Print

Please login or register.
1 Hour 1 Day 1 Week 1 Month Forever
Login with username, password and session length

[Mego]

Haha, I'm trying to learn C++ now the same way I learned how to mod DF: using a shitload of online resources and referencing the code of pre-existing software made by those more skilled than me.

Except instead of DF wiki it's google and various C++ tutorials and instead of Deon's Genesis Mod it's SLASH'EM.

The best way to learn something is to keep trying until you stop failing.

Unfortunately, with programming, that point doesn't ever really come.

[kaijyuu]

Haha, I'm trying to learn C++ now the same way I learned how to mod DF: using a shitload of online resources and referencing the code of pre-existing software made by those more skilled than me.

Except instead of DF wiki it's google and various C++ tutorials and instead of Deon's Genesis Mod it's SLASH'EM.

Pretty much how I learned!

I like to call it: Bashing one's head against the keyboard until it works.

[Skyrunner]

I thought that's how everyone learned C++. :s

[Valid_Dark]

I thought that's how everyone learned C++. :s

Thats not how I learned C++

I sure do love my C++ book, but it takes FOREVER to get through, just because it's super in depth,
in an online book review, I read something along the lines of
"If you were to compare programming concepts to food, and say you needed an egg for something, if you use an online resource, it will tell you, this is an egg, this is how you use it, these are other types of eggs, etc. and that may be very good and well because thats all you really need, but this book tells you what eggs are, where they come from, the different colors and textures they can have, all the animals that lay eggs, all the foods that can be made with eggs, etc."

Really it's a very boring and slow book, and many of the things it says I really figured out just by reading the previous parts of the book, like, it taught arrays, and then objects, and then how to make an array of objects, and how to make an object with arrays in it, I would have figured you can put arrays in objects and that you can have an array of objects, but the book always has a thing or two that here helpful, that I wouldn't have known if I had figured I knew those parts already and had skipped them,

Like how to use constructors with parameters for objects in an array.

[Skyrunner]

Well, if you have had at least one error that isn't simple, you're learning C++ by bashing your head on the keyboard until it works, too. :3

[Valid_Dark]

yeah, then I guess you're right, lol

In other news

https://en.wikipedia.org/wiki/Piet_%28programming_language%29

this..

[Skyrunner]

There are many esoteric programming languages in the world ... xD

I liked the "recipe" style one.

[LoSboccacc]

I've a problem with custom graphics on button in java.

I've a jbutton, for which I use graphics.drawImage to perform compositing between different image states. I fought hard and won against blitting and transparencies, which doesn't work so nicely when you have multiple button overlapping each with its own transparent custom drawing, but now I'm stuck with another problem:

Spoiler (click to show/hide)

all those buttons are in a scrollable viewport, but the custom image doesn't obey the component clipping, so the image gets drawn OVER the scrollbars. (and over the quit panel, sometimes)

now, does anyone know how to set the z-order of g2d.drawImage OR how to get the clip rectangle of the viewport a component is in? should work either way.

edit: nevermind I was messing with bounds in a superclass.

[Mego]

I've a problem with custom graphics on button in java.

I've a jbutton, for which I use graphics.drawImage to perform compositing between different image states. I fought hard and won against blitting and transparencies, which doesn't work so nicely when you have multiple button overlapping each with its own transparent custom drawing, but now I'm stuck with another problem:

Spoiler (click to show/hide)

all those buttons are in a scrollable viewport, but the custom image doesn't obey the component clipping, so the image gets drawn OVER the scrollbars. (and over the quit panel, sometimes)

now, does anyone know how to set the z-order of g2d.drawImage OR how to get the clip rectangle of the viewport a component is in? should work either way.

edit: nevermind I was messing with bounds in a superclass.

Funny, I'm working with pretty much the same stuff for a school project. Tips?

[LoSboccacc]

Funny, I'm working with pretty much the same stuff for a school project. Tips?

I've a ton, but you should properly better define where you need hints.

I can point you toward this
http://www.muntjak.de/hans/java/tinylaf/index.html

which is a java look&feel with an integrated editor that can make any generic boring java application in a serious business program

Spoiler (click to show/hide)

then, if you need that gameish touch so that button looks like embedded into the panel looking like active elements it is, well, more complicate because you can't trust mouse status, but you can do with proper listeners:

Spoiler (click to show/hide)

Code: [Select]

/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */
import java.awt.Color;
import java.awt.Graphics;
import java.awt.Image;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import java.awt.image.BufferedImage;
import java.awt.image.ImageObserver;
import java.awt.image.ImageProducer;
import javax.swing.ImageIcon;
import javax.swing.JButton;

public class Widget extends JButton implements MouseListener{
    private Image normalStatusImage;
/**
* put transparencies, those will be composed over the normal status!
*/
    private static ImageIcon rolloverImage;
    private static ImageIcon pressedImage;
   
   
    public Widget() {
       
       
       normalStatusImage = new ImageIcon("data/someImage");
        b.setRolloverEnabled(true);
        rollover = new ImageIcon("data/anImageLikeABorder.png");
        pressed = new ImageIcon("data/anImageToShowPressedStatus.png");
        b.setOpaque(false);
        b.addMouseListener(b);
       
       
    }

    private boolean underMouse;
    private boolean mousePressed;
    @Override
    public void paint(Graphics grphcs) {
        System.out.println("custom drawing ftw");
        int h = this.getBounds().height;
        int w = this.getBounds().width;
        int x = 0;
        int y = 0;
       
       
        grphcs.drawImage(normalStatusImage, x, y, h, w, null);
       
               
        if (underMouse ){
            grphcs.drawImage(rollover.getImage(), x, y, h, w, this);
        }
        if (mousePressed){
            grphcs.drawImage(pressed.getImage(), x, y, h, w, this);
           
        }
        super.paint(grphcs);
           
    }

    @Override
    public void mouseClicked(MouseEvent me) {
        this.mousePressed=true;
    }

    @Override
    public void mousePressed(MouseEvent me) {
        this.mousePressed = true;
    }

    @Override
    public void mouseReleased(MouseEvent me) {
        this.mousePressed= false;
    }

    @Override
    public void mouseEntered(MouseEvent me) {
        this.underMouse =true;
    }

    @Override
    public void mouseExited(MouseEvent me) {
        this.underMouse=false;
    }
   
   
   
   
}




note that I've manually edited out useless parts from the widget class so it may not compile as such, but it is quite close.

if you have some question, ask freely.

edit: to clarify - here are the rollover and pressed image I use

Spoiler (click to show/hide)

they compose around the button image without blocking it from view

[Valid_Dark]

in c++  is  a = b = c = d = e = f = 5;  valid, and would it initialize 'a' through 'f' to 5?

also, making an array of pointers,
I need an array of 12 SDL_Surface pointers,  so would I just do SDL_Surface*[12];  or what?

[Nadaka]

in c++  is  a = b = c = d = e = f = 5;  valid, and would it initialize 'a' through 'f' to 5?

98% positive that is correct on both counts. But my c++ is rusty.

[kaijyuu]

Yes, that would initialize them all to 5 (starting with f, though the order doesn't matter in this case).

I do that sort of thing sometimes for constructors and the like.

also, making an array of pointers,
I need an array of 12 SDL_Surface pointers,  so would I just do SDL_Surface*[12];  or what?

Two ways to do that (depending if you want a variable array size or a set one).

SDL_Surface VariableName[12]; //empty uninitialized array of size 12. Size is hardcoded.
SDL_Surface* VariableName = new SDL_Surface[12]; //empty uninitialized array of size 12. Size can be set with a variable and is not hardcoded. Note you have to delete this one at the end or you'll get leaks.

[Valid_Dark]

This is driving me nuts,
so i'm programming this thing, right?  and about a month or 2, I wanted to program a different part of it, even though it wasn't ready for it, so I programmed that other part independent of it, as it's own program, just to figure out the mechanics for how it works, and now i'm having a retardedly hard time putting it together.

now I understand why it's important to leave notes in your code.

I think I just need to have a cigarette and get a fresh start on this.


well there are some notes, but they are the most unhelpful notes you could ever imagine,
there are only notes on things that are super obvious as to what they do -__-"

[dreadmullet]

Yes, that would initialize them all to 5 (starting with f, though the order doesn't matter in this case).

I do that sort of thing sometimes for constructors and the like.

also, making an array of pointers,
I need an array of 12 SDL_Surface pointers,  so would I just do SDL_Surface*[12];  or what?

Two ways to do that (depending if you want a variable array size or a set one).

SDL_Surface VariableName[12]; //empty uninitialized array of size 12. Size is hardcoded.
SDL_Surface* VariableName = new SDL_Surface[12]; //empty uninitialized array of size 12. Size can be set with a variable and is not hardcoded. Note you have to delete this one at the end or you'll get leaks.

Valid_Dark was asking how to create an array of pointers, not the SDL_Surfaces themselves:

Code: [Select]

SDL_Surface* VariableName[12];
SDL_Surface** VariableName = new SDL_Surface*[12];