2025-08-15 14:55:23 +03:00
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<title>Signal API Demo</title>
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<icon src="https://upload.wikimedia.org/wikipedia/commons/thumb/c/cf/Lua-Logo.svg/256px-Lua-Logo.svg.png">
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<meta name="theme-color" content="#8b5cf6">
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<meta name="description" content="Demonstrating the new Signal API with custom events">
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<style>
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body { bg-[#f8fafc] p-6 }
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h1 { text-[#8b5cf6] text-3xl font-bold text-center }
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h2 { text-[#6d28d9] text-xl font-semibold }
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.container { bg-[#ffffff] p-6 rounded-lg shadow-lg max-w-4xl mx-auto }
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.button-group { flex gap-3 justify-center items-center flex-wrap }
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.signal-button { px-4 py-2 rounded-lg font-medium cursor-pointer transition-colors }
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.fire-btn { bg-[#10b981] text-white hover:bg-[#059669] }
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.connect-btn { bg-[#3b82f6] text-white hover:bg-[#2563eb] }
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.disconnect-btn { bg-[#ef4444] text-white hover:bg-[#dc2626] }
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.log-area { bg-[#f1f5f9] p-4 rounded-lg min-h-32 font-mono text-sm }
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.status-display { bg-[#ddd6fe] p-3 rounded-md text-[#5b21b6] font-mono }
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.info-box { bg-[#fef3c7] border border-[#f59e0b] p-4 rounded-lg }
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</style>
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<script>
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-- Create custom signals
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local mySignal = Signal.new()
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local dataSignal = Signal.new()
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local userActionSignal = Signal.new()
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print(".container > div: ", gurt.selectAll('.container > div'))
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print(".container div: ", gurt.selectAll('.container div'))
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print("button[disabled]: ", gurt.selectAll('button[disabled]'))
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print(".container: ", gurt.selectAll('.container'))
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print("#log-area: ", gurt.selectAll('#log-area'))
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-- Get UI elements
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local logArea = gurt.select('#log-area')
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local statusDisplay = gurt.select('#status-display')
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local connectBtn = gurt.select('#connect-btn')
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local disconnectBtn = gurt.select('#disconnect-btn')
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local fireBtn = gurt.select('#fire-btn')
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local fireDataBtn = gurt.select('#fire-data-btn')
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local clearLogBtn = gurt.select('#clear-log-btn')
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2025-09-01 17:08:47 +03:00
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trace.log('Signal API demo script started.')
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2025-08-15 14:55:23 +03:00
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local logMessages = {}
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local connectionCount = 0
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local activeConnections = {}
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-- Function to add message to log
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local function addLog(message)
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table.insert(logMessages, Time.format(Time.now(), '%H:%M:%S') .. ' - ' .. message)
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if #logMessages > 20 then
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table.remove(logMessages, 1)
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end
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2025-08-27 20:56:29 +03:00
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logArea.text = table.concat(logMessages, '\n')
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2025-08-15 14:55:23 +03:00
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end
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-- Function to update status
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local function updateStatus()
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statusDisplay.text = 'Active Connections: ' .. #activeConnections .. '\\nTotal Events Fired: ' .. connectionCount
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end
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-- Signal handlers
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local function onMySignal(arg1, arg2)
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addLog('mySignal fired with args: ' .. (arg1 or 'nil') .. ', ' .. (arg2 or 'nil'))
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end
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local function onDataSignal(data)
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addLog('dataSignal received: ' .. table.tostring(data))
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end
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local function onUserAction(action, timestamp)
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addLog('userActionSignal: ' .. action .. ' at ' .. timestamp)
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end
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-- Connect button
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connectBtn:on('click', function()
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-- Connect multiple handlers to demonstrate multiple connections
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local conn1 = mySignal:connect(onMySignal)
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local conn2 = dataSignal:connect(onDataSignal)
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local conn3 = userActionSignal:connect(onUserAction)
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table.insert(activeConnections, conn1)
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table.insert(activeConnections, conn2)
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table.insert(activeConnections, conn3)
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addLog('Connected 3 signal handlers')
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updateStatus()
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end)
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-- Disconnect button
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disconnectBtn:on('click', function()
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for i = 1, #activeConnections do
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activeConnections[i]:disconnect()
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end
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activeConnections = {}
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addLog('Disconnected all signal handlers')
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updateStatus()
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end)
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-- Fire simple signal
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fireBtn:on('click', function()
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mySignal:fire('Hello', 123)
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connectionCount = connectionCount + 1
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addLog('Fired mySignal with two arguments')
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updateStatus()
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end)
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-- Fire data signal
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fireDataBtn:on('click', function()
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local sampleData = {
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user = 'Alice',
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score = math.random(100, 999),
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items = {'sword', 'shield', 'potion'}
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}
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dataSignal:fire(sampleData)
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connectionCount = connectionCount + 1
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addLog('Fired dataSignal with complex data')
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updateStatus()
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end)
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-- Fire user action signal
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gurt.body:on('keypress', function(keyInfo)
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if #activeConnections > 0 then
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userActionSignal:fire('keypress: ' .. keyInfo.key, Time.format(Time.now(), '%H:%M:%S'))
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connectionCount = connectionCount + 1
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updateStatus()
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end
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end)
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-- Clear log button
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clearLogBtn:on('click', function()
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logMessages = {}
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logArea.text = 'Log cleared.'
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addLog('Log area cleared')
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end)
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-- Initialize with some sample connections
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local initialConn = mySignal:connect(function(a, b)
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addLog('Initial handler triggered with: ' .. (a or 'nil') .. ', ' .. (b or 'nil'))
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end)
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table.insert(activeConnections, initialConn)
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addLog('Signal API demo initialized')
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addLog('Try connecting handlers and firing signals!')
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addLog('Press any key to trigger userActionSignal (when connected)')
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updateStatus()
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</script>
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</head>
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<body>
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<h1>🔔 Signal API Demo</h1>
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<div style="container mt-6">
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<div style="info-box mb-6">
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<p><strong>Signal API Usage Example:</strong></p>
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<p><code>local mySignal = Signal.new()</code></p>
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<p><code>mySignal:connect(function(arg1, arg2) print("Event fired with: ", arg1, arg2) end)</code></p>
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<p><code>mySignal:fire("Hello", 123)</code></p>
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<p><code>connection:disconnect()</code></p>
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</div>
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<h2>Controls</h2>
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<div style="button-group mb-6">
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<button id="connect-btn" style="signal-button connect-btn">🔗 Connect Handlers</button>
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<button id="disconnect-btn" style="signal-button disconnect-btn">❌ Disconnect All</button>
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<button id="fire-btn" style="signal-button fire-btn">🔔 Fire Simple Signal</button>
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<button id="fire-data-btn" style="signal-button fire-btn">📊 Fire Data Signal</button>
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<button id="clear-log-btn" style="signal-button">🧹 Clear Log</button>
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</div>
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<h2>Status</h2>
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<div style="status-display mb-6">
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<pre id="status-display">Loading status...</pre>
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</div>
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<h2>Event Log</h2>
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<div style="log-area mb-6">
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<pre id="log-area">Initializing...</pre>
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</div>
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<div style="bg-[#e0f2fe] p-4 rounded-lg">
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<h3 style="text-[#0277bd] font-semibold mb-2">Signal API Features:</h3>
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<ul style="text-[#01579b] space-y-1">
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<li><strong>Signal.new():</strong> Creates a new signal object</li>
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<li><strong>signal:connect(callback):</strong> Connects a callback function and returns a connection object</li>
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<li><strong>signal:fire(...):</strong> Fires the signal with optional arguments</li>
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<li><strong>connection:disconnect():</strong> Disconnects a specific connection</li>
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<li><strong>signal:disconnect():</strong> Disconnects all connections from the signal</li>
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<li><strong>Multiple Connections:</strong> One signal can have multiple connected callbacks</li>
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<li><strong>Argument Passing:</strong> Signals can pass multiple arguments to connected callbacks</li>
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</ul>
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</div>
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<button disabled="true">Test</button>
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<button disabled="true">Test2</button>
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</div>
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</body>
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