init

Telegram/SourceFiles/window/window_history_hider.cpp

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+/*
+This file is part of Telegram Desktop,
+the official desktop application for the Telegram messaging service.
+
+For license and copyright information please follow this link:
+https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
+*/
+#include "window/window_history_hider.h"
+
+#include "lang/lang_keys.h"
+#include "ui/widgets/buttons.h"
+#include "ui/widgets/shadow.h"
+#include "ui/cached_round_corners.h"
+#include "mainwidget.h"
+#include "styles/style_layers.h"
+#include "styles/style_chat.h"
+
+namespace Window {
+
+HistoryHider::HistoryHider(QWidget *parent, const QString &text)
+: RpWidget(parent)
+, _text(text) {
+	Lang::Updated(
+	) | rpl::on_next([=] {
+		refreshLang();
+	}, lifetime());
+
+	_chooseWidth = st::historyForwardChooseFont->width(_text);
+
+	resizeEvent(0);
+	_a_opacity.start([=] { update(); }, 0., 1., st::boxDuration);
+}
+
+HistoryHider::~HistoryHider() = default;
+
+void HistoryHider::refreshLang() {
+	InvokeQueued(this, [this] { updateControlsGeometry(); });
+}
+
+void HistoryHider::paintEvent(QPaintEvent *e) {
+	auto p = QPainter(this);
+	auto opacity = _a_opacity.value(_hiding ? 0. : 1.);
+	if (opacity == 0.) {
+		if (_hiding) {
+			_hidden.fire({});
+		}
+		return;
+	}
+
+	p.setOpacity(opacity);
+	p.fillRect(rect(), st::layerBg);
+	p.setFont(st::historyForwardChooseFont);
+	auto w = st::historyForwardChooseMargins.left() + _chooseWidth + st::historyForwardChooseMargins.right();
+	auto h = st::historyForwardChooseMargins.top() + st::historyForwardChooseFont->height + st::historyForwardChooseMargins.bottom();
+	Ui::FillRoundRect(p, (width() - w) / 2, (height() - h) / 2, w, h, st::historyForwardChooseBg, Ui::ForwardCorners);
+
+	p.setPen(st::historyForwardChooseFg);
+	p.drawText(_box, _text, QTextOption(style::al_center));
+}
+
+void HistoryHider::keyPressEvent(QKeyEvent *e) {
+	if (e->key() == Qt::Key_Escape) {
+		startHide();
+	}
+}
+
+void HistoryHider::mousePressEvent(QMouseEvent *e) {
+	if (e->button() == Qt::LeftButton) {
+		if (!_box.contains(e->pos())) {
+			startHide();
+		}
+	}
+}
+
+void HistoryHider::startHide() {
+	if (_hiding) return;
+
+	_hiding = true;
+	_a_opacity.start([=] { animationCallback(); }, 1., 0., st::boxDuration);
+}
+
+void HistoryHider::animationCallback() {
+	update();
+	if (!_a_opacity.animating() && _hiding) {
+		crl::on_main(this, [=] { _hidden.fire({}); });
+	}
+}
+
+rpl::producer<> HistoryHider::hidden() const {
+	return _hidden.events();
+}
+
+void HistoryHider::resizeEvent(QResizeEvent *e) {
+	updateControlsGeometry();
+}
+
+void HistoryHider::updateControlsGeometry() {
+	auto w = st::boxWidth;
+	auto h = st::boxPadding.top() + st::boxPadding.bottom();
+	h += st::historyForwardChooseFont->height;
+	_box = QRect((width() - w) / 2, (height() - h) / 2, w, h);
+}
+
+} // namespace Window