Added expand/collapse animation to emoji picker overlay.

Telegram/SourceFiles/boxes/sticker_creator_box.cpp

@@ -212,10 +212,15 @@ void CreateStickerBox(
 		.maxSelected = kMaxEmojis,
 		.allowExpand = true,
 	};
-	const auto overlayExpanded = [&] {
+	const auto pickerCollapsed = [&] {
+		auto probe = ChatHelpers::EmojiPickerOverlay(nullptr, pickerDescriptor);
+		return probe.collapsedHeight();
+	}();
+	const auto pickerExpanded = [&] {
 		auto probe = ChatHelpers::EmojiPickerOverlay(nullptr, pickerDescriptor);
 		return probe.expandedHeight();
 	}();
+	const auto pickerExtra = pickerExpanded - pickerCollapsed;
 
 	const auto previewHolder = inner->add(
 		object_ptr<Ui::RpWidget>(inner),
@@ -223,7 +228,7 @@ void CreateStickerBox(
 		style::al_top);
 	previewHolder->resize(
 		st::boxWideWidth,
-		kPreviewSide + overlayExpanded / 2);
+		kPreviewSide + pickerExtra);
 	const auto preview = Ui::CreateChild<PreviewWidget>(
 		previewHolder,
 		image);
@@ -236,12 +241,9 @@ void CreateStickerBox(
 		const auto w = std::min(
 			previewHolder->width() - 2 * st::boxRowPadding.left(),
 			int(kPreviewSide * 1.1));
-		const auto h = picker->expanded()
-			? picker->expandedHeight()
-			: picker->collapsedHeight();
 		const auto x = (previewHolder->width() - w) / 2;
-		const auto y = kPreviewSide - h;
-		picker->setGeometry(x, y, w, h);
+		const auto y = kPreviewSide - pickerCollapsed;
+		picker->setGeometry(x, y, w, pickerExpanded);
 		picker->raise();
 	};
 
@@ -251,11 +253,6 @@ void CreateStickerBox(
 		layoutOverlay();
 	}, preview->lifetime());
 
-	picker->expandedValue(
-	) | rpl::on_next([=](bool) {
-		layoutOverlay();
-	}, picker->lifetime());
-
 	Ui::AddSkip(inner);
 
 	const auto startUpload = [=, set = std::move(set), done = std::move(done)](

Telegram/SourceFiles/chat_helpers/emoji_picker_overlay.cpp

@@ -240,7 +240,7 @@ void EmojiPickerOverlay::Strip::mouseReleaseEvent(QMouseEvent *e) {
 	const auto index = _pressed;
 	_pressed = -1;
 	if (released == index && index >= 0 && index < int(_cells.size())) {
-		_owner->toggleEmoji(_cells[index].emoji);
+		_owner->toggleEmoji(_cells[index].emoji, false);
 	}
 }
 
@@ -346,7 +346,7 @@ void EmojiPickerOverlay::Grid::mouseReleaseEvent(QMouseEvent *e) {
 	const auto index = _pressed;
 	_pressed = -1;
 	if (released == index && index >= 0 && index < int(_cells.size())) {
-		_owner->toggleEmoji(_cells[index].emoji);
+		_owner->toggleEmoji(_cells[index].emoji, true);
 	}
 }
 
@@ -402,22 +402,10 @@ EmojiPickerOverlay::EmojiPickerOverlay(
 			object_ptr<Grid>(_scroll.get(), this));
 		_grid = gridPtr.data();
 		_grid->setEmojis(_allForGrid);
-
-		_expanded.value(
-		) | rpl::on_next([=](bool value) {
-			if (_scroll) {
-				_scroll->setVisible(value);
-			}
-			if (_expandButton) {
-				_expandButton->update();
-			}
-			resize(width(), value ? expandedHeight() : collapsedHeight());
-			relayout();
-		}, lifetime());
 	}
 
 	_selectedVar = _selectedList;
-	resize(width(), collapsedHeight());
+	resize(width(), expandedHeight());
 }
 
 EmojiPickerOverlay::~EmojiPickerOverlay() = default;
@@ -432,10 +420,49 @@ EmojiPickerOverlay::selectedValue() const {
 }
 
 void EmojiPickerOverlay::setExpanded(bool expanded) {
-	if (!_allowExpand) {
+	if (!_allowExpand || _expanded.current() == expanded) {
 		return;
 	}
+	startExpandAnimation(expanded);
 	_expanded = expanded;
+	if (_expandButton) {
+		_expandButton->update();
+	}
+}
+
+void EmojiPickerOverlay::startExpandAnimation(bool expanded) {
+	const auto from = _expandAnim.value(expanded ? 0. : 1.);
+	const auto to = expanded ? 1. : 0.;
+	_expandAnim.start(
+		[=] { applyExpandProgress(); },
+		from,
+		to,
+		st::slideWrapDuration,
+		anim::easeOutCirc);
+	applyExpandProgress();
+}
+
+float64 EmojiPickerOverlay::currentExpandValue() const {
+	return _expandAnim.value(_expanded.current() ? 1. : 0.);
+}
+
+int EmojiPickerOverlay::currentShownHeight() const {
+	const auto progress = currentExpandValue();
+	return anim::interpolate(
+		collapsedHeight(),
+		expandedHeight(),
+		progress);
+}
+
+void EmojiPickerOverlay::applyExpandProgress() {
+	const auto h = currentShownHeight();
+	setMask(QRegion(0, 0, width(), h));
+	if (_scroll) {
+		const auto progress = currentExpandValue();
+		_scroll->setVisible(progress > 0.);
+	}
+	relayout();
+	update();
 }
 
 bool EmojiPickerOverlay::expanded() const {
@@ -465,13 +492,21 @@ void EmojiPickerOverlay::paintEvent(QPaintEvent *e) {
 	p.setPen(Qt::NoPen);
 	p.setBrush(st::stickersEmojiPickerBg);
 	const auto radius = st::stickersEmojiPickerRadius;
-	p.drawRoundedRect(rect(), radius, radius);
+	const auto h = currentShownHeight();
+	p.drawRoundedRect(QRect(0, 0, width(), h), radius, radius);
 }
 
 void EmojiPickerOverlay::resizeEvent(QResizeEvent *e) {
+	setMask(QRegion(0, 0, width(), currentShownHeight()));
 	relayout();
 }
 
+void EmojiPickerOverlay::mousePressEvent(QMouseEvent *e) {
+	if (e->pos().y() > currentShownHeight()) {
+		e->ignore();
+	}
+}
+
 void EmojiPickerOverlay::relayout() {
 	const auto &pad = st::stickersEmojiPickerPadding;
 	if (_about) {
@@ -520,7 +555,7 @@ void EmojiPickerOverlay::relayout() {
 	}
 }
 
-void EmojiPickerOverlay::toggleEmoji(EmojiPtr emoji) {
+void EmojiPickerOverlay::toggleEmoji(EmojiPtr emoji, bool fromGrid) {
 	if (!emoji) {
 		return;
 	}
@@ -537,6 +572,9 @@ void EmojiPickerOverlay::toggleEmoji(EmojiPtr emoji) {
 		_selectedList.push_back(emoji);
 	}
 	notifySelectionChanged();
+	if (fromGrid) {
+		setExpanded(false);
+	}
 }
 
 void EmojiPickerOverlay::notifySelectionChanged() {
@@ -549,8 +587,4 @@ void EmojiPickerOverlay::notifySelectionChanged() {
 	}
 }
 
-void EmojiPickerOverlay::buildSections() {
-	// Reserved for potential future categorised rendering in the grid.
-}
-
 } // namespace ChatHelpers

Telegram/SourceFiles/chat_helpers/emoji_picker_overlay.h

@@ -8,6 +8,7 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 #pragma once
 
 #include "ui/rp_widget.h"
+#include "ui/effects/animations.h"
 #include "ui/emoji_config.h"
 
 namespace Ui {
@@ -46,15 +47,19 @@ public:
 protected:
 	void paintEvent(QPaintEvent *e) override;
 	void resizeEvent(QResizeEvent *e) override;
+	void mousePressEvent(QMouseEvent *e) override;
 
 private:
 	class Strip;
 	class Grid;
 
-	void buildSections();
 	void relayout();
-	void toggleEmoji(EmojiPtr emoji);
+	void toggleEmoji(EmojiPtr emoji, bool fromGrid);
 	void notifySelectionChanged();
+	void startExpandAnimation(bool expanded);
+	void applyExpandProgress();
+	[[nodiscard]] float64 currentExpandValue() const;
+	[[nodiscard]] int currentShownHeight() const;
 
 	const QString _aboutText;
 	const std::vector<EmojiPtr> _recent;
@@ -72,6 +77,7 @@ private:
 	Ui::AbstractButton *_expandButton = nullptr;
 	std::unique_ptr<Ui::ScrollArea> _scroll;
 	Grid *_grid = nullptr;
+	Ui::Animations::Simple _expandAnim;
 
 };