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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 <QDesktopWidget>
#include <QApplication>
#include <QGraphicsScene>
#include <QGraphicsPixmapItem>
#include <QImage>
#include <QWheelEvent>
#include <QContextMenuEvent>
#include <QMenu>
#include <QTimer>
#include <QPainter>
#include <QStyleOptionGraphicsItem>
#include "pictureviewer2.h"
#include "pictureswidget.h"
PictureViewer2::PictureViewer2(QWidget *parent) : QGraphicsView(parent), mCur(0), mCurPos(0), mDefaultFile(":/picgone.png"), mFnItem(0) {
//behave like QDialog, but don't be one...
setWindowFlags(QFlags<Qt::WindowType>(0x1|0x2|0x1000|0x2000|0x10000|0x8000000));
//initial file list
PicData initialData;
for(int i = 0; i < PicFilesModel::NumFields; ++i){
initialData << QVariant();
}
initialData[PicFilesModel::FullPath] = mDefaultFile;
mFiles << initialData;
//picture show
mSlideTimer = new QTimer(this);
connect(mSlideTimer, SIGNAL(timeout()), this, SLOT(next()));
//setup gui
mScene = new QGraphicsScene(this);
setScene(mScene);
QDesktopWidget *dw = QApplication::desktop();
QSize screenSize = dw->availableGeometry().size();
mMinimunSize = QSize(screenSize.width() - 100, screenSize.height() - 100);
setMinimumSize(mMinimunSize);
move(50, 50);
setVisible(false);
mScene->setSceneRect(QRectF(0, 0, width() - 10, height() - 10));
showFile(mFiles.at(mCurPos));
}
void PictureViewer2::addFiles(const PicDataList &files, bool clear){
if(clear){
mFiles.clear();
mFiles = files;
mCurPos = 0;
return;
}
foreach(const PicData &f, files){
if(!mFiles.contains(f)){
mFiles.append(f);
}
}
}
void PictureViewer2::setFile(const PicData &file){
addFiles(PicDataList() << file, true);
showFile(mFiles.at(mCurPos));
}
QSize PictureViewer2::sizeHint() const{
return mMinimunSize;
}
void PictureViewer2::next(){
if(mCurPos + 1 >= mFiles.size()){
mCurPos = 0;
}else{
++mCurPos;
}
showFile(mFiles.at(mCurPos));
}
void PictureViewer2::previous(){
if(mCurPos - 1 < 0){
mCurPos = mFiles.size() - 1;
}else{
--mCurPos;
}
showFile(mFiles.at(mCurPos));
}
void PictureViewer2::slide(){
if(mSlideTimer->isActive()){
mSlideTimer->stop();
}else{
mSlideTimer->start(5000);
}
}
void PictureViewer2::wheelEvent(QWheelEvent *event){
int steps = event->delta() / 8 / 15;
if(steps < 0){
next();
}else{
previous();
}
}
void PictureViewer2::contextMenuEvent(QContextMenuEvent *e){
QMenu ctxMenu;
foreach(QAction *a, actions()){
ctxMenu.addAction(a);
}
ctxMenu.exec(e->globalPos());
}
void PictureViewer2::showFile(const PicData &file){
QPixmap pixmap(file.at(PicFilesModel::FullPath).toString());
if(pixmap.isNull()){
return;
}
setCurPalette(pixmap);
if((pixmap.height() > height()) || (pixmap.width() > width())){
pixmap = pixmap.scaled(QSize(width() - 3, height() - 10), Qt::KeepAspectRatio, Qt::SmoothTransformation);
}
if(mCur){
mScene->removeItem(mCur);
delete mCur;
mCur = 0;
}
mCur = new QGraphicsPixmapItem(pixmap);
float cX = (width() / 2) - (pixmap.width() / 2);
float cY = height() / 2 - pixmap.height() / 2;
mScene->addItem(mCur);
mCur->setPos(cX, cY);
setWindowTitle(constructWindowTitle());
constructFilenameItem(mFiles.at(mCurPos).at(PicFilesModel::FileName).toString());
}
void PictureViewer2::constructFilenameItem(const QString &filename){
if(mFnItem){
mScene->removeItem(mFnItem);
delete mFnItem;
}
mFnItem = new PictureViewer2FilenameItem(filename);
QSizeF itemSize = mFnItem->boundingRect().size();
int thisWidth = size().width();
int xPos = (thisWidth / 2) - (itemSize.width() / 2);
mFnItem->setPos(xPos, 0);
mScene->addItem(mFnItem);
}
void PictureViewer2::setCurPalette(const QPixmap &pic){
QPoint val1 = QPoint(qrand() % pic.width(), qrand() % pic.height());
QPoint val2 = QPoint(qrand() % pic.width(), qrand() % pic.height());
QImage img = pic.toImage();
QColor c1(img.pixel(val1));
QColor c2(img.pixel(val2));
QLinearGradient g(QPoint(0,0), QPoint(rect().bottomRight()));
g.setColorAt(0, c1);
g.setColorAt(1, c2);
setBackgroundBrush(QBrush(g));
}
QString PictureViewer2::constructWindowTitle() const {
QString retval = QString(tr("PicViewer 2 - [%1]")).arg(mFiles.at(mCurPos).at(PicFilesModel::FileName).toString());
return retval;
}
PictureViewer2FilenameItem::PictureViewer2FilenameItem(const QString &fileName, QGraphicsItem *parent) : QGraphicsItem(parent), mFilename(fileName) {
setZValue(1);
}
QRectF PictureViewer2FilenameItem::boundingRect() const {
QSize size = qApp->fontMetrics().size(Qt::TextSingleLine, mFilename);
size += QSize(2, 2);
QRectF retval;
retval.setWidth(size.width());
retval.setHeight(size.height());
return retval;
}
void PictureViewer2FilenameItem::paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget){
Q_UNUSED(option);
Q_UNUSED(widget);
painter->save();
painter->setRenderHint(QPainter::Antialiasing, false);
painter->setRenderHint(QPainter::TextAntialiasing, true);
QColor bgColor = QColor(237, 12, 102);
bgColor.setAlpha(70);
QColor fgColor = QColor(209, 207, 232);
QBrush brush(bgColor);
painter->setPen(QColor(Qt::yellow));
painter->setBrush(brush);
painter->drawRect(boundingRect());
painter->setPen(QPen(fgColor));
QPoint start(1, qApp->fontMetrics().ascent() + 1);
painter->drawText(start, mFilename);
painter->restore();
}
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