Add picture viewer

Opens on doubleclick when it's image/*.

6 files changed, 127 insertions, 3 deletions

diff --git a/ShemovCleaner.pro b/ShemovCleaner.pro
index 2647e72..f838cce 100644
--- a/ShemovCleaner.pro
+++ b/ShemovCleaner.pro
@@ -26,7 +26,8 @@ SOURCES += main.cpp\
     filedisplay.cpp \
     globals.cpp \
     actorwidget.cpp \
-    origindialog.cpp
+    origindialog.cpp \
+    viewer.cpp
 
 HEADERS  += \
     filesorter.h \
@@ -40,7 +41,8 @@ HEADERS  += \
     filedisplay.h \
     globals.h \
     actorwidget.h \
-    origindialog.h
+    origindialog.h \
+    viewer.h
 
 DISTFILES +=
 
diff --git a/filewidget.cpp b/filewidget.cpp
index 966ad95..f56b4ce 100644
--- a/filewidget.cpp
+++ b/filewidget.cpp
@@ -37,6 +37,7 @@
 #include "origindialog.h"
 #include "helper.h"
 #include "globals.h"
+#include "viewer.h"
 
 FileWidget::FileWidget(QWidget *parent) : QWidget(parent) {
     setupGui();
@@ -505,6 +506,11 @@ void FileWidget::properties(const QModelIndex &idx){
     if(mime.startsWith("video")){
         fileData(name.data(FullPathRole).toString(), name.data(MD5SumRole).toString());
     }
+    if(mime.startsWith("image")){
+        Viewer *v = Globals::instance()->viewer();
+        v->setFile(idx.data(FullPathRole).toString());
+        v->show();
+    }
 }
 
 void FileWidget::cd(const QString &to){
diff --git a/globals.cpp b/globals.cpp
index 2bdb175..53bd1f0 100644
--- a/globals.cpp
+++ b/globals.cpp
@@ -1,6 +1,7 @@
 #include <QAction>
 
 #include "globals.h"
+#include "viewer.h"
 
 Globals *Globals::mInstance = nullptr;
 
@@ -19,4 +20,11 @@ QAction *Globals::action(int actionType){
     return mActions.value(actionType);
 }
 
-Globals::Globals(){}
+Viewer *Globals::viewer(){
+    if(!mViewer){
+        mViewer = new Viewer;
+    }
+    return mViewer;
+}
+
+Globals::Globals() : mViewer(nullptr) {}
diff --git a/globals.h b/globals.h
index f659088..e0bc5ef 100644
--- a/globals.h
+++ b/globals.h
@@ -5,6 +5,7 @@
 #include <QHash>
 
 class QAction;
+class Viewer;
 
 class Globals : public QObject {
     Q_OBJECT
@@ -13,6 +14,7 @@ class Globals : public QObject {
         static Globals *instance();
         void addAction(QAction *a);
         QAction *action(int actionType);
+        Viewer *viewer();
 
     private:
         Globals();
@@ -20,6 +22,7 @@ class Globals : public QObject {
         Globals &operator=(const Globals &other);
         static Globals *mInstance;
         QHash<int, QAction*> mActions;
+        Viewer *mViewer;
 };
 
 #endif // GLOBALS_H
diff --git a/viewer.cpp b/viewer.cpp
new file mode 100644
index 0000000..e8d5f7f
--- /dev/null
+++ b/viewer.cpp
@@ -0,0 +1,79 @@
+#include <QLabel>
+#include <QHBoxLayout>
+#include <QDesktopWidget>
+#include <QApplication>
+#include <QFileInfo>
+#include <QMimeDatabase>
+#include <QDir>
+#include <QWheelEvent>
+
+#include "viewer.h"
+
+Viewer::Viewer(QWidget *parent, Qt::WindowFlags f) : QWidget(parent, f), mCurIndex(-1) {
+    QDesktopWidget *dw = qApp->desktop();
+    mLabel = new QLabel;
+    mLabel->setMaximumSize(dw->size() - QSize(20, 20));
+    QHBoxLayout *mainLayout = new QHBoxLayout;
+    mainLayout->addWidget(mLabel);
+    setLayout(mainLayout);
+}
+
+void Viewer::setFile(const QString &file, bool allFiles){
+    mCurIndex = -1;
+    QFileInfo fi(file);
+    QMimeDatabase db;
+    QMimeType mt = db.mimeTypeForFile(fi);
+    if(mt.name().startsWith("image")){
+        mFiles << fi.absoluteFilePath();
+    }
+    if(allFiles){
+        foreach(auto curFi, fi.dir().entryInfoList()){
+            if(!mFiles.contains(curFi.absoluteFilePath())){
+                QMimeType mt = db.mimeTypeForFile(curFi);
+                if(mt.name().startsWith("image")){
+                    mFiles << curFi.absoluteFilePath();
+                }
+            }
+        }
+    }
+    if(!mFiles.isEmpty()){
+        mCurIndex = 0;
+        displayFile(mCurIndex);
+    }
+}
+
+void Viewer::wheelEvent(QWheelEvent *event){
+    QPoint numDeg = event->angleDelta() / 8;
+    if(numDeg.y() < 0){ //this is scrolling down -> next!
+        if(mCurIndex + 1 >= mFiles.count()){
+            mCurIndex = 0;
+        }else{
+            ++mCurIndex;
+        }
+    }else if(numDeg.y() > 0){
+        if(mCurIndex - 1 < 0){
+            mCurIndex = mFiles.count() - 1;
+        }else{
+            --mCurIndex;
+        }
+    }
+    displayFile(mCurIndex);
+    event->accept();
+}
+
+void Viewer::displayFile(int index){
+    if(index < 0){
+        return;
+    }
+    QPixmap pm(mFiles.at(mCurIndex));
+    if(pm.width() > mLabel->maximumWidth()){
+        pm = pm.scaledToWidth(mLabel->maximumWidth());
+    }
+    if(pm.height() > mLabel->maximumHeight()){
+        pm = pm.scaledToHeight(mLabel->maximumHeight());
+    }
+    mLabel->setPixmap(pm);
+    adjustSize();
+    QString winTitle = QString(tr("%1 Viewer [%2]")).arg(qApp->applicationName()).arg(mFiles.at(mCurIndex));
+    setWindowTitle(winTitle);
+}
diff --git a/viewer.h b/viewer.h
new file mode 100644
index 0000000..6f9537e
--- /dev/null
+++ b/viewer.h
@@ -0,0 +1,26 @@
+#ifndef VIEWER_H
+#define VIEWER_H
+
+#include <QWidget>
+
+class QLabel;
+class QWheelEvent;
+
+class Viewer : public QWidget {
+    public:
+        Viewer(QWidget *parent = 0, Qt::WindowFlags f = 0);
+        void setFile(const QString &file, bool allFiles = true);
+
+    protected:
+        virtual void wheelEvent(QWheelEvent *event);
+
+    private slots:
+        void displayFile(int index);
+
+    private:
+        int mCurIndex;
+        QLabel *mLabel;
+        QStringList mFiles;
+};
+
+#endif // VIEWER_H