public void mouseWheelMoved(MouseWheelEvent e) {
if (enabled && !readOnly) {
if (timer != null && timer.isRunning()) {
timer.stop();
}
if (enableMouseWheel) {
int count = 1;
MouseWheelEvent e2;
long lastEventTime = e.getWhen();
int steps = 0;
int r;
// This cycle is to determine multiple clicks like double wheel, triple wheel event etc.
// We go through the vector of events and check whether there are events corresponding to
// multiple events.
for (int i = 0; i < events.size() && events.get(i) instanceof MouseWheelEvent; i++) {
e2 = (MouseWheelEvent) events.get(i);
// The events are considered to be a multiple click when:
// 1. Coordinates are equal
// 2. Modifiers are equal
// 3. Both events are wheel up or down
// 4. Delay between two subsequent clicks is lower than given number of miliseconds
r = e2.getWheelRotation();
if (e2.getX() == e.getX()
&& e2.getY() == e.getY()
&& e2.getModifiers() == e.getModifiers()
&& (lastEventTime - e2.getWhen() < mouseMultiDelay)
&& e2.getID() == e.getID()
&& ((r > 0 && e.getWheelRotation() > 0) || (r < 0 && e.getWheelRotation() < 0))) {
count++;
lastEventTime = e2.getWhen();
steps += Math.abs(r);
} else {
break;
}
}
steps += Math.abs(e.getWheelRotation());
// Generate the command string
String s =
"Mouse "
+ (e.getWheelRotation() > 0
? MouseCommand.MOUSE_WHEEL_DOWN
: MouseCommand.MOUSE_WHEEL_UP);
// Insert modifiers if there are any
String modifiers = parser.modifiersToString(e.getModifiers());
if (modifiers.length() > 0) {
s += " " + MouseCommand.PARAM_MODIFIER + "=" + modifiers;
}
// Generate the count parameter
if (count > 1) {
s += " " + MouseCommand.PARAM_COUNT + "=" + Math.abs(steps);
}
// This will determine whether this event is preceded by a mouse move command with the same
// coordinates.
// It will be replaced if yes.
boolean replaceLastMove = false;
if (enableMouseMoves) {
if (events.size() > 0 && events.get(events.size() - 1) instanceof MouseEvent) {
MouseEvent me = (MouseEvent) events.get(events.size() - 1);
if (me.getID() == MouseEvent.MOUSE_MOVED
&& e.getX() == me.getX()
&& e.getY() == me.getY()) {
replaceLastMove = true;
}
}
}
// Generate coordinates
s += " " + MouseCommand.PARAM_TO + "=" + parser.pointToString(e.getPoint());
// Insert the command to the current editor
insertLine(s, count > 1 || replaceLastMove, true, false);
dragInProgress = false;
}
insertEvent(e);
}
}
private MouseEvent transformMouseEvent(MouseEvent event) {
if (event == null) {
throw new IllegalArgumentException("MouseEvent is null");
}
MouseEvent newEvent;
if (event instanceof MouseWheelEvent) {
MouseWheelEvent mouseWheelEvent = (MouseWheelEvent) event;
newEvent =
new MouseWheelEvent(
mouseWheelEvent.getComponent(),
mouseWheelEvent.getID(),
mouseWheelEvent.getWhen(),
mouseWheelEvent.getModifiers(),
mouseWheelEvent.getX(),
mouseWheelEvent.getY(),
mouseWheelEvent.getClickCount(),
mouseWheelEvent.isPopupTrigger(),
mouseWheelEvent.getScrollType(),
mouseWheelEvent.getScrollAmount(),
mouseWheelEvent.getWheelRotation());
} else {
newEvent =
new MouseEvent(
event.getComponent(),
event.getID(),
event.getWhen(),
event.getModifiers(),
event.getX(),
event.getY(),
event.getClickCount(),
event.isPopupTrigger(),
event.getButton());
}
if (view != null && at.getDeterminant() != 0) {
Rectangle viewBounds = getTransformedSize();
Insets insets = JXTransformer.this.getInsets();
int xgap = (getWidth() - (viewBounds.width + insets.left + insets.right)) / 2;
int ygap = (getHeight() - (viewBounds.height + insets.top + insets.bottom)) / 2;
double x = newEvent.getX() + viewBounds.getX() - insets.left;
double y = newEvent.getY() + viewBounds.getY() - insets.top;
Point2D p = new Point2D.Double(x - xgap, y - ygap);
Point2D tp;
try {
tp = at.inverseTransform(p, null);
} catch (NoninvertibleTransformException ex) {
// can't happen, we check it before
throw new AssertionError("NoninvertibleTransformException");
}
// Use transformed coordinates to get the current component
mouseCurrentComponent =
SwingUtilities.getDeepestComponentAt(view, (int) tp.getX(), (int) tp.getY());
if (mouseCurrentComponent == null) {
mouseCurrentComponent = JXTransformer.this;
}
Component tempComponent = mouseCurrentComponent;
if (mouseDraggedComponent != null) {
tempComponent = mouseDraggedComponent;
}
Point point =
SwingUtilities.convertPoint(view, (int) tp.getX(), (int) tp.getY(), tempComponent);
newEvent.setSource(tempComponent);
newEvent.translatePoint(point.x - event.getX(), point.y - event.getY());
}
return newEvent;
}
/**
* Zoom in and out, trying to preserve the point of the image that was under the mouse cursor at
* the same place
*/
public void mouseWheelMoved(MouseWheelEvent e) {
File file;
Image image;
Rectangle visibleRect;
synchronized (ImageDisplay.this) {
file = ImageDisplay.this.file;
image = ImageDisplay.this.image;
visibleRect = ImageDisplay.this.visibleRect;
}
mouseIsDragging = false;
selectedRect = null;
if (image == null) return;
// Calculate the mouse cursor position in image coordinates, so that we can center the zoom
// on that mouse position.
// To avoid issues when the user tries to zoom in on the image borders, this point is not
// calculated
// again if there was less than 1.5seconds since the last event.
if (e.getWhen() - lastTimeForMousePoint > 1500 || mousePointInImg == null) {
lastTimeForMousePoint = e.getWhen();
mousePointInImg = comp2imgCoord(visibleRect, e.getX(), e.getY());
}
// Applicate the zoom to the visible rectangle in image coordinates
if (e.getWheelRotation() > 0) {
visibleRect.width = visibleRect.width * 3 / 2;
visibleRect.height = visibleRect.height * 3 / 2;
} else {
visibleRect.width = visibleRect.width * 2 / 3;
visibleRect.height = visibleRect.height * 2 / 3;
}
// Check that the zoom doesn't exceed 2:1
if (visibleRect.width < getSize().width / 2) {
visibleRect.width = getSize().width / 2;
}
if (visibleRect.height < getSize().height / 2) {
visibleRect.height = getSize().height / 2;
}
// Set the same ratio for the visible rectangle and the display area
int hFact = visibleRect.height * getSize().width;
int wFact = visibleRect.width * getSize().height;
if (hFact > wFact) {
visibleRect.width = hFact / getSize().height;
} else {
visibleRect.height = wFact / getSize().width;
}
// The size of the visible rectangle is limited by the image size.
checkVisibleRectSize(image, visibleRect);
// Set the position of the visible rectangle, so that the mouse cursor doesn't move on the
// image.
Rectangle drawRect = calculateDrawImageRectangle(visibleRect);
visibleRect.x =
mousePointInImg.x + ((drawRect.x - e.getX()) * visibleRect.width) / drawRect.width;
visibleRect.y =
mousePointInImg.y + ((drawRect.y - e.getY()) * visibleRect.height) / drawRect.height;
// The position is also limited by the image size
checkVisibleRectPos(image, visibleRect);
synchronized (ImageDisplay.this) {
if (ImageDisplay.this.file == file) {
ImageDisplay.this.visibleRect = visibleRect;
}
}
ImageDisplay.this.repaint();
}