Java 组件运行时图形
因此，我的程序中有一个keyListener。一旦激活，它就会在屏幕上绘制另一个组件 发生的事情是，最新的组件在屏幕上的一个不应该或错误大小的地方被绘制（仅仅一瞬间），然后捕捉到它指定的位置和大小，一切看起来都很棒 在屏幕上绘制组件之前，是否有方法指示我的程序计算组件的位置和大小，以避免闪烁Java 组件运行时图形,java,swing,paint,jcomponent,Java,Swing,Paint,Jcomponent,因此，我的程序中有一个keyListener。一旦激活，它就会在屏幕上绘制另一个组件 发生的事情是，最新的组件在屏幕上的一个不应该或错误大小的地方被绘制（仅仅一瞬间），然后捕捉到它指定的位置和大小，一切看起来都很棒 在屏幕上绘制组件之前，是否有方法指示我的程序计算组件的位置和大小，以避免闪烁 package core; import java.awt.BorderLayout; import java.awt.Color; import java.awt.Component; import j
package core;
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Component;
import java.awt.Dimension;
import java.awt.Font;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.KeyEvent;
import java.awt.event.InputEvent;
import java.awt.event.KeyListener;
import java.awt.event.WindowEvent;
import java.awt.event.WindowListener;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.sql.Array;
import java.util.ArrayList;
import java.util.Locale;
import java.util.Properties;
import java.util.ResourceBundle;
import javax.swing.BorderFactory;
import javax.swing.Box;
import javax.swing.BoxLayout;
import javax.swing.ButtonGroup;
import javax.swing.JButton;
import javax.swing.JDialog;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JMenu;
import javax.swing.JMenuBar;
import javax.swing.JMenuItem;
import javax.swing.JPanel;
import javax.swing.JRadioButton;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
import javax.swing.KeyStroke;
import javax.swing.border.Border;
import javax.swing.text.AbstractDocument;
import javax.swing.text.AttributeSet;
import javax.swing.text.BadLocationException;
import javax.swing.text.DocumentFilter;
@SuppressWarnings("serial")
class DefaultFont extends Font
{
public DefaultFont()
{
super("Arial", PLAIN, 20);
}
}
@SuppressWarnings("serial")
class Page extends JPanel
{
public JPanel largePage;
public int content;
public Page(JPanel panel, int index)
{
largePage = new JPanel();
largePage.setLayout(new BoxLayout(largePage, BoxLayout.Y_AXIS));
largePage.setMaximumSize(new Dimension(794, 1123));
largePage.setPreferredSize(new Dimension(794, 1123));
largePage.setAlignmentX(Component.CENTER_ALIGNMENT);
largePage.setBackground(Color.WHITE);
largePage.add(new Box.Filler(new Dimension(0, 96), new Dimension(0, 96), new Dimension(0, 96)));
setMaximumSize(new Dimension(556, 931));
setBackground(Color.LIGHT_GRAY);
setLayout(new BoxLayout(this, BoxLayout.Y_AXIS));
add(new Box.Filler(new Dimension(556, 0), new Dimension(556, 931), new Dimension(556, 931)));
largePage.add(this);
largePage.add(new Box.Filler(new Dimension(0, 96), new Dimension(0, 96), new Dimension(0, 96)));
panel.add(largePage, index);
panel.add(new Box.Filler(new Dimension(0, 40), new Dimension(0, 40), new Dimension(0, 40)));
content = 0;
Main.pages.add(this);
}
}
@SuppressWarnings("serial")
class Heading extends JTextArea
{
public boolean type;
public AbstractDocument doc;
public ArrayList<JPanel/*Question*/> questions;
public ArrayList<JPanel/*List*/> list;
public Heading(boolean segment, Page page)
{
type = segment;
setBackground(Color.RED);
setFont(new Font("Arial", Font.BOLD, 20));
Border in = BorderFactory.createDashedBorder(Color.BLACK);
Border out = BorderFactory.createMatteBorder(0, 0, 10, 0, Color.WHITE);
setBorder(BorderFactory.createCompoundBorder(out, in));
setLineWrap(true);
setWrapStyleWord(true);
setText("Heading 1 Heading 1 Heading 1 Heading 1");
doc = (AbstractDocument)this.getDocument();
doc.setDocumentFilter(new DocumentFilter()
{
public void insertString(FilterBypass fb, int offs,String str, AttributeSet a) throws BadLocationException
{
if ((fb.getDocument().getLength() + str.length()) <= 100)
{
;
fb.insertString(offs, str.replaceAll("\n", " "), a);
}
else
{
int spaceLeft = 100 - fb.getDocument().getLength();
if (spaceLeft <= 0)
return;
fb.insertString(offs, str.substring(0,spaceLeft).replaceAll("\n", " "), a);
}
}
public void replace(FilterBypass fb, int offs, int length, String str, AttributeSet a) throws BadLocationException
{
if (str.equals("\n"))
{
str = "";
}
if ((fb.getDocument().getLength() + str.length() - length) <= 100)
{
fb.replace(offs, length, str.replaceAll("\n", " "), a);
}
else
{
int spaceLeft = 100 - fb.getDocument().getLength() + length;
if (spaceLeft <= 0)
return;
fb.replace(offs, length, str.substring(0,spaceLeft).replaceAll("\n", " "), a);
}
}
});
page.add(this, 0);
page.content++;
if (type)
{
questions = new ArrayList<JPanel>();
}
else
{
list = new ArrayList<JPanel>();
}
}
}
@SuppressWarnings("serial")
class Question extends JPanel
{
public JPanel questionArea, numberArea, answerArea;
public JLabel number;
public JTextArea question;
public AbstractDocument doc;
public Question(Page page, int pageNum, int index)
{
setLayout(new BoxLayout(this, BoxLayout.Y_AXIS));
setBorder(BorderFactory.createMatteBorder(0, 0, 5, 0, Color.WHITE));
questionArea = new JPanel();
questionArea.setLayout(new BoxLayout(questionArea, BoxLayout.X_AXIS));
questionArea.setBorder(BorderFactory.createMatteBorder(0, 0, 8, 0, Color.WHITE));
numberArea = new JPanel();
numberArea.setLayout(new BorderLayout());
numberArea.setBackground(Color.WHITE);
number = new JLabel(pageNum+". ", JLabel.RIGHT);
number.setMinimumSize(new Dimension(100, 20));
number.setPreferredSize(new Dimension(100, 20));
number.setMaximumSize(new Dimension(100, 20));
number.setFont(new Font("Arial", Font.PLAIN, 17));
numberArea.add(number, BorderLayout.NORTH);
questionArea.add(numberArea);
question = new JTextArea();
question.setFont(new Font("Arial", Font.PLAIN, 17));
question.setBorder(BorderFactory.createDashedBorder(Color.BLACK));
question.setLineWrap(true);
question.setWrapStyleWord(true);
question.setBackground(Color.GREEN);
question.setText("Is this the first question?");
doc = (AbstractDocument)question.getDocument();
doc.setDocumentFilter(new DocumentFilter()
{
public void insertString(FilterBypass fb, int offs,String str, AttributeSet a) throws BadLocationException
{
if ((fb.getDocument().getLength() + str.length()) <= 200)
{
;
fb.insertString(offs, str.replaceAll("\n", " "), a);
}
else
{
int spaceLeft = 200 - fb.getDocument().getLength();
if (spaceLeft <= 0)
return;
fb.insertString(offs, str.substring(0,spaceLeft).replaceAll("\n", " "), a);
}
}
public void replace(FilterBypass fb, int offs, int length, String str, AttributeSet a) throws BadLocationException
{
if (str.equals("\n"))
{
str = "";
}
if ((fb.getDocument().getLength() + str.length() - length) <= 200)
{
fb.replace(offs, length, str.replaceAll("\n", " "), a);
}
else
{
int spaceLeft = 200 - fb.getDocument().getLength() + length;
if (spaceLeft <= 0)
return;
fb.replace(offs, length, str.substring(0,spaceLeft).replaceAll("\n", " "), a);
}
}
});
questionArea.add(question);
add(questionArea);
answerArea = new JPanel();
answerArea.setLayout(new BoxLayout(answerArea, BoxLayout.Y_AXIS));
add(answerArea);
page.add(this, index);
page.content++;
}
}
@SuppressWarnings("serial")
class Answer extends JPanel
{
public JPanel letterArea;
public JLabel letter;
public JTextArea answer;
public char[] letters = {'a', 'b', 'c', 'd', 'e' };
public AbstractDocument doc;
public Answer(Question q, int index)
{
setLayout(new BoxLayout(this, BoxLayout.X_AXIS));
letterArea = new JPanel();
letterArea.setLayout(new BorderLayout());
letterArea.setBackground(Color.WHITE);
letter = new JLabel(letters[index-1]+") ", JLabel.RIGHT);
letter.setMinimumSize(new Dimension(150, 20));
letter.setPreferredSize(new Dimension(150, 20));
letter.setMaximumSize(new Dimension(150, 20));
letter.setFont(new Font("Arial", Font.PLAIN, 17));
letterArea.add(letter, BorderLayout.NORTH);
add(letterArea);
answer = new JTextArea();
answer.setFont(new Font("Arial", Font.PLAIN, 17));
Border in = BorderFactory.createDashedBorder(Color.BLACK);
Border out = BorderFactory.createMatteBorder(0, 0, 5, 0, Color.WHITE);
answer.setBorder(BorderFactory.createCompoundBorder(out, in));
answer.setLineWrap(true);
answer.setWrapStyleWord(true);
answer.addKeyListener(new KeyListener()
{
@Override
public void keyPressed(KeyEvent arg0)
{
new Answer((Question) ((JTextArea) arg0.getSource()).getParent().getParent().getParent(), 2);
Main.mWindow.repaint();
Main.mWindow.validate();
}
public void keyReleased(KeyEvent arg0) {}
public void keyTyped(KeyEvent arg0) {}
});
doc = (AbstractDocument)answer.getDocument();
doc.setDocumentFilter(new DocumentFilter()
{
public void insertString(FilterBypass fb, int offs,String str, AttributeSet a) throws BadLocationException
{
if ((fb.getDocument().getLength() + str.length()) <= 200)
{
;
fb.insertString(offs, str.replaceAll("\n", " "), a);
}
else
{
int spaceLeft = 200 - fb.getDocument().getLength();
if (spaceLeft <= 0)
return;
fb.insertString(offs, str.substring(0,spaceLeft).replaceAll("\n", " "), a);
}
}
public void replace(FilterBypass fb, int offs, int length, String str, AttributeSet a) throws BadLocationException
{
if (str.equals("\n"))
{
str = "";
}
if ((fb.getDocument().getLength() + str.length() - length) <= 200)
{
fb.replace(offs, length, str.replaceAll("\n", " "), a);
}
else
{
int spaceLeft = 200 - fb.getDocument().getLength() + length;
if (spaceLeft <= 0)
return;
fb.replace(offs, length, str.substring(0,spaceLeft).replaceAll("\n", " "), a);
}
}
});
answer.setBackground(Color.PINK);
add(answer);
q.answerArea.add(this, index-1);
}
}
public class Main
{
public static Properties config;
public static Locale currentLocale;
public static ResourceBundle lang;
public static JFrame mWindow;
public static JMenuBar menu;
public static JMenu menuFile, menuEdit;
public static JMenuItem itmNew, itmClose, itmLoad, itmSave, itmSaveAs, itmExit, itmCut, itmCopy, itmPaste, itmProperties;
public static JDialog newDoc;
public static JLabel newDocText1, newDocText2;
public static JRadioButton questions, list;
public static ButtonGroup newDocButtons;
public static JButton newDocOk;
public static Boolean firstSegment;
public static JPanel workspace;
public static JScrollPane scroll;
public static ArrayList<Page> pages;
public static void newDocumentForm()
{
//new document dialog
mWindow.setEnabled(false);
newDoc = new JDialog(mWindow, "newDoc");
newDoc.setDefaultCloseOperation(JFrame.DO_NOTHING_ON_CLOSE);
newDoc.addWindowListener(new WindowListener ()
{
public void windowActivated(WindowEvent arg0) {}
public void windowClosing(WindowEvent arg0)
{
mWindow.toFront();
newDocText1 = null;
newDocText2 = null;
questions = null;
list = null;
newDocButtons = null;
newDocOk = null;
newDoc.dispose();
mWindow.setEnabled(true);
}
public void windowClosed(WindowEvent arg0) {}
public void windowDeactivated(WindowEvent arg0) {}
public void windowDeiconified(WindowEvent arg0) {}
public void windowIconified(WindowEvent arg0) {}
public void windowOpened(WindowEvent arg0) {}
});
newDoc.setSize(400, 200);
newDoc.setLocationRelativeTo(null);
newDoc.setResizable(false);
newDoc.setLayout(null);
newDoc.setVisible(true);
newDocText1 = new JLabel("newDocText1");
newDocText1.setBounds(5, 0, 400, 20);
newDocText2 = new JLabel("newDocText2");
newDocText2.setBounds(5, 20, 400, 20);
newDoc.add(newDocText1);
newDoc.add(newDocText2);
firstSegment = true;
questions = new JRadioButton("questions");
questions.setSelected(true);
questions.setFocusPainted(false);
questions.setBounds(10, 60, 400, 20);
questions.addActionListener(new ActionListener()
{
public void actionPerformed(ActionEvent arg0)
{
firstSegment = true;
}
});
list = new JRadioButton("list");
list.setFocusPainted(false);
list.setBounds(10, 80, 400, 20);
list.addActionListener(new ActionListener()
{
public void actionPerformed(ActionEvent arg0)
{
firstSegment = false;
}
});
newDoc.add(questions);
newDoc.add(list);
newDocButtons = new ButtonGroup();
newDocButtons.add(questions);
newDocButtons.add(list);
newDocOk = new JButton("ok");
newDocOk.addKeyListener(new KeyListener()
{
public void keyPressed(KeyEvent e)
{
if (e.getKeyCode() == KeyEvent.VK_ENTER)
{
newDocOk.doClick();
}
}
public void keyReleased(KeyEvent e) {}
public void keyTyped(KeyEvent e) {}
});
newDocOk.setFocusPainted(false);
newDocOk.setBounds(160, 120, 80, 40);
newDocOk.setMnemonic(KeyEvent.VK_ACCEPT);
newDocOk.addActionListener(new ActionListener()
{
public void actionPerformed(ActionEvent arg0)
{
createNewDocument();
}
});
newDoc.add(newDocOk);
newDocOk.requestFocus();
}
public static void createNewDocument()
{
//dispose of new document dialog
mWindow.toFront();
newDocText1 = null;
newDocText2 = null;
questions = null;
list = null;
newDocButtons = null;
newDocOk = null;
newDoc.dispose();
mWindow.setEnabled(true);
//create document display
workspace = new JPanel();
workspace.setLayout(new BoxLayout(workspace, BoxLayout.PAGE_AXIS));
workspace.add(new Box.Filler(new Dimension(0, 40), new Dimension(0, 40), new Dimension(0, 40)));
workspace.setBackground(Color.BLACK);
scroll = new JScrollPane(JScrollPane.VERTICAL_SCROLLBAR_ALWAYS, JScrollPane.HORIZONTAL_SCROLLBAR_NEVER);
scroll.getVerticalScrollBar().setUnitIncrement(20);
scroll.setViewportView(workspace);
pages = new ArrayList<Page>();
Page p = new Page(workspace, 1);
new Heading(true, p);
Question q = new Question(p, 1, 1);
new Answer(q, 1);
mWindow.add(scroll, BorderLayout.CENTER);
mWindow.repaint();
mWindow.validate();
}
public static void main(String[] args) throws FileNotFoundException, IOException
{
//create main window
mWindow = new JFrame("title");
mWindow.setSize(1000, 800);
mWindow.setMinimumSize(new Dimension(1000, 800));
mWindow.setLocationRelativeTo(null);
mWindow.setLayout(new BorderLayout());
mWindow.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
mWindow.setVisible(true);
//create menu bar
menu = new JMenuBar();
menuFile = new JMenu("file");
menuEdit = new JMenu("edit");
itmNew = new JMenuItem("new");
itmNew.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_N, ActionEvent.CTRL_MASK));
itmNew.addActionListener(new ActionListener()
{
public void actionPerformed(ActionEvent e)
{
newDocumentForm();
}
});
itmClose = new JMenuItem("close");
itmClose.setActionCommand("Close");
itmClose.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_W, ActionEvent.CTRL_MASK));
itmLoad = new JMenuItem("load");
itmLoad.setActionCommand("Load");
itmLoad.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_L, ActionEvent.CTRL_MASK));
itmSave = new JMenuItem("save");
itmSave.setActionCommand("Save");
itmSave.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_S, ActionEvent.CTRL_MASK));
itmSaveAs = new JMenuItem("saveAs");
itmSaveAs.setActionCommand("SaveAs");
itmExit = new JMenuItem("exit");
itmExit.addActionListener(new ActionListener()
{
public void actionPerformed(ActionEvent e)
{
//Add confirmation window!
System.exit(0);
}
});
itmCut = new JMenuItem("cut");
itmCut.setActionCommand("Cut");
itmCut.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_X, ActionEvent.CTRL_MASK));
itmCopy = new JMenuItem("copy");
itmCopy.setActionCommand("Copy");
itmCopy.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_C, ActionEvent.CTRL_MASK));
itmPaste = new JMenuItem("paste");
itmPaste.setActionCommand("Paste");
itmPaste.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_V, ActionEvent.CTRL_MASK));
itmProperties = new JMenuItem("properties");
itmProperties.setActionCommand("properties");
itmProperties.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_P, ActionEvent.CTRL_MASK));
menuFile.add(itmNew);
menuFile.add(itmClose);
menuFile.addSeparator();
menuFile.add(itmLoad);
menuFile.addSeparator();
menuFile.add(itmSave);
menuFile.add(itmSaveAs);
menuFile.addSeparator();
menuFile.add(itmExit);
menuEdit.add(itmCut);
menuEdit.add(itmCopy);
menuEdit.add(itmPaste);
menuEdit.addSeparator();
menuEdit.add(itmProperties);
menu.add(menuFile);
menu.add(menuEdit);
//create actionListener for menus
mWindow.add(menu, BorderLayout.NORTH);
mWindow.repaint();
mWindow.validate();
}
}
包核；
导入java.awt.BorderLayout；
导入java.awt.Color；
导入java.awt.Component；
导入java.awt.Dimension；
导入java.awt.Font；
导入java.awt.event.ActionEvent；
导入java.awt.event.ActionListener；
导入java.awt.event.KeyEvent；
导入java.awt.event.InputEvent；
导入java.awt.event.KeyListener；
导入java.awt.event.WindowEvent；
导入java.awt.event.WindowListener；
导入java.io.FileInputStream；
导入java.io.FileNotFoundException；
导入java.io.IOException；
导入java.sql.Array；
导入java.util.ArrayList；
导入java.util.Locale；
导入java.util.Properties；
导入java.util.ResourceBundle；
导入javax.swing.BorderFactory；
导入javax.swing.Box；
导入javax.swing.BoxLayout；
导入javax.swing.ButtonGroup；
导入javax.swing.JButton；
导入javax.swing.JDialog；
导入javax.swing.JFrame；
导入javax.swing.JLabel；
导入javax.swing.JMenu；
导入javax.swing.JMenuBar；
导入javax.swing.JMenuItem；
导入javax.swing.JPanel；
导入javax.swing.JRadioButton；
导入javax.swing.JScrollPane；
导入javax.swing.JTextArea；
导入javax.swing.KeyStroke；
导入javax.swing.border.border；
导入javax.swing.text.AbstractDocument；
导入javax.swing.text.AttributeSet；
导入javax.swing.text.BadLocationException；
导入javax.swing.text.DocumentFilter；
@抑制警告（“串行”）
类DefaultFont扩展了字体
{
公共默认字体（）
{
超级（“Arial”，普通，20）；
}
}
@抑制警告（“串行”）
类页面扩展了JPanel
{
公共JPanel大页面；
公共内容；
公共页面（JPanel面板，int索引）
{
largePage=新的JPanel（）；
largePage.setLayout（新的BoxLayout（largePage，BOXLAYOU.Y_轴））；
设置最大尺寸（新尺寸（7941123））；
setPreferredSize（新维度（7941123））；
大页面设置对齐X（组件中心对齐）；
大页面。背景（颜色。白色）；
大页面。添加（新框。填充（新维度（0，96），新维度（0，96），新维度（0，96））；
setMaximumSize（新尺寸（556931））；
立根背景（颜色：浅灰色）；
setLayout（新的BoxLayout（这是BoxLayout.Y_轴））；
添加（新框。填充物（新尺寸（556,0）、新尺寸（556,931）、新尺寸（556,931））；
大页面。添加（此）；
大页面。添加（新框。填充（新维度（0，96），新维度（0，96），新维度（0，96））；
面板。添加（大页面，索引）；
面板。添加（新框。填充物（新尺寸（0,40）、新尺寸（0,40）、新尺寸（0,40））；
内容=0；
Main.pages.add（本）；
}
}
@抑制警告（“串行”）
类标题扩展了JTextArea
{
公共布尔型；
公共文件；
公共阵列问题；
公共阵列列表；
公共标题（布尔段，第页）
{
类型=段；
挫折地面（颜色：红色）；
setFont（新字体（“Arial”，Font.BOLD，20））；
Border in=BorderFactory.createDashedBorder（颜色：黑色）；
Border out=BorderFactory.createMatteBorder（0,0,10,0，Color.WHITE）；
setboorder（BorderFactory.createCompoundBorder（out，in））；
setLineWrap（真）；
setWrapStyleWord（true）；
setText（“品目1品目1品目1”）；
doc=（AbstractDocument）this.getDocument（）；
doc.setDocumentFilter（新的DocumentFilter（）
{
public void insertString（FilterBypass fb、int offs、String str、AttributeSet a）引发BadLocationException
{
如果（（fb.getDocument（）.getLength（）+str.length（））您可能需要验证（）
然后重新绘制（）
在键侦听器中
可能是一个更好的方法。布局管理器？你有样本吗？我可以将整个程序粘贴到你身上，并指出绘制组件的位置…在验证之前不要设置可见
；如果不是这样，请编辑你的问题，以包括一个显示你所设计问题的scribe.sscce应该是一个简短的新程序，可能是从您现有的源代码派生的。我认为您可以在它可见之前（setVisible或“paint”调用之前）设置它的位置（setPosition）和大小（setSize）。它位于LayoutManager中，可以计算它的位置和大小。对于上面的注释，它不起作用，我添加了代码。我厌倦了，它不起作用。顺便说一句，我使用了键绑定，但不知道它们的存在！谢谢…好的。对不起，我帮不上更多忙。这是我最喜欢的将键绑定到按钮的方法。