squawk/ui/widgets/messageline/preview.h

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/*
* Squawk messenger.
* Copyright (C) 2019 Yury Gubich <blue@macaw.me>
*
* This program 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.
*
* This program 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.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#pragma once
#include <QWidget>
#include <QString>
#include <QPoint>
#include <QSize>
#include <QLabel>
#include <QIcon>
#include <QPixmap>
#include <QMovie>
#include <QFont>
#include <QFontMetrics>
#include <QImageReader>
#include <shared/global.h>
/**
* @todo write docs
*/
class Preview {
public:
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Preview(const QString& pPath, const QSize& pMaxSize, const QPoint& pos, QWidget* parent);
~Preview();
void actualize(const QString& newPath, const QSize& newSize, const QPoint& newPoint);
void setPosition(const QPoint& newPoint);
void setSize(const QSize& newSize);
bool setPath(const QString& newPath);
bool isFileReachable() const;
QSize size() const;
static QSize constrainAttachSize(QSize src, QSize bounds);
static QSize calculateAttachSize(const QString& path, const QRect& bounds);
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static bool canVisualize(const Shared::Global::FileInfo& info);
static QFont font;
static QFontMetrics metrics;
private:
void initializeElements();
void positionElements();
void clean();
void applyNewSize();
void applyNewMaxSize();
void handleQMovieError(QImageReader::ImageReaderError error);
private:
Shared::Global::FileInfo info;
QSize maxSize;
QSize actualSize;
QSize cachedLabelSize;
QPoint position;
QLabel* widget;
QLabel* label;
QWidget* parent;
QMovie* movie;
bool fileReachable;
bool actualPreview;
};