フォームを枠線で装飾しないと、マウスイベントの監視が可能になります
JFrameに対してメソッドsetundecorated(true)が呼び出された場合、すると、フォームにはタイトルバーがなく、タイトルバーの閉じる、最大化、メニューを最小化します.
これは、マウスのモニタリングを実現するには、自分で手動でマウスのリスニングを追加する必要があります.次のコードは、マウスのリスニングを実現し、フォームのサイズを変更することです.(ここでは、追加クローズ、最大化、最小化ボタンは実装されていません)
ここでJRoundFrameはJFrameクラスを継承するクラスである.このクラスの構造方法にマウスリスニングを追加すると、マウスのフォームのサイズの変更が可能になります.
これは、マウスのモニタリングを実現するには、自分で手動でマウスのリスニングを追加する必要があります.次のコードは、マウスのリスニングを実現し、フォームのサイズを変更することです.(ここでは、追加クローズ、最大化、最小化ボタンは実装されていません)
/**
* ,
*
* @author mengke
* @email [email protected]
* @version 1.0
* @date 2012-2-25 10:45:48
*/
private class MouseInputHandler extends MouseInputAdapter {
private static final int CORNER_DRAG_WIDTH = 10;
private static final int BORDER_DRAG_THICKNESS = 5;
/** */
private boolean isMovingWindow;
private boolean dragging;
private int dragCursor;
private int dragOffsetX;
private int dragOffsetY;
private int dragWidth;
private int dragHeight;
private MouseInputHandler() {
}
/**
*
*/
@Override
public void mousePressed(MouseEvent e) {
if (!SwingUtilities.isLeftMouseButton(e)) {
return;
}
Point dragWindowOffset = e.getPoint();
Window win = (Window) e.getSource();
this.dragging = true;
if (win != null) {
/** */
win.toFront();
}
Frame frame = (win instanceof Frame) ? (Frame) win : null;
int frameState = frame != null ? frame.getExtendedState()
: Frame.NORMAL;
if (((frame != null) && ((frameState & Frame.MAXIMIZED_BOTH) == 0))) {
this.isMovingWindow = true;
this.dragOffsetX = dragWindowOffset.x;
this.dragOffsetY = dragWindowOffset.y;
}
if (!this.isMovingWindow && frame != null && frame.isResizable()
&& ((frameState & Frame.MAXIMIZED_BOTH) == 0)) {
this.dragOffsetX = dragWindowOffset.x;
this.dragOffsetY = dragWindowOffset.y;
}
this.dragWidth = win.getWidth();
this.dragHeight = win.getHeight();
this.dragCursor = getCursor(win, e);
}
@Override
public void mouseReleased(MouseEvent e) {
if (!SwingUtilities.isLeftMouseButton(e)) {
return;
}
if ((this.dragCursor != Cursor.DEFAULT_CURSOR)
&& (!JRoundFrame.this.isValid())) {
JRoundFrame.this.validate();
}
this.dragging = false;
this.isMovingWindow = false;
this.dragCursor = Cursor.DEFAULT_CURSOR;
mouseMoved(e);
}
@Override
public void mouseMoved(MouseEvent e) {
Window win = (Window) e.getSource();
Frame frame = (win instanceof Frame) ? (Frame) win : null;
int cursor = getCursor(win, e);
if ((cursor != 0)
&& (win.getBounds().contains(e.getLocationOnScreen()))
&& ((frame != null) && (frame.isResizable()) && ((frame
.getExtendedState() & Frame.MAXIMIZED_BOTH) == 0))) {
win.setCursor(Cursor.getPredefinedCursor(cursor));
} else {
win.setCursor(Cursor.getDefaultCursor());
}
}
@Override
public void mouseExited(MouseEvent e) {
if (!this.dragging) {
Window win = (Window) e.getSource();
win.setCursor(Cursor.getDefaultCursor());
}
}
@Override
public void mouseDragged(MouseEvent e) {
if (!SwingUtilities.isLeftMouseButton(e)) {
if (JRoundFrame.this.getBounds().contains(e.getPoint())) {
mouseMoved(e);
} else {
mouseExited(e);
}
return;
}
Window win = (Window) e.getSource();
Point point = e.getPoint();
if (this.isMovingWindow && this.dragCursor == Cursor.DEFAULT_CURSOR) {
Point eventLocationOnScreen = e.getLocationOnScreen();
win.setLocation(eventLocationOnScreen.x - this.dragOffsetX,
eventLocationOnScreen.y - this.dragOffsetY);
} else if (this.dragCursor != Cursor.DEFAULT_CURSOR) {
Rectangle rect = win.getBounds();
Rectangle startBounds = new Rectangle(rect);
Dimension min = win.getMinimumSize();
Dimension max = win.getMaximumSize();
switch (this.dragCursor) {
case Cursor.E_RESIZE_CURSOR:
adjust(rect, min, max, 0, 0, point.x
+ (this.dragWidth - this.dragOffsetX) - rect.width,
0);
break;
case Cursor.S_RESIZE_CURSOR:
adjust(rect, min, max, 0, 0, 0, point.y
+ (this.dragHeight - this.dragOffsetY)
- rect.height);
break;
case Cursor.N_RESIZE_CURSOR:
adjust(rect, min, max, 0, point.y - this.dragOffsetY, 0,
-(point.y - this.dragOffsetY));
break;
case Cursor.W_RESIZE_CURSOR:
adjust(rect, min, max, point.x - this.dragOffsetX, 0,
-(point.x - this.dragOffsetX), 0);
break;
case Cursor.NE_RESIZE_CURSOR:
adjust(rect, min, max, 0, point.y - this.dragOffsetY,
point.x + (this.dragWidth - this.dragOffsetX)
- rect.width, -(point.y - this.dragOffsetY));
break;
case Cursor.SE_RESIZE_CURSOR:
adjust(rect, min, max, 0, 0, point.x
+ (this.dragWidth - this.dragOffsetX) - rect.width,
point.y + (this.dragHeight - this.dragOffsetY)
- rect.height);
break;
case Cursor.NW_RESIZE_CURSOR:
adjust(rect, min, max, point.x - this.dragOffsetX, point.y
- this.dragOffsetY, -(point.x - this.dragOffsetX),
-(point.y - this.dragOffsetY));
break;
case Cursor.SW_RESIZE_CURSOR:
adjust(rect, min, max, point.x - this.dragOffsetX, 0,
-(point.x - this.dragOffsetX), point.y
+ (this.dragHeight - this.dragOffsetY)
- rect.height);
break;
}
if (!rect.equals(startBounds)) {
win.setBounds(rect);
if (Toolkit.getDefaultToolkit().isDynamicLayoutActive()) {
win.validate();
JRoundFrame.this.getRootPane().repaint();
}
}
}
}
/**
*
*/
@Override
public void mouseClicked(MouseEvent e) {
if (!SwingUtilities.isLeftMouseButton(e)) {
return;
}
Window win = (Window) e.getSource();
Frame frame = (win instanceof Frame) ? (Frame) win : null;
Point point = e.getPoint();
int clickCount = e.getClickCount();
if ((clickCount % 2 == 0)
&& (point.x <= 22)
&& (point.y <= 22)
&& (JRoundFrame.this.getRootPane()
.getWindowDecorationStyle() != 0)) {
JRoundFrame.this.dispatchEvent(new WindowEvent(
JRoundFrame.this, WindowEvent.WINDOW_CLOSING));
return;
}
if (frame == null) {
return;
}
int state = frame.getExtendedState();
Window fullWin = GraphicsEnvironment.getLocalGraphicsEnvironment()
.getDefaultScreenDevice().getFullScreenWindow();
if ((frame.isResizable()) && (frame != fullWin)
&& (clickCount % 2 == 0)) {
if ((state & Frame.MAXIMIZED_BOTH) != 0) {
frame.setExtendedState(state & 0xFFFFFFF9);
} else {
frame.setExtendedState(state | Frame.MAXIMIZED_BOTH);
}
}
}
private void adjust(Rectangle bounds, Dimension min, Dimension max,
int deltaX, int deltaY, int deltaWidth, int deltaHeight) {
bounds.x += deltaX;
bounds.y += deltaY;
bounds.width += deltaWidth;
bounds.height += deltaHeight;
if (min != null) {
if (bounds.width < min.width) {
int correction = min.width - bounds.width;
if (deltaX != 0) {
bounds.x -= correction;
}
bounds.width = min.width;
}
if (bounds.height < min.height) {
int correction = min.height - bounds.height;
if (deltaY != 0) {
bounds.y -= correction;
}
bounds.height = min.height;
}
}
if (max != null) {
if (bounds.width > max.width) {
int correction = max.width - bounds.width;
if (deltaX != 0) {
bounds.x -= correction;
}
bounds.width = max.width;
}
if (bounds.height > max.height) {
int correction = max.height - bounds.height;
if (deltaY != 0) {
bounds.y -= correction;
}
bounds.height = max.height;
}
}
}
private int getCursor(Window win, MouseEvent e) {
int winWidth = win.getBounds().width;
int winHeight = win.getBounds().height;
Point p = e.getPoint();// e.getLocationOnScreen();
if (win.getBounds().contains(e.getLocationOnScreen())) {
//
if (p.x - CORNER_DRAG_WIDTH < 0 && p.y - CORNER_DRAG_WIDTH < 0) {
return Cursor.NW_RESIZE_CURSOR;
} else if (p.x - (winWidth - CORNER_DRAG_WIDTH) > 0
&& p.y - CORNER_DRAG_WIDTH < 0) {
return Cursor.NE_RESIZE_CURSOR;
} else if (p.x - CORNER_DRAG_WIDTH < 0
&& p.y - (winHeight - CORNER_DRAG_WIDTH) > 0) {
return Cursor.SW_RESIZE_CURSOR;
} else if (p.x - (winWidth - CORNER_DRAG_WIDTH) > 0
&& p.y - (winHeight - CORNER_DRAG_WIDTH) > 0) {
return Cursor.SE_RESIZE_CURSOR;
}
//
if ((p.x > BORDER_DRAG_THICKNESS && p.x < winWidth
- BORDER_DRAG_THICKNESS)
&& (p.y > BORDER_DRAG_THICKNESS && p.y < winHeight
- BORDER_DRAG_THICKNESS)) {
return Cursor.DEFAULT_CURSOR;
} else {
if (p.x - BORDER_DRAG_THICKNESS < 0) {
return Cursor.W_RESIZE_CURSOR;
} else if (p.y - BORDER_DRAG_THICKNESS < 0) {
return Cursor.N_RESIZE_CURSOR;
} else if (winWidth - BORDER_DRAG_THICKNESS > p.x) {
return Cursor.S_RESIZE_CURSOR;
} else {
return Cursor.E_RESIZE_CURSOR;
}
}
}
return Cursor.DEFAULT_CURSOR;
}
}ここでJRoundFrameはJFrameクラスを継承するクラスである.このクラスの構造方法にマウスリスニングを追加すると、マウスのフォームのサイズの変更が可能になります.