Git: Refactoring ChangeSelectionDialog

- added ability to fix working directory in constructor
- show tooltip for commit

Change-Id: Ife69bed696960b8ce0b929a24f45bc8bba85df49
Reviewed-by: Tobias Hunger <tobias.hunger@digia.com>
Reviewed-by: Orgad Shaneh <orgads@gmail.com>

src/plugins/git/changeselectiondialog.h

@@ -31,6 +31,8 @@
 #define CHANGESELECTIONDIALOG_H
 
 #include <QDialog>
+#include <QProcessEnvironment>
+QT_FORWARD_DECLARE_CLASS(QProcess)
 
 #include "ui_changeselectiondialog.h"
 
@@ -41,7 +43,8 @@ class ChangeSelectionDialog : public QDialog
 {
     Q_OBJECT
 public:
-    ChangeSelectionDialog(QWidget *parent = 0);
+    ChangeSelectionDialog(const QString &workingDirectory = QString(), QWidget *parent = 0);
+    ~ChangeSelectionDialog();
 
     QString change() const;
 
@@ -51,8 +54,15 @@ public:
 public slots:
     void selectWorkingDirectory();
 
+private slots:
+    void setToolTip(int exitCode);
+    void recalculateToolTip(const QString &ref);
+
 private:
     Ui_ChangeSelectionDialog m_ui;
+    QProcess* m_process;
+    QString m_gitBinaryPath;
+    QProcessEnvironment m_gitEnvironment;
 };
 
 } // namespace Internal