gridbaglayout

问题 I have created some textfields from which i want to use the user-input. I have read that i should use a documentlistener, but i have some difficulty implementing it the right place i think. In the code i am trying to implement it to the textfield tf1. The input im should get is to be parsed to a double so i can do some math calculation on it. Here is my code where i try to implement it. import java.awt.ComponentOrientation; import java.awt.Container; import java.awt.Dimension; import java.awt

问题 Hi all! I'm trying to solve an -apparently- simple problem, but I cannot fix it. I'm working on a sample application with Java/Swing libraries; I have a JFrame and a JPanel. I just want to achieve the following objectives: JPanel MUST be centered inside the JFrame. JPanel MUST have ALWAYS the size that is specified with setPreferredSize() method. It MUST NOT be resized under this size. I tried by using a GridBagLayout: it's the ONLY way I can do it. See the sample below: /* file StackSample01

问题 I'm designing a GUI with 20 or so components: 10 labels, 4 text fields, 4 buttons, and 2 text areas. Using GridBagLayout seemed a great idea. But with all the instance variables required to do it by the book for each component (i.e., not reuse), a general method for adding components seemed a must. I really thought this could work: (Note: HORIZ is abbreviation for GridBagConstraints.HORIZONTAL; CENTER is abbreviation for GridBagConstraints.CENTER.) public static void addComponent(Container f,

问题 I am using a GridBagLayout to (currently) display two rows. I am aware this layout is overkill for this task, but am trying to learn how to use it. The problem is that I have added the two panels to the two separate rows and there is a huge gap around the content (see image and code below): alt text http://www.imagechicken.com/uploads/1264533379009864500.png Image background; public Table(){ super(); ImageIcon ii = new ImageIcon(this.getClass().getResource("pokerTableV2.png")); background =

问题 I am using a GridBagLayout to create a JPanel, called 'Preset' that gets replicated several times in a JFrame. Each Preset will have multiple rows (JPanels). My goal is that only one line (the first) will show up, but when the edit button is clicked they will all show. Right now, the edit button works, but there is a massive space between lines. I want it to be that when the extra lines are collapsed, each Preset will be directly above each other (no space). You can see in the following

问题 I have used a grid bag constraint, when I use the insets to add the spacing that works fine however when I use the gridx and gridy to set the position nothing happens. I just posted the entire code below, I don't know if this would help, thanks import javax.swing.*;import java.awt.BorderLayout;import java.awt.CardLayout;importjava.awt.Color;import java.awt.GridBagConstraints;import java.awt.GridBagLayout;import java.awt.Insets;import java.awt.event.ActionEvent;importjava.awt.event

问题 At the moment I've got a 9x9 grid of text fields using a GridBayLayout . Because the grid makes each text field slighter longer than it is tall (even when I set a specific height for the text field), the grid is a rectangle, rather than a square. How can I either make the entire grid a specific size, or each text field inside the grid a specific size? EDIT: I need the 9 x 9 grid of text fields to be square, rather than rectangular. 回答1: The problem is with sizing hints, methods [get/set]

问题 This question already has an answer here : getting Exception : java.lang.IllegalArgumentException: cannot add to layout: constraint must be a string (or null) (1 answer) Closed 6 years ago . I have researched this error and I cannot seem to find a solution. I am trying to create a grid of 800 JButtons with 40 columns and 20 rows. This will eventually be used to control a domino setting up robot I am making that will tip over dominoes. I have already successfully created a grid using

问题 I have a JFrame which consists mainly of a left and right side. The left has 2 components 1 above the other, and the right has 9, again 1 on top of each other. As the left has 2, I want 1 component to equal the same vertical space as 6 on the right. I am using the gridBagConstraints layout and have each JPanel positioned in the main JFrame . Everything looks OK (apart from what I was just saying). To sort this problem I use c.gridHeight = 6 on the JPanel on the left. However this then puts

问题 Ok so I am messing around with GridBagLayout to get to grips with it. I want to use it to layout JPanels in a JFrame but these individual panels will use different layout managers, GridBagLayout probably won't suit. But i have a problem. If i don't add anything to the panels, all of the proportions work out perfectly as in this example: public class RealMess extends JFrame{ private JPanel panel; public RealMess(){ initUI(); } public final void initUI(){ Dimension screensize = Toolkit