1 files changed, 59 insertions, 9 deletions

diff --git a/pictureviewer2.cpp b/pictureviewer2.cpp
index 0c2530e..c126c2c 100644
--- a/pictureviewer2.cpp
+++ b/pictureviewer2.cpp
@@ -10,15 +10,17 @@
 #include <QGraphicsScene>
 #include <QGraphicsPixmapItem>
 #include <QImage>
+#include <QWheelEvent>
 
 #include "pictureviewer2.h"
 
-const QString PictureViewer2::mDefaultFile(":/picgone.png");
-
-PictureViewer2::PictureViewer2(QWidget *parent) : QGraphicsView(parent), mCur(0) {
+PictureViewer2::PictureViewer2(QWidget *parent) : QGraphicsView(parent), mCur(0), mCurPos(0), mDefaultFile(":/picgone.png") {
     //behave like QDialog, but don't be one...
     setWindowFlags(QFlags<Qt::WindowType>(0x1|0x2|0x1000|0x2000|0x10000|0x8000000));
 
+    //initial file list
+    mFiles = QStringList() << mDefaultFile;
+
     //setup gui
     mScene = new QGraphicsScene(this);
     setScene(mScene);
@@ -28,10 +30,58 @@ PictureViewer2::PictureViewer2(QWidget *parent) : QGraphicsView(parent), mCur(0)
     setMinimumSize(mMinimunSize);
     move(50, 50);
     setVisible(false);
-    setFile();
+    showFile(mFiles.at(mCurPos));
+}
+
+void PictureViewer2::addFiles(const QStringList &files, bool clear){
+    if(clear){
+        mFiles.clear();
+        mFiles = files;
+        mCurPos = 0;
+        return;
+    }
+    foreach(const QString &f, files){
+        if(!mFiles.contains(f)){
+            mFiles.append(f);
+        }
+    }
 }
 
-void PictureViewer2::setFile(const QString file){
+void PictureViewer2::setFile(const QString &file){
+    addFiles(QStringList() << file, true);
+    showFile(mFiles.at(mCurPos));
+}
+
+QSize PictureViewer2::sizeHint() const{
+    return mMinimunSize;
+}
+
+void PictureViewer2::next(){
+    if(mCurPos + 1 >= mFiles.size()){
+        return;
+    }
+    ++mCurPos;
+    showFile(mFiles.at(mCurPos));
+}
+
+void PictureViewer2::previous(){
+    if(mCurPos - 1 < 0){
+        return;
+    }
+    --mCurPos;
+    showFile(mFiles.at(mCurPos));
+}
+
+void PictureViewer2::wheelEvent(QWheelEvent *event){
+    int steps = event->delta() / 8 / 15;
+    if(steps < 0){
+        next();
+    }else{
+        previous();
+    }
+}
+
+void PictureViewer2::showFile(const QString file){
     QPixmap pixmap(file);
     if(pixmap.isNull()){
         return;
@@ -45,9 +95,13 @@ void PictureViewer2::setFile(const QString file){
         mCur = 0;
     }
     mCur = new QGraphicsPixmapItem(pixmap);
+    float cX = width() - pixmap.width() / 2;
+    float cY = height() - pixmap.height() / 2;
+    mCur->setPos(QPointF(cX, cY));
     mScene->addItem(mCur);
 }
 
+
 void PictureViewer2::setCurPalette(const QPixmap &pic){
     QPoint val1 = QPoint(qrand() % pic.width(), qrand() % pic.height());
     QPoint val2 = QPoint(qrand() % pic.width(), qrand() % pic.height());
@@ -59,7 +113,3 @@ void PictureViewer2::setCurPalette(const QPixmap &pic){
     g.setColorAt(1, c2);
     setBackgroundBrush(QBrush(g));
 }
-
-QSize PictureViewer2::sizeHint() const{
-    return mMinimunSize;
-}