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/*
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
2 of the License, or (at your option) any later version.
*/
#include <QGraphicsScene>
#include <QGraphicsPixmapItem>
#include <QFileInfo>
#include <QLinearGradient>
#include <QDesktopWidget>
#include <QApplication>
#include <QDir>
#include <QWheelEvent>
#include <algorithm>
#include "pictureviewer.h"
#include "pictureviewerinfoitem.h"
#include "helper.h"
PictureViewer::PictureViewer(QWidget *parent) : QGraphicsView(parent), mCurrentPic(0), mInfoItem(0) {
mScene = new QGraphicsScene(this);
setScene(mScene);
}
void PictureViewer::showPic(const QString &path){
QFileInfo fi(path);
if(!fi.exists() || fi.isDir()){
return;
}
QPixmap img(path);
if(img.isNull()){
return;
}
if(mCurrentPic){
mScene->removeItem(mCurrentPic);
mScene->removeItem(mInfoItem);
delete mCurrentPic;
delete mInfoItem;
mCurrentPic = 0;
mInfoItem = 0;
}
setDir(path);
if(!isVisible()){
show();
}
QSize maxSize;
QDesktopWidget *desktopWidget = QApplication::desktop();
QSize desktopSize = desktopWidget->availableGeometry().size();
if((img.height() > desktopSize.height()) || (img.width() > desktopSize.height())){
maxSize = desktopSize;
}else{
maxSize = img.size();
}
if(img.width() > maxSize.width() || img.height() > maxSize.height()){
img = img.scaled(maxSize, Qt::KeepAspectRatio, Qt::SmoothTransformation);
}
resize(img.size() + QSize(20, 20));
setSceneRect(viewport()->rect());
QGraphicsPixmapItem *item = new QGraphicsPixmapItem(img);
mCurrentPic = item;
item->setPos(center(img));
mScene->addItem(item);
PictureviewerInfoItem *infoItem = new PictureviewerInfoItem(fi.fileName());
QRectF infoItemRect = infoItem->boundingRect();
int infoWidth = infoItemRect.size().width();
int viewportWidth = viewport()->size().width();
int center = (viewportWidth - infoWidth) / 2;
mInfoItem = infoItem;
QPoint infoPoint = QPoint(center, 10);
infoItem->setPos(infoPoint);
mScene->addItem(infoItem);
}
void PictureViewer::next(){
if(mCurrentEntry == mDirEntries.constEnd()){
return;
}
QString nextPath;
while(mCurrentEntry != mDirEntries.constEnd()){
++mCurrentEntry;
if(mCurrentEntry == mDirEntries.constEnd()){
break;
}
QFileInfo fi = *mCurrentEntry;
if(isPic(fi.absoluteFilePath())){
nextPath = fi.absoluteFilePath();
break;
}
}
if(!nextPath.isEmpty()){
showPic(nextPath);
}
}
void PictureViewer::previous(){
if(mCurrentEntry == mDirEntries.constBegin()){
return;
}
QString nextPath;
while(mCurrentEntry != mDirEntries.constBegin()){
--mCurrentEntry;
QFileInfo fi = *mCurrentEntry;
if(isPic(fi.absoluteFilePath())){
nextPath = fi.absoluteFilePath();
break;
}
}
if(!nextPath.isEmpty()){
showPic(nextPath);
}
}
void PictureViewer::wheelEvent(QWheelEvent *event){
int steps = event->delta() / 8 / 15;
if(steps < 0){
next();
}else{
previous();
}
}
void PictureViewer::setGradient(){
QColor c1(255, 7, 15);
QColor c2(80, 55, 250);
QLinearGradient g(QPointF(0, 0), sceneRect().bottomRight());
g.setColorAt(0, c1);
g.setColorAt(1, c2);
setBackgroundBrush(QBrush(g));
}
void PictureViewer::setDir(const QString &path){
QFileInfo fi(path);
QString dir = fi.absolutePath();
if(dir == mCurrentDir || !fi.exists()){
return;
}
mCurrentDir = dir;
QDir currentDir = QDir(mCurrentDir);
mDirEntries = currentDir.entryInfoList(QDir::Files, QDir::Name);
std::sort(mDirEntries.begin(), mDirEntries.end(), Helper::SortFileInfoList());
mCurrentEntry = std::find_if(mDirEntries.constBegin(), mDirEntries.constEnd(), std::bind2nd(Helper::FileInfoListContains(), fi.fileName()));
}
bool PictureViewer::isPic(const QString &path){
QFileInfo fi(path);
if(!fi.exists() || !fi.isFile()){
return false;
}
QString mime = Helper::mimeType(path);
if(mime.toLower().startsWith("image")){
return true;
}
return false;
}
QPointF PictureViewer::center(const QPixmap &pic){
QSize viewportSize = viewport()->size();
float x = (viewportSize.width() - pic.width()) / 2;
float y = (viewportSize.height() - pic.height()) / 2;
return QPointF(x, y);
}
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