Focus query editor when opening new querytab.

Close #7

pglab/MainWindow.cpp

@@ -43,6 +43,7 @@ QueryTab* MainWindow::newSqlPage()
 	ui->tabWidget->addTab(qt, "Tab");
 	ui->tabWidget->setCurrentWidget(qt);
 	qt->newdoc();
+	qt->focusEditor();
 	return qt;
 }
 

pglab/QueryTab.cpp

@@ -598,3 +598,8 @@ void QueryTab::exportData(const QString &file_name)
 		rw->exportData(file_name);
 	}
 }
+
+void QueryTab::focusEditor()
+{
+	ui->queryEdit->setFocus();
+}

pglab/QueryTab.h

@@ -60,6 +60,7 @@ public:
 	QString fileName() const { return m_fileName; }
 	bool isChanged() const { return m_queryTextChanged; }
 	bool isNew() const { return m_new; }
+	void focusEditor();
 private:
 
 	using ResultTabContainer = std::vector<TuplesResultWidget*>;