A few questions about Canvas and other Image related stuff.

I am just starting to play around with Canvas in the hopes of using it to make a little game (not an applet) in my spare time. I have gotten a ball to bounce around the screen and switch colors when it bounces without too much work. (hooray for me!).
I was wondering:
1) If you always have to repaint the whole area of the canvas, or can you repaint sections of the screen?
2) Can there only be one canvas per frame, or if you can have more, like say, one for each sprite (I tried in my own simplistic way but the second canvas overrode the first when I added it to the frame) or do you have to lay out all the sprites in one canvas every time before you paint?
3) Is Canvas the best platform for rendering my animations and doing collision detection, or are other ways of presenting the images better? By better I mean lower usage of resources, higher speed, accessibility of events that occur. (I have read in the mindprod java glossary "[Canvas] receives all the raw mousing events. Panels, in contrast, see only a few.")
4) In a call to paint which tells it to display some images which are much larger than the frame the canvas is in, is time and effort spent working on those pixels that aren't displayed or does it take about the same amount of resources as for images that fit in the frame since the same amount of picture is actually displayed?
5) Is there any convenient way to layers with canvas besides just controlling the order in which the images are painted. (I will admit I haven't searched for this information yet, because I just thought about it.)
6) Is there any other information you guys would care to bestow on me?
If any of this question is ridiculous, obvious, ignorant or any other negative adjective, then I apologize. I will continue messing around in the meantime.
Thanks
--John

Okay, well I got it to work by drawing them both to the same canvas. duh I guess.
Can you have more than one canvas in a frame? How do you set the size if so.
How do I implement the z-order? I thought of doing it manually by sending the paint method a list of objects to paint and manually managing the order of that list. Would that be an acceptable way to do it?
Should I only be trying to paint to one canvas? What I would like to do is have several canvases with transparent backgrounds so that I can draw different layers in the same frame. That way flying stuff would be painted on a different canvas than stuff on the ground, and then putting it all in a frame would tie the pictures together into a scene. Kind of like how they do distance in animation by having different layers of drawings on clear plastic that they can move at different speeds to give the illusion of depth.
Any advise? Sorry for the douba-post
Thanks
--John

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1. Depend on how intensive you use that HD for saving data on both Mac OS and XP. For standard installation on both OS X and XP, the space of 60 Gb is enough.
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(14218)

Just installed iOS6, questions about "iMessage" and other things...

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Hey Taantumus!
Here is an article that will provide some guidance on this question:
Apple ID: Changing your password
http://support.apple.com/kb/ht5624
The next time you use an Apple feature or service that uses Apple ID, you'll be asked to sign in with your new Apple ID password.
Thanks for coming to the Apple Support Communities!
Regards,
Braden

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Question about Licences and Stock Images

My school is having a tshirt design contest. In the design that they like, the tshirt uses a royalty free stock image. I took that image (of a grunge frame) off the website for 1 credit (free with a new account) and manipulated it to fit the tshirt design with a whole bunch of other elements. The problem is that the licence I got from them is not the extended one that allows resale with products. The cost of being able to do this is 100 credits, or $88. No way is the school going to do that.
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For what I think you are referring to, I often create my own "grunge" frame.
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Question about loading and using Images.

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url = this.getClass().getResource("MyImage.png");
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(note: I am using active rendering to draw these images myself and then blit it to the screen ...).

Use ImageIO rather than Toolkit--with Toolkit you need to use a MediaTracker to ensure you have your image loaded before you try to use it.
If you load an image and then do this:
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New to Arch(64), with a few questions about Xorg and more

Hello and Happy New Year everyone,
I'm a user that has just recently decided to try and switch to Linux as the main OS for all things that don't concern gaming. I've been using the "server side" of Linux at work for a couple years now, but when it comes to its desktop part I consider myself not fully competent yet. Under recommendation of a friend I decided to give Arch a shot, and I can say that it really suits my philosophy on how an OS should be like.
I have a few issues I'm currently struggling with that I couldn't seem to solve by looking on my own: as they are mostly minor and shortly described, I thought about packing them up in one single thread to avoid making too many. I've used i686 as testing grounds and am now using x86_64, but most of my problems apply to both.
Here's my hardware, for reference:
- Intel E8400 CPU (3GHz, dual core)
- Asus P5Q-E motherboard
- 2 GB DDR2 800 RAM.
- nVidia 8800GT video card with 512MB memory
- Samsung SyncMaster 713BM flat panel, connected via DVI cable
- Creative SBLive! 5.1 OEM card (dug up for the occasion since it has hardware mixing)
I'm using the latest Xorg from the repos, nvidia proprietary drivers, ALSA, Xfce4 + compiz-fusion, and SLIM as my login manager.
And here are my headaches:
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- (32/64) I'm using MPlayer with libass to watch my favourite anime, but sometimes MPlayer freezes up, forcing me to xkill it. Disabling ASS embedded subs yields error message 11, something about unsufficient resources. Disabling subs entirely prevents MPlayer from crashing. Oh, the errors only happen on specific points of certain videos, and all the videos work just fine under WinXP with MPC or VLC.
- (32/64) Why do anti-aliased fonts under Linux still look so bad, even though I installed the appropriate packages suggested in the wiki? I don't mind disabling anti-aliasing entirely and just using Verdana, but is there some trick to it besides setting sub-pixel hinting under rclick->settings->user interface?
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- [SOLVED] (32/64) The first obstacle I came across was that I couldn't set my screen refresh any higher than 60Hz when I actually wanted 75Hz: I solved this by setting the vertical refresh to 76.0-76.0 in xorg.conf. However, for some reason this setting doesn't stick on reboot: I have to log in and manually run rclick->System->NVIDIA X Server Settings for it to apply.
- [SOLVED] (64 only) The 32 version of Xorg was fine, but for some reason I'm not getting the correct keyset (Italian) under X, while everything works in vc. I think I read something about disabling a module called "keydev", but is this really the way to go?
- [SOLVED] (64 only) Although I can hear sound in just about every application, the 64 bit version of Pidgin doesn't "ring" on received messages even though the associated option is enabled.
I kindly thank you in advance for your assistance: I will provide any configuration files that might be needed to help me out
Last edited by Akaraxle (2009-01-03 21:25:43)

xisal wrote:
Take a look into /etc/hal/fdi/policy/10-keymap.fdi. This works with portuguese layout:
<snip>
The file did not exist, so I created it and changed "pt" to "it". Thanks a bunch, that fixed it!
Try SMPlayer.
Ah, I'd rather not involve Qt. Besides, isn't SMPlayer simply a frontend to Mplayer (who already has GMplayer integrated into it, IIRC)?
Mikko777 wrote:
Why would you want to use 75Hz with lcd display?
Does it make a difference?
On my monitor, from my point of view, it appears to make a difference. It's that simple
azleifel wrote:In gmplayer Preferences -> Audio -> (assuming alsa selected) -> Configure driver and change the mixer channel to something other than PCM, e.g. Master.
For all the three combos, I have "driver default" selected. The other option is "default"; I tried to manually type "Master" into the mixer channel field, but then gmplayer's windows and my Xfce taskbar started blinking, so I knew I had just "crossed streams".
Regarding NVIDIA X Server Settings, running "usr/bin/nvidia-settings --load-config-only" at login is the only way to apply the settings "automatically".
I've slapped that on my ~/.xinitrc before "exec startxfce4". Thanks in advance, going to test it now!
About the refresh and non-decorated windows issues (which *appears* to be solved after I've wiped the xfce-session cache), I've been thinking: could they somehow be related the login manager I've chosen, SLIM?
P.S. New question: is there any way to enable the ALT+num126 for ~ keyboard behaviour I'm used to under M$ environments?
Last edited by Akaraxle (2009-01-03 09:43:02)

Fundamental Question about Lightroom and saving images

I have to laugh as I get ready to pose this question because I've been working with the program for two weeks with Scott Kelby's book and with Lynda.com, and I'm still profoundly confused about what is happening to the photo. To wit: I open a camera raw file in lightroom and start playing with it, even taking snapshots at various stages along the way. If I don't export the photo to Photoshop and save it there, what becomes of these changes? Do they stay with the photo always? Do they disappear when I shut down the program? There's no SAVE button with Lightroom which just plain flummoxes me! Can anyone 'splain this to me, please? Thanks.

To clarify. Nothing happens to your originals. Lightroom stores the edits in a database (and if you wish alongside the original in a xmp sidecar file) as a set of instructions that the program uses to recreate the end product by following the instructions. These instructions are changed in the database while you're changing parameter values in Lightroom, so there is no need to save. Also, Lightroom stores a history of changes you did, so you can always go back. Both Lightroom and Adobe's camera raw plugin for photoshop can be used to follow the set if instructions. This way, you always get the highest fidelity image and you can always go back to your development choices without loosing any quality or having to dig up backups. Because of this, you can create multiple virtual copies with different development approaches without having to make a copy of the original and therefore saving you gobs and gobs of disk space. When you need a file for consumption such as a jpeg for a web page, simply export a copy, which burns in your development changes in a developed copy (just like printing a negative would have in the olden days) and trash the copy when you're done with it. You can always recreate it very quickly. This is a radically different approach than you're probably used to.

Few questions about partitioning and formatting in Windows 8

Hello,
I'm very shortly after a Windows 8 reinstall and I want to make use of this moment to finally understand partitioning and formatting in Windows 8.
Before using Windows 8, I was an XP user for 5 years and I actually never bothered myself with formatting my main system partition, that's probably why my computer ended up working like a slime for the last years. Anyway, by now I have been using Windows 8 for a year.
Three weeks ago I faced a system-related problem with my laptop (IdeaPad Y580) which prevented it from peacefully shutting down. A good friend of mine (XP user for his entire life, and now Windows 7 newbie user) told me, that I should keep all my non-system stuff on separate partition and that I should do the main system partition format from time to time to keep my PC out of trouble. It is sure that he took his knowledge from using XP, and here's my first question - does this method apply to Windows 8?
I mean as far as I know, back then, in XP, partitioning was possible only during Windows installation, and now, in Windows 8 we have a Disk Management for this, which do not require running Windows installation to create new partitions.
I'm mentioning this due to the fact that originally (I mean by factory settings) my drive has only one visible partition - C: (1TB), so I would need to use the Disk Management to take some space from C: partition and allocate it to the new D: partition.
In case I do this whole partitioning operation and create a D: partition, is it sure that formatting my system-only C: partition won't have effects on my D: partition, and all the programms and data I have here will stay on their places and work after format? (I'm worried about this because I've seen in some partitioning guide a warning not to format the main partition after the partitioning operation, because it would erase totally all data - I'm not sure if I misunderstood something or is it a mistake? EDIT: here's the link for this guide, just jump to the "Final Thoughts" section to see what I'm taking about: http://www.technorms.com/8438/windows-8-create-hard-drive-partition ).
If this whole method of keeping your system running fine doesn't apply to Windows 8, I guess I'm okay with having only one C: partition.
By the way, it doesn't matter for me if I create new partition in terms of conflicts with preinstalled Lenovo OneKey Recovery, since I had to reinstall my Windows 8 recently from non-Lenovo CD, and either way my laptop is now totally clean, without Lenovo stuff (I found Lenovo Recovery CD for Y580 on the internet, but it had non-single-language Windows 8 in it, and I needed a single-laguage one in order to have my Product Key recognised, so I just used a pure Windows 8 SL installer)

I just found out that I can't even transfer my Users folder or Program Data to other drive than the one with the system, because it would prevent me from updating my system or even from actually booting to my system. So apparently my whole topic is for nothing... I guess I should live with only one drive, and whenever my system totally crashes again I should do the backups to my external HDD. It's sad though that Windows 8 is a total opposite to user-friendly OS, to say the least.

A few questions about Memory and Power Supply for MSI 975X Platinum Powerup Edit

Bought this Motherboard: MSI 975X Platinum Powerup Edition
975X Platinum V.2(7246-020)
I have a P4 CPU HT in it with 2 512mb sticks of DDR2 memory (533mhz).
I am upgrading to a Core 2 Duo 6600 CPU which has a 1066mhz FSB
What memory speed should I purchase to achieve the fastest bus speed without overclocking???
I get confused as my current memory is 533 which I guess on a Pentium 4 with HT cuts the FSB speed in 1/2 to 266mhz.
Any recommendations?
Do I need to buy Dual Channel or can I just buy 2 sticks?
Thank you
Peter

Quote from: /dot on 07-February-07, 15:46:41
Great info again guys!
I'll stay away from OCZ (I read it's more for overclockers).
@DryHeat:
I watched your sig, great setup! I'm planning for about the same setup (MSI 975x PUE, P180, C2D, ...). But will try a Scythe Ninja for CPU cooler and use an MSI graphic card (maybe 2 cards for 4 monitors in total).
Is your setup silent or just quiet? Makes a big difference for me.
What would you change now? And what is the most noisy component?
Sorry for all the questions but I'm not an expert and by budget does not permit me from making any mistakes.
The case fans create the most noise. When they are all on "low" I an hardly hear them and have to shake the mouse to see if it's on, but on medium it sounds like a "standard" computer. Not terrible, but not quite. On high they are down-right loud.

A few questions about VoiceOver and Safari

1. Let's say I'm reading, item by item, a website that's basically a long text document. When I have interrupted reading to do something in another application or the menu, can I quickly find the position in the text where I jumped out? It would be enough to be able to jump to the paragraph in question.
2. Sometimes while browsing a website the VO cursor suddenly lands on an item which is outside the HTML content, such as the close or zoom button. Moving the VO cursor around a bit can sometimes spontaneously bring it back into the HTML content. How can VO decide to stop interacting and then restart interacting without me giving those commands? Has anyone else noticed this behavior and maybe found a way to fix it?
3. How can I tell VoiceOver to read the current web page from the VO cursor position through to the end without me having to jump item by item? I know that stopping interacting with the HTML content and then pressing VO+A will read the entire web page, but I explicitly would like to have it read from VO cursor onwards.
4. How can I go back one web page and quickly find the link I clicked? For example, a web page might contain ten links called "link 1" to "link 10" which are scattered around the page. Clicking on link 5 brings me to another page. How can I go back and quickly land on link 5?
Thanks in advance for helpful answers!

Here are a few suggestions:
1. Instead of reading using the VO-A command, try reading group by group. You can then set a hotspot (VO-Shift-number) to which you can return by hitting VO-number.
2. Try unchecking the "Mouse cursor follows VO cursor" checkbox in the Web category of VoiceOver Utility. However, this is a known bug.
3. Set a keyboard shortcut in the Keyboard and Mouse pane of System Preferences in the All applications category for the command Start Speaking Text. This is a useful thing to have as it works whether VoiceOver is on or off. While there, set a shortcut for Stop Speaking as well, as it too will come in handy. Both these commands are in the Speech submenu of the Services menu command.
Then, triple-click with the physical mouse or trackpad button. Navigate to last item using VO-Shift-end (or VO-Shift-fn-right arrow on a laptop or wireless keyboard). This is best done in DOM mode, since you do not then risk getting stuck inside a group. Make sure your end target text is not a link, so if it is, navigate to the previous non-link text. Hold down Shift and click with the physical mouse button. You should then have a block of highlighted text. Hit your Start Speaking Text shortcut and listen. To stop it, hit your Stop Speaking shortcut.
Unfortunately you can't restart at the position you stopped at with this method; you simply have to navigate to the point at which you left off, then redo the selection process.
4. Make sure that the checkbox "Press Tab to highlight each item on a webpage" in the Advanced tab of Safari's Preferences is set. If you remember the name of your link ("link 5" in your example), when you return to the page containing it, you can use the Link Chooser menu (VO-U) to find your link again. You can then use Tab to move to the next link on the page. Alternatively, you can simply use Tab all the way; each link will in turn be spoken, and if it has been clicked previously, VO will add "Visited" after the name.
HTH
Archie

A few questions about Arrays and Array Methods.

I have 2 dimentional arrays in a number of classes, and I wish to pass them about as variables, however, I can only seem to send int[], rather than int[][]. Gives me some compile errors.
Another thing. How do i get the length of an array?
I've tried: getLength(object), but it's a 2d array (int[][]), and It's having none of it. How do i get the length of a particular side?

An object like int[][] only has a single "length", and that is the length of the first dimension. This object is an array that contains arrays of int, and each of those arrays could have a different length. Your 2D array may happen to be rectangular but that isn't a requirement of Java. So you would have to write your own code to find the lengths of the sides. The first side would be theArray.length, the second side would be theArray[0].length, and like that.

Few questions about j2ee and my program

Hello
I'm new on this forum and in j2ee :)
I've to write program which should be in working similar to video on demand system but without streaming movies only database and etc.
I'm gonna write database in mysql. It will contain user and movies. I'll use the tomcat server.
Can you tell me what should i learn to do it, i mean can i use jdbc to do it or maybe i should use something diffrent, and what will i need more i mean jsp, servlets?
Sorry for such a question but i'm just beginner in j2ee and i hope you will help me :)

Hello
I'm new on this forum and in j2ee :)Welcome.
I've to write program which should be in working
similar to video on demand system but without
streaming movies only database and etc."streaming database"? Not sure what you mean.
I'm gonna write database in mysql. It will contain
user and movies. I'll use the tomcat server.Sounds ambitious for somebody who's new to Java and Java EE
Can you tell me what should i learn to do it, i mean
can i use jdbc to do it or maybe i should use
something diffrent, and what will i need more i mean
jsp, servlets?Yes, learn JDBC. And servlets and JSPs. That's quite a lot.
Sorry for such a question but i'm just beginner in
j2ee and i hope you will help me :)I don't know how this helps you. It seems to go without saying: If you want to write Java EE applications, you should know Java EE well.
%

Few questions about alsa and vlc

how to set sound via spdif in vlc ?
how to set default sound output as spdif ? (ESI Juli@)
how to disable dmix and set sampling to 192khz ?

Don't know too much, but S/PDIF would be handled by ALSA not VLC...
Check out asound.conf for default output...
Check autostart for DE/WM...
Might look into using JACK instead of ALSA...

A few questions about Canvas and other Image related stuff.

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