afb81b8278
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52 lines
1.3 KiB
C++
52 lines
1.3 KiB
C++
// This file is part of Desktop App Toolkit,
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// a set of libraries for developing nice desktop applications.
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//
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// For license and copyright information please follow this link:
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// https://github.com/desktop-app/legal/blob/master/LEGAL
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//
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#include "base/qt/qt_tab_key.h"
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#include "base/event_filter.h"
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#include <QApplication>
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#include <QKeyEvent>
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#include <QWidget>
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namespace base {
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bool FocusNextPrevChildBlocked(not_null<QWidget*> widget, bool next) {
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const auto skip = [&](QWidget *w) {
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return next ? w->nextInFocusChain() : w->previousInFocusChain();
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};
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const auto focused = QApplication::focusWidget();
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const auto start = focused ? focused : widget.get();
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auto w = skip(start);
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while (w && w != start) {
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if ((w->focusPolicy() & Qt::TabFocus) && widget->isAncestorOf(w)) {
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break;
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}
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w = skip(w);
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}
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if (w && w != start) {
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w->setFocus(next ? Qt::TabFocusReason : Qt::BacktabFocusReason);
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}
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return true;
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}
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void DisableTabKey(QWidget *widget) {
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if (!widget) {
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return;
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}
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install_event_filter(widget, [=](not_null<QEvent*> e) {
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if (e->type() == QEvent::KeyPress) {
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const auto key = static_cast<QKeyEvent*>(e.get())->key();
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if ((key == Qt::Key_Tab) || (key == Qt::Key_Backtab)) {
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return base::EventFilterResult::Cancel;
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}
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}
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return base::EventFilterResult::Continue;
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});
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}
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} // namespace base
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