* THE PROBLEM *
In GlassApplication.cpp, the GDK_FOCUS_CHANGE event gets called from the last
window to the first on my setup (I suspect "out-of-order" on some setups and
even occasionally in the expected order). So the code to keep the latest
enabled window fails (refering to WindowStage.java activeWindows) - that's why
the "First Window" (on the code to reproduce the bug report) shows on top -
because openjfx thinks it was the latest window. In WindowStage.java:
final void handleFocusDisabled() {
if (activeWindows.isEmpty()) {
return;
}
WindowStage window = activeWindows.get(activeWindows.size() - 1); //<--
HERE!!
window.setIconified(false);
window.requestToFront();
window.requestFocus();
}
When there is a WINDOW_MODAL this code gets called because the modal window
disable it's parents (so they do not get events - it's correct). So openjfx
brings up what it thinks it's the latest window - but since the out of order
GDK_FOCUS_CHANGE - it's the wrong window (activeWindows list has not the
correct order).
The Gtk docs states GDK_FOCUS_CHANGE is true "if the window has gained the
keyboard focus" which may not be directly correlated to openjfx's
WindowEvent.FOCUS_GAINED.
* THE FIX *
To fix this, WindowEvent.FOCUS_GAINED must be called in order of which window
is shown (because the window is inserted on activeWindows at this event).
So I have modified glass_window.cpp to immediately call
WindowEvent.FOCUS_GAINED when showing the window:
void WindowContextBase::set_visible(bool visible) {
if (visible) {
gtk_widget_show_all(gtk_widget);
//JDK-8220272 - fire event first because GDK_FOCUS_CHANGE is not always
in order
if(jwindow && isEnabled()) {
mainEnv->CallVoidMethod(jwindow, jWindowNotifyFocus,
com_sun_glass_events_WindowEvent_FOCUS_GAINED);
}
} else {
gtk_widget_hide(gtk_widget);
if (jview && is_mouse_entered) {
is_mouse_entered = false;
mainEnv->CallVoidMethod(jview, jViewNotifyMouse,
com_sun_glass_events_MouseEvent_EXIT,
com_sun_glass_events_MouseEvent_BUTTON_NONE,
0, 0,
0, 0,
0,
JNI_FALSE,
JNI_FALSE);
CHECK_JNI_EXCEPTION(mainEnv)
}
}
}
Did some tests and it seems to fix the problem.
I do not have permission to make a PR, so posting the fix here. Will happily do
the PR if required.
Thanks.
