Moving divisions

2. Watch at home the following video from DIYWebmastery (7-1/2 min):

Image Formats: Understanding images

transparency

Class preparation

1. Watch at home the following video by Jake Wright (12 mins):

CSS: Learn CSS in 12 minutes

2. Watch at home the following video from DIYWebmastery (7-1/2 min):

Image Formats: Understanding images

3. Learn about the RGB color format; play with the color selector at w3Schools.com

We will also go over the basics of images and color formats.

Class work

Topics for today

General purpose editors: Notepad (Win), TextEdit (Mac), Sublime (Win/mac/linux)
How to specify colors: color codes, RGB, HSL, hexadecimal
Image depth: 8-bits, 24-bits
Transparency: the alpha channel, RGBA, HSLA
Image formats for webpages: GIF, JPG, PNG
Adding styles: the style tag vs. the style sheet
CSS (Cascade Style Sheets)

Workfiles

Download in class: classpak2.zip

We start from were we left off last week, adding the style:

webpage 3: We silhouette the containers so we can see them, for debugging purposes. Then, we get started rescaling the images:

/* classes are targeted as .class-name */
.yellow-bg {
	background-color: rgb(251,202,60);
}

/* ids are targeted as #id */
#container {
	background-color: white;
}

webpage 4: taking care of the body and the container.

/* classes are targeted as .class-name */
.yellow-bg {
	background-color: rgb(251,202,60);
}

/* ids are targeted as #id */
#container {
    background-color: white;
}

/* --- temporary backgrounds --- */

#header, #footer {
    background-color: aqua;
}

#content {
    background-color: yellow;
}

#title {
    background-color: salmon;
}

#nav {
    background-color: salmon;
}

#main {
    background-color: gray;
}

#logo, #my_pic {
    background-color: skyblue;
}

#my_text {
    background-color: palegreen;
}

webpage 5: taking care of the header.

/* 'body' is not an id so it doesn't have a hash mark */
body {
    background-color: rgb(251,202,60);
}

/* backgrounds of each division colored so we can tell them apart */
#container {
    background-color: white;
}

#header, #footer {
    background-color: aqua;
}

#content {
    background-color: yellow;
}


#title {
    background-color: salmon;
}

#nav {
    background-color: salmon;
}

#main {
    background-color: gray;
}


#logo, #my_pic {
    background-color: skyblue;
}

#my_text {
    background-color: palegreen;
}

#logo_pic {
	width: 120px;
	height: 120px;
	margin: 2px;
}

#main_pic {
	width: 300px;
	height: 207px;
}

webpage 6: taking care of the content.

#content, #footer, #main, #nav, #my_pic, #my_text {
	border-style: solid;
	border-width: 1px;
	border-color: rgb(31,109,183);
}

#logopic {
	width: 120px;
	height: 120px;
	margin: 2px;
}

#pairpic {
	width: 300px;
	height: 207px;
}

body {
	font-family: Helvetica, Arial, sans-serif;
	background-color: rgb(253,213,64);
}

#container {
	border-style: solid;
	border-width: 1px;
	border-color: rgb(31,109,183);
	background-color: white;
	width: 800px;
	/* the auto centers the container within the parent, i.e., the body */
	margin-left: auto;
	margin-right: auto;
}

#header, #content, #footer {
	width: 780px;
	margin: 10px;
}

/* design border and bg color to later share it with footer */
#header{
	border-style: solid;
	border-width: 2px;
	border-color: rgb(31,109,183);
	background-color: rgb(253,213,64);
}

#header{
	height: 130px;
}

#title {
	width:650px;
	/* move box to the left and allow content to be on it's right */
	float:left;
	margin-top:3px;
	text-align:center;
	font-size: 26px;
	color: rgb(31,109,183);
}

#logo {
	/* move box to the right and allow content to be on it;s left */
	float:right;
}

#content{
	/* reset all floating positions to none */
	clear:both;
	line-height:160%;
	height: 570px;
}

#nav{
	/* move box to the left and allow content to be on it's right */
	float:left;
	width:160px;
}

#nav ul{
	/* remove bullets */
	list-style-type: none;
	/* leave 5 pixels of padding */
	padding:5px;
}

#nav a {
	/* remove the underline in the navigation bar links */
	text-decoration:none;
}

#main{
	float:right;
	width:610px;
}

#footer{
	clear: both;
}

webpage 7: taking care of the main picture and text.

/* dummy boxs so we can see what is happening */
#footer, #my_pic, #my_text {
	border: solid;
	border-width: 1px;
	border-color: rgb(31,109,183);
}

#logopic {
	width: 120px;
	height: 120px;
	margin: 2px;
}

#pairpic {
	width: 300px;
	height: 207px;
}

body {
	font-family: Helvetica, Arial, sans-serif;
	background-color: rgb(253,213,64);
}

#container {
	border-style: solid;
	border-width: 1px;
	border-color: rgb(31,109,183);
	background-color: white;
	width: 800px;
	/* the auto centers the container within the parent, i.e., the body */
	margin-left: auto;
	margin-right: auto;
}

#header, #content, #footer {
	width: 780px;
	margin: 10px;
}

#header {
	border-style: solid;
	border-width: 2px;
	border-color: rgb(31,109,183);
	background-color: rgb(253,213,64);
}

#header {
	height: 130px;
}

#title {
	width:650px;
	float:left;
	margin-top:3px;
	text-align:center;
	font-size: 26px;
	color: rgb(31,109,183);
}

#logo {
	float:right;
}

#content{
	clear:both;
	line-height:160%;
	height: 570px;
}

#nav{
	float:left;
	width:160px;
}

#nav ul{
	/* remove bullets */
	list-style-type: none;
	/* remove space at the left */
	padding:5px;
}

#nav a {
	/* remove the underline in the navigation bar links */
	text-decoration:none;
}

#main{
	float:right;
	width:610px;
}

#main a {
	/* remove the underline in the text links */
	text-decoration:none;
}

#pairpic{
	float:left;
	padding: 30px;
}

#footer{
	clear:both;
}

webpage 8: taking care of the footer

#logopic {
	width: 120px;
	height: 120px;
	margin: 2px;
}

#pairpic {
	width: 300px;
	height: 207px;
}

body {
	font-family: Helvetica, Arial, sans-serif;
	background-color: rgb(253,213,64);
}

/* consolidate all the text-decorations for the whole page */
a {
	text-decoration:none;
	color:rgb(31,109,183);
}

#container {
	border-style: solid;
	border-width: 1px;
	border-color: rgb(31,109,183);
	background-color: white;
	width: 800px;
	margin-left: auto;
	margin-right: auto;
}

#header, #content, #footer {
	width: 780px;
	margin: 10px;
}

#header, #footer{
	border-style: solid;
	border-width: 2px;
	border-color: rgb(31,109,183);
	background-color: rgb(253,213,64);
}

#header {
	height: 130px;
}

#title {
	width:650px;
	float:left;
	margin-top:3px;
	text-align:center;
	font-size: 26px;
	color: rgb(31,109,183);
}

#logo {
	float:right;
}

#content{
	clear:both;
	line-height:160%;
	height: 480px;
}

#nav{
	float:left;
	width:160px;
}

#nav ul{
	/* remove bullets */
	list-style-type: none;
	/* remove space at the left */
	padding:5px;
}

#main{
	float:right;
	width:610px;
}

#pairpic{
	float:left;
	padding: 30px;
}

#footer{
	clear:both;
	height:32px;
	color: rgb(31,109,183);
}

#copyright{
	text-align:right;
	margin-top:5px;
	padding:5px;
}

Resources

online GIF/JPG/PNG compressor: PunyPNG
online JPG compressor: tinyJPG
online PNG compressor: tinyPNG
offline PNG compressor for mac: image Alpha
image to transparent PNG for mac: preview
image to transparent PNG for windows: paint.net
online HTML color picker: HTML color codes
online hexadecimal color picker: colorpicker.com
free images: Pixel bay
CSS properties

Code Perspectives – STEM Intros

Science, Technology, Engineering, and Math intros

Class preparation

Class work

Topics for today

Workfiles

Resources