init

Telegram/SourceFiles/profile/profile_cover_drop_area.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 "profile/profile_cover_drop_area.h"
+
+#include "ui/ui_utility.h"
+#include "styles/style_profile.h"
+
+namespace Profile {
+
+CoverDropArea::CoverDropArea(
+	QWidget *parent,
+	const QString &title,
+	const QString &subtitle)
+: RpWidget(parent)
+, _title(title)
+, _subtitle(subtitle)
+, _titleWidth(st::profileDropAreaTitleFont->width(_title))
+, _subtitleWidth(st::profileDropAreaSubtitleFont->width(_subtitle)) {
+}
+
+void CoverDropArea::showAnimated() {
+	show();
+	_hiding = false;
+	setupAnimation();
+}
+
+void CoverDropArea::hideAnimated(HideFinishCallback &&callback) {
+	_hideFinishCallback = std::move(callback);
+	_hiding = true;
+	setupAnimation();
+}
+
+void CoverDropArea::paintEvent(QPaintEvent *e) {
+	auto p = QPainter(this);
+
+	if (_a_appearance.animating()) {
+		p.setOpacity(_a_appearance.value(_hiding ? 0. : 1.));
+		p.drawPixmap(0, 0, _cache);
+		return;
+	}
+
+	if (!_cache.isNull()) {
+		_cache = QPixmap();
+		if (_hiding) {
+			hide();
+			if (_hideFinishCallback) {
+				_hideFinishCallback(this);
+			}
+			return;
+		}
+	}
+
+	p.fillRect(e->rect(), st::profileDropAreaBg);
+
+	if (width() < st::profileDropAreaPadding.left() + st::profileDropAreaPadding.right()) return;
+	if (height() < st::profileDropAreaPadding.top() + st::profileDropAreaPadding.bottom()) return;
+
+	auto border = st::profileDropAreaBorderWidth;
+	auto &borderFg = st::profileDropAreaBorderFg;
+	auto inner = rect().marginsRemoved(st::profileDropAreaPadding);
+	p.fillRect(inner.x(), inner.y(), inner.width(), border, borderFg);
+	p.fillRect(inner.x(), inner.y() + inner.height() - border, inner.width(), border, borderFg);
+	p.fillRect(inner.x(), inner.y() + border, border, inner.height() - 2 * border, borderFg);
+	p.fillRect(inner.x() + inner.width() - border, inner.y() + border, border, inner.height() - 2 * border, borderFg);
+
+	int titleLeft = inner.x() + (inner.width() - _titleWidth) / 2;
+	int titleTop = inner.y() + st::profileDropAreaTitleTop + st::profileDropAreaTitleFont->ascent;
+	p.setFont(st::profileDropAreaTitleFont);
+	p.setPen(st::profileDropAreaFg);
+	p.drawText(titleLeft, titleTop, _title);
+
+	int subtitleLeft = inner.x() + (inner.width() - _subtitleWidth) / 2;
+	int subtitleTop = inner.y() + st::profileDropAreaSubtitleTop + st::profileDropAreaSubtitleFont->ascent;
+	p.setFont(st::profileDropAreaSubtitleFont);
+	p.setPen(st::profileDropAreaFg);
+	p.drawText(subtitleLeft, subtitleTop, _subtitle);
+}
+
+void CoverDropArea::setupAnimation() {
+	if (_cache.isNull()) {
+		_cache = Ui::GrabWidget(this);
+	}
+	auto from = _hiding ? 1. : 0., to = _hiding ? 0. : 1.;
+	_a_appearance.start(
+		[=] { update(); },
+		from,
+		to,
+		st::profileDropAreaDuration);
+}
+
+} // namespace Profile