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JIDE Common Layer (Professional Swing Components)
/*
* @(#)ResizableMouseInputAdapter.java 3/4/2005
*
* Copyright 2002 - 2005 JIDE Software Inc. All rights reserved.
*/
package com.jidesoft.swing;
import javax.swing.*;
import javax.swing.event.MouseInputAdapter;
import java.awt.*;
import java.awt.event.MouseEvent;
/**
* Mouse input listener to control the resizing of Resizable component.
*/
public class ResizableMouseInputAdapter extends MouseInputAdapter {
/**
* Starting bounds of the dragged component.
*/
private static Rectangle _startingBounds;
/**
* _eventMouseScreenX is the mousePressed location in absolute coordinate system.
*/
private int _eventMouseScreenX;
/**
* _eventMouseScreenY is the mousePressed location in absolute coordinate system.
*/
private int _eventMouseScreenY;
/**
* The resize direction.
*/
private int _resizeCorner;
protected static final int RESIZE_NONE = 0;
private boolean _discardRelease = false;
private Resizable _resizable;
public ResizableMouseInputAdapter(Resizable resizable) {
_resizable = resizable;
}
private boolean isResizable(int resizeDir) {
return _resizable != null && (_resizable.getResizableCorners() & resizeDir) != 0;
}
@Override
public void mousePressed(MouseEvent e) {
_resizeCorner = RESIZE_NONE;
_startingBounds = _resizable.getComponent().getBounds();
if (_resizable.isTopLevel()) {
Point location = new Point(_startingBounds.x, _startingBounds.y);
SwingUtilities.convertPointToScreen(location, _resizable.getComponent());
_startingBounds.x = location.x;
_startingBounds.y = location.y;
}
Point p = new Point(e.getX(), e.getY());
SwingUtilities.convertPointToScreen(p, (Component) e.getSource());
_eventMouseScreenX = p.x;
_eventMouseScreenY = p.y;
if (e.getSource() instanceof Resizable.ResizeCorner) {
Resizable.ResizeCorner corner = (Resizable.ResizeCorner) e.getSource();
_resizeCorner = corner.getCorner();
}
// resize component
else if (e.getSource() == _resizable.getComponent()) {
Insets i = _resizable.getResizeInsets();
if (e.getX() <= i.left) {
if (i.top > 0 && e.getY() < _resizable.getResizeCornerSize() + i.top) {
_resizeCorner = Resizable.UPPER_LEFT;
}
else if (i.bottom > 0 && e.getY() > _resizable.getComponent().getHeight()
- _resizable.getResizeCornerSize() - i.bottom) {
_resizeCorner = Resizable.LOWER_LEFT;
}
else {
_resizeCorner = Resizable.LEFT;
}
}
else if (i.right > 0 && e.getX() >= _resizable.getComponent().getWidth() - i.right) {
if (i.top > 0 && e.getY() < _resizable.getResizeCornerSize() + i.top) {
_resizeCorner = Resizable.UPPER_RIGHT;
}
else if (i.bottom > 0 && e.getY() > _resizable.getComponent().getHeight()
- _resizable.getResizeCornerSize() - i.bottom) {
_resizeCorner = Resizable.LOWER_RIGHT;
}
else {
_resizeCorner = Resizable.RIGHT;
}
}
else if (i.top > 0 && e.getY() <= i.top) {
if (i.left > 0 && e.getX() < _resizable.getResizeCornerSize() + i.left) {
_resizeCorner = Resizable.UPPER_LEFT;
}
else if (i.right > 0 && e.getX() > _resizable.getComponent().getWidth()
- _resizable.getResizeCornerSize() - i.right) {
_resizeCorner = Resizable.UPPER_RIGHT;
}
else {
_resizeCorner = Resizable.UPPER;
}
}
else if (i.bottom > 0 && e.getY() >= _resizable.getComponent().getHeight() - i.bottom) {
if (i.left > 0 && e.getX() < _resizable.getResizeCornerSize() + i.left) {
_resizeCorner = Resizable.LOWER_LEFT;
}
else if (i.right > 0 && e.getX() > _resizable.getComponent().getWidth()
- _resizable.getResizeCornerSize() - i.right) {
_resizeCorner = Resizable.LOWER_RIGHT;
}
else {
_resizeCorner = Resizable.LOWER;
}
}
else {
/* the mouse press happened inside the frame, not in the
border */
_discardRelease = true;
return;
}
}
Cursor s = Cursor.getDefaultCursor();
if (isResizable(_resizeCorner)) {
boolean ltr = _resizable.getComponent().getComponentOrientation().isLeftToRight();
switch (_resizeCorner) {
case Resizable.LOWER:
s = Cursor.getPredefinedCursor(Cursor.S_RESIZE_CURSOR);
break;
case Resizable.UPPER:
s = Cursor.getPredefinedCursor(Cursor.N_RESIZE_CURSOR);
break;
case Resizable.LEFT:
s = Cursor.getPredefinedCursor(ltr ? Cursor.W_RESIZE_CURSOR : Cursor.E_RESIZE_CURSOR);
break;
case Resizable.RIGHT:
s = Cursor.getPredefinedCursor(ltr ? Cursor.E_RESIZE_CURSOR : Cursor.W_RESIZE_CURSOR);
break;
case Resizable.LOWER_RIGHT:
s = Cursor.getPredefinedCursor(ltr ? Cursor.SE_RESIZE_CURSOR : Cursor.SW_RESIZE_CURSOR);
break;
case Resizable.LOWER_LEFT:
s = Cursor.getPredefinedCursor(ltr ? Cursor.SW_RESIZE_CURSOR : Cursor.SE_RESIZE_CURSOR);
break;
case Resizable.UPPER_LEFT:
s = Cursor.getPredefinedCursor(ltr ? Cursor.NW_RESIZE_CURSOR : Cursor.NE_RESIZE_CURSOR);
break;
case Resizable.UPPER_RIGHT:
s = Cursor.getPredefinedCursor(ltr ? Cursor.NE_RESIZE_CURSOR : Cursor.NW_RESIZE_CURSOR);
break;
}
Container c = _resizable.getComponent().getTopLevelAncestor();
if (c instanceof JFrame) {
((JFrame) c).getGlassPane().setVisible(true);
((JFrame) c).getGlassPane().setCursor(s);
}
else if (c instanceof JApplet) {
((JApplet) c).getGlassPane().setVisible(true);
((JApplet) c).getGlassPane().setCursor(s);
}
else if (c instanceof JWindow) {
((JWindow) c).getGlassPane().setVisible(true);
((JWindow) c).getGlassPane().setCursor(s);
}
else if (c instanceof JDialog) {
((JDialog) c).getGlassPane().setVisible(true);
((JDialog) c).getGlassPane().setCursor(s);
}
_resizable.beginResizing(_resizeCorner);
}
else {
_resizeCorner = RESIZE_NONE;
}
}
@Override
public void mouseDragged(MouseEvent e) {
if (_startingBounds == null) {
return;
}
Point p = new Point(e.getX(), e.getY());
Component c = (Component) e.getSource();
SwingUtilities.convertPointToScreen(p, c);
int deltaX = _eventMouseScreenX - p.x;
int deltaY = _eventMouseScreenY - p.y;
Dimension min = _resizable.getComponent().getMinimumSize();
Dimension max = _resizable.getComponent().getMaximumSize();
Point point = new Point(_resizable.getComponent().getX(), _resizable.getComponent().getY());
if (_resizable.isTopLevel()) {
SwingUtilities.convertPointToScreen(point, _resizable.getComponent());
}
int newX = point.x;
int newY = point.y;
int newW;
int newH;
Rectangle parentBounds = _resizable.isTopLevel() ? new Rectangle(Integer.MIN_VALUE, Integer.MIN_VALUE, Integer.MAX_VALUE, Integer.MAX_VALUE)
: _resizable.getComponent().getParent().getBounds();
int actualResizeCorner = _resizeCorner;
boolean ltr = _resizable.getComponent().getComponentOrientation().isLeftToRight();
if (!ltr) {
switch (_resizeCorner) {
case Resizable.UPPER_LEFT:
actualResizeCorner = Resizable.UPPER_RIGHT;
case Resizable.UPPER_RIGHT:
actualResizeCorner = Resizable.UPPER_LEFT;
case Resizable.LOWER_LEFT:
actualResizeCorner = Resizable.LOWER_RIGHT;
case Resizable.LOWER_RIGHT:
actualResizeCorner = Resizable.LOWER_LEFT;
case Resizable.LEFT:
actualResizeCorner = Resizable.RIGHT;
case Resizable.RIGHT:
actualResizeCorner = Resizable.LEFT;
}
}
switch (actualResizeCorner) {
case RESIZE_NONE:
return;
case Resizable.UPPER:
if (_startingBounds.height + deltaY < min.height)
deltaY = -(_startingBounds.height - min.height);
else if (_startingBounds.height + deltaY > max.height)
deltaY = max.height - _startingBounds.height;
// if (_startingBounds.y - deltaY < 0)
// deltaY = _startingBounds.y;
newX = _startingBounds.x;
newY = _startingBounds.y - deltaY;
newW = _startingBounds.width;
newH = _startingBounds.height + deltaY;
// System.out.println("dragging delta " + deltaY + " newH " + newH);
break;
case Resizable.UPPER_RIGHT:
if (_startingBounds.height + deltaY < min.height)
deltaY = -(_startingBounds.height - min.height);
else if (_startingBounds.height + deltaY > max.height)
deltaY = max.height - _startingBounds.height;
// if (_startingBounds.y - deltaY < 0)
// deltaY = _startingBounds.y;
if (_startingBounds.width - deltaX < min.width)
deltaX = _startingBounds.width - min.width;
else if (_startingBounds.width - deltaX > max.width)
deltaX = -(max.width - _startingBounds.width);
if (_startingBounds.x + _startingBounds.width - deltaX > parentBounds.width)
deltaX = _startingBounds.x + _startingBounds.width - parentBounds.width;
newX = _startingBounds.x;
newY = _startingBounds.y - deltaY;
newW = _startingBounds.width - deltaX;
newH = _startingBounds.height + deltaY;
break;
case Resizable.RIGHT:
if (_startingBounds.width - deltaX < min.width)
deltaX = _startingBounds.width - min.width;
else if (_startingBounds.width - deltaX > max.width)
deltaX = -(max.width - _startingBounds.width);
if (_startingBounds.x + _startingBounds.width - deltaX > parentBounds.width)
deltaX = _startingBounds.x + _startingBounds.width - parentBounds.width;
newW = _startingBounds.width - deltaX;
newH = _startingBounds.height;
break;
case Resizable.LOWER_RIGHT:
if (_startingBounds.width - deltaX < min.width)
deltaX = _startingBounds.width - min.width;
else if (_startingBounds.width - deltaX > max.width)
deltaX = -(max.width - _startingBounds.width);
if (_startingBounds.x + _startingBounds.width - deltaX > parentBounds.width)
deltaX = _startingBounds.x + _startingBounds.width - parentBounds.width;
if (_startingBounds.height - deltaY < min.height)
deltaY = _startingBounds.height - min.height;
else if (_startingBounds.height - deltaY > max.height)
deltaY = -(max.height - _startingBounds.height);
if (_startingBounds.y + _startingBounds.height - deltaY > parentBounds.height)
deltaY = _startingBounds.y + _startingBounds.height -
parentBounds.height;
newW = _startingBounds.width - deltaX;
newH = _startingBounds.height - deltaY;
break;
case Resizable.LOWER:
if (_startingBounds.height - deltaY < min.height)
deltaY = _startingBounds.height - min.height;
else if (_startingBounds.height - deltaY > max.height)
deltaY = -(max.height - _startingBounds.height);
if (_startingBounds.y + _startingBounds.height - deltaY > parentBounds.height)
deltaY = _startingBounds.y + _startingBounds.height -
parentBounds.height;
newW = _startingBounds.width;
newH = _startingBounds.height - deltaY;
break;
case Resizable.LOWER_LEFT:
if (_startingBounds.height - deltaY < min.height)
deltaY = _startingBounds.height - min.height;
else if (_startingBounds.height - deltaY > max.height)
deltaY = -(max.height - _startingBounds.height);
if (_startingBounds.y + _startingBounds.height - deltaY > parentBounds.height)
deltaY = _startingBounds.y + _startingBounds.height - parentBounds.height;
if (_startingBounds.width + deltaX < min.width)
deltaX = -(_startingBounds.width - min.width);
else if (_startingBounds.width + deltaX > max.width)
deltaX = max.width - _startingBounds.width;
// if (_startingBounds.x - deltaX < 0) {
// deltaX = _startingBounds.x;
// }
newX = _startingBounds.x - deltaX;
newY = _startingBounds.y;
newW = _startingBounds.width + deltaX;
newH = _startingBounds.height - deltaY;
break;
case Resizable.LEFT:
if (_startingBounds.width + deltaX < min.width)
deltaX = -(_startingBounds.width - min.width);
else if (_startingBounds.width + deltaX > max.width)
deltaX = max.width - _startingBounds.width;
// if (_startingBounds.x - deltaX < 0)
// deltaX = _startingBounds.x;
newX = _startingBounds.x - deltaX;
newY = _startingBounds.y;
newW = _startingBounds.width + deltaX;
newH = _startingBounds.height;
// System.out.println("dragging delta " + deltaX + " newW " + newW);
break;
case Resizable.UPPER_LEFT:
if (_startingBounds.width + deltaX < min.width)
deltaX = -(_startingBounds.width - min.width);
else if (_startingBounds.width + deltaX > max.width)
deltaX = max.width - _startingBounds.width;
// if (_startingBounds.x - deltaX < 0)
// deltaX = _startingBounds.x;
if (_startingBounds.height + deltaY < min.height)
deltaY = -(_startingBounds.height - min.height);
else if (_startingBounds.height + deltaY > max.height)
deltaY = max.height - _startingBounds.height;
// if (_startingBounds.y - deltaY < 0) {
// deltaY = _startingBounds.y;
// }
newX = _startingBounds.x - deltaX;
newY = _startingBounds.y - deltaY;
newW = _startingBounds.width + deltaX;
newH = _startingBounds.height + deltaY;
break;
default:
return;
}
_resizable.resizing(_resizeCorner, newX, newY, newW, newH);
}
@Override
public void mouseReleased(MouseEvent e) {
_startingBounds = null;
if (_discardRelease) {
_discardRelease = false;
return;
}
if (_resizeCorner != RESIZE_NONE) {
Container c = _resizable.getComponent().getTopLevelAncestor();
if (c instanceof JFrame) {
((JFrame) _resizable.getComponent().getTopLevelAncestor()).getGlassPane().setCursor(Cursor.getDefaultCursor());
((JFrame) _resizable.getComponent().getTopLevelAncestor()).getGlassPane().setVisible(false);
}
else if (c instanceof JApplet) {
((JApplet) c).getGlassPane().setCursor(Cursor.getDefaultCursor());
((JApplet) c).getGlassPane().setVisible(false);
}
else if (c instanceof JWindow) {
((JWindow) c).getGlassPane().setCursor(Cursor.getDefaultCursor());
((JWindow) c).getGlassPane().setVisible(false);
}
else if (c instanceof JDialog) {
((JDialog) c).getGlassPane().setCursor(Cursor.getDefaultCursor());
((JDialog) c).getGlassPane().setVisible(false);
}
_resizable.endResizing(_resizeCorner);
_eventMouseScreenX = 0;
_eventMouseScreenY = 0;
_startingBounds = null;
_resizeCorner = RESIZE_NONE;
}
}
/**
* mouseMoved is for resize only. When mouse moves over borders and corners, it will change to different cursor to
* indicate it's resizable.
*
* @param e mouse event
*/
@Override
public void mouseMoved(MouseEvent e) {
if (e.getSource() instanceof Resizable.ResizeCorner) {
Resizable.ResizeCorner corner = (Resizable.ResizeCorner) e.getSource();
boolean ltr = corner.getComponentOrientation().isLeftToRight();
switch (corner.getCorner()) {
case Resizable.LOWER_RIGHT:
corner.setCursor(Cursor.getPredefinedCursor(ltr ? Cursor.SE_RESIZE_CURSOR : Cursor.SW_RESIZE_CURSOR));
return;
case Resizable.UPPER_RIGHT:
corner.setCursor(Cursor.getPredefinedCursor(ltr ? Cursor.NE_RESIZE_CURSOR : Cursor.NW_RESIZE_CURSOR));
return;
case Resizable.LOWER_LEFT:
corner.setCursor(Cursor.getPredefinedCursor(ltr ? Cursor.SW_RESIZE_CURSOR : Cursor.SE_RESIZE_CURSOR));
return;
case Resizable.UPPER_LEFT:
corner.setCursor(Cursor.getPredefinedCursor(ltr ? Cursor.NW_RESIZE_CURSOR : Cursor.NE_RESIZE_CURSOR));
return;
}
}
else if (e.getSource() == _resizable.getComponent()) {
Insets i = _resizable.getResizeInsets();
boolean ltr = _resizable.getComponent().getComponentOrientation().isLeftToRight();
if (e.getX() <= i.left) {
if (isResizable(Resizable.UPPER_LEFT) && i.top > 0 && e.getY() < _resizable.getResizeCornerSize() + i.top)
_resizable.getComponent().setCursor(Cursor.getPredefinedCursor(ltr ? Cursor.NW_RESIZE_CURSOR : Cursor.NE_RESIZE_CURSOR));
else if (isResizable(Resizable.LOWER_LEFT) && i.bottom > 0 && e.getY() > _resizable.getComponent().getHeight() - _resizable.getResizeCornerSize() - i.bottom)
_resizable.getComponent().setCursor(Cursor.getPredefinedCursor(ltr ? Cursor.SW_RESIZE_CURSOR : Cursor.SE_RESIZE_CURSOR));
else if (isResizable(Resizable.LEFT))
_resizable.getComponent().setCursor(Cursor.getPredefinedCursor(ltr ? Cursor.W_RESIZE_CURSOR : Cursor.E_RESIZE_CURSOR));
else
_resizable.getComponent().setCursor(Cursor.getDefaultCursor());
}
else if (e.getX() >= _resizable.getComponent().getWidth() - i.right) {
if (isResizable(Resizable.UPPER_RIGHT) && i.top > 0 && e.getY() < _resizable.getResizeCornerSize() + i.top)
_resizable.getComponent().setCursor(Cursor.getPredefinedCursor(ltr ? Cursor.NE_RESIZE_CURSOR : Cursor.NW_RESIZE_CURSOR));
else if (isResizable(Resizable.LOWER_LEFT) && i.bottom > 0 && e.getY() > _resizable.getComponent().getHeight() - _resizable.getResizeCornerSize() - i.bottom)
_resizable.getComponent().setCursor(Cursor.getPredefinedCursor(ltr ? Cursor.SE_RESIZE_CURSOR : Cursor.SW_RESIZE_CURSOR));
else if (isResizable(Resizable.RIGHT))
_resizable.getComponent().setCursor(Cursor.getPredefinedCursor(ltr ? Cursor.E_RESIZE_CURSOR : Cursor.W_RESIZE_CURSOR));
else
_resizable.getComponent().setCursor(Cursor.getDefaultCursor());
}
else if (e.getY() <= i.top) {
if (isResizable(Resizable.UPPER_LEFT) && i.left > 0 && e.getX() < _resizable.getResizeCornerSize() + i.left)
_resizable.getComponent().setCursor(Cursor.getPredefinedCursor(ltr ? Cursor.NW_RESIZE_CURSOR : Cursor.NE_RESIZE_CURSOR));
else if (isResizable(Resizable.UPPER_RIGHT) && i.right > 0 && e.getX() > _resizable.getComponent().getWidth() - _resizable.getResizeCornerSize() - i.right)
_resizable.getComponent().setCursor(Cursor.getPredefinedCursor(ltr ? Cursor.NE_RESIZE_CURSOR : Cursor.NW_RESIZE_CURSOR));
else if (isResizable(Resizable.UPPER))
_resizable.getComponent().setCursor(Cursor.getPredefinedCursor(Cursor.N_RESIZE_CURSOR));
else
_resizable.getComponent().setCursor(Cursor.getDefaultCursor());
}
else if (e.getY() >= _resizable.getComponent().getHeight() - i.bottom) {
if (isResizable(Resizable.LOWER_LEFT) && i.left > 0 && e.getX() < _resizable.getResizeCornerSize() + i.left)
_resizable.getComponent().setCursor(Cursor.getPredefinedCursor(ltr ? Cursor.SW_RESIZE_CURSOR : Cursor.SE_RESIZE_CURSOR));
else if (isResizable(Resizable.LOWER_RIGHT) && i.right > 0 && e.getX() > _resizable.getComponent().getWidth() - _resizable.getResizeCornerSize() - i.right)
_resizable.getComponent().setCursor(Cursor.getPredefinedCursor(ltr ? Cursor.SE_RESIZE_CURSOR : Cursor.SW_RESIZE_CURSOR));
else if (isResizable(Resizable.LOWER))
_resizable.getComponent().setCursor(Cursor.getPredefinedCursor(Cursor.S_RESIZE_CURSOR));
else
_resizable.getComponent().setCursor(Cursor.getDefaultCursor());
}
else
_resizable.getComponent().setCursor(Cursor.getDefaultCursor());
return;
}
_resizable.getComponent().setCursor(Cursor.getDefaultCursor());
}
// implements java.awt.event.MouseListener
@Override
public void mouseExited(MouseEvent e) {
if (e.getSource() instanceof Resizable.ResizeCorner) {
Resizable.ResizeCorner corner = (Resizable.ResizeCorner) e.getSource();
corner.setCursor(Cursor.getDefaultCursor());
}
else {
_resizable.getComponent().setCursor(Cursor.getDefaultCursor());
}
}
}
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