void display_setup(void)
{
screen_window = HeapAllocPtr(sizeof(WINDOW));
WinOpen(screen_window, MakeWinRect(10, 10, 106, 74), WF_SAVE_SCR | WF_TTY | WF_ROUNDEDBORDER | WF_TITLE, "TI-83+ Emulator");
WinActivate(screen_window);
return;
}
ResultType WinGroup::Activate(bool aStartWithMostRecent, WindowSpec *aWinSpec, Label **aJumpToLabel)
{
if (aJumpToLabel) // Initialize early in case of early return.
*aJumpToLabel = NULL;
if (IsEmpty())
return OK; // OK since this is the expected behavior in this case.
// Otherwise:
if (!Update(true)) // Update our private member vars.
return FAIL; // It already displayed the error for us.
WindowSpec *win, *win_to_activate_next = aWinSpec;
bool group_is_active = false; // Set default.
HWND activate_win, active_window = GetForegroundWindow(); // This value is used in more than one place.
if (win_to_activate_next)
{
// The caller told us which WindowSpec to start off trying to activate.
// If the foreground window matches that WindowSpec, do nothing except
// marking it as visited, because we want to stay on this window under
// the assumption that it was newly revealed due to a window on top
// of it having just been closed:
if (win_to_activate_next == IsMember(active_window, *g))
{
group_is_active = true;
MarkAsVisited(active_window);
return OK;
}
// else don't mark as visited even if it's a member of the group because
// we're about to attempt to activate a different window: the next
// unvisited member of this same WindowSpec. If the below doesn't
// find any of those, it continue on through the list normally.
}
else // Caller didn't tell us which, so determine it.
{
if (win_to_activate_next = IsMember(active_window, *g)) // Foreground window is a member of this group.
{
// Set it to activate this same WindowSpec again in case there's
// more than one that matches (e.g. multiple notepads). But first,
// mark the current window as having been visited if it hasn't
// already by marked by a prior iteration. Update: This method
// doesn't work because if a unvisted matching window became the
// foreground window by means other than using GroupActivate
// (e.g. launching a new instance of the app: now there's another
// matching window in the foreground). So just call it straight
// out. It has built-in dupe-checking which should prevent the
// list from filling up with dupes if there are any special
// situations in which that might otherwise happen:
//if (!sAlreadyVisitedCount)
group_is_active = true;
MarkAsVisited(active_window);
}
else // It's not a member.
{
win_to_activate_next = mFirstWindow; // We're starting fresh, so start at the first window.
// Reset the list of visited windows:
sAlreadyVisitedCount = 0;
}
}
// Activate any unvisited window that matches the win_to_activate_next spec.
// If none, activate the next window spec in the series that does have an
// existing window:
// If the spec we're starting at already has some windows marked as visited,
// set this variable so that we know to retry the first spec again in case
// a full circuit is made through the window specs without finding a window
// to activate. Note: Using >1 vs. >0 might protect against any infinite-loop
// conditions that may be lurking:
bool retry_starting_win_spec = (sAlreadyVisitedCount > 1);
bool retry_is_in_effect = false;
for (win = win_to_activate_next;;)
{
// Call this in the mode to find the last match, which makes things nicer
// because when the sequence wraps around to the beginning, the windows will
// occur in the same order that they did the first time, rather than going
// backwards through the sequence (which is counterintuitive for the user):
if ( activate_win = WinActivate(*g, win->mTitle, win->mText, win->mExcludeTitle, win->mExcludeText
// This next line is whether to find last or first match. We always find the oldest
// (bottommost) match except when the user has specifically asked to start with the
// most recent. But it only makes sense to start with the most recent if the
// group isn't currently active (i.e. we're starting fresh), because otherwise
// windows would be activated in an order different from what was already shown
// the first time through the enumeration, which doesn't seem to be ever desirable:
, !aStartWithMostRecent || group_is_active
, sAlreadyVisited, sAlreadyVisitedCount) )
{
// We found a window to activate, so we're done.
// Probably best to do this before WinDelay in case another hotkey fires during the delay:
MarkAsVisited(activate_win);
DoWinDelay;
//MsgBox(win->mText, 0, win->mTitle);
break;
}
// Otherwise, no window was found to activate.
if (retry_is_in_effect)
// This was the final attempt because we've already gone all the
// way around the circular linked list of WindowSpecs. This check
// must be done, otherwise an infinite loop might result if the windows
// that formed the basis for determining the value of
// retry_starting_win_spec have since been destroyed:
break;
// Otherwise, go onto the next one in the group:
win = win->mNextWindow;
// Even if the above didn't change the value of <win> (because there's only
// one WinSpec in the list), it's still correct to reset this count because
// we want to start the fresh again after all the windows have been
// visited. Note: The only purpose of sAlreadyVisitedCount as used by
// this function is to indicate which windows in a given WindowSpec have
// been visited, not which windows altogether (i.e. it's not necessary to
// remember which windows have been visited once we move on to a new
// WindowSpec).
sAlreadyVisitedCount = 0;
if (win == win_to_activate_next)
{
// We've made one full circuit of the circular linked list without
// finding an existing window to activate. At this point, the user
// has pressed a hotkey to do a GroupActivate, but nothing has happened
// yet. We always want something to happen unless there's absolutely
// no existing windows to activate, or there's only a single window in
// the system that matches the group and it's already active.
if (retry_starting_win_spec)
{
// Mark the foreground window as visited so that it won't be
// mistakenly activated again by the next iteration:
MarkAsVisited(active_window);
retry_is_in_effect = true;
// Now continue with the next iteration of the loop so that it
// will activate a different instance of this WindowSpec rather
// than getting stuck on this one.
}
else
{
if (aJumpToLabel && mJumpToLabel)
{
// Caller asked us to return in this case, so that it can
// use this value to execute a user-specified Gosub:
*aJumpToLabel = mJumpToLabel; // Set output param for the caller.
}
return FAIL; // Let GroupActivate set ErrorLevel to indicate what happened.
}
}
}
return OK;
}
