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Thread: Tower Defense on Java

  1. #51
    Super Moderator Norm's Avatar
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    Default Re: Tower Defense on Java

    You often need to print out objects to see what is in them.

  2. #52
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    Default Re: Tower Defense on Java

    This question probably belongs more in object-oriented programming, but I've grown attached to this thread now.

    The way I'm organizing my tower classes is that I have a superclass, called Tower, which contains all the fields that every Tower needs to have. Then, I extend that class to make the actual tower classes. So for example, I have...

    public class FlareTower extends Tower

    ...so that the FlareTower class gains all of Tower's fields and methods.

    Where my question comes is here: if I tell a method to take a Tower as an argument, for example...

    public void addTower(Tower t)

    ...or something like that, and then I use the method in a code like this...

    addTower(new FlareTower());

    ...would Java accept that? So, even though I actually input a FlareTower as the argument and the method expects a Tower, wouldn't Java accept it because FlareTower is a subclass based on the class Tower?
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  3. #53
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    Default Re: Tower Defense on Java

    Yes that describes inheritance.

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    Default Re: Tower Defense on Java

    Okay. Thank you! That is good to know before I accidentally write 20 more methods than I actually need to.
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    Default Re: Tower Defense on Java

    Alright, now I've got a new little idea. Soon, I will have my OpenGameGUI completed. One of the sections of the OpenGameGUI will be the "Levels" tab. What I want to happen is this: when the user hovers over a level's icon (for example, level 1 will have a square button that says "1" on it), I want a JPanel to appear next to the mouse displaying information on the level (so, if it's locked, say so; if the user has beat it, display his/her best score, etc.).

    I know I can use a MouseListener to display the panel tooltips and a MouseMotionListener to move the panel tooltips with the user's mouse, but how can I make the panels that will act as tooltips appear on top of the other Components of the GUI? I've heard of GlassPanes and Z-alignment, but I'd like some advice about which way is the best to go, and may some good documentation to look at. Thanks!
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    Default Re: Tower Defense on Java

    Hmm... A random curiosity struck me. Is there any way to create a gradient fill for components, instead of just using...

    <Component>.setBackground(Color c);

    ...? Or perhaps a special type of color that is actually a gradient? Any help would be appreciated!
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    Default Re: Tower Defense on Java

    I've never seen anything that simple.

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    Default Re: Tower Defense on Java

    Quote Originally Posted by snowguy13 View Post
    Hmm... A random curiosity struck me. Is there any way to create a gradient fill for components, instead of just using...

    <Component>.setBackground(Color c);

    ...? Or perhaps a special type of color that is actually a gradient? Any help would be appreciated!
    You'll want something more like:

    LinearGradientPaint gradient = new LinearGradientPaint(start, end, fractions, colors);	
    g2d.setPaint(gradient);		
    g2d.fillRect(0, 0, getWidth(), getHeight());

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    Default Re: Tower Defense on Java

    You might consider posting separate questions in separate threads.
    Okay. I'll do that in the future, after this is solved (pointless to start a new thread halfway through a solution).

    g2d.setPaint() is telling the g2d (Graphics2D Class, right? or is g2d an instance?) to use the specified gradient to paint Components, and g2d.fillRect() fills the specified area of a... JFrame? Component? How can I apply this to a JLabel?

    Thanks for your help!
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  11. #60
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    Default Re: Tower Defense on Java

    Yeah, g2d is an instance of Graphics2D. You can get one by overriding paintComponent and casting the Graphics Object, which is actually a Graphics2D Object. And it fills whatever you want, you just have to override paintComponent.
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    Default Re: Tower Defense on Java

    I'd say do the second choice, but then from within that super class you make multiple classes in which you detail what each of the objects are, if your a beginner, it might take a while to get to write that code

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