Profile members block displayed when mouse is over group members count.

Telegram/SourceFiles/dropdown.cpp

@@ -1019,11 +1019,11 @@ void EmojiPanInner::leaveEvent(QEvent *e) {
 	clearSelection();
 }
 
-void EmojiPanInner::leaveToChildEvent(QEvent *e) {
+void EmojiPanInner::leaveToChildEvent(QEvent *e, QWidget *child) {
 	clearSelection();
 }
 
-void EmojiPanInner::enterFromChildEvent(QEvent *e) {
+void EmojiPanInner::enterFromChildEvent(QEvent *e, QWidget *child) {
 	_lastMousePos = QCursor::pos();
 	updateSelected();
 }
@@ -1544,11 +1544,11 @@ void StickerPanInner::leaveEvent(QEvent *e) {
 	clearSelection();
 }
 
-void StickerPanInner::leaveToChildEvent(QEvent *e) {
+void StickerPanInner::leaveToChildEvent(QEvent *e, QWidget *child) {
 	clearSelection();
 }
 
-void StickerPanInner::enterFromChildEvent(QEvent *e) {
+void StickerPanInner::enterFromChildEvent(QEvent *e, QWidget *child) {
 	_lastMousePos = QCursor::pos();
 	updateSelected();
 }
@@ -3139,7 +3139,7 @@ void EmojiPan::onRefreshPanels() {
 	}
 }
 
-void EmojiPan::leaveToChildEvent(QEvent *e) {
+void EmojiPan::leaveToChildEvent(QEvent *e, QWidget *child) {
 	if (!_stickersShown) return;
 	_iconsMousePos = QCursor::pos();
 	updateSelected();

Telegram/SourceFiles/dropdown.h

@@ -254,14 +254,14 @@ public:
 	EmojiPanInner();
 
 	void setMaxHeight(int32 h);
-	void paintEvent(QPaintEvent *e);
+	void paintEvent(QPaintEvent *e) override;
 
-	void mousePressEvent(QMouseEvent *e);
+	void mousePressEvent(QMouseEvent *e) override;
-	void mouseReleaseEvent(QMouseEvent *e);
+	void mouseReleaseEvent(QMouseEvent *e) override;
-	void mouseMoveEvent(QMouseEvent *e);
+	void mouseMoveEvent(QMouseEvent *e) override;
-	void leaveEvent(QEvent *e);
+	void leaveEvent(QEvent *e) override;
-	void leaveToChildEvent(QEvent *e);
+	void leaveToChildEvent(QEvent *e, QWidget *child) override;
-	void enterFromChildEvent(QEvent *e);
+	void enterFromChildEvent(QEvent *e, QWidget *child) override;
 
 	void step_selected(uint64 ms, bool timer);
 	void hideFinish();
@@ -346,14 +346,14 @@ public:
 	StickerPanInner();
 
 	void setMaxHeight(int32 h);
-	void paintEvent(QPaintEvent *e);
+	void paintEvent(QPaintEvent *e) override;
 
-	void mousePressEvent(QMouseEvent *e);
+	void mousePressEvent(QMouseEvent *e) override;
-	void mouseReleaseEvent(QMouseEvent *e);
+	void mouseReleaseEvent(QMouseEvent *e) override;
-	void mouseMoveEvent(QMouseEvent *e);
+	void mouseMoveEvent(QMouseEvent *e) override;
-	void leaveEvent(QEvent *e);
+	void leaveEvent(QEvent *e) override;
-	void leaveToChildEvent(QEvent *e);
+	void leaveToChildEvent(QEvent *e, QWidget *child) override;
-	void enterFromChildEvent(QEvent *e);
+	void enterFromChildEvent(QEvent *e, QWidget *child) override;
 
 	void step_selected(uint64 ms, bool timer);
 
@@ -663,7 +663,7 @@ private:
 	bool _horizontal;
 	void updateContentHeight();
 
-	void leaveToChildEvent(QEvent *e);
+	void leaveToChildEvent(QEvent *e, QWidget *child);
 	void hideAnimated();
 	void prepareShowHideCache();
 

Telegram/SourceFiles/historywidget.cpp

@@ -28,9 +28,11 @@ Copyright (c) 2014-2016 John Preston, https://desktop.telegram.org
 #include "ui/filedialog.h"
 #include "ui/toast/toast.h"
 #include "ui/buttons/history_down_button.h"
+#include "ui/inner_dropdown.h"
 #include "inline_bots/inline_bot_result.h"
 #include "data/data_drafts.h"
 #include "history/history_service_layout.h"
+#include "profile/profile_members_widget.h"
 #include "lang.h"
 #include "application.h"
 #include "mainwidget.h"
@@ -5442,7 +5444,7 @@ void HistoryWidget::mouseMoveEvent(QMouseEvent *e) {
 	if (startAnim) _a_record.start();
 }
 
-void HistoryWidget::leaveToChildEvent(QEvent *e) { // e -- from enterEvent() of child TWidget
+void HistoryWidget::leaveToChildEvent(QEvent *e, QWidget *child) { // e -- from enterEvent() of child TWidget
 	if (hasMouseTracking()) mouseMoveEvent(0);
 }
 
@@ -6009,6 +6011,37 @@ void HistoryWidget::paintTopBar(Painter &p, float64 over, int32 decreaseWidth) {
 	}
 }
 
+QRect HistoryWidget::getMembersShowAreaGeometry() const {
+	int increaseLeft = Adaptive::OneColumn() ? (st::topBarForwardPadding.right() - st::topBarForwardPadding.left()) : 0;
+	int membersTextLeft = st::topBarForwardPadding.left() + increaseLeft;
+	int membersTextTop = st::topBarHeight - st::topBarForwardPadding.bottom() - st::dialogsTextFont->height - st::topBarForwardPadding.bottom();
+	int membersTextWidth = _titlePeerTextWidth;
+	int membersTextHeight = st::topBarHeight - membersTextTop;
+
+	membersTextLeft -= st::topBarForwardPadding.left();
+	membersTextWidth += 2 * st::topBarForwardPadding.left();
+
+	return rtlrect(membersTextLeft, membersTextTop, membersTextWidth, membersTextHeight, width());
+}
+
+void HistoryWidget::setMembersShowAreaActive(bool active) {
+	if (active && _peer && (_peer->isChat() || _peer->isMegagroup())) {
+		if (!_membersDropdown) {
+			_membersDropdown = new Ui::InnerDropdown(this, st::dropdownDef, st::solidScroll);
+			_membersDropdown->setOwnedWidget(new Profile::MembersWidget(_membersDropdown, _peer, Profile::MembersWidget::TitleVisibility::Hidden));
+			_membersDropdown->setGeometry(0, 0, st::emojiPanWidth, st::emojiPanMaxHeight);
+			connect(_membersDropdown, SIGNAL(hidden()), this, SLOT(onMembersDropdownHidden()));
+		}
+		_membersDropdown->otherEnter();
+	} else if (_membersDropdown) {
+		_membersDropdown->otherLeave();
+	}
+}
+
+void HistoryWidget::onMembersDropdownHidden() {
+	_membersDropdown.destroyDelayed();
+}
+
 void HistoryWidget::topBarClick() {
 	if (Adaptive::OneColumn()) {
 		Ui::showChatsList();
@@ -6074,6 +6107,7 @@ void HistoryWidget::updateOnlineDisplay(int32 x, int32 w) {
 		_titlePeerTextOnline = titlePeerTextOnline;
 		_titlePeerTextWidth = st::dialogsTextFont->width(_titlePeerText);
 		if (App::main()) {
+			App::main()->topBar()->updateMembersShowArea();
 			App::main()->topBar()->update();
 		}
 	}
@@ -7263,6 +7297,9 @@ bool HistoryWidget::pinnedMsgVisibilityUpdated() {
 			connect(&_pinnedBar->cancel, SIGNAL(clicked()), this, SLOT(onPinnedHide()));
 			_reportSpamPanel.raise();
 			_topShadow.raise();
+			if (_membersDropdown) {
+				_membersDropdown->raise();
+			}
 			updatePinnedBar();
 			result = true;
 

Telegram/SourceFiles/historywidget.h

@@ -36,6 +36,7 @@ class Result;
 
 namespace Ui {
 class HistoryDownButton;
+class InnerDropdown;
 } // namespace Ui
 
 class HistoryWidget;
@@ -540,12 +541,14 @@ public:
     void dropEvent(QDropEvent *e) override;
 	void mouseReleaseEvent(QMouseEvent *e) override;
 	void mouseMoveEvent(QMouseEvent *e) override;
-	void leaveToChildEvent(QEvent *e) override;
+	void leaveToChildEvent(QEvent *e, QWidget *child) override;
 	void contextMenuEvent(QContextMenuEvent *e) override;
 
 	void updateTopBarSelection();
 
 	void paintTopBar(Painter &p, float64 over, int32 decreaseWidth);
+	QRect getMembersShowAreaGeometry() const;
+	void setMembersShowAreaActive(bool active);
 	void topBarClick();
 
 	void loadMessages();
@@ -839,6 +842,7 @@ private slots:
 	void onHashtagOrBotCommandInsert(QString str, FieldAutocomplete::ChooseMethod method);
 	void onMentionInsert(UserData *user);
 	void onInlineBotCancel();
+	void onMembersDropdownHidden();
 
 	void updateField();
 
@@ -1099,6 +1103,8 @@ private:
 	ScrollArea _kbScroll;
 	BotKeyboard _keyboard;
 
+	ChildWidget<Ui::InnerDropdown> _membersDropdown = { nullptr };
+
 	Dropdown _attachType;
 	EmojiPan _emojiPan;
 	DragState _attachDrag = DragStateNone;

Telegram/SourceFiles/mainwidget.cpp

@@ -2696,6 +2696,19 @@ void MainWidget::paintTopBar(Painter &p, float64 over, int32 decreaseWidth) {
 	}
 }
 
+QRect MainWidget::getMembersShowAreaGeometry() const {
+	if (!_overview && !_wideSection) {
+		return _history->getMembersShowAreaGeometry();
+	}
+	return QRect();
+}
+
+void MainWidget::setMembersShowAreaActive(bool active) {
+	if (!active || (!_overview && !_wideSection)) {
+		_history->setMembersShowAreaActive(active);
+	}
+}
+
 void MainWidget::onPhotosSelect() {
 	if (_overview) _overview->switchType(OverviewPhotos);
 	_mediaType->hideStart();

Telegram/SourceFiles/mainwidget.h

@@ -162,7 +162,10 @@ public:
 	void updateAdaptiveLayout();
 	bool needBackButton();
 
+	// Temporary methods, while top bar was not done inside HistoryWidget / OverviewWidget.
 	void paintTopBar(Painter &p, float64 over, int32 decreaseWidth);
+	QRect getMembersShowAreaGeometry() const;
+	void setMembersShowAreaActive(bool active);
 	Window::TopBarWidget *topBar();
 
 	PlayerWidget *player();

Telegram/SourceFiles/mediaview.h

@@ -51,10 +51,10 @@ public:
 	bool moveToNext(int32 delta);
 	void preloadData(int32 delta);
 
-	void leaveToChildEvent(QEvent *e) override { // e -- from enterEvent() of child TWidget
+	void leaveToChildEvent(QEvent *e, QWidget *child) override { // e -- from enterEvent() of child TWidget
 		updateOverState(OverNone);
 	}
-	void enterFromChildEvent(QEvent *e) override { // e -- from leaveEvent() of child TWidget
+	void enterFromChildEvent(QEvent *e, QWidget *child) override { // e -- from leaveEvent() of child TWidget
 		updateOver(mapFromGlobal(QCursor::pos()));
 	}
 

Telegram/SourceFiles/profile/profile_block_widget.cpp

@@ -25,29 +25,30 @@ Copyright (c) 2014-2016 John Preston, https://desktop.telegram.org
 
 namespace Profile {
 
-BlockWidget::BlockWidget(QWidget *parent, PeerData *peer, const QString &title) : TWidget(parent)
+BlockWidget::BlockWidget(QWidget *parent, PeerData *peer, const QString &title) : ScrolledWidget(parent)
 , _peer(peer)
 , _title(title) {
 }
 
-void BlockWidget::resizeToWidth(int newWidth) {
-	resize(newWidth, resizeGetHeight(newWidth));
-}
-
 int BlockWidget::contentTop() const {
-	return st::profileBlockMarginTop + st::profileBlockTitleHeight;
+	return st::profileBlockMarginTop + (emptyTitle() ? 0 : st::profileBlockTitleHeight);
 }
 
 void BlockWidget::paintEvent(QPaintEvent *e) {
 	Painter p(this);
 
+	paintTitle(p);
+	paintContents(p);
+}
+
+void BlockWidget::paintTitle(Painter &p) {
+	if (emptyTitle()) return;
+
 	p.setFont(st::profileBlockTitleFont);
 	p.setPen(st::profileBlockTitleFg);
 	int titleLeft = st::profileBlockTitlePosition.x();
 	int titleTop = st::profileBlockMarginTop + st::profileBlockTitlePosition.y();
 	p.drawTextLeft(titleLeft, titleTop, width(), _title);
-
-	paintContents(p);
 }
 
 int defaultOutlineButtonLeft() {

Telegram/SourceFiles/profile/profile_block_widget.h

@@ -24,22 +24,12 @@ Copyright (c) 2014-2016 John Preston, https://desktop.telegram.org
 
 namespace Profile {
 
-class BlockWidget : public TWidget, public Notify::Observer {
+class BlockWidget : public ScrolledWidget, public Notify::Observer {
 	Q_OBJECT
 
 public:
 	BlockWidget(QWidget *parent, PeerData *peer, const QString &title);
 
-	// Count new height for width=newWidth and resize to it.
-	void resizeToWidth(int newWidth);
-
-	// Updates the area that is visible inside the scroll container.
-	virtual void setVisibleTopBottom(int visibleTop, int visibleBottom) {
-	}
-
-	virtual ~BlockWidget() {
-	}
-
 signals:
 	void heightUpdated();
 
@@ -52,7 +42,7 @@ protected:
 	int contentTop() const;
 
 	// Resizes content and counts natural widget height for the desired width.
-	virtual int resizeGetHeight(int newWidth) = 0;
+	int resizeGetHeight(int newWidth) override = 0;
 
 	void contentSizeUpdated() {
 		resizeToWidth(width());
@@ -63,7 +53,13 @@ protected:
 		return _peer;
 	}
 
+	bool emptyTitle() const {
+		return _title.isEmpty();
+	}
+
 private:
+	void paintTitle(Painter &p);
+
 	PeerData *_peer;
 	QString _title;
 

Telegram/SourceFiles/profile/profile_members_widget.cpp

@@ -37,7 +37,8 @@ namespace Profile {
 
 using UpdateFlag = Notify::PeerUpdate::Flag;
 
-MembersWidget::MembersWidget(QWidget *parent, PeerData *peer) : BlockWidget(parent, peer, lang(lng_profile_participants_section)) {
+MembersWidget::MembersWidget(QWidget *parent, PeerData *peer, TitleVisibility titleVisibility)
+: BlockWidget(parent, peer, (titleVisibility == TitleVisibility::Visible) ? lang(lng_profile_participants_section) : QString()) {
 	setMouseTracking(true);
 
 	_removeWidth = st::normalFont->width(lang(lng_profile_kick));
@@ -309,7 +310,7 @@ void MembersWidget::refreshLimitReached() {
 	auto chat = peer()->asChat();
 	if (!chat) return;
 
-	bool limitReachedShown = (_list.size() >= Global::ChatSizeMax()) && chat->amCreator();
+	bool limitReachedShown = (_list.size() >= Global::ChatSizeMax()) && chat->amCreator() && !emptyTitle();
 	if (limitReachedShown && !_limitReachedInfo) {
 		_limitReachedInfo = new FlatLabel(this, st::profileLimitReachedLabel, st::profileLimitReachedStyle);
 		QString title = textRichPrepare(lng_profile_migrate_reached(lt_count, Global::ChatSizeMax()));

Telegram/SourceFiles/profile/profile_members_widget.h

@@ -38,7 +38,11 @@ class MembersWidget : public BlockWidget {
 	Q_OBJECT
 
 public:
-	MembersWidget(QWidget *parent, PeerData *peer);
+	enum class TitleVisibility {
+		Visible,
+		Hidden,
+	};
+	MembersWidget(QWidget *parent, PeerData *peer, TitleVisibility titleVisibility = TitleVisibility::Visible);
 
 	void setVisibleTopBottom(int visibleTop, int visibleBottom) override;
 	int onlineCount() const {
@@ -57,11 +61,11 @@ protected:
 	void mousePressEvent(QMouseEvent *e) override;
 	void mouseReleaseEvent(QMouseEvent *e) override;
 	void enterEvent(QEvent *e) override;
-	void enterFromChildEvent(QEvent *e) override {
+	void enterFromChildEvent(QEvent *e, QWidget *child) override {
 		enterEvent(e);
 	}
 	void leaveEvent(QEvent *e) override;
-	void leaveToChildEvent(QEvent *e) override {
+	void leaveToChildEvent(QEvent *e, QWidget *child) override {
 		leaveEvent(e);
 	}
 

Telegram/SourceFiles/ui/animation.h

@@ -449,13 +449,18 @@ private:
 		} else {
 			_data->a.update(dt, _data->transition);
 		}
-		if (timer) {
+
-			_data->update.call();
+		Callback callbackCache, *toCall = &_data->update;
-		}
 		if (!_data->_a.animating()) {
+			callbackCache = std_::move(_data->update);
+			toCall = &callbackCache;
+
 			delete _data;
 			_data = nullptr;
 		}
+		if (timer) {
+			toCall->call();
+		}
 	}
 
 };

Telegram/SourceFiles/ui/inner_dropdown.cpp

@@ -0,0 +1,185 @@
+/*
+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
+*/
+#include "stdafx.h"
+#include "ui/inner_dropdown.h"
+
+#include "mainwindow.h"
+#include "ui/scrollarea.h"
+#include "profile/profile_members_widget.h"
+
+namespace Ui {
+
+InnerDropdown::InnerDropdown(QWidget *parent, const style::dropdown &st, const style::flatScroll &scrollSt) : TWidget(parent)
+, _st(st)
+, _shadow(_st.shadow)
+, _scroll(this, scrollSt) {
+	_hideTimer.setSingleShot(true);
+	connect(&_hideTimer, SIGNAL(timeout()), this, SLOT(onHideStart()));
+
+	connect(_scroll, SIGNAL(scrolled()), this, SLOT(onScroll()));
+
+	if (cPlatform() == dbipMac || cPlatform() == dbipMacOld) {
+		connect(App::wnd()->windowHandle(), SIGNAL(activeChanged()), this, SLOT(onWindowActiveChanged()));
+	}
+
+	hide();
+}
+
+void InnerDropdown::setOwnedWidget(ScrolledWidget *widget) {
+	_scroll->setOwnedWidget(widget);
+	widget->show();
+	widget->move(0, 0);
+	widget->resizeToWidth(_scroll->width() - st::scrollDef.width);
+}
+
+void InnerDropdown::onWindowActiveChanged() {
+	if (!App::wnd()->windowHandle()->isActive() && !isHidden()) {
+		leaveEvent(nullptr);
+	}
+}
+
+void InnerDropdown::resizeEvent(QResizeEvent *e) {
+	_scroll->setGeometry(rect().marginsRemoved(_st.padding));
+	if (auto widget = static_cast<ScrolledWidget*>(_scroll->widget())) {
+		widget->resizeToWidth(_scroll->width() - st::scrollDef.width);
+		onScroll();
+	}
+}
+
+void InnerDropdown::onScroll() {
+	if (auto widget = static_cast<ScrolledWidget*>(_scroll->widget())) {
+		int visibleTop = _scroll->scrollTop();
+		int visibleBottom = visibleTop + _scroll->height();
+		widget->setVisibleTopBottom(visibleTop, visibleBottom);
+	}
+}
+
+void InnerDropdown::paintEvent(QPaintEvent *e) {
+	QPainter p(this);
+
+	if (!_cache.isNull()) {
+		bool animating = _a_appearance.animating(getms());
+		if (animating) {
+			p.setOpacity(_a_appearance.current(_hiding));
+		} else if (_hiding) {
+			hidingFinished();
+			return;
+		}
+		p.drawPixmap(0, 0, _cache);
+		if (!animating) {
+			showChildren();
+			_cache = QPixmap();
+		}
+		return;
+	}
+
+	// draw shadow
+	QRect shadowedRect = rect().marginsRemoved(_st.padding);
+	_shadow.paint(p, shadowedRect, _st.shadowShift);
+	p.fillRect(shadowedRect, st::windowBg);
+}
+
+void InnerDropdown::enterEvent(QEvent *e) {
+	_hideTimer.stop();
+	if (_hiding) showingStarted();
+	return TWidget::enterEvent(e);
+}
+
+void InnerDropdown::leaveEvent(QEvent *e) {
+	if (_a_appearance.animating(getms())) {
+		onHideStart();
+	} else {
+		_hideTimer.start(300);
+	}
+	return TWidget::leaveEvent(e);
+}
+
+void InnerDropdown::otherEnter() {
+	_hideTimer.stop();
+	showingStarted();
+}
+
+void InnerDropdown::otherLeave() {
+	if (_a_appearance.animating(getms())) {
+		onHideStart();
+	} else {
+		_hideTimer.start(0);
+	}
+}
+
+void InnerDropdown::onHideStart() {
+	if (_hiding) return;
+
+	_hiding = true;
+	startAnimation();
+}
+
+void InnerDropdown::startAnimation() {
+	auto from = _hiding ? 1. : 0.;
+	auto to = _hiding ? 0. : 1.;
+	if (_a_appearance.isNull()) {
+		showChildren();
+		_cache = myGrab(this);
+	}
+	hideChildren();
+	START_ANIMATION(_a_appearance, func(this, &InnerDropdown::repaintCallback), from, to, _st.duration, anim::linear);
+}
+
+void InnerDropdown::hidingFinished() {
+	hide();
+//	showChildren();
+	emit hidden();
+}
+
+void InnerDropdown::showingStarted() {
+	if (isHidden()) {
+		show();
+	} else if (!_hiding) {
+		return;
+	}
+	_hiding = false;
+	startAnimation();
+}
+
+void InnerDropdown::repaintCallback() {
+	update();
+	if (!_a_appearance.animating(getms()) && _hiding) {
+		_hiding = false;
+		hidingFinished();
+	}
+}
+
+bool InnerDropdown::eventFilter(QObject *obj, QEvent *e) {
+	if (e->type() == QEvent::Enter) {
+		otherEnter();
+	} else if (e->type() == QEvent::Leave) {
+		otherLeave();
+	} else if (e->type() == QEvent::MouseButtonPress && static_cast<QMouseEvent*>(e)->button() == Qt::LeftButton) {
+		if (isHidden() || _hiding) {
+			otherEnter();
+		} else {
+			otherLeave();
+		}
+	}
+	return false;
+}
+
+} // namespace Ui

Telegram/SourceFiles/ui/inner_dropdown.h

@@ -0,0 +1,82 @@
+/*
+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
+
+class ScrollArea;
+
+namespace Ui {
+
+class InnerDropdown : public TWidget {
+	Q_OBJECT
+
+public:
+	InnerDropdown(QWidget *parent, const style::dropdown &st = st::dropdownDef, 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 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();
+
+private:
+	void repaintCallback();
+
+	void hidingFinished();
+	void showingStarted();
+
+	void startAnimation();
+
+	const style::dropdown &_st;
+
+	bool _hiding = false;
+
+	QPixmap _cache;
+	FloatAnimation _a_appearance;
+
+	QTimer _hideTimer;
+
+	BoxShadow _shadow;
+	ChildWidget<ScrollArea> _scroll;
+
+};
+
+} // namespace Ui

Telegram/SourceFiles/ui/scrollarea.h

@@ -268,3 +268,25 @@ public:
 	}
 	void paintEvent(QPaintEvent *e);
 };
+
+class ScrolledWidget : public TWidget {
+public:
+	ScrolledWidget(QWidget *parent = nullptr) : TWidget(parent) {
+	}
+
+	// Count new height for width=newWidth and resize to it.
+	void resizeToWidth(int newWidth) {
+		resize(newWidth, resizeGetHeight(newWidth));
+	}
+
+	// Updates the area that is visible inside the scroll container.
+	virtual void setVisibleTopBottom(int visibleTop, int visibleBottom) {
+	}
+
+protected:
+	// Resizes content and counts natural widget height for the desired width.
+	virtual int resizeGetHeight(int newWidth) {
+		return height();
+	}
+
+};

Telegram/SourceFiles/ui/twidget.h

@@ -127,9 +127,9 @@ return qobject_cast<TWidget*>(parentWidget()); \
 const TWidget *tparent() const { \
 	return qobject_cast<const TWidget*>(parentWidget()); \
 } \
-virtual void leaveToChildEvent(QEvent *e) { /* e -- from enterEvent() of child TWidget */ \
+virtual void leaveToChildEvent(QEvent *e, QWidget *child) { /* e -- from enterEvent() of child TWidget */ \
 } \
-virtual void enterFromChildEvent(QEvent *e) { /* e -- from leaveEvent() of child TWidget */ \
+virtual void enterFromChildEvent(QEvent *e, QWidget *child) { /* e -- from leaveEvent() of child TWidget */ \
 } \
 void moveToLeft(int x, int y, int outerw = 0) { \
 	move(rtl() ? ((outerw > 0 ? outerw : parentWidget()->width()) - x - width()) : x, y); \
@@ -158,12 +158,12 @@ void rtlupdate(int x, int y, int w, int h) { \
 protected: \
 void enterEvent(QEvent *e) override { \
 	TWidget *p(tparent()); \
-	if (p) p->leaveToChildEvent(e); \
+	if (p) p->leaveToChildEvent(e, this); \
 	return enterEventHook(e); \
 } \
 void leaveEvent(QEvent *e) override { \
 	TWidget *p(tparent()); \
-	if (p) p->enterFromChildEvent(e); \
+	if (p) p->enterFromChildEvent(e, this); \
 	return leaveEventHook(e); \
 }
 
@@ -199,6 +199,9 @@ public:
 		}
 	}
 
+	virtual ~TWidget() {
+	}
+
 protected:
 	void enterEventHook(QEvent *e) {
 		return QWidget::enterEvent(e);

Telegram/SourceFiles/window/top_bar_widget.cpp

@@ -86,9 +86,11 @@ void TopBarWidget::enterEvent(QEvent *e) {
 	_a_appearance.start();
 }
 
-void TopBarWidget::enterFromChildEvent(QEvent *e) {
+void TopBarWidget::enterFromChildEvent(QEvent *e, QWidget *child) {
-	a_over.start(1);
+	if (child != _membersShowArea) {
-	_a_appearance.start();
+		a_over.start(1);
+		_a_appearance.start();
+	}
 }
 
 void TopBarWidget::leaveEvent(QEvent *e) {
@@ -96,9 +98,11 @@ void TopBarWidget::leaveEvent(QEvent *e) {
 	_a_appearance.start();
 }
 
-void TopBarWidget::leaveToChildEvent(QEvent *e) {
+void TopBarWidget::leaveToChildEvent(QEvent *e, QWidget *child) {
-	a_over.start(0);
+	if (child != _membersShowArea) {
-	_a_appearance.start();
+		a_over.start(0);
+		_a_appearance.start();
+	}
 }
 
 void TopBarWidget::step_appearance(float64 ms, bool timer) {
@@ -112,6 +116,25 @@ void TopBarWidget::step_appearance(float64 ms, bool timer) {
 	if (timer) update();
 }
 
+bool TopBarWidget::eventFilter(QObject *obj, QEvent *e) {
+	if (obj == _membersShowArea) {
+		switch (e->type()) {
+		case QEvent::MouseButtonPress:
+			mousePressEvent(static_cast<QMouseEvent*>(e));
+			return true;
+
+		case QEvent::Enter:
+			main()->setMembersShowAreaActive(true);
+			break;
+
+		case QEvent::Leave:
+			main()->setMembersShowAreaActive(false);
+			break;
+		}
+	}
+	return TWidget::eventFilter(obj, e);
+}
+
 void TopBarWidget::paintEvent(QPaintEvent *e) {
 	Painter p(this);
 
@@ -136,8 +159,7 @@ void TopBarWidget::paintEvent(QPaintEvent *e) {
 }
 
 void TopBarWidget::mousePressEvent(QMouseEvent *e) {
-	PeerData *p = nullptr;// App::main() ? App::main()->profilePeer() : 0;
+	if (e->button() == Qt::LeftButton && e->pos().y() < st::topBarHeight && !_selCount) {
-	if (e->button() == Qt::LeftButton && e->pos().y() < st::topBarHeight && (p || !_selCount)) {
 		emit clicked();
 	}
 }
@@ -209,12 +231,16 @@ void TopBarWidget::startAnim() {
 	_forward->hide();
 	_mediaType->hide();
 	_search->hide();
+	if (_membersShowArea) {
+		_membersShowArea->hide();
+	}
 
 	_animating = true;
 }
 
 void TopBarWidget::stopAnim() {
 	_animating = false;
+	updateMembersShowArea();
 	showAll();
 }
 
@@ -255,21 +281,53 @@ void TopBarWidget::showAll() {
 		_search->hide();
 		_info->hide();
 	}
+	if (_membersShowArea) {
+		_membersShowArea->show();
+	}
 	resizeEvent(nullptr);
 }
 
+void TopBarWidget::updateMembersShowArea() {
+	auto membersShowAreaNeeded = [this]() {
+		if (_selCount || App::main()->overviewPeer() || !_selPeer) {
+			return false;
+		}
+		if (_selPeer->isChat()) {
+			return true;
+		}
+		if (_selPeer->isMegagroup()) {
+			return (_selPeer->asMegagroup()->membersCount() < Global::ChatSizeMax());
+		}
+		return false;
+	};
+	if (!membersShowAreaNeeded()) {
+		if (_membersShowArea) {
+			main()->setMembersShowAreaActive(false);
+			_membersShowArea.destroy();
+		}
+		return;
+	} else if (!_membersShowArea) {
+		_membersShowArea = new TWidget(this);
+		_membersShowArea->show();
+		_membersShowArea->installEventFilter(this);
+	}
+	_membersShowArea->setGeometry(App::main()->getMembersShowAreaGeometry());
+}
+
 void TopBarWidget::showSelected(uint32 selCount, bool canDelete) {
-	PeerData *p = nullptr;// App::main() ? App::main()->profilePeer() : 0;
 	_selPeer = App::main()->overviewPeer() ? App::main()->overviewPeer() : App::main()->peer();
 	_selCount = selCount;
 	_canDelete = canDelete;
 	_selStr = (_selCount > 0) ? lng_selected_count(lt_count, _selCount) : QString();
 	_selStrWidth = st::btnDefLink.font->width(_selStr);
-	setCursor((!p && _selCount) ? style::cur_default : style::cur_pointer);
+	setCursor(_selCount ? style::cur_default : style::cur_pointer);
+
+	updateMembersShowArea();
 	showAll();
 }
 
 void TopBarWidget::updateAdaptiveLayout() {
+	updateMembersShowArea();
 	showAll();
 }
 

Telegram/SourceFiles/window/top_bar_widget.h

@@ -38,9 +38,9 @@ public:
 	TopBarWidget(MainWidget *w);
 
 	void enterEvent(QEvent *e) override;
-	void enterFromChildEvent(QEvent *e) override;
+	void enterFromChildEvent(QEvent *e, QWidget *child) override;
 	void leaveEvent(QEvent *e) override;
-	void leaveToChildEvent(QEvent *e) override;
+	void leaveToChildEvent(QEvent *e, QWidget *child) override;
 	void paintEvent(QPaintEvent *e) override;
 	void mousePressEvent(QMouseEvent *e) override;
 	void resizeEvent(QResizeEvent *e) override;
@@ -54,8 +54,13 @@ public:
 
 	void updateAdaptiveLayout();
 
+	void updateMembersShowArea();
+
 	Ui::RoundButton *mediaTypeButton();
 
+protected:
+	bool eventFilter(QObject *obj, QEvent *e) override;
+
 public slots:
 	void onForwardSelection();
 	void onDeleteSelection();
@@ -87,6 +92,7 @@ private:
 	ChildWidget<Ui::RoundButton> _mediaType;
 
 	ChildWidget<IconedButton> _search;
+	ChildWidget<TWidget> _membersShowArea = { nullptr };
 
 };
 

Telegram/Telegram.vcxproj

@@ -310,6 +310,10 @@
       <ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='Deploy|Win32'">true</ExcludedFromBuild>
       <ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">true</ExcludedFromBuild>
     </ClCompile>
+    <ClCompile Include="GeneratedFiles\Debug\moc_inner_dropdown.cpp">
+      <ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='Deploy|Win32'">true</ExcludedFromBuild>
+      <ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">true</ExcludedFromBuild>
+    </ClCompile>
     <ClCompile Include="GeneratedFiles\Debug\moc_introcode.cpp">
       <ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='Deploy|Win32'">true</ExcludedFromBuild>
       <ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">true</ExcludedFromBuild>
@@ -631,6 +635,10 @@
       <ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">true</ExcludedFromBuild>
       <ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">true</ExcludedFromBuild>
     </ClCompile>
+    <ClCompile Include="GeneratedFiles\Deploy\moc_inner_dropdown.cpp">
+      <ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">true</ExcludedFromBuild>
+      <ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">true</ExcludedFromBuild>
+    </ClCompile>
     <ClCompile Include="GeneratedFiles\Deploy\moc_introcode.cpp">
       <ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">true</ExcludedFromBuild>
       <ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">true</ExcludedFromBuild>
@@ -988,6 +996,10 @@
       <ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='Deploy|Win32'">true</ExcludedFromBuild>
       <ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">true</ExcludedFromBuild>
     </ClCompile>
+    <ClCompile Include="GeneratedFiles\Release\moc_inner_dropdown.cpp">
+      <ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='Deploy|Win32'">true</ExcludedFromBuild>
+      <ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">true</ExcludedFromBuild>
+    </ClCompile>
     <ClCompile Include="GeneratedFiles\Release\moc_introcode.cpp">
       <ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='Deploy|Win32'">true</ExcludedFromBuild>
       <ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">true</ExcludedFromBuild>
@@ -1351,6 +1363,7 @@
     <ClCompile Include="SourceFiles\ui\flatlabel.cpp" />
     <ClCompile Include="SourceFiles\ui\flattextarea.cpp" />
     <ClCompile Include="SourceFiles\ui\images.cpp" />
+    <ClCompile Include="SourceFiles\ui\inner_dropdown.cpp" />
     <ClCompile Include="SourceFiles\ui\popupmenu.cpp" />
     <ClCompile Include="SourceFiles\ui\scrollarea.cpp" />
     <ClCompile Include="SourceFiles\ui\style\style_core.cpp" />
@@ -1949,6 +1962,20 @@
       <Outputs Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">.\GeneratedFiles\$(ConfigurationName)\moc_%(Filename).cpp</Outputs>
       <Command Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">"$(QTDIR)\bin\moc.exe"  "%(FullPath)" -o ".\GeneratedFiles\$(ConfigurationName)\moc_%(Filename).cpp"  -DAL_LIBTYPE_STATIC -DUNICODE -DWIN32 -DWIN64 -DHAVE_STDINT_H -DZLIB_WINAPI -DQT_NO_DEBUG -DNDEBUG -D_SCL_SECURE_NO_WARNINGS  "-I.\SourceFiles" "-I.\GeneratedFiles" "-I.\GeneratedFiles\$(ConfigurationName)\." "-I$(QTDIR)\include" "-I$(QTDIR)\include\QtCore\5.6.0\QtCore" "-I$(QTDIR)\include\QtGui\5.6.0\QtGui" "-I.\..\..\Libraries\breakpad\src" "-I.\..\..\Libraries\lzma\C" "-I.\..\..\Libraries\libexif-0.6.20" "-I.\..\..\Libraries\zlib-1.2.8" "-I.\..\..\Libraries\ffmpeg" "-I.\..\..\Libraries\openal-soft\include" "-I.\ThirdParty\minizip" "-I.\..\..\Libraries\openssl\Release\include" "-fstdafx.h" "-f../../SourceFiles/ui/twidget.h"</Command>
     </CustomBuild>
+    <CustomBuild Include="SourceFiles\ui\inner_dropdown.h">
+      <AdditionalInputs Condition="'$(Configuration)|$(Platform)'=='Deploy|Win32'">$(QTDIR)\bin\moc.exe;%(FullPath)</AdditionalInputs>
+      <Message Condition="'$(Configuration)|$(Platform)'=='Deploy|Win32'">Moc%27ing inner_dropdown.h...</Message>
+      <Outputs Condition="'$(Configuration)|$(Platform)'=='Deploy|Win32'">.\GeneratedFiles\$(ConfigurationName)\moc_%(Filename).cpp</Outputs>
+      <Command Condition="'$(Configuration)|$(Platform)'=='Deploy|Win32'">"$(QTDIR)\bin\moc.exe"  "%(FullPath)" -o ".\GeneratedFiles\$(ConfigurationName)\moc_%(Filename).cpp" "-fstdafx.h" "-f../../SourceFiles/ui/inner_dropdown.h"  -DAL_LIBTYPE_STATIC -DCUSTOM_API_ID -DUNICODE -DWIN32 -DWIN64 -DHAVE_STDINT_H -DZLIB_WINAPI -DQT_NO_DEBUG -DNDEBUG -D_SCL_SECURE_NO_WARNINGS "-I.\SourceFiles" "-I.\GeneratedFiles" "-I.\GeneratedFiles\$(ConfigurationName)\." "-I$(QTDIR)\include" "-I$(QTDIR)\include\QtCore\5.6.0\QtCore" "-I$(QTDIR)\include\QtGui\5.6.0\QtGui" "-I.\..\..\Libraries\breakpad\src" "-I.\..\..\Libraries\lzma\C" "-I.\..\..\Libraries\libexif-0.6.20" "-I.\..\..\Libraries\zlib-1.2.8" "-I.\..\..\Libraries\ffmpeg" "-I.\..\..\Libraries\openal-soft\include" "-I.\ThirdParty\minizip" "-I.\..\..\Libraries\openssl\Release\include"</Command>
+      <AdditionalInputs Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">$(QTDIR)\bin\moc.exe;%(FullPath)</AdditionalInputs>
+      <Message Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">Moc%27ing inner_dropdown.h...</Message>
+      <Outputs Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">.\GeneratedFiles\$(ConfigurationName)\moc_%(Filename).cpp</Outputs>
+      <Command Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">"$(QTDIR)\bin\moc.exe"  "%(FullPath)" -o ".\GeneratedFiles\$(ConfigurationName)\moc_%(Filename).cpp" "-fstdafx.h" "-f../../SourceFiles/ui/inner_dropdown.h"  -DAL_LIBTYPE_STATIC -DUNICODE -DWIN32 -DWIN64 -DHAVE_STDINT_H -DZLIB_WINAPI -D_SCL_SECURE_NO_WARNINGS "-I.\SourceFiles" "-I.\GeneratedFiles" "-I.\GeneratedFiles\$(ConfigurationName)\." "-I$(QTDIR)\include" "-I$(QTDIR)\include\QtCore\5.6.0\QtCore" "-I$(QTDIR)\include\QtGui\5.6.0\QtGui" "-I.\..\..\Libraries\breakpad\src" "-I.\..\..\Libraries\lzma\C" "-I.\..\..\Libraries\libexif-0.6.20" "-I.\..\..\Libraries\zlib-1.2.8" "-I.\..\..\Libraries\ffmpeg" "-I.\..\..\Libraries\openal-soft\include" "-I.\ThirdParty\minizip" "-I.\..\..\Libraries\openssl_debug\Debug\include"</Command>
+      <AdditionalInputs Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">$(QTDIR)\bin\moc.exe;%(FullPath)</AdditionalInputs>
+      <Message Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">Moc%27ing inner_dropdown.h...</Message>
+      <Outputs Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">.\GeneratedFiles\$(ConfigurationName)\moc_%(Filename).cpp</Outputs>
+      <Command Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">"$(QTDIR)\bin\moc.exe"  "%(FullPath)" -o ".\GeneratedFiles\$(ConfigurationName)\moc_%(Filename).cpp" "-fstdafx.h" "-f../../SourceFiles/ui/inner_dropdown.h"  -DAL_LIBTYPE_STATIC -DUNICODE -DWIN32 -DWIN64 -DHAVE_STDINT_H -DZLIB_WINAPI -DQT_NO_DEBUG -DNDEBUG -D_SCL_SECURE_NO_WARNINGS "-I.\SourceFiles" "-I.\GeneratedFiles" "-I.\GeneratedFiles\$(ConfigurationName)\." "-I$(QTDIR)\include" "-I$(QTDIR)\include\QtCore\5.6.0\QtCore" "-I$(QTDIR)\include\QtGui\5.6.0\QtGui" "-I.\..\..\Libraries\breakpad\src" "-I.\..\..\Libraries\lzma\C" "-I.\..\..\Libraries\libexif-0.6.20" "-I.\..\..\Libraries\zlib-1.2.8" "-I.\..\..\Libraries\ffmpeg" "-I.\..\..\Libraries\openal-soft\include" "-I.\ThirdParty\minizip" "-I.\..\..\Libraries\openssl\Release\include"</Command>
+    </CustomBuild>
     <ClInclude Include="SourceFiles\ui\style\style_core.h" />
     <ClInclude Include="SourceFiles\ui\style\style_core_color.h" />
     <ClInclude Include="SourceFiles\ui\style\style_core_font.h" />

Telegram/Telegram.vcxproj.filters

@@ -1329,6 +1329,18 @@
     <ClCompile Include="GeneratedFiles\Release\moc_main_window_linux.cpp">
       <Filter>GeneratedFiles\Release</Filter>
     </ClCompile>
+    <ClCompile Include="SourceFiles\ui\inner_dropdown.cpp">
+      <Filter>SourceFiles\ui</Filter>
+    </ClCompile>
+    <ClCompile Include="GeneratedFiles\Deploy\moc_inner_dropdown.cpp">
+      <Filter>GeneratedFiles\Deploy</Filter>
+    </ClCompile>
+    <ClCompile Include="GeneratedFiles\Debug\moc_inner_dropdown.cpp">
+      <Filter>GeneratedFiles\Debug</Filter>
+    </ClCompile>
+    <ClCompile Include="GeneratedFiles\Release\moc_inner_dropdown.cpp">
+      <Filter>GeneratedFiles\Release</Filter>
+    </ClCompile>
   </ItemGroup>
   <ItemGroup>
     <ClInclude Include="SourceFiles\stdafx.h">
@@ -1864,6 +1876,9 @@
     <CustomBuild Include="SourceFiles\platform\linux\main_window_linux.h">
       <Filter>SourceFiles\platform\linux</Filter>
     </CustomBuild>
+    <CustomBuild Include="SourceFiles\ui\inner_dropdown.h">
+      <Filter>SourceFiles\ui</Filter>
+    </CustomBuild>
   </ItemGroup>
   <ItemGroup>
     <None Include="Resources\langs\lang_it.strings">