我可以采用我实例化的 MyHouse 对象之一，并以某种方式将其设置为与其底层 NscComponent 容器按比例缩放吗？
当我使用从 NscComponent 继承的 setSize 方法时，它不会更改 house1 MyHouse 对象的大小。它使容器变小，但对象不变，并且容器调整大小并剪掉大部分 house1 对象。我尝试在 MyHouse.java 中创建一个新方法，调整组成整个房子的每个 MyHouse 组件的大小，这很有效，但随后坐标全部搞砸了，房子本身看起来就像全部 splinter 了。
似乎必须操作 MyHouse 对象的每个单独组件来调整大小，这违背了创建对象的全部意义。
这是MyHouse代码:
/**
* A new graphic component. This component is used in
* the notes to highlight the process of designing a
* new object and then implementing it.
*
* @author Dan Jinguji
* @author Chris Wilson
* @version Demo: MyHouse
*/
public class MyHouse extends NscComponent {
// instance variables
private NscUpTriangle theRoof;
private NscRectangle theWalls;
private NscRectangle theDoor;
private NscRectangle theWindow;
private NscRectangle theWindowPane;
/**
* Constructor for objects of class MyHouse.
* This creates a MyHouse object at the specified
* location
* @param x the x-coordinate for the object
* @param y the y-coordinate for the object
*/
public MyHouse(int x, int y) {
// Specify the constructor for the superclass
super(x, y, 120, 90);
// Create the roof object
theRoof = new NscUpTriangle(0, 0, 120, 40);
// Set the characteristics of the roof
theRoof.setFilled(true);
theRoof.setBackground(new java.awt.Color(0x99, 0x33, 0x00));
// Place the roof in the MyHouse object
add(theRoof);
// Create the walls object
theWalls = new NscRectangle(10, 40, 100, 50);
// Set the characteristics of the walls
theWalls.setFilled(true);
theWalls.setBackground(java.awt.Color.blue);
// Place the walls in the MyHouse object
add(theWalls);
// Create the door object
theDoor = new NscRectangle(48, 50, 24, 40);
// Set the characteristics of the door
theDoor.setFilled(true);
theDoor.setBackground(new java.awt.Color(0x99, 0x66, 0x33));
// Place the door in the MyHouse object
add(theDoor);
// Create the window object
theWindow = new NscRectangle(80, 50, 25, 20);
// Set color
theWindow.setFilled(true);
theWindow.setBackground(java.awt.Color.white);
// Create custom glass color
java.awt.Color glass = new java.awt.Color(153, 255, 255);
// Create window pane object
theWindowPane = new NscRectangle(83, 53, 19, 14);
// Set color
theWindowPane.setFilled(true);
theWindowPane.setBackground(glass);
// add window and pane
add(theWindow);
add(theWindowPane);
}
/*
* Overloaded constructor for the MyHouse class
* Creates the house objects and also inputs color variable
*
* @param x the x-coordinate for the object
* @param y the y-coordinate for the object
* @param colorVar the color for the walls of the house
*/
public MyHouse(int x, int y, java.awt.Color colorVar) {
// constructor, call super before anything else
super(x, y, 120, 90);
// build roof and set color, then add
theRoof = new NscUpTriangle(0, 0, 120, 40);
theRoof.setFilled(true);
theRoof.setBackground(new java.awt.Color(0x99, 0x33, 0x00));
add(theRoof);
// Create the walls and pass the 3rd constructor parameter for color conversion, then add
theWalls = new NscRectangle(10, 40, 100, 50);
theWalls.setFilled(true);
theWalls.setBackground(colorVar);
add(theWalls);
// Create door, set color and add
theDoor = new NscRectangle(48, 50, 24, 40);
theDoor.setFilled(true);
theDoor.setBackground(new java.awt.Color(0x99, 0x66, 0x33));
add(theDoor);
// Create the window object
theWindow = new NscRectangle(80, 50, 25, 20);
// Set color
theWindow.setFilled(true);
theWindow.setBackground(java.awt.Color.white);
// Create custom glass color
java.awt.Color glass = new java.awt.Color(153, 255, 255);
// Create window pane object
theWindowPane = new NscRectangle(83, 53, 19, 14);
theWindowPane.setFilled(true);
theWindowPane.setBackground(glass);
// add window and pane
add(theWindow);
add(theWindowPane);
}
/**
* Change the color of the house
*
* @param c The color for the walls of the house
*/
public void setColor(java.awt.Color c) {
theWalls.setBackground(c);
repaint();
}
/**
* Retrieve the color of the house
*
* @return The color of the walls of the house
*/
public java.awt.Color getColor() {
return theWalls.getBackground();
}
}
这里是 MyScene 代码，它实例化 3 个 MyHouse 对象并将它们放入场景中。
// Allow short name access to java.awt.Color
import java.awt.Color;
/*
* This is the shell for assignment: MyScene.
* This program draws a simple scene using additional
* classes that the student creates.
*
* @author Dan Jinguji
* @author Chris Wilson
* @version Assignment 4: MyScene
*/
public class MyScene extends NscWindow {
// instance variables
private MyHouse house1;
private MyHouse house2;
private MyHouse house3;
private MyTree tree1;
private MyTree tree2;
private MyTree tree3;
/**
* Constructor for objects of class MyScene
*/
public MyScene() {
// Specify the constructor for the superclass
super(10, 10, 400, 300);
// set characteristics for the object
setTitle("My Scene");
// Draw the sky
getContentPane().setBackground(new Color(0x00, 0xCC, 0xFF));
// Draw some grass
NscRectangle grass = new NscRectangle(0, 100, 400, 200);
grass.setBackground(new Color(0x00, 0x99, 0x00));
grass.setFilled(true);
add(grass);
// instantiate new house objects
house1 = new MyHouse(100, 50, Color.white);
add(house1);
house2 = new MyHouse(200, 150);
add(house2);
house3 = new MyHouse(0, 200, Color.orange);
add(house3);
// request a rerendering of the window
repaint();
// instantiate new tree objects
tree1 = new MyTree(35, 20, Color.white);
add(tree1);
tree2 = new MyTree(290, 50);
add(tree2);
tree3 = new MyTree(5, 60, Color.cyan);
add(tree3);
// request a rerender
repaint();
}
/**
* Alter the scene, by changing color
*/
public void change1() {
// change the color of the houses and trees
house1.setColor(Color.red);
tree1.setColor(Color.black);
house2.setColor(Color.magenta);
tree2.setColor(Color.orange);
house3.setColor(Color.black);
tree3.setColor(Color.pink);
// request a rerendering of the window
repaint();
}
/**
* Alter the scene, by changing location
*/
public void change2() {
// change the location of the houses and trees
house1.setLocation(50, 125);
house2.setLocation(150, 25);
house3.setLocation(0, 150);
tree1.setLocation(25, 10);
tree2.setLocation(300, 20);
tree3.setLocation(150, 90);
// request a rerendering of the window
repaint();
}
/**
* Alter the scene, by changing size of objects and underlying containers
*
*/
public void change3() {
house1.setSize(80, 60);
}
/**
* Alter the scene, restoring original settings
*/
public void reset() {
// reset the initial values for the house
house1.setLocation(100, 50);
house1.setColor(Color.white);
house1.setSize(120, 90);
// reset the initial values for the house
house2.setLocation(200, 150);
house2.setColor(Color.blue);
house2.setSize(120, 90);
// reset the initial values for the house
house3.setLocation(0, 200);
house3.setColor(Color.orange);
house3.setSize(120, 90);
// rest the initial values for the tree
tree1.setLocation(35, 20);
tree1.setColor(Color.white);
tree1.setSize(60, 120);
// rest the initial values for the tree
tree2.setLocation(290, 50);
tree2.setColor(Color.green);
tree2.setSize(60, 120);
// rest the initial values for the tree
tree3.setLocation(5, 90);
tree3.setColor(Color.cyan);
tree3.setSize(60, 120);
// request a rerendering of the window
repaint();
}
/**
* The application method, to test your code
*
* @param args The command-line arguments
*/
public static void main(String[] args) {
// declare a MyScene reference
MyScene aScene;
// instantiate MyScene
aScene = new MyScene();
// pause
javax.swing.JOptionPane.showMessageDialog(null, "Press OK to continue");
// test setColor
aScene.change1();
javax.swing.JOptionPane.showMessageDialog(null, "Press OK to continue");
// test setLocation
aScene.change2();
javax.swing.JOptionPane.showMessageDialog(null, "Press OK to continue");
// test setSize
aScene.change3();
javax.swing.JOptionPane.showMessageDialog(null, "Press OK to continue");
// reset initial values
aScene.reset();
}
}
最佳答案
您的问题是您正在手动指定每个组件的大小。当然，如果您手动指定事物的大小和位置，那么重新计算它们将是一个巨大的痛苦!当然，您必须使用 ComponentListener 之类的东西再次指定它们。
但是...还有更好的方法。 Swing 有一个 LayoutManager 的概念这一切都为您完成!
我个人认为，一些不同的布局管理器比其他布局管理器做得更好 GroupLayout在处理调整窗口大小的具体问题时是最强大的。
tl;dr 因此，请记住，不要使用 .setSize() 指定尺寸，也不要使用 setLocation() 指定位置，而应使用 LayoutManager。
关于java - 我可以将 Swing 对象设置为与其底层容器的大小成比例吗？，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/31492843/