1 files changed, 87 insertions, 0 deletions
diff --git a/Telegram/SourceFiles/payments/ui/payments_form_summary.cpp b/Telegram/SourceFiles/payments/ui/payments_form_summary.cpp
new file mode 100644
index 0000000000..935aa7cdd7
--- /dev/null
+++ b/Telegram/SourceFiles/payments/ui/payments_form_summary.cpp
@@ -0,0 +1,87 @@
+/*
+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 "payments/ui/payments_form_summary.h"
+
+#include "payments/ui/payments_panel_delegate.h"
+#include "ui/widgets/scroll_area.h"
+#include "ui/widgets/buttons.h"
+#include "ui/wrap/vertical_layout.h"
+#include "ui/wrap/fade_wrap.h"
+#include "lang/lang_keys.h"
+#include "styles/style_payments.h"
+#include "styles/style_passport.h"
+
+namespace Payments::Ui {
+
+using namespace ::Ui;
+
+class PanelDelegate;
+
+FormSummary::FormSummary(
+	QWidget *parent,
+	const Invoice &invoice,
+	not_null<PanelDelegate*> delegate)
+: _delegate(delegate)
+, _scroll(this, st::passportPanelScroll)
+, _topShadow(this)
+, _bottomShadow(this)
+, _submit(
+		this,
+		tr::lng_payments_pay_amount(lt_amount, rpl::single(QString("much"))),
+		st::passportPanelAuthorize) {
+	setupControls();
+}
+
+void FormSummary::setupControls() {
+	const auto inner = setupContent();
+
+	_submit->addClickHandler([=] {
+		_delegate->panelSubmit();
+	});
+
+	using namespace rpl::mappers;
+
+	_topShadow->toggleOn(
+		_scroll->scrollTopValue() | rpl::map(_1 > 0));
+	_bottomShadow->toggleOn(rpl::combine(
+		_scroll->scrollTopValue(),
+		_scroll->heightValue(),
+		inner->heightValue(),
+		_1 + _2 < _3));
+}
+
+not_null<Ui::RpWidget*> FormSummary::setupContent() {
+	const auto inner = _scroll->setOwnedWidget(
+		object_ptr<Ui::VerticalLayout>(this));
+
+	_scroll->widthValue(
+	) | rpl::start_with_next([=](int width) {
+		inner->resizeToWidth(width);
+	}, inner->lifetime());
+
+	return inner;
+}
+
+void FormSummary::resizeEvent(QResizeEvent *e) {
+	updateControlsGeometry();
+}
+
+void FormSummary::updateControlsGeometry() {
+	const auto submitTop = height() - _submit->height();
+	_scroll->setGeometry(0, 0, width(), submitTop);
+	_topShadow->resizeToWidth(width());
+	_topShadow->moveToLeft(0, 0);
+	_bottomShadow->resizeToWidth(width());
+	_bottomShadow->moveToLeft(0, submitTop - st::lineWidth);
+	_submit->setFullWidth(width());
+	_submit->moveToLeft(0, submitTop);
+
+	_scroll->updateBars();
+}
+
+} // namespace Payments::Ui