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May 5, 2025 18:06
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Deephaven Theme - Iframe Tester
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| <!DOCTYPE html> | |
| <html lang="en"> | |
| <head> | |
| <meta charset="UTF-8" /> | |
| <meta name="viewport" content="width=device-width, initial-scale=1.0" /> | |
| <title>Deephaven Iframe Tester</title> | |
| <style> | |
| html, | |
| body { | |
| background-color: green; | |
| margin: 0; | |
| font-family: sans-serif; | |
| } | |
| body::before { | |
| color: white; | |
| font-size: 2rem; | |
| position: absolute; | |
| top: 0; | |
| display: flex; | |
| align-items: center; | |
| justify-content: center; | |
| content: 'Parent Container'; | |
| width: 100%; | |
| height: 100%; | |
| } | |
| iframe { | |
| display: block; | |
| position: relative; | |
| width: 100vw; | |
| height: 100vh; | |
| border: none; | |
| } | |
| #btnUpdateTheme { | |
| position: absolute; | |
| bottom: 0; | |
| padding: 0.5rem 1rem; | |
| } | |
| </style> | |
| </head> | |
| <body> | |
| <iframe | |
| src="http://localhost:4000?theme=external-theme&preloadTransparentTheme=true" | |
| ></iframe> | |
| <button id="btnUpdateTheme" onclick="onUpdateClick()">Update Theme</button> | |
| <script> | |
| const MSG_REQUEST_GET_THEME = | |
| 'io.deephaven.message.ThemeModel.requestExternalTheme'; | |
| const MSG_REQUEST_SET_THEME = | |
| 'io.deephaven.message.ThemeModel.requestSetTheme'; | |
| const iframeEl = document.querySelector('iframe'); | |
| const updateBtnEl = document.getElementById('btnUpdateTheme'); | |
| const childWindow = iframeEl.contentWindow; | |
| window.addEventListener('message', onMessage); | |
| updateBtnEl.addEventListener('click', onUpdateClick); | |
| /** Handle postMessage events from the child iframe */ | |
| function onMessage({ data, origin, source }) { | |
| if (origin !== 'http://localhost:4000') { | |
| return; | |
| } | |
| if (data.message === MSG_REQUEST_GET_THEME) { | |
| source.postMessage( | |
| { | |
| id: data.id, | |
| payload: { | |
| name: 'Iframe External Theme', | |
| cssVars: { | |
| '--dh-color-bg': 'red', | |
| }, | |
| }, | |
| }, | |
| origin | |
| ); | |
| } | |
| } | |
| /** Handle click on the update button */ | |
| function onUpdateClick() { | |
| childWindow?.postMessage( | |
| { | |
| message: MSG_REQUEST_SET_THEME, | |
| payload: { | |
| name: 'Iframe External Theme', | |
| cssVars: { | |
| '--dh-color-bg': getRandomHexColor(), | |
| }, | |
| }, | |
| }, | |
| 'http://localhost:4000' | |
| ); | |
| } | |
| function getRandomHexColor() { | |
| return `#${Math.floor(Math.random() * 16777215) | |
| .toString(16) | |
| .padStart(6, '0')}`; | |
| } | |
| </script> | |
| </body> | |
| </html> |
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