mousea.java

用JAVA实现。一个简单的画图软件。可以进行简单的操作。还可以实现简单的图形绘画。如三角形等。

package DrawPlat;

import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;

import javax.swing.JLabel;
import javax.swing.JOptionPane;

public class mouseA   extends MouseAdapter  {
	
	private DrawPlat mdp;
	private JLabel statusBar; //显示鼠标状态的提示条
	private drawings[] itemList;	  //用来存放基本图形的数组
	private int currentChoice ;		//设置默认画图状态为随笔画
	private int index ;						//当前已经绘制的图形的数目
	private int records = 0;
	public mouseA(DrawPlat mdp) {
		this.mdp = mdp;
		index = mdp.index;
		itemList = mdp.itemList;
		statusBar = mdp.statusBar;
	}

	public void mouseEntered(MouseEvent e) {
		

	}

	
	public void mouseExited(MouseEvent e) {
		
	}

	
	public void mousePressed(MouseEvent e) {
		
		//设置状态提示
		int x , y ;
		x = e.getX();
		y = e.getY();

	
		
		itemList[index].x1 = itemList[index].x2 = x;
		itemList[index].y1 = itemList[index].y2 = y;


		
		//如果当前选择的图形是随笔画或橡皮擦，则进行下面的操作
		if(currentChoice == 3 || currentChoice == 13) {
			itemList[index].x1 = itemList[index].x2 = x;
			itemList[index].y1 = itemList[index].y2 = y;

		}
		//如果当前选择图形式文字输入，则进行如下操作
		if(currentChoice == 14) {
			itemList[index].x1 = x;
			itemList[index].y1 = y;
			
			String input;
			input = JOptionPane.showInputDialog(
					"Please input the text you want!");
			itemList[index].s1 = input;

			index++;
			currentChoice = 14;
			mdp.createNewItem();
			mdp.drawingArea.repaint();
		}
		
		
	}


	public void mouseReleased(MouseEvent e) {
	
		
		int x , y ;
		x = e.getX();
		y = e.getY();

		if(currentChoice == 3 || currentChoice == 13 ) {
			itemList[index].x1 = x;
			itemList[index].y1 = y;
		}

		itemList[index].x2 = x;
		itemList[index].y2 = y;
		try{
		mdp.repaint();
		} catch(NullPointerException npe) {
			
		}
		mdp.records[records++]=index;

		
	}
	
}//mouseA