void tgrid::reduce_width(const unsigned maximum_width)
{
/***** ***** ***** ***** INIT ***** ***** ***** *****/
log_scope2(log_gui_layout, LOG_SCOPE_HEADER);
DBG_GUI_L << LOG_HEADER << " maximum width " << maximum_width << ".\n";
tpoint size = get_best_size();
if(size.x <= static_cast<int>(maximum_width)) {
DBG_GUI_L << LOG_HEADER << " Already fits.\n";
return;
}
/***** ***** ***** ***** Request resize ***** ***** ***** *****/
request_reduce_width(maximum_width);
size = get_best_size();
if(size.x <= static_cast<int>(maximum_width)) {
DBG_GUI_L << LOG_HEADER << " Resize request honored.\n";
return;
}
/***** ***** ***** ***** Demand resize ***** ***** ***** *****/
/** @todo Implement. */
/***** ***** ***** ***** Acknowlegde failure ***** ***** ***** *****/
DBG_GUI_L << LOG_HEADER << " Resizing failed.\n";
throw tlayout_exception_width_resize_failed();
}
void grid::request_placement(dispatcher&, const event::ui_event, bool& handled, bool&)
{
if (get_window()->invalidate_layout_blocked()) {
handled = true;
return;
}
point size = get_size();
point best_size = calculate_best_size();
if(size.x >= best_size.x && size.y >= best_size.y) {
place(get_origin(), size);
handled = true;
return;
}
recalculate_best_size();
if(size.y >= best_size.y) {
// We have enough space in the Y direction, but not in the X direction.
// Try wrapping the content.
request_reduce_width(size.x);
best_size = get_best_size();
if(size.x >= best_size.x && size.y >= best_size.y) {
// Wrapping succeeded, we still fit vertically.
place(get_origin(), size);
handled = true;
return;
} else {
// Wrapping failed, we no longer fit.
// Reset the sizes of child widgets.
layout_initialize(true);
}
}
/*
Not enough space.
Let the event flow higher up.
This is a pre-event handler, so the event flows upwards. */
}
