From b2aa1817b6316bd2b7002231bee6390f07361aa9 Mon Sep 17 00:00:00 2001
From: pommicket <pommicket@gmail.com>
Date: Thu, 24 Aug 2023 22:04:16 -0400
Subject: controls

---
 index.html | 57 ++++++++++++++++++++++++++++++++++++++++++++++++++++-----
 pugl.js    | 41 +++++++++++++++++++++++++++++++++--------
 2 files changed, 85 insertions(+), 13 deletions(-)

diff --git a/index.html b/index.html
index dd8853c..9c5a189 100644
--- a/index.html
+++ b/index.html
@@ -85,6 +85,13 @@
 	input[type=submit]:active, button:active {
 		background-color: #fff9;
 	}
+	input[type=submit][disabled]:hover,
+	input[type=submit][disabled]:active,
+	button[disabled]:hover,
+	button[disabled]:active {
+		background-color: transparent;
+		cursor: not-allowed;
+	}
 	input:focus, [contenteditable]:focus, button:focus {
 		outline: 2px solid #77f;
 	}
@@ -207,6 +214,26 @@
 	input[type=number] {
 		-moz-appearance: textfield;
 	}
+	.img-button img, .img-button svg {
+		height: 2em;
+		display: block;
+	}
+	.img-button[disabled] img, 
+	.img-button[disabled] svg {
+		filter: brightness(50%);
+	}
+	.ui-section {
+		margin: 0.3em;
+	}
+	.ui-section label {
+		margin: auto;
+	}
+	.inline-block {
+		display: inline-block;
+	}
+	.no-wrap {
+		whitespace: no-wrap;
+	}
 	</style>
 	<meta charset="utf-8">
 	<meta content="width=device-width,initial-scale=1" name="viewport">
@@ -227,19 +254,39 @@
 			<div id="title">
 				<img src="icon.png"> pugl
 			</div>
-			<form action="#" method="dialog" id="code-form">
+			<form action="#" method="dialog" id="code-form" class="ui-section inline-block">
 				<input type="text" placeholder="Code" id="code">
 				<input type="submit" value="import">
 			</form>
-			<form action="#" method="dialog" id="resolution-form">
+			<form action="#" method="dialog" id="resolution-form" class="ui-section inline-block">
 				<input type="number" placeholder="width" id="resolution-x">
 				×
 				<input type="number" placeholder="height" id="resolution-y">
 				<input type="submit" value="change resolution">
 			</form>
-			Add <input type="text" id="widget-search" placeholder="Search">
-			<div id="widget-choices"></div>
-			<div id="widgets-container"></div>
+			<div class="ui-section">
+				<div class="inline-block no-wrap">
+					<button id="play" class="img-button" disabled>
+						<img alt="play" src="data:image/svg+xml;base64,PHN2ZyB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciIHdpZHRoPSIzMiIgaGVpZ2h0PSIzMiI+PHBhdGggZD0iTSA2IDI2IEwgMjYgMTYgTCA2IDYgeiIgZmlsbD0iI2ZmZiIgc3Ryb2tlPSJub25lIiAvPjwvc3ZnPgo=">
+					</button>
+					<button id="pause" class="img-button">
+						<img alt="pause" src="data:image/svg+xml;base64,PHN2ZyB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciIHdpZHRoPSIzMiIgaGVpZ2h0PSIzMiI+CjxwYXRoIGQ9Ik0gNiA2IGwgMCAyMCBsIDcgMCBsIDAgLTIwIHogTSAxOSA2IGwgMCAyMCBsIDcgMCBsIDAgLTIwIHoiIGZpbGw9IiNmZmYiIHN0cm9rZT0ibm9uZSIgLz4KPC9zdmc+Cg==">
+					</button>
+					<button id="step" class="img-button" disabled>
+						<img alt="step" src="data:image/svg+xml;base64,PHN2ZyB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciIHdpZHRoPSIzMiIgaGVpZ2h0PSIzMiI+CjxwYXRoIGQ9Ik0gNiA2IGwgMCAyMCBsIDQgMCBsIDAgLTIwIHogTSAxNCA2IGwgMTIgMTAgbCAtMTIgMTAgeiIgZmlsbD0iI2ZmZiIgc3Ryb2tlPSJub25lIiAvPgo8L3N2Zz4K">
+					</button>
+				</div>
+				&nbsp;
+				<div class="inline-block no-wrap" title="automatically update display when anything is changed">
+					<input id="auto-update" type="checkbox">
+					<label for="auto-update">auto-update</label>
+				</div>
+			</div>
+			<div class="ui-section">
+				Add <input type="text" id="widget-search" placeholder="Search">
+				<div id="widget-choices"></div>
+				<div id="widgets-container"></div>
+			</div>
 		</div>
 		
 		<div id="ui-resize"></div>
diff --git a/pugl.js b/pugl.js
index f200a19..6de9dd5 100644
--- a/pugl.js
+++ b/pugl.js
@@ -2,11 +2,9 @@
 
 /*
 TODO:
+- reset button
+- guide
 - about dialog
-- pause
-- settings:
-  - enable/disable auto-update
-  - resolution
 */
 
 const APP_ID = 'dh3YgVZQdX1Q';
@@ -34,11 +32,12 @@ let widgets_container;
 let code_input;
 let error_element;
 let parsed_widgets;
+let paused = false;
 
 const mouse_pos_ndc = Object.preventExtensions({ x: 0, y: 0 });
 
-let render_width = 1080,
-	render_height = 1080;
+let render_width = 1080;
+let render_height = 1080;
 const GLSL_FLOAT_TYPES = ['float', 'vec2', 'vec3', 'vec4'];
 const GLSL_FLOAT_TYPE_PAIRS = GLSL_FLOAT_TYPES.flatMap((x) =>
 	GLSL_FLOAT_TYPES.map((y) => [x, y]),
@@ -910,7 +909,7 @@ float worley(vec3 p, vec3 freq) {
 ];
 
 function auto_update_enabled() {
-	return true;
+	return document.getElementById('auto-update').checked;
 }
 
 function is_input(element) {
@@ -2367,6 +2366,30 @@ function startup() {
 		import_widgets(code_input.value);
 	});
 
+	const pause_element = document.getElementById('pause');
+	const play_element = document.getElementById('play');
+	const step_element = document.getElementById('step');
+	function update_step_buttons() {
+		play_element.disabled = !paused;
+		pause_element.disabled = paused;
+		step_element.disabled = !paused;
+	}
+
+	// ideally we would just put the initial state into the HTML
+	// but fucking firefox https://bugzilla.mozilla.org/show_bug.cgi?id=654072
+	update_step_buttons();
+	pause_element.addEventListener('click', () => {
+		paused = true;
+		update_step_buttons();
+	});
+	play_element.addEventListener('click', () => {
+		paused = false;
+		update_step_buttons();
+	});
+	step_element.addEventListener('click', () => {
+		perform_step();
+	});
+
 	gl = canvas.getContext('webgl2');
 	if (gl === null) {
 		// support for very-old-but-not-ancient browsers
@@ -2518,7 +2541,9 @@ function frame(time) {
 	canvas.style.left = canvas_x + 'px';
 	canvas.style.top = canvas_y + 'px';
 
-	perform_step();
+	if (!paused) {
+		perform_step();
+	}
 
 	gl.bindFramebuffer(gl.FRAMEBUFFER, null);
 	gl.viewport(0, 0, viewport_width, viewport_height);
-- 
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