tdesktop/Telegram/SourceFiles/ui/widgets/inner_dropdown.h

160 lines
4.1 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 "styles/style_widgets.h"
#include "ui/effects/panel_animation.h"
namespace Ui {
class ScrollArea;
class InnerDropdown : public TWidget {
Q_OBJECT
public:
InnerDropdown(QWidget *parent, const style::InnerDropdown &st = st::defaultInnerDropdown);
template <typename Widget>
QPointer<Widget> setOwnedWidget(object_ptr<Widget> widget) {
auto result = doSetOwnedWidget(std::move(widget));
return QPointer<Widget>(static_cast<Widget*>(result.data()));
}
bool overlaps(const QRect &globalRect) {
if (isHidden() || _a_show.animating() || _a_opacity.animating()) return false;
return rect().marginsRemoved(_st.padding).contains(QRect(mapFromGlobal(globalRect.topLeft()), globalRect.size()));
}
void setAutoHiding(bool autoHiding) {
_autoHiding = autoHiding;
}
void setMaxHeight(int newMaxHeight);
void resizeToContent();
void otherEnter();
void otherLeave();
void setShowStartCallback(base::lambda<void()> callback) {
_showStartCallback = std::move(callback);
}
void setHideStartCallback(base::lambda<void()> callback) {
_hideStartCallback = std::move(callback);
}
void setHiddenCallback(base::lambda<void()> callback) {
_hiddenCallback = std::move(callback);
}
bool isHiding() const {
return _hiding && _a_opacity.animating();
}
enum class HideOption {
Default,
IgnoreShow,
};
void showAnimated();
void setOrigin(PanelAnimation::Origin origin);
void showAnimated(PanelAnimation::Origin origin);
void hideAnimated(HideOption option = HideOption::Default);
void finishAnimating();
void showFast();
void hideFast();
protected:
void resizeEvent(QResizeEvent *e) override;
void paintEvent(QPaintEvent *e) override;
void enterEventHook(QEvent *e) override;
void leaveEventHook(QEvent *e) override;
bool eventFilter(QObject *obj, QEvent *e) override;
int resizeGetHeight(int newWidth) override;
private slots:
void onHideAnimated() {
hideAnimated();
}
void onWindowActiveChanged();
void onScroll();
void onWidgetHeightUpdated() {
resizeToContent();
}
private:
QPointer<TWidget> doSetOwnedWidget(object_ptr<TWidget> widget);
QImage grabForPanelAnimation();
void startShowAnimation();
void startOpacityAnimation(bool hiding);
void prepareCache();
class Container;
void showAnimationCallback();
void opacityAnimationCallback();
void hideFinished();
void showStarted();
void updateHeight();
const style::InnerDropdown &_st;
PanelAnimation::Origin _origin = PanelAnimation::Origin::TopLeft;
std::unique_ptr<PanelAnimation> _showAnimation;
Animation _a_show;
bool _autoHiding = true;
bool _hiding = false;
QPixmap _cache;
Animation _a_opacity;
QTimer _hideTimer;
bool _ignoreShowEvents = false;
base::lambda<void()> _showStartCallback;
base::lambda<void()> _hideStartCallback;
base::lambda<void()> _hiddenCallback;
object_ptr<Ui::ScrollArea> _scroll;
int _maxHeight = 0;
};
class InnerDropdown::Container : public TWidget {
public:
Container(QWidget *parent, object_ptr<TWidget> child, const style::InnerDropdown &st);
void resizeToContent();
protected:
int resizeGetHeight(int newWidth) override;
void visibleTopBottomUpdated(
int visibleTop,
int visibleBottom) override;
private:
object_ptr<TWidget> _child;
const style::InnerDropdown &_st;
};
} // namespace Ui