tdesktop/Telegram/SourceFiles/info/info_content_widget.h

153 lines
3.7 KiB
C++

/*
This file is part of Telegram Desktop,
the official desktop version of Telegram messaging app, see https://telegram.org
Telegram Desktop is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
It is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
In addition, as a special exception, the copyright holders give permission
to link the code of portions of this program with the OpenSSL library.
Full license: https://github.com/telegramdesktop/tdesktop/blob/master/LICENSE
Copyright (c) 2014-2017 John Preston, https://desktop.telegram.org
*/
#pragma once
#include <rpl/variable.h>
#include "ui/rp_widget.h"
#include "info/info_wrap_widget.h"
namespace Storage {
enum class SharedMediaType : char;
} // namespace Storage
namespace Ui {
class ScrollArea;
struct ScrollToRequest;
} // namespace Ui
namespace Window {
class Controller;
} // namespace Window
namespace Info {
class ContentMemento;
class ContentWidget : public Ui::RpWidget {
public:
ContentWidget(
QWidget *parent,
rpl::producer<Wrap> wrap,
not_null<Window::Controller*> controller,
not_null<PeerData*> peer);
virtual bool showInternal(
not_null<ContentMemento*> memento) = 0;
virtual std::unique_ptr<ContentMemento> createMemento() = 0;
virtual rpl::producer<Section> sectionRequest() const;
virtual Section section() const = 0;
not_null<PeerData*> peer() const {
return _peer;
}
rpl::producer<int> desiredHeightValue() const override;
rpl::producer<bool> desiredShadowVisibility() const;
bool hasTopBarShadow() const;
virtual void setInnerFocus() {
_inner->setFocus();
}
// When resizing the widget with top edge moved up or down and we
// want to add this top movement to the scroll position, so inner
// content will not move.
void setGeometryWithTopMoved(
const QRect &newGeometry,
int topDelta);
// Float player interface.
bool wheelEventFromFloatPlayer(QEvent *e);
QRect rectForFloatPlayer() const;
protected:
template <typename Widget>
Widget *setInnerWidget(
object_ptr<Widget> inner,
int scrollTopSkip = 0) {
return static_cast<Widget*>(
doSetInnerWidget(std::move(inner), scrollTopSkip));
}
not_null<Window::Controller*> controller() const {
return _controller;
}
void resizeEvent(QResizeEvent *e) override;
void paintEvent(QPaintEvent *e) override;
int scrollTopSave() const;
void scrollTopRestore(int scrollTop);
void scrollTo(const Ui::ScrollToRequest &request);
private:
RpWidget *doSetInnerWidget(
object_ptr<RpWidget> inner,
int scrollTopSkip);
const not_null<Window::Controller*> _controller;
const not_null<PeerData*> _peer;
style::color _bg;
int _scrollTopSkip = 0;
object_ptr<Ui::ScrollArea> _scroll;
Ui::RpWidget *_inner = nullptr;
// Saving here topDelta in setGeometryWithTopMoved() to get it passed to resizeEvent().
int _topDelta = 0;
};
class ContentMemento {
public:
ContentMemento(PeerId peerId) : _peerId(peerId) {
}
virtual object_ptr<ContentWidget> createWidget(
QWidget *parent,
rpl::producer<Wrap> wrap,
not_null<Window::Controller*> controller,
const QRect &geometry) = 0;
virtual PeerId peerId() const {
return _peerId;
}
virtual Section section() const = 0;
virtual ~ContentMemento() = default;
void setScrollTop(int scrollTop) {
_scrollTop = scrollTop;
}
int scrollTop() const {
return _scrollTop;
}
private:
PeerId _peerId = 0;
int _scrollTop = 0;
};
} // namespace Info