tdesktop/Telegram/SourceFiles/platform/platform_overlay_widget.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 "platform/platform_overlay_widget.h"
#include "ui/effects/animations.h"
#include "ui/platform/ui_platform_window_title.h"
#include "ui/widgets/rp_window.h"
#include "ui/abstract_button.h"
#include "styles/style_media_view.h"
namespace Media::View {
QColor OverBackgroundColor() {
auto c1 = st::mediaviewBg->c;
auto c2 = QColor(255, 255, 255);
const auto mix = [&](int a, int b) {
constexpr auto k1 = 0.15 * 0.85 / (1. - 0.85 * 0.85);
constexpr auto k2 = 0.15 / (1. - 0.85 * 0.85);
return int(a * k1 + b * k2);
};
return QColor(
mix(c1.red(), c2.red()),
mix(c1.green(), c2.green()),
mix(c1.blue(), c2.blue()));
}
} // namespace Media::View
namespace Platform {
namespace {
using namespace Media::View;
} // namespace
class DefaultOverlayWidgetHelper::Buttons final
: public Ui::Platform::AbstractTitleButtons {
public:
using Control = Ui::Platform::TitleControl;
object_ptr<Ui::AbstractButton> create(
not_null<QWidget*> parent,
Control control,
const style::WindowTitle &st) override;
void updateState(
bool active,
bool maximized,
const style::WindowTitle &st) override;
void notifySynteticOver(Control control, bool over) override;
void setMasterOpacity(float64 opacity);
[[nodiscard]] rpl::producer<> activations() const;
void clearState();
private:
rpl::event_stream<> _activations;
rpl::variable<float64> _masterOpacity = 1.;
rpl::variable<bool> _maximized = false;
rpl::event_stream<> _clearStateRequests;
};
object_ptr<Ui::AbstractButton> DefaultOverlayWidgetHelper::Buttons::create(
not_null<QWidget*> parent,
Control control,
const style::WindowTitle &st) {
auto result = object_ptr<Ui::AbstractButton>(parent);
const auto raw = result.data();
struct State {
Ui::Animations::Simple animation;
float64 progress = -1.;
QImage frame;
bool maximized = false;
bool over = false;
};
const auto state = raw->lifetime().make_state<State>();
rpl::merge(
_masterOpacity.changes() | rpl::to_empty,
_maximized.changes() | rpl::to_empty
) | rpl::start_with_next([=] {
raw->update();
}, raw->lifetime());
_clearStateRequests.events(
) | rpl::start_with_next([=] {
raw->clearState();
raw->update();
state->over = raw->isOver();
state->animation.stop();
}, raw->lifetime());
const auto icon = [&] {
switch (control) {
case Control::Minimize: return &st::mediaviewTitleMinimize;
case Control::Maximize: return &st::mediaviewTitleMaximize;
case Control::Close: return &st::mediaviewTitleClose;
}
Unexpected("Value in DefaultOverlayWidgetHelper::Buttons::create.");
}();
raw->resize(icon->size());
state->frame = QImage(
icon->size() * style::DevicePixelRatio(),
QImage::Format_ARGB32_Premultiplied);
state->frame.setDevicePixelRatio(style::DevicePixelRatio());
const auto updateOver = [=] {
const auto over = raw->isOver();
if (state->over == over) {
return;
}
state->over = over;
state->animation.start(
[=] { raw->update(); },
state->over ? 0. : 1.,
state->over ? 1. : 0.,
st::mediaviewFadeDuration);
};
const auto prepareFrame = [=] {
const auto progress = state->animation.value(state->over ? 1. : 0.);
const auto maximized = _maximized.current();
if (state->progress == progress && state->maximized == maximized) {
return;
}
state->progress = progress;
state->maximized = maximized;
auto current = icon;
if (control == Control::Maximize) {
current = maximized ? &st::mediaviewTitleRestore : icon;
}
const auto alpha = progress * kOverBackgroundOpacity;
auto color = OverBackgroundColor();
color.setAlpha(anim::interpolate(0, 255, alpha));
state->frame.fill(color);
auto q = QPainter(&state->frame);
const auto normal = maximized
? kMaximizedIconOpacity
: kNormalIconOpacity;
q.setOpacity(progress + (1 - progress) * normal);
current->paint(q, 0, 0, raw->width());
q.end();
};
raw->paintRequest(
) | rpl::start_with_next([=] {
updateOver();
prepareFrame();
auto p = QPainter(raw);
p.setOpacity(_masterOpacity.current());
p.drawImage(0, 0, state->frame);
}, raw->lifetime());
return result;
}
void DefaultOverlayWidgetHelper::Buttons::updateState(
bool active,
bool maximized,
const style::WindowTitle &st) {
_maximized = maximized;
}
void DefaultOverlayWidgetHelper::Buttons::notifySynteticOver(
Ui::Platform::TitleControl control,
bool over) {
if (over) {
_activations.fire({});
}
}
void DefaultOverlayWidgetHelper::Buttons::clearState() {
_clearStateRequests.fire({});
}
void DefaultOverlayWidgetHelper::Buttons::setMasterOpacity(float64 opacity) {
_masterOpacity = opacity;
}
rpl::producer<> DefaultOverlayWidgetHelper::Buttons::activations() const {
return _activations.events();
}
void OverlayWidgetHelper::minimize(not_null<Ui::RpWindow*> window) {
window->setWindowState(window->windowState() | Qt::WindowMinimized);
}
DefaultOverlayWidgetHelper::DefaultOverlayWidgetHelper(
not_null<Ui::RpWindow*> window,
Fn<void(bool)> maximize)
: _buttons(new DefaultOverlayWidgetHelper::Buttons())
, _controls(Ui::Platform::SetupSeparateTitleControls(
window,
std::make_unique<Ui::Platform::SeparateTitleControls>(
window->body(),
st::mediaviewTitle,
std::unique_ptr<DefaultOverlayWidgetHelper::Buttons>(_buttons.get()),
std::move(maximize)))) {
}
DefaultOverlayWidgetHelper::~DefaultOverlayWidgetHelper() = default;
void DefaultOverlayWidgetHelper::orderWidgets() {
_controls->wrap.raise();
}
bool DefaultOverlayWidgetHelper::skipTitleHitTest(QPoint position) {
return _controls->controls.geometry().contains(position);
}
rpl::producer<> DefaultOverlayWidgetHelper::controlsActivations() {
return _buttons->activations();
}
rpl::producer<bool> DefaultOverlayWidgetHelper::controlsSideRightValue() {
using namespace Ui::Platform;
return TitleControlsLayoutValue(
) | rpl::map([=](const TitleControls::Layout &layout) {
return !TitleControlsOnLeft(layout);
}) | rpl::distinct_until_changed();
}
void DefaultOverlayWidgetHelper::beforeShow(bool fullscreen) {
_buttons->clearState();
}
void DefaultOverlayWidgetHelper::clearState() {
_buttons->clearState();
}
void DefaultOverlayWidgetHelper::setControlsOpacity(float64 opacity) {
_buttons->setMasterOpacity(opacity);
}
auto DefaultOverlayWidgetHelper::mouseEvents() const
-> rpl::producer<not_null<QMouseEvent*>> {
return _controls->wrap.events(
) | rpl::filter([](not_null<QEvent*> e) {
const auto type = e->type();
return (type == QEvent::MouseButtonPress)
|| (type == QEvent::MouseButtonRelease)
|| (type == QEvent::MouseMove)
|| (type == QEvent::MouseButtonDblClick);
}) | rpl::map([](not_null<QEvent*> e) {
return not_null{ static_cast<QMouseEvent*>(e.get()) };
});
}
} // namespace Platform