afb81b8278
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42 lines
844 B
C++
42 lines
844 B
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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#pragma once
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namespace Ui {
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class FocusPersister {
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public:
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FocusPersister(QWidget *parent, QWidget *steal = nullptr)
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: _weak(GrabFocused(parent)) {
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if (steal) {
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steal->setFocus();
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}
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}
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~FocusPersister() {
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if (auto strong = _weak.data()) {
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if (auto window = strong->window()) {
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if (window->focusWidget() != strong) {
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strong->setFocus();
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}
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}
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}
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}
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private:
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static QWidget *GrabFocused(QWidget *parent) {
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if (auto window = parent ? parent->window() : nullptr) {
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return window->focusWidget();
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}
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return nullptr;
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}
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QPointer<QWidget> _weak;
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};
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} // namespace Ui
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