Silverlight has to be one of the easiest things I have ever worked with.
Last year, I was asked to put together a logo and site design for a new type of technology conference: CodeMash. (As a sidenote, registration just opened for the 2008 Codemash. For the price, it is by far one of the best conferences you’ll attend this year.)
I designed the logo in Adobe Illustrator CS2, knowing that it would be used for print materials, the website, t-shirts, etc. It only made sense to create it using vector graphics. Little did I know at the time, it would also be the way that I turned that logo into an animation for CodeMash v220.127.116.11.
This post is meant to be a tutorial on what it really takes to create a simple Silverlight animation.
First, you are going to need to install some software (I am including links the newest stuff, but you should be able to do this with v1 of expression, and no Silverlight):
* Silverlight 1.1. Alpha
* Microsoft Expression Blend 2 September Preview (This version is good through June 1, 2008)
Once you’ve got those installed, you’re also going to need some base XAML (eXtensible Application Markup Language) to work with. Download the CodeMash logo here. All this markup is at this point is the design. Just save this .txt file down, and we’ll use it momentarily.
OK, now on to the tutorial:
1) Open Expression Blend 2, and create a new project.
2) Choose Silverlight Application (.NET)
3) By default, Page.xaml will be open. Choose the XAML view.
4) Cut and paste the contents of the logo.xaml file you downloaded earlier IN BETWEEN the <canvas> and </canvas> tags that are currently provided to you.
5) Flip back to the Design view, and you should now see the CodeMash logo on your canvas.
6) You’re probably also noticing that the white canvas we started with isn’t really big enough for our design. We should probably make that bigger as well. It needs to be 650px x 777px. We’ve got two options with this one. This first is just to edit the XAML directly. Take a look at that initial <canvas> tag we started with. It’s got width and height properties, so we can just change the values. The second option is much better for those of you that don’t want to edit your XAML directly. Click on the element named “Page” (that’s our primary canvas) in the “Objects and Timeline” panel. Then, click on “Properties” in the top right. This shows you, much like Visual Studio, the Properties that are available to the element you’ve selected. Finally, you’ll see the width and height properties in the list. You can type the values there, or you can use the innovative “slider” interface to get to the value you desire.
7) Take a look at the Objects and Timeline panel. You should see a well organized list of all of the elements that make up the logo. Gears, glasses, etc. Each one of these elements is defined in the XAML we imported. We are primarily going to be working in this panel the rest of the way.
8) Press F7 on your keyboard. This will take us into the “Animation Workspace.” It’s not any different from the “Design Workspace” (F6) we were in, except that the panels have been moved.
9) Expand the elements in the Objects and Timeline panel, and look for:
Page > Orange_Gear > Orange_Gear_Teeth. Click on that element once, highlighting it.
10) Under the “Objects and Timeline” panel header, there is a drop-down list with “(No Storyboard open)” as the selected value. Click the “>” button just to the right of that list. This will bring up the storyboard search dialog. Click the “+” symbol to create a new storyboard. Name your timeline/storyboard (it’s named Timeline1 by default), and click “OK.” Since we’re gonna be animating the gears, I named my timeline “GearSpin.”
11) You will now see that a timeline has appeared next to our list of elements. Each number (1, 2, 3, etc.) represents one second of time. We will use these times to “schedule” our animations. For those of you unfamiliar with animation software, we are going to be creating keyframes that will do most of the animation work for us. Basically, we define the states we want our elements to be in at certain keyframes, and the software figures out how to get it from Point A to Point B without any other instruction. Please also notice that your canvas now has a red line around it, and in the top right corner, now says, “Timeline recording is on.” This means that all of our future actions will be recorded and animated. When we want to make a change that we don’t want to be part of the animation, we need to make sure to turn recording off.
12) Make sure that the element “Orange_Gear_Teeth” is still selected. Just above where ZERO seconds is on the timeline, there is an icon with a green “+” in it. Click it. By clicking this, we are creating a keyframe at 0:00 of our animation. This means that it will start as soon as the application does. We could move this to 1 second if we wanted a 1 second delay before our animation began, but for this demo, we want it to start at the beginning.
13) Next, we need to create a new place for these gears to be. So let’s say we want to have them rotate 90 degrees in 1 second. Drag the yellow timeline indicator to one second. Click the “+” to set another Keyframe at 1 second. In the “Properties” tab in the top right of Expression Blend, find the “Transform” section, and click the “Rotate” tab inside there. You will see that the current Angle is set to 0 degrees. Let’s change that to 90 degrees. You can either click and drag the box to the right, until it says 90, or you can just click on the box, which will allow you to type 90.
14) Whoa! You may have noticed that your gear teeth have derailed from their hub. That’s because we didn’t define the center of those objects appropriately. Press CTRL + z on your keyboard, to undo the change you just made. Also, because we don’t want to animate moving the center of these objects, we need to turn off recording. You can do this by clicking on the red circle in the top right corner of the canvas.
15) Because you have highlighted the “Gear_Orange_Teeth” layer, you should see a blue box surrounding those elements, but probably a bit bigger than just those elements need. You should also see a white dot that indicates where the center of that entire box is. We need to move that. Click on it and drag it to the blue center of the orange gear. That’s the point we want our teeth to rotate around, right? To be more exact, I recommend zooming in and placing your center point that way.
16) Once you’re confident in your center point, turn recording back on, modify that angle again, changing it to 90 degrees. Now you can click the “PLAY” button (it’s right above the timeline) to see your orange gear spin.
17) We’ve got one other thing to take care of to make this look great. We don’t want to have the gears stop after 1 second. We want them to continue spinning forever. This is a simple change. We had selected Orange_Gear_Teeth from the timeline earlier, and now we need to expand it. Inside it, you will see a RenderTransform element. This was created when we changed that rotation angle. Expand it all the way, and you will see an “Angle” element. Right-clicking on this will give you the option to “Edit Repeat Count.” We can set this to 1, 2, 100, etc. There’s also an “infinity” option. Choose that, and our gears will spin forever.
18) Now, we need to animate the other two gears. We are going to follow the same steps for the Blue and Green Gears. So take steps 9-17, rinse, lather, repeat. The only difference for the other two gears is that they rotate in the other direction. So instead of 90 degrees, they will be set to -90 degrees.
19) You should now have a working Silverlight application, that has the gears spinning. Press F5 to run your project!