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history/016c1_OneInput/src/main/java/com/gitee/drinkjava2/frog/brain/MouseAction.java

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+package com.gitee.drinkjava2.frog.brain;
+
+import java.awt.event.MouseEvent;
+import java.awt.event.MouseListener;
+import java.awt.event.MouseMotionListener;
+import java.awt.event.MouseWheelEvent;
+import java.awt.event.MouseWheelListener;
+
+/**
+ * MouseAction
+ * 
+ * 这个类用来处理脑图BrainPicture上的鼠标动作，有平移、旋转、缩放三种
+ * 
+ * @author Yong Zhu
+ * @since 2.0.2
+ */
+public class MouseAction implements MouseListener, MouseWheelListener, MouseMotionListener {
+	private BrainPicture brainPic;
+	private int buttonPressed = 0;
+	private int x;
+	private int y;
+
+	public MouseAction(BrainPicture brainPic) {
+		this.brainPic = brainPic;
+	}
+
+	@Override
+	public void mousePressed(MouseEvent e) {// 记录当前鼠标点
+		if (e.getButton() == 1)// 旋转
+			buttonPressed = 1;
+		else if (e.getButton() == 2)// 缩放
+			buttonPressed = 2;
+		else
+			buttonPressed = 0;
+		x = e.getPoint().x;
+		y = e.getPoint().y;
+		brainPic.requestFocus();
+	}
+
+	@Override
+	public void mouseReleased(MouseEvent e) {
+		buttonPressed = 0;
+	}
+
+	@Override
+	public void mouseWheelMoved(MouseWheelEvent e) {// 缩放
+		if (e.getWheelRotation() < 0) {
+			brainPic.scale *= 1.1;
+			brainPic.xOffset *= 1.1;
+			brainPic.yOffset *= 1.1;
+		} else {
+			brainPic.scale /= 1.1;
+			brainPic.xOffset /= 1.1;
+			brainPic.yOffset /= 1.1;
+		}
+	}
+
+	@Override
+	public void mouseDragged(MouseEvent e) {// 旋转
+		if (buttonPressed == 1) {
+			if (e.getX() > x && e.getY() > y)
+				brainPic.zAngle -= .00f;
+			else if (e.getX() < x && e.getY() < y)
+				brainPic.zAngle += .00f;
+			else {
+				if (e.getX() > x)
+					brainPic.yAngle += .02f;
+				if (e.getX() < x)
+					brainPic.yAngle -= .02f;
+				if (e.getY() > y)
+					brainPic.xAngle -= .02f;
+				if (e.getY() < y)
+					brainPic.xAngle += .02f;
+			}
+			x = e.getX();
+			y = e.getY();
+		}
+		if (buttonPressed == 2) {// 平移
+			if (e.getX() > x)
+				brainPic.xOffset += 6;
+			if (e.getX() < x)
+				brainPic.xOffset -= 6;
+			if (e.getY() > y)
+				brainPic.yOffset += 6;
+			if (e.getY() < y)
+				brainPic.yOffset -= 6;
+			x = e.getX();
+			y = e.getY();
+		}
+	}
+
+	@Override
+	public void mouseClicked(MouseEvent e) {// do nothing
+	}
+
+	@Override
+	public void mouseEntered(MouseEvent e) {// do nothing
+	}
+
+	@Override
+	public void mouseExited(MouseEvent e) {// do nothing
+	}
+
+	@Override
+	public void mouseMoved(MouseEvent e) { // do nothing
+	}
+}