barcode visual basic 6: Working with Images in Java

Creation QR Code in Java 6: Working with Images

6: Working with Images
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<img src="ldanielsgif" alt="Laura Daniels, CTO" /><br /> <p>Laura Daniels, CTO</p> </div>
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Then you would add the declaration for that thumbnail class to your style sheet:
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Adding this property ensures my images have a little breathing room (15 pixels) in between each other
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thumbnail {float: left; padding: 15px;}
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The float: left code tells the browser to put the first image next to the left margin of the page Then, each subsequent image with the float: left style follows suit and sits in a row next to the first image, until it reaches the right edge of the browser If the browser is open wide enough for all the floated images to fit in a single row, they will do so If the user has the browser window open only enough for two images to fit in a row, then the remaining images will begin a new row beneath the first row (starting again near the left margin) This is the true meaning of a liquid layout in web design, because the page is able to grow or shrink according to the browser window size Compare Figures 6-7 and 6-8 to see an example of this floating principle in action
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Figure 6-7
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A very simple style sheet allows these three photos to float next to each other on the page
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Figure 6-8
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That same style sheet lets the browser move the images according to the width of the browser window
Padding and Margins
The section Quotation Blocks and Text Boxes in 4 discusses how to use the padding and margin properties to add blank space within and around an element s borders Those same properties margin and padding can also be applied to images to specify the space around an image on one, two, three, or all four sides For example, suppose you wanted to add a small block of space on the left side of an image, but you didn t want to add any space on the right side because that side fits perfectly with another image If you added the margin-left property to your style sheet or within your img tag, you could add space only on the left side
<img src="photojpg" width="200" height="200" style="margin-left: 25px;" />
Centering
By this point there s probably a big question still remaining about images and alignment how to center ! While there isn t a center property for images, there is a trick you can use to center an image on the page or within a section The key lies in changing the way we refer to centering an element in reality what we re doing is making its left and right margins exactly equal
6: Working with Images
First, we must tell the browser to display the image as a block element In CSS, block elements will automatically fill the entire available space So if an image becomes a block element, its margins will grow until they reach the edges of the browser window Next, if you tell the browser to make both the left and right margins the same, you will, in effect, center the image The following is an example of the code you might use to center an image First, the style sheet:
This tells the browser to only apply the style to the centered class when it is used within an img tag
imgcentered {display: block; margin-left: auto; margin-right: auto;}
Then, add the name of the class (in this case it s centered ) to the img tag Figure 6-9 shows the final result in the browser No matter how wide (or narrow) the browser window is opened, the image remains centered horizontally
<img src="art-turtlegif" alt="Drawing of a Turtle" class="centered" />
Figure 6-9 Although there isn t a center property in CSS, there are other ways to center images with style sheets
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Try This 6-2
Change Image Characteristics
Returning to the indexhtml page, let s vary the characteristics of the image you added in the previous project In addition, we ll add another image at the top of the page Goals for this project include
Specifying the height and width for an image Providing alternative text and a title for an image Linking an image to another web page Turning off the border for a linked image Aligning an image with the text around it Adding some buffer space around an image
1 Open your text or HTML editor and load the tripshtml page saved from Try This 6-1 2 Add the height and width attributes to the hiking image 3 Add alternative text and a title to the image 4 Add 10 pixels of buffer space around the image 5 Link the image to hikinghtml and turn off the image s border 6 Add another photo (raftingjpg) to the Rafting Trips section, making sure to specify the
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