public void hook(IWidget widget) {
final Display display = widget.getDisplay();
if (this.display != null && this.display != display) {
throw new IllegalArgumentException("Widget needs to be on same display");
} else {
if (display == null) {
throw new IllegalArgumentException("Widget needs to be in the widgettree.");
}
this.display = display;
this.widget = widget;
display.addGlobalEventListener(listener);
}
}
/**
* Make this window draggable or not
*
* @param b whether the window should be movable with the mouse or not
*/
public void setMovable(boolean b) {
if (!b) {
if (moveDnDListener != null) {
Display d = getDisplay();
if (d == null)
throw new IllegalStateException("Uh, sorry, the window has to be in the widget tree");
d.removeDndListener(moveDnDListener);
}
} else {
if (moveDnDListener == null) {
Display d = getDisplay();
if (d == null)
throw new IllegalStateException("Uh, sorry, the window has to be in the widget tree");
moveDnDListener = new WindowMoveDnDListenerImpl();
d.addDndListener(moveDnDListener);
}
}
}
public void unHook(IWidget widget) {
if (display != null) {
if (widget == this.widget) {
display.removeGlobalEventListener(listener);
display = null;
this.widget = null;
} else {
throw new IllegalArgumentException("needs to be the hooked widget.");
}
} else {
throw new IllegalStateException("first you need to hook onto a widget.");
}
}
/**
* Make this window resizable with the mouse or not.
*
* @param b flag whether the window shall be resizable or not
*/
public void setResizable(boolean b) {
if (!b) {
if (resizeDnDListener != null) {
Display d = getDisplay();
if (d == null)
throw new IllegalStateException(
"Uh, sorry, the window has to be in the widget tree if you want to disable resizing :)");
d.removeDndListener(resizeDnDListener);
resizeDnDListener = null;
}
} else {
if (resizeDnDListener == null) {
Display d = getDisplay();
if (d == null)
throw new IllegalStateException(
"Uh, sorry, the window has to be in the widget tree if you want to enable resizing :)");
d.removeDndListener(
resizeDnDListener); // first remove old instance (in case of two subsequent
// setResizable(true) calls)
resizeDnDListener = new WindowResizeDnDListenerImpl();
d.addDndListener(resizeDnDListener);
}
}
}