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Java Making objects move while buttons held


Java Making objects move while buttons held

By : zcaad9
Date : November 29 2020, 01:01 AM
it helps some times There are a number of important considerations that you need to take into consideration.
Buttons aren't designed to work this way. They are designed to trigger and action event when they are clicked (pressed and released), so you can't use the normal action API. Lucky for us, there are other ways to determine the state of buttons. This example uses a ChangeListener on the ButtonModel and takes actions based on the state of the model. Components are normally under the control of layout managers. This means in order to be able to move the component, we need to turn this off (also known as null or absolute layouts). Normally, I would discourage this, but this is the only way this will work. However. Once you remove the layout manager, you become responsible for ensuring the component(s) are properly positioned and sized...this is not work to be taken lightly. More context of what you're trying to achieve would produce better answers While the button is "pressed", we need a way to determine which way to move the component. This example uses a simple enum to determine which direction to move the component. You could just as easily use a x/yDelta and modify the components x/y position directly. Either should work fine. Swing is a single thread environment. That is, all interactions and modifications to the UI are expected to be executed within the context of the Event Dispatching Thread. But any actions that block the EDT will prevent the UI from begin update or any new events from begin processed. This means, in order to move the component, we can't simply use a while-loop, because it will never end (no new events will be processed). Instead, this example uses a javax.swing.Timer, which waits in the background and raises an ActionEvent on each tick within the context of the EDT. The a tick occurs, we modify the location of the panel
code :


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Java - Are objects in a list held by value or reference?

Java - Are objects in a list held by value or reference?


By : Muklis
Date : March 29 2020, 07:55 AM
Hope that helps Simple question, does a list in Java hold objects by value or reference? If I place an object in a list and later on change one of its values, is the one in the list going to have the updated value? ,
does a list in Java hold objects by value or reference?
jQuery Two buttons making a picture move from left to right

jQuery Two buttons making a picture move from left to right


By : MuadDib
Date : March 29 2020, 07:55 AM
wish help you to fix your issue You are currently just settings its position to 50px, what you want to do is add 50px from its current position:
code :
$('#left').click(function(){
    $('#img').animate({
        left:'+=50px'
    });
});
How to set XtraForm title text in the middle without making buttons move?

How to set XtraForm title text in the middle without making buttons move?


By : user2527993
Date : March 29 2020, 07:55 AM
Hope that helps Try the following approach (based on XtraForm - How to center-align a header caption text example). It works to me as far as the solution provided by DevExpress team but does not contains Buttons.CalcButtons method call that can theoretically affect form's buttons position:
code :
public partial class Form1 : XtraForm {
    static Form1() {
        SkinManager.EnableFormSkins();
    }
    public Form1() {
        InitializeComponent();
    }
    protected override FormPainter CreateFormBorderPainter() {
        return new CustomFormPainter(this, LookAndFeel);
    }
}
public class CustomFormPainter : FormPainter {
    public CustomFormPainter(Control owner, DevExpress.Skins.ISkinProvider provider)
        : base(owner, provider) {
    }
    protected override void DrawText(DevExpress.Utils.Drawing.GraphicsCache cache) {
        string text = Text;
        if(text == null || text.Length == 0 || TextBounds.IsEmpty) return;
        using(AppearanceObject appearance = new AppearanceObject(GetDefaultAppearance())) {
            appearance.TextOptions.Trimming = Trimming.EllipsisCharacter;
            appearance.TextOptions.HAlignment = HorzAlignment.Center;
            if(AllowHtmlDraw) {
                DrawHtmlText(cache, appearance);
                return;
            }
            Rectangle r = RectangleHelper.GetCenterBounds(TextBounds, new Size(TextBounds.Width, CalcTextHeight(cache.Graphics, appearance)));
            DrawTextShadow(cache, appearance, r);
            cache.DrawString(text, appearance.Font, appearance.GetForeBrush(cache), r, appearance.GetStringFormat());
        }
    }
}
Are all java objects held in memory until destroyed somehow?

Are all java objects held in memory until destroyed somehow?


By : Black_Prime
Date : March 29 2020, 07:55 AM
it fixes the issue I have an Android App that uses a database. The db class I created will iterate the database and use a seperate class to ?"HOLD"? each row. , You create multiple Poster objects (instances of Poster class)
code :
Poster poster = new Poster( ... );
posterList.add(poster);
return posterList;
Making buttons automatically move around the screen

Making buttons automatically move around the screen


By : nic3108
Date : March 29 2020, 07:55 AM
Hope this helps Recently, I've been playing with animations and attempted the similar. Here is the class. It basically bounces around the parent view (which you can alter the math to go further)
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