added shortcuts management support

TODO: integrate it in YACReader
TODO: add icons for groups
TODO: add conflicts detection
TODO: fix any shortcut used in keyPressEvent
TODO: choose new default shortcuts (F5 update, F11 fullscreen, etc...)

shortcuts_management/edit_shortcut_item_delegate.h

@@ -0,0 +1,48 @@
+#ifndef EDIT_SHORTCUT_ITEM_DELEGATE_H
+#define EDIT_SHORTCUT_ITEM_DELEGATE_H
+
+#include <QItemDelegate>
+#include <QLineEdit>
+#include <QKeyEvent>
+#include <QKeySequence>
+#include <QToolButton>
+
+class KeySequenceLineEdit : public QLineEdit
+{
+    Q_OBJECT
+public:
+    explicit KeySequenceLineEdit(QWidget *parent = 0);
+
+protected:
+    //int numKeys;
+    //int keys[4];
+    void keyPressEvent(QKeyEvent *);
+    int translateModifiers(Qt::KeyboardModifiers state, const QString &text);
+    void resizeEvent(QResizeEvent *);
+
+private:
+    QToolButton *clearButton;
+    QToolButton *acceptButton;
+};
+
+class EditShortcutItemDelegate : public QItemDelegate
+{
+    Q_OBJECT
+public:
+    explicit EditShortcutItemDelegate(QObject *parent = 0);
+
+    QWidget *createEditor(QWidget *parent, const QStyleOptionViewItem &option,
+                          const QModelIndex &index) const;
+    void setEditorData(QWidget *editor, const QModelIndex &index) const;
+    void setModelData(QWidget *editor, QAbstractItemModel *model,
+                      const QModelIndex &index) const;
+    void updateEditorGeometry(QWidget *editor, const QStyleOptionViewItem &option, const QModelIndex & mi) const;
+    bool eventFilter(QObject *editor, QEvent *event);
+signals:
+
+public slots:
+    void closeShortcutEditor();
+
+};
+
+#endif // EDIT_SHORTCUT_ITEM_DELEGATE_H