tdesktop/Telegram/SourceFiles/window/section_widget.h

111 lines
3.1 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 "ui/twidget.h"
#include "window/window_slide_animation.h"
namespace Window {
class SectionMemento;
struct SectionSlideParams {
QPixmap oldContentCache;
bool withTopBarShadow = false;
explicit operator bool() const {
return !oldContentCache.isNull();
}
};
class SectionWidget : public TWidget, protected base::Subscriber {
Q_OBJECT
public:
SectionWidget(QWidget *parent);
virtual PeerData *peerForDialogs() const {
return nullptr;
}
// 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);
virtual bool hasTopBarShadow() const {
return false;
}
void showAnimated(SlideDirection direction, const SectionSlideParams &params);
void showFast();
// This can be used to grab with or without top bar shadow.
// This will be protected when animation preparation will be done inside.
virtual QPixmap grabForShowAnimation(const SectionSlideParams &params) {
return myGrab(this);
}
// Attempt to show the required section inside the existing one.
// For example if this section already shows exactly the required
// memento it can simply return true - it is shown already.
virtual bool showInternal(const SectionMemento *memento) = 0;
// Create a memento of that section to store it in the history stack.
virtual std_::unique_ptr<SectionMemento> createMemento() const = 0;
void setInnerFocus() {
doSetInnerFocus();
}
protected:
void paintEvent(QPaintEvent *e) override;
// Temp variable used in resizeEvent() implementation, that is passed
// to setGeometryWithTopMoved() to adjust the scroll position with the resize.
int topDelta() const {
return _topDelta;
}
// Called after the hideChildren() call in showAnimated().
virtual void showAnimatedHook() {
}
// Called after the showChildren() call in showFinished().
virtual void showFinishedHook() {
}
virtual void doSetInnerFocus() {
setFocus();
}
private:
void showFinished();
std_::unique_ptr<SlideAnimation> _showAnimation;
// Saving here topDelta in resizeWithTopMoved() to get it passed to resizeEvent().
int _topDelta = 0;
};
} // namespace Window