78 lines
1.8 KiB
C++
78 lines
1.8 KiB
C++
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/*
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This file is part of Telegram Desktop,
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the official desktop application for the Telegram messaging service.
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For license and copyright information please follow this link:
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https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
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*/
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#include "calls/calls_signal_bars.h"
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#include "calls/calls_call.h"
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#include "styles/style_calls.h"
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namespace Calls {
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SignalBars::SignalBars(
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QWidget *parent,
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not_null<Call*> call,
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const style::CallSignalBars &st,
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Fn<void()> displayedChangedCallback)
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: RpWidget(parent)
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, _st(st)
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, _count(Call::kSignalBarStarting)
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, _displayedChangedCallback(std::move(displayedChangedCallback)) {
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resize(
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_st.width + (_st.width + _st.skip) * (Call::kSignalBarCount - 1),
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_st.width * Call::kSignalBarCount);
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call->signalBarCountValue(
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) | rpl::start_with_next([=](int count) {
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changed(count);
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}, lifetime());
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}
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bool SignalBars::isDisplayed() const {
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return (_count >= 0);
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}
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void SignalBars::paintEvent(QPaintEvent *e) {
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if (!isDisplayed()) {
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return;
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}
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Painter p(this);
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PainterHighQualityEnabler hq(p);
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p.setPen(Qt::NoPen);
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p.setBrush(_st.color);
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for (auto i = 0; i < Call::kSignalBarCount; ++i) {
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p.setOpacity((i < _count) ? 1. : _st.inactiveOpacity);
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const auto barHeight = (i + 1) * _st.width;
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const auto barLeft = i * (_st.width + _st.skip);
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const auto barTop = height() - barHeight;
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p.drawRoundedRect(
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barLeft,
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barTop,
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_st.width,
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barHeight,
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_st.radius,
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_st.radius);
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}
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p.setOpacity(1.);
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}
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void SignalBars::changed(int count) {
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if (_count == Call::kSignalBarFinished) {
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return;
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}
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if (_count != count) {
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const auto wasDisplayed = isDisplayed();
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_count = count;
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if (isDisplayed() != wasDisplayed && _displayedChangedCallback) {
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_displayedChangedCallback();
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}
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update();
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}
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}
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} // namespace Calls
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