MonoTime.currTime();
cb.run();
auto end = MonoTime.currTime();
s.stop();
writefln("Drew %d boxes in %s.", cb.cnt, end - now);
writefln("Average per box %s.", (end - now) / cb.cnt);
}
9 changes: 6 additions & 3 deletions demos/hello/source/hello.d
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Original file line number Diff line number Diff line change
Expand Up @@ -29,7 +29,7 @@ void displayHelloWorld(Screen s)
def.bg = Color.silver;
def.fg = Color.black;
s.clear();
Style style = {fg: Color.red, bg: Color.papayaWhip};
Style style = {fg: Color.navy, bg: Color.papayaWhip};
centerStr(s, size.y / 2 - 1, style, " Hello There! ");
centerStr(s, size.y / 2 + 1, def, " Press ESC to exit. ");

Expand Down Expand Up @@ -79,7 +79,10 @@ void main()
displayHelloWorld(ts);
for (;;)
{
Event ev = ts.waitEvent();
handleEvent(ts, ev);
ts.waitForEvent();
foreach (ev; ts.events())
{
handleEvent(ts, ev);
}
}
}
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