如何生成从笛卡尔坐标的GridBagLayout(X,Y)?
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24-09-2019 - |
题
我的问题涉及到以前的帖子 如何填写颜色在网格框随机
我怎样才能获得直角坐标通过各自颜色在GridBagLayout的填充的箱子的(X,Y)。例如,如果面板的尺寸为300×300,以及行和列设置为5×5,有没有什么办法,我们就知道了协调,不仅看在列和行?
http://www.freeimagehosting.net/image.php?a6ec309bd0.jpg
EDITED:完整代码
import java.awt.Color;
import java.awt.Component;
import java.awt.Dimension;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.Insets;
import java.awt.Label;
import java.awt.Rectangle;
import javax.swing.JFrame;
import javax.swing.JPanel;
@SuppressWarnings("serial")
public class Grid extends JPanel{
public static void main(String[] args){
JFrame jf=new JFrame();
jf.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
jf.add(new Grid());
jf.pack();
jf.setVisible(true);
}
public Grid (){
setPreferredSize(new Dimension(300,300));
setBackground(Color.BLACK);
final Color BACKGROUND = Color.WHITE;
final Color[] colors = new Color[]
{Color.BLACK, Color.CYAN, Color.MAGENTA, Color.YELLOW,
Color.GREEN, Color.RED, Color.ORANGE, Color.BLUE, Color.PINK, Color.LIGHT_GRAY};
final int ROWS = 5;
final int COLS = 5;
setLayout(new GridBagLayout());
GridBagConstraints gc = new GridBagConstraints();
gc.weightx = 1d;
gc.weighty = 1d;
gc.insets = new Insets(0, 0, 1, 1);
gc.fill = GridBagConstraints.BOTH;
// fill the whole panel with labels
Label[][] label = new Label[ROWS][COLS];
for( int r=0 ; r<ROWS ; r++) {
for( int c=0 ; c<COLS ; c++) {
Label lbl = new Label();
lbl.setBackground(BACKGROUND);
gc.gridx = r;
gc.gridy = c;
add(lbl, gc); //add(component, constraintObj);
label[r][c] = lbl;
}
}
// now find random fields for the colors defined in BACKGROUND
for(Color col : colors) {
int r, c;
do { // make sure to find unique fields
r = (int)Math.floor(Math.random() * ROWS);
c = (int)Math.floor(Math.random() * COLS);
} while(!label[r][c].getBackground().equals(BACKGROUND));
label[r][c].setBackground(col);
}// end
int i=0;
Component[] components = getComponents();
for (Component component : components) {
i++;
Color color = component.getBackground();
Rectangle bounds = component.getBounds();
System.out.println("box "+i +",coordinate= "+bounds +", Color= "+color);
}
}
}
输出: 我无法得到的坐标,所有坐标似乎是相同的, java.awt.Rectangle中[X = 0,Y = 0,宽度= 0,高度= 0]
解决方案
如何:
GridBagLayout lay = new GridBagLayout();
setLayout(lay);
// Add components
add(comp1, constraints);
add(comp2, constraints);
//
GridBagConstraints c = lay.getConstraints(comp1);
System.out.println(c.gridx + ", " + c.gridy);
在你的情况,试试这个代替了System.out.println:
GridBagConstraints gbc = ((GridBagLayout) getLayout()).getConstraints(component);
System.out.println("box " + i + ",coordinate=" + gbc.gridx + " , " + gbc.gridy);
这是对我的作品...
如果您需要在屏幕组件的位置,确保框架是可见光第一。例如,当我用这个,而不是你main()
,它打印位置正确:
public static void main(String[] args) {
final JFrame jf = new JFrame();
jf.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
final Grid grid = new Grid();
jf.add(grid);
jf.pack();
jf.addWindowListener(new WindowAdapter() {
public void windowActivated(WindowEvent e) {
int i = 0;
Component[] components = grid.getComponents();
for (Component component : components) {
i++;
Color color = component.getBackground();
Rectangle bounds = component.getBounds();
System.out.println("box " + i + ",coordinate= " + bounds
+ ", Color= " + color);
}
}
});
jf.setVisible(true);
}
它可以在所有的情况下,不仅在WindowListener
。只要确保框架是可见已经...
其他提示
可以从加入到细胞组分得到的位置
Rectangle bounds = component.getBounds();
还是要经过整个网格你可以使用这样的:
Component[] components = panel.getComponents();
for (Component component : components) {
Color color = component.getBackground();
Rectangle bounds = component.getBounds();
}
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