init

Telegram/lib_ui/ui/wrap/fade_wrap.cpp

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+// This file is part of Desktop App Toolkit,
+// a set of libraries for developing nice desktop applications.
+//
+// For license and copyright information please follow this link:
+// https://github.com/desktop-app/legal/blob/master/LEGAL
+//
+#include "ui/wrap/fade_wrap.h"
+
+#include "ui/widgets/shadow.h"
+#include "ui/painter.h"
+#include "styles/palette.h"
+
+namespace Ui {
+
+FadeWrap<RpWidget>::FadeWrap(
+	QWidget *parent,
+	object_ptr<RpWidget> &&child,
+	float64 scale)
+: Parent(parent, std::move(child))
+, _animation(this, scale)
+, _duration(st::fadeWrapDuration) {
+	if (auto weak = wrapped()) {
+		weak->show();
+	}
+}
+
+FadeWrap<RpWidget> *FadeWrap<RpWidget>::setDuration(int duration) {
+	_duration = duration;
+	return this;
+}
+
+FadeWrap<RpWidget> *FadeWrap<RpWidget>::toggle(
+		bool shown,
+		anim::type animated) {
+	auto changed = (shown != _animation.visible());
+	if (!_duration) {
+		animated = anim::type::instant;
+	}
+	if (shown) {
+		if (animated == anim::type::normal) {
+			if (!_animation.animating()) {
+				wrapped()->show();
+			}
+			_animation.fadeIn(_duration);
+			if (_animation.animating()) {
+				wrapped()->hide();
+			}
+		} else {
+			_animation.show();
+			if (!_animation.animating()) {
+				wrapped()->show();
+			}
+		}
+	} else {
+		if (animated == anim::type::normal) {
+			if (!_animation.animating()) {
+				wrapped()->show();
+			}
+			_animation.fadeOut(_duration);
+			if (_animation.animating()) {
+				wrapped()->hide();
+			}
+		} else {
+			_animation.hide();
+			if (!_animation.animating()) {
+				wrapped()->show();
+			}
+		}
+	}
+	if (changed) {
+		_toggledChanged.fire_copy(shown);
+	}
+	return this;
+}
+
+FadeWrap<RpWidget> *FadeWrap<RpWidget>::finishAnimating() {
+	_animation.finish();
+	wrapped()->show();
+	return this;
+}
+
+FadeWrap<RpWidget> *FadeWrap<RpWidget>::toggleOn(
+		rpl::producer<bool> &&shown) {
+	std::move(
+		shown
+	) | rpl::on_next([this](bool shown) {
+		toggle(shown, anim::type::normal);
+	}, lifetime());
+	finishAnimating();
+	return this;
+}
+
+void FadeWrap<RpWidget>::paintEvent(QPaintEvent *e) {
+	Painter p(this);
+	if (_animation.paint(p)) {
+		if (!_animation.animating() && _animation.visible()) {
+			crl::on_main(this, [=] {
+				if (!_animation.animating() && _animation.visible()) {
+					wrapped()->show();
+				}
+			});
+		}
+		return;
+	}
+	if (!_animation.animating()) {
+		wrapped()->show();
+	}
+}
+
+FadeShadow::FadeShadow(QWidget *parent)
+: FadeShadow(parent, st::shadowFg) {
+}
+
+FadeShadow::FadeShadow(QWidget *parent, style::color color)
+: Parent(parent, object_ptr<PlainShadow>(parent, color)) {
+	hide(anim::type::instant);
+}
+
+} // namespace Ui
+