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Telegram/SourceFiles/ui/chat/attach/attach_album_preview.h

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+/*
+This file is part of Telegram Desktop,
+the official desktop application for the Telegram messaging service.
+
+For license and copyright information please follow this link:
+https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
+*/
+#pragma once
+
+#include "ui/rp_widget.h"
+#include "ui/chat/attach/attach_send_files_way.h"
+#include "base/timer.h"
+
+namespace style {
+struct ComposeControls;
+} // namespace style
+
+namespace Ui {
+
+struct PreparedFile;
+struct GroupMediaLayout;
+class AlbumThumbnail;
+class PopupMenu;
+
+class AlbumPreview final : public RpWidget {
+public:
+	AlbumPreview(
+		QWidget *parent,
+		const style::ComposeControls &st,
+		gsl::span<Ui::PreparedFile> items,
+		SendFilesWay way,
+		Fn<bool(int, AttachActionType)> actionAllowed);
+	~AlbumPreview();
+
+	void setSendWay(SendFilesWay way);
+
+	[[nodiscard]] base::flat_set<int> collectSpoileredIndices();
+	[[nodiscard]] bool canHaveSpoiler(int index) const;
+	void toggleSpoilers(bool enabled);
+	[[nodiscard]] std::vector<int> takeOrder();
+
+	[[nodiscard]] rpl::producer<int> thumbDeleted() const {
+		return _thumbDeleted.events();
+	}
+	[[nodiscard]] rpl::producer<int> thumbChanged() const {
+		return _thumbChanged.events();
+	}
+	[[nodiscard]] rpl::producer<int> thumbModified() const {
+		return _thumbModified.events();
+	}
+	[[nodiscard]] rpl::producer<int> thumbEditCoverRequested() const {
+		return _thumbEditCoverRequested.events();
+	}
+	[[nodiscard]] rpl::producer<int> thumbClearCoverRequested() const {
+		return _thumbClearCoverRequested.events();
+	}
+	[[nodiscard]] rpl::producer<> orderUpdated() const {
+		return _orderUpdated.events();
+	}
+
+	[[nodiscard]] QImage generatePriceTagBackground() const;
+
+protected:
+	void paintEvent(QPaintEvent *e) override;
+	void mousePressEvent(QMouseEvent *e) override;
+	void mouseMoveEvent(QMouseEvent *e) override;
+	void mouseReleaseEvent(QMouseEvent *e) override;
+
+private:
+	int countLayoutHeight(
+		const std::vector<GroupMediaLayout> &layout) const;
+	std::vector<GroupMediaLayout> generateOrderedLayout() const;
+	std::vector<int> defaultOrder(int count = -1) const;
+	void prepareThumbs(gsl::span<Ui::PreparedFile> items);
+	void updateSizeAnimated(const std::vector<GroupMediaLayout> &layout);
+	void updateSize();
+	void updateFileRows();
+
+	AlbumThumbnail *thumbUnderCursor();
+	void deleteThumbByIndex(int index);
+	void changeThumbByIndex(int index);
+	void modifyThumbByIndex(int index);
+	void thumbButtonsCallback(
+		not_null<AlbumThumbnail*> thumb,
+		AttachButtonType type);
+
+	void switchToDrag();
+
+	void paintAlbum(Painter &p) const;
+	void paintPhotos(Painter &p, QRect clip) const;
+	void paintFiles(Painter &p, QRect clip) const;
+
+	void applyCursor(style::cursor cursor);
+	int contentLeft() const;
+	int contentTop() const;
+	AlbumThumbnail *findThumb(QPoint position) const;
+	not_null<AlbumThumbnail*> findClosestThumb(QPoint position) const;
+	void updateSuggestedDrag(QPoint position);
+	int orderIndex(not_null<AlbumThumbnail*> thumb) const;
+	void cancelDrag();
+	void finishDrag();
+
+	void showContextMenu(not_null<AlbumThumbnail*> thumb, QPoint position);
+
+	const style::ComposeControls &_st;
+	SendFilesWay _sendWay;
+	Fn<bool(int, AttachActionType)> _actionAllowed;
+	style::cursor _cursor = style::cur_default;
+	std::vector<int> _order;
+	std::vector<QSize> _itemsShownDimensions;
+	std::vector<std::unique_ptr<AlbumThumbnail>> _thumbs;
+	int _thumbsHeight = 0;
+	int _photosHeight = 0;
+	int _filesHeight = 0;
+
+	bool _hasMixedFileHeights = false;
+
+	AlbumThumbnail *_draggedThumb = nullptr;
+	AlbumThumbnail *_suggestedThumb = nullptr;
+	AlbumThumbnail *_paintedAbove = nullptr;
+	AlbumThumbnail *_pressedThumb = nullptr;
+	QPoint _draggedStartPosition;
+
+	base::Timer _dragTimer;
+	AttachButtonType _pressedButtonType = AttachButtonType::None;
+
+	rpl::event_stream<int> _thumbDeleted;
+	rpl::event_stream<int> _thumbChanged;
+	rpl::event_stream<int> _thumbModified;
+	rpl::event_stream<int> _thumbEditCoverRequested;
+	rpl::event_stream<int> _thumbClearCoverRequested;
+	rpl::event_stream<> _orderUpdated;
+
+	base::unique_qptr<PopupMenu> _menu;
+
+	mutable Animations::Simple _thumbsHeightAnimation;
+	mutable Animations::Simple _shrinkAnimation;
+	mutable Animations::Simple _finishDragAnimation;
+
+};
+
+} // namespace Ui