tdesktop/Telegram/SourceFiles/ui/inner_dropdown.h

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/*
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) 2014-2016 John Preston, https://desktop.telegram.org
*/
#pragma once
#include "ui/boxshadow.h"
class ScrollArea;
namespace Ui {
class InnerDropdown : public TWidget {
Q_OBJECT
public:
InnerDropdown(QWidget *parent, const style::InnerDropdown &st = st::defaultInnerDropdown, const style::flatScroll &scrollSt = st::scrollDef);
void setOwnedWidget(ScrolledWidget *widget);
bool overlaps(const QRect &globalRect) {
if (isHidden() || !_a_appearance.isNull()) return false;
return rect().marginsRemoved(_st.padding).contains(QRect(mapFromGlobal(globalRect.topLeft()), globalRect.size()));
}
void setMaxHeight(int newMaxHeight);
void otherEnter();
void otherLeave();
protected:
void resizeEvent(QResizeEvent *e) override;
void paintEvent(QPaintEvent *e) override;
void enterEvent(QEvent *e) override;
void leaveEvent(QEvent *e) override;
bool eventFilter(QObject *obj, QEvent *e) override;
signals:
void hidden();
private slots:
void onHideStart();
void onWindowActiveChanged();
void onScroll();
void onWidgetHeightUpdated();
private:
void repaintCallback();
void hidingFinished();
void showingStarted();
void startAnimation();
void updateHeight();
const style::InnerDropdown &_st;
bool _hiding = false;
QPixmap _cache;
FloatAnimation _a_appearance;
QTimer _hideTimer;
RectShadow _shadow;
ChildWidget<ScrollArea> _scroll;
int _maxHeight = 0;
};
namespace internal {
class Container : public ScrolledWidget {
Q_OBJECT
public:
Container(QWidget *parent, ScrolledWidget *child, const style::InnerDropdown &st);
void setVisibleTopBottom(int visibleTop, int visibleBottom) override;
private slots:
void onHeightUpdate();
protected:
int resizeGetHeight(int newWidth) override;
private:
const style::InnerDropdown &_st;
};
} // namespace internal
} // namespace Ui