From b8cf5d2f394c151c6b095396dafdc66162cb060e Mon Sep 17 00:00:00 2001
From: Mikko Rasa <tdb@tdb.fi>
Date: Fri, 9 Aug 2013 13:54:57 +0300
Subject: [PATCH] Use Widget::find_ancestor to reduce code duplication

---
 source/engineer/controlpanel.cpp    |  6 +-----
 source/engineer/mainwindow.cpp      |  6 +-----
 source/engineer/newtraindialog.cpp  |  6 +-----
 source/engineer/trainlistdialog.cpp | 12 ++----------
 source/engineer/vehiclespanel.cpp   |  7 ++-----
 5 files changed, 7 insertions(+), 30 deletions(-)

diff --git a/source/engineer/controlpanel.cpp b/source/engineer/controlpanel.cpp
index 050b376..07651c0 100644
--- a/source/engineer/controlpanel.cpp
+++ b/source/engineer/controlpanel.cpp
@@ -75,12 +75,8 @@ void ControlPanel::take_clicked()
 
 void ControlPanel::view_clicked()
 {
-	GLtk::Container *root = parent;
-	while(root->get_parent())
-		root = root->get_parent();
-
 	TrainView *dlg = new TrainView(engineer, train);
-	root->add(*dlg);
+	find_ancestor<GLtk::Root>()->add(*dlg);
 	dlg->autosize();
 }
 
diff --git a/source/engineer/mainwindow.cpp b/source/engineer/mainwindow.cpp
index 6e3888c..f5c8df7 100644
--- a/source/engineer/mainwindow.cpp
+++ b/source/engineer/mainwindow.cpp
@@ -57,12 +57,8 @@ void MainWindow::halt_clicked()
 
 void MainWindow::trains_clicked()
 {
-	GLtk::Container *root = parent;
-	while(root->get_parent())
-		root = root->get_parent();
-
 	TrainListDialog *dlg = new TrainListDialog(engineer);
-	root->add(*dlg);
+	find_ancestor<GLtk::Root>()->add(*dlg);
 	dlg->autosize();
 }
 
diff --git a/source/engineer/newtraindialog.cpp b/source/engineer/newtraindialog.cpp
index 11fd5c0..78a3f11 100644
--- a/source/engineer/newtraindialog.cpp
+++ b/source/engineer/newtraindialog.cpp
@@ -67,12 +67,8 @@ void NewTrainDialog::on_response(int code)
 		Train *train = new Train(engineer.get_layout(), type, address, protocol);
 		train->set_name(ent_name->get_text());
 
-		GLtk::Container *root = parent;
-		while(root->get_parent())
-			root = root->get_parent();
-
 		TrainDialog *dlg = new TrainDialog(engineer, *train);
-		root->add(*dlg);
+		find_ancestor<GLtk::Root>()->add(*dlg);
 		dlg->autosize();
 	}
 }
diff --git a/source/engineer/trainlistdialog.cpp b/source/engineer/trainlistdialog.cpp
index 0a31d67..5d0c9fe 100644
--- a/source/engineer/trainlistdialog.cpp
+++ b/source/engineer/trainlistdialog.cpp
@@ -48,12 +48,8 @@ TrainListDialog::TrainListDialog(Engineer &e):
 
 void TrainListDialog::new_clicked()
 {
-	GLtk::Container *root = parent;
-	while(root->get_parent())
-		root = root->get_parent();
-
 	NewTrainDialog *dlg = new NewTrainDialog(engineer);
-	root->add(*dlg);
+	find_ancestor<GLtk::Root>()->add(*dlg);
 	dlg->autosize();
 }
 
@@ -62,12 +58,8 @@ void TrainListDialog::show_clicked()
 	int index = lst_trains->get_selected_index();
 	if(index>=0)
 	{
-		GLtk::Container *root = parent;
-		while(root->get_parent())
-			root = root->get_parent();
-
 		TrainDialog *dlg = new TrainDialog(engineer, *trains.get(index));
-		root->add(*dlg);
+		find_ancestor<GLtk::Root>()->add(*dlg);
 		dlg->autosize();
 	}
 }
diff --git a/source/engineer/vehiclespanel.cpp b/source/engineer/vehiclespanel.cpp
index d906f6c..cd3b7cf 100644
--- a/source/engineer/vehiclespanel.cpp
+++ b/source/engineer/vehiclespanel.cpp
@@ -1,5 +1,6 @@
 #include <msp/core/maputils.h>
 #include <msp/gltk/button.h>
+#include <msp/gltk/root.h>
 #include <msp/strings/format.h>
 #include "libr2c2/layout.h"
 #include "libr2c2/vehicle.h"
@@ -40,12 +41,8 @@ VehiclesPanel::VehiclesPanel(Train &t):
 
 void VehiclesPanel::add_clicked()
 {
-	GLtk::Container *root = parent;
-	while(root->get_parent())
-		root = root->get_parent();
-
 	NewVehicleDialog *dlg = new NewVehicleDialog(train);
-	root->add(*dlg);
+	find_ancestor<GLtk::Root>()->add(*dlg);
 	dlg->autosize();
 }
 
-- 
2.43.0