VT16 - DA355A - Geolocation & media
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Transcript of VT16 - DA355A - Geolocation & media
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HTML 5 – Media & Geolocation
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Dagens agenda• Geolocation i webbapplikationer
• Hur vi kan ta reda på användarens plats
• Media i webbapplikationer
• Hur man hanterar media i webbapplikationer
• Exempel på hur man kan styra webbplatser kring val av filer
• Om inlämningsuppgift 2
• Om projektet
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Geolocation
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Geolocation• JavaScript gör det möjligt för oss att ta reda på enhetens position.
• Det krävs att användaren godkänner att vi får ta del av dennas position
Vissa webbläsare kräver https
• Får svar i form av koordinatorer m.m.
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Funktion - getCurrentPosition• Den vanligaste funktionen som används är:
getCurrentPosition
• Den kallas genom JavaScript-objektet ”navigatior” navigator.geolocation.getCurrentPosition();
• Funktionen tar 3st parametrar Funktion för success
Funktion för fail
Egenskaper att skicka med
• navigator.geolocation.getCurrentPosition(onSuccess,onFail,{enableHighAccuracy: true}
);
• OBS anropet sker asynkront
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Första exempel
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Svar från getCurrentPosition()
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DemoHämta vår position
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https://goo.gl/CXD9eeDemo
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Filuppladdning
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Att ladda upp filer genom HTML• Vi behöver ett formulär!
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Attributet: enctype
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Att ladda upp filer
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Klient - HTML
Server – PHP (server.php)
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Test av filuppladdninghttp://localhost:8000/
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Men användaren kunde ju välja vilken filtyp som helst?
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Kom ihåg!- Olika typer av input!
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https://goo.gl/PGf24I
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https://www.w3schools.com/TAGs/att_input_accept.asp
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https://www.w3.org/TR/html-media-capture/
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https://goo.gl/0ZzS2U
Demo på detta.
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Att visa upp bilder, video, ljud
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Foto
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Att visa upp bilder
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Video
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Att visa upp video
https://www.w3schools.com/html/html5_video.asp
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Olika video-widgets i olika webbläsare
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Attribut för <video>
https://www.w3schools.com/tags/tag_video.asp
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Support för video i olika webbläsare
https://www.w3schools.com/tags/tag_video.asp
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JavaScript API för <video>
https://www.w3schools.com/tags/ref_av_dom.asp
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Ljud
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Att visa upp ljud
https://www.w3schools.com/html/html5_audio.asp
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Olika ljud-widgets i olika webbläsare
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Support för ljud i olika webbläsare
https://www.w3schools.com/html/html5_audio.asp
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JavaScript API för <video>
https://www.w3schools.com/tags/ref_av_dom.asp
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Demo av ljud, bild, video
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Ajaxuppladdning av filer… och om begränsningar…
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Att ladda upp filer
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http://jquery.malsup.com/form/Plugin som underlättar att skicka filer genom Ajax
http://tibbelit.se/mah/da117a/file-upload/api.html
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Frågor?
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Del 2 - Projekt
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Tre val
1. Göra en mobil-/tabletanpassad/desktop webbplats av en befintlig (ej anpassad) webbplats
Fokus på användbarhet/gränssnitt för olika enheter
2. Bygga en egen applikation mot minst ett API
Bygga en applikation som ser mervärde/förenkling av datakälla
3. Bygga en egen applikation med datavisulaisering (d3.js)
Bygga en applikation med fokus på datavisualisering för data
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Projektet ska godkännas av mig/AleksanderPresentation av projekt: 21/23 mars
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Nästa laboration