我正在制作一个绘图小程序，但我无法重新调整线条的大小。矩形和椭圆形重新调整大小就好了，但不是线。我相信我对重新调整大小的方法有正确的代码，以允许重新调整行的大小，但它就是行不通。我希望有人能帮我解决这个问题。
这是课程：
import java.awt.Color;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.util.ArrayList;
import model.Model;
import shapes.Rectangle;
import shapes.Shape;
import shapes.Line;
import ui.panels.ActionPanel;
import ui.panels.ButtonPanel.ColorPanel;
import ui.panels.MainPanel;
public class ShapeMouseHandler extends MouseAdapter {
private Model model;
private int startX;
private int startY;
private int dragStartX;
private int dragStartY;
private String oldColor;
private MainPanel.ColorPanel colorPanel;
private ActionPanel actionPanel;
private int i = -1, selectedInstance = 0;
private ArrayList<Shape> shape = new ArrayList<Shape>();
public ShapeMouseHandler(Model model) {
this.model = model;
}
public void mousePressed(MouseEvent e) {
dragStartX = e.getX();
dragStartY = e.getY();
if (model.getAction() == Model.Actions.DRAW) {
startX = e.getX();
startY = e.getY();
i++;
shape.add(model.createShape(i));
if (shape.get(i) != null) {
shape.get(i).setFillColor(colorPanel.getFillColorSelection());
shape.get(i).setLineColor(colorPanel.getLineColorSelection());
shape.get(i).setX(e.getX());
shape.get(i).setY(e.getY());
if (shape.get(i) instanceof Line) {
((Line)shape.get(i)).setX2(e.getX());
((Line)shape.get(i)).setY2(e.getY());
}
}
}
if (model.getAction() == Model.Actions.MOVE) {
selectedInstance = model.getSelectedInstance(e.getX(), e.getY());
System.out.println("Selected Index :------------- " + selectedInstance);
if (selectedInstance != -1) {
oldColor = shape.get(selectedInstance).getLineColorType();
shape.get(selectedInstance).setLineColor(Model.MyColors.RED.toString());
startX = shape.get(selectedInstance).getX() - e.getX();
startY = shape.get(selectedInstance).getY() - e.getY();
}
}
if (model.getAction() == Model.Actions.RESIZE) {
selectedInstance = model.getSelectedInstance(e.getX(), e.getY());
if (selectedInstance != -1) {
startX=shape.get(selectedInstance).getX();
startY=shape.get(selectedInstance).getY();
oldColor = shape.get(selectedInstance).getLineColorType();
shape.get(selectedInstance).setLineColor(Model.MyColors.RED.toString());
}
}
if (model.getAction() == Model.Actions.REMOVE) {
selectedInstance = model.getSelectedInstance(e.getX(), e.getY());
if (selectedInstance != -1) {
model.removeShape(selectedInstance);
shape.remove(selectedInstance);
}
}
if (model.getAction() == Model.Actions.CHANGE) {
selectedInstance = model.getSelectedInstance(e.getX(), e.getY());
if (selectedInstance != -1) {
Shape selected = model.getShapes().get(selectedInstance);
startX = selected.getX();
startY = selected.getY();
int width = selected.getWidth();
int height = selected.getHeight();
if (shape.get(selectedInstance) != null) {
shape.get(selectedInstance).setLineColor(colorPanel.getLineColorSelection());
shape.get(selectedInstance).setFillColor(colorPanel.getFillColorSelection());
if (shape.get(selectedInstance) instanceof Rectangle) {
((Rectangle) shape.get(selectedInstance)).setFill(actionPanel.isFillChecked());
}
}
}
}
model.getContainer().repaint();
}
public void mouseDragged(MouseEvent e) {
if (shape != null) {
if (model.getAction() == Model.Actions.DRAW) {
if (shape.get(i) instanceof Line) {
((Line) shape.get(i)).setX2(e.getX());
((Line) shape.get(i)).setY2(e.getY());
} else {
shape.get(i).setX(Math.min(startX, e.getX()));
shape.get(i).setY(Math.min(startY, e.getY()));
if (true) {
(shape.get(i)).setWidth(Math.abs(startX - e.getX()));
(shape.get(i)).setHeight(Math.abs(startY - e.getY()));
}
}
}
if (model.getAction() == Model.Actions.MOVE) {
if (selectedInstance != -1) {
shape.get(selectedInstance).setX(e.getX() + startX);
shape.get(selectedInstance).setY(e.getY() + startY);
}
if (shape.get(i) instanceof Line) {
int diffX = e.getX() - dragStartX;
dragStartX = e.getX();
int diffY = e.getY() - dragStartY;
dragStartY = e.getY();
((Line) shape.get(i)).moveLineX(diffX);
((Line) shape.get(i)).moveLineY(diffY);
}
if (model.getAction() == Model.Actions.RESIZE) {
if (shape.get(i) instanceof Line) {
System.out.println("Resizing line");
((Line) shape.get(i)).setX2(e.getX());
((Line) shape.get(i)).setY2(e.getY());
} else {
shape.get(selectedInstance).setX(Math.min(startX, e.getX()));
shape.get(selectedInstance).setY(Math.min(startY, e.getY()));
shape.get(selectedInstance).setWidth(Math.abs(startX - e.getX()));
shape.get(selectedInstance).setHeight(Math.abs(startY - e.getY()));
}
//}
}
if (model.getAction() == Model.Actions.CHANGE && selectedInstance != -1) {
}
}
model.getContainer().repaint();
}
}
public void mouseReleased(MouseEvent e) {
if (selectedInstance != -1 && (model.getAction() == Model.Actions.MOVE || model.getAction() == Model.Actions.RESIZE)) {
shape.get(selectedInstance).setLineColor(oldColor);
}
}
public void reset() {
i = -1;
shape.clear();
}
public void setPanels(MainPanel.ColorPanel colorPanel, ActionPanel actionPanel) {
this.colorPanel = colorPanel;
this.actionPanel = actionPanel;
}
}