-1
Java的我想創建一個多邊形onMouseMove()
事件多邊形。創建使用的鼠標移動事件
這裏是我試過:
public DrawingListners(JMapPane mappane) {
this._Pane = mappane;
this._Pane.addMouseListener(new MapMouseAdapter() {
@Override
public void onMouseClicked(MapMouseEvent ev) {
if (ev.getClickCount() == 2 && _Drawing == Drawings.Polygon) {
CreateFeatureCollection();
addPolygonToFC(poly);
for (int i = 0; i < nNumbers; i++) {
System.out.println(poly.xPoints[i] + ":" + poly.yPoints[i]);
}
notifyParent.firePropertyChange(CallType.Drawing.toString(), null, null);
dragged = false;
graphics.dispose();
graphics = null;
startPos = null;
poly = null;
nNumbers = 0;
}
}
@Override
public void onMousePressed(MapMouseEvent ev) {
if (enabled) {
startPos = new Point(ev.getPoint());
if (_Drawing != Drawings.Marker)
dragged = true;
if (poly == null) {
poly = new pMapPolygon();
}
poly.addPoint(startPos.x, startPos.y, nNumbers);
nNumbers++;
}
}
@Override
public void onMouseMoved(MapMouseEvent ev) {
if (enabled && poly != null) {
ensureGraphics();
if (_Drawing == Drawings.Polygon) {
poly.addPoint(ev.getPoint().x, ev.getPoint().y, nNumbers);
//graphics.drawPolygon(poly.xPoints, poly.yPoints, poly.xPoints.length);
graphics.setColor(Color.blue);
graphics.fillPolygon(poly.xPoints, poly.yPoints, poly.xPoints.length);
//graphics.drawPolygon(poly.xPoints, poly.yPoints, poly.xPoints.length);
}
}
}
@Override
public void onMouseDragged(MapMouseEvent ev) {
}
@Override
public void onMouseReleased(MapMouseEvent ev) {
}
private void ensureGraphics() {
if (graphics == null) {
graphics = (Graphics2D) _Pane.getGraphics();
graphics.setColor(Color.WHITE);
graphics.setXORMode(Color.RED);
}
}
});
}
}
class pMapPolygon {
int[] xPoints = new int[500];
int[] yPoints = new int[500];
int nNumber = 0;
public pMapPolygon() {
}
public void addPoint(int x1, int y1, int number) {
// System.out.println(x1 + ":" + y1);
if (number == 0) {
for (int i = number; i < xPoints.length; i++) {
xPoints[i] = x1;
yPoints[i] = y1;
}
} else {
xPoints[number] = x1;
yPoints[number] = y1;
}
nNumber = number;
}
}
什麼我需要做的,實現這一目標?我究竟做錯了什麼?
我已經創建,其具有所需要的參數和xPoints
和yPoints
來分添加到存儲所有x
和y
的陣列的功能的多邊形類pMapPolygon
。
我已經在onMousePressed()
和onMouseMoved()
中調用了該特定函數addPoint()
。但是,當我啓動應用程序,也不會產生正確的多邊形...
什麼宇宙是你?這是什麼語言?? – gpasch
歡迎來到Stack Overflow。請提供上下文,例如您正在使用的組件的名稱。還要說明發生了什麼問題:如果它沒有生成正確的多邊形,請告訴我們正確的多邊形與它生成的多邊形之間的區別。或顯示截圖。請閱讀http://stackoverflow.com/help/how-to-ask關於如何提出可以及時準確回答的問題。 – LarsH