ean 13 barcode generator java The DoSlideshow() Subfunction in Java

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The DoSlideshow() Subfunction
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Since both images are showing the same picture, it is safe to set the first one to be fully visible and the second one to invisible, like this:
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Opacity('SS_IMG1', 100) Opacity('SS_IMG2', 0)
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Having made this swap, the index variable is incremented to point to the next picture in the slide show and, if it becomes larger than the number of images in the images array, it is reset to 0 (using the % operator) to start again at the beginning, as follows:
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index = ++index % len
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Next, it s time to load in the next picture listed in the images array into the second image, because the first image is the one currently being displayed, and the second has been made invisible ready to do this:
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O('SS_IMG2')src = images[index]
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I will explain the following statement shortly, but here it is for reference:
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var next = InsVars("O('SS_IMG1')src = '#1'", images[(index + 1) % len])
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FadeBetween() plug-in to fade between the two, like this:
FadeBetween('SS_IMG1', 'SS_IMG2', msecs, next)
Now that each image holds a different picture, it s a simple matter to call the
This makes the second image the visible one and the first one invisible At this point, the image states are the same as at the start of the subfunction The value of the next argument in the FadeBetween() call is a string containing a callback function, which is mostly used by chains to link them together However, in this case it is just passing a statement to be executed once the plug-in completes its work The contents of next, which I previously glossed over, creates a statement that will load the next picture in the slide show into the first image once the fade between the two images is finished and the first image is now invisible (and available for use in this way) This is done to preload the picture so that it is cached in the browser and, next time round the loop, when the picture is loaded into image 2, it will be fetched from the cache without any delays while it is downloaded from the server This means program execution is ready to go round the loop again However, the next interrupt call to the subfunction is only set up if the SS_Stop property of id is false, because if it is true then a call has been made requesting the slide show to stop:
if (!O(id)SS_Stop) setTimeout(DoSlideshow, msecs + wait)
Otherwise, if the slide show is stopped, the SS_Flag property of id is set to false to indicate this:
else O(id)SS_Flag = false
How To Use It
To use this plug-in, prepare an empty div or span and pass it to the plug-in along with an array containing the URLs of the images for the show and two timers: the first for how long each fade transition should take and the second for the length of pause between changing images, both in milliseconds Here s an example that combines this plug-in with the previous one, Lightbox(), to create a slide show in a light box:
<button id='link' type='button'>Click Me</button> <div id='show'></div> <script> windowonload = function() { Resize('show', 320, 240) Hide('show') photos = Array('photo1jpg', 'photo2jpg', 'photo3jpg', 'photo4jpg', 'photo5jpg')
10:
a u d i o a n d Vi s u a l e ff e c t s
O('link')onclick = function() { Slideshow('show', photos, 500, 2000) Lightbox('show', '#888888', '000000', 80, 500, 1) } } </script>
In the HTML section, a button is created that will call the anonymous, inline function when clicked, while underneath it there s an empty div In the <script> section, the div is resized (with a call to Resize()) to the dimensions required so that the Slideshow() function can center it correctly without these dimensions, if the contents of the div is not ready when the Center() call is made, the object might appear off center The div is also hidden with a call to Hide() because now that it has dimensions it will push any content below it out of the way Then the array photos is populated with the URLs of five photos, and the function calls both Slideshow() and Lightbox() to merge the two plug-ins together Because the Lightbox() plug-in dismisses its contents when you click it, the slide show will not stop, even though it isn t visible If you click the button again, the Slideshow() plug-in will realize that it is still running and simply continue the slide show If you want to turn the slide show off, you need to set the SS_Stop property of show to 1 or true, and the next time a slide change is due it will stop:
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