https://homeostasis.scs.carleton.ca/wiki/index.php?action=history&feed=atom&title=Mobile_App_Development_2022W_Lecture_18 2026-04-06T01:53:56Z Revision history for this page on the wiki MediaWiki 1.42.1 https://homeostasis.scs.carleton.ca/wiki/index.php?title=Mobile_App_Development_2022W_Lecture_18&diff=23955&oldid=prev 2022-03-23T17:37:25Z

<p>Created page with &quot;==Video== Video from the lecture given on March 23, 2022 is now available: * [https://homeostasis.scs.carleton.ca/~soma/mad-2022w/lectures/comp1601-2022w-lec18-20220323.m4v video] * [https://homeostasis.scs.carleton.ca/~soma/mad-2022w/lectures/comp1601-2022w-lec18-20220323.cc.vtt auto-generated captions] Video is also available through Brightspace (Resources-&gt;Zoom Meetings (Recordings, etc.)-&gt;Cloud Recordings tab). Note that here you&#039;ll also see chat messages. ==Notes...&quot;</p> <p><b>New page</b></p><div>==Video==<br /> <br /> Video from the lecture given on March 23, 2022 is now available:<br /> * [https://homeostasis.scs.carleton.ca/~soma/mad-2022w/lectures/comp1601-2022w-lec18-20220323.m4v video]<br /> * [https://homeostasis.scs.carleton.ca/~soma/mad-2022w/lectures/comp1601-2022w-lec18-20220323.cc.vtt auto-generated captions]<br /> Video is also available through Brightspace (Resources-&gt;Zoom Meetings (Recordings, etc.)-&gt;Cloud Recordings tab). Note that here you&#039;ll also see chat messages.<br /> <br /> ==Notes==<br /> &lt;pre&gt;<br /> Lecture 18<br /> ----------<br /> <br /> Assigment 3 was due today (March 23rd)<br /> Assignment 4 is due April 8th, last day of classes<br /> - I need to discuss solutions with you then<br /> - it will come out by Friday<br /> <br /> Final exam is on April 14th<br /> <br /> I will go over solutions for A3 on March 30th.<br /> - so that is the hard deadline<br /> I&#039;ll go over midterm answers on March 25th or April 1st, depending.<br /> - first need to give you all grades<br /> <br /> Today we&#039;ll go through Tutorial 9<br /> - maybe continue on Friday<br /> <br /> There is no more Tutorial 10 - Tutorial 9 is the last one<br /> <br /> <br /> So where do we have state in PicViewer2?<br /> - The actual image has a position x,y (and a scale and rotation)<br /> - the EditText&#039;s have their own values for x, y, scale, and rotation<br /> - we have to manually keep these in sync<br /> - and when we drag an image, we change the image&#039;s position but<br /> we don&#039;t automatically update the edittext&#039;s for x and y,<br /> so we have to do that manually<br /> Note how we can&#039;t centralize state like we do in SwiftUI<br /> &lt;/pre&gt;</div>

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